Korea Electric Power (KEP) 20-F 30 Apr 24 2023 FY Annual report (foreign) Financial data

Cover Page

Cover Page	12 Months Ended
	Dec. 31, 2023 shares
Document Information [Line Items]
Entity Registrant Name	KOREA ELECTRIC POWER CORPORATION
Entity Central Index Key	0000887225
Document Type	20-F
Document Period End Date	Dec. 31, 2023
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	641,964,077
Entity Interactive Data Current	Yes
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
Document Registration Statement	false
ICFR Auditor Attestation Flag	true
Entity File Number	001-13372
Entity Incorporation, State or Country Code	M5
Entity Address, Address Line One	55 Jeollyeok-ro
Entity Address, City or Town	Naju-si
Entity Address, Country	KR
Entity Address, Postal Zip Code	58322
Document Accounting Standard	International Financial Reporting Standards
Auditor Name	Ernst & Young Han Young
Auditor Firm ID	1437
Auditor Location	Seoul, the Republic of Korea
Document Financial Statement Error Correction [Flag]	false
Business Contact [Member]
Document Information [Line Items]
Entity Address, Address Line One	55 Jeollyeok-ro
Entity Address, City or Town	Naju-si
Entity Address, Country	KR
Entity Address, Postal Zip Code	58322
Contact Personnel Name	Hwayun Kim
City Area Code	61
Local Phone Number	345 4218
Contact Personnel Email Address	kim0430@kepco.co.kr
Common Stock
Document Information [Line Items]
Trading Symbol	KEP
Title of 12(b) Security	Common stock, par value Won 5,000 per share
Security Exchange Name	NYSE
ADS
Document Information [Line Items]
Trading Symbol	KEP
Title of 12(b) Security	American depositary shares, each representing one-half of share of common stock
Security Exchange Name	NYSE

Consolidated Statements of Fina

Consolidated Statements of Financial Position - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents (Notes 5,6,7 and 45)		₩ 4,342,887	₩ 3,234,780
Current financial assets, net (Notes 5,6,9,11,12,13,45 and 47)		3,107,397	4,286,975
Trade and other receivables, net (Notes 5,8,20,24,45,46 and 47)		11,985,735	10,461,822
Inventories, net (Note 14)		8,875,615	9,930,732
Income tax receivables (Note 41)		69,612	46,619
Current non-financial assets (Note 15)		1,109,321	1,744,869
Assets held-for-sale (Note 16 and 42)		45,648	44,748
Total current assets		29,536,215	29,750,545
Non-current assets
Non-current financial assets, net (Notes 5,6,9,10,11,12,13,45 and 47)		3,546,214	3,336,835
Non-current trade and other receivables, net (Notes 5,8,20,45,46 and 47)		2,193,587	2,153,080
Property, plant and equipment, net (Notes 4,18,24,27 and 49)		179,875,535	177,865,308
Investment properties, net (Notes 4,19 and 27)		185,527	208,286
Goodwill (Note 4 and 16)		99,156	100,093
Intangible assets other than goodwill, net (Notes 4,21,27 and 46)		1,033,984	956,664
Investments in associates (Notes 4 and 17)		6,176,889	5,844,464
Investments in joint ventures (Notes 4 and 17)		3,485,699	3,147,584
Defined benefit assets, net (Note 25)		70,187	198,626
Deferred tax assets (Note 41)		13,161,802	10,934,375
Non-current non-financial assets (Note 4 and 15)		350,170	309,134
Total non-current assets		210,178,750	205,054,449
Total Assets (Note 4)		239,714,965	234,804,994
Current liabilities
Trade and other payables, net (Notes 5,22,24,45 and 47)		9,089,973	11,983,549
Current financial liabilities, net (Notes 5,12,23,45 and 47)		41,139,726	22,703,996
Income tax payables (Note 41)		482,934	429,604
Current non-financial liabilities (Notes 20,28 and 29)		7,881,663	6,974,377
Current provisions (Notes 26 and 45)		2,654,125	2,427,051
Total current liabilities		61,248,421	44,518,577
Non-current liabilities
Non-current trade and other payables, net (Notes 5,22,24,45 and 47)		4,981,957	5,638,914
Non-current financial liabilities, net (Notes 5,12,23,45 and 47)		92,944,338	98,334,120
Non-current non-financial liabilities (Notes 28 and 29)		11,196,000	10,662,661
Employee benefits liabilities, net (Notes 25 and 45)		1,035,320	828,721
Deferred tax liabilities (Note 41)		5,163,135	6,457,103
Non-current provisions (Notes 26 and 45)		25,881,044	26,364,642
Total non-current liabilities		141,201,794	148,286,161
Total liabilities (Note 4)		202,450,215	192,804,738
Equity
Share capital		3,209,820	3,209,820
Share premium		843,758	843,758
Contributed capital (Notes 1,30 and 45)		4,053,578	4,053,578
Legal reserves	[1]	1,604,910	1,604,910
Voluntary reserves		2,812,313	27,782,969
Unappropriated retained earnings (undisposed deficit)		11,921,039	(7,956,579)
Retained earnings (Note 31)		16,338,262	21,431,300
Other capital surplus		1,600,801	1,268,569
Accumulated other comprehensive income		557,430	496,976
Other equity		13,294,972	13,294,973
Other components of equity (Note 34)		15,453,203	15,060,518
Equity attributable to owners of the controlling company		35,845,043	40,545,396
Non-controlling interests (Notes 16 and 33)		1,419,707	1,454,860
Total Equity		37,264,750	42,000,256
Total Liabilities and Equity		₩ 239,714,965	₩ 234,804,994
[1]The KEPCO Act requires KEPCO to appropriate a legal reserve equal to at least 20 percent of net income for each accounting period until the reserve equals 50 percent of KEPCO’s common stock. The legal reserve is not available for cash dividends; however, this reserve may be credited to paid-in capital or offset against accumulated deficit by the resolution of the shareholders.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income or Loss - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of comprehensive income [abstract]
Total revenue from external customers (Notes 4, 35, 45, 47)	₩ 87,476,410	₩ 70,546,024	₩ 60,012,375
Sales of goods (Note 2)	85,940,137	69,184,469	58,800,977
Sales of construction services (Note 20)	785,395	646,953	754,998
Sales of services	750,878	714,602	456,400
Cost of sales (Notes 2,14,25,43 and 47)	(89,699,527)	(100,903,594)	(63,644,290)
Cost of sales of goods	(88,066,120)	(99,441,768)	(62,164,425)
Cost of sales of construction services	(1,003,601)	(941,254)	(898,963)
Cost of sales of services	(629,806)	(520,572)	(580,902)
Gross loss	(2,223,117)	(30,357,570)	(3,631,915)
Selling and administrative expenses (Notes 25,36,43 and 47)	(3,061,582)	(3,009,422)	(2,875,796)
Other income (Note 28 and 37)	1,275,902	1,095,489	1,034,133
Other expenses (Note 37)	(258,905)	(212,150)	(257,932)
Other gains (losses), net (Note 38)	22,686	243,122	8,519
Operating loss (Note 4)	(4,245,016)	(32,240,531)	(5,722,991)
Finance income (Notes 5,12 and 39)	1,425,031	1,833,312	1,402,614
Finance expenses (Notes 5,12 and 40)	(5,347,018)	(4,746,791)	(3,245,777)
Gain on valuation of investments in associates and joint ventures	804,141	1,393,486	775,588
Gain on disposal of investments in associates and joint ventures	18,204	11,091	1,844
Reversal of impairment loss on investments in associates and joint ventures	347
Gain on disposal of investments in subsidiaries	2
Loss on valuation of investments in associates and joint ventures	(209,085)	(55,193)	(218,532)
Loss on disposal of investments in associates and joint ventures	0	(1,675)	(64,119)
Loss on impairment of investments in associates and joint ventures	(19)	(5,174)	0
Loss on disposal of investments in subsidiaries	(564)	(32,144)	(197)
Profit (loss) related to associates, joint ventures and subsidiaries (Notes 4,16 and 17)	613,026	1,310,391	494,584
Loss before income tax	(7,553,977)	(33,843,619)	(7,071,570)
Income tax benefit (Note 41)	2,837,833	9,414,511	1,855,989
Loss for the year	(4,716,144)	(24,429,108)	(5,215,581)
Other comprehensive income (loss), net of tax (Notes 5,12,25,31 and 34)	(228,672)	1,246,869	599,614
Items that will not be reclassified subsequently to profit or loss:
Remeasurements of defined benefit liability (Notes 25 and 31)	(271,724)	663,095	210,409
Share of other comprehensive income (loss) of associates and joint ventures (Note 31)	(27,349)	12,305	3,609
Net change in fair value of financial assets at fair value through other comprehensive income (loss) (Note 34)	(31,665)	58,010	59,024
Items that may be reclassified subsequently to profit or loss:
Net change in the unrealized fair value of derivatives using cash flow hedge accounting (Notes 5, 12 and 34)	(3,654)	(24,415)	(15,778)
Foreign currency translation of foreign operations (Note 34)	(17,274)	28,387	41,189
Share of other comprehensive income of associates and joint ventures (Note 34)	122,994	509,487	301,161
Total comprehensive loss for the year	(4,944,816)	(23,182,239)	(4,615,967)
Profit (loss) attributable to:
Owners of the controlling company (Note 44)	(4,822,549)	(24,466,853)	(5,304,522)
Non-controlling interests	106,405	37,745	88,941
Loss for the year	(4,716,144)	(24,429,108)	(5,215,581)
Total comprehensive income (loss) attributable to:
Owners of the controlling company	(5,032,584)	(23,273,171)	(4,743,513)
Non-controlling interests	87,768	90,932	127,546
Total comprehensive loss for the year	₩ (4,944,816)	₩ (23,182,239)	₩ (4,615,967)
Earnings (loss) per share (in won) (Note 44)
Basic earnings (loss) per share	₩ (7,512)	₩ (38,112)	₩ (8,263)
Diluted earnings (loss) per share	₩ (7,512)	₩ (38,112)	₩ (8,263)

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - KRW (₩) ₩ in Millions	Total	Equity attributable to owners of parent	Contributed capital	Non-controlling interests	Retained earnings	Other Components Of Equity
Beginning balance at Dec. 31, 2020	₩ 70,668,059	₩ 69,297,409	₩ 4,053,578	₩ 1,370,650	₩ 51,134,330	₩ 14,109,501
Comprehensive income
Profit (loss) for the year	(5,215,581)	(5,304,522)	0	88,941	(5,304,522)	0
Items that will not be reclassified subsequently to profit or loss:
Remeasurements of defined benefit liability, net of tax	210,409	201,067	0	9,342	201,067	0
Share of other comprehensive income (loss) of associates and joint ventures, net of tax	3,609	3,609	0	0	3,609	0
Net change in fair value of financial assets at fair value through other comprehensive income, net of tax	59,024	59,022	0	2	0	59,022
Items that may be reclassified subsequently to profit or loss:
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	(15,778)	(19,610)	0	3,832	0	(19,610)
Foreign currency translation of foreign operations, net of tax	41,189	15,760	0	25,429	0	15,760
Share of other comprehensive income of associates and joint ventures, net of tax	301,161	301,161	0	0	0	301,161
Dividends paid	(812,144)	(780,628)	0	(31,516)	(780,628)	0
Additional paid-in capital and others	75,211	(491)	0	75,702	0	(491)
Transactions between consolidated entities	(34,747)	7,452	0	(42,199)	0	7,452
Changes in consolidation scope	59,679	43	0	59,636	0	43
Dividends paid (hybrid bond)	(13,385)	0	0	(13,385)	0	0
Others	0	0	0	0	4,388	(4,388)
Ending balance at Dec. 31, 2021	65,326,706	63,780,272	4,053,578	1,546,434	45,258,244	14,468,450
Comprehensive income
Profit (loss) for the year	(24,429,108)	(24,466,853)	0	37,745	(24,466,853)	0
Items that will not be reclassified subsequently to profit or loss:
Remeasurements of defined benefit liability, net of tax	663,095	626,769	0	36,326	626,769	0
Share of other comprehensive income (loss) of associates and joint ventures, net of tax	12,305	12,305	0	0	12,305	0
Net change in fair value of financial assets at fair value through other comprehensive income, net of tax	58,010	58,008	0	2	0	58,008
Items that may be reclassified subsequently to profit or loss:
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	(24,415)	(32,437)	0	8,022	0	(32,437)
Foreign currency translation of foreign operations, net of tax	28,387	19,550	0	8,837	0	19,550
Share of other comprehensive income of associates and joint ventures, net of tax	509,487	509,487	0	0	0	509,487
Dividends paid	(42,344)	0	0	(42,344)	0	0
Additional paid-in capital and others	126,792	40,476	0	86,316	835	39,641
Transactions between consolidated entities	(77,375)	(1,584)	0	(75,791)	0	(1,584)
Changes in consolidation scope	31,714	(597)	0	32,311	0	(597)
Dividends paid (hybrid bond)	(13,461)	0	0	(13,461)	0	0
Repayment of hybrid bond	(169,537)	0	0	(169,537)	0	0
Ending balance at Dec. 31, 2022	42,000,256	40,545,396	4,053,578	1,454,860	21,431,300	15,060,518
Comprehensive income
Profit (loss) for the year	(4,716,144)	(4,822,549)	0	106,405	(4,822,549)	0
Items that will not be reclassified subsequently to profit or loss:
Remeasurements of defined benefit liability, net of tax	(271,724)	(242,987)	0	(28,737)	(242,987)	0
Share of other comprehensive income (loss) of associates and joint ventures, net of tax	(27,349)	(27,349)	0	0	(27,349)	0
Net change in fair value of financial assets at fair value through other comprehensive income, net of tax	(31,665)	(31,665)	0	0	0	(31,665)
Items that may be reclassified subsequently to profit or loss:
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	(3,654)	(5,078)	0	1,424	0	(5,078)
Foreign currency translation of foreign operations, net of tax	(17,274)	(25,950)	0	8,676	0	(25,950)
Share of other comprehensive income of associates and joint ventures, net of tax	122,994	122,994	0	0	0	122,994
Dividends paid	(45,322)	0	0	(45,322)	0	0
Additional paid-in capital and others	6,023	(1)	0	6,024	0	(1)
Transactions between consolidated entities	258,485	332,280	0	(73,795)	0	332,280
Changes in consolidation scope	336	(48)	0	384	0	(48)
Dividends paid (hybrid bond)	(10,212)	0	0	(10,212)	0	0
Others	0	0	0	0	(153)	153
Ending balance at Dec. 31, 2023	₩ 37,264,750	₩ 35,845,043	₩ 4,053,578	₩ 1,419,707	₩ 16,338,262	₩ 15,453,203

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Loss for the year	₩ (4,716,144)	₩ (24,429,108)	₩ (5,215,581)
Adjustments to reconcile profit (loss) for the year to net cash provided by operating activities:
Income tax benefit	(2,837,833)	(9,414,511)	(1,855,989)
Depreciation	12,869,089	12,305,252	11,776,331
Amortization	163,174	156,160	166,161
Employee benefit expense	358,730	485,700	512,270
Bad debt expense	101,550	29,997	67,242
Interest expense	4,451,659	2,818,546	1,914,457
Loss on disposal of financial assets	1	1,841	1,045
Loss on disposal of property, plant and equipment	98,120	100,066	92,622
Loss on abandonment of property, plant and equipment	196,697	160,909	207,934
Loss (gain) on impairment of property, plant and equipment	17,031	(97,425)	4,056
Loss on impairment of intangible assets	2,865	164	0
Loss on disposal of intangible assets	71	116	145
Increase in provisions	1,611,082	2,146,979	2,466,452
Loss on foreign currency translation, net	363,659	523,285	997,119
Gain on valuation of financial assets at fair value through profit or loss	(152,322)	(7,099)	(14,338)
Loss on valuation of financial assets at fair value through profit or loss	24,015	44,329	5,480
Valuation and transaction gain on derivative instruments, net	(323,858)	(448,903)	(907,076)
Gain on valuation of investments in associates and joint ventures, net	(595,056)	(1,338,293)	(557,056)
Gain on disposal of financial assets	(13,162)	(11,199)	(7,718)
Reversal of impairment loss on intangible assets	0	0	(14)
Gain on disposal of property, plant and equipment	(32,196)	(148,667)	(56,284)
Gain on disposal of intangible assets	(136)	(41)	(1)
Gain on disposal of investments in associates and joint ventures	(18,204)	(11,091)	(1,844)
Loss on disposal of investments in associates and joint ventures	0	1,675	64,119
Impairment loss on investments in associates and joint ventures	19	5,174	0
Reversal of impairment loss on investments in associates and joint ventures	(347)	0
Gain on disposal of subsidiaries	(2)	0
Loss on disposal of investments in subsidiaries	564	32,144	197
Interest income	(429,620)	(340,753)	(221,874)
Dividend income	(25,941)	(28,875)	(10,522)
Others, net	6,910	215,943	(169,856)
Adjustments to reconcile profit (loss) for the year to net cash provided by operating activities	15,836,559	7,181,423	14,473,058
Changes in working capital:
Trade receivables	(1,484,134)	(1,909,649)	(216,734)
Non-trade receivables	625,993	80,444	869,870
Accrued income	(258,993)	(34,706)	(17,918)
Other receivables	56,460	80,236	24,306
Other current assets	251,842	(651,926)	(569,732)
Inventories	147,798	(3,000,669)	(1,738,000)
Other non-current assets	(101,576)	58,790	(3,462)
Trade payables	(3,154,822)	2,782,474	2,144,561
Non-trade payables	(960,450)	61,737	(571,051)
Accrued expenses	(228,464)	(191,681)	(456,992)
Other current liabilities	901,692	446,064	379,378
Other non-current liabilities	437,809	422,916	458,007
Investments in associates and joint ventures (dividends received)	592,812	473,700	288,242
Provisions	(1,497,699)	(1,564,243)	(2,426,017)
Payments of employee benefit obligations	(281,383)	(218,319)	(159,477)
Plan assets	(188,566)	(347,778)	(317,707)
Changes in working capital	(5,141,681)	(3,512,610)	(2,312,726)
Cash generated from operating activities	5,978,734	(20,760,295)	6,944,751
Dividends received (financial assets at fair value through other comprehensive income)	25,941	28,875	10,522
Interest paid	(4,245,838)	(2,517,694)	(1,928,160)
Interest received	329,740	220,471	201,022
Income taxes paid	(566,415)	(448,857)	(736,757)
Net cash provided by (used in) operating activities	1,522,162	(23,477,500)	4,491,378
Cash flows from investing activities
Proceeds from disposals of investments in associates and joint ventures	5,806	56,171	4,472
Acquisition of investments in associates and joint ventures	(497,634)	(360,962)	(673,017)
Proceeds from disposals of property, plant and equipment	309,627	629,924	277,998
Acquisition of property, plant and equipment	(13,908,373)	(12,346,878)	(12,686,726)
Proceeds from disposals of intangible assets	153	279	59
Acquisition of intangible assets	(74,832)	(80,508)	(113,100)
Disposal of investment properties	0	515	0
Proceeds from disposals of financial assets	4,389,228	14,182,348	7,023,674
Acquisition of financial assets	(3,141,906)	(16,496,258)	(5,893,404)
Increase in loans	(212,994)	(401,377)	(223,950)
Collection of loans	124,386	102,061	218,704
Increase in deposits	(138,205)	(237,266)	(222,924)
Decrease in deposits	130,221	141,000	166,066
Proceeds from disposals of assets held-for-sale	28,727	24,205	1,148
Receipt of government grants	57,207	50,755	37,920
Net cash outflow from changes in consolidation scope	(25,849)	(31,350)	(63,492)
Other cash outflow from investing activities, net	(119,319)	(186,412)	(225,948)
Net cash used in investing activities	(13,073,757)	(14,953,753)	(12,372,520)
Cash flows from financing activities
Proceeds from short-term borrowings, net	1,946,992	5,852,426	1,621,440
Proceeds from long-term borrowings and debt securities	21,714,092	43,594,078	17,392,311
Repayment of long-term borrowings and debt securities	(10,968,160)	(10,252,688)	(9,360,357)
Payment of lease liabilities	(574,239)	(562,646)	(572,036)
Settlement of derivative instruments, net	332,263	407,627	98,068
Change in non-controlling interests	218,766	175,645	90,096
Repayment of hybrid bond	0	(169,537)	0
Dividends paid (hybrid bond)	(10,212)	(13,461)	(13,385)
Dividends paid	(45,323)	(42,348)	(812,159)
Other cash Inflow (outflow) from financing activities, net	47,703	8,803	(8,901)
Net cash provided by financing activities	12,661,882	38,997,899	8,435,077
Net increase in cash and cash equivalents before effect of exchange rate fluctuations	1,110,287	566,646	553,935
Effect of exchange rate fluctuations on cash held	(2,180)	32,896	51,719
Net increase in cash and cash equivalents	1,108,107	599,542	605,654
Cash and cash equivalents at January 1	3,234,780	2,635,238	2,029,584
Cash and cash equivalents at December 31	₩ 4,342,887	₩ 3,234,780	₩ 2,635,238

Reporting Entity (Description o

Reporting Entity (Description of the controlling company)	12 Months Ended
	Dec. 31, 2023
Reporting Entity (Description of the controlling company) [Abstract]
Reporting Entity (Description of the controlling company)	1. Reporting Entity (Description of the controlling company) Korea Electric Power Corporation (“KEPCO”) was incorporated on December 31, 1981 in accordance with the Korea Electric Power Corporation engage in the generation, transmission and distribution of electricity and development of electric power resources KEPCO’s stock was first listed on the Korea Stock Exchange on August 10, 1989 and subsequently on the New York Stock Exchange on October 27, 1994 through its depository receipts Naju-si, As of December 31, 2023, KEPCO’s share capital amounts to ￦3,209,820 million and KEPCO’s shareholders are as follows: Number of Percentage of The Government of the Republic of Korea 116,841,794 18.20 % Korea Development Bank (KDB) 211,235,264 32.90 % Foreign investors 86,927,104 13.54 % Other 226,959,915 35.36 % 641,964,077 100.00 % In accordance with the Restructuring Plan enacted on January 21, 1999 by the Ministry of Trade, Industry and Energy, KEPCO spun off its power generation divisions on April 2, 2001, resulting in the establishment of six power generation subsidiaries.

Basis of Preparation

Basis of Preparation	12 Months Ended
	Dec. 31, 2023
Basis of Preparation [Abstract]
Basis of Preparation	2. Basis of Preparation The consolidated financial statements of KEPCO and its subsidiaries (the “Company”) were approved by the Board of Directors of KEPCO on February 23, 2024 and authorized on April 19, 2024 for the purpose of Form 20-F (1) Statement of compliance These consolidated financial statements have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB). (2) Basis of measurement These consolidated financial statements have been prepared on the historical cost basis, except for the following material items in the consolidated statements o • financial assets at fair value through profit or loss; • financial assets at fair value through other comprehensive income or loss; • derivative financial instruments are measured at fair value; or • liabilities for defined benefit plans are recognized at the net of the total present value of defined benefit obligations less the fair value of plan assets. (3) Functional and presentation currency These consolidated financial statements are presented in Korean won (presented as “￦”, “won” or “KRW”), which is also the functional currency of KEPCO and most of the significant operating subsidiaries. (4) Use of estimates and judgments The preparation of the consolidated financial statements in conformity with IFRS requires management to make judgments, estimates and assumptions that affect the application of accounting policies and the reported amounts of assets, liabilities, income and expenses. Actual results may differ from these estimates. Estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected. Meanwhile, the Company considers climate-related matters in estimates and assumptions, where appropriate. This assessment includes a wide range of possible impacts on the group due to both physical and transition risks. Even though the Company believes its business model and products will still be viable after the transition to a low-carbon economy, climate-related matters increase the uncertainty in estimates and assumptions underpinning several items in the financial statements. Even though climate-related risks might not currently have a significant impact on measurement, the Company is closely monitoring relevant changes and developments, such as new climate-related legislation. The followings are the key assumptions and other key sources of estimation uncertainty at the end of the reporting period, that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year. (i) Useful lives of property, plant and equipment, intangible assets other than goodwill and estimations on provision for decommissioning costs The Company reviews the estimated useful lives of property, plant and equipment at the end of each annual reporting period. Management’s assumptions could affect the determination of estimated economic useful lives. The Company records the fair value of estimated decommissioning costs as a liability in the period in which the Company incurs a legal obligation associated with the retirement of long-lived assets that result from acquisition, construction, development and/or normal use of the assets. The Company is required to record a liability for the dismantling (demolition) of nuclear power plants and disposal of spent fuel and low and intermediate radioactive wastes. The measurement of such liability is subject to change based on change in estimated cash flow, inflation rate, discount rate, and expected timing of decommissioning. (ii) Deferred tax The Company recognizes deferred tax assets and liabilities based on the differences between the financial statement carrying amounts and the tax bases of assets and liabilities of each consolidated taxpaying entity. However, the amount of deferred tax assets may be different if the Company determines the estimated future taxable income is not sufficient to realize the deferred tax assets recognized. (iii) Valuations of financial instruments at fair values The Company’s accounting policies and disclosures require the measurement of fair values, for both financial and non-financial If third party information, such as broker quotes or pricing services, is used to measure fair values, then the valuation team assesses the evidence obtained from the third parties to support the conclusion that such valuations meet the requirements of IFRS including the level in the fair value hierarchy in which such valuation techniques should be classified. When measuring the fair value of an asset or a liability, the Company uses market observable data as far as possible. Fair values are categorized into different levels in a fair value hierarchy based on the inputs used in the valuation techniques as follows. If the inputs used to measure the fair value of an asset or a liability might be categorized in different levels of the fair value hierarchy, then the fair value measurement is categorized in its entirety in the same level of the fair value hierarchy as the lowest level input that is significant to the entire measurement. The Company recognizes transfers between levels of the fair value hierarchy at the end of the reporting period during which the change has occurred. (iv) Defined employee benefit liabilities The Company offers its employees defined benefit plans. The cost of providing benefits is determined using the Projected Unit Credit Method, with actuarial valuations being carried out at the end of each reporting period. For actuarial valuations, certain inputs such as discount rates and future salary increases are estimated. Defined benefit plans contain significant uncertainties in estimations due to its long-term nature (refer to Note 25). (v) Unbilled revenue Electricity delivered but neither metered nor billed is estimated at the reporting date based on the volume of electricity delivered which can vary significantly as a result of customer usage patterns, customer mix, meter reading schedules, weather, and etc. Unbilled revenue recognized as of December 31, 2022 and 2023 are ￦2,348,813 million and ￦2,504,479 million, respectively. (vi) Construction contracts The Company recognizes revenue over time using the cost-based input method which represents a faithful depiction of the Company’s progress towards complete satisfaction of providing the power plant construction, which has been identified as a single performance obligation. In applying the cost-based input method, it is necessary to use estimates and assumptions related to the Company’s efforts or inputs expected to be incurred. Costs incurred towards contract completion include costs associated with direct materials, labor, and other indirect costs related to contract performance. Judgment is required in estimating the costs expected to incur in completing the construction projects which involves estimating future materials, labor, contingencies and other related costs. Revenue is estimated based on the contractual amount; however, it can also be affected by uncertainties resulting from unexpected future events. Information about critical judgments in applying accounting policies that have the most significant effect on the amounts recognized in the consolidated financial statements is included in the following notes: • Note 17 – Investments in Associates and Joint Ventures • Note 18 – Property, Plant and Equipment • Note 20 – Construction Contracts • Note 45 – Risk Management Information about assumptions and estimation uncertainties that have a significant risk of resulting in a material adjustment within the next financial year is included in the following notes: • Note 25 – Employment Benefits • Note 41 – Income Taxes (5) Changes in accounting policies Changes in accounting standards effective from January 1, 2023 are as follows. The Company believes that these amendments have no significant impact on the Company’s consolidated financial statements. The Company has not early adopted any other standards, interpretations or amendments that has been issued but is not yet effective. Amendments to IFRS 17—‘Insurance Contracts’ The amendments provide a comprehensive new accounting standard for insurance contracts covering recognition and measurement, presentation and disclosure. IFRS 17 replaces IFRS 4 ‘Insurance Contracts’. IFRS 17 applies to all types of insurance contracts (i.e., life, non-life, re-insurance), • a specific adaptation for contracts with direct participation features (the variable fee approach); and • a simplified approach (the premium allocation approach) mainly for short-duration contracts. Amendments to IAS 8—‘Definition of Accounting Estimates’ The amendments to IAS 8 clarify the distinction between changes in accounting estimates, and changes in accounting policies and the correction of errors. They also clarify how entities use measurement techniques and inputs to develop accounting estimates. Amendments to IAS 1—‘Disclosure of Accounting Policies’ The amendments to IAS 1 provide guidance and examples to help entities apply materiality judgements to accounting policy disclosures. The amendments aim to help entities provide accounting policy disclosures that are more useful by replacing the requirement for entities to disclose their ‘significant’ accounting policies with a requirement to disclose their ‘material’ accounting policies and adding guidance on how entities apply the concept of materiality in making decisions about accounting policy disclosures. Amendments to IAS 12—‘Deferred Tax related to Assets and Liabilities arising from a Single Transaction’ The amendments IAS 12 ‘Income Taxes’ narrow the scope of the initial recognition exception, so that it no longer applies to transactions that give rise to equal taxable and deductible temporary differences such as leases and decommissioning liabilities. Amendments to IAS 12—‘International Tax Reform : Pillar Two Model Rules’ The amendments to IAS 12 have been introduced in response to the OECD’s BEPS Pillar Two Model Rules and include: • a mandatory temporary exception to the recognition and disclosure of deferred taxes arising from the jurisdictional implementation of the Pillar Two Model Rules; and • disclosure requirements for affected entities to help users of the financial statements better understand an entity’s exposure to Pillar Two income taxes arising from that legislation, particularly before its effective date. The mandatory temporary exception—the use of which is required to be disclosed—applies immediately. The remaining disclosure requirements apply for annual reporting periods beginning on or after January 1, 2023, but not for any interim periods ending on or before December 31, 2023. The Company has applied the mandatory exception to recognizing and disclosing information about deferred tax assets and liabilities arising from Pillar Two income taxes. Since the Pillar Two Model Rules legislation shall be effective from January 1, 2024, the Company has not recognized any Pillar Two income taxes for the year ended December 31, 2023. The impact of Pillar Two Model Rules is described in Note 41. (8).

Material Accounting Policies

Material Accounting Policies	12 Months Ended
	Dec. 31, 2023
Disclosure Of Material Accounting Policies [Abstract]
Material Accounting Policies	3. Material Accounting Policies The accounting policies applied by the Company in these consolidated financial statements are the same as those applied by the Company in its consolidated financial statements as of and for the year ended December 31, 2022, except for the changes described in Note 2.(5). (1) Basis of consolidation The consolidated financial statements are the financial statements of the Company in which the assets, liabilities, equity, income, expenses and cash flows of KEPCO and its subsidiaries are presented as those of a single economic entity. Subsidiaries are those entities controlled by the Company. The Company controls an entity when it is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. Income and expense of a subsidiary acquired or disposed of during the year are included in the consolidated statement of comprehensive income or loss from the effective date of acquisition and up to the effective date of disposal, as appropriate. Total comprehensive income of subsidiaries is attributed to the owners of the Company and to the non-controlling non-controlling When necessary, adjustments are made to the financial statements of subsidiaries to bring their accounting policies in line with those of the Company. All intra-company assets and liabilities, equity, income, expenses and cash flows relating to transactions between entities within the Company are eliminated in full on consolidation. Changes in the Company’s ownership interests in a subsidiary that do not result in the Company losing control over the subsidiary are accounted for as equity transactions. The carrying amounts of the Company’s interests and the non-controlling non-controlling When the Company loses control of a subsidiary, the income or loss on disposal is calculated as the difference between (i) the aggregate of the fair value of the consideration received and the fair value of any retained interest and (ii) the previous carrying amount of the assets (including goodwill), and liabilities of the subsidiary and any non-controlling (2) Business combinations A business combination is accounted for by applying the acquisition method, unless it is a combination involving entities or businesses under common control. The consideration transferred in a business combination is measured at fair value, which is calculated as the sum of the acquisition-date fair values of the assets transferred by the Company, liabilities incurred by the Company to the former owners of the acquiree and the equity interests issued by the Company in exchange for control of the acquiree. Acquisition-related costs are generally recognized in profit or loss as incurred. At the acquisition date, the identifiable assets acquired and the liabilities assumed are recognized at their fair value at the acquisition date, except that: • deferred tax assets or liabilities and liabilities or assets related to employee benefit arrangements are recognized and measured in accordance with IAS 12 ‘Income Taxes’ and IAS 19 ‘Employee Benefits’ respectively; • assets (or disposal groups) that are classified as held for sale in accordance with IFRS 5 ‘Non-current Goodwill is measured as the excess of the sum of the consideration transferred, the amount of any non-controlling non-controlling Non-controlling non-controlling recognized amounts of the acquiree’s identifiable net assets. The choice of measurement can be elected on a transaction-by-transaction non-controlling When the consideration transferred by the Company in a business combination includes assets or liabilities resulting from a contingent consideration arrangement, the contingent consideration is measured at its acquisition-date fair value and included as part of the consideration transferred in a business combination. Changes in the fair value of the contingent consideration that qualify as measurement period adjustments are adjusted retrospectively, with corresponding adjustments against goodwill. Measurement period adjustments are adjustments that arise from additional information obtained during the ‘measurement period’ (which cannot exceed one year from the acquisition date) about facts and circumstances that existed at the acquisition date. The subsequent accounting for changes in the fair value of the contingent consideration that do not qualify as measurement period adjustments depends on how the contingent consideration is classified. Contingent consideration that is classified as equity is not re-measured re-measured When a business combination is achieved in stages, the Company’s previously held equity interest in the acquiree is re-measured If the initial accounting for a business combination is incomplete by the end of the reporting period in which the combination occurs, the Company reports provisional amounts for the items for which the accounting is incomplete. Those provisional amounts are adjusted during the measurement period (see above), or additional assets or liabilities are recognized, to reflect new information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the amounts recognized at that date. The assets and liabilities acquired under business combinations under common control are recognized at the carrying amounts recognized previously in the consolidated financial statements of the ultimate parent. The difference between consideration transferred and carrying amounts of net assets acquired is recognized as part of share premium. (3) Investments in associates An associate is an entity over which the Company has significant influence and that is neither a subsidiary nor an interest in a joint venture. Significant influence is the power to participate in the financial and operating policy decisions of the investee but does not control or joint control over those policies. If the Company holds 20% ~ 50% of the voting power of the investee, it is presumed that the Company has significant influence over the investee. The results and assets and liabilities of associates are incorporated in these consolidated financial statements using the equity method of accounting. If the investment is classified as held for sale, in which case it is accounted for in accordance with IFRS 5 ‘Non-current Under the equity method, an investment in an associate is initially recognized in the consolidated statement of financial position at cost and adjusted thereafter to recognize the Company’s share of the profit or loss and other comprehensive income of the associate. When the Company’s share of losses of an associate exceeds the Company’s interest in that associate (which includes any long-term interests that, in substance, form part of the Company’s net investment in the associate), the Company discontinues recognizing its share of further losses. Additional losses are recognized only to the extent that the Company has incurred legal or constructive obligations or made payments on behalf of the associate. Any excess of the cost of acquisition over the Company’s share of the net fair value of the identifiable assets, liabilities and contingent liabilities of an associate recognized at the date of acquisition is recognized as goodwill, which is included within the carrying amount of the investment. Any excess of the Company’s share of the net fair value of the identifiable assets, liabilities and contingent liabilities over the cost of acquisition, after reassessment, is recognized immediately in profit or loss. Upon disposal of an associate that results in the Company losing significant influence over that associate, any retained investment is measured at fair value at that date and the fair value is regarded as its fair value on initial recognition as a financial asset in accordance with IFRS 9. The difference between the previous carrying amount of the associate attributable to the retained interest and its fair value is included in the determination of the gain or loss on disposal of the associate. In addition, the Company accounts for all amounts previously recognized in other comprehensive income in relation to that associate on the same basis as would be required if that associate had directly disposed of the related assets or liabilities. Therefore, if a gain or loss previously recognized in other comprehensive income by that associate would be reclassified to profit or loss on the disposal of the related assets or liabilities, the Company reclassifies the gain or loss from equity to profit or loss (as a reclassification adjustment) when it loses significant influence over that associate. The requirements of IAS 28’ Investments in Associates and Joint Ventures’ are applied to determine whether it is necessary to recognize any impairment loss with respect to the Company’s investment in an associate. When necessary, the entire carrying amount of the investment (including goodwill) is tested for impairment in accordance with IAS 36 ‘Impairment of Assets’ as a single asset by comparing its recoverable amount (higher of value in use and fair value less costs to sell) with its carrying amount, any impairment loss recognized forms part of the carrying amount of the investment. Any reversal of that impairment loss is recognized in accordance with IAS 36 to the extent that the recoverable amount of the investment subsequently increases. When the Company transacts with its associate, incomes and losses resulting from the transactions with the associate are recognized in the Company’s consolidated financial statements only to the extent of interests in the associate that are not related to the Company. (4) Joint arrangements A joint arrangement is an arrangement of which two or more parties have joint control. Joint control is the contractually agreed sharing of control of an arrangement, which exists only when decisions about the relevant activities require the unanimous consent of the parties sharing control. Joint arrangements are classified into two types - joint operations and joint ventures. A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement (i.e., joint operators) have rights to the assets, and obligations for the liabilities, relating to the arrangement. A joint venture is a joint arrangement whereby the parties that have joint control of the arrangement (i.e., joint ventures) have rights to the net assets of the arrangement. The classification of a joint arrangement as a joint operation or a joint venture depends upon the rights and obligations of the parties to the arrangement. The Company determines the type of joint arrangement in which it is involved by considering the structure and form of the arrangement, the terms agreed by the parties in the contractual arrangement and other facts and circumstances. If the joint arrangement is a joint operation, the Company is to recognize and measure the assets and liabilities (and recognize the related revenues and expenses) in relation to its interest in the arrangement in accordance with relevant IFRSs applicable to the particular assets, liabilities, revenues and expenses. If the joint arrangement is a joint venture, the Company is to account for that investment using the equity method accounting in accordance with IAS 28 ‘Investment in Associates and Joint Ventures’ (refer to Note 3.(3)), except when the Company is applicable to the IFRS 5 ‘Non-current (5) Non-current Non-current non-current When the Company is committed to a sale plan involving loss of control of a subsidiary, all of the assets and liabilities of that subsidiary are classified as held for sale when the criteria described above are met, regardless of whether the Company will retain a non-controlling Non-current (6) Goodwill The Company measures goodwill which acquired in a business combination at the amount recognized at the date on which it obtains control of the acquiree (acquisition date) less any accumulated impairment losses. Goodwill acquired in a business combination is allocated to each cash-generating unit (CGU) that is expected to benefit from the synergies arising from the business acquired. The Company assesses at the end of each reporting period and whenever there is an indication that the asset may be impaired. An impairment loss is recognized if the carrying amount of an asset or a CGU exceeds its recoverable amount. Impairment losses are recognized in profit or loss. Any impairment identified at the CGU level will first reduce the carrying value of goodwill and then be used to reduce the carrying amount of the other assets in the CGU on a pro rata basis. Except for impairment losses in respect of goodwill which are never reversed, an impairment loss is reversed if there has been a change in the estimates used to determine the recoverable amount. An impairment loss is reversed only to the extent that the asset’s carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized. On disposal of the relevant CGU, the amount of goodwill is included in the determination of the gain or loss on disposal. (7) Revenue from Contracts with Customers The Company recognizes revenue by applying the five-step approach (Step 1: Identify the contract(s) with a customer, Step 2: Identify the performance obligations in the contract, Step 3: Determine the transaction price, Step 4: Allocate the transaction price to the performance obligations in the contract, Step 5: Recognize revenue when the entity satisfied a performance obligation). The Company recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, excluding amounts collected on behalf of third parties. Also, the Company recognizes revenue when the Company satisfies a performance obligation by transferring a promised good or service to a customer. (i) Sale of goods The Company sells electricity to customers and accounts for the generation, transmission and distribution of electricity together as a single performance obligation. The sale of electricity is recognized at a point in time when electricity has been distributed to the customer. The transaction price includes variable consideration due to the progressive electricity billing system, discounts on electricity bills for government policy purposes and penalties. In situations where electricity had been delivered but not yet billed, the Company also estimates the volume of electricity delivered which can vary significantly as a result of customer usage patterns, customer mix, meter reading schedules, weather, etc. Variable consideration is estimated by using the expected value method which predicts the amount of consideration to which the Company will be entitled and is recognized only to the extent that it is highly probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved which is when the customer is billed. (ii) Sale of construction services The Company provides power plant construction and EPC services which are each identified as a single performance obligation and is recognized over time on the estimated progress to completion using the cost-based input method. The Company believes using the cost-based input method represents a faithful depiction of the transfer of services to the customer. Cost incurred towards contract completion include costs associated with direct materials, labor, and other indirect costs related to contract performance. Judgment is required in estimating the costs expected to incur in completing the construction projects which involves estimating future materials, labor, contingencies and other related costs. Revenue is estimated based on the contractual amount; however it can also be affected by uncertainties resulting from unexpected future events. Revenue may be recognized in advance of billing the customer which results in the recording of a contract asset. Once the Company meets the billing criteria and its rights to consideration become unconditional, the contract asset is then transferred to trade receivable. Billing requirements are generally structured around the completion of certain construction milestones. On some instances, contract liability is recognized when the Company receives consideration before being able to recognize revenue. Once revenue recognition conditions are met, the contract liability is subsequently released to revenue. (iii) Sale of services The Company develops electric power resources including the provision of power generation byproducts and O&M services which are accounted for as a separate performance obligation under each contract. The Company recognizes revenue over time when customers consume the benefits provided by the Company under the terms of the service agreement. (iv) Adoption of the cost pass-through tariff system The Company amended the basic supply terms and conditions with the approval of the Ministry of Trade, Industry and Energy (MOTIE) on December 17, 2020. The cost pass-through tariff system has been applied to the electricity rate after January 1, 2021 in accordance with the amendment. The Company expects the adoption of the new system would not affect the existing accounting policies including ‘revenue from contracts with customers’. (8) Deferred Revenue The Company receives consideration in the form of an item of property, equipment or cash for constructing or acquiring an item of property or equipment in non-current non-financial (9) Leases The lessee and the lessor account for each lease component separately from non-lease However non-lease non-lease (i) The Company as a lessor In the case of finance leases, the Company recognizes the same amount of the net investment in the lease as finance lease receivables and recognizes interest income using the effective interest rate method. Income from operating leases is recognized using the straight-line basis over the lease term, and lease opening direct costs incurred during the negotiation and contract phase of the operating lease contract are added to the carrying amount of the lease asset and recognized as expenses over the lease term on a straight-line basis. (ii) The Company as a lessee (a) Right-of-use The Company recognizes right-of-use Right-of-use re-measurement right-of-use made at or before the commencement date less any lease incentives received. Unless the Company is reasonably certain to obtain ownership of the leased asset at the end of the lease term, the recognized right-of-use Right-of-use (b) Lease liabilities At the commencement date of the lease, the Company recognizes lease liabilities measured at the present value of lease payments to be made over the lease term. The lease payments include fixed payments (including in-substance In calculating the present value of lease payments, the Company uses its incremental borrowing rate at the lease commencement date if the interest rate implicit in the lease is not readily determinable. After the commencement date, the amount of lease liabilities is increased to reflect the accretion of interest and reduced for the lease payments made. In addition, the carrying amount of lease liabilities is remeasured if there is a modification, a change in the lease term, a change in the in-substance (c) Short-term leases and leases of low-value The Company applies the short-term leases recognition exemption to its short-term leases of machinery and equipment (i.e., those leases that have a lease term of 12 months or less from the commencement date and do not contain a purchase option). It also applies the leases of low-value low-value Book value and changes in book value of right-of-use (10) Foreign currencies Transactions in foreign currencies are translated to the respective functional currencies of the Company entities at exchange rates at the dates of the transactions. Monetary items in foreign currencies are retranslated to the functional currency using the reporting date’s exchange rate. Non-monetary Exchange differences are recognized in profit or loss in the period in which they arise except for: • Exchange differences on foreign currency borrowings relating to assets under construction for future productive use, which are included in the cost of those assets when they are regarded as an adjustment to interest costs on those foreign currency borrowings; • Exchange differences on transactions entered into in order to hedge certain foreign currency risks (refer to note 3.(24) • Derivative financial instruments, including hedge accounting); and • Exchange differences on monetary items receivable from or payable to a foreign operation for which settlement is neither planned nor likely to occur (therefore forming part of the net investment in the foreign operation), which are recognized initially in other comprehensive income and reclassified from equity to profit or loss on disposal or partial disposal of the net investment. For the purpose of presenting financial statements, the assets and liabilities of the Company’s foreign operations are expressed in Korean won using exchange rates prevailing at the end of the reporting period. Income and expense items are translated at the average exchange rates for the period, unless exchange rates fluctuated significantly during that period, in which case the exchange rates at the dates of the transactions are used. Exchange differences arising, if any, are recognized in other comprehensive income and accumulated in equity (if applicable, in non-controlling On the disposal of a foreign operation, the cumulative amount of the exchange differences relating to that foreign operation that have been attributed to the controlling interests shall be reclassified from equity to profit or loss (as a reclassification adjustment). The cumulative amount of the exchange differences relating to that foreign operation that have been attributed to the non-controlling On the partial disposal of a subsidiary that includes a foreign operation, the entity shall re-attribute non-controlling Any goodwill arising on the acquisition of a foreign operation and any fair value adjustments to the carrying amounts of assets and liabilities arising on the acquisition of that foreign operation shall be treated as assets and liabilities of the foreign operation. Thus they shall be expressed in the functional currency of the foreign operation and shall be translated at the closing rate. Such exchange differences shall be recognized in equity. (11) Borrowing costs The Company capitalizes borrowing costs directly attributable to the acquisition, construction or production of a qualifying asset as part of the cost of that asset. Other borrowing costs are recognized in expense as incurred. A qualifying asset is an asset that requires a substantial period of time to get ready for its intended use or sale. Investment income earned on the temporary investment of specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. All other borrowing costs are recognized in profit or loss in the period in which they are incurred. (12) Government grants Government grants are not recognized unless there is reasonable assurance that the Company will comply with the grant’s conditions and that the grant will be received. Benefit from a government loan at a below-market interest rate is treated as a government grant, measured as the difference between proceeds received and the fair value of the loan based on prevailing market interest rates. (i) If the Company received grants related to assets, government grants whose primary condition is that the Company purchases, constructs or otherwise acquires long-term assets are deducted in calculating the carrying amount of the asset. The grant is recognized in profit or loss over the life of a depreciable asset as a reduced depreciation expense. (ii) If the Company received grants related to expenses, government grants which are intended to compensate the Company for expenses incurred are recognized as other income (government grants) in profit or loss over the periods in which the Company recognizes the related costs as expenses. (13) Employee benefits When an employee has rendered service to the Company during a period, the Company recognizes the contribution payable to a defined contribution plan in exchange for that service as a liability (accrued expense). For defined benefit pension plans and other post-employment benefits, the net periodic pension expense is actuarially determined by “Pension Actuarial System” developed by independent actuaries using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity approximating the terms of the related pension liability. However, if there is not a deep market, market yields on government bonds are used. Net defined benefit liability’s measurement is composed of actuarial gains and losses, return on plan assets excluding net interest on net defined benefit liability, and any change in the effect of the asset ceiling, excluding net interest, which are immediately recognized in other comprehensive income. The actuarial gains or losses recognized in other comprehensive income which will not be reclassified into net profit or loss for later periods are immediately recognized in retained earnings. Past service cost will be recognized as expenses upon the earlier of the date of change or reduction to the plan, or the date of recognizing termination benefits. The retirement benefit obligation recognized in the consolidated statement of financial position represents the present value of the defined benefit obligation as adjusted for unrecognized actuarial gains and losses and unrecognized past service cost, and as reduced by the fair value of plan assets. Any asset resulting from this calculation is limited to unrecognized actuarial losses and past service cost, plus the present value of available refunds and reductions in future contributions to the plan. (14) Income taxes Income tax expense comprises current and deferred tax. Current tax and deferred tax are recognized in profit or loss except to the extent that it relates to a business combination, or items recognized directly in equity or in other comprehensive income. (i) Current tax Current tax is the expected tax payable or receivable on the taxable profit or loss for the year, using tax rates enacted or substantively enacted at the end of the reporting period and any adjustment to tax payable in respect of previous years. The taxable profit is different from the accounting profit for the period since the taxable profit is calculated excluding the temporary differences, which will be taxable or deductible in determining taxable profit (tax loss) of future periods, and non-taxable non-deductible Current tax assets and liabilities are offset only if, the Company (a) has a legally enforceable right to set off the recognized amounts; and (b) intends either to settle on a net basis, or to realize the asset and settle the liability simultaneously. (ii) Deferred tax Deferred tax is recognized, using the asset-liability method, in respect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. A deferred tax liability is recognized for all taxable temporary differences. A deferred tax asset is recognized for all deductible temporary differences to the extent that it is probable that taxable profit will be available against which they can be utilized. However, deferred tax is not recognized for the following temporary differences: taxable temporary differences arising on the initial recognition of goodwill, or the initial recognition of assets or liabilities in a transaction that is not a business combination and that affects neither accounting profit or loss nor taxable income. In certain circumstances such as when accounting for leases or decommissioning costs of nuclear power plants, the carrying amount of the asset recorded is equal to the liability recognized at initial recognition. When recording its deferred tax balances, the Company considers these assets and liabilities separately on a gross basis. Accordingly, the taxable temporary difference relating to the asset and the deductible temporary difference relating to the liability are separately recognized and presented on a net basis in the consolidated financial statements. The measurement of deferred tax liabilities and deferred tax assets reflects the tax consequences that would follow from the manner in which the Company expects, at the end of the reporting period, to recover or settle the carrying amount of its assets and liabilities. Deferred tax assets or deferred tax liabilities on investment properties measured at fair value, unless any contrary evidence exists, are measured using the assumption that the carrying amount of the property will be recovered entirely through sale. The Company recognizes a deferred tax liability for all taxable temporary differences associated with investments in subsidiaries, associates, and interests in joint ventures, except to the extent that the Company is able to control the timing of the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future. The Company recognizes a deferred tax asset for all deductible temporary differences arising from investments in subsidiaries and associates, to the extent that it is probable that the temporary difference will reverse in the foreseeable future and taxable profit will be available against which the temporary difference can be utilized. The carrying amount of a deferred tax asset is reviewed at the end of each reporting period and reduces the carrying amount to the extent that it is no longer probable that sufficient taxable profit will be available to allow the benefit of part or all of that deferred tax asset to be utilized. Deferred tax assets and liabilities are measured at the tax rates that are expected to apply to the period when the asset is realized or the liability is settled, based on tax rates (and tax laws) that have been enacted or substantively enacted by the end of the reporting period. The measurement of deferred tax liabilities and deferred tax assets reflects the tax consequences that would follow from the manner in which the Company expects, at the end of the reporting period to recover or settle the carrying amount of its assets and liabilities. Deferred tax assets and liabilities are offset only if there is a legally enforceable right to offset the related current tax liabilities and assets, and they relate to income taxes levied by the same tax authority and they intend to settle current tax liabilities and assets on a net basis. (iii) Current and deferred tax for the year Current and deferred tax are recognized in profit or loss, except when they relate to items that are recognized in other comprehensive income or directly in equity, in which case, the current and deferred tax are also recognized in other comprehensive income or directly in equity respectively. Where current tax or deferred tax arises from the initial accounting for a business combination, the tax effect is included in the accounting for the business combination. (15) Property, plant and equipment Property, plant and equipment are initially measured at cost and after initial recognition, are carried at cost less accumulated depreciation and accumulated impairment losses. The cost of property, plant and equipment includes expenditures arising directly from the construction or acquisition of the asset, any costs directly attributable to bringing the asset to the location and condition necessary for it to be capable of operating in the manner intended by management and the initial estimate of the costs of dismantling and removing the item and restoring the site on which it is located. Subsequent costs are recognized in the carrying amount of property, plant and equipment at cost or, if ap

Segment, Geographic and Other I

Segment, Geographic and Other Information	12 Months Ended
	Dec. 31, 2023
Disclosure of operating segments [abstract]
Segment, Geographic and Other Information	4. Segment, Geographic and Other Information (1) Segment determination and explanation of the measurements The Company’s operating segments are its business components that generate discrete financial information that is reported to and regularly reviewed by chief operating decision makers of the Company including but not limited to the Chief Executive Officer, for the purpose of resource allocation and assessment of segment performance. The Company’s reportable segments are ‘Transmission and distribution’, ‘Electric power generation (Nuclear)’, ‘Electric power generation (Non-nuclear)’, Segment operating profit or loss is determined the same way that consolidated operating profit or loss is determined under IFRS without any adjustment for corporate allocations. The accounting policies used by each segment are consistent with the accounting policies used in the preparation of the consolidated financial statements. Segment assets and liabilities are determined based on separate financial statements of the entities instead of on a consolidated basis. There are various transactions between the reportable segments, including sales of property, plant and equipment and so on, that are conducted on an arm’s-length (2) Financial information of the segments for the years ended December 31, 2021, 2022 and 2023, respectively, are as follows: 2021 Segment Total segment Intersegment Revenue Depreciation Interest Interest Profit (loss) Employee Loss on Increase in Operating In millions of won Transmission and distribution ￦ 58,999,388 1,672,776 57,326,612 3,990,464 36,831 678,986 391,116 193,412 202,262 1,194,643 (7,244,319 ) Electric power generation (Nuclear) 9,324,391 9,207,516 116,875 3,611,594 22,209 477,512 (18,146 ) 86,730 —  680,358 762,164 Electric power generation (Non-nuclear) 25,928,596 24,518,167 1,410,429 4,182,470 22,226 624,391 109,765 121,020 5,672 285,152 370,440 Plant maintenance & engineering service 2,805,785 2,370,900 434,885 121,493 9,515 933 11,849 94,269 —  213,500 245,360 Others 2,018,997 1,295,423 723,574 159,222 158,680 162,345 —  52,698 —  2,981 208,139 Consolidation (39,064,782 ) (39,064,782 ) —  (122,751 ) (27,587 ) (29,710 ) —  (36,187 ) —  89,818 (64,775 ) ￦ 60,012,375 —  60,012,375 11,942,492 221,874 1,914,457 494,584 511,942 207,934 2,466,452 (5,722,991 ) Finance income 1,402,614 Finance expense (3,245,777 ) Gain related to associates, joint ventures and subsidiaries 494,584 Loss before income tax ￦ (7,071,570 ) 2022 Segment Total segment Intersegment Revenue Depreciation Interest Interest Profit (loss) Employee Loss on Increase in Operating In millions of won Transmission and distribution ￦ 68,239,707 1,922,354 66,317,353 4,130,004 67,076 1,420,802 980,146 180,114 157,784 611,534 (33,623,874 ) Electric power generation (Nuclear) 10,386,091 10,254,271 131,820 4,034,774 45,789 557,218 (753 ) 82,466 —  624,221 761,109 Electric power generation (Non-nuclear) 41,944,339 39,252,851 2,691,488 4,091,081 53,242 694,559 329,112 140,067 —  619,947 289,001 Plant maintenance & engineering service 2,975,062 2,516,699 458,363 123,168 14,003 1,405 1,886 82,070 —  213,671 239,529 Others 2,750,231 1,803,231 947,000 211,719 195,966 195,860 —  53,017 3,125 9,463 333,547 Consolidation adjustments (55,749,406 ) (55,749,406 ) —  (129,334 ) (35,323 ) (51,298 ) —  (52,034 ) —  68,143 (239,843 ) ￦ 70,546,024 —  70,546,024 12,461,412 340,753 2,818,546 1,310,391 485,700 160,909 2,146,979 (32,240,531 ) Finance income 1,833,312 Finance expense (4,746,791 ) Gain related to associates, joint ventures and subsidiaries 1,310,391 Loss before income tax ￦ (33,843,619 ) 2023 Segment Total Intersegment Revenue Depreciation Interest Interest Profit (loss) Employee Loss on Increase in Operating In millions of won Transmission and distribution ￦ 85,082,542 1,728,602 83,353,940 4,258,909 92,380 2,826,916 314,373 127,038 182,742 419,564 (6,153,936 ) Electric power generation (Nuclear) 10,798,378 10,666,260 132,118 4,403,610 69,209 687,743 (2,639 ) 62,280 —  585,630 819,838 Electric power generation (Non-nuclear) 35,159,641 32,253,979 2,905,662 4,180,939 65,403 741,282 301,681 109,151 13,863 352,058 929,210 Plant maintenance & engineering service 3,091,022 2,626,190 464,832 129,628 23,638 1,270 (389 ) 52,890 —  206,215 355,284 Others 2,175,972 1,556,114 619,858 204,322 226,243 258,877 —  48,105 92 444 89,302 Consolidation adjustments (48,831,145 ) (48,831,145 ) —  (145,145 ) (47,253 ) (64,429 ) —  (40,734 ) —  47,171 (284,714 ) ￦ 87,476,410 —  87,476,410 13,032,263 429,620 4,451,659 613,026 358,730 196,697 1,611,082 (4,245,016 ) Finance income 1,425,031 Finance expense (5,347,018 ) Gain related to associates, joint ventures and subsidiaries 613,026 Loss before income tax ￦ (7,553,977 ) (3) Information related to segment assets and segment liabilities as of and for the years ended December 31, 2022 and 2023 are as follows: 2022 Segment Segment assets Investments Acquisition of non-current Segment In millions of won Transmission and distribution ￦ 131,023,727 5,678,141 6,055,179 108,963,058 Electric power generation (Nuclear) 69,129,625 143,304 2,008,409 42,843,974 Electric power generation (Non-nuclear) 69,468,039 3,113,918 3,547,815 40,428,907 Plant maintenance & engineering service 4,051,157 56,685 200,338 1,272,408 Others 12,895,981 —  839,885 5,796,718 Segment totals 286,568,529 8,992,048 12,651,626 199,305,065 Consolidation adjustments: Elimination of inter-segment amounts (43,801,723 ) —  (38,633 ) (9,304,648 ) Equity method adjustment 2,859,623 —  —  —  Deferred taxes (452 ) —  —  2,801,832 Others (10,820,983 ) —  —  2,489 (51,763,535 ) —  (38,633 ) (6,500,327 ) Consolidated totals ￦ 234,804,994 8,992,048 12,612,993 192,804,738 2023 Segment Segment assets Investments Acquisition of non-current Segment In millions of won Transmission and distribution ￦ 138,838,342 5,872,000 7,636,677 120,181,250 Electric power generation (Nuclear) 70,535,018 169,155 3,070,528 45,660,916 Electric power generation (Non-nuclear) 66,265,884 3,567,345 3,490,863 38,415,202 Plant maintenance & engineering service 4,271,409 54,088 203,352 1,549,863 Others 13,378,229 —  736,155 6,480,959 Segment totals 293,288,882 9,662,588 15,137,575 212,288,190 Consolidation adjustments: Elimination of inter-segment amounts (46,071,077 ) —  (390,686 ) (11,463,805 ) Equity method adjustment 2,997,016 —  —  —  Deferred taxes 1,636 —  —  1,629,280 Others (10,501,492 ) —  —  (3,450 ) (53,573,917 ) —  (390,686 ) (9,837,975 ) Consolidated totals ￦ 239,714,965 9,662,588 14,746,889 202,450,215 (4) Geographic information Electricity sales, the main operations of the Company, are conducted in the Republic of Korea. The following information on revenue from external customers and non-current assets is determined by the location of the customers and of the assets: Revenue from external customers Non-current assets (*2) Geographical unit 2021 2022 2023 2021 2022 2023 In millions of won Domestic ￦ 58,771,252 69,142,730 86,242,808 178,760,564 183,707,117 186,384,115 Overseas (*1) 1,241,123 1,403,294 1,233,602 3,572,784 4,724,416 4,822,845 ￦ 60,012,375 70,546,024 87,476,410 182,333,348 188,431,533 191,206,960 (*1) Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current asse (*2) The amounts exclude financial assets and deferred tax assets. (5) Information on significant customers There is no single customer which accounts for 10% or more of the Company’s revenue for the years ended December 31, 2021, 2022 and 2023.

Classification of Financial Ins

Classification of Financial Instruments	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about financial instruments [abstract]
Classification of Financial Instruments	5. Classification of Financial Instruments (1) Classification of financial assets as of December 31, 2022 and 2023 are as follows: 2022 Financial assets Financial assets Financial assets Derivative assets Total In millions of won Current assets Cash and cash equivalents ￦ —  —  3,234,780 —  3,234,780 Current financial assets Current financial assets at fair value through profit or loss 3,181,791 —  —  —  3,181,791 Current financial assets at amortized costs —  —  16,762 —  16,762 Current derivative assets 154,730 —  —  134,873 289,603 Other financial assets —  —  798,819 —  798,819 Trade and other receivables —  —  10,461,822 —  10,461,822 3,336,521 —  14,512,183 134,873 17,983,577 Non-current assets Non-current financial assets Non-current financial assets at fair value through profit or loss 527,717 —  —  —  527,717 Non-current financial assets at fair value through other comprehensive income —  502,829 —  —  502,829 Non-current financial assets at amortized costs —  —  10,236 —  10,236 Non-current derivative assets 538,342 —  —  190,079 728,421 Other financial assets —  —  1,567,632 —  1,567,632 Trade and other receivables —  —  2,153,080 —  2,153,080 1,066,059 502,829 3,730,948 190,079 5,489,915 ￦ 4,402,580 502,829 18,243,131 324,952 23,473,492 2023 Financial assets Financial assets Financial assets Derivative assets Total In millions of won Current assets Cash and cash equivalents ￦ —  —  4,342,887 —  4,342,887 Current financial assets Current financial assets at fair value through profit or loss 2,054,021 —  —  —  2,054,021 Current financial assets at amortized costs —  —  28,905 —  28,905 Current derivative assets 227,434 —  —  80,298 307,732 Other financial assets —  —  716,739 —  716,739 Trade and other receivables —  —  11,985,735 —  11,985,735 2,281,455 —  17,074,266 80,298 19,436,019 Non-current Non-current Non-current 657,264 —  —  —  657,264 Non-current —  502,443 —  —  502,443 Non-current —  —  9,938 —  9,938 Non-current 503,514 —  —  189,148 692,662 Other financial assets —  —  1,683,907 —  1,683,907 Trade and other receivables —  —  2,193,587 —  2,193,587 1,160,778 502,443 3,887,432 189,148 5,739,801 ￦ 3,442,233 502,443 20,961,698 269,446 25,175,820 (2) Classification of financial liabilities as of December 31, 2022 and 2023 are as follows: 2022 Financial liabilities at fair value through profit or loss Financial liabilities Derivative liabilities Total In millions of won Current liabilities Borrowings ￦ —  12,457,853 —  12,457,853 Debt securities —  10,201,149 —  10,201,149 Derivative liabilities 44,994 —  —  44,994 Trade and other payables —  11,983,549 —  11,983,549 44,994 34,642,551 —  34,687,545 Non-current liabilities Borrowings —  2,962,323 —  2,962,323 Debt securities —  94,984,040 —  94,984,040 Derivative liabilities 362,252 —  25,505 387,757 Trade and other payables —  5,638,914 —  5,638,914 362,252 103,585,277 25,505 103,973,034 ￦ 407,246 138,227,828 25,505 138,660,579 2023 Financial liabilities at fair value through profit or loss Financial liabilities Derivative liabilities Total In millions of won Current liabilities Borrowings ￦ —  16,446,821 —  16,446,821 Debt securities —  24,674,526 —  24,674,526 Derivative liabilities 18,379 —  —  18,379 Trade and other payables —  9,089,973 —  9,089,973 18,379 50,211,320 —  50,229,699 Non-current Borrowings —  3,392,831 —  3,392,831 Debt securities —  89,117,652 —  89,117,652 Derivative liabilities 410,291 —  23,564 433,855 Trade and other payables —  4,981,957 —  4,981,957 410,291 97,492,440 23,564 97,926,295 ￦ 428,670 147,703,760 23,564 148,155,994 (3) Classification of comprehensive income (loss) from financial instruments for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Cash and cash equivalents Interest income ￦ 12,692 51,872 100,205 Gain (loss) on foreign currency transactions and translations 34,923 22,158 (2,073 ) Financial assets at fair value through profit or loss Interest income 18,415 58,540 65,470 Dividends income 2,949 1,994 4,193 Gain (loss) on valuation of derivatives 450,896 336,049 144,797 Gain (loss) on transaction of derivatives 54,352 205,298 130,230 Gain (loss) on valuation of financial assets 8,858 (37,230 ) 128,307 Gain (loss) on disposal of financial assets 4,221 9,358 13,161 Financial assets at fair value through other comprehensive income Dividends income 7,573 26,881 21,748 Financial assets at amortized cost Interest income 797 1,308 2,929 Gain (loss) on foreign currency transactions and translations (3,647 ) 5,087 (1,774 ) Loans Interest income 25,196 33,545 44,029 Gain (loss) on foreign currency transactions and translations 729 596 127 Trade and other receivables Interest income 144,543 164,653 168,303 Gain (loss) on disposal of financial assets 2,452 —  —  Gain (loss) on foreign currency transactions and translations 14,207 1,019 27,363 Short-term financial instruments Interest income 7,531 15,827 34,260 Gain (loss) on foreign currency transactions and translations 32,218 3,513 —  Long-term financial instruments Interest income 12,470 14,371 14,183 Gain (loss) on foreign currency transactions and translations 27 1 —  Other financial assets Interest income 230 637 241 Derivatives (applying hedge accounting) Gain (loss) on valuation of derivatives (profit or loss) 211,180 149,888 76,814 Gain (loss) on valuation of derivatives (equity, before tax) (11,734 ) (93,699 ) (10,539 ) Gain (loss) on transaction of derivatives 31,351 54,422 19,604 Financial liabilities at fair value through profit or loss Gain (loss) on valuation of derivatives 2,751 (345,313 ) 961 Gain (loss) on transaction of derivatives (15,358 ) (110,236 ) (80,640 ) Financial liabilities carried at amortized cost Interest expense of borrowings and debt securities 1,316,269 2,142,220 3,636,887 Gain (loss) on repayment of financial liabilities (10 ) (15 ) —  Interest expense of trade and other payables 213,765 204,078 200,440 Interest expense of others 384,423 472,248 614,332 Other finance income 1,284 927 4,971 Other finance expenses 2,504 167 1,796 Gain (loss) on foreign currency transactions and translations (1,162,835 ) (936,269 ) (420,203 ) Derivatives (applying hedge accounting) Gain (loss) on valuation of derivatives (profit or loss) 158,167 83,594 11,627 Gain (loss) on valuation of derivatives (equity, before tax) (28,726 ) 28,647 2,021 Gain (loss) on transaction of derivatives 13,737 75,201 20,465

Restricted Deposits

Restricted Deposits	12 Months Ended
	Dec. 31, 2023
Restricted Deposits [Abstract]
Restricted Deposits	6. Restricted Deposits Restricted deposits as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Cash and cash equivalents Escrow accounts ￦ 2,912 3,010 Deposits for government project and others 30,586 26,969 Collateral provided for borrowings 250,346 190,525 Collateral provided for lawsuit 57 54 Deposits for transmission regional support program 8,626 9,481 Deposits for other business purposes 3,825 5,550 Short-term financial instruments Restriction on withdrawal related to ‘win-win growth program’ for small and medium enterprises and others 101,500 80,500 Collateral provided for borrowings 1,000 24,728 Non-current financial assets at fair value through profit or loss Decommissioning costs of nuclear power plants 386,220 271,047 Long-term financial instruments Escrow accounts 1,603 —  Guarantee deposits for banking accounts at oversea branches 18 36 Collateral provided for borrowings 21,745 28,245 Decommissioning costs of nuclear power plants 497,609 655,030 Other non-current assets Deposits for other business purposes 4,355 7,558 ￦ 1,310,402 1,302,733

Cash and Cash Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2023
Cash and cash equivalents [abstract]
Cash and Cash Equivalents	7. Cash and Cash Equivalents Cash and cash equivalents as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Cash ￦ 21,113 14,070 Other demand deposits 1,906,248 1,780,548 Short-term deposits classified as cash equivalents 1,063,290 1,107,687 Short-term investments classified as cash equivalents 244,129 1,440,582 ￦ 3,234,780 4,342,887

Trade and Other Receivables

Trade and Other Receivables	12 Months Ended
	Dec. 31, 2023
Trade and other receivables [abstract]
Trade and Other Receivables	8. Trade and Other Receivables (1) Trade and other receivables as of December 31, 2022 and 2023 are as follows: 2022 Gross Allowance for doubtful accounts Present value discount Book In millions of won Current assets Trade receivables ￦ 9,700,880 (196,829 ) —  9,504,051 Other receivables 1,004,528 (44,388 ) (2,369 ) 957,771 10,705,408 (241,217 ) (2,369 ) 10,461,822 Non-current assets Trade receivables 197,955 (2,171 ) —  195,784 Other receivables 2,033,705 (65,065 ) (11,344 ) 1,957,296 2,231,660 (67,236 ) (11,344 ) 2,153,080 ￦ 12,937,068 (308,453 ) (13,713 ) 12,614,902 2023 Gross Allowance for doubtful accounts Present value discount Book In millions of won Current assets Trade receivables ￦ 11,239,601 (230,058 ) —  11,009,543 Other receivables 1,034,655 (53,683 ) (4,780 ) 976,192 12,274,256 (283,741 ) (4,780 ) 11,985,735 Non-current assets Trade receivables 207,668 (2,587 ) —  205,081 Other receivables 2,080,830 (80,270 ) (12,054 ) 1,988,506 2,288,498 (82,857 ) (12,054 ) 2,193,587 ￦ 14,562,754 (366,598 ) (16,834 ) 14,179,322 (2) Other receivables as of December 31, 2022 and 2023 are as follows: 2022 Gross Allowance for doubtful accounts Present value Book In millions of won Current assets Non-trade receivables ￦ 459,245 (41,293 ) (21 ) 417,931 Accrued income 109,267 —  —  109,267 Deposits 289,580 —  (2,348 ) 287,232 Finance lease receivables (*1) 67,583 (1,802 ) —  65,781 Others 78,853 (1,293 ) —  77,560 1,004,528 (44,388 ) (2,369 ) 957,771 Non-current assets Non-trade receivables 140,128 (52,696 ) (182 ) 87,250 Accrued income 2,004 —  —  2,004 Deposits 459,861 —  (11,162 ) 448,699 Finance lease receivables (*2) 1,171,807 (2,703 ) —  1,169,104 Others 259,905 (9,666 ) —  250,239 2,033,705 (65,065 ) (11,344 ) 1,957,296 ￦ 3,038,233 (109,453 ) (13,713 ) 2,915,067 (*1)  Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦114,347 million. (*2)  Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦1,024,927 million.       2023 Gross Allowance for doubtful accounts Present value Book In millions of won Current assets Non-trade receivables ￦ 393,859 (49,626 ) (53 ) 344,180 Accrued income 133,033 —  —  133,033 Deposits 317,541 (4 ) (4,727 ) 312,810 Finance lease receivables (*1) 75,661 (2,761 ) —  72,900 Others 114,561 (1,292 ) —  113,269 1,034,655 (53,683 ) (4,780 ) 976,192 Non-current assets Non-trade receivables 198,453 (54,182 ) (102 ) 144,169 Accrued income 7,342 —  —  7,342 Deposits 441,721 (263 ) (11,952 ) 429,506 Finance lease receivables (*2) 1,173,500 (2,495 ) —  1,171,005 Others 259,814 (23,330 ) —  236,484 2,080,830 (80,270 ) (12,054 ) 1,988,506 ￦ 3,115,485 (133,953 ) (16,834 ) 2,964,698 (*1) Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦114,118 million. (*2) Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦943,316 million. (3) Trade and other receivables are classified as financial assets at amortized cost and are measured using the effective interest rate method. No interest is accrued for trade receivables related to electricity for the duration between the billing date and the payment due dates. However once trade receivables are overdue, the Company imposes a monthly interest rate of 1.5% on the overdue trade receivables. The Company holds deposits of three months’ expected electricity usage for customers requesting temporary usage and customers with delinquent payments. (4) Aging analysis of trade receivables as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Trade receivables: (not overdue) ￦ 9,509,775 11,120,582 Trade receivables: (impairment reviewed) 389,060 326,687 Less than 60 days 5,592 6,403 60 ~ 90 days 36,389 55,802 90 ~ 120 days 31,442 20,535 120 days ~ 1 year 99,655 58,350 Over 1 year 215,982 185,597 9,898,835 11,447,269 Less: allowance for doubtful accounts (199,000 ) (232,645 ) ￦ 9,699,835 11,214,624 At the end of each reporting period, the Company assesses whether the credit to trade receivables is impaired. The Company recognizes loss allowances for trade receivables individually when there is any objective evidence that trade receivables are impaired and significant and classifies the trade receivables that are not individually assessed as the trade receivables subject to be assessed on a collective basis. Also, the Company recognizes loss allowances based on an ‘expected credit loss’ (ECL) model. (5) Aging analysis of other receivables as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Other receivables: (not overdue) ￦ 2,857,253 2,857,337 Other receivables: (impairment reviewed) 180,980 258,148 Less than 60 days 92 5 60 ~ 90 days 13,643 27,634 90 ~ 120 days 2,982 727 120 days ~ 1 year 18,494 69,651 Over 1 year 145,769 160,131 3,038,233 3,115,485 Less: allowance for doubtful accounts (109,453 ) (133,953 ) Less: present value discount (13,713 ) (16,834 ) ￦ 2,915,067 2,964,698 At the end of each reporting period, the Company assesses whether the credit to other receivables is impaired. The Company recognizes loss allowances for other receivables individually when there is any objective evidence that other receivables are impaired and significant, and classifies the other receivables that are not individually assessed as the other receivables subject to be assessed on a collective basis. Also, the Company recognizes loss allowances based on an ‘expected credit loss’ (ECL) model. (6) Changes in the allowance for doubtful accounts for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 Trade Other Trade Other Trade Other In millions of won Beginning balance ￦ 208,990 132,379 205,339 82,710 199,000 109,453 Bad debt expense 19,039 18,411 27,078 4,220 68,385 24,290 Write-off (21,809 ) (58,762 ) (26,319 ) (1,103 ) (26,109 ) (4,472 ) Reversal (1,071 ) (79 ) (3,444 ) (37 ) (5,577 ) (1,942 ) Others 190 (9,239 ) (3,654 ) 23,663 (3,054 ) 6,624 Ending balance ￦ 205,339 82,710 199,000 109,453 232,645 133,953

Financial Assets at Fair Value

Financial Assets at Fair Value through Profit or Loss	12 Months Ended
	Dec. 31, 2023
Financial assets at fair value through profit or loss [abstract]
Financial Assets at Fair Value through Profit or Loss	9. Financial Assets at Fair Value through Profit or Loss (1) Financial assets at fair value through profit or loss as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Financial assets at fair value through profit or loss Beneficiary Certificate ￦ 294 121,406 130,363 107,252 Cooperative —  6,329 —  6,735 Others (*) 3,181,497 173,386 1,923,658 376,602 3,181,791 301,121 2,054,021 490,589 Financial assets designated as at fair value through profit or loss Debt with embedded derivatives —  226,596 —  166,675 ￦ 3,181,791 527,717 2,054,021 657,264 (*) ‘Other’ includes MMT which is composed of government bonds, RP(Repurchase Paper), CP(Commercial Paper), etc. (2) Details of income (loss) from financial assets at fair value through profit or loss for the years ended December 31, 2022 and 2023 are as f ollows: 2022 2023 In millions of won Beneficiary Certificate ￦ 4,527 (59 ) Cooperative 120 272 Debt with embedded derivatives 946 2,934 Others 27,068 207,984 ￦ 32,661 211,131

Financial Assets at Fair Valu_2

Financial Assets at Fair Value through Other Comprehensive Income	12 Months Ended
	Dec. 31, 2023
Financial assets at fair value through other comprehensive income [abstract]
Financial Assets at Fair Value through Other Comprehensive Income	10. Financial Assets at Fair Value through Other Comprehensive Income (1) Changes in financial assets at fair value through other comprehensive income for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisition Disposal Valuation Others Ending balance In millions of won Equity securities Listed ￦ 273,826 —  —  28,585 (2,354 ) 300,057 Unlisted 160,790 9,451 —  33,237 (1,235 ) 202,243 434,616 9,451 —  61,822 (3,589 ) 502,300 Debt securities Corporate bond 491 —  —  38 —  529 435,107 9,451 —  61,860 (3,589 ) 502,829 Current financial assets at fair value through other comprehensive income ￦ —  —  —  —  —  —  Non-current financial assets at fair value through other comprehensive income 435,107 9,451 —  61,860 (3,589 ) 502,829 2023 Beginning Acquisition Disposal Valuation Others Ending balance In millions of won Equity securities Listed ￦ 300,057 430 —  (15,433 ) —  285,054 Unlisted 202,243 9,550 (5,332 ) 5,445 856 212,762 502,300 9,980 (5,332 ) (9,988 ) 856 497,816 Debt securities Corporate bond 529 4,080 —  18 —  4,627 502,829 14,060 (5,332 ) (9,970 ) 856 502,443 Current financial assets at fair value through other comprehensive income ￦ —  —  —  —  —  —  Non-current financial assets at fair value through other comprehensive income 502,829 14,060 (5,332 ) (9,970 ) 856 502,443 (2) Financial assets at fair value through other comprehensive income as of December 31, 2022 and 2023 are as follows: 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Listed Korea District Heating Corp. 2,264,068 19.55 % ￦ 173,201 64,526 64,526 KG Mobility Co., Ltd. (formerly, Ssangyong Motor Co., Ltd.) 12,205 0.03 % 428 107 107 SM Korea Line Corp. 180 0.00 % 1 —  —  Namkwang Engineering & Construction Co., Ltd. 121 0.00 % 15 —  —  Bumyang Construction Co., Ltd. 35 0.00 % 2 —  —  ELCOMTEC Co., Ltd. 32,875 0.04 % 217 34 34 PAN Ocean Co., Ltd. 1,492 0.00 % 14 9 9 STX Heavy Industries Co., Ltd. 7,419 0.03 % 107 54 54 Codes Combine Co., Ltd. 291 0.00 % 1 1 1 PT Adaro Energy Tbk. 480,000,000 1.50 % 65,028 149,503 149,503 Denison Mines Corp. 58,284,000 7.09 % 84,134 84,502 84,502 Fission Uranium Corp. 100,000 1.73 % 41 75 75 SangSangin Industry Co., Ltd. 5,831 0.01 % 38 3 3 Vitzosys Co., Ltd. 399 0.00 % 2 —  —  EMnI Co., Ltd. 628 0.00 % 25 3 3 Vissem electronics, Co., Ltd. 229 0.00 % 11 1 1 KC Industry Co., Ltd. 139 0.00 % 6 —  —  Ihsung CNI Co., Ltd. 142,860 4.81 % 1,500 1,229 1,229 Aone Alform Co., Ltd. 2,672 0.04 % 19 10 10 324,790 300,057 300,057 Unlisted Intellectual Discovery Co., Ltd. 200,000 6.00 % ￦ 5,000 954 954 Hwan Young Steel Co., Ltd. 10,916 0.14 % 1,092 97 97 SAMBO AUTO. Co., Ltd. 15,066 0.02 % 38 38 38 Mobo Co., Ltd. 504 0.00 % 14 14 14 Dae Kwang Semiconductor Co., Ltd. 589 0.07 % 6 6 6 Sanbon Department Store 828 0.01 % 124 3 3 Miju Steel Mfg. Co., Ltd. 1,097 0.23 % 50 50 50 Sungwon Co., Ltd. 117 0.07 % 29 29 29 IMHWA Corp. 329 0.11 % 5 5 5 DALIM Special Vehicle Co., Ltd. 58 0.08 % 10 10 10 Altron Jeonju Co., Ltd. 34,846 1.34 % 697 5 5 Moonkyung Silica Co., Ltd. 42 0.56 % —  —  —  Sungkwang Timber Co., Ltd. 3 0.08 % 5 5 5 KS Remicon Co., Ltd. 12 0.04 % 3 3 3 Joongang Platec Co., Ltd. 3,591 0.75 % 72 35 35 Pyungsan SI Co., Ltd. 434 0.01 % 4 4 4 Samgong Development Co., Ltd. 12 0.01 % 7 7 7 Joongang Development Co., Ltd. 540 0.12 % 8 8 8 Newasia Co., Ltd. (formerly, AJS Co., Ltd.) 12,906 0.23 % 32 32 32 MSE Co., Ltd. 429 0.13 % 9 9 9 Ilrim Nano Tec Co., Ltd. 1,520 0.07 % 15 15 15 Ilsuk Co., Ltd. 152 0.17 % 10 10 10 Zyle Daewoo Motor Sales Co., Ltd. 22 0.00 % —  —  —  Daewoo Development Co., Ltd. 8 0.00 % —  —  —  Seyang Inc. 537 0.05 % 27 30 30 Seungri Enterprise Co., Ltd. 93 0.05 % 3 3 3 Shin-E P&C Co., Ltd. 1,569 0.64 % 110 2 2 Ejung Ad Co., Ltd. 132 0.09 % 3 3 3 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Solvus Co., Ltd. 1,056 0.04 % ￦ 3 3 3 Myung Co., Ltd. 89 0.05 % 2 2 2 Biwang Industry Co., Ltd. 406 0.04 % 2 2 2 Young Sung Co., Ltd. 89 0.40 % 26 26 26 Yuil Industrial Electronics Co., Ltd. 804 0.32 % 15 15 15 Woojin Industry Corporation 3 0.00 % 16 16 16 Kwang Sung Industry Co., Ltd. 325 0.35 % 7 7 7 Futech Mold Co., Ltd. 274 0.27 % 14 14 14 Woojoo Environment Ind. Co., Ltd. 101 0.11 % 13 13 13 Hyungji Esquire Co., Ltd. 61 0.02 % 22 22 22 Morado Co., Ltd. 209 0.04 % 2 2 2 Myung Sung Tex Co., Ltd. 20 0.00 % 2 2 2 Kwang Sung Co., Ltd. 610 0.53 % 31 31 31 Seen Business and Technology Co., Ltd. 29,424 0.73 % 148 7 7 Woobang Construction Co., Ltd. 8 0.00 % 8 8 8 Shin Pyung Co., Ltd. 6 0.03 % 3 3 3 JMC Heavy Industries Co., Ltd. 2,724 0.10 % 27 2 2 Najin Steel Co., Ltd. 37 0.06 % 5 5 5 Sinkwang Industry Co., Ltd. 1,091 1.68 % 5 5 5 Elephant & Friends Co., Ltd. 563 0.61 % 3 3 3 Mireco Co., Ltd. 109 0.25 % 11 11 11 L&K Industry Co., Ltd. 1,615 0.60 % 24 24 24 JO Tech Co., Ltd. 1,263 0.62 % 25 25 25 Kendae Printing Co., Ltd. 422 0.60 % 21 21 21 Dauning Co., Ltd. 231 0.41 % 6 6 6 Korea Trecision Co., Ltd. 22 0.45 % 5 5 5 Hurim Biocell Co., Ltd. 1,021 0.00 % 5 5 5 Smart Power Co., Ltd. 133,333 4.14 % 200 200 200 Sunjin Power Tech Co., Ltd. 4,941 0.92 % 247 32 32 Beer Yeast Korea Inc. 1,388 0.43 % 7 7 7 B CON Co., Ltd. 96 1.16 % 6 6 6 Ace Integration Co., Ltd. 105 0.09 % 24 24 24 AceInti Agricultural Co., Ltd. 16 0.02 % 5 5 5 KyungDong Co., Ltd. 130 0.01 % 1 1 1 ChunWon Development Co., Ltd. 193 0.19 % 39 39 39 SungLim Industrial Co., Ltd. 29 0.03 % 1 1 1 Korea Minerals Co., Ltd. 191 0.05 % 134 1 1 HyoDong Development Co., Ltd. 128 0.16 % 25 1 1 JoHyun Co., Ltd. 350 1.56 % 18 18 18 KC Co., Ltd. 5,107 0.17 % 26 26 26 SeongJi Industrial Co., Ltd. 41 0.05 % 1 1 1 Seyang Precision Ind.Co., Ltd. 829 0.23 % 41 41 41 Dooriwon Food System Co., Ltd. 13 0.27 % 1 1 1 Sung Kwang Co., Ltd. 23 0.37 % 6 6 6 Shinheung petrol. Co., Ltd. 699 0.14 % 35 35 35 Force TEC Co., Ltd. 3,501 0.02 % 18 18 18 Samsung Tech Co., Ltd. 486 1.28 % 97 36 36 Younil Metal Co., Ltd. 41 0.21 % 21 21 21 Sevenvalley JC (formerly, CJ Paradise Co., Ltd.) 24 0.02 % 12 12 12 Han Young Technology Company Co., Ltd. 35 0.00 % —  —  —  2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Ptotronics Co., Ltd. 843 0.42 % ￦ 84 6 6 NFT Co., Ltd. 136 0.40 % 8 8 8 Hyundaitech Co., Ltd. 1,363 0.87 % 27 27 27 Dasan Material Co., Ltd. 29 0.04 % 22 22 22 Fish World Co., Ltd. 47 0.21 % 2 2 2 SG Shinsung Engineering and Construction Co., Ltd. 10 0.00 % 6 —  —  Samdo Industry Electric Co., Ltd. 48 0.02 % 1 1 1 Taejung Industries Co., Ltd. 9,268 0.30 % 5 5 5 Shinsei Trading Co., Ltd. 64 0.72 % 6 6 6 Dynamic Co., Ltd. 111 0.19 % 3 3 3 Green Alchemy Co., Ltd. 38,202 1.48 % 191 17 17 Youone TBM Engineering & Construction Co., Ltd. 615 0.27 % 31 31 31 KM Leatech Co., Ltd. 1,648 0.98 % 8 8 8 Semist Co., Ltd. 555 0.80 % 3 3 3 Sewon Bus Co., Ltd 12 0.00 % —  —  —  Enertec Co., Ltd. 7,937 0.19 % 44 44 44 Sangji Co., Ltd. 20 0.26 % 4 4 4 Bellie Doughnuts Co., Ltd. 169 0.19 % 10 10 10 AIRTECH Information communication Co., Ltd. 2,379 0.60 % 12 12 12 Kiscom Co., Ltd. 1,493 0.04 % 1 1 1 Set Holding (*2) 1,100,220 2.50 % 229,255 163,580 163,580 Choheung packing Co., Ltd. 61 0.13 % 12 12 12 Jaewoo Co., Ltd. 359 0.24 % 11 11 11 Wooyang HC Co., Ltd 1,375 0.01 % 159 13 13 TheYeonriji Co., Ltd. 116 0.10 % 6 6 6 Flusys Co., Ltd. 9 0.08 % 2 2 2 DongSeo Electronics Co., Ltd. 347 0.07 % 17 17 17 Daewoo Display Co., Ltd. 177 0.03 % 5 5 5 NTS Co., Ltd. 143 0.22 % 36 36 36 AID CO., Ltd. 1,212 0.57 % 36 36 36 Changwon Eco-friendly farming Corp. 3 0.01 % —  —  —  Kumo Hitech Co., Ltd. 6,697 0.53 % 100 32 32 Kyung Pyo Industry Co., Ltd. 186 0.76 % 19 19 19 Doosung Heavy Industries Co., Ltd. 53 0.06 % 5 5 5 Samjoo Hightech Co., Ltd. 522 0.08 % 3 3 3 Samkwang Chemical Co., Ltd. 204 1.27 % 51 51 51 Shinseung Chemical Industy Co., Ltd. 5 0.01 % 60 —  —  KJ Alloy Co., Ltd. 368 0.20 % 7 7 7 SM Hi-tech Co., Ltd. 22 0.39 % 22 22 22 Puruen Environment Co., Ltd. 967 1.34 % 19 19 19 Miretech Co., Ltd. 9,111 0.27 % 18 18 18 Sejin Hightech Co., Ltd. 17,980 0.16 % 18 18 18 Eun Sung Enterprise Co., Ltd. 1,131 0.72 % 17 17 17 Shinyoung Textiles Co., Ltd. 523 1.01 % 52 23 23 Ilwoo Steel Co., Ltd. 41 0.28 % 17 17 17 Dong-un Tech Co., Ltd. 1,159 6.28 % 81 34 34 Wongwang Door Corp. 575 1.00 % 29 29 29 Mansu Co., Ltd. 344 0.25 % 15 15 15 Eanskorea Co., Ltd. 39 0.05 % 2 2 2 Youngdongseafood Co., Ltd. 165 0.33 % 8 8 8 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Hyunwoo Winstar Co., Ltd. 1 0.00 % ￦ —  —  —  Sungchang Tech Co., Ltd. 159 0.31 % 19 19 19 Yuchang Industry Co., Ltd. 90 0.11 % 5 5 5 Jeongpum Co., Ltd. 322 0.35 % 16 16 16 Korea Steel Power Co., Ltd. 2,761 1.88 % 55 2 2 Amanex Co., Ltd. 10 0.02 % 9 9 9 Dae-A Leisure Co., Ltd. 23 0.00 % 4 4 4 Caffe Bene Co., Ltd. 1,908 0.03 % 9 9 9 Shinjin International Corp. 4 0.01 % 1 1 1 Jinhung Packaging Co., Ltd 4,329 3.02 % 22 22 22 Donglim Eng Co., Ltd. 26 0.11 % 3 3 3 SIP Co., Ltd. 274 0.55 % 7 7 7 Clizen Co., Ltd. 615 0.34 % 31 31 31 Daeji Product Co., Ltd. 15 0.05 % 1 —  —  SSET Co., Ltd. 181 0.30 % 18 18 18 Sewon PM Tech Co., Ltd. 963 1.11 % 48 48 48 Dawon Yuhwa Co., Ltd. 506 1.94 % 25 25 25 Ogokbaekkwa Co., Ltd. 101 0.12 % 1 1 1 Ewon materials Co., Ltd. (formerly, Shinwoo Toptech Co., Ltd.) 834 0.51 % 83 6 6 KMLC Co., Ltd. 281 0.14 % 22 22 22 Seinfood Co., Ltd. 13 0.17 % 7 7 7 TaeSung Eco-Tech. Co., Ltd. 1,368 4.55 % 34 34 34 Kukex Inc. 639 0.05 % 3 3 3 Youngshin Plus Co., Ltd. 104 0.12 % 5 5 5 Chang won Engineering Co., Ltd. 22 0.00 % 4 4 4 Samsung Silup Co., Ltd. 47 0.19 % 5 5 5 Samwon Bio Tech Co., Ltd. 390 0.25 % 6 6 6 IZU KOREA Co., Ltd. 48 0.00 % 2 2 2 Dongdo CNP Co., Ltd. 234 0.36 % 6 6 6 Dae Bang Industry Co., Ltd. 115 0.13 % 6 6 6 S.I.T. Co., Ltd 2,213 0.44 % 22 22 22 Taejin Hiech Co., Ltd. 78 0.26 % 3 3 3 Headone Co., Ltd. 69 0.12 % 7 7 7 E-Won Solutech Co., Ltd. 158 0.16 % 40 40 40 KPL Circuit Co., Ltd. 283 0.08 % 14 14 14 Road Solar Co., Ltd. 12 0.00 % —  —  —  Han Mi Flexible Co., Ltd. 143 0.20 % 43 43 43 Millennium PNT Co., Ltd. 227 0.37 % 6 6 6 GN Chem Co., Ltd. 40 0.07 % 1 1 1 Dae Myung Co., Ltd. 114 0.08 % 3 3 3 Nanomicart Co., Ltd. 176 1.06 % 35 35 35 Young San Heavy Industries Co., Ltd. 74 0.11 % 7 7 7 Samchungwon Co., Ltd. 15 0.24 % 2 2 2 Wooyang Frozen Foods Co., Ltd. 66 0.82 % 27 27 27 Nanomic Co., Ltd. 94 0.63 % 38 38 38 Samsung Nonferrous Metal Co., Ltd. 89 0.26 % 9 9 9 Daewha Fuel Pump Ind., Ltd. 83 0.05 % 10 10 10 Addies Direct Co., Ltd. 1 0.00 % —  —  —  WorldCnM Inc. 131 1.09 % 10 10 10 Superone Co., Ltd. 1,585 1.45 % 8 8 8 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Buyoung Panji Co., Ltd. 478 0.44 % ￦ 12 12 12 International Paint Korea Co., Ltd. 111 0.48 % 11 11 11 EI Lighting Co., Ltd. 358 0.36 % 18 18 18 Hightech Mnp Co., Ltd. 123 0.35 % 6 6 6 Yooseung Co., Ltd. 10 0.08 % 1 1 1 Sungkwang Co., Ltd. 48 0.35 % 2 2 2 Taeyang gasteel Co., Ltd. 8 0.02 % 1 1 1 Ajin KSB Co., Ltd. 204 0.31 % 18 18 18 Sewon Ceramic Co., Ltd. 530 1.01 % 5 5 5 Choyang Tech Co., Ltd. 465 1.01 % 23 23 23 TK Co., Ltd. 307 0.70 % 15 15 15 Arari Co., Ltd. 14 0.05 % 1 1 1 C&S Corporation Co., Ltd. 1,304 0.01 % 13 13 13 Global The One of Korea Co., Ltd. 62 0.06 % 3 3 3 Steellife Co., Ltd. 85 0.06 % 4 4 4 D&C Castech Co., Ltd. 330 1.89 % 25 25 25 Geumhan Co., Ltd. 498 0.24 % 7 7 7 Mokgan Co., Ltd. 5 0.02 % 1 1 1 Wenex Co., Ltd. 373 0.53 % 19 19 19 Sulim Co., Ltd. 30 0.20 % 6 6 6 Shinkwang Engineering 24 0.36 % 2 2 2 Ek Cookware Co., Ltd. 60 0.04 % 1 1 1 KTTW Co., Ltd. 28 0.05 % 2 2 2 Avajar Co., Ltd. 1,061 0.01 % 1 1 1 Woosung I.B. Co., Ltd 7,071 0.07 % 14 14 14 CAP Korea Co., Ltd. 16 0.30 % 3 3 3 MSM Co., Ltd. 25 0.08 % —  —  —  Ddpopstyle Co., Ltd. 22 0.14 % 1 1 1 Finemetal Co., Ltd. 49 0.08 % 1 1 1 Sungkyeong Co., Ltd. 52 0.24 % 2 2 2 RMK Co., Ltd. 63 0.90 % 22 22 22 Newko Co., Ltd. 331 0.06 % 10 10 10 Dongsung Mulsan Co., Ltd. 137 0.34 % 14 14 14 Pizzakorea Co., Ltd. 42 0.18 % 9 9 9 Geumdani Co., Ltd. 2,377 1.82 % 36 36 36 Mezzanine I-pack Co., Ltd. 38 0.02 % 1 1 1 Ltop Co., Ltd. 36 0.06 % 7 7 7 Simile Aluminium Co., Ltd. 428 0.31 % 9 9 9 GT Tooling Co., Ltd. 604 0.17 % 6 6 6 Team Korea Co., Ltd. 4,782 0.37 % 24 24 24 Donghwa TCA Co., Ltd. 1,012 0.30 % 25 25 25 Hankook Piaget Co., Ltd. 4 0.01 % 1 1 1 Coco Food Co., Ltd. 648 1.24 % 33 33 33 Woori Industry Co., Ltd. 102 1.05 % 21 21 21 Ssangyong Youngweol Plant Service&Engineering Co., Ltd. 83 0.07 % 4 1 1 SH Co., Ltd. 39 0.20 % 8 8 8 Daeyoung Co., Ltd. 75 0.01 % 8 8 8 Chandown Food Co., Ltd. 46 0.14 % 9 9 9 Getron Co., Ltd. 7,259 0.20 % 37 4 4 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Jungmun Co., Ltd. 19 0.26 % ￦ 2 2 2 Andong Trading Corporation Co., Ltd. 42 0.00 % 2 2 2 JM Tech Co., Ltd. 403 0.67 % 82 10 10 SGC Energy Co., Ltd. 580,000 5.00 % 2,900 7,856 7,856 Le Soleil KHNP LLC 137,600 19.00 % 1,376 1,376 1,376 Ihsung CNI Co., Ltd. 127,660 4.30 % 1,500 2,016 2,016 H Robotics Co., Ltd. 903,601 8.05 % 4,000 5,638 5,638 Good Tcells Co., Ltd. 11,364 0.34 % 500 347 347 IPS Bio Co., Ltd. 1,975 3.13 % 1,000 843 843 Nine B Co., Ltd. 5,000 4.96 % 1,000 1,000 1,000 Choigang-gujo Co., Ltd. 61 0.45 % 6 1 1 Youngheung Industry Co., Ltd. 101 0.05 % 5 1 1 Hosungsteel Co., Ltd. 323 0.26 % 14 3 3 Uktae IND. Co., Ltd. 140 0.12 % 7 1 1 JFC Co., Ltd. 16 0.01 % 2 2 2 Hyundai Tech Co., Ltd. 28 0.69 % 10 10 10 Daeil Co., Ltd. 301 0.42 % 15 2 2 Seohan Food Co., Ltd. 83 0.19 % 2 2 2 Daehyeon Recycle Co., Ltd. 59 0.61 % 12 12 12 Metal Link Inc. Co., Ltd. 709 0.17 % 35 4 4 Pipetec Korea Co., Ltd. 50 0.07 % 10 1 1 SungJin Tech Co., Ltd. 803 1.20 % 24 8 8 Yujin E&C Co., Ltd. 29 0.18 % 6 —  —  Daishin Logistics Co., Ltd. 13 0.09 % 1 1 1 JinSung Engineering Co., Ltd. 18 0.30 % 18 18 18 Yongho Industry Co., Ltd. 157 0.22 % 32 1 1 Wow tech Co., Ltd. 369 0.75 % 11 11 11 World Power Tech Co., Ltd. 16 0.28 % 24 24 24 PBM Auto Co., Ltd. 1,001 1.06 % 10 10 10 K2 Motors Co., Ltd. 54 0.28 % 1 1 1 CL Tech Co., Ltd. 801 2.25 % 40 40 40 Mirae Industry Co., Ltd. 39 0.04 % 6 6 6 Gentak Korea Co., Ltd. 301 0.31 % 8 8 8 Sungjin Chemical Co., Ltd. 118 0.36 % 4 4 4 LMAT Co., Ltd. 198 0.04 % 20 20 20 Poong Lim Industrial Co., Ltd. 25 0.00 % 38 38 38 Dae Sung GeoTech Co., Ltd. 631 1.28 % 32 32 32 Saeheemang Co., Ltd. 756 0.60 % 15 15 15 Hakbong Precision Co., Ltd. 1,460 1.18 % 15 15 15 Vornech Co., Ltd. 431 0.37 % 11 2 2 Woojin Formtech Co., Ltd. 76 0.08 % 8 1 1 Korea Engineer Manufacturing Co., Ltd. 114 0.26 % 6 1 1 Sinwa J&K Co., Ltd. 476 0.28 % 5 5 5 Owon E&G Co., Ltd. 132 0.20 % 4 4 4 Guseong Co., Ltd. 141 0.20 % 3 3 3 Irefarm Co., Ltd. 45 0.30 % 3 3 3 Nam-hae E&C Co., Ltd. 117 0.10 % 2 2 2 Haenarae Agricultural Corp. 15 0.03 % 2 2 2 DECO&E Co., Ltd. 1,261 0.00 % 2 2 2 Design Beyond Co., Ltd. 17 0.19 % 2 2 2 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won LBK Co., Ltd. 8 0.05 % ￦ 1 1 1 Duckwon industrial Co., Ltd. 32 0.43 % 13 13 13 ASPT Co., Ltd. 64 0.82 % 19 19 19 SIMA Co., Ltd. 29 0.05 % 3 3 3 Jingkang Resources Co., Ltd. 90 1.57 % 13 13 13 Eslin Co., Ltd. 39 0.14 % 8 8 8 Shinwon Co., Ltd. 275 0.42 % 19 19 19 CIC Tech Co., Ltd. 96 0.54 % 10 10 10 Orano Expansion 5,742,405 4.72 % —  —  —  Fourever Co., Ltd. 44 0.10 % 4 4 4 Myungil Metal Co., Ltd. 80 0.10 % 4 4 4 Daeshin ECM Co., Ltd. 182 0.30 % 9 9 9 Greencarbon Co., Ltd. 79 0.06 % 1 1 1 Sunkoo Co., Ltd. 4 0.10 % 2 2 2 Jians Construction Co., Ltd. 45 0.01 % 2 4 4 DH trading Co., Ltd. 891 0.04 % 178 —  —  Sangsin Co., Ltd. 29 0.09 % 15 15 15 Steel focus Co., Ltd. 154 0.20 % 4 4 4 Kamada Korea Co., Ltd. 437 0.33 % 22 22 22 Fosys Co., Ltd. 19 0.08 % 4 4 4 GB precision Co., Ltd. 137 0.57 % 1 1 1 Ewon Art Co., Ltd. 185 0.61 % 9 9 9 DI Tech Co., Ltd. 3 0.00 % —  —  —  Hans AD Co., Ltd. 33 0.35 % 2 2 2 Chaegim Environment Development Co., Ltd. 158 0.01 % 3 3 3 Daesung Stain Co., Ltd. 32 0.32 % 2 2 2 YSM Co., Ltd. 281 2.07 % 14 14 14 Dong In Industry Co., Ltd. 65 0.13 % 3 3 3 U&I Co., Ltd. 50 0.22 % 5 5 5 World One Co., Ltd. 401 0.58 % 10 10 10 Yewon Co., Ltd. 24 0.02 % 1 —  —  TSNT Co., Ltd. 119 0.00 % 24 24 24 Shinsung Tech Co., Ltd. 314 0.01 % 16 16 16 JSL Co., Ltd. 51 0.49 % 3 3 3 Loft Garden Co., Ltd. 1 0.04 % —  —  —  Handon Co., Ltd. 74 0.25 % 11 11 11 GH Tech Co., Ltd. 82 0.22 % 3 3 3 Daeo Co., Ltd. 13 0.23 % 4 4 4 Bokwang Co., Ltd. 76 0.00 % 15 15 15 Samkum Industry Co., Ltd. 201 0.48 % 40 40 40 Dyntex Korea Co., Ltd. 75 0.28 % 15 15 15 Mirae Engineering Co., Ltd. 66 0.15 % 1 1 1 Mideumeul-juneun-namu Co., Ltd. 119 0.53 % 6 6 6 Seil Textile Co., Ltd. 16 0.15 % 3 3 3 Ilshin Tech Co., Ltd. 36 0.00 % 7 7 7 Magtec Co., Ltd. 28 0.00 % 6 6 6 Sukwon Co., Ltd. 2,885 0.59 % 29 29 29 Hae-sung Metal Co., Ltd. 159 0.17 % 3 3 3 White&Clean Foods Co., Ltd. 330 0.00 % 3 3 3 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Michang Cable Co., Ltd. 1,096 0.26 % ￦ 16 16 16 G.M Foods Co., Ltd. 57 0.16 % 9 9 9 Wecan Global Inc. Co., Ltd. 165 0.08 % 8 8 8 Daeju Steel Co., Ltd. 11 0.20 % 1 1 1 Hyundai Glass Co., Ltd. 860 0.83 % 43 43 43 MEC Co., Ltd. 16,468 1.17 % 41 41 41 Daeyeoneco Co., Ltd. 151 0.00 % 15 15 15 Hyesung Cable&Communication Inc. 762 0.39 % 38 38 38 Sangjin Co., Ltd. 428 0.35 % 21 21 21 Topis Co., Ltd. 246 0.71 % 14 14 14 G&L Tech Co., Ltd. 2 0.06 % —  —  —  Cheonhae Co., Ltd. 72 0.00 % 2 2 2 Iksan-guwon Co., Ltd. 563 0.00 % 11 11 11 Korea Remicon Co., Ltd. 36 0.03 % 5 5 5 New Tech Co., Ltd. 23 0.15 % 2 2 2 Segeon Co., Ltd. 124 0.00 % 4 4 4 MS Tech Co., Ltd. 9 0.15 % 1 1 1 J.I Steel Co., Ltd. 21 0.00 % 2 2 2 HNT Co., Ltd. 172 0.00 % 9 9 9 Taejin Co., Ltd. 27 0.08 % 3 3 3 Macroad Co., Ltd. 953 0.17 % 10 10 10 Woongjin Energy Co., Ltd. 94 0.00 % 9 9 9 Electric Contractors’ Financial Cooperative Co., Ltd. —  —  39 39 39 Information&Communication Financial Cooperative Co., Ltd. —  —  15 15 15 Common Computer Co., Ltd. 3,856 1.87 % 1,000 1,000 1,000 Fine Powerex Co., Ltd. 72,633 4.92 % 1,500 1,500 1,500 Eunsung Industrial Co., Ltd. 3 0.03 % 1 1 1 KPE Co., Ltd. 51 0.19 % 13 13 13 Dongbangfarms Co., Ltd. 904 0.55 % 41 5 5 Sungdo Pack Co., Ltd. 15 0.06 % 1 1 1 Coffeenie Co., Ltd. 2 0.00 % 1 1 1 Medi Pharma Plan Co., Ltd. 1,075 0.26 % 108 8 8 Woori Ascon Co., Ltd. 25 0.34 % 10 10 10 Dong Shin Hydraulies Co., Ltd. 9,460 0.14 % 47 47 47 Cheonwoo E.P.S Co., Ltd. 371 1.10 % 19 19 19 Koa Tech Co., Ltd. 1,244 0.77 % 12 12 12 Jinwoo Textile Co., Ltd. 91 0.68 % 9 9 9 SKE Cable Co., Ltd. 120 0.08 % 6 6 6 Hi Korea Co., Ltd. 1,845 1.94 % 185 185 185 Daeheung Engineering Co., Ltd. 65 0.01 % 1 1 1 Etapol Co., Ltd. 1,361 0.54 % 41 41 41 Yoongwon International Co., Ltd. 157 1.47 % 31 31 31 Avoh Ceramic&Bath Co., Ltd. 173 0.14 % 3 3 3 Dongyang R.P.F. Industrial Co., Ltd. 59 0.03 % 2 2 2 Yuil Engineering Co., Ltd. 14 0.03 % 1 1 1 Taesan Co., Ltd. 146 0.69 % 35 35 35 Jico Co., Ltd. 10,581 0.01 % 26 26 26 K Shipbuilding Co., Ltd. 8,622 0.25 % 1,078 1,078 1,078 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Seokjin E&T Co., Ltd. 81 0.06 % ￦ 8 8 8 Agencore Co., Ltd. 104,350 5.67 % 1,200 1,200 1,200 SamHong Machinery. EMC Co., Ltd. 476,192 19.23 % 5,000 5,000 5,000 Thermo Tec Co., Ltd. 446 0.03 % 4 4 4 DaeYang Hydro Co., Ltd. 6 0.02 % 1 1 1 SangMoo Steel Co., Ltd. 24 0.04 % 2 2 2 Jungin Distribution Co., Ltd. 17 0.00 % 3 3 3 TheSun Co., Ltd. 77 0.06 % 1 1 1 Daedong Co., Ltd. 176 0.33 % 18 18 18 Daewoong and Technology Co., Ltd. 423 1.14 % 42 42 42 Ebadom Co., Ltd. 361 0.21 % 58 58 58 ChoungHwa Precise Co., Ltd. 428 0.08 % 43 4 4 Snopa Co., Ltd. 458 0.01 % 5 5 5 Aloha Factory Co., Ltd. 2,970 3.61 % 1,000 1,000 1,000 Dailyshot Co., Ltd. 339 1.85 % 1,001 1,001 1,001 Mediquitous Co., Ltd. 5,080 0.69 % 1,250 1,250 1,250 SKD Korea Co., Ltd. 40 0.28 % 20 20 20 Samhyup Co., Ltd. 376 0.91 % 38 38 38 Gogang Aluminum Co., Ltd. 828 1.52 % 41 41 41 Taekwang Paper Board Co., Ltd. 133 0.49 % 23 23 23 NY Tech Co., Ltd. 33 0.15 % 2 2 2 Sekwang Precision Co., Ltd. 394 0.84 % 79 79 79 Dongbang Metal Co., Ltd. 1,985 0.32 % 20 20 20 Samwang Co., Ltd. 170 0.25 % 17 17 17 Yurim CNF Co., Ltd. 15 0.23 % 2 2 2 Guseul Co., Ltd. 89 0.23 % 9 9 9 Gaone International Co., Ltd. 54 0.29 % 14 14 14 Daekwang Forging Co., Ltd. 1,298 1.99 % 130 130 130 Dongyang Pratech Co., Ltd. 265 1.21 % 29 29 29 Samjin Placo Co., Ltd. 661 0.52 % 33 33 33 MS Steel Industrial Co., Ltd. 167 0.40 % 8 8 8 STS Global Co., Ltd. 9 0.04 % 1 1 1 Y Tech Co., Ltd. 855 0.65 % 34 34 34 CK Industry Co., Ltd. 4,178 7.54 % 167 167 167 J&J Tech Co. 14 0.22 % 1 1 1 Shield Board Co., Ltd. 165 0.15 % 3 3 3 SFC International Co., Ltd. 11 0.01 % 1 1 1 Korea Ocean Machinery & Technology Co., Ltd. 763 0.45 % 76 76 76 Hana ITM Inc. 8,443 0.70 % 84 84 84 Jeuvis Co., Ltd. 191 0.30 % 2 2 2 JBM Co., Ltd. 662 0.34 % 20 20 20 Jungwoo Metal Solution Co., Ltd. 27 0.08 % 2 2 2 MS Precision Co., Ltd. 220 0.16 % 22 22 22 YM Tech Co., Ltd. 2 0.01 % 1 1 1 C&C ENG Co., Ltd. 439 1.59 % 22 22 22 Minjin Co., Ltd. 24 0.01 % 1 1 1 Daejoo E&G Co., Ltd. 133 0.00 % 27 27 27 Taeyoung Precision Co., Ltd. 31 0.22 % 1 1 1 Shin Heung Precision Co., Ltd. 93 4.63 % 4 4 4 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won TaeGwang P&C Co., Ltd. 530 0.90 % ￦ 13 13 13 KyeongGwang Tech Co., Ltd. 244 1.04 % 7 7 7 269,065 202,243 202,243 Debt securities Aron Flying Ship Co., Ltd. (*1) —  —  ￦ 500 529 529 ￦ 594,355 502,829 502,829 (*1) The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide. (*2) The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2022. 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Listed Korea District Heating Corp. 2,264,068 19.55 % ￦ 173,201 55,356 55,356 KG Mobility Co., Ltd. (formerly, Ssangyong Motor Co., Ltd.) 12,205 0.01 % 428 106 106 SM Korea Line Corp. 180 0.00 % 1 —  —  Namkwang Engineering & Construction Co., Ltd. 46 0.00 % 15 —  —  Bumyang Construction Co., Ltd. 35 0.00 % 2 —  —  ELCOMTEC Co., Ltd. 32,875 0.04 % 217 43 43 PAN Ocean Co., Ltd. 1,492 0.00 % 14 6 6 STX Heavy Industries Co., Ltd. 68,874 0.24 % 537 806 806 Codes Combine Co., Ltd. 291 0.00 % 1 1 1 PT Adaro Energy Tbk. 480,000,000 1.50 % 65,028 95,505 95,505 Denison Mines Corp. 58,284,000 6.54 % 84,134 131,790 131,790 Fission Uranium Corp. 100,000 0.01 % 41 105 105 SangSangin Industry Co., Ltd. 1,457 0.01 % 38 3 3 Vitzrosys Co., Ltd. 399 0.00 % 2 —  —  EMnI Co., Ltd. 628 0.00 % 25 1 1 Vissem electronics, Co., Ltd. 301 0.00 % 11 1 1 KC Industry Co., Ltd. 139 0.00 % 6 —  —  Aone Alform Co., Ltd. 2,672 0.04 % 19 4 4 Ihsung CNI Co., Ltd. 142,860 4.81 % 1,500 1,327 1,327 BDI Co., Ltd. (*3) 6,390,478 32.54 % —  —  —  325,220 285,054 285,054 Unlisted (*1) Hwan Young Steel Co., Ltd. 10,916 0.14 % ￦ 1,092 97 97 SAMBO AUTO. Co., Ltd. 15,066 0.02 % 38 38 38 Mobo Co., Ltd. 504 0.00 % 14 14 14 Dae Kwang Semiconductor Co., Ltd. 589 0.07 % 6 6 6 Sanbon Department Store 828 0.01 % 124 3 3 Miju Steel Mfg. Co., Ltd. 1,097 0.23 % 50 50 50 Sungwon Co., Ltd. 117 0.07 % 29 29 29 IMHWA Corp. 329 0.11 % 5 5 5 DALIM Special Vehicle Co., Ltd. 58 0.08 % 10 10 10 Moonkyung Silica Co., Ltd. 42 0.56 % —  —  —  Sungkwang Timber Co., Ltd. 3 0.08 % 5 5 5 KS Remicon Co., Ltd. 12 0.04 % 3 3 3 Joongang Platec Co., Ltd. 3,591 0.75 % 72 35 35 Pyungsan SI Co., Ltd. 434 0.01 % 4 4 4 Samgong Development Co., Ltd. 12 0.01 % 7 7 7 Joongang Development Co., Ltd. 540 0.12 % 8 8 8 Newasia Co., Ltd. (formerly, AJS Co., Ltd.) 12,906 0.23 % 32 32 32 MSE Co., Ltd. 429 0.13 % 9 9 9 Ilrim Nano Tec Co., Ltd. 1,520 0.07 % 15 15 15 Ilsuk Co., Ltd. 152 0.17 % 10 10 10 Zyle Daewoo Motor Sales Co., Ltd. 22 0.00 % —  —  —  Daewoo Development Co., Ltd. 8 0.00 % —  —  —  Seyang Inc. 537 0.05 % 27 30 30 Seungri Enterprise Co., Ltd. 93 0.05 % 3 3 3 Shin-E 1,569 0.64 % 110 2 2 Ejung Ad Co., Ltd. 132 0.09 % 3 3 3 Solvus Co., Ltd. 1,056 0.04 % 3 3 3 Myung Co., Ltd. 89 0.05 % 2 2 2 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Biwang Industry Co., Ltd. 406 0.04 % ￦ 2 2 2 Young Sung Co., Ltd. 89 0.40 % 26 26 26 Yuil Industrial Electronics Co., Ltd. 804 0.32 % 15 15 15 Woojin Industry Corporation 3 0.00 % 16 16 16 Kwang Sung Industry Co., Ltd. 325 0.35 % 7 7 7 Futech Mold Co., Ltd. 274 0.27 % 14 14 14 Woojoo Environment Ind. Co., Ltd. 101 0.11 % 13 13 13 Hyungji Esquire Co., Ltd. 61 0.02 % 22 22 22 Morado Co., Ltd. 209 0.04 % 2 2 2 Myung Sung Tex Co., Ltd. 20 0.00 % 2 2 2 Kwang Sung Co., Ltd. 610 0.53 % 31 31 31 Seen Business and Technology co., Ltd. 29,424 0.73 % 148 7 7 Woobang Construction Co., Ltd. 8 0.00 % 8 8 8 Shin Pyung Co., Ltd. 6 0.03 % 3 3 3 JMC Heavy Industries Co., Ltd. 2,724 0.10 % 27 2 2 Najin Steel Co., Ltd. 37 0.06 % 5 5 5 Sinkwang Industry Co., Ltd. 1,091 1.68 % 5 5 5 Elephant & Friends Co., Ltd. 563 0.61 % 3 3 3 Mireco Co., Ltd. 109 0.25 % 11 11 11 L&K Industry Co., Ltd. 1,615 0.60 % 24 24 24 JO Tech Co., Ltd. 1,263 0.62 % 25 25 25 Kendae Printing Co., Ltd. 422 0.60 % 21 21 21 Dauning Co., Ltd. 231 0.41 % 6 6 6 Korea Trecision Co., Ltd. 22 0.45 % 5 5 5 Hurim Biocell Co., Ltd. 1,021 0.00 % 5 5 5 Sunjin Power Tech Co., Ltd. 4,941 0.92 % 247 32 32 Beer Yeast Korea Inc. 1,388 0.43 % 7 7 7 B CON Co., Ltd. 96 1.16 % 6 6 6 Ace Integration Co., Ltd. 105 0.09 % 24 24 24 AceInti Agricultural Co., Ltd. 16 0.02 % 5 5 5 KyungDong Co., Ltd. 130 0.01 % 1 1 1 ChunWon Development Co., Ltd. 193 0.19 % 39 39 39 SungLim Industrial Co., Ltd. 29 0.03 % 1 1 1 Korea Minerals Co., Ltd. 191 0.05 % 134 1 1 HyoDong Development Co., Ltd. 128 0.16 % 25 1 1 JoHyun Co., Ltd. 350 1.56 % 18 18 18 KC Co., Ltd. 5,107 0.17 % 26 26 26 SeongJi Industrial Co., Ltd. 41 0.05 % 1 1 1 Seyang Precision Ind.Co., Ltd. 829 0.23 % 41 41 41 Dooriwon Food System Co., Ltd. 13 0.27 % 1 1 1 Sung Kwang Co., Ltd. 23 0.37 % 6 6 6 Shinheung petrol. Co., Ltd. 699 0.14 % 35 35 35 Samsung Tech Co., Ltd. 486 1.28 % 97 36 36 Younil Metal Co., Ltd. 41 0.21 % 21 21 21 Sevenvalley JC (formerly, CJ Paradise Co., Ltd.) 24 0.02 % 12 12 12 Han Young Technology Company Co., Ltd. 35 0.00 % —  —  —  Ptotronics Co., Ltd. 843 0.42 % 84 6 6 NFT Co., Ltd. 136 0.40 % 8 8 8 Hyundaitech Co., Ltd. 1,363 0.87 % 27 27 27 Dasan Material Co., Ltd. 29 0.04 % 22 22 22 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Fish World Co., Ltd. 47 0.21 % ￦ 2 2 2 SG Shinsung Engineering and Construction Co., Ltd. 10 0.00 % 6 —  —  Samdo Industry Electric Co., Ltd. 48 0.02 % 1 1 1 Taejung Industries Co., Ltd. 9,268 0.30 % 5 5 5 Shinsei Trading Co., Ltd. 64 0.72 % 6 6 6 Dynamic Co., Ltd. 111 0.19 % 3 3 3 Green Alchemy Co., Ltd. 38,202 1.48 % 191 17 17 KM Leatech Co., Ltd. 1,648 0.98 % 8 8 8 Semist Co., Ltd. 555 0.80 % 3 3 3 Sewon Bus Co., Ltd. 12 0.00 % —  —  —  Enertec Co., Ltd. 7,937 0.19 % 44 44 44 Sangji Co., Ltd. 20 0.26 % 4 4 4 Bellie Doughnuts Co., Ltd. 169 0.19 % 10 10 10 Set Holding (*2) 1,100,220 2.50 % 229,255 165,923 165,923 Choheung packing Co., Ltd. 61 0.13 % 12 12 12 Jaewoo Co., Ltd. 359 0.24 % 11 11 11 Wooyang HC Co., Ltd 1,375 0.01 % 159 13 13 TheYeonriji Co., Ltd. 116 0.10 % 6 6 6 Flusys Co., Ltd. 9 0.08 % 2 2 2 DongSeo Electronics Co., Ltd. 347 0.07 % 17 17 17 Daewoo Display Co., Ltd. 177 0.03 % 5 5 5 NTS Co., Ltd. 143 0.22 % 36 36 36 AID CO., Ltd. 1,212 0.57 % 36 36 36 Changwon Eco-friendly farming Corp. 3 0.01 % —  —  —  Kumo Hitech Co., Ltd. 6,697 0.53 % 100 32 32 Kyung Pyo Industry Co., Ltd. 186 0.76 % 19 19 19 Doosung Heavy Industries Co., Ltd. 53 0.06 % 5 5 5 Samjoo Hightech Co., Ltd. 522 0.08 % 3 3 3 Samkwang Chemical Co., Ltd. 204 1.27 % 51 51 51 Shinseung Chemical Industy Co., Ltd. 5 0.01 % 60 —  —  KJ Alloy Co., Ltd. 368 0.20 % 7 7 7 SM Hi-tech Co., Ltd. 22 0.39 % 22 22 22 Puruen Environment Co., Ltd. 967 1.34 % 19 19 19 Miretech Co., Ltd. 9,111 0.27 % 18 18 18 Sejin Hightech Co., Ltd. 17,980 0.16 % 18 18 18 Eun Sung Enterprise Co., Ltd. 1,131 0.72 % 17 17 17 Shinyoung Textiles Co., Ltd. 523 1.01 % 52 23 23 Ilwoo Steel Co., Ltd. 41 0.28 % 17 17 17 Dong-un Tech Co., Ltd. 1,159 6.28 % 81 34 34 Wongwang Door Corp. 575 1.00 % 29 29 29 Mansu Co., Ltd. 344 0.25 % 15 15 15 Eanskorea Co., Ltd. 39 0.05 % 2 2 2 Youngdongseafood Co., Ltd. 165 0.33 % 8 8 8 Hyunwoo Winstar Co., Ltd. 1 0.00 % —  —  —  Sungchang Tech Co., Ltd. 159 0.31 % 19 19 19 Yuchang Industry Co., Ltd. 90 0.11 % 5 5 5 Jeongpum Co., Ltd. 322 0.35 % 16 16 16 Korea Steel Power Co., Ltd. 2,761 1.88 % 55 2 2 Amanex Co., Ltd. 10 0.02 % 9 9 9 Dae-A Leisure Co., Ltd. 23 0.00 % 4 4 4 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Caffe Bene Co., Ltd. 1,908 0.03 % ￦ 9 9 9 Jinhung Packaging Co., Ltd. 4,329 3.02 % 22 22 22 Donglim Eng Co., Ltd. 26 0.11 % 3 3 3 SIP Co., Ltd. 274 0.55 % 7 7 7 Daeji Product Co., Ltd. 15 0.05 % 1 —  —  SSET Co., Ltd. 181 0.30 % 18 18 18 Sewon PM Tech Co., Ltd. 963 1.11 % 48 48 48 Dawon Yuhwa Co., Ltd. 506 1.94 % 25 25 25 Ewon materials Co., Ltd. (formerly, Shinwoo Toptech Co., Ltd.) 834 0.51 % 83 6 6 KMLC Co., Ltd. 281 0.14 % 22 22 22 Seinfood Co., Ltd. 13 0.17 % 7 7 7 TaeSung Eco-Tech. Co., Ltd. 1,368 4.55 % 34 34 34 Kukex Inc. 639 0.05 % 3 3 3 Youngshin Plus Co., Ltd. 104 0.12 % 5 5 5 Chang won Engineering Co., Ltd. 22 0.00 % 4 4 4 Samsung Silup Co., Ltd. 47 0.19 % 5 5 5 Samwon Bio Tech Co., Ltd. 390 0.25 % 6 6 6 IZU KOREA Co., Ltd. 48 0.00 % 2 2 2 Dongdo CNP Co., Ltd. 234 0.36 % 6 6 6 S.I.T. Co., Ltd 2,213 0.44 % 22 22 22 Taejin Hiech Co., Ltd. 78 0.26 % 3 3 3 Headone Co., Ltd. 69 0.12 % 7 7 7 E-Won Solutech Co., Ltd. 158 0.16 % 40 40 40 KPL Circuit Co., Ltd. 283 0.08 % 14 14 14 Road Solar Co., Ltd. 12 0.00 % —  —  —  Han Mi Flexible Co., Ltd. 143 0.20 % 43 43 43 Millennium PNT Co., Ltd. 227 0.37 % 6 6 6 Dae Myung Co., Ltd. 114 0.08 % 3 3 3 Young San Heavy Industries Co., Ltd. 74 0.11 % 7 7 7 Samchungwon Co., Ltd. 15 0.24 % 2 2 2 Wooyang Frozen Foods Co., Ltd. 66 0.82 % 27 27 27 Nanomic Co., Ltd. 94 0.63 % 38 38 38 Samsung Nonferrous Metal Co., Ltd. 89 0.26 % 9 9 9 Daewha Fuel Pump Ind., Ltd. 83 0.05 % 10 10 10 WorldCnM Inc. 131 1.09 % 10 10 10 Superone Co., Ltd. 1,585 1.45 % 8 8 8 Buyoung Panji Co., Ltd. 478 0.44 % 12 12 12 International Paint Korea Co., Ltd. 111 0.48 % 11 11 11 EI Lighting Co., Ltd. 358 0.36 % 18 18 18 Yooseung Co., Ltd. 10 0.08 % 1 1 1 Sungkwang Co., Ltd. 48 0.35 % 2 2 2 Ajin KSB Co., Ltd. 204 0.31 % 18 18 18 Sewon Ceramic Co., Ltd. 530 1.01 % 5 5 5 Choyang Tech Co., Ltd. 465 1.01 % 23 23 23 TK Co., Ltd. 307 0.70 % 15 15 15 Arari Co., Ltd. 14 0.05 % 1 1 1 C&S Corporation Co., Ltd. 1,304 0.01 % 13 13 13 Global The One of Korea Co., Ltd. 62 0.06 % 3 3 3 Steellife Co., Ltd. 85 0.06 % 4 4 4 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Geumhan Co., Ltd. 498 0.24 % ￦ 7 7 7 Mokgan Co., Ltd. 5 0.02 % 1 1 1 Wenex Co., Ltd. 373 0.53 % 19 19 19 Sulim Co., Ltd. 30 0.20 % 6 6 6 Shinkwang Engineering 24 0.36 % 2 2 2 Ek Cookware Co., Ltd. 60 0.04 % 1 1 1 KTTW Co., Ltd. 28 0.05 % 2 2 2 Avajar Co., Ltd. 1,061 0.01 % 1 1 1 Woosung I.B. Co., Ltd. 7,071 0.07 % 14 14 14 CAP Korea Co., Ltd. 16 0.30 % 3 3 3 MSM Co., Ltd. 25 0.08 % —  —  —  Ddpopstyle Co., Ltd. 22 0.14 % 1 1 1 Finemetal Co., Ltd. 49 0.08 % 1 1 1 Sungkyeong Co., Ltd. 52 0.24 % 2 2 2 Newko Co., Ltd. 331 0.06 % 10 10 10 Dongsung Mulsan Co., Ltd. 137 0.34 % 14 14 14 Pizzakorea Co., Ltd. 42 0.18 % 9 9 9 Geumdani Co., Ltd. 2,377 1.82 % 36 36 36 Mezzanine I-pack Co., Ltd. 38 0.02 % 1 1 1 Ltop Co., Ltd. 36 0.06 % 7 7 7 Simile Aluminium Co., Ltd. 428 0.31 % 9 9 9 GT Tooling Co., Ltd. 604 0.17 % 6 6 6 Team Korea Co., Ltd. 4,782 0.37 % 24 24 24 Donghwa TCA Co., Ltd. 1,012 0.30 % 25 25 25 Hankook Piaget Co., Ltd. 4 0.01 % 1 1 1 Coco Food Co., Ltd. 648 1.24 % 33 33 33 Woori Industry Co., Ltd. 102 1.05 % 21 21 21 Ssangyong Youngweol Plant Service&Engineering Co., Ltd. 83 0.07 % 4 1 1 SH Co., Ltd. 39 0.20 % 8 8 8 Daeyoung Co., Ltd. 75 0.01 % 8 8 8 Getron Co., Ltd. 7,259 0.20 % 37 4 4 Jungmun Co., Ltd. 19 0.26 % 2 2 2 JM Tech Co., Ltd. 403 0.67 % 82 10 10 SGC Energy Co., Ltd. 580,000 5.00 % 2,900 6,249 6,249 Le Soleil KHNP LLC 137,600 19.00 % 1,376 1,376 1,376 Ihsung CNI Co., Ltd. 127,660 4.30 % 1,500 1,937 1,937 H Robotics Co., Ltd. 903,601 8.05 % 4,000 5,639 5,639 Good Tcells Co., Ltd. 11,364 0.33 % 500 399 399 IPS Bio Co., Ltd. 1,975 3.13 % 1,000 897 897 Nine B Co., Ltd. 5,000 4.96 % 1,000 1,000 1,000 Choigang-gujo Co., Ltd. 61 0.45 % 6 1 1 Hosungsteel Co., Ltd. 323 0.26 % 14 3 3 Uktae IND. Co., Ltd. 140 0.12 % 7 1 1 JFC Co., Ltd. 16 0.01 % 2 2 2 Hyundai Tech Co., Ltd. 28 0.69 % 10 10 10 Daeil Co., Ltd. 301 0.42 % 15 2 2 Daehyeon Recycle Co.,

Financial Assets at Amortized C

Financial Assets at Amortized Cost	12 Months Ended
	Dec. 31, 2023
Financial Assets at Amortized Cost [Abstract]
Financial Assets at Amortized Cost	11. Financial Assets at Amortized Cost Financial assets at amortized cost as of December 31, 2022 and 2023 are as follows: 2022 Financial assets at amortized cost Book value In millions of won Government bonds ￦ 1,920 1,920 Others 25,078 25,078 ￦ 26,998 26,998 Current ￦ 16,762 16,762 Non-current 10,236 10,236 2023 Financial assets at amortized cost Book value In millions of won Government bonds ￦ 1,528 1,528 Others 37,315 37,315 ￦ 38,843 38,843 Current ￦ 28,905 28,905 Non-current 9,938 9,938

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2023
Derivatives [Abstract]
Derivatives	12. Derivatives (1) Derivatives as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Derivative assets Currency forward ￦ 648 17,432 18,019 —  Currency swap 236,470 589,300 274,782 527,701 —Trading 102,080 410,540 196,013 347,689 —Hedging 134,390 178,760 78,769 180,012 Interest rate swap 52,485 81,188 12,124 129,570 —Trading 52,485 81,188 12,124 129,570 —Hedging —  —  —  —  Others (*2, 3) —  40,501 2,807 35,391 ￦ 289,603 728,421 307,732 692,662 Derivative liabilities Currency forward ￦ 32,660 —  4,755 —  Currency swap 6,319 328,995 6,867 287,824 —Trading 6,319 302,415 6,867 264,260 —Hedging —  26,580 —  23,564 Interest rate swap —  2,735 —  48,238 —Trading —  2,735 —  48,238 —Hedging —  —  —  —  Others (*1,2) 6,015 56,027 6,757 97,793 ￦ 44,994 387,757 18,379 433,855 (*1) In relation to the agreement to purchase hybrid securities issued by Samcheok Eco Materials Co., Ltd., an associate of the Company, the Company has recognized as other derivative liabilities the fair value of ￦18,752 million for its performance obligation to the underwriter of the bonds. In addition, the Company has granted stock option to Chester Solar IV SpA, a joint venture of the Company, and 4 other third party investors, and recorded the related fair value of 5,986 (*2) The Company recorded the fair value of derivatives in accordance with the shareholders’ agreement of its associate, Hyundai Green Power Co., Ltd., as other derivatives. In addition, the fair value of the derivatives regarding the power sales agreement of its subsidiary, Elara Energy Project, LLC, were recorded as other derivatives. (*3) The Company recorded the fair value of derivatives regarding the Power Purchase Agreement (“PPA”) of its subsidiary Columboola Solar Farm Hold Co Pty., Ltd. as other derivatives. (2) Currency forward contracts which are not designated as hedging instruments as of December 31, 2023 are as follows: Counterparty Contract date Maturity date Contract amounts Contract exchange rate (in won) Pay Receive In millions of won and thousands of foreign JP Morgan 2023.12.08 2024.01.05 W 41,535 EUR 29,419 W 1,411.83 JP Morgan 2023.12.13 2024.01.03 13,131 USD 10,000 1,313.10 Busan Bank 2023.12.14 2024.01.05 18,126 USD 14,000 1,294.70 Woori Bank 2023.12.14 2024.01.09 18,092 USD 14,000 1,292.30 Standard Chartered 2023.12.18 2024.01.11 6,480 USD 5,000 1,295.90 Korea Development Bank 2023.12.20 2024.01.15 10,383 USD 8,000 1,297.90 Shinhan Bank 2023.12.20 2024.01.17 9,074 USD 7,000 1,296.40 JP Morgan 2023.12.21 2024.01.19 16,929 USD 13,000 1,302.20 Hana Bank 2023.12.21 2024.01.12 14,329 USD 11,000 1,302.60 Kookmin Bank 2023.12.21 2024.01.23 14,324 USD 11,000 1,302.20 Mizuho Bank 2023.12.22 2024.01.25 10,382 USD 8,000 1,297.70 Standard Chartered 2023.12.26 2024.01.26 10,382 USD 8,000 1,297.70 Nonghyup Bank 2023.12.28 2024.01.29 6,446 USD 5,000 1,289.20 Morgan Stanley 2023.12.28 2024.01.31 14,159 USD 11,000 1,287.20 Busan Bank 2023.12.28 2024.02.02 10,296 USD 8,000 1,287.00 Woori Bank 2023.12.28 2024.02.05 10,298 USD 8,000 1,287.20 MUFG 2023.11.23 2024.02.05 10,348 USD 8,000 1,293.50 Nonghyup Bank 2023.11.30 2024.01.23 5,147 USD 4,000 1,286.75 MUFG 2023.11.30 2024.01.23 5,147 USD 4,000 1,286.65 JP Morgan 2023.11.30 2024.02.22 11,561 USD 9,000 1,284.60 Morgan Stanley 2023.12.01 2024.01.23 5,199 USD 4,000 1,299.85 Korea Development Bank 2023.12.01 2024.01.15 14,303 USD 11,000 1,300.30 Mizuho Bank 2023.12.01 2024.02.14 10,386 USD 8,000 1,298.25 JP Morgan 2023.12.04 2024.02.14 6,485 USD 5,000 1,296.90 Nonghyup Bank 2023.12.06 2024.02.14 5,231 USD 4,000 1,307.75 MUFG 2023.12.13 2024.02.06 19,700 USD 15,000 1,313.30 JP Morgan 2023.12.13 2024.02.06 17,072 USD 13,000 1,313.20 Mizuho Bank 2023.12.15 2024.02.06 12,916 USD 10,000 1,291.55 Korea Development Bank 2023.12.15 2024.02.14 11,617 USD 9,000 1,290.80 Busan Bank 2023.12.20 2024.02.26 5,183 USD 4,000 1,295.80 SMBC 2023.12.20 2024.03.13 19,416 USD 15,000 1,294.43 Nonghyup Bank 2023.12.21 2024.01.05 26,065 USD 20,000 1,303.25 JP Morgan 2023.12.21 2024.01.05 26,064 USD 20,000 1,303.20 MUFG 2023.12.21 2024.01.05 27,365 USD 21,000 1,303.10 Hana Bank 2023.12.28 2024.01.15 18,041 USD 14,000 1,288.65 Mizuho Bank 2023.12.28 2024.02.26 32,146 USD 25,000 1,285.85 JP Morgan 2023.12.28 2024.03.26 8,984 USD 7,000 1,283.40 Woori Bank 2023.11.30 2024.01.03 6,440 USD 5,000 1,287.95 Nonghyup Bank 2023.11.30 2024.01.03 4,119 USD 3,200 1,287.15 Woori Bank 2023.12.20 2024.01.22 6,487 USD 5,000 1,297.30 Woori Bank 2023.12.27 2024.01.29 6,466 USD 5,000 1,292.20 Mizuho Bank 2023.12.28 2024.02.02 6,446 USD 5,000 1,289.25 Nonghyup Bank 2023.12.28 2024.02.02 12,882 USD 10,000 1,288.20 HSBC 2020.10.19 2024.10.29 140,913 USD 125,000 1,127.30 JP Morgan 2023.12.08 2024.01.05 6,541 USD 5,000 1,308.20 Counterparty Contract date Maturity date Contract amounts Contract exchange rate (in won) Pay Receive In millions of won and thousands of foreign Busan Bank 2023.12.12 2024.01.23 ￦ 19,686 USD 15,000 ￦ 1,312.40 Shinhan Bank 2023.12.14 2024.01.23 10,338 USD 8,000 1,292.19 Korea Citi Bank 2023.12.15 2024.01.15 6,467 USD 5,000 1,293.45 Nonghyup Bank 2023.12.18 2024.01.15 11,668 USD 9,000 1,296.45 Hana Bank 2023.12.27 2024.01.26 6,459 USD 5,000 1,291.89 Hana Bank 2023.12.27 2024.01.26 6,457 USD 5,000 1,291.39 JP Morgan 2023.11.02 2024.01.26 8,406 USD 6,286 1,337.20 HSBC 2023.11.27 2024.03.08 6,482 USD 5,000 1,296.30 HSBC 2023.11.27 2024.03.08 6,476 USD 5,000 1,295.20 Shinhan Bank 2023.12.08 2024.03.08 13,034 USD 10,000 1,303.38 Shinhan Bank 2023.12.15 2024.03.08 3,865 USD 3,000 1,288.22 Shinhan Bank 2023.12.28 2024.04.23 2,160 USD 1,684 1,282.40 Woori Bank 2023.12.28 2024.04.23 10,253 USD 8,000 1,281.65 (3) Currency swap contracts which are not designated as hedging instruments as of December 31, 2023 are as follows Contract year Contract amount Contract interest rate Contract (in won, USD) Counterparty Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Standard Chartered 2014~2029 ￦ 102,470 USD 100,000 3.14% 3.57% ￦ 1,024.70 Societe Generale 2014~2024 105,017 USD 100,000 4.92% 5.13% 1,050.17 Hana Bank 2015~2024 107,970 USD 100,000 4.75% 5.13% 1,079.70 Credit Agricole 2015~2024 94,219 USD 86,920 4.85% 5.13% 1,083.97 Woori Bank 2019~2027 21,708 USD 19,417 5.04% 6.75% 1,118.00 Woori Bank 2019~2024 296,000 USD 250,000 1.21% 2.50% 1,184.00 Korea Development Bank 2019~2024 177,600 USD 150,000 1.24% 2.50% 1,184.00 Hana Bank 2019~2024 118,400 USD 100,000 1.24% 2.50% 1,184.00 Woori Bank 2020~2025 241,320 USD 200,000 0.54% 1.13% 1,206.60 Korea Development Bank 2020~2025 241,320 USD 200,000 0.54% 1.13% 1,206.60 Kookmin Bank 2020~2025 120,660 USD 100,000 0.54% 1.13% 1,206.60 Kookmin Bank 2020~2026 76,355 USD 70,445 5.83% 6.00% 1,083.90 Woori Bank 2021~2026 118,170 USD 100,000 1.11% 1.13% 1,181.70 Korea Development Bank 2021~2026 118,170 USD 100,000 1.11% 1.13% 1,181.70 Hana Bank 2021~2026 118,170 USD 100,000 1.11% 1.13% 1,181.70 Hana Bank 2022~2025 385,800 USD 300,000 3.11% 3.63% 1,286.00 Woori Bank 2022~2025 257,200 USD 200,000 3.12% 3.63% 1,286.00 JP Morgan 2022~2027 128,600 USD 100,000 3.56% 4.00% 1,286.00 Woori Bank 2022~2027 128,600 USD 100,000 3.56% 4.00% 1,286.00 Kookmin Bank 2022~2027 128,600 USD 100,000 3.56% 4.00% 1,286.00 Korea Development Bank 2022~2026 283,820 USD 200,000 4.67% 5.38% 1,419.10 Hana Bank 2022~2026 141,910 USD 100,000 4.68% 5.38% 1,419.10 JP Morgan 2022~2026 141,910 USD 100,000 4.69% 5.38% 1,419.10 Woori Bank 2022~2026 141,910 USD 100,000 4.68% 5.38% 1,419.10 Korea Development Bank 2022~2028 283,820 USD 200,000 5.12% 5.50% 1,419.10 Woori Bank 2022~2028 141,910 USD 100,000 5.13% 5.50% 1,419.10 Hana Bank 2023~2026 256,000 USD 200,000 3.97% 5.38% 1,280.00 Shinhan Bank 2023~2026 192,000 USD 150,000 3.99% 5.38% 1,280.00 Kookmin Bank 2023~2026 128,000 USD 100,000 4.03% 5.38% 1,280.00 Korea Development Bank 2023~2026 256,000 USD 200,000 4.04% 5.38% 1,280.00 Bank of America 2023~2026 128,000 USD 100,000 4.04% 5.38% 1,280.00 Standard Chartered 2023~2026 128,000 USD 100,000 4.04% 5.38% 1,280.00 Woori Bank 2023~2026 192,000 USD 150,000 4.05% 5.38% 1,280.00 Nomura 2015~2025 111,190 USD 100,000 2.60% 3.25% 1,111.90 Korea Development Bank 2015~2025 111,190 USD 100,000 2.62% 3.25% 1,111.90 Woori Bank 2015~2025 55,595 USD 50,000 2.62% 3.25% 1,111.90 Hana Bank 2015~2025 55,595 USD 50,000 2.62% 3.25% 1,111.90 Woori Bank 2017~2027 111,610 USD 100,000 2.25% 3.13% 1,116.10 Korea Development Bank 2017~2027 111,610 USD 100,000 2.31% 3.13% 1,116.10 Hana Bank 2017~2027 111,610 USD 100,000 2.31% 3.13% 1,116.10 Korea Development Bank 2018~2028 108,600 HKD 800,000 2.69% 3.35% 135.75 Shinhan Bank 2018~2028 115,387 HKD 850,000 2.66% 3.35% 135.75 Korea Citi Bank 2019~2024 239,956 CHF 200,000 1.44% 0.00% 1,199.78 Korea Development Bank 2019~2027 119,978 CHF 100,000 1.43% 0.05% 1,199.78 Woori Bank 2021~2026 222,800 USD 200,000 0.93% 1.25% 1,114.00 Contract year Contract amount Contract interest rate Contract (in won, USD) Counterparty Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Shinhan Bank 2021~2026 ￦ 111,400 USD 100,000 0.92% 1.25% ￦ 1,114.00 Korea Development Bank 2021~2026 111,400 USD 100,000 0.93% 1.25% 1,114.00 Nonghyup Bank 2021~2026 111,400 USD 100,000 0.93% 1.25% 1,114.00 Woori Bank 2022~2027 262,000 USD 200,000 3.62% 4.25% 1,310.00 Export-Import Bank of Korea 2022~2027 131,000 USD 100,000 3.63% 4.25% 1,310.00 Kookmin Bank 2022~2027 131,000 USD 100,000 3.62% 4.25% 1,310.00 Hana Bank 2022~2027 131,000 USD 100,000 3.61% 4.25% 1,310.00 Korea Development Bank 2022~2027 262,000 USD 200,000 3.63% 4.25% 1,310.00 Export-Import Bank of Korea 2022~2032 349,829 HKD 1,935,000 4.87% 5.16% 180.79 JP Morgan 2022~2032 75,194 HKD 415,000 5.00% 5.16% 181.19 Export-Import Bank of Korea 2023~2030 172,982 HKD 1,037,000 4.25% 4.51% 166.81 HSBC 2019~2024 USD 205,500 AUD 300,000 3M SOFR+1.04% 3M BBSW+0.97% USD 0.69 (4) Currency swap contracts which are designated as hedging instruments as of December 31, 2023 Contract year Contract amount Contract interest rate Contract (in won) Counterparty Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Kookmin Bank 2020~2025 ￦ 118,780 USD 100,000 1.29% 2.13% ￦ 1,187.80 Shinhan Bank 2020~2025 118,780 USD 100,000 1.29% 2.13% 1,187.80 Hana Bank 2020~2025 118,780 USD 100,000 1.29% 2.13% 1,187.80 Korea Development Bank 2020~2026 118,910 USD 100,000 0.61% 1.00% 1,189.10 Hana Bank 2020~2026 118,910 USD 100,000 0.61% 1.00% 1,189.10 Woori Bank 2020~2026 118,910 USD 100,000 0.62% 1.00% 1,189.10 Nomura 2017~2037 52,457 EUR 40,000 2.60% 1.70% 1,311.42 Nomura 2017~2037 59,423 SEK 450,000 2.62% 2.36% 132.05 Kookmin Bank 2021~2026 114,230 USD 100,000 1.27% 1.25% 1,142.30 Korea Development Bank 2021~2026 114,230 USD 100,000 1.27% 1.25% 1,142.30 Hana Bank 2021~2026 114,230 USD 100,000 1.27% 1.25% 1,142.30 Korea Development Bank 2022~2027 123,710 USD 100,000 3.41% 3.63% 1,237.10 Woori Bank 2022~2027 123,710 USD 100,000 3.41% 3.63% 1,237.10 JP Morgan 2022~2027 123,710 USD 100,000 3.41% 3.63% 1,237.10 BNP Paribas 2019~2024 111,841 CHF 100,000 1.78% 0.13% 1,118.41 Kookmin Bank 2019~2024 111,841 CHF 100,000 1.78% 0.13% 1,118.41 Korea Development Bank 2022~2025 128,560 USD 100,000 3.37% 4.13% 1,285.60 Woori Bank 2022~2025 128,560 USD 100,000 3.37% 4.13% 1,285.60 Kookmin Bank 2022~2025 128,560 USD 100,000 3.37% 4.13% 1,285.60 Woori Bank 2021~2026 220,600 USD 200,000 0.47% 0.75% 1,103.00 Shinhan Bank 2021~2026 220,600 USD 200,000 0.47% 0.75% 1,103.00 Hana Bank 2021~2026 55,150 USD 50,000 0.48% 0.75% 1,103.00 Shinhan Bank 2023~2026 132,930 USD 100,000 4.07% 5.38% 1,329.30 Nonghyup Bank 2023~2026 132,930 USD 100,000 4.05% 5.38% 1,329.30 Kookmin Bank 2023~2026 132,930 USD 100,000 4.07% 5.38% 1,329.30 Woori Bank 2020~2025 245,560 USD 200,000 0.93% 1.75% 1,227.80 Hana Bank 2020~2025 245,560 USD 200,000 0.93% 1.75% 1,227.80 Korea Development Bank 2020~2025 122,780 USD 100,000 0.93% 1.75% 1,227.80 JP Morgan 2022~2025 126,180 USD 100,000 2.80% 3.60% 1,261.80 Hana Bank 2022~2025 126,180 USD 100,000 2.80% 3.60% 1,261.80 Korea Development Bank 2022~2025 252,360 USD 200,000 2.83% 3.60% 1,261.80 Woori Bank 2022~2025 126,180 USD 100,000 2.85% 3.60% 1,261.80 Woori Bank 2023~2028 259,000 USD 200,000 3.83% 4.88% 1,295.00 Korea Development Bank 2023~2028 129,500 USD 100,000 3.85% 4.88% 1,295.00 Bank of America 2023~2028 64,750 USD 50,000 3.85% 4.88% 1,295.00 (5) Interest rate swap contracts which are not designated as hedging instruments as of December 31, 2023 are as follows: Counterparty Contract Contract amount Contract interest rate per annum Pay Receive In millions of won and thousands of foreign currencies Nomura (*1) 2018~2038 ￦ 30,000 3M CD+0.10 3.75% Hana Bank 2019~2024 200,000 1.87% 3M CD+0.13% Shinhan Bank 2021~2025 100,000 2.32% 3M CD+0.43% Hana Bank 2022~2027 200,000 3.02% 3M CD+0.61% Hana Bank 2022~2027 200,000 3.04% 3M CD+0.58% Hana Bank 2022~2027 250,000 3.38% 3M CD+0.59% Nomura 2022~2027 200,000 3.55% 3M CD+0.60% Shinhan Bank 2022~2027 150,000 3.53% 3M CD+0.55% Hana Bank 2022~2027 200,000 3.70% 3M CD+0.59% Nomura 2022~2027 300,000 3.89% 3M CD+0.67% Hana Bank 2022~2027 200,000 3.93% 3M CD+0.67% Nomura 2022~2027 200,000 3.80% 3M CD+0.68% Nomura 2022~2027 300,000 4.04% 3M CD+0.60% Hana Bank 2022~2027 100,000 4.68% 3M CD+1.04% Hana Bank 2022~2027 100,000 5.45% 3M CD+1.20% Shinhan Bank 2023~2028 200,000 4.27% 3M CD+0.76% Shinhan Bank 2023~2028 50,000 4.27% 3M CD+0.76% Nomura 2023~2028 250,000 4.13% 3M CD+0.73% Hana Bank 2023~2028 200,000 3.74% 3M CD+0.51% Hana Bank 2023~2028 100,000 4.19% 3M CD+0.50% Shinhan Bank 2023~2028 300,000 3.81% 3M CD+0.70% Hana Bank 2023~2028 200,000 3.95% 3M CD+0.50% Nomura 2017~2032 52,457 2.55%+Floating rate 2.60% Nomura 2017~2032 59,423 2.57%+Floating rate 2.62% Nomura (*2) 2021~2041 30,000 1.84% 2.60% Nomura (*3) 2021~2041 50,000 1.87% 2.38% ANZ 2022~2025 AUD 865 0.48% 3.33% DBS Bank 2022~2025 AUD 865 0.48% 3.33% Societe Generale 2022~2025 AUD 865 0.48% 3.28% MUFG 2022~2048 USD 155,941 SOFR(3M) 3.71% Mizuho Bank 2022~2048 USD 155,941 SOFR(3M) 1.05% Mizuho Bank 2022~2024 USD 112,194 SOFR(1M) 1.80% Rabobank 2022~2036 USD 37,130 1.83% SOFR(6M) Mizuho Capital Markets LLC 2021~2045 USD 82,886 5.38% 1.14% (*1) Depending on the counterparty exercising the right, the contract may be early settled on the same date every year from June 15, 2023. (*2) 1.84% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+ 0.35 (*3) 1.87% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+0.35% is applied thereafter. (6) Interest rate swap contracts which are designated as hedging instruments as of December 31, 2023 are as follows: Counterparty Contract Contract amount Contract interest rate per annum Pay Receive In thousands of USD Export-Import Bank of Korea 2015~2031 USD 15,893 2.67% 6M USD Libor ING Bank 2015~2031 USD  7,861 2.67% 6M USD Libor BNP Paribas 2015~2031 USD  7,861 2.67% 6M USD Libor BNP Paribas 2009~2027 USD 41,040 4.16% 6M USD Libor KFW 2009~2027 USD 41,040 4.16% 6M USD Libor Export-Import Bank of Korea 2016~2036 USD 60,977 3.00% 6M USD Libor (7) Gain and loss on valuation and transaction of derivatives for the years ended December 31, 2021, 2022 and 2023 are as follows and included in finance income and expenses in the consolidated statements of comprehensive income or Net income effects of Net income effects of Other comprehensive 2021 2022 2023 2021 2022 2023 2021 2022 2023 In millions of won Currency forward ￦ 33,066 (20,570 ) 510 33,032 (2,710 ) 34,216 —  —  —  Currency swap 787,264 155,937 269,795 61,353 234,195 38,282 (59,108 ) (102,969 ) (11,411 ) - Trading 420,551 (77,618 ) 181,342 16,265 104,572 (1,244 ) —  —  —  - Hedging 366,713 233,555 88,453 45,088 129,623 39,526 (59,108 ) (102,969 ) (11,411 ) Interest rate swap 18,123 66,341 (16,377 ) (10,303 ) (6,800 ) 10,400 18,648 37,917 2,893 - Trading 18,123 66,341 (16,377 ) (10,303 ) (6,800 ) 10,400 —  —  —  - Hedging —  —  —  —  —  —  18,648 37,917 2,893 Other derivatives (15,459 ) 22,510 (19,729 ) —  —  6,761 —  —  —  ￦ 822,994 224,218 234,199 84,082 224,685 89,659 (40,460) (65,052) (8,518) (*) For the years ended December 31, 2021, 2022 and 2023, the net loss on valuation of derivatives applying cash flow hedge accounting , million and ￦ 3,654

Other Financial Assets

Other Financial Assets	12 Months Ended
	Dec. 31, 2023
Other Financial Assets [Abstract]
Other Financial Assets	13. Other Financial Assets (1) Other financial assets as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Loans ￦ 132,890 968,468 139,178 966,421 Less: Allowance for doubtful accounts (13 ) (54,824 ) (10 ) (80,783 ) Less: Present value discount (816 ) (32,334 ) (1,007 ) (35,468 ) 132,061 881,310 138,161 850,170 Long-term / short-term financial instruments 666,758 686,322 578,578 833,737 ￦ 798,819 1,567,632 716,739 1,683,907 (2) Loans as of December 31, 2022 and 2023 are as follows: 2022 Face value Allowance for Present value Carrying value In millions of won Short-term loans Loans for tuition ￦ 30,261 —  (816 ) 29,445 Loans for housing 29,630 —  —  29,630 Other loans 72,999 (13 ) —  72,986 132,890 (13 ) (816 ) 132,061 Long-term loans Loans for tuition 436,131 (37,783 ) (32,334 ) 366,014 Loans for housing 309,446 —  —  309,446 Loans for related parties 187,728 (17,041 ) —  170,687 Other loans 35,163 —  —  35,163 968,468 (54,824 ) (32,334 ) 881,310 ￦ 1,101,358 (54,837 ) (33,150 ) 1,013,371 2023 Face value Allowance for Present value Carrying value In millions of won Short-term loans Loans for tuition ￦ 30,497 —  (1,007 ) 29,490 Loans for housing 35,560 —  —  35,560 Other loans 73,121 (10 ) —  73,111 139,178 (10 ) (1,007 ) 138,161 Long-term loans Loans for tuition 419,684 (24,745 ) (35,468 ) 359,471 Loans for housing 301,840 —  —  301,840 Loans for related parties 222,014 (43,640 ) —  178,374 Other loans 22,883 (12,398 ) —  10,485 966,421 (80,783 ) (35,468 ) 850,170 ￦ 1,105,599 (80,793 ) (36,475 ) 988,331 (3) Changes in the allowance for doubtful accounts of loans for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Beginning balance ￦ 20,267 52,677 54,837 Bad debt expense 30,942 2,180 16,394 Other 1,468 (20 ) 9,562 Ending balance ￦ 52,677 54,837 80,793 (4) Long-term and short-term financial instruments as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Time deposits ￦ 428,813 130,570 363,286 145,336 CD 30,000 —  —  —  Others 207,945 555,752 215,292 688,401 ￦ 666,758 686,322 578,578 833,737

Inventories

Inventories	12 Months Ended
	Dec. 31, 2023
Classes of current inventories [abstract]
Inventories	14. Inventories Inventories as of December 31, 2022 and 2023 are as follows: 2022 Acquisition cost Valuation allowance Book In millions of won Raw materials ￦ 4,522,171 (1,350 ) 4,520,821 Merchandises 1,001 —  1,001 Work-in-progress 172,089 (75 ) 172,014 Finished goods 52,642 (57 ) 52,585 Supplies 2,814,377 —  2,814,377 Inventories-in-transit 2,356,444 —  2,356,444 Other inventories 13,490 —  13,490 ￦ 9,932,214 (1,482 ) 9,930,732 2023 Acquisition cost Valuation allowance Book In millions of won Raw materials ￦ 4,624,638 (1,387 ) 4,623,251 Merchandises 335 —  335 Work-in-progress 187,304 —  187,304 Finished goods 97,272 (57 ) 97,215 Supplies 2,930,978 —  2,930,978 Inventories-in-transit 1,021,797 —  1,021,797 Other inventories 14,735 —  14,735 ￦ 8,877,059 (1,444 ) 8,875,615 The reversal of the allowance for loss on inventory valuation deducted from the cost of sales for the years ended December 31, 2021, 2022 and 2023 amounts to ￦ million , million and ￦9,974 million, respectively. The amounts of loss from inventory valuation included in other gains or losses for the years ended December 31, 2021, 2022 and 2023 , million and ￦9,936 million, respectively.

Non-Financial Assets

Non-Financial Assets	12 Months Ended
	Dec. 31, 2023
Disclosure Of Other Assets [Abstract]
Non-Financial Assets	15. Non-Financial Assets Non-financial assets as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Advanced payments ￦ 160,596 51,425 300,350 75,489 Prepaid expenses 366,532 153,830 440,079 214,022 Others (*) 1,217,741 103,879 368,892 60,659 ￦ 1,744,869 309,134 1,109,321 350,170 (*) Details of others as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Greenhouse gas emissions rights ￦ 192,005 —  25,246 —  Other quick assets 1,025,736 103,879 343,646 60,659 ￦ 1,217,741 103,879 368,892 60,659

Consolidated Subsidiaries

Consolidated Subsidiaries	12 Months Ended
	Dec. 31, 2023
Disclosure of subsidiaries [abstract]
Consolidated Subsidiaries	16. Consolidated Subsidiaries (1) Consolidated subsidiaries as of December 31, 2022 and 2023 are as follows: Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   Korea Hydro & Nuclear Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea South-East Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea Midland Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea Western Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea Southern Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea East-West Power Co., Ltd. Power generation Korea 100.00 % 100.00 % KEPCO Engineering & Construction Company, Inc. (*1) Engineering and construction for utility plant and others Korea 65.77 % 51.00 % KEPCO Plant Service & Engineering Co., Ltd. Utility plant maintenance and others Korea 51.00 % 51.00 % KEPCO Nuclear Fuel Co., Ltd. Nuclear fuel Korea 96.36 % 96.36 % KEPCO KDN Co., Ltd. Electric power information technology and others Korea 100.00 % 100.00 % KEPCO International HongKong Ltd. Holding company Hong Kong 100.00 % 100.00 % KEPCO International Philippines Inc. Holding company Philippines 100.00 % 100.00 % KEPCO Gansu International Ltd. Holding company Hong Kong 100.00 % 100.00 % KEPCO Philippines Holdings Inc. Holding company Philippines 100.00 % 100.00 % KEPCO Philippines Corporation Operation of utility plant Philippines 100.00 % 100.00 % KEPCO Ilijan Corporation Construction and operation of utility plant Philippines 51.00 % 51.00 % KEPCO Lebanon SARL Operation of utility plant Lebanon 100.00 % —  KEPCO Neimenggu International Ltd. Holding company Hong Kong 100.00 % 100.00 % KEPCO Shanxi International Ltd. Holding company Hong Kong 100.00 % 100.00 % KOMIPO Global Pte Ltd. Holding company Singapore 100.00 % 100.00 % KEPCO Netherlands B.V. Holding company Netherlands 100.00 % 100.00 % KEPCO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOSEP Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOMIPO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOWEPO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOSPO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KEPCO Middle East Holding Company Holding company Bahrain 100.00 % 100.00 % Qatrana Electric Power Company Construction and operation of utility plant Jordan 80.00 % 80.00 % KHNP Canada Energy Ltd. Holding company Canada 100.00 % 100.00 % KEPCO Bylong Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   Korea Waterbury Uranium Limited Partnership Resources development Canada 80.00 % 80.03 % KEPCO Holdings de Mexico Holding company Mexico 100.00 % 100.00 % KST Electric Power Company, S.A.P.I. de C.V. Construction and operation of utility plant Mexico 56.00 % 56.00 % KEPCO Energy Service Company Operation of utility plant Mexico 100.00 % 100.00 % KEPCO Netherlands S3 B.V. Holding company Netherlands 100.00 % 100.00 % PT. KOMIPO Pembangkitan Jawa Bali Operation of utility plant Indonesia 51.00 % 51.00 % PT. Cirebon Power Service (*2) Operation of utility plant Indonesia 27.50 % 27.50 % KOWEPO International Corporation Operation of utility plant Philippines 99.99 % 99.99 % KOSPO Jordan LLC Operation of utility plant Jordan 100.00 % 100.00 % EWP America Inc. Holding company USA 100.00 % 100.00 % EWP Renewable Corporation Holding company USA 100.00 % 100.00 % KNF Canada Energy Limited Holding company Canada 100.00 % 100.00 % EWP Barbados 1 SRL Holding company Barbados 100.00 % 100.00 % California Power Holdings, LLC Power generation USA 100.00 % 100.00 % Gyeonggi Green Energy Co., Ltd. Power generation Korea 62.01 % 62.01 % PT. Tanggamus Electric Power Power generation Indonesia 52.50 % 52.50 % Gyeongju Wind Power Co., Ltd. Power generation Korea 70.00 % 70.00 % KOMIPO America Inc. Holding company USA 100.00 % 100.00 % PT. EWP Indonesia Holding company Indonesia 99.96 % 99.96 % KEPCO Netherlands J3 B.V. Holding company Netherlands 100.00 % 100.00 % Korea Offshore Wind Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Global One Pioneer B.V. Holding company Netherlands 100.00 % 100.00 % Global Energy Pioneer B.V. Holding company Netherlands 100.00 % 100.00 % Mira Power Limited (*3) Power generation Pakistan 76.00 % 76.00 % KOSEP Material Co., Ltd. Recycling fly ashes Korea 86.22 % 86.22 % Commerce and Industry Energy Co., Ltd. (*4) RDF power generation Korea 85.03 % 85.03 % KEPCO KPS Philippines Corp. Utility plant maintenance and others Philippines 99.99 % 99.99 % KOSPO Chile SpA Holding company Chile 100.00 % 100.00 % PT. KOWEPO Sumsel Operation And Maintenance Services Utility plant maintenance and others Indonesia 95.00 % 95.00 % Hee Mang Sunlight Power Co., Ltd. Operation of utility plant Korea 100.00 % 100.00 % Fujeij Wind Power Company Operation of utility plant Jordan 100.00 % 100.00 % KOSPO Youngnam Power Co., Ltd. Operation of utility plant Korea 50.00 % 100.00 % Chitose Solar Power Plant LLC Power generation Japan 65.00 % 65.00 % KEPCO Energy Solution Co., Ltd. Energy service Korea 100.00 % 100.00 % KEPCO Solar Co., Ltd. Power generation Korea 100.00 % 100.00 % KOSPO Power Services Ltda. Utility plant maintenance and others Chile 65.00 % 65.00 % Energy New Industry Specialized Investment Private Investment Trust Holding company Korea 99.01 % 99.01 % KOEN Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOMIPO Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOWEPO Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOSPO Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % EWP Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOWEPO Lao International Utility plant maintenance and others Laos 100.00 % 100.00 % KEPCO US Inc. Holding company USA 100.00 % —  KEPCO Mangilao Holdings LLC Holding company USA 100.00 % 100.00 % Mangilao Investment LLC Holding company USA 80.06 % 80.06 % KEPCO Mangilao Solar, LLC Power generation USA 100.00 % 100.00 % Jeju Hanlim Offshore Wind Co., Ltd. Power generation Korea 79.03 % 79.03 % PT. Siborpa Eco Power Construction and operation of utility plant Indonesia 55.00 % 55.00 % BSK E-New Industry Fund VII Holding company Korea 81.67 % 81.67 % e-New Industry LB Fund 1 Holding company Korea 76.11 % 76.11 % Songhyun e-New Industry Fund Holding company Korea 80.65 % 80.65 % BSK E-New Industry Fund X Holding company Korea 66.80 % 66.80 % PT. Korea Energy Indonesia Utility plant maintenance and others Indonesia 95.00 % 95.00 % KOLAT SpA Utility plant maintenance and others Chile 100.00 % 100.00 % KEPCO California, LLC Holding company USA 100.00 % 100.00 % KEPCO Mojave Holdings, LLC Holding company USA 100.00 % 100.00 % Incheon Fuel Cell Co., Ltd. Power generation Korea 60.00 % 60.00 % Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   KOEN Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOMIPO Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOWEPO Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOSPO Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % EWP Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % PT. KOMIPO Energy Indonesia Utility plant maintenance and others Indonesia 95.00 % 95.00 % KNF Partners Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOSPO USA Inc. Holding company USA 100.00 % 100.00 % Nambu USA LLC Holding company USA 100.00 % 100.00 % Tamra Offshore Wind Power Co., Ltd. Power generation Korea 63.00 % 63.00 % KEPCO MCS Co., Ltd. Electric meter reading and others Korea 100.00 % 100.00 % KEPCO FMS Co., Ltd. Security service and others Korea 100.00 % 100.00 % Firstkeepers Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % Secutec Co., Ltd. Security service Korea 100.00 % 100.00 % SE Green Energy Co., Ltd. Power generation Korea 84.80 % 84.80 % Mangilao Intermediate Holdings LLC Holding company USA 100.00 % 100.00 % KEPCO CSC Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOAK Power Limited Hydro power facility maintenance Pakistan 100.00 % 100.00 % KOMIPO Europe B.V. Holding company Netherlands 100.00 % 100.00 % Haenanum Energy Fund Holding company Korea 99.64 % 99.64 % Paju Ecoenergy Co., Ltd. Power generation Korea 89.00 % 89.00 % Guam Ukudu Power LLC Power generation USA 100.00 % 100.00 % K-SOLAR SHINAN Co., Ltd. Power generation Korea 90.00 % 90.00 % KPS Partners Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KEPCO E&C Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % Moha solar Co., Ltd. Power generation Korea 100.00 % 100.00 % Ogiri Solar Power Co., Ltd. Power generation Korea 70.00 % 70.00 % KHNP USA LLC Holding company USA 100.00 % 100.00 % KOMIPO Vanphong Power Service LLC Utility plant maintenance and others Vietnam 100.00 % 100.00 % Energy Innovation Fund I Holding company Korea 71.91 % 71.91 % KHNP Chile SpA Holding company Chile 100.00 % 100.00 % Yeong Yang Apollon Photovoltaic Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Corporation Co., Ltd. Power generation Korea 100.00 % 100.00 % SolarVader Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Innovation Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Horus Photovoltaic Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Solar Management Co., Ltd. Power generation Korea 100.00 % 100.00 % LSG Hydro Power Limited Holding company Pakistan 99.80 % 99.80 % KOEN Bio Co., Ltd. Wood pellet utilization business Korea 70.00 % 70.00 % KOMIPO Energy Solution America, LLC Holding company USA 100.00 % 100.00 % Elara Investment Holdings, LLC (*5) Holding company USA 0.10 % 0.10 % Elara Equity Holdings, LLC Holding company USA 54.00 % 54.00 % Elara Class B Holdings, LLC Holding company USA 100.00 % 100.00 % Elara Class B Member, LLC Holding company USA 100.00 % 100.00 % Elara Development Holdings, LLC Holding company USA 100.00 % 100.00 % KOMIPO Development, LLC Holding company USA 100.00 % 100.00 % Elara Energy Holdings, LLC (*5) Holding company USA 43.94 % 43.94 % Elara Energy Project, LLC Power generation USA 100.00 % 100.00 % KOMIPO Iberian Solar Group, S.L.U. Holding company Spain 100.00 % 100.00 % Jeongam Wind Power Co., Ltd. Power generation Korea 80.00 % 80.00 % KOWEPO Europe B.V. Holding company Netherlands 100.00 % 100.00 % CVS Equity Holdings, LLC Holding company USA 81.34 % 81.34 % CVS Class B Holdings, LLC Holding company USA 100.00 % 100.00 % CVS Development Holdings, LLC Holding company USA 100.00 % 100.00 % CVS Development, LLC Holding company USA 100.00 % 100.00 % CVS Class B Member, LLC Holding company USA 100.00 % 100.00 % CVS Energy Holdings, LLC Holding company USA 70.79 % 70.79 % Concho Valley Energy, LLC Holding company USA 100.00 % 100.00 % Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   Concho Valley Solar, LLC Power generation USA 100.00 % 100.00 % Yeongdeok Sunrise Wind Power Co., Ltd. Power generation Korea 70.00 % 70.00 % KHNP Spain, S.L. Holding company Spain 100.00 % —  UI Carbon-Neutrality Fund Holding company Korea 78.97 % 78.97 % KA Power Limited Power generation Pakistan 100.00 % 100.00 % Western Power Changgi Solar Co., Ltd. Power generation Korea 100.00 % 100.00 % EWP Australia Pty., Ltd. Holding company Australia 100.00 % 100.00 % Columboola Solar Farm Hold Co Pty., Ltd. (*3,6) Holding company Australia 74.04 % 74.04 % Digital Innovation Growth Fund Holding company Korea 76.92 % 76.92 % J Wind First, LLC (*7) Company specializing in liquidization Korea —  —  KEPCO Holding Company Holding company Saudi Arabia 100.00 % 100.00 % KEPCO for Power Company Power generation Saudi Arabia 60.00 % —  KEPCO for Maintenance Company Utility plant maintenance and others Saudi Arabia 100.00 % 100.00 % KOSPO Trumbull LLC Holding company USA 100.00 % 100.00 % Changjuk Wind Power Co., Ltd. Power generation Korea 73.00 % 73.00 % Chile Solar JV SpA Power generation Chile —  100.00 % KEPCO KPS South Africa Pty., Ltd. Utility plant maintenance and others Republic of South Africa —  100.00 % KOWEPO Holding Limited Holding company United Arab —  100.00 % Magna Energy New Industrial Fund Holding company Korea —  82.00 % Columboola Solar Farm Nominees Pty., Ltd. (*3) Power generation Australia —  100.00 % Columboola Solar Farm Op Trust (*3) Power generation Australia —  100.00 % Columboola Solar Farm Fin Co Pty., Ltd. (*3) Holding company Australia —  100.00 % EWP ESS Holdings, LLC Holding company USA —  100.00 % Fairhaven ESS LLC Holding company USA —  100.00 % (*1) Considering treasury stocks, the effective ownership interest (*2) The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company obtained the majority of the voting power under the shareholders’ agreement. (*3) As of December 31, 2023, the annual reporting period of all subsidiaries ends on December 31, except for (*4) The Company guarantees a certain return on investments in Commerce and Industry Energy Co., Ltd. for the financial investors holding such investments. The financial investors have a right to claim the Company to sell its shares in the entity, which can be exercised 36 months after the date of acquisition. Accordingly, the purchase price including the return on investment is classified as a borrowing. (*5) The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company has control over the board of directors under the shareholders' agreement. (*6) Excluding preferred stocks, the percentage of ownership with voting rights is 100%. (*7) Although the Company does not hold a stake as of December 31, 2023, considering the purpose and design of the structured entity, the Company is exposed to volatility in the profits of the structured entity. In addition, Company has the ability to direct activities that can most significantly affect the operations of the structured entity, so it has been determined that the Company has control over the entity. (2) Subsidiaries newly included in and excluded from consolidation for the year ended December 31, 2023 are as follows: Subsidiaries included in consolidation during the year ended December 31, 2023. Subsidiaries Reason Chile Solar JV SpA Change in the scope of consolidation KEPCO KPS South Africa Pty., Ltd. New investment KOWEPO Holding Limited New investment Magna Energy New Industrial Fund New investment Columboola Solar Farm Nominees Pty., Ltd. New investment Columboola Solar Farm Op Trust New investment Columboola Solar Farm Fin Co Pty., Ltd. New investment EWP ESS Holdings, LLC New investment Fairhaven ESS LLC New investment Subsidiaries excluded from consolidation during the year ended December 31, 2023. Subsidiaries Reason KHNP Spain, S.L. Liquidation KEPCO for Power Company Change in the scope of consolidation KEPCO Lebanon SARL Under liquidation process KEPCO US Inc. Liquidation (3) Summary of financial information of consolidated subsidiaries as of and for the years ended December 31, 2022 and 2023 are as follows: 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won Korea Hydro & Nuclear Power Co., Ltd. ￦ 69,129,625 42,843,974 10,386,091 (16,382 ) Korea South-East Power Co., Ltd. 13,855,071 7,410,881 8,972,991 71,662 Korea Midland Power Co., Ltd. 16,062,605 10,776,943 8,629,165 (58,173 ) Korea Western Power Co., Ltd. 13,459,054 8,125,312 8,112,727 106,361 Korea Southern Power Co., Ltd. 14,011,354 8,296,983 9,304,362 (68,315 ) Korea East-West Power Co., Ltd. 12,079,954 5,818,789 6,925,094 2,888 KEPCO Engineering & Construction Company, Inc. 815,533 272,119 505,291 17,954 KEPCO Plant Service & Engineering Co., Ltd. 1,555,453 344,702 1,425,913 97,881 KEPCO Nuclear Fuel Co., Ltd. 949,455 490,215 304,405 31,508 KEPCO KDN Co., Ltd. 734,439 166,272 739,453 42,584 KEPCO International HongKong Ltd. 128,784 —  —  (216 ) KEPCO International Philippines Inc. 127,744 101 —  9,976 KEPCO Gansu International Ltd. 7,125 598 —  (22 ) KEPCO Philippines Holdings Inc. 191,634 129 —  39,346 KEPCO Philippines Corporation 3,799 14 —  102 KEPCO Ilijan Corporation 231,132 3,642 23,263 16,455 KEPCO Lebanon SARL 1,890 10,482 —  20 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won KEPCO Neimenggu International Ltd. ￦ 269,582 3,917 —  9,938 KEPCO Shanxi International Ltd. 597,635 222,186 —  (11,312 ) KOMIPO Global Pte Ltd. 388,071 1,817 —  58,030 KEPCO Netherlands B.V. 137,454 64 —  8,570 KEPCO Australia Pty., Ltd. 579 11 —  102 KOSEP Australia Pty., Ltd. 74,180 13,097 52,271 24,443 KOMIPO Australia Pty., Ltd. 81,216 10,327 52,272 23,368 KOWEPO Australia Pty., Ltd. 81,696 10,184 52,271 22,745 KOSPO Australia Pty., Ltd. 41,872 10,174 52,271 24,362 KEPCO Middle East Holding Company 116,731 102,054 —  (634 ) Qatrana Electric Power Company 513,277 247,027 24,354 22,578 KHNP Canada Energy Ltd. 107,200 6,218 —  149 KEPCO Bylong Australia Pty., Ltd. 44,034 437,852 —  (45,880 ) Korea Waterbury Uranium Limited Partnership 20,934 224 —  (116 ) KEPCO Holdings de Mexico 728 1,974 —  (1,363 ) KST Electric Power Company, S.A.P.I. de C.V. 653,830 528,315 232,893 23,122 KEPCO Energy Service Company 2,238 2,173 7,015 (211 ) KEPCO Netherlands S3 B.V. 71,326 16,419 —  4,465 PT. KOMIPO Pembangkitan Jawa Bali 15,753 3,232 22,488 3,668 PT. Cirebon Power Service 2,316 784 9,602 355 KOWEPO International Corporation —  10 —  —  KOSPO Jordan LLC 22,854 6,964 45,009 7,657 EWP America Inc. (*1) 47,775 2,595 21,717 4,337 KNF Canada Energy Limited 2,116 34 —  (59 ) EWP Barbados 1 SRL 395,067 901 3,230 34,260 Gyeonggi Green Energy Co., Ltd. 220,414 226,517 112,524 (26,004 ) PT. Tanggamus Electric Power 227,638 163,106 3,781 5,778 Gyeongju Wind Power Co., Ltd. 98,513 55,579 24,888 9,711 KOMIPO America Inc. (*2) 571,200 317,903 34,059 (3,293 ) PT. EWP Indonesia 93,390 5 —  4,100 KEPCO Netherlands J3 B.V. 135,213 63 —  19,396 Korea Offshore Wind Power Co., Ltd. 376,449 192,335 52,526 13,083 Global One Pioneer B.V. 135 41 —  (68 ) Global Energy Pioneer B.V. 320 40 —  (64 ) Mira Power Limited 416,750 310,529 57,135 12,394 KOSEP Material Co., Ltd. 3,985 662 4,589 775 Commerce and Industry Energy Co., Ltd. 79,172 32,147 31,068 (3,730 ) KEPCO KPS Philippines Corp. 5,294 600 5,232 1,004 KOSPO Chile SpA 159,500 70,037 —  (2,811 ) PT. KOWEPO Sumsel Operation And Maintenance Services 25 252 —  (94 ) Hee Mang Sunlight Power Co., Ltd. 5,877 2,606 862 304 Fujeij Wind Power Company 213,113 163,690 —  16,564 KOSPO Youngnam Power Co., Ltd. 425,000 312,831 568,224 10,878 Chitose Solar Power Plant LLC 109,964 94,366 14,384 1,615 KEPCO Energy Solution Co., Ltd. 317,392 6,147 33,638 138 KEPCO Solar Co., Ltd. 243,221 25,405 24,778 9,305 KOSPO Power Services Ltda. 6,722 4,762 17,911 (358 ) Energy New Industry Specialized Investment Private Investment Trust (*3) 451,762 4,338 24,725 7,093 KOEN Bylong Pty., Ltd. 11 119 —  (12 ) KOMIPO Bylong Pty., Ltd. 11 122 —  (33 ) KOWEPO Bylong Pty., Ltd. 8 94 —  (7 ) KOSPO Bylong Pty., Ltd. 25 148 —  (17 ) 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won EWP Bylong Pty., Ltd. ￦ 8 54 —  1 KOWEPO Lao International 8,248 87 10,010 11,185 KEPCO US Inc. 91 —  —  (19,181 ) KEPCO Mangilao Holdings LLC 112,948 40,558 21,743 21,166 Mangilao Investment LLC 258,674 4 —  (1 ) KEPCO Mangilao Solar, LLC 240,736 373 8,870 (14,818 ) Jeju Hanlim Offshore Wind Co., Ltd. 185,357 111,343 —  (3,546 ) PT. Siborpa Eco Power 12,050 3 —  (39 ) PT. Korea Energy Indonesia 1,675 80 1,937 (104 ) KOLAT SpA 48,787 3,701 1,647 1,888 KEPCO California, LLC 46,151 4,768 596 (670 ) KEPCO Mojave Holdings, LLC 95,550 75,846 —  (4,705 ) Incheon Fuel Cell Co., Ltd. 268,063 242,176 107,193 (5,323 ) KOEN Service Co., Ltd. 9,353 7,035 36,340 356 KOMIPO Service Co., Ltd. 6,597 4,503 35,031 905 KOWEPO Service Co., Ltd. 6,266 3,130 34,031 171 KOSPO Service Co., Ltd. 6,672 5,048 28,321 60 EWP Service Co., Ltd. 3,756 2,507 24,526 581 PT. KOMIPO Energy Indonesia 2,978 368 1,698 83 KNF partners Co., Ltd. 2,285 1,053 5,997 293 KOSPO USA Inc. 315,018 430 —  5,024 Nambu USA LLC 297,516 —  —  670 Tamra Offshore Wind Power Co., Ltd. 133,598 93,639 18,332 5,316 KEPCO MCS Co., Ltd. 114,316 52,241 363,627 8,468 KEPCO FMS Co., Ltd. 16,852 11,667 105,339 2,176 Firstkeepers Co., Ltd. 16,448 12,912 84,620 2,482 Secutec Co., Ltd. 12,578 9,209 69,383 690 SE Green Energy Co., Ltd. 149,189 114,241 49,873 1,304 Mangilao Intermediate Holdings LLC 236,266 116,426 —  (4,709 ) KEPCO CSC Co., Ltd. 10,668 8,937 46,559 (2,134 ) KOAK Power Limited 12,626 839 —  49 KOMIPO Europe B.V. 81,364 54 1,195 1,134 Haenanum Energy Fund 7,416 3 —  (48 ) Paju Ecoenergy Co., Ltd. 61,930 3,066 20,718 1,290 Guam Ukudu Power LLC 293,422 323,292 —  (31,410 ) K-SOLAR SHINAN Co., Ltd. 320,227 296,141 16,980 3,690 KPS Partners Co., Ltd. 3,619 2,007 12,417 487 KEPCO E&C Service Co., Ltd. 5,676 1,897 16,180 1,493 Moha solar Co., Ltd. 29,096 31,359 169 (1,137 ) Ogiri Solar Power Co., Ltd. 1,033 23 —  (30 ) KHNP USA LLC 1,290 97 1,127 392 KOMIPO Vanphong Power Service LLC 15,940 3,333 20,233 9,871 Energy Innovation Fund I 35,310 445 —  (961 ) KHNP Chile SpA 5,547 4,147 —  (16 ) Yeong Yang Apollon Photovoltaic Co., Ltd. 1,566 1,507 254 (82 ) Yeong Yang Corporation Co., Ltd. 1,559 1,497 251 (91 ) SolarVader Co., Ltd. 1,568 1,500 256 (78 ) Yeong Yang Innovation Co., Ltd. 1,557 1,497 244 (91 ) Yeong Yang Horus Photovoltaic Co., Ltd. 1,552 1,498 243 (93 ) Yeong Yang Solar Management Co., Ltd. 1,573 1,500 262 (75 ) 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won LSG Hydro Power Limited ￦ 1,144 1,159 —  (18 ) KOEN Bio Co., Ltd. 261 219 639 (150 ) KOMIPO Iberian Solar Group, S.L.U. 78,094 65,012 —  (1,304 ) Jeongam Wind Power Co., Ltd. 81,800 68,317 10,722 892 KOWEPO Europe B.V. 42,865 2,422 —  1,668 Yeongdeok Sunrise Wind Power Co., Ltd. 42,187 22,031 —  (328 ) KHNP Spain, S.L. 3 —  —  (1 ) KA Power Limited 3,937 418 —  442 Western Power Changgi Solar Co., Ltd. 48,770 44,647 3,447 (354 ) EWP Australia Pty., Ltd. 51,105 —  —  15,203 Columboola Solar Farm Hold Co Pty., Ltd. 310,271 214,792 2,228 2,884 Digital Innovation Growth Fund 12,594 100 —  (363 ) J Wind First, LLC 33,611 33,611 450 —  KEPCO Holding Company 3,273 17 —  (18 ) KEPCO for Power Company 57,501 58,441 —  (960 ) KEPCO for Maintenance Company —  —  —  —  KOSPO Trumbull LLC 37 3 —  —  Changjuk Wind Power Co., Ltd. 29,208 3,137 9,027 3,503 (*1) Financial information of EWP America Inc. includes that of two other subsidiaries, EWP Renewable Corporation, and California Power Holdings, LLC. (*2) Financial information of KOMIPO America Inc. includes that of 17 other subsidiaries including Elara Equity Holdings, LLC and CVS Equity Holdings, LLC. (*3) Financial information of Energy New Industry Specialized Investment Private Investment Trust includes that of five other subsidiaries, BSK E-New Industry Fund VII, e-New Industry LB Fund 1, Songhyun e-New Industry Fund, BSK E-New Industry Fund X, and UI Carbon-Neutrality Fund. 2023 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the period In millions of won Korea Hydro & Nuclear Power Co., Ltd. ￦ 70,535,018 45,660,916 10,798,378 151,638 Korea South-East Power Co., Ltd. 13,158,245 6,964,695 7,761,713 196,522 Korea Midland Power Co., Ltd. 15,309,205 10,368,698 7,611,821 (1,844 ) Korea Western Power Co., Ltd. 12,710,246 7,648,441 6,915,233 126,519 Korea Southern Power Co., Ltd. 13,405,076 7,807,334 7,298,989 226,811 Korea East-West Power Co., Ltd. 11,683,112 5,626,034 5,571,885 139,013 KEPCO Engineering & Construction Company, Inc. 854,704 307,396 545,092 32,654 KEPCO Plant Service & Engineering Co., Ltd. 1,585,380 318,597 1,523,031 161,849 KEPCO Nuclear Fuel Co., Ltd. 1,101,960 622,157 284,066 43,533 KEPCO KDN Co., Ltd. 733,434 301,713 738,833 65,495 KEPCO International HongKong Ltd. 133,915 —  —  8,795 KEPCO International Philippines Inc. 72,830 —  —  4,891 KEPCO Gansu International Ltd. 7,226 608 —  (23 ) KEPCO Philippines Holdings Inc. 180,592 96 —  8,802 KEPCO Philippines Corporation 2,607 —  —  127 KEPCO Ilijan Corporation 142,711 800 —  3,718 KEPCO Neimenggu International Ltd. 284,280 4,346 —  15,021 KEPCO Shanxi International Ltd. 707,447 329,539 —  (3,875 ) KOMIPO Global Pte Ltd. 411,249 32,900 —  17,174 KEPCO Netherlands B.V. 141,088 45 —  3,856 KEPCO Australia Pty., Ltd. 749 34 —  131 KOSEP Australia Pty., Ltd. 79,308 7,990 29,675 10,665 KOMIPO Australia Pty., Ltd. 86,077 4,014 29,676 9,248 KOWEPO Australia Pty., Ltd. 86,074 3,571 29,675 9,001 KOSPO Australia Pty., Ltd. 32,828 3,923 29,675 10,329 KEPCO Middle East Holding Company 121,015 107,611 —  (1,548 ) Qatrana Electric Power Company 491,627 208,707 26,779 20,949 KHNP Canada Energy Ltd. 155,242 12,379 —  392 KEPCO Bylong Australia Pty., Ltd. 44,557 465,231 —  (16,669 ) Korea Waterbury Uranium Limited Partnership 20,772 44 —  (67 ) KEPCO Holdings de Mexico 1,171 2,621 —  (121 ) KST Electric Power Company, S.A.P.I. de C.V. 631,348 490,470 93,843 19,657 KEPCO Energy Service Company 2,028 716 10,193 251 KEPCO Netherlands S3 B.V. 70,613 16,710 —  1,769 PT. KOMIPO Pembangkitan Jawa Bali 17,303 3,929 23,639 1,579 PT. Cirebon Power Service 2,936 714 9,457 672 KOWEPO International Corporation —  10 —  —  KOSPO Jordan LLC 19,387 3,881 17,665 7,082 EWP America Inc. (*1) 46,954 4,032 14,549 895 KNF Canada Energy Limited 2,261 34 —  (56 ) EWP Barbados 1 SRL 434,690 14,217 2,448 36,566 Gyeonggi Green Energy Co., Ltd. 180,176 214,822 80,630 (28,549 ) PT. Tanggamus Electric Power 214,892 150,483 2,127 (2,230 ) Gyeongju Wind Power Co., Ltd. 90,616 49,982 19,807 6,716 KOMIPO America Inc. (*2) 579,403 318,295 39,323 3,376 PT. EWP Indonesia 90,650 132 —  9,590 KEPCO Netherlands J3 B.V. 153,324 13,634 —  15,289 Korea Offshore Wind Power Co., Ltd. 334,444 143,827 40,313 6,497 2023 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the period In millions of won Global One Pioneer B.V. ￦ 143 44 —  (85 ) Global Energy Pioneer B.V. 336 44 —  (81 ) Mira Power Limited 403,843 318,557 2,683 (1,590 ) KOSEP Material Co., Ltd. 4,974 542 4,834 908 Commerce and Industry Energy Co., Ltd. 73,671 29,611 33,050 (2,901 ) KEPCO KPS Philippines Corp. 5,775 884 4,608 97 KOSPO Chile SpA 166,643 75,619 —  —  PT. KOWEPO Sumsel Operation And Maintenance Services 26 260 —  —  Hee Mang Sunlight Power Co., Ltd. 5,877 2,403 689 202 Fujeij Wind Power Company 216,082 158,081 —  15,067 KOSPO Youngnam Power Co., Ltd. 360,026 255,761 410,173 (7,965 ) Chitose Solar Power Plant LLC 98,911 84,228 14,447 2,059 KEPCO Energy Solution Co., Ltd. 322,529 15,367 14,151 5,384 KEPCO Solar Co., Ltd. 246,273 36,127 23,234 8,367 KOSPO Power Services Ltd. 6,976 7,086 17,634 (211 ) Energy New Industry Specialized Investment Private Investment Trust (*3) 454,888 3,364 24,030 10,812 KOEN Bylong Pty., Ltd. 11 128 —  —  KOMIPO Bylong Pty., Ltd. 13 147 —  (20 ) KOWEPO Bylong Pty., Ltd. 12 142 —  (43 ) KOSPO Bylong Pty., Ltd. 388 541 —  (20 ) EWP Bylong Pty., Ltd. 13 13 —  46 KOWEPO Lao International 13,038 223 10,270 6,268 KEPCO Mangilao Holdings LLC 90,445 41,898 775 785 Mangilao Investment LLC 206,714 15 —  (1 ) KEPCO Mangilao Solar, LLC 206,600 1,918 13,593 826 Jeju Hanlim Offshore Wind Co., Ltd. 459,229 388,171 —  (3,032 ) PT. Siborpa Eco Power 12,209 3 —  (52 ) PT. Korea Energy Indonesia 1,878 101 1,897 132 KOLAT SpA 46,958 352 2,237 1,820 KEPCO California, LLC 46,606 6,823 613 (385 ) KEPCO Mojave Holdings, LLC 93,233 78,328 —  (3,901 ) Incheon Fuel Cell Co., Ltd. 259,169 237,409 96,924 (4,112 ) KOEN Service Co., Ltd. 11,470 8,745 38,164 305 KOMIPO Service Co., Ltd. 7,944 4,777 37,525 960 KOWEPO Service Co., Ltd. 10,300 6,584 36,421 264 KOSPO Service Co., Ltd. 6,122 4,182 30,369 703 EWP Service Co., Ltd. 5,487 3,790 26,767 176 PT. KOMIPO Energy Indonesia 2,983 250 2,023 38 KNF partners Co., Ltd. 2,589 1,106 6,380 340 KOSPO USA Inc. 378,732 377 —  (6,351 ) Nambu USA LLC 297,370 230 —  (732 ) Tamra Offshore Wind Power Co., Ltd. 120,460 83,161 18,570 1,089 KEPCO MCS Co., Ltd. 111,189 73,940 307,146 (4,757 ) KEPCO FMS Co., Ltd. 21,310 18,142 107,336 1,895 Firstkeepers Co., Ltd. 18,698 12,437 90,575 2,689 Secutec Co., Ltd. 16,038 11,797 72,284 699 SE Green Energy Co., Ltd. 147,251 114,737 40,326 (1,305 ) Mangilao Intermediate Holdings LLC 206,771 114,954 —  (5,293 ) KEPCO CSC Co., Ltd. 15,985 12,170 49,502 2,644 KOAK Power Limited 15,000 528 —  714 KOMIPO Europe B.V. 86,109 69 1,183 109 2023 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the period In millions of won Haenanum Energy Fund ￦ 7,415 3 47 (1 ) Paju Ecoenergy Co., Ltd. 60,653 2,146 15,351 (357 ) Guam Ukudu Power LLC 749,837 720,795 —  (19,904 ) K-SOLAR 298,866 281,676 37,137 (6,896 ) KPS Partners Co., Ltd. 3,503 1,776 12,921 183 KEPCO E&C Service Co., Ltd. 7,167 1,938 16,454 1,505 Moha solar Co., Ltd. 27,213 29,363 —  112 Ogiri Solar Power Co., Ltd. 1,032 31 —  (9 ) KHNP USA LLC 1,517 140 1,142 166 KOMIPO Vanphong Power Service LLC 26,819 3,768 21,396 10,879 Energy Innovation Fund I 43,725 419 —  (766 ) KHNP Chile SpA 5,555 4,219 —  (66 ) Yeong Yang Apollon Photovoltaic Co., Ltd. 1,529 1,427 219 42 Yeong Yang Corporation Co., Ltd. 1,519 1,418 216 39 SolarVader Co., Ltd. 1,529 1,421 219 40 Yeong Yang Innovation Co., Ltd. 1,510 1,418 210 32 Yeong Yang Horus Photovoltaic Co., Ltd. 1,502 1,418 206 28 Yeong Yang Solar Management Co., Ltd. 1,540 1,420 224 46 LSG Hydro Power Limited 717 8 —  (219 ) KOEN Bio Co., Ltd. 1,010 585 2,467 372 KOMIPO Iberian Solar Group, S.L.U. 79,666 66,874 —  (931 ) Jeongam Wind Power Co., Ltd. 75,744 63,219 8,154 (958 ) KOWEPO Europe B.V. 107 3,177 —  (44,685 ) Yeongdeok Sunrise Wind Power Co., Ltd. 94,615 74,842 —  (383 ) KA Power Limited 3,173 172 —  126 Western Power Changgi Solar Co., Ltd. 46,950 40,815 7,036 2,011 EWP Australia Pty., Ltd. 52,734 —  325 337 Columboola Solar Farm Hold Co Pty., Ltd. (*4) 311,259 213,822 10,072 3,217 Digital Innovation Growth Fund 11,624 96 —  (266 ) J Wind First, LLC 52,304 52,304 2,540 —  KEPCO Holding Company 3,307 —  —  (23 ) KEPCO for Maintenance Company 118 —  —  (45 ) KOSPO Trumbull LLC 25 —  —  (10 ) Changjuk Wind Power Co., Ltd. 24,364 3,049 6,230 744 Chile Solar JV SpA 98,705 75,472 9,050 (2,768 ) KEPCO KPS South Africa Pty., Ltd. 9,222 4,236 8,512 834 KOWEPO Holding Limited 1,323 1,371 —  (49 ) (*1) Financial information of EWP America Inc. includes that of 4 other subsidiaries, EWP Renewable Corporation, and California Power Holdings LLC, EWP ESS Holdings, LLC, and Fairhaven ESS LLC. (*2) Financial information of KOMIPO America Inc. includes that of 17 other subsidiaries including Elara Equity Holdings, LLC and CVS Equity Holdings, LLC. (*3) Financial information of Energy New Industry Specialized Investment Private Investment Trust includes that of 6 other subsidiaries, BSK E-New e-New e-New E-New (*4) Financial information of Columboola Solar Farm Hold Co Pty., Ltd. includes that of 3 other subsidiaries including Columboola Solar Farm Nominees Pty., Ltd. (4) Significant restrictions on abilities to subsidiaries are as follows: Company Nature and extent of any significant restrictions Gyeonggi Green Energy Co., Ltd. Acquisition or disposal of assets of more than W KOSPO Youngnam Power Co., Ltd. Dividends may be payable Jeongam Wind Power Co., Ltd. Dividends may be payable when Incheon Fuel Cell Co., Ltd. Acquisition or disposal of assets of more than W Gyeongju Wind Power Co., Ltd. Dividends and settlement amounts for O&M and renewable energy certificate may be payable Korea Offshore Wind Power Co., Ltd. Principals and interest on subordinated loans or dividends and settlement amounts for renewable energy certificate may be payable interest may Jeju Hanlim Offshore Wind Co., Ltd. Prior approval from the lender is required when withdrawing funds (major expenditure, REC settlement, dividend payment, etc.) according to the loan agreement. Yeongdeok Sunrise Wind Power Co., Ltd. Dividends may be pay able Columboola Solar Farm Hold Co Pty., Ltd. Dividends may be payable Guam Ukudu Power LLC Dividends may be payable equity interest may KOSPO Trumbull LLC The Company’s equity interest may not Mira Power Limited The Company’s eq

Investments in Associates and J

Investments in Associates and Joint Ventures	12 Months Ended
	Dec. 31, 2023
Investments in Associates and Joint Ventures [Abstract]
Investments in Associates and Joint Ventures	17. Investments in Associates and Joint Ventures (1) Investments in associates and joint ventures as of December 31, 2022 and 2023 are as follows: 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> Korea Gas Corporation Importing and wholesaling LNG Korea 20.47% ￦ 94,500 2,085,296 Korea Electric Power Industrial Development Co., Ltd. Electricity metering and others Korea 29.00% 4,727 31,078 YTN Co., Ltd. (*1) Broadcasting Korea 21.43% 59,000 55,027 Gangwon Wind Power Co., Ltd. (*2) Power generation Korea 15.00% 5,725 12,158 Hyundai Green Power Co., Ltd. Power generation equipment consignment and operation service Korea 29.00% 88,885 119,791 Korea Power Exchange (*3) Management of power market and others Korea 100.00% 127,839 275,126 Taebaek Wind Power Co., Ltd. (*29) Power generation Korea 60.00% 11,494 14,501 Taebaek Guinemi Wind Power Co., Ltd. (*29) Power generation Korea 67.25% 12,637 13,049 Daeryun Power Co., Ltd. (*2) Power generation Korea 6.85% 40,854 26,727 KNH Solar Co., Ltd. Power generation Korea 27.00% 1,296 2,883 SPC Power Corporation (*30) Power generation Philippines 38.00% 20,635 70,868 Gemeng International Energy Co., Ltd. Power generation China 34.00% 413,153 578,821 PT. Cirebon Electric Power Power generation Indonesia 27.50% 40,365 135,114 KNOC Nigerian East Oil Co., Ltd. (*4) Resources development Nigeria 14.63% 12 —  KNOC Nigerian West Oil Co., Ltd. (*4) Resources development Nigeria 14.63% 12 —  PT Wampu Electric Power Power generation Indonesia 46.00% 21,292 37,743 PT. Bayan Resources TBK Resources development Indonesia 20.00% 615,860 684,719 S-Power Co., Ltd. Power generation Korea 49.00% 132,300 141,128 Pioneer Gas Power Limited Power generation India 38.50% 49,831 —  Eurasia Energy Holdings Power generation and resources development Russia 40.00% 461 —  Xe-Pian Xe-Namnoy Power Co., Ltd. Power generation Laos 25.00% 87,426 115,584 PT. Mutiara Jawa Manufacturing and operating floating coal terminal Indonesia 29.00% 2,978 3,597 Samcheok Eco Materials Co., Ltd. (*5) Recycling fly ashes Korea 2.35% 686 —  Noeul Green Energy Co., Ltd. Power generation Korea 29.00% 1,740 —  Goseong Green Power Co., Ltd. Power generation Korea 29.00% 262,740 288,893 Gangneung Eco Power Co., Ltd. (*2) Power generation Korea 1.61% 2,900 —  Shin Pyeongtaek Power Co., Ltd. Power generation Korea 40.00% 72,000 133,823 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Power generation Korea 28.00% 194 278 Dongducheon Dream Power Co., Ltd. (*6) Power generation Korea 33.61% 148,105 89,300 Jinbhuvish Power Generation Pvt. Ltd. (*2) Power generation India 5.16% 9,000 —  Daejung Offshore Wind Power Co., Ltd. Power generation Korea 46.59% 5,190 1,555 GS Donghae Electric Power Co., Ltd. Power generation Korea 34.00% 204,000 260,145 Daegu Photovoltaic Co., Ltd. Power generation Korea 29.00% 1,230 2,849 Busan Green Energy Co., Ltd. Power generation Korea 29.00% 5,243 4,395 Gunsan Bio Energy Co., Ltd. (*2) Power generation Korea 18.87% 1,000 —  Hansuwon KNP Co., Ltd. Electric material agency Korea 28.98% 537 280 Korea Electric Power Corporation Fund (*7) Developing electric enterprises Korea 98.09% 23,113 28,842 Energy Infra Asset Management Co., Ltd. (*2) Asset management Korea 9.90% 297 1,184 Daegu clean Energy Co., Ltd. Renewable power generation Korea 28.00% 140 12 Yaksu Installing ESS related equipment Korea 29.00% 210 486 Nepal Water & Energy Development Company Private Limited (*8) Construction and operation of utility plant Nepal 69.06% 70,228 69,940 Gwangyang Green Energy Co., Ltd. Power generation Korea 20.00% 26,800 25,044 PND S Power generation Korea 29.00% 1,250 1,403 Hyundai Eco Energy Co., Ltd. (*2) Power generation Korea 19.00% 3,610 7,631 YeongGwang Yaksu Wind Electric Co., Ltd. (*2) Power generation Korea 9.63% 533 156 Green Energy Electricity Generation Co., Ltd. Power generation Korea 29.00% 1,189 1,571 Korea Energy Solutions Co., Ltd. R & D Korea 20.00% 300 93 ITR Co., Ltd. R & D Korea 20.00% 50 —  2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Technical testing and consulting Korea 20.00% ￦ 25 366 Namjeongsusang Solar Power Operation Co., Ltd. (*9) Power generation Korea 15.00% 969  373 Indeck Niles Development, LLC Power generation USA 50.00% 263,825 302,038 Indeck Niles Asset Management, LLC Power generation USA 33.33% —  94 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 Holding company Korea 49.00% 6,910 6,932 Suwon New Power Co., Ltd. Power generation Korea 39.90% 798 919 Gwangbaek Solar Power Investment Co., Ltd. Power generation Korea 44.00% 4,757 5,133 Go deok Clean Energy Co., Ltd. Fuel cell generation Korea 40.00% 5,560 4,420 SureDataLab Co., Ltd. R & D Korea 23.95% 126 177 SEP Co., Ltd. R & D Korea 21.26% 27 —  Hankook Electric Power Information Co., Ltd. (*13) R & D Korea 16.49% 38 220 Tronix Co., Ltd. (*13) R & D Korea 12.50% 75 66 O2&B Global Co., Ltd. R & D Korea 20.00% 25 36 Muan Sunshine Solar Power Plant Co., Ltd. Power generation Korea 20.00% 1,570 2,562 Bigeum Resident Photovoltaic Power Co., Ltd. Power generation Korea 29.90% 1 —  Goesan Solar Park Co., Ltd. Power generation Korea 29.00% 1,276 2,591 Saemangeum Heemang Photovoltaic Co., Ltd. Power generation Korea 35.00% 11,022 13,010 Bitgoel Eco Energy Co., Ltd. Power generation Korea 49.25% 7,880 8,951 Jeju Gimnyeong Wind Power Co., Ltd. Power generation Korea 30.00% 714 872 Seoroseoro Sunny Power Plant Co., Ltd. Power generation Korea 42.58% 706 859 Muan Solar park Co., Ltd. Power generation Korea 20.00% 4,400 7,838 YuDang Solar Co., Ltd. Power generation Korea 20.00% 360 586 Anjwa Smart Farm & Solar City Co., Ltd. Power generation Korea 20.00% 5,651 8,662 Daewon Green Energy Co., Ltd. Power generation Korea 25.36% 3,910 4,485 G.GURU Co., Ltd. R & D Korea 24.65% 493 300 UD4M Co., Ltd. (*10) R & D Korea 12.50% 75 161 Dongbu Highway Solar Co., Ltd. Power generation Korea 20.00% 190 352 Seobu Highway Solar Co., Ltd. Power generation Korea 20.00% 195 316 Korea Energy Data Co., Ltd. R & D Korea 29.37% 60 62 Gangneung Sacheon Fuel Cell Co., Ltd. Power generation Korea 41.00% 5,695 4,277 KOSTURE Co., Ltd. (*2) Coal recycling business Korea 0.82% 1 1 Taebaek Gadeoksan Wind Power Co., Ltd. Power generation Korea 34.00% 12,570 20,040 Chuncheon Green Energy Co., Ltd. Power generation Korea 45.00% 9,540 9,155 Yeomsubong Wind Power Co., Ltd. (*11) Power generation Korea 3.81% 95 62 Yeongyang Wind Power Corporation II Power generation Korea 30.00% 7,965 7,461 Haeparang Energy Co., Ltd. Power generation Korea 25.00% 2,241 2,188 Saemangeum Sebit Power Plant Co., Ltd. (*12) Power generation Korea 63.33% 13,788 23,199 Boulder Solar III, LLC Power generation USA 30.00% 715 744 PlatformN. Co., Ltd. R & D Korea 29.58% 105 84 PT. Cirebon Energi Prasarana (*9) Power generation Indonesia 10.00% 26,710 69,035 Green Radiation Co., Ltd. (*13) R & D Korea 10.00% 20 11 Future Convergence Technology Laboratory. Co., Ltd. R & D Korea 20.12% 76 50 SC E&G. Co,. Ltd. R & D Korea 20.00% 90 214 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) R & D Korea 20.00% 81 166 ACE R & D Korea 20.00% 20 20 Environment and Energy Co., Ltd. (*13) R & D Korea 10.54% 11 10 Santiago Solar Power SpA Power generation Chile 50.00% 13,851 13,373 Yanggu Floating Photovoltaic Power Plant Inc. Power generation Korea 29.00% 904 903 ￦ 3,089,683 5,844,464 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> KEPCO-Uhde Inc. (*14) Power generation Korea 52.80% ￦ 11,355 17 Shuweihat Asia Power Investment B.V. Holding company Netherlands 49.00% 44,405 66,452 Shuweihat Asia Operation & Maintenance Company (*14) Maintenance of utility plant Cayman 55.00% 30 1,631 Waterbury Lake Uranium L.P. (*15) Resources development Canada 32.59% 26,602 21,750 ASM-BG Investicii AD Power generation Bulgaria 50.00% 9,846 14,555 RES Technology AD Power generation Bulgaria 50.00% 11,922 15,133 KV Holdings, Inc. (*30) Power generation Philippines 40.00% 2,103 9,659 KEPCO SPC Power Corporation (*14,30) Construction and operation of utility plant Philippines 75.20% 94,579  179,594 Gansu Datang Yumen Wind Power Co., Ltd. Power generation China 40.00% 16,621 6,024 Datang Chifeng Renewable Power Co., Ltd. Power generation China 40.00% 121,928 191,982 Datang KEPCO Chaoyang Renewable Power Co., Ltd. Power generation China 40.00% 39,872 44,398 Rabigh Electricity Company Power generation Saudi arabia 40.00% 109,743 214,607 Rabigh Operation & Maintenance Company Limited Maintenance of utility plant Saudi arabia 40.00% 70 5,113 Jamaica Public Service Company Limited Power generation Jamaica 40.00% 301,910 331,407 KW Nuclear Components Co., Ltd. Manufacturing Korea 45.00% 833 17,090 Busan Shinho Solar Power Co., Ltd. Power generation Korea 25.00% 2,100 6,719 Global Trade Of Power System Co., Ltd. (*16) Exporting products and technology of small or medium business by proxy Korea 29.00% 290 698 Expressway Solar-light Power Generation Co., Ltd. (*17) Power generation Korea 50.00% 1,856 4,754 Amman Asia Electric Power Company (*14) Power generation Jordan 60.00% 111,476 220,254 KAPES, Inc. (*14) R & D Korea 51.00% 5,629 —  Honam Wind Power Co., Ltd. Power generation Korea 29.00% 3,480 4,819 Korea Power Engineering Service Co., Ltd. Construction and service Korea 29.00% 290 5,543 Chun-cheon Energy Co., Ltd. Power generation Korea 29.90% 52,700 32,044 Yeonggwangbaeksu Wind Power Co., Ltd. (*16) Power generation Korea 15.00% 3,000 3,151 Nghi Son 2 Power LLC Power generation Vietnam 50.00% 175,261 408,839 Kelar S.A. (*14) Power generation Chile 65.00% 78,060 117,137 PT. Tanjung Power Indonesia Power generation Indonesia 35.00% 57,039 92,907 Incheon New Power Co., Ltd. (*18) Power generation Korea 29.00% 461 198 Seokmun Energy Co., Ltd. Power generation Korea 29.00% 15,370 17,336 Daehan Wind Power PSC Power generation Jordan 50.00% 7,493 13,923 Barakah One Company (*19) Power generation UAE 18.00% 118 —  Nawah Energy Company (*19) Operation of utility plant UAE 18.00% 296 315 MOMENTUM International thermonuclear experimental reactor construction management France 33.33% 1 345 Daegu Green Power Co., Ltd. (*20) Power generation Korea 29.00% 46,225 29,360 Yeonggwang Wind Power Co., Ltd. Power generation Korea 46.00% 17,475 20,713 Chester Solar IV SpA Power generation Chile 45.00% 1,700 181 Chester Solar V SpA Power generation Chile 45.00% 525 156 Diego de Almagro Solar SpA Power generation Chile 45.00% 2,091 540 South Jamaica Power Company Limited Power generation Jamaica 20.00% 20,430 46,437 Daesan Green Energy Co., Ltd. Power generation Korea 35.00% 17,850 19,218 RE Holiday Holdings LLC Power generation USA 50.00% 42,948 85,370 RE Pioneer Holdings LLC Power generation USA 50.00% 27,891 55,172 RE Barren Ridge 1 Holdings LLC Power generation USA 50.00% 28,021 3,350 RE Astoria 2 LandCo LLC Power generation USA 50.00% 5,188 6,599 RE Barren Ridge LandCo LLC Power generation USA 50.00% 2,187 2,333 Laurel SpA Power generation Chile 45.00% 1,222 554 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd (*16) Power generation Australia 12.37% 4,095 3,651 Chile Solar JV SpA Power generation Chile 50.00% 12,674 9,819 Cheong-Song Noraesan Wind Power Co., Ltd. (*15) Power generation Korea 29.01% 3,200 4,263 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> Chester Solar I SpA Power generation Chile 45.00% ￦ 1,181 1,314 Solar Philippines Calatagan Corporation Power generation Philippines 38.00% 47,903 56,902 Saemangeum Solar Power Co., Ltd. (*21) Power generation Korea 81.01% 26,400 23,551 Chungsongmeon BongSan wind power Co., Ltd. (*16) Power generation Korea 29.00% 2,900 3,470 Jaeun Resident Wind Power Plant Co., Ltd. (*16) Power generation Korea 29.00% 2,494 2,236 DE Energia SpA Power generation Chile 49.00% 8,364 9,536 Dangjin Eco Power Co., Ltd. Power generation Korea 34.00% 25,661 26,859 Haemodum Solar Co., Ltd. Power generation Korea 49.00% 2,940 3,367 Yangyang Wind Power Co., Ltd. Power generation Korea 50.00% 12,000 10,864 HORUS SOLAR, S.A. DE C.V. (*22) Renewable power generation Mexico 14.95% 5,068 6,976 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. (*22) Renewable power generation Mexico 14.95% 3,678 4,899 SUNMEX RENOVABLES, S.A. DE C.V. (*22) Renewable power generation Mexico 14.95% 1,678 1,657 Stavro Holding II A.B. Holding company Sweden 20.00% 18,566 17,171 Solaseado Solar Power Co., Ltd. Power generation Korea 39.00% 7,020 16,233 Yeongam Solar Power Co., Ltd. (*16) Power generation Korea 19.00% 6,460 9,879 Samsu Wind Power Co., Ltd. (*16) Power generation Korea 19.00% 2,637 3,205 Pulau Indah Power Plant Sdn. Bhd. Power generation Malaysia 25.00% 23,833 26,814 NH-Amundi Global Infrastructure Investment Private Investment Trust 21 Holding company Korea 29.53% 20,061 21,723 Shin-han BNPP Private Investment Trust for East-West Sunlight Dream (*14) Holding company Korea 90.00% 15,012 15,587 PT Barito Wahana Tenaga Power generation Indonesia 30.61% 59,574 137,047 Cheongna Energy Co., Ltd. (*21) Generating and distributing vapor and hot/cold water Korea 50.10% 49,344 10,758 Naepo Green Energy Co., Ltd. Power generation Korea 29.20% 29,200 —  Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) (*23) Power generation Korea 30.66% 71,070 —  OneEnergy Asia Limited Power generation Vietnam 40.00% 115,949 172,218 KAS INVESTMENT I LLC (*15) Holding company USA 29.89% 23,437 18,247 KAS INVESTMENT II LLC (*15) Holding company USA 29.89% 23,343 18,173 Energyco Co., Ltd. Power generation Korea 29.00% 1,659 2,190 CAES, LLC Holding company USA 36.00% 19,414 20,805 Hapcheon Floating Photovoltaic Power Plant Inc. (*16) Power generation Korea 49.00% 7,512 8,471 Busan Industrial Solar Power Co., Ltd. Power generation Korea 28.02% 510 1,168 Bitsolar Energy Co., Ltd. Power generation Korea 27.10% 352 352 Pulau Indah O&M Sdn. Bhd. (*24) Power generation Malaysia 60.00% —  —  Guadalupe Solar SpA (*24) Power generation Chile 60.00% 1,397 913 Omisan Wind Power Co., Ltd. Power generation Korea 42.00% 10,752 10,411 Foresight Iberian Solar Group Holding, S.L. (*24) Power generation Spain 75.00% 11,465 10,565 Yeongwol Eco Wind Co., Ltd. Power generation Korea 29.00% 3,089 3,155 Gurae Resident Power Co., Ltd. Power generation Korea 29.00% 386 391 Cheongju Eco Park Co., Ltd. Power generation Korea 29.00% 5,858 10,490 Enel X Midland Photovoltaic, LLC Power generation Korea 20.00% 1,695 1,856 Geumsungsan Wind Power Co., Ltd. Power generation Korea 29.00% 6,531 3,493 KEPCO KPS CARABAO Corp. (*18) Utility plant maintenance Philippines 40.00% 93 177 Prime Swedish Holding AB Holding company Sweden 45.00% 35,410 36,245 Goheung New Energy Co., Ltd. Power generation Korea 46.15% 12,959 11,832 Gunsan Land Solar Co., Ltd. (*24) Power generation Korea 75.29% 19,091 27,544 CapMan Lynx SCA, SICAR Holding company Luxembourg 50.00% 9,601 —  International Offshore Power Transmission Holding Company Limited Undersea transmission network operation UAE 35.00% —  —  Pyeongchang Wind Power Co., Ltd. (*28) Power generation Korea 58.00% 9,329 14,464 Eumseong Eco Park Co., Ltd. Power generation Korea 29.00% 5,741 5,557 Songsan Green Energy Co., Ltd. (*15) Fuel cell generation Korea 25.00% 1,400 1,387 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> Changwon Nu-ri Energy Co., Ltd. (*15) Fuel cell generation Korea 33.33% ￦ 500 497 Hasami Wind Farm Corporation Power generation Korea 29.00% 1,596 1,589 PungBack Wind Farm Corporation (*26) Power generation Korea 32.89% 7,885 6,743 Trumbull Asset Management, LLC (*27) Holding company USA 78.00% —  246 S-Power Chile SpA Power generation Chile 50.00% 127 127 Seungmun Green Energy Power generation Korea 33.00% 8,973 9,054 Seobusambo highway photovoltaics Co., Ltd. (*25) Power generation Korea 80.00% 3,020 3,066 2,332,579 3,147,584 ￦ 5,422,262 8,992,048 (*1) The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022. (*2) The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors. (*3) The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity. (*4) The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity. (*5) Although the nominal percentage of ownership is 2.35%, the effective percentage of ownership is 25.54%, considering redeemable convertible preferred stock as a liability component. (*6) The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock. (*7) The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate. (*8) The effective percentage of ownership is more than 50% but the Company does not hold control over the entity according to the shareholders’ agreement. Accordingly, the entity is classified as an associate. (*9) The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation. (*10) The effective percentage of ownership is 14.29% due to the acquisition of treasury stocks. The effective percentage of ownership is less than 20%. However, the Company exercises significant influence over the decisions related to finance and operation by virtue of right to nominate directors to the board of directors of the entity. (*11) The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation. (*12) The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate. (*13) The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity. (*14) The effective percentage of ownership is more than 50%. However, according to the shareholders’ agreement, all critical financial and operating decisions must be agreed to by all ownership parties and the Company can exercise same voting rights as other shareholders at the board of directors. Accordingly, the entities are classified as joint ventures. (*15) The effective percentage of ownership is less than 50%. However, the entity is classified as a joint venture, because all consent was required to make decisions on related activities. (*16) According to the shareholders’ agreement, the parties have joint control over all decisions related to finance and operation. Accordingly, the entity is classified as joint ventures. (*17) The effective percentage of ownership increased due to the disproportionate capital reduction of financial investors during the year ended December 31, 2022. (*18) The joint arrangement which the Company has joint control is structured through a separate company. The parties have joint control over the joint arrangement are classified as joint ventures, judging that they have rights to the net assets of the arrangement. (*19) The effective percentage of ownership is less than 20%. However, decisions in relevant activities must be agreed by ownership parties. Accordingly, the entity is classified as joint ventures. (*20) Although the nominal percentage of ownership is 29%, the effective percentage of ownership is 54.24%, considering the interest of financial investors as a liability component. (*21) The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture. (*22) The effective percentage of ownership is less than 20%. However, according to the shareholders' agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the Company can exercise significant influence. (*23) According to the Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders’ agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture. (*24) The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture. (*25) Due to the changes in the agreement, the Company lost its control over the entity. Accordingly, the entity is reclassified to a joint venture from a subsidiary. Although the effective percentage of ownership is more than 50%, decisions in relevant activities must be agreed by all members of the board of directors. (*26) The effective percentage of ownership is 37%, considering potential common stock. (*27) The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture. (*28) After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture. (*29) After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating (*30) T T 2023 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> Korea Gas Corporation Importing and wholesaling LNG Korea 20.47 % W 94,500 1,970,643 Korea Electric Power Industrial Development Co., Ltd. Electricity metering and others Korea 29.00 % 4,727 29,500 YTN Co., Ltd. (*1) Broadcasting Korea 21.43 % 59,000 52,303 Gangwon Wind Power Co., Ltd. (*2) Power generation Korea 15.00 % 5,725 12,001 Hyundai Green Power Co., Ltd. Power generation equipment consignment and operation service Korea 29.00 % 88,885 118,173 Korea Power Exchange (*3) Management of power market and others Korea 100.00 % 127,839 274,286 Taebaek Guinemi Wind Power Co., Ltd. (*28) Power generation Korea 67.25 % 12,637 13,530 Daeryun Power Co., Ltd. (*2) Power generation Korea 6.85 % 46,373 26,834 KNH Solar Co., Ltd. Power generation Korea 27.00 % 1,296 3,194 SPC Power Corporation (*29) Power generation Philippines 38.00 % 20,635 78,931 Gemeng International Energy Co., Ltd. Power generation China 42.00 % 516,007 705,812 PT. Cirebon Electric Power Power generation Indonesia 27.50 % 40,365 134,259 KNOC Nigerian East Oil Co., Ltd. (*4) Resources development Nigeria 14.63 % 12 —  KNOC Nigerian West Oil Co., Ltd. (*4) Resources development Nigeria 14.63 % 12 —  PT Wampu Electric Power Power generation Indonesia 46.00 % 21,292 34,555 PT. Bayan Resources TBK Resources development Indonesia 20.00 % 615,860 619,207 S-Power Power generation Korea 49.00 % 132,300 162,765 Pioneer Gas Power Limited Power generation India 38.50 % 49,831 —  Xe-Pian Xe-Namnoy Power generation Laos 25.00 % 87,426 116,378 PT. Mutiara Jawa Manufacturing and operating floating coal terminal Indonesia 29.00 % 2,978 5,168 Samcheok Eco Materials Co., Ltd. (*5) Recycling fly ashes Korea 25.54 % 686 —  Noeul Green Energy Co., Ltd. Power generation Korea 29.00 % 1,740 —  Goseong Green Power Co., Ltd. Power generation Korea 29.00 % 262,740 287,624 Gangneung Eco Power Co., Ltd. (*17) Power generation Korea 29.00 % 261,000 254,929 Shin Pyeongtaek Power Co., Ltd. Power generation Korea 40.00 % 72,000 145,026 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Power generation Korea 28.00 % 194 294 Dongducheon Dream Power Co., Ltd. (*6) Power generation Korea 33.61 % 148,105 87,203 Jinbhuvish Power Generation Pvt. Ltd. (*2) Power generation India 5.16 % 9,000 —  Daejung Offshore Wind Power Co., Ltd. Power generation Korea 46.59 % 5,190 1,483 GS Donghae Electric Power Co., Ltd. Power generation Korea 34.00 % 204,000 259,085 Daegu Photovoltaic Co., Ltd. Power generation Korea 29.00 % 1,230 2,804 Busan Green Energy Co., Ltd. Power generation Korea 29.00 % 5,243 3,259 Hansuwon KNP Co., Ltd. Electric material agency Korea 28.98 % 537 467 Korea Electric Power Corporation Fund (*7) Developing electric enterprises Korea 98.09 % 20,847 23,421 Energy Infra Asset Management Co., Ltd. (*33) Asset management Korea 9.90 % 297 1,213 Daegu clean Energy Co., Ltd. Renewable power generation Korea 28.00 % 140 —  Yaksu Installing ESS related equipment Korea 29.00 % 210 285 Nepal Water & Energy Development Company Private Limited (*8,17) Construction and operation of utility plant Nepal 68.88 % 110,332 110,573 Gwangyang Green Energy Co., Ltd. Power generation Korea 20.00 % 26,800 24,638 PND S Power generation Korea 29.00 % 1,250 1,510 Hyundai Eco Energy Co., Ltd. (*2) Power generation Korea 19.00 % 3,610 7,947 YeongGwang Yaksu Wind Electric Co., Ltd. (*2) Power generation Korea 9.63 % 533 133 Green Energy Electricity Generation Co., Ltd. Power generation Korea 29.00 % 1,189 8 Korea Energy Solutions Co., Ltd. R & D Korea 20.00 % 300 170 ITR Co., Ltd. (*32) R & D Korea 10.00 % 50 —  STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Technical testing and consulting Korea 20.00 % 25 391 Indeck Niles Development, LLC Power generation USA 50.00 % 263,825 335,401 Indeck Niles Asset Management, LLC Power generation USA 33.33 % —  93 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 Holding company Korea 49.00 % 6,482 6,496 Suwon New Power Co., Ltd. Power generation Korea 39.90 % 798 1,022 2023 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> Gwangbaek Solar Power Investment Co., Ltd. Power generation Korea 44.00 % W 4,757 5,155 Go deok Clean Energy Co., Ltd. Fuel cell generation Korea 40.00 % 5,560 4,723 SureDataLab Co., Ltd. R & D Korea 23.95 % 126 114 SEP Co., Ltd. R & D Korea 21.26 % 27 —  Hankook Electric Power Information Co., Ltd. (*13) R & D Korea 16.49 % 38 214 Tronix Co., Ltd. (*13) R & D Korea 12.50 % 75 220 O2&B Global Co., Ltd. R & D Korea 20.00 % 25 21 Muan Sunshine Solar Power Plant Co., Ltd. Power generation Korea 20.00 % 1,570 2,822 Bigeum Resident Photovoltaic Power Co., Ltd. Power generation Korea 29.90 % 1 —  Goesan Solar Park Co., Ltd. Power generation Korea 29.00 % 1,276 2,877 Saemangeum Heemang Photovoltaic Co., Ltd. Power generation Korea 35.00 % 11,022 14,420 Bitgoel Eco Energy Co., Ltd. Power generation Korea 49.25 % 7,880 12,394 Jeju Gimnyeong Wind Power Co., Ltd. Power generation Korea 30.00 % 714 246 Seoroseoro Sunny Power Plant Co., Ltd. Power generation Korea 42.58 % 706 941 Muan Solar park Co., Ltd. Power generation Korea 20.00 % 4,400 6,830 YuDang Solar Co., Ltd. Power generation Korea 20.00 % 360 570 Anjwa Smart Farm & Solar City Co., Ltd. Power generation Korea 20.00 % 5,651 7,665 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Power generation Korea 25.36 % 3,910 7,779 G.GURU Co., Ltd. R & D Korea 24.65 % 493 167 UD4M Co., Ltd. (*10) R & D Korea 12.50 % 75 150 Dongbu Highway Solar Co., Ltd. Power generation Korea 20.00 % 190 380 Seobu Highway Solar Co., Ltd. Power generation Korea 20.00 % 195 406 Korea Energy Data Co., Ltd. R & D Korea 29.37 % 60 36 Gangneung Sacheon Fuel Cell Co., Ltd. Power generation Korea 41.00 % 5,695 7,870 KOSTURE Co., Ltd. (*2) Coal recycling business Korea 4.42 % 7 8 Taebaek Gadeoksan Wind Power Co., Ltd. Power generation Korea 34.00 % 12,570 19,426 Chuncheon Green Energy Co., Ltd. Power generation Korea 45.00 % 9,540 8,900 Yeomsubong Wind Power Co., Ltd. (*11) Power generation Korea 29.00 % 1,411 871 Yeongyang Wind Power Corporation II Power generation Korea 30.00 % 7,965 10,100 Haeparang Energy Co., Ltd. Power generation Korea 25.00 % 2,241 2,104 Saemangeum Sebit Power Plant Co., Ltd. (*12) Power generation Korea 55.14 % 21,037 37,191 Boulder Solar III, LLC Power generation USA 30.00 % 715 754 PlatformN. Co., Ltd. R & D Korea 29.58 % 105 —  PT. Cirebon Energi Prasarana (*9) Power generation Indonesia 10.00 % 26,710 76,597 Green Radiation Co., Ltd. (*13) R & D Korea 10.00 % 20 26 Future Convergence Technology Laboratory. Co., Ltd. R & D Korea 20.12 % 76 36 Eco Motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.) R & D Korea 20.00 % 90 267 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) (*33) R & D Korea 16.67 % 81 120 ACE R & D Korea 20.00 % 25 2 Environment and Energy Co., Ltd. (*13) R & D Korea 10.54 % 11 9 Santiago Solar Power SpA Power generation Chile 50.00 % 13,851 11,769 Yanggu Floating Photovoltaic Power Plant Inc. Power generation Korea 29.00 % 904 760 Power Embedded R & D Korea 23.33 % 70 70 Changwon SG Energy Co., Ltd. (*13) Power generation Korea 18.78 % 900 783 Donpyung Technology. Co., Ltd. R & D Korea 20.00 % 125 254 HORANG ENERGY Inc. Power generation Korea 40.00 % 4,240 4,149 Hoenggye Renewable Energy Co., Ltd Power generation Korea 36.12 % 2,375 2,375 Haman Green Energy Co., Ltd. Power generation Korea 35.00 % 4,771 2,981 Songsan Green Energy Co., Ltd. (*21) Power generation Korea 60.00 % 8,400 8,323 W 3,509,099 6,176,889 2023 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> Shuweihat Asia Power Investment B.V. Holding company Netherlands 49.00 % W 44,405 69,902 Shuweihat Asia Operation & Maintenance Company (*14) Maintenance of utility plant Cayman 55.00 % 30 1,818 Waterbury Lake Uranium L.P. (*15) Resources development Canada 30.65 % 26,602 22,612 ASM-BG Power generation Bulgaria 50.00 % 9,846 14,739 RES Technology AD Power generation Bulgaria 50.00 % 11,922 14,383 KV Holdings, Inc. (*29) Power generation Philippines 40.00 % 2,103 5,186 KEPCO SPC Power Corporation (*14,29) Construction and operation of utility plant Philippines 75.20 % 94,579 196,544 Gansu Datang Yumen Wind Power Co., Ltd. Power generation China 40.00 % 16,621 6,315 Datang Chifeng Renewable Power Co., Ltd. Power gener

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [abstract]
Property, Plant and Equipment	18. Property, Plant and Equipment (1) Property, plant and equipment as of December 31, 2022 and 2023 are as follows: 2022 Acquisition cost Government grants Accumulated depreciation Accumulated losses Book value In millions of won Land ￦ 14,298,409 (27,405 ) —  (27,472 ) 14,243,532 Buildings 24,230,827 (50,437 ) (10,931,672 ) (6,955 ) 13,241,763 Structures 83,055,890 (165,608 ) (32,596,265 ) (10,390 ) 50,283,627 Machinery 108,749,243 (127,126) (54,015,594 ) (541,864 ) 54,064,659 Ships 17,264 —  (3,788 ) —  13,476 Vehicles 393,046 (2,045 ) (305,242 ) (117 ) 85,642 Equipment 2,168,348 (6,608 ) (1,732,564 ) (43 ) 429,133 Tools 1,306,509 (99 ) (1,128,002 ) (6 ) 178,402 Construction-in-progress 28,064,266 (135,926 ) —  (22,795 ) 27,905,545 Right-of-use 5,992,724 —  (2,281,599 ) —  3,711,125 Asset retirement costs 17,620,603 —  (6,185,214 ) (146,422 ) 11,288,967 Others 15,520,160 —  (13,100,723 ) —  2,419,437 ￦ 301,417,289     (515,254 ) (122,280,663 )    (756,064 ) 177,865,308 2023 Acquisition cost Government grants Accumulated depreciation Accumulated losses Book value In millions of won Land ￦ 14,426,253 (27,404 ) —  (28,165 ) 14,370,684 Buildings 25,236,830 (46,227 ) (11,870,875 ) (5,751 ) 13,313,977 Structures 86,010,823 (157,881 ) (35,111,297 ) (9,525 ) 50,732,120 Machinery 113,735,035 (119,824 ) (59,381,603 ) (536,386 ) 53,697,222 Ships 17,845 —  (5,480 ) —  12,365 Vehicles 421,349 (2,837 ) (337,859 ) (116 ) 80,537 Equipment 2,341,242 (5,932 ) (1,909,992 ) (375 ) 424,943 Tools 1,354,532 (62 ) (1,190,057 ) (1 ) 164,412 Construction-in-progress 32,031,297 (173,474 ) —  (22,795 ) 31,835,028 Right-of-use 6,041,794 —  (2,678,051 ) —  3,363,743 Asset retirement costs 17,007,088 —  (7,127,091 ) (146,423 ) 9,733,574 Others 16,255,667 —  (14,108,737 ) —  2,146,930 ￦ 314,879,755     (533,641 ) (133,721,042 )    (749,537 ) 179,875,535 (2) Changes in property, plant and equipment for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisition Disposal Depreciation Impairment Others Ending balance In millions of won Land ￦ 14,107,965 9,535 (49,377 ) —  —  202,814 14,270,937 (Government grants) (23,474 ) —  1 —  —  (3,932 ) (27,405 ) Buildings 12,926,226 3,202 (19,918 ) (906,528 ) (449 ) 1,289,667 13,292,200 (Government grants) (52,122 ) —  —  5,360 —  (3,675 ) (50,437 ) Structures 48,290,052 217,450 (277,308 ) (2,677,395 ) (3,669 ) 4,900,105 50,449,235 (Government grants) (172,021 ) —  1,250 9,568 —  (4,405 ) (165,608 ) Machinery 51,755,382 248,932 (188,924 ) (5,748,407 ) (33,191 ) 8,157,993 54,191,785 (Government grants) (140,082 ) —  405 17,283 —  (4,732 ) (127,126 ) Ships 177 —  —  (1,053 ) —  14,352 13,476 Vehicles 89,257 1,813 (88 ) (41,907 ) —  38,612 87,687 (Government grants) (1,675 ) —  —  663 —  (1,033 ) (2,045 ) Equipment 397,183 79,369 (183 ) (205,908 ) (1 ) 165,281 435,741 (Government grants) (149 ) —  —  494 —  (6,953 ) (6,608 ) Tools 183,065 25,291 (180 ) (77,902 ) —  48,227 178,501 (Government grants) (64 ) —  —  32 —  (67 ) (99 ) Construction-in-progress 30,156,094 11,671,907 (197,293 ) —  134,735 (13,723,972 ) 28,041,471 (Government grants) (111,822 ) 23,155 17 —  —  (47,276 ) (135,926 ) Right-of-use 4,059,397 197,016 (2,838 ) (509,068 ) —  (33,382 ) 3,711,125 Asset retirement costs 8,925,388 —  —  (1,133,866 ) —  3,497,445 11,288,967 Others 2,745,861 9,028 (22,531 ) (1,036,132 ) —  723,211 2,419,437 ￦ 173,134,638 12,486,698 (756,967) (12,304,766)     97,425 5,208,280 177,865,308 2023 Beginning Acquisition Disposal Depreciation Impairment(*) Others Ending balance In millions of won Land ￦ 14,270,937 23,519 (15,302 ) —  —  118,934 14,398,088 (Government grants) (27,405 ) —  1 —  —  —  (27,404 ) Buildings 13,292,200 3,706 (6,221 ) (938,549 ) —  1,009,068 13,360,204 (Government grants) (50,437 ) —  —  5,070 —  (860 ) (46,227 ) Structures 50,449,235 18,486 (311,877 ) (2,828,065 ) —  3,562,222 50,890,001 (Government grants) (165,608 ) —  1,611 9,562 —  (3,446 ) (157,881 ) Machinery 54,191,785 184,532 (195,673 ) (6,062,471 ) (6,331 ) 5,705,204 53,817,046 (Government grants) (127,126 ) —  1,230 17,413 —  (11,341 ) (119,824 ) Ships 13,476 —  —  (1,812 ) —  701 12,365 Vehicles 87,687 5,778 (76 ) (40,760 ) —  30,745 83,374 (Government grants) (2,045 ) —  —  960 —  (1,752 ) (2,837 ) Equipment 435,741 62,291 (264 ) (206,894 ) —  140,001 430,875 (Government grants) (6,608 ) —  —  2,011 —  (1,335 ) (5,932 ) Tools 178,501 30,598 (364 ) (78,487 ) —  34,226 164,474 (Government grants) (99 ) —  —  38 —  (1 ) (62 ) Construction-in-progress 28,041,471 14,069,968 (1,511 ) —  (10,700 ) (10,090,726 ) 32,008,502 (Government grants) (135,926 ) 5,544 —  —  —  (43,092 ) (173,474 ) Right-of-use assets 3,711,125 261,862 (2,613 ) (536,517 ) —  (70,114 ) 3,363,743 Asset retirement costs 11,288,967 —  —  (1,251,446 ) —  (303,947 ) 9,733,574 Others 2,419,437 1,290 —  (958,649 ) —  684,852 2,146,930 ￦ 177,865,308 14,667,574 (531,059 ) (12,868,596 )    (17,031 )   759,339 179,875,535 (*) The Company is in the process of calculating the actual damage in relation to Taean IGCC gas refinery fire incident in January 2023. For the year ended December 31, 2023, the Group recognized ￦6,331 million of estimated damage to its PP&E due to the fire incident as impairment loss, and the estimated damage may change depending on future investigations. In addition, as the recoverable amount of construction-in-progress of Guam Ukudu Power LLC, a subsidiary of the Group, is less than the book value, ￦10,700 million was recognized as an impairment loss during the year ended December 31, 2023. (3) The Company’s subsidiaries including Korea Hydro & Nuclear Power Co., Ltd. have recognized proceeds and costs from selling items produced before its intended use, by accounting ￦38,149 million (prior year : ￦94,264 million) as revenue and ￦45,578 (prior year : ￦63,405 million) as expense in profit or loss for the year ended December 31, 2023.

Investment Properties

Investment Properties	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about investment property [abstract]
Investment Properties	19. Investment Properties (1) Investment properties as of December 31, 2022 and 2023 are as follows: 2022 Acquisition Government Accumulated Book value In millions of won Land ￦ 194,417 —  —  194,417 Buildings 20,241 (21 ) (6,351 ) 13,869 ￦      214,658      (21 )     (6,351 )     208,286 2023 Acquisition Government Accumulated Book value In millions of won Land ￦ 172,594 —  —  172,594 Buildings 20,043 (22 ) (7,088 ) 12,933 ￦     192,637   (22 )   (7,088 )     185,527 (2) Changes in investment properties for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Disposal Depreciation Others Ending In millions of won Land ￦ 201,605   (208 ) —  (6,980 ) 194,417 Buildings 11,209 —  (487 )  3,168 13,890 (Government grants) (30 ) —      1 8 (21 ) ￦ 212,784 (208 ) (486 ) (3,804 ) 208,286 2023 Beginning Disposal Depreciation Others Ending In millions of won Land ￦ 194,417 —  —  (21,823 ) 172,594 Buildings 13,890 —  (494 ) (441 ) 12,955 (Government grants) (21 ) —  1 (2 ) (22 ) ￦ 208,286 —  (493 ) (22,266 ) 185,527 (3) Income and expenses related to investment properties for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Rental income ￦ 9,775 10,519 Operating and maintenance expenses related to rental income (587 ) (507 ) ￦  9,188 10,012 (4) Fair value of investment properties as of December 31, 2022 and 2023 are as follows: 2022 2023 Book value Fair value Book value Fair value In millions of won Land ￦ 194,417 292,827 172,594 258,478 Buildings 13,869 15,626 12,933 13,437 ￦ 208,286 308,453 185,527 271,915 The Company determined the fair value of investment property on the transition date based on valuations conducted by an independent valuation firm that is independent of the Company. The valuation firm has appropriate qualifications and experience in the valuation of real estate in the Republic of Korea, and the valuation was conducted using a comparison method, which is a method of obtaining economic value based on the marketability of the property. The fair values of the investment properties as of the reporting date were determined in consideration of the fluctuation on the publicly announced individual land price after the IFRS transition date (January 1, 2010). (5) All of the Company’s investment properties are held under freehold interests.

Construction Contracts

Construction Contracts	12 Months Ended
	Dec. 31, 2023
Construction Contracts [Abstract]
Construction Contracts	20. Construction Contracts (1) Changes in total contract amount in which revenue is not yet recognized for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 Beginning balance Increase Recognized as revenue Ending balance In millions of won Nuclear power plant construction in overseas ￦   3,152,725     386,208    (754,998 )   2,783,935 (*) For the year ended December 31, 2021, the increased balance of contracts from new orders is ￦458,635 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦72,427 million. 2022 Beginning balance Increase Recognized as revenue Ending balance In millions of won Nuclear power plant construction in overseas ￦   2,783,935    3,457,964    (646,953 )   5,594,946 (*) For the year ended December 31, 2022, the increased balance of contracts from new orders is ￦3,578,599 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦81,401 million. 2023 Beginning balance Increase (decrease) (*) Recognized as revenue Ending In millions of won Nuclear power plant construction in overseas and others ￦   5,594,946     986,049    (785,395 ) 5,795,600 (*) For the year ended December 31, 2023, the increased balance of contracts from new orders is ￦1,029,165 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦43,116 million. (2) Accumulated earned revenue, expense and others related to the Company’s construction contracts in progress as of December 31, 2022 and 2023 are as follows: 2022 Accumulated earned revenue Accumulated expense Accumulated profit Unearned advance receipts In millions of won Nuclear power plant construction in overseas ￦  22,507,004  21,666,552   840,452     29,877 2023 Accumulated earned revenue Accumulated expense Accumulated profit Unearned advance receipts In millions of won Nuclear power plant construction in overseas and others ￦ 22,996,785 22,382,628 614,157 74,253 (3) Gross amount due from customers recognized as contract assets and due to customers recognized as contract liabilities for contract work as of December 31, 2022 and 2023 are as follows: 2022 2023 Contract Contract Contract Contract In millions of won Nuclear power plant construction in overseas and others ￦ 118,983 120,952 183,204 270,789 (*1) Included in trade and other receivables, net, in the consolidated statements of financial position. The balance of trade receivables from construction contracts are ￦85,757 million and ￦101,180 million, as of December 31, 2022 and 2023, respectively. (*2) Included in non-financial liabilities as advance received in the consolidated statements of financial position. The revenue recognized on December 31, 2023 from the amounts included in contract liabilities at the end of the prior year is ￦117,311 million. Revenue recognized for the year ended December 31, 2023 from performance obligations satisfied in previous periods is ￦9,367 million.

Intangible Assets other than Go

Intangible Assets other than Goodwill	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about intangible assets [abstract]
Intangible Assets other than Goodwill	21. Intangible Assets other than Goodwill (1) Intangible assets as of December 31, 2022 and 2023 are as follows: 2022 Acquisition Government Accumulated Accumulated Book value In millions of won Software ￦ 1,002,040 (174 ) (799,013 ) (20 ) 202,833 Copyrights, patents rights and other industrial rights 104,559 —  (67,368 ) (9,178 ) 28,013 Mining rights 625,845 —  (46,187 ) (541,133 ) 38,525 Development expenditures 938,032 (3,477 ) (883,527 ) —  51,028 Intangible assets under development 76,625 (2,108 ) —  (8,903 ) 65,614 Usage rights of donated assets and others 592,797 —  (435,518 ) (136 ) 157,143 Leasehold rights 28,185 —  (23,297 ) —  4,888 Greenhouse gas emissions rights 43,960 —  —  —  43,960 Others 551,396 (67 ) (174,714 ) (11,955 ) 364,660 ￦   3,963,439       (5,826 )   (2,429,624 )     (571,325 )     956,664 2023 Acquisition Government Accumulated Accumulated Book value In millions of won Software ￦ 1,083,537 (413 ) (885,677 ) (19 ) 197,428 Copyrights, patents rights and other industrial rights 105,827 —  (73,158 ) (9,178 ) 23,491 Mining rights 643,625 —  (57,549 ) (553,911 ) 32,165 Development expenditures 966,530 (2,121 ) (911,096 ) —  53,313 Intangible assets under development 94,916 (2,458 ) —  (8,903 ) 83,555 Usage rights of donated assets and others 592,739 —  (447,352 ) (136 ) 145,251 Leasehold rights 28,185 —  (24,256 ) —  3,929 Greenhouse gas emissions rights 107,086 —  —  —  107,086 Others 599,958 (322 ) (199,865 ) (12,005 ) 387,766 ￦   4,222,403       (5,314 )   (2,598,953 )     (584,152 )   1,033,984 (2) Changes in intangible assets for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisition Disposal Amortization Reversal Others Ending In millions of won Software ￦ 162,596 22,532 (57 ) (84,649 ) —  102,585 203,007 (Government grants) (91 ) —  —  60 —  (143 ) (174 ) Copyrights, patents rights and other industrial rights 35,187 270 (37 ) (7,136 ) —  (271 ) 28,013 Mining rights 41,902 2,395 —  (4,296 ) —  (1,476 ) 38,525 Development expenditures 72,944 —  —  (24,238 ) —  5,799 54,505 (Government grants) (3,820 ) —  —  1,466 —  (1,123 ) (3,477 ) Intangible assets under development 81,430 39,559 —  —  (14 ) (53,253 ) 67,722 (Government grants) (7,326 ) —  —  —  —  5,218 (2,108 ) Usage rights of donated assets and others 169,783 —  —  (11,394 ) (150 ) (1,096 ) 157,143 Leasehold rights 5,848 —  —  (960 ) —  —  4,888 Greenhouse gas emissions rights 78,137 57,466 —  —  —  (91,643 ) 43,960 Others 407,558 4,073 (260 ) (25,017 ) —  (21,627 ) 364,727 (Government grants) (71 ) —  —  4 —  —  (67 ) ￦   1,044,077     126,295         (354 )     (156,160 )        (164 ) (57,030 )     956,664 2023 Beginning Acquisition Disposal Amortization Impairment Others Ending In millions of won Software ￦     203,007 12,837 (18 ) (86,174 ) —  68,189 197,841 (Government grants) (174 ) —  —  85 —  (324 ) (413 ) Copyrights, patents rights and other industrial rights 28,013 319 (70 ) (4,918 ) (180 ) 327 23,491 Mining rights 38,525 2,164 —  (10,289 ) —  1,765 32,165 Development expenditures 54,505 —  —  (25,614 ) —  26,543 55,434 (Government grants) (3,477 ) —  —       1,356       —  —  (2,121 ) Intangible assets under development 67,722 51,282 —  —  —  (32,991 ) 86,013 (Government grants) (2,108 ) —  —  —  —  (350 ) (2,458 ) Usage rights of donated assets and others 157,143 —  —  (11,857 ) —  (35 ) 145,251 Leasehold rights 4,888 —  —  (959 ) —  —  3,929 Greenhouse gas emissions rights 43,960 8,577 (1 ) (2 ) —  54,552 107,086 Others 364,727 4,136 (119 ) (24,895 ) (103 ) 44,342 388,088 (Government grants) (67 ) —        —  93 —  (348 ) (322 ) ￦ 956,664     79,315 (208 ) (163,174 ) (283 ) 161,670   1,033,984 (3) Significant specific intangible assets as of December 31, 2022 and 2023 are as follows: 2022 Type Description Currency Amount Remaining useful lives In millions of won and thousands of Australian dollars Software ORACLE license for SDIS integrated DB KRW 5,509 3 years and 4 months Copyrights, patents rights and other industrial rights Contributions to APR NRC DC KRW 20,871 5 years Mining rights Mining rights of Bylong mine AUD —  — (*) Usage rights of donated assets and others Sejong Haengbogdosi sharing charge KRW 17,772 3 years and 11 months Right of use electricity and gas supply facility (Community district of Songdo) KRW 7,908 7 years and 6 months Others Occupancy and use of public waters KRW 76,212 14 years and 1 month Greenhouse gas emissions rights KRW 43,960 —  Business rights KRW 154,712 26 years and 11 months (*)   The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full. 2023 Type Description Currency Amount Remaining useful lives In millions of won and thousands of Australian dollars Software S/4HANA ERP license KRW 5,742 3 years and 11 months Copyrights, patents rights and other industrial rights Contributions to APR NRC DC KRW 16,697 4 years Mining rights Mining rights of Bylong mine AUD —  —  (*) Usage rights of donated assets and others Sejong Haengbogdosi sharing charge KRW 13,235 2 years and 11 months Right of use electricity and gas supply facility (Community district of Songdo) KRW 6,853 6 years and 6 months Others Occupancy and use of public waters KRW 70,800 13 years and 1 month Greenhouse gas emissions rights KRW 107,086 —  Business rights KRW 148,964 25 years and 11 months (*)   The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full. (4) For the years ended December 31, 2021, 2022 and 2023, the Company recognized research and development expenses of 689,397 million, 727,810 million, and 717,561 million, respectively.

Trade and Other Payables

Trade and Other Payables	12 Months Ended
	Dec. 31, 2023
Trade and other payables [abstract]
Trade and Other Payables	22. Trade and Other Payables Trade and other payables as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Trade payables ￦ 7,529,857 —  4,341,482 —  Non-trade 2,132,838 2,023,985 2,140,906 1,716,345 Accrued expenses 1,605,118 6,351 1,859,765 23,148 Leasehold deposits received 2,479 35 2,548 1,042 Other deposits received 97,408 47,863 127,933 33,723 Lease liabilities 614,037 3,549,106 612,765 3,195,115 Dividends payable 1,812 —  4,574 —  Others(*) —  11,574 —  12,584 ￦   11,983,549  5,638,914 9,089,973 4,981,957 (*) Details of others as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Advance received from local governments ￦ —  3,477 —  3,069 Others —  8,097 —  9,515 ￦         —  11,574 —  12,584

Borrowings and Debt Securities

Borrowings and Debt Securities	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about borrowings [abstract]
Borrowings and Debt Securities	23. Borrowings and Debt Securities (1) Borrowings and debt securities as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Current liabilities Short-term borrowings ￦ 8,820,425 10,667,335 Current portion of long-term borrowings 3,638,202 5,780,638 Current portion of debt securities 10,205,395 24,681,439 Less: Current portion of discount on long-term borrowings (774 ) (1,152 ) Less: Current portion of discount on debt securities (4,246 ) (7,176 ) Add: C —  263  22,659,002 41,121,347 Non-current Long-term borrowings 2,977,268 3,407,514 Debt securities 95,160,920 89,293,561 Less: Discount on long-term borrowings (14,945 ) (14,683 ) Less: Discount on debt securities (177,543 ) (175,909 ) Add: Premium on debt securities 663 —  97,946,363 92,510,483 ￦ 120,605,365 133,631,830 (2) Repayment schedule of borrowings and debt securities as of December 31, 2022 and 2023 are as follows: 2022 Type Borrowings Debt Securities   In millions of won Less than 1 year ￦ 12,458,627 10,205,395 1~ 5 years 1,472,655 65,278,587 Over 5 years 1,504,613 29,882,333 ￦  15,435,895 105,366,315 2023 Type Borrowings Debt Securities   In millions of won Less than 1 year ￦ 16,447,973 24,681,439 1~ 5 years 1,649,696 64,342,617 Over 5 years 1,757,818 24,950,944 ￦  19,855,487 113,975,000 (3) Short-term borrowings as of December 31, 2022 and 2023 are as follows: 2022 Type Creditor Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of USD Local short-term borrowings DB Financial Investment and others 3.21~5.80 2023.01.02 —  ￦ 5,549,120 Local short-term borrowings Nonghyup Bank and others 3M CD+1.11~1.70 2023.05.25 —  3,000,000 Local short-term borrowings Shinhan Bank 6M Bank debenture 2023.11.17 —  50,000 Local short-term borrowings Korea Development Bank 4.15 2023.01.06 —  3,400 Foreign short-term borrowings Shinhan Bank 5.19 2023.02.28 USD 12,045 15,264 Foreign short-term borrowings Shinhan Bank SOFR(1M)+0.65 2023.02.27 USD 40,000 50,692 Foreign short-term borrowings Kookmin Bank and others 3.32~5.88 2023.01.09  USD 91,796 116,333 Local bank overdraft Woori Bank and others Standard overdraft 2023.01.06  —  35,616 ￦ 8,820,425 2023 Type Creditor Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of USD Local short-term borrowings DB Financial Investment and others 4.00~4.84 2024.01.05 —  ￦ 6,180,339 Local short-term borrowings Nonghyup Bank and others 3M CD +0.98 2024.05.26 —  4,300,000 Local short-term borrowings Korea Development Bank Standard 2024.02.24 —  30,000 Local short-term borrowings Export-Import Bank of Korea 3M Bank 2024.12.27 —  50,000 Foreign short-term borrowings Export-Import Bank of Korea 5.49 2024.09.27 USD 40,000 51,576 Foreign short-term borrowings Kookmin Bank SOFR(1M)+0.95 2024.02.16 USD 40,000 51,576 Local bank overdraft Woori Bank and others Standard 2024.01.05 —  3,844 ￦ 10,667,335 (4) Long-term borrowings as of December 31, 2022 and 2023 are as follows: 2022 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of foreign currencies Local long-term borrowings Korea Development Bank Others 0.50 2023~2044 —  ￦ 2,133 Facility 2.50 4.60 2023~2028 —  28,420 Facility CB rate+0.90 2029 —  9,985 Operating funds 1yr KDB rate +0.81~0.91 2023~2024 —  54,300 Hana Bank and others Commercial Paper 3M CD+0.13~1.20 2023~2027 —  3,250,000 Facility 4.60 2028 —  8,137 Facility 3yr KTB rate-1.50 2028 —  3,821 Export-Import Bank of Korea Project loans 1.50 2026 —  10,312 Facility 1.32 2028 —  58,100 Operating funds 1.78 2023 —  15,700 Korea Energy Agency Development of power resources 3yr KTB rate-2.25 1.50~1.75 2023~2028 —  11,175 Facility 3yr KTB rate-2.50 2023~2024 —  393 Project loans —  2023~2027 —  1,197 Shinhan Bank and others Facility CB rate+0.90~1.10 2028~2029 —  19,195 Commercial Paper 3M CD+0.38 2025 —  150,000 Others 3.95 2034 —  78,905 Others Standard overdraft rate+1.00 2034 —  78,905 Kookmin Bank Facility MOR+0.79 3M CD+1.79 5.04 2023~2035 —  105,155 Others 4.00 2025 —  20,700 Woori Bank  Facility 3M Libor 5.04 2035~2042 —  48,823 2022 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of foreign currencies Others Facility 3.50~6.80 2028~2044 —  ￦ 690,259 Facility CB rate+1.10 1.75~4.56 2024~2036 —  103,131 PF Refinancing CB rate+1.25 2030 —  7,634 PF Refinancing 4.10 2030 —  21,206 Securitized debts (*) 3M CD+1.80 2025 —  33,476 Others 4.40~7.90 2023~2039 —  120,217 Others 1.80~4.50 2031~2034 —  49,929 ￦ 4,981,208 Foreign long-term borrowings Korea Energy Agency Project loans —  2026 USD 8,744 11,081 Export-Import Bank of Korea and others Direct Loan and others 6M Libor+3.20 2036 USD 78,094 98,969 Direct Loan and others 3M Libor+2.25~3.70 2027 JOD 91,051 162,692 Facility 2029~2032 USD 132,168 167,496 Kookmin Bank and others EBL SOFR(1M)+0.11~0.75 2024 USD 149,592 189,578 Riyad Bank EBL SOFR(3M)+1.20 2025 USD 49,870 63,201 POSCO and others Shareholder’s loan 8.00 2025 USD 10,005 12,680 Shareholder’s loan 8.00 2031 JOD 4,853 8,671 Samsung Life Insurance and others Syndicated Loan 3.10~8.00 2032 JPY 4,752,934 45,304 Woori Bank and others Syndicated Loan JPY 6M Libor+1.84 2032 JPY 2,613,385 24,910 Solar Construction Lendings, LLC Facility 5.00 2025 USD 31,140 39,464 KiwoomSolar Power Professional Investor Private Placement Investment Trust V Senior borrowing 3.90 2029 EUR 40,531 54,765 IFC and others Facility 6M Libor+5.00 SOFR(3M)+1.83~1.99 5.41 2028~2031 USD 408,408 517,575 Hanwha US Solar Private Fund and others Facility 3.00 2038 USD 58,308 73,894 DBS Bank and others Facility 1M BBSY+1.40~2.25 2025 AUD 190,860 163,836 Others Others —  —  USD 116 146 1,634,262 6,615,470 Less: Discount on long-term borrowings (15,719 ) Less: Current portion of long-term borrowings (3,638,202 ) Add: Current portion of discount on long-term borrowings 774 ￦ 2,962,323 (*) The main reasons for early repayment of securitized debts as of December 31, 2022 are as follows: Type Details Non-payment Where the consignor fails to pay the principal to the trustee Guarantees for supplemental funding Where the consignor fails to fulfill guarantees for supplemental funding Additional trust obligation Where the consignor fails to fulfill the additional trust obligation Event of default In case the event of default occurs under the ABL loan agreement The C ompany 2023 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won Local long-term borrowings Korea Development Bank Others 0.50 2024~2044 —  ￦ 1,758 Facility 2.60~4.94 2025~2042 —  53,052 Facility CB rate+0.90 2029 —  9,985 Operating funds 1yr KDB rate+0.91 2024 —  40,000 Hana Bank and others Commercial Paper 3M CD+0.13~1.20 2024~2028 —  5,350,000 Facility 4.60 2028 —  6,558 Facility 3yr KTB rate-2.50 2028 —  3,156 Export-Import Bank of Korea Project loans 1.00 2026 —  7,365 Facility 1.32 2028 —  80,000 Operating funds 3M Bank debenture rate +0.66 2026 —  40,000 Korea Energy Agency Development of power resources 3yr KTB rate-2.25 2.25 2024~2028 —  9,176 Facility 3yr KTB rate-1.50 2024 —  163 Project loans —  2033 —  1,197 Shinhan Bank and others Facility CB rate+0.90~1.10 2028~2029 —  16,825 Operating funds 6M Bank debenture rate+0.93 2025 —  20,000 Commercial Paper 3M CD+0.38 2025 —  150,000 Others 3.95 2034 —  73,425 Others Standard overdraft rate+1.00 2034 —  73,425 Kookmin Bank Facility 1yr B 3M CD+1.79~2.10 5.04 2025~2037 —  186,032 Woori Bank Facility Standard overdraft rate+1.00 3M CD+1.90 5.04 2034~2042 —  101,172 IBK Facility 4.00~5.80 2042~2044 —  30,690 Nonghyup Bank Facility 3M CD+2.00~2.10 2030~2041 —  22,517 Others Facility 3.50~6.80 2028~2042 —  735,722 Facility CB rate+1.10 3M CD+2.10 1.75~3.30 2024~2041 —  51,509 PF Refinancing CB rate+1.25 2030 —  6,680 PF Refinancing 4.10 2030 —  18,556 Securitized debts (*) 3M CD+1.80 2025 —  52,060 Others 4.40~7.90 2025~2039 —  113,973 Others 1.80~4.50 2031~2034 —  49,879 ￦ 7,304,875 2023 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of foreign currencies Foreign long-term borrowings Korea Energy Agency Project loans — 2026 USD 8,744 ￦ 11,274 Export-Import Bank Direct Loan and others 6M Synthetic Libor+1.80~3.20 2036 USD 78,347 101,020 Direct Loan and others 6M Synthetic Libor+2.25~3.70 2027 JOD 62,385 113,390 Facility 6M Synthetic Libor+1.70~2.50 SOFR(1M)+ 1.83 2029 2031 USD 120,916 155,909 Korea Development Bank and others EBL SOFR(1M)+0.86 2025 USD 142,049 183,157 POSCO and others Shareholder’s loan 5.60~8.00 2025 USD 10,770 13,887 Shareholder’s loan 8.00 2031 JOD 5,419 9,850 Samsung Life Insurance and others Syndicated Loan 3.10~8.00 2032 JPY 4,350,671 39,707 Woori Bank and others Syndicated Loan JPY 6M Tibor+1.84 2032 JPY 2,399,088 21,896 Solar Construction Lending, LLC Facility 5.00 2025 USD 29,894 38,545 KiwoomSolar Power Professional Investor Private Placement Investment Trust V Senior borrowing 3.90 2029 EUR 40,478 57,745 IFC and others Facility SOFR(3M)+1.99 SOFR(6M)+5.00 3M BSBY+ 1.70 2024~2031 USD 655,922 845,746 Hanwha US Solar Private Fund and others Facility 6.00 2039 USD 60,674 78,233 DBS Bank and others Facility 1M BBSY+1.40~2.25 2025 AUD 185,086 162,891 Nonghyup Bank and others Facility 10.40 2039 USD 38,799 50,027 1,883,277 9,188,152 Less: D (15,835 ) Less: C (5,780,638 ) Add: C 1,152 ￦ 3,392,831 (*) The main reasons for early repayment of securitized debts as of December 31, 2023 are as follows: Type Details Non-payment Where the consignor fails to pay the principal to the trustee Guarantees for supplemental funding Where the consignor fails to fulfill guarantees for supplemental funding Additional trust obligation Where the consignor fails to fulfill the additional trust obligation Event of default In case the event of default occurs under the ABL loan agreement The Company is responsible for collateral obligations (fund supplementation) and liability guarantees for entrusted assets. (5) Local debt securities as of December 31, 2022 and 2023 are as follows: Issue date Maturity Interest rate (%) 2022 2023 In millions of won Electricity Bonds 2012.03.27~2023.09.11 2023.01.08~2052.04.21 1.43~5.99 ￦ 61,190,000 67,730,000 Corporate Bonds (*) 2009.10.16~2023.12.21 2024.01.12~2053.11.10 1.21~10.00 29,293,188 29,887,353 Corporate Bonds 2021.05.26~2023.12.28 2041.05.25~2043.09.15 2.00 ~3.78 11,578 41,578 90,494,766 97,658,931 Less: Discount on local debt securities (56,924 ) (54,826 ) Less: Current portion of local debt securities (8,401,619 ) (23,141,584 ) Add: Current portion of discount on local debt securities 2,344 4,712 ￦ 82,038,567 74,467,233 (*) Among the corporate bonds, each holder of Hee Mang Sunlight Power Co., Ltd.’s private equity bonds, amounting to ￦1,584 million, may exercise the early redemption rights on the 5th year (March 31, 2021) from the date of issuance of the bonds and every year on March 31 thereafter, until the year before the redemption date. (6) Foreign debt securities as of December 31, 2022 and 2023 are as follows: 2022 Type Issue date Maturity Interest rate (%) Foreign currency Local currency In millions of won and thousands of foreign currencies FY-96 1996.04.01~1996.12.06 2026.12.01~2096.04.01 6.00~7.95 USD 278,701 ￦ 353,198 FY-97 1997.01.31~1997.08.04 2027.02.01~2027.08.01 6.75~7.00 USD 314,717 398,841 FY-04 2004.04.23 2034.04.23 5.13 USD 286,920 363,614 FY-14 2014.07.30 2029.07.30 3.57 USD 100,000 126,730 FY-15 2015.06.15 2025.06.15 3.25 USD 300,000 380,190 FY-17 2017.07.25 2027.07.25 3.13 USD 300,000 380,190 FY-17 2017.10.30 2037.10.30 1.70 EUR 40,000 54,048 FY-17 2017.11.16 2037.11.16 2.36 SEK 450,000 54,527 FY-18 2018.03.13 2028.03.13 3.35 HKD 1,650,000 268,208 FY-18 2018.06.07~2018.07.25 2023.06.07~2023.07.25 3.75~3.88 USD 1,400,000 1,774,220 FY-19 2019.02.27 2024.02.27 0.13 CHF 200,000 274,574 FY-19 2019.06.24 2024.06.24 2.50 USD 500,000 633,650 FY-19 2019.07.19 2024.07.19~2027.07.19 0.00~0.05 CHF 300,000 411,861 FY-19 2019.10.30 2024.10.30 3M BBSW+0.97 AUD 300,000 257,523 FY-19 2019.12.19 2037.12.31 3.30~5.70 USD 360,899 457,368 FY-20 2020.02.03 2025.02.03 2.13 USD 300,000 380,190 FY-20 2020.05.06 2025.05.06 1.75 USD 500,000 633,650 FY-20 2020.06.15 2025.06.15 1.13 USD 500,000 633,650 FY-20 2020.08.03 2026.02.03 1.00 USD 300,000 380,190 FY-21 2021.01.27 2026.01.27 0.75 USD 450,000 570,285 FY-21 2021.04.27 2026.04.27 1.25 USD 500,000 633,650 FY-21 2021.08.09 2026.08.09 1.25 USD 300,000 380,190 FY-21 2021.09.24 2026.09.24 1.13 USD 300,000 380,190 FY-22 2022.04.21 2027.04.21 3.63 USD 300,000 380,190 FY-22 2022.05.06 2025.05.06 3.60 USD 500,000 633,650 FY-22 2022.06.14 2025.06.14~2027.06.14 3.63~4.00 USD 800,000 1,013,840 FY-22 2022.06.28 2025.06.28 4.13 USD 300,000 380,190 FY-22 2022.07.27 2027.07.27 4.25 USD 700,000 887,110 FY-22 2022.10.06 2026.04.06~2028.04.06 5.38~5.50 USD 800,000 1,013,840 FY-22 2022.10.06~2022.11.01 2032.10.06 5.16 HKD 2,350,000 381,992 14,871,549 Less: Discount on foreign debt securities (124,865 ) Add: Premium on foreign debt securities 663 Less: Current portion of foreign debt securities (1,803,776 ) Add: Current portion of discount on foreign debt securities 1,902 ￦ 12,945,473 2023 Type Issue date Maturity Interest rate (%) Foreign currency Local currency In millions of won and thousands of foreign currencies FY-96 1996.04.01~1996.12.06 2026.12.01~2096.04.01 6.00~7.95 USD 278,701 ￦ 359,357 FY-97 1997.01.31~1997.08.04 2027.02.01~2027.08.01 6.75~7.00 USD 314,717 405,796 FY-04 2004.04.23 2034.04.23 5.13 USD 286,920 369,955 FY-14 2014.07.30 2029.07.30 3.57 USD 100,000 128,940 FY-15 2015.06.15 2025.06.15 3.25 USD 300,000 386,820 FY-17 2017.07.25 2027.07.25 3.13 USD 300,000 386,820 FY-17 2017.10.30 2037.10.30 1.70 EUR 40,000 57,064 FY-17 2017.11.16 2037.11.16 2.36 SEK 450,000 58,050 FY-18 2018.03.13 2028.03.13 3.35 HKD 1,650,000 272,349 FY-19 2019.02.27 2024.02.27 0.13 CHF 200,000 305,364 FY-19 2019.06.24 2024.06.24 2.50 USD 500,000 644,700 FY-19 2019.07.19 2024.07.19~2027.07.19 0.00~0.05 CHF 300,000 458,046 FY-19 2019.10.30 2024.10.30 3M BBSW+0.97 AUD 300,000 264,024 FY-19 2019.12.19 2037.12.31 3.30~5.70 USD 342,753 441,946 FY-20 2020.02.03 2025.02.03 2.13 USD 300,000 386,820 FY-20 2020.05.06 2025.05.06 1.75 USD 500,000 644,700 FY-20 2020.06.15 2025.06.15 1.13 USD 500,000 644,700 FY-20 2020.08.03 2026.02.03 1.00 USD 300,000 386,820 FY-21 2021.01.27 2026.01.27 0.75 USD 450,000 580,230 FY-21 2021.04.27 2026.04.27 1.25 USD 500,000 644,700 FY-21 2021.08.09 2026.08.09 1.25 USD 300,000 386,820 FY-21 2021.09.24 2026.09.24 1.13 USD 300,000 386,820 FY-22 2022.04.21 2027.04.21 3.63 USD 300,000 386,820 FY-22 2022.05.06 2025.05.06 3.60 USD 500,000 644,700 FY-22 2022.06.14 2025.06.14~2027.06.14 3.63~4.00 USD 800,000 1,031,520 FY-22 2022.06.28 2025.06.28 4.13 USD 300,000 386,820 FY-22 2022.07.27 2027.07.27 4.25 USD 700,000 902,580 FY-22 2022.10.06 2026.04.06~2028.04.06 5.38~5.50 USD 800,000 1,031,520 FY-22 2022.10.06~2022.11.01 2032.10.06 5.16 HKD 2,350,000 387,891 FY-23 2023.06.07 2030.06.07 4.51 HKD 1,037,000 171,167 FY-23 2023.07.12 2028.07.12 4.88 USD 350,000 451,290 FY-23 2023.07.18 2028.07.18 5.00 USD 500,000 644,700 FY-23 2023.07.31 2026.07.31 5.38 USD 1,000,000 1,289,400 FY-23 2023.09.21 2026.09.21 5.38 USD 300,000 386,820 16,316,069 Less: D (128,259 ) Add: Premium on foreign debt securities 263 Less: C (1,539,855 ) Add: C 2,464 Less: C premium (263 ) ￦ 14,650,419 (7) Changes in borrowings and debt securities for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 80,529,513 120,605,365 Cash flow 39,193,816 12,692,924 Effect of exchange rate fluctuations 906,877 335,353 Others (24,841 ) (1,812 ) Ending balance ￦ 120,605,365 133,631,830

Lease

Lease	12 Months Ended
	Dec. 31, 2023
Presentation of leases for lessee [abstract]
Lease	24. Leases Company as a lessee (1) Lease contracts The Company applies the short-term leases recognition exemption to its lease contracts that have a lease term of 12 months or less from the commencement date, and recognized ￦235,473 million and ￦172,711 million respectively, as expense for the years ended December 31, 2022 and 2023. The Company also applies the leases of low-value (2) Right-of-use 2022 Acquisition cost Accumulated depreciation Book value In millions of won Land ￦ 886,076 (224,277 ) 661,799 Buildings 135,290 (60,434 ) 74,856 Structures 30,879 (6,914 ) 23,965 Machinery 1,737 (902 ) 835 Ships 4,151,460 (1,554,597 ) 2,596,863 Vehicles 35,712 (20,996 ) 14,716 Others (*) 751,570 (413,479 ) 338,091 ￦   5,992,724   (2,281,599 )   3,711,125 (*) Including a power purchase agreement (“PPA”) with CGN Yulchon Generation Co., Ltd. 2023 Acquisition cost Accumulated depreciation Book value In millions of won Land ￦ 937,481 (281,621 ) 655,860 Buildings 188,017 (97,444 ) 90,573 Structures 46,573 (9,217 ) 37,356 Machinery 26,453 (20,510 ) 5,943 Ships 4,137,168 (1,823,863 ) 2,313,305 Vehicles 59,208 (33,717 ) 25,491 Others (*) 646,894 (411,679 ) 235,215 ￦ 6,041,794 (2,678,051 ) 3,363,743 (*) Including a power purchase agreement (“PPA”) with CGN Yulchon Generation Co., Ltd. (3) Changes in right-of-use 2022 Beginning Increase Depreciation Decrease Others Ending In millions of won Land ￦ 652,795 63,654 (41,260 ) —  (13,390 ) 661,799 Buildings 62,884 42,399 (30,243 ) (1,042 ) 858 74,856 Structures 21,148 4,256 (1,758 ) —  319 23,965 Machinery 565 429 (159 ) —  —  835 Ships 3,029,219 —  (393,677 ) —  (38,679 ) 2,596,863 Vehicles 13,618 13,475 (8,673 ) (962 ) (2,742 ) 14,716 Others 279,168 72,803 (33,298 ) (834 ) 20,252 338,091 ￦ 4,059,397    197,016    (509,068 )     (2,838 )     (33,382 )  3,711,125 2023 Beginning Increase Depreciation Decrease Others Ending In millions of won Land ￦ 661,799 2,696 (57,461 ) (126 ) 48,952 655,860 Buildings 74,856 24,622 (32,591 ) (904 ) 24,590 90,573 Structures 23,965 49 (2,471 ) (273 ) 16,086 37,356 Machinery 835 —  (94 ) —  5,202 5,943 Ships 2,596,863 199,538 (382,298 ) —  (100,798 ) 2,313,305 Vehicles 14,716 21,097 (10,464 ) (1,008 ) 1,150 25,491 Others 338,091 13,860 (51,138 ) (302 ) (65,296 ) 235,215 ￦ 3,711,125    261,862    (536,517 )     (2,613 )     (70,114 )  3,363,743 (4) Lease liabilities as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Less than 1 year ￦ 639,756 641,525 1 ~ 5 years 2,047,584 1,898,846 More than 5 years 1,925,012 1,694,729 4,612,352 4,235,100 Less: Discount (449,209 ) (427,220 ) Present value of lease payment ￦ 4,163,143 3,807,880 (5) The details of the liquidity classification of lease liabilities as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Current lease liabilities ￦ 614,037 612,765 Non-current 3,549,106 3,195,115 ￦ 4,163,143 3,807,880 (6) Changes in lease liabilities for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Increase Decrease Interest Others(*) Ending In millions of won Lease liabilities ￦   4,410,503      109,019     (654,236 )       91,590     206,267  4,163,143 (*) Including translation effect of foreign currency lease liabilities and others. 2023 Beginning Increase Decrease Interest Others(*) Ending In millions of won Lease liabilities ￦   4,163,143 253,495 (661,665 ) 87,426 (34,519 ) 3,807,880 (*) Including translation effect of foreign currency lease liabilities and others. (7) Details of expense relating to lease contracts as lessee for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Depreciation of right-of-use ￦ 509,068 536,517 Interest expenses of lease liabilities 91,590 87,426 Leases expenses for short-term leases 235,473 172,711 Leases expenses for leases of low-value 3,147 4,659 Variable lease payments 112,158 62,006 ￦   951,436   863,319 (8) The total cash outflow related to the lease contracts, including cash outflows due to short-term leases and leases of low-value 1,005,014 million and 901,041 million, for the years ended December 31, 2022 and 2023, respectively. Company as a lessor (1) Finance lease contracts The Company entered into power purchase agreements (“PPA”) with Jordan Electric Power Company to provide a 373MW level Qatrana gas combined power plant over a 25-year 20-year (2) Profit and loss related to finance lease for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Finance income on the net investment in the lease ￦   122,355     118,695 (3) Maturity analysis of the lease payments receivable and reconciliation of the undiscounted lease payments to the net investment in the lease as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Less than 1 year ￦ 181,930 189,779 1 ~ 2 years 169,693 182,743 2 ~ 3 years 166,787 179,428 3 ~ 4 years 166,196 178,074 4 ~ 5 years 166,965 168,221 More than 5 years 1,527,093 1,408,350 2,378,664 2,306,595 Less: Unearned finance income (1,139,274 ) (1,057,434 ) Net investment in the lease (*) ￦  1,239,390 1,249,161 (*) Including the present value of unguaranteed residual value amounting to ￦22,910 million and ￦25,521 million, as of December 31, 2022 and 2023, respectively. The implicit interest rate for a lease term is determined on the lease contract date. The implicit interest rate of the finance lease contracts is from 0.00% up to 17.03% per year as of December 31, 2023. (prior year : 0.00% ~ 17.08%) (4) Changes in the allowance for doubtful accounts of finance lease receivables for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦      768 4,505 Bad debt expense 3,737 751 Ending balance ￦ 4,505 5,256

Employment Benefits

Employment Benefits	12 Months Ended
	Dec. 31, 2023
Disclosure of information about defined benefit plans [abstract]
Employment Benefits	25. Employment Benefits (1) Employment benefit obligations as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Net defined benefit asset ￦ 198,626 70,187 Net defined benefit obligations 825,927 1,033,409 Other long-term employee benefit obligations 2,794 1,911 (2) Principal assumptions used for actuarial valuation as of December 31, 2022 and 2023 are as follows: 2022 2023 Discount rate 5.16%~5.19% 4.06%~5.44% Future salary and benefit levels 4.55% 4.82% Weighted average duration 8.84 years 9.52 years (3) Details of expense relating to defined benefit plans for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Current service cost ￦ 524,942 496,722 373,802 Interest cost 91,877 116,256 190,257 Expected return on plan assets (52,782 ) (73,484 ) (163,074 ) Past service cost 5,483 125 —  ￦ 569,520 539,619 400,985 Expenses described above are recognized in those items below in the consolidated financial statements. 2021 2022 2023 In millions of won Cost of sales ￦ 416,287 404,243 285,209 Selling and administrative expenses 95,983 81,457 73,521 Others (Construction-in-progress 57,250 53,919 42,255 ￦ 569,520 539,619 400,985 In addition, for the years ended December 31, 2021, 2022 and 2023, employee benefit obligations expenses of, ￦71,976 million, ￦101,369 million and ￦85,560 million, respectively, are recognized as cost of sales, and ￦17,144 million, ￦28,301 million and ￦16,012 million, respectively, are recognized as selling and administrative expenses, and ￦13,025 million, ￦14,827 million and ￦15,639 million, respectively, are recognized as construction-in-progress (4) Details of defined benefit obligations as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Present value of defined benefit obligation from funded plans ￦ 3,776,715 4,312,702 Fair value of plan assets (3,149,414 ) (3,349,480 ) Net liabilities incurred from defined benefit plans ￦ 627,301  963,222 (5) Changes in the present value of defined benefit obligations for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 4,564,417 3,776,715 Current service cost 496,722 373,802 Interest cost 116,256 190,257 Remeasurement component (1,012,727 ) 409,635 Past service cost 125 —  Actual payments (388,105 ) (437,734 ) Others 27 27 Ending balance ￦  3,776,715  4,312,702 (6) Changes in the fair value of plan assets for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 2,909,547 3,149,414 Expected return 73,484 163,074 Remeasurement component (11,609 ) 4,777 Contributions by the employers 347,778 188,566 Actual payments (169,786 ) (156,351 ) Ending balance ￦  3,149,414  3,349,480 (7) Details of the fair value of plan assets as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Equity instruments ￦ 171,301 5,326 Debt instruments 854,640 697,907 Bank deposits 590,103 611,821 Others(*) 1,533,370   2,034,426 ￦    3,149,414  3,349,480 (*) ‘Others’ consist of various financial assets managed by external asset management companies. For the years ended December 31, 2022 and 2023, actual returns on plan assets amounted to ￦61,875 and ￦167,851 million, respectively. (8) Remeasurement components recognized in other comprehensive income (loss) for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Actuarial gain from changes in financial assumptions ￦ (967,366 ) 429,810 Experience adjustments, etc. (45,361 ) (20,175 ) Expected return 11,609 (4,777 ) ￦   (1,001,118 )  404,858 Remeasurement components recognized as other comprehensive income or loss are included in retained earnings. In addition, gain on accumulated remeasurement component amounting to ￦614,805 million and gain on accumulated remeasurement component amounting to ￦29,229 million have been recognized as other comprehensive income or loss as of December 31, 2022 and 2023, respectively.

Provisions

Provisions	12 Months Ended
	Dec. 31, 2023
Disclosure of other provisions [abstract]
Provisions	26. Provisions (1) Provisions as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Employment benefits Provisions for employment benefits ￦ 1,045,058 —  999,691 —  Litigation Litigation provisions 26,974 154,205 5,299 171,719 Decommissioning cost Nuclear plants —  23,035,427 81,684 21,565,203 Spent fuel 415,890 1,011,028 940,585 1,985,149 Radioactive waste 94,158 1,895,849 67,572 1,840,513 PCBs —  88,359 —  57,944 Other recovery provisions —  32,770 —  36,082 Others Power plant regional support program 144,504 —  130,034 —  Transmission regional support program 239,235 —  256,006 —  Provisions for financial guarantee 22,895 44,345 25,534 24,458 Provisions for RPS 24,339 —  36,074 —  Provisions for greenhouse gas emissions obligations 298,876 —  18,672 —  Others 115,122 102,659 92,974 199,976 ￦ 2,427,051 26,364,642 2,654,125 25,881,044 (2) Changes in provisions for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Increase Payment Reversal Others Ending balance In millions of won Employment benefits Provisions for employment benefits ￦ 1,048,939 997,281 (1,001,283 ) —  121 1,045,058 Litigation Litigation provisions 114,718 112,797 (39,633 ) (6,360 ) (343 ) 181,179 Decommissioning cost Nuclear plants 19,461,461 3,630,830 (56,813 ) —  (51 ) 23,035,427 Spent fuel 1,350,662 493,943 (417,687 ) —  —  1,426,918 Radioactive waste 1,832,535 221,629 (64,157 ) —  —  1,990,007 PCBs 103,665 1,949 (17,156 ) (99 ) —  88,359 Other recovery provisions 30,231 2,093 (165 ) (751 ) 1,362 32,770 Others Power plant regional support program 146,588 52,470 (54,554 ) —  —  144,504 Transmission regional support program 250,288 176,424 (187,477 ) —  —  239,235 Provisions for financial guarantee 80,841 4,738 (17,789 ) —  (550 ) 67,240 Provisions for RPS —  587,586 (556,993 ) (6,254 ) —  24,339 Provisions for greenhouse gas emissions obligations 655,544 387,299 (590,172 ) (33,596 ) (120,199 ) 298,876 Others 271,828 4,447 (39,566 )  (19,853 ) 925 217,781 ￦ 25,347,300 6,673,486 (3,043,445 ) (66,913 ) (118,735 ) 28,791,693 2023 Beginning Increase in Payment Reversal Others Ending balance In millions of won Employment benefits Provisions for employment benefits ￦ 1,045,058 834,102 (877,933 ) (1,536 ) —  999,691 Litigation Litigation provisions 181,179 151,189 (67,478 ) (87,872 ) —  177,018 Decommissioning cost Nuclear plants 23,035,427 572,379 (62,035 ) (1,898,935 ) 51 21,646,887 Spent fuel 1,426,918 1,877,827 (379,011 ) —  —  2,925,734 Radioactive waste 1,990,007 89,054 (86,823 ) (84,153 ) —  1,908,085 PCBs 88,359 1,699 (17,100 ) (15,014 ) —  57,944 Other recovery provisions 32,770 1,319 (432 ) —  2,425 36,082 Others Power plant regional support program 144,504 51,814 (66,284 ) —  —  130,034 Transmission regional support program 239,235 177,520 (160,749 ) —  —  256,006 Provisions for financial guarantee 67,240 10,215 (25,174 ) (2,251 ) (38 ) 49,992 Provisions for RPS 24,339 620,855 (609,120 ) —  —  36,074 Provisions for greenhouse gas emissions obligations 298,876 77,207 (298,859 ) (58,552 ) —  18,672 Others 217,781 181,756 (101,601 ) (3,816 ) (1,170 ) 292,950 ￦ 28,791,693 4,646,936 (2,752,599 ) (2,152,129 ) 1,268 28,535,169 (3) Greenhouse gas emissions rights and obligations: (i) Allowances received free of charge from the government for each planned period as of December 31, 2023 are as follows: 3rd planned period 2021 2022 2023 2024 2025 Total In ten thousands of tons(tCO2-eq) Allowances received free of charge —  14,696 14,776 10,603 10,603 50,678 (ii) Changes in greenhouse gas emissions rights for the years ended December 31, 2022 and 2023 are as follows: 2022 3rd planned period 2021 2022 2023 2024 2025 Total Quantity Amount Quantity Amount Quantity Amount Quantity Amount Quantity Amount Quantity Amount In ten thousands tons(tCO2-eq), Beginning (*) 16,433 524,658 14,942 62,735 11,166 8,529 3,671 —  3,696 6,873 49,908 602,795 Purchase (Sell) 1,191 267,433 1,343 272,824 32 6,315 35 7,185 —  —  2,601 553,757 Government submission (17,602 ) (580,807 ) (838 ) (173,145 ) —  245 —  —  —  —  (18,440 ) (753,707 ) Borrowing (carryforward) (22 ) (3,298 ) 286 45,847 48 12,225 22 5,699 —  —  334 60,473 Others —  (207,986 ) —  (16,256 ) —  (8,529 ) —  —  —  5,419 —  (227,352 ) Ending —  —  15,733 192,005 11,246 18,785 3,728 12,884 3,696 12,292 34,403 235,966 (*) Changes such as additional allowances or cancellation of allowances are reflected. 2023 3rd planned period 2022 2023 2024 2025 Total Quantity Amount Quantity Amount Quantity Amount Quantity Amount Quantity Amount In ten thousands tons(tCO2-eq), Beginning (*) 14,704 192,005 14,204 18,785 8,088 12,884 8,065 12,292 45,061 235,966 Purchase (Sell) 1,315 135,040 707 67,506 73 14,839 —  —  2,095 217,385 Government Submission (15,972 ) (302,918 ) (484 ) (39,837 ) —  —  —  —  (16,456 ) (342,755 ) Carry Forward (Borrowing) (45 ) (24,127 ) (231 ) (28,266 ) 568 79,430 —  —  292 27,037 Reclassification (2 ) —  —  6,940 —  (7, —  (5,419 ) (2 ) (5,664 ) Ending —  —  14,196 25,128 8,729 99,968 8,065 6,873 30,990 131,969 (*) Changes such as additional allowances or cancellation of allowances are reflected. (iii) The Company does not have greenhouse gas emissions rights pledged as collateral as of December 31, 2023. (iv) The Company does not hold any greenhouse gas emissions rights prepared for generating a profit from short-term fluctuations in price as of December 31, 2023. (v) Estimated greenhouse gas emission of the Company for the year ended December 31, 2023 is 14,941 ten thousand tons.

Government Grants

Government Grants	12 Months Ended
	Dec. 31, 2023
Government grants [Abstract]
Government Grants	27. Government Grants (1) Government grants as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Land ￦ (27,405 ) (27,404 ) Buildings (50,437 ) (46,227 ) Structures (165,608 ) (157,881 ) Machinery (127,126 ) (119,824 ) Vehicles (2,045 ) (2,837 ) Equipment (6,608 ) (5,932 ) Tools (99 ) (62 ) Construction-in-progress (135,926 ) (173,474 ) Investment properties (21 ) (22 ) Software (174 ) (413 ) Development expenditures (3,477 ) (2,121 ) Intangible assets under development (2,108 ) (2,458 ) Other intangible assets (67 ) (322 ) ￦ (521,101 ) (538,977 ) (2) Changes in government grants for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning balance Receipt Acquisition Offset the items of depreciation expense and others Disposal Others Ending balance In millions of won Cash ￦ —  (50,755 ) —  —  —  50,755 —  Land (23,474 ) —  —  —  1 (3,932 ) (27,405 ) Buildings (52,122 ) —  —  5,360 —  (3,675 ) (50,437 ) Structures (172,021 ) —  —  9,568 1,250 (4,405 ) (165,608 ) Machinery (140,082 ) —  —  17,283 405 (4,732 ) (127,126 ) Vehicles (1,675 ) —  —  663 —  (1,033 ) (2,045 ) Equipment (149 ) —  —  494 —  (6,953 ) (6,608 ) Tools (64 ) —  —  32 —  (67 ) (99 ) Construction-in-progress (111,822 ) —  23,155 —  17 (47,276 ) (135,926 ) Investment properties (30 ) —  —  1 —  8 (21 ) Software (91 ) —  —  60 —  (143 ) (174 ) Development expenditures (3,820 ) —  —  1,466 —  (1,123 ) (3,477 ) Intangible assets under development (7,326 ) —  —  —  —  5,218 (2,108 ) Other intangible assets (71 ) —  —  4 —  —  (67 ) ￦ (512,747 )  (50,755 )  23,155  34,931  1,673  (17,358 ) (521,101 ) 2023 Beginning Receipt Acquisition Offset the Disposal Others Ending In millions of won Cash ￦ —  (57,207 ) —  —  —  57,207 —  Land (27,405 ) —  —  —  1 —  (27,404 ) Buildings (50,437 ) —  —  5,070 —  (860 ) (46,227 ) Structures (165,608 ) —  —  9,562 1,611 (3,446 ) (157,881 ) Machinery (127,126 ) —  —  17,413 1,230 (11,341 ) (119,824 ) Vehicles (2,045 ) —  —  960 —  (1,752 ) (2,837 ) Equipment (6,608 ) —  —  2,011 —  (1,335 ) (5,932 ) Tools (99 ) —  —  38 —  (1 ) (62 ) Construction-in-progress (135,926 ) —  5,544 —  —  (43,092 ) (173,474 ) Investment properties (21 ) —  —  1 —  (2 ) (22 ) Software (174 ) —  —  85 —  (324 ) (413 ) Development expenditures (3,477 ) —  —  1,356 —  —  (2,121 ) Intangible assets under development (2,108 ) —  —  —  —  (350 ) (2,458 ) Other intangible assets (67 ) —  —  93 —  (348 ) (322 ) ￦ (521,101 ) (57,207 ) 5,544 36,589 2,842 (5,644 ) (538,977 ) (3) Changes in government grants for specific business projects for the years ended December 31, 2022 and 2023 are as follows: 2022 Department Business Description Period Budget Beginning Received Interest Used Return Others Ending In millions of won Ministry of Trade, Industry and Energy Temporary electricity bill support for small business owners Temporary electricity bill support for small business owners 2021.04.01 ~ 2022.06.30 211,235 17,735 71,685 —  (88,300 ) —  —  1,120 Ministry of Trade, Industry and Energy 2021 project to support the supply of open electric vehicle charging station 2021 project to support the supply of open electric vehicle charging station 2021.01.01 ~ 2022.05.31 40,100 —  11,796 —  (11,796 ) —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Newly Electricity Supply Construction Fees) 2022 Electricity supply business in rural areas (Newly Electricity Supply Construction Fees) 2022.01.01 ~ 2023.01.31 149 —  151 —  (151 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Reservation of Financial Loans) 2022 Electricity supply business in rural areas (Reservation of Financial Loans) 2022.01.01 ~ 2023.01.31 166 —  166 —  (166 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Support for operational deficits of electricity providers) 2022 Electricity supply business in rural areas (Support for operational deficits of electricity providers) 2023.01.31 ~ 2022.01.31 166,732 —  158,669 —  (158,669 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Technical support for local governments and residents) 2022 Electricity supply business in rural areas (Technical support for local governments and residents) 2022.01.01 ~ 2023.01.31 1,028 —  268 —  (268 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Support for Losses in Local Government Operations) 2022 Electricity supply business in rural areas (Support for Losses in Local Government Operations) 2022.01.01 ~ 2023.01.31 10,078 —  11,071 —  (11,071 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Establishment of eco-friendly microgrid in island areas 2022 Establishment of eco-friendly microgrid in island areas 2022.01.01 ~ 2023.01.31 7,742 —  14,113 —  (14,113 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Operating expenses for regional projects around the power plant 2022 Operating expenses for regional projects around the power plant 2022.01.01 ~ 2022.12.31 387 —  63 —  (63 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Renewable Energy Generation Difference Support 2022 Renewable Energy Generation Difference Support 2022.01.01 ~ 2022.12.31 98,656 —  81,739 —  (81,739 ) —  —  —  Ministry of Trade, Industry and Energy Safety inspection of general electrical equipment Safety inspection of general electrical equipment 2022.01.01 ~ 2022.12.31 2,122 —  2,117 —  (2,117 ) —  —  —  Ministry of Trade, Industry and Energy Establishment of Integrated Control System for Renewable Energy in the transmission and substation sector Establishment of Integrated Control System for Renewable Energy in the transmission and substation sector 2021.01.01 ~ 2022.08.31 940 —  463 —  (463 ) —  —  —  Ministry of Trade, Industry and Energy Establishment of Integrated Control System for Renewable Energy in the power distribution sector Establishment of Integrated Control System for Renewable Energy in the power distribution sector 2021.01.01 ~ 2022.08.31 5,060 —  5,027 —  (5,027 ) —  —  —  Ministry of Employment and Labor Support for replacement of teaching materials at workplace daycare centers Support for replacement of teaching materials at workplace daycare centers 2022.01.01 ~ 2022.01.07 48 —  29 —  (29 ) —  —  —  2023 Department Business Description Period Budget Beginning Received interest Used Return Others Ending In millions of won Ministry of Trade, Industry and Energy Temporary electricity bill support for small business owners Temporary electricity bill support for small business owners 2021.04.01 ~ 2022.06.30 211,235 1,120 —  —  (51 ) —  —  1,069 Ministry of Trade, Industry and Energy Construction of the Integrated Control System for Renewable Energy in Transmission Area Construction of the Integrated Control System for Renewable Energy in Transmission Area 2022.01.01 ~ 2023.09.30 940 —  798 —  (798 ) —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Newly Electricity Supply Contribution Fees) Electricity supply business in rural areas (Newly Electricity Supply Contribution Fees) 2023.01.01 ~ 2024.01.31 2 —  35 —  (35 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Reservation of Financial Loans) Electricity supply business in rural areas (Reservation of Financial Loans) 2023.01.01 ~ 2024.01.31 166 —  166 —  (166 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Support for operational deficits of electricity providers) Electricity supply business in rural areas (Support for operational deficits of electricity providers) 2023.01.01 ~ 2024.01.31 158,275 —  149,259 —  (149,259 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Technical support for local governments and residents) Electricity supply business in rural areas (Technical support for local governments and residents) 2023.01.01 ~ 2024.01.31 1,176 —  1,862 —  (1,862 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Support for Losses in Local Government Operations) Electricity supply business in rural areas (Support for Losses in Local Government Operations) 2023.01.01 ~ 2024.01.31 12,036 —  8,619 —  (8,619 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Establishment of eco-friendly microgrid in island areas Establishment of eco-friendly microgrid in island areas 2023.01.01 ~ 2024.01.31 3,871 —  26,091 —  (26,091 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Operating expenses for regional projects around the power plant Operating expenses for regional projects around the power plant 2023.01.01 ~ 2023.12.31 361 —  51 —  (51 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Renewable Energy Generation Difference Support Renewable Energy Generation Difference Support 2023.01.01 ~ 2023.12.31 78,311 —  69,599 —  (69,599 ) —  —  —  Energy Cashback Energy Cashback Ministry of Trade, Industry and Energy Safety inspection of general electrical equipment Safety inspection of general electrical equipment 2023.01.01 ~ 2023.12.31 2,560 —  2,560 —  (2,560 ) —  —  —  Ministry of Trade, Industry and Energy Establishment of Integrated Control System for Renewable Energy in the power distribution sector Establishment of Integrated Control System for Renewable Energy in the power distribution sector 2023.01.01 ~ 2023.04.18 495 —  635 —  (635 ) —  —  —  Ministry of Trade, Industry and Energy Support for the installation of workplace daycare centers Support for the installation of workplace daycare centers 2023.01.01 ~ 2023.12.31 2,510 —  680 2 (680 ) (1,832 ) 1,832 2 Ministry of Employment and Labor Support for replacement of teaching materials at workplace daycare centers Support for replacement of teaching materials at workplace daycare centers 2023.01.01 ~ 2023.12.31 1,490 —  270 —  (270 ) —  —  —

Deferred Revenues

Deferred Revenues	12 Months Ended
	Dec. 31, 2023
Deferred income including contract liabilities [abstract]
Deferred Revenues	28. Deferred Revenues Deferred revenue for the years ended December 31, 2022 and 2023 are as follows which included in current and non-current non-financial 2022 2023 In millions of won Beginning balance ￦ 10,356,555 10,974,845 Increase 1,330,129 1,317,061 Recognized as revenue (711,839 ) (743,051 ) Ending balance ￦ 10,974,845 11,548,855

Non-financial Liabilities

Non-financial Liabilities	12 Months Ended
	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Non-financial Liabilities	29. Non-financial Non-financial 2022 2023 Current Non-current Current Non-current In millions of won Advance received ￦ 4,544,206 284,618 5,204,113 288,686 Unearned revenue 86,584 7,200 36,716 12,108 Deferred revenue 702,430 10,272,415 734,825 10,814,030 Withholdings 207,217 2,408 259,755 2,369 Others 1,433,940 96,020 1,646,254 78,807 ￦ 6,974,377 10,662,661 7,881,663 11,196,000

Contributed Capital

Contributed Capital	12 Months Ended
	Dec. 31, 2023
Disclosure of classes of share capital [abstract]
Contributed Capital	30. Contributed Capital (1) Details of shares issued as of December 31, 2022 and 2023 are as follows: 2022 Shares authorized Shares issued Par value per share (in won) Owned by government(*) Owned by others Total In millions of won except share information Common shares 1,200,000,000 641,964,077 ￦ 5,000 1,640,385 1,569,435 3,209,820 (*) Korea Development Bank’s interest of ￦1,056,176 million is included. 2023 Shares authorized Shares issued Par value per share (in won) Owned by government(*) Owned by others Total In millions of won except share information Common shares 1,200,000,000 641,964,077 ￦ 5,000 1,640,385 1,569,435 3,209,820 (*) Korea Development Bank’s interest of ￦1,056,176 million is included. (2) Details in number of outstanding capital stock for the years ended December 31, 2022 and 2023 are as follows. 2022 2023 Number of shares Beginning balance 641,964,077 641,964,077 Ending balance   641,964,077   641,964,077 (3) Details of share premium as of December 31, 2022 and 2023 are as follows:  2022 2023 In millions of won Share premium ￦    843,758       843,758

Retained Earnings and Dividends

Retained Earnings and Dividends Paid	12 Months Ended
	Dec. 31, 2023
Retained earnings [abstract]
Retained Earnings and Dividends Paid	31. Retained Earnings and Dividends Paid (1) Details of retained earnings as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Legal reserve (*) ￦ 1,604,910 1,604,910 Voluntary reserves  27,782,969 2,812,313 Retained earnings (Undisposed deficit) before appropriations (7,956,579 ) 11,921,039 Retained earnings ￦ 21,431,300 16,338,262 (*) The KEPCO Act requires KEPCO to appropriate a legal reserve equal to at least 20 paid-in (2) Details of voluntary reserves as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Reserve for investment on social overhead capital ￦ 5,277,449 2,272,313 Reserve for research and human development (*) 330,000 330,000 Reserve for business expansion  21,965,520   —  Reserve for equalizing dividends 210,000 210,000 ￦ 27,782,969 2,812,313 (*) The reserve for research and human development is appropriated by KEPCO to use as qualified tax credits to reduce corporate tax liabilities. The reserve is available for cash dividends for a certain period as defined by the Restriction of Special Taxation Act of Korea. (3) Changes in retained earnings for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 45,258,244 21,431,300 Loss for the year attributed to owners of the controlling company (24,466,853 ) (4,822,549 ) Changes in equity method retained earnings 12,305 (27,349 ) Remeasurements of defined benefit liability, net of tax 626,769 (242,987 ) Others —  (153 ) Additional paid-in 835 —  Ending balance ￦  21,431,300 16,338,262 (4) Dividends paid for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 In millions of won Number of shares issued Number of treasury stocks Number of shares eligible for dividends Dividends paid per share Dividends paid (In won) Common shares 641,964,077 —  641,964,077 ￦ 1,216 780,628 2022 In millions of won Number of shares issued Number of treasury stocks Number of shares eligible for dividends Dividends paid per share Dividends paid (In won) Common shares 641,964,077 —  641,964,077 ￦   —    —  2023 In millions of won Number of shares issued Number of treasury stocks Number of shares eligible for dividends Dividends paid per share Dividends paid (In won) Common shares 641,964,077 —  641,964,077 ￦   —    —  (5) Changes in retained earnings of investments in associates and joint ventures for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦        3,970     16,275 Changes 12,305 (27,349 ) Ending balance ￦ 16,275   (11,074 ) (6) Changes in remeasurement components related to defined benefit liability for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 98,844 614,805 Changes    964,791 (376,121 ) Income tax effect (338,022 ) 133,134 Transfer to reserve for business expansion (110,808 ) (342,589 ) Ending balance ￦ 614,805 29,229

Statements of Appropriation of

Statements of Appropriation of Retained Earnings (Disposition of Deficit)	12 Months Ended
	Dec. 31, 2023
Statement of Appropriation of Retained Earnings [Abstract]
Statements of Appropriation of Retained Earnings (Disposition of Deficit)	32. Statements of Appropriation of Retained Earnings (Disposition of Deficit) For the year ended December 31, 2022, KEPCO’s Deficit was disposed on March 28, 2023. For the year ended December 31, 2023, KEPCO’s deficits are expected to be disposed on March 26, 2024. Statements of disposition of deficit of KEPCO, the controlling company, for the years ended December 31, 2022 and 2023, respectively, are as follows: 2022 2023 In millions of won except for I.   Deficit before disposition Undisposed deficit carried over from prior years ￦ —  —  Net loss (25,297,713 ) (3,249,233 ) Remeasurement of the defined benefit plan     327,056 (149,474 ) (24,970,657 ) (3,398,707 ) II. Transfer from voluntary reserves 24,970,657 2,812,314 III.  Subtotal (I+II) —  (586,393 ) IV.  Disposition of deficit — 586,393 V. Undisposed deficit to be carried over forward to subsequent year —  —

Hybrid Bonds

Hybrid Bonds	12 Months Ended
	Dec. 31, 2023
Hybrid Bonds [Abstract]
Hybrid Bonds	33. Hybrid Bonds Hybrid bonds classified as equity (non-controlling Issuer Hybrid bond Issued date Maturity Yield (%) 2022 2023 In millions of won Korea South-East Power Co., Ltd. (*) 2nd hybrid bond 2012.12.07 2042.12.06 4.44 ￦ 230,000 230,000 Expense of issuance (627 ) (627 ) ￦ 229,373 229,373 (*) Bondholders may not require prepayment in any case, and the Company has a call option to repay all of these bonds on or after 12 years from the date of issuance of the bonds, or on each interest payment date henceforth. In addition, there is a step-up

Other Components of Equity

Other Components of Equity	12 Months Ended
	Dec. 31, 2023
Disclosure of reserves within equity [abstract]
Other Components of Equity	34. Other Components of Equity (1) Other components of equity of the parent as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Other capital surplus ￦ 1,268,569 1,600,801 Accumulated other comprehensive income 496,976 557,430 Other equity 13,294,973 13,294,972 ￦ 15,060,518 15,453,203 (2) Changes in other capital surplus for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 Gains on treasury stocks Others Subtotal Gains on disposal of treasury stocks Others Subtotal In millions of won Beginning balance ￦ 387,524 843,585 1,231,109 387,524 881,045 1,268,569 Changes in consolidation scope —  (597 ) (597 ) —  (48 ) (48 ) Additional paid-in —  39,641 39,641 —  —  —  Transactions between consolidated entities —  (1,584 ) (1,584 ) —  332,280 332,280 Ending balance ￦ 387,524 881,045 1,268,569 387,524 1,213,277 1,600,801 (3) Changes in accumulated other comprehensive income (loss) for the years ended December 31, 2022 and 2023 are as follows: 2022 Financial assets at fair value through other comprehensive income valuation reserve Shares in other comprehensive income of investments in associates and Reserve for overseas operations translation credit Reserve for gain (loss) on valuation of derivatives Total In millions of won Beginning balance ￦ (46,498 ) 311,252 (325,170 ) 2,784 (57,632 ) Changes in the unrealized fair value of financial assets at FVOCI, net of tax 58,008 —  —  —  58,008 Shares of —  509,487 —  —  509,487 Foreign currency translation of foreign operations, net of tax —  —  19,550 —  19,550 Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax —  —  —  (32,437 ) (32,437 ) Ending balance ￦ 11,510 820,739 (305,620 ) (29,653 ) 496,976 2023 Financial assets at fair value through other comprehensive income valuation reserve Shares in other comprehensive income of investments in associates and Reserve for overseas operations translation credit Reserve for gain (loss) on derivatives Total In millions of won Beginning balance ￦ 11,510 820,739 (305,620 ) (29,653 ) 496,976 Changes in the unrealized fair value of financial assets at FVOCI, net of tax (31,665 ) —  —  —  (31,665 ) Shares in other comprehensive income of associates and joint ventures, net of tax —  122,994 —  —  122,994 Foreign currency translation of foreign operations, net of tax —  —  (25,950 ) —  (25,950 ) Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax —  —  —  (5,078 ) (5,078 ) Others 153 —  —  —  153 Ending balance ￦ (20,002 ) 943,733 (331,570 ) (34,731 ) 557,430 (4) Other equity as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Statutory revaluation reserve ￦ 13,295,098 13,295,098 Changes in other equity (125 ) (126 ) ￦ 13,294,973 13,294,972

Sales

Sales	12 Months Ended
	Dec. 31, 2023
Revenue [abstract]
Sales	35. Sales Details of sales for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 Domestic Overseas Domestic Overseas Domestic Overseas In millions of won [Type of goods and services] Sales of goods ￦ 58,359,774 441,203 68,578,390 606,079 85,588,151 351,986 Electricity 57,308,555 —  66,198,964 —  82,954,778 —  Heat supply 232,738 —  489,629 —  440,435 —  Others 818,481 441,203 1,889,797 606,079 2,192,938 351,986 Sales related to rendering of services 252,216 204,184 370,799 343,803 467,661 283,217 Sales related to construction services 159,262 595,736 193,541 453,412 186,996 598,399 ￦ 58,771,252 1,241,123 69,142,730 1,403,294 86,242,808 1,233,602 [Timing of revenue recognition] Performance obligations satisfied at a point in time ￦ 58,359,774 441,203 68,578,390 606,079 85,588,151 351,986 Performance obligations satisfied over time 411,478 799,920 564,340 797,215 654,657 881,616 ￦ 58,771,252 1,241,123 69,142,730 1,403,294 86,242,808 1,233,602

Selling and Administrative Expe

Selling and Administrative Expenses	12 Months Ended
	Dec. 31, 2023
Selling, general and administrative expense [abstract]
Selling and Administrative Expenses	36. Selling and Administrative Expenses (1) Selling and administrative expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Salaries ￦ 1,121,188 1,142,360 1,098,460 Retirement benefit expense 113,127 109,758 89,533 Welfare and benefit expense 155,558 155,781 152,836 Insurance expense 17,909 20,835 27,726 Depreciation 219,427 244,676 241,533 Amortization of intangible assets 91,428 85,661 88,648 Bad debt expense 17,968 23,634 62,808 Commission 410,287 420,390 460,644 Advertising expense 29,230 33,739 30,305 Training expense 4,923 7,327 7,900 Vehicle maintenance expense 8,849 10,749 9,044 Publishing expense 3,568 3,732 3,281 Business promotion expense 3,522 3,198 2,559 Rent expense 43,650 47,680 44,807 Telecommunication expense 8,569 7,945 7,813 Transportation expense 870 1,012 1,099 Taxes and dues 93,446 122,177 112,449 Expendable supplies expense 9,052 9,617 7,252 Water, light and heating expense 12,351 17,950 16,207 Repairs and maintenance expense 123,134 152,449 154,062 Ordinary development expense 213,936 213,932 217,319 Travel expense 11,099 16,062 16,265 Clothing expense 10,540 13,044 10,450 Survey and analysis expense 889 1,126 1,068 Membership fee 1,331 1,469 1,503 Others 149,945 143,119 196,011 ￦ 2,875,796 3,009,422 3,061,582 (2) Details of “others” included in selling and administrative expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Accommodation development expenses ￦ 57,815 56,038 49,988 Miscellaneous wages 47,221 31,910 97,474 Litigation and filing expenses 16,383 14,876 19,204 Compensation for damages 3,303 3,116 4,300 Outsourcing expenses 3,799 3,635 3,511 Reward expenses 3,006 2,740 2,770 Overseas market development expenses 1,192 1,376 1,503 Others 17,226 29,428 17,261 ￦   149,945   143,119 196,011

Other Income and Expenses

Other Income and Expenses	12 Months Ended
	Dec. 31, 2023
Disclosure of other operating income (expense) [Abstract]
Other Income and Expenses	37. Other Income and Expenses (1) Other income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Reversal of other provisions ￦ 15,548 15,265 79,001 Reversal of other allowance for doubtful accounts 98 37 1,941 Gains on government grants 458 301 239 Gains on assets contributed 9,347 1,953 24,183 Gains on liabilities exempted 1,830 1,181 854 Compensation and reparations revenue 104,826 89,638 93,785 Revenue from foundation fund 1 3 60 Income related to transfer of assets from customers 661,212 711,839 743,051 Rental income 204,123 208,064 210,972 Others 36,690 67,208 121,816 ￦ 1,034,133 1,095,489 1,275,902 (2) Details of “others” included in other income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Refund of claim for rectification ￦ 7,274 701 1,054 Adjustment of research project 7,638 —  —  Maintenance expenses on lease building 160 125 124 Training expenses 1,739 1,684 1,946 Deposit redemption 378 12 100 Reversal of expenses on litigation 991 1,920 44,197 Revenue on royalty fee 173 455 422 Reimbursement of insurance fee 1 —  —  Gains on guarantee contracts 27 22 16 Others 18,309 62,289 73,957 ￦   36,690   67,208 121,816 (3) Other expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Compensation and indemnification expense ￦ 663 36 34 Accretion expenses of other provisions 2,711 1,138 4,962 Depreciation expenses on investment properties 1,386 486 493 Depreciation expenses on idle assets 3,621 3,635 3,683 Other bad debt expense 49,372 6,400 40,683 Donations 152,456 131,037 169,748 Others 47,723 69,418 39,302 ￦     257,932     212,150     258,905 (4) Details of “others” included in other expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Operating expenses related to the idle assets ￦ 44 1,683 1,494 Research grants 109 562 174 Expenses related to farming and fishing village supports 17,065 11,272 13,249 Expenses related to Operating of a fitness center 6,948 8,370 8,921 Expenses on adjustment of research and development grants 2,241 260 388 Taxes and dues 119 31,985 1,935 Expenses on R&D supports 861 48 9 Others 20,336 15,238 13,132 ￦      47,723      69,418      39,302

Other Gains (Losses)

Other Gains (Losses)	12 Months Ended
	Dec. 31, 2023
Other Gains (Losses) [Abstract]
Other Gains (Losses)	38. Other Gains (Losses) (1) Composition of other gains (losses) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Other gains Gains on disposal of property, plant and equipment ￦ 56,284 148,667 32,196 Gains on disposal of intangible assets 1 41 136 Reversal of impairment loss on property, plant and equipment —  134,735 —  Reversal of impairment loss on intangible assets 14 —  16,035 Gains on foreign currency translation 20,598 36,097 27,123 Gains on foreign currency transaction 48,671 235,221 139,077 Gains on insurance proceeds 144 43,497 6,785 Others 250,174 294,091 346,795 Other losses Losses on disposal of property, plant and equipment (92,622 ) (100,066 ) (98,120 ) Losses on disposal of intangible assets (145 ) (116 ) (71 ) Impairment loss on property, plant and equipment (4,056 ) (37,311 ) (17,031 ) Impairment loss on intangible assets —  (164 ) (2,865 ) Impairment loss on other non-current (16,035 ) —  —  Losses on foreign currency translation (4,732 ) (14,738 ) (3,901 ) Losses on foreign currency transaction (67,990 ) (299,117 ) (165,187 ) Others (181,787 ) (197,715 ) (258,286 ) ￦      8,519       243,122      22,686 (2) Details of “others” included in other gains for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Gains on disposal of inventories ￦ 4,446 11,091 20,447 Gains on proxy collection of TV license fee     42,271         42,286     41,372 Gains on compensation of impaired electric poles 812 768 1,138 Gains on harbor facilities dues 3,281 4,198 3,666 Gains on technical fees 3,968 2,972 3,071 Reversal of occupation development training fees 229 525   1,452 Gains on disposal of waste 4,272 7,749 3,815 Gains on insurance 690 —  —  Gains on tax rebate 685   548 374 Gains on other commission 1,822 2,097 2,044 Gains on disposal of greenhouse gas emissions rights 8,739 —  —  Gains on disposal of assets held-for-sale 160 236 —  Others 178,799 221,621 269,416 ￦ 250,174 294,091 346,795 (3) Details of “others” included in other losses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Losses on valuation of inventories ￦ 7,761 14,528 9,936 Losses on disposal of inventories 8,874 8,324   5,471 Losses due to disaster 6,238 5,068 7,138 Losses on rounding adjustment of electric charge surtax 1,283   1,317 1,332 Loss on disposal of greenhouse gas emissions rights 11,282 —  —  Others 146,349 168,478 234,409 ￦    181,787        197,715 258,286

Finance Income

Finance Income	12 Months Ended
	Dec. 31, 2023
Finance income [Abstract]
Finance Income	39. Finance Income (1) Finance income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Interest income ￦ 221,874 340,753 429,620 Dividends income 10,522 28,875 25,941 Gains on disposal of financial assets 7,718 11,199 13,162 Gains on valuation of financial assets at fair value through profit or loss 14,338 7,099 152,322 Gains on valuation of derivatives 860,011 595,256 382,611 Gains on transaction of derivatives 124,900   429,847 268,618 Gains on foreign currency translation 146,349 389,361   104,901 Gains on foreign currency transaction 15,618 29,997 42,886 Other financial income 1,284 925 4,970 ￦  1,402,614    1,833,312  1,425,031 (2) Details of interest income included in finance income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Cash and cash equivalents ￦ 12,692 51,872 100,205 Financial assets at fair value through profit or loss 18,415 58,540 65,470 Financial assets at amortized cost 797 1,308   2,929 Loans 25,196   33,545 44,029 Short-term financial instruments 7,531 15,827 34,260 Long-term financial instruments 12,470 14,371 14,183 Other financial assets 230 637 241 Trade and other receivables 144,543 164,653 168,303 ￦     221,874       340,753  429,620

Finance Expenses

Finance Expenses	12 Months Ended
	Dec. 31, 2023
Finance Expenses [Abstract]
Finance Expenses	40. Finance Expenses (1) Finance expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Interest expense ￦ 1,914,457 2,818,546 4,451,659 Losses on sale of financial assets 1,045 1,841 1 Losses on valuation of financial assets at fair value through profit or loss 5,480 44,329 24,015 Losses on valuation of derivatives 37,017 371,038 148,412 Losses on transaction of derivatives 40,818 205,162 178,959 Losses on foreign currency translation 1,159,334 934,005 491,782 Losses on foreign currency transaction 83,558 346,711 49,677 Losses on repayment of financial liabilities 10 15 —  Others 4,058 25,144 2,513 ￦ 3,245,777 4,746,791 5,347,018 (2) Details of interest expense included in finance expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Trade and other payables ￦ 213,765 204,078 200,440 Short-term borrowings 42,371 145,201 376,066 Long-term borrowings 115,141 204,037 407,915 Debt securities 1,728,588 2,388,517 3,634,680 Other financial liabilities 384,423 472,248 614,332 2,484,288 3,414,081 5,233,433 Less: Capitalized borrowing costs (569,831 ) (595,535 ) (781,774 ) ￦ 1,914,457 2,818,546 4,451,659 Capitalization rates for the years ended December 31, 2021, 2022 and 2023 are 2.02%~4.33%, 2.25%~3.86% and 2.34%~4.28%, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2023
Income Taxes [Abstract]
Income Taxes	41. Income Taxes (1) Income tax expense (benefit) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Current income tax expense Payment of income tax ￦ 357,767 563,681 621,957 Adjustment in respect of prior years due to change in estimate 153,113 48,374 (32,100 ) Current income tax directly recognized in equity (198,714 ) (350,348 ) 93,705 312,166 261,707 683,562 Deferred tax benefit Generation and realization of temporary differences (489,411 ) (564,801 ) (1,845,236 ) Reclassified from equity to profit (loss) —  (4,964 ) —  Changes of unrecognized tax losses, tax credit and temporary differences for prior periods (43,653 ) (38,708 ) (15,244 ) Changes in deferred tax on tax losses carryforwards (1,641,823 ) (9,175,755 ) (1,650,017 ) Tax credit carryforwards (12,199 ) 34,019 (16,734 ) Amount due to change in tax rate or regulations 18,931 73,991 5,836 (2,168,155 ) (9,676,218 ) (3,521,395 ) Income tax benefit ￦ (1,855,989 ) (9,414,511 ) (2,837,833) (2) Reconciliation between actual income tax benefit and amount computed by applying the statutory tax rate to loss before income taxes for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won L ￦ (7,071,570 ) (33,843,619 ) (7,553,977 ) Income tax benefit computed at applicable tax rate (*1) (1,944,682 ) (9,306,995 ) (1,936,840 ) Adjustments Effect of applying gradual tax rate (10,362 ) (10,362 ) (10,362 ) Effect of non-taxable (4,983 ) (9,471 ) (26,993 ) Effect of non-deductible 78,814 39,663 39,411 Effect of tax losses that are not recognized as deferred tax asset 1,351 19,275 —  Effects of tax credits and deduction (43,931 ) (98,684 ) (53,724 ) Reversal of unrecognized deferred tax asset, net (43,641 ) (38,708 ) (15,244 ) Effect of change in deferred tax due to change in tax rate 18,931 393,416 211,736 Deduction of deferred tax assets 73,887 (85,514 ) 29,095 Deferred tax related to investments in subsidiaries, associates and joint ventures (135,878 ) (375,064 ) (1,063,007 ) Others, net 1,392 9,559 20,195 (64,420 ) (155,890 ) (868,893 ) Adjustment in respect of prior years due to change in estimate 153,113 48,374 (32,100 ) Income tax benefit ￦ (1,855,989 ) (9,414,511 ) (2,837,833 ) Effective tax rate (*2 ) (*2 ) (*2 ) (*1) Applicable tax rates are 27.5%, of December 31, 2021, 2022 and 2023, respectively. (*2) The effective tax rate for the year ended December 31, 2021, 2022 and 2023 is not calculated due to income tax benefit. (3) Income tax directly adjusted to equity (except for accumulated other comprehensive income (loss)) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Dividends of hybrid bond ￦ 4,736 4,149 —  Disposal of subsidiaries —  406 —  ￦   4,736   4,555   —  (4) Income tax recognized as other comprehensive income (loss) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Income tax recognized as other comprehensive income (loss) L ￦ (9,753 ) (31,416 ) (10,624 ) Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax 24,220 40,390 4,863 Remeasurement of defined benefit liability (126,890 ) (322,489 ) 133,134 Investments in associates (53,672 ) (66,677 ) (40,213 ) Others (37,355 ) 25,289 6,545 ￦ (203,450 ) (354,903 ) 93,705 (5) Changes in deferred tax assets (liabilities) recognized in the consolidated statements of financial position for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning balance Amounts Amount Amounts recognized directly in equity Ending balance In millions of won Deferred tax on temporary differences Employee benefits ￦ 558,383 (36,341 ) (322,489 ) —  199,553 Cash flow hedge (49,947 ) (46,188 ) 40,390 405 (55,340 ) Investments in subsidiaries, associates and joint ventures (8,721,320 ) 410,310 (66,677 ) —  (8,377,687 ) Property, plant and equipment (7,430,461 ) (111,177 ) —  —  (7,541,638 ) Finance lease (415,558 ) 9,919 —  —  (405,639 ) Intangible assets (31,481 ) 6,550 —  —  (24,931 ) Financial assets at fair value through profit or loss 12 3,445 —  —  3,457 Financial assets at fair value through other comprehensive income 27,381 25,178 (31,416 ) —  21,143 Deferred revenue 186,391 (16,411 ) —  —  169,980 Provisions 6,494,314 595,030 —  —  7,089,344 Doubtful receivables 801 1,673 —  —  2,474 Other finance liabilities 31,410 (14,142 ) —  4,150 21,418 Gains or losses on foreign exchange translation 91,411 42,905 —  —  134,316 Allowance for doubtful accounts 64,264 (6,029 ) —  —  58,235 Accrued income 10,002 6,612 —  —  16,614 Special deduction for property, plant and equipment (224,127 ) 8,968 —  —  (215,159 ) Others 1,445,827 16,456 25,289 —  1,487,572 (7,962,698 ) 896,758 (354,903 ) 4,555 (7,416,288 ) Deferred tax on unused tax losses and tax credit Unused tax losses 2,559,877 9,102,228 —  —  11,662,105 Excess of donation limit 69,185 11,861 —  —  81,046 Tax credit 134,690 15,719 —  —  150,409 2,763,752 9,129,808 —  —  11,893,560 ￦ (5,198,946 ) 10,026,566 (354,903 ) 4,555 4,477,272 2023 Beginning balance Amounts Amount Amounts recognized directly in equity Ending balance In millions of won Deferred tax on temporary differences Employee benefits ￦ 199,553 6,597 133,134 —  339,284 Cash flow hedge (55,340 ) 29,622 4,863 —  (20,855 ) Investments in subsidiaries, associates and joint ventures (8,377,687 ) 1,300,263 (40,213 ) —  (7,117,637 ) Property, plant and equipment (7,541,638 ) 534,361 —  —  (7,007,277 ) Finance lease (405,639 ) 179,943 —  —  (225,696 ) Intangible assets (24,931 ) 1,526 —  —  (23,405 ) Financial assets at fair value through profit or loss 3,457 (5,199 ) —  —  (1,742 ) Financial assets at fair value through other comprehensive income 21,143 16,839 (10,624 ) —  27,358 Deferred revenue 169,980 (13,580 ) —  —  156,400 Provisions 7,089,344 (47,684 ) —  —  7,041,660 Doubtful receivables 2,474 (74 ) —  —  2,400 Other finance liabilities 21,418 (3,426 ) —  —  17,992 Gains or losses on foreign exchange translation 134,316 (6,306 ) —  —  128,010 Allowance for doubtful accounts 58,235 (2,492 ) —  —  55,743 Accrued income 16,614 17,321 —  —  33,935 Special deduction for property, plant and equipment (215,159 ) 3,299 —  —  (211,860 ) Others 1,487,572 (277,889 ) 6,545 —  1,216,228 (7,416,288 ) 1,733,121 93,705 —  (5,589,462 ) Deferred tax on unused tax losses and tax credit Unused tax losses 11,662,105 1,676,638 —  —  13,338,743 Excess of donation limit 81,046 (34,724 ) —  —  46,322 Tax credit 150,409 52,665 —  —  203,064 11,893,560 1,694,569 —  —  13,588,129 ￦ 4,477,272 3,427,690 93,705 —  7,998,667 (6) Deferred tax assets (liabilities) recognized in the consolidated statements of financial position as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Deferred tax assets ￦ 10,934,375 13,161,802 Deferred tax liabilities (6,457,103 ) (5,163,135 ) ￦ 4,477,272 7,998,667 The Company changed the average tax rate used to measure deferred tax for the current year in accordance with the Korea Accounting Standards Board’s inquiry response. (7) Details of deductible temporary differences, tax losses and unused tax credits for which no deferred tax assets were recognized as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Deductible temporary differences and others ￦ 1,381,532 1,811,062 (8) Pillar Two Model Rules Pillar Two Model Rules legislation has been enacted or substantively enacted in certain jurisdictions where the Company operates. The legislation will be effective for the Company’s fiscal year beginning on January 1, 2024. The Company is currently assessing the potential exposure arising from the Pillar Two legislation. The assessment currently carried out is based on the tax filing documents for the recent period and the financial information for 2022 and 2023. In certain jurisdictions, the assessment is not yet completed since information required for the assessment is not collected enough. Based on the assessment carried out so far, the Company has identified potential exposure to Pillar Two income taxes on profits earned in Jordan, Laos and others where the expected Pillar Two effective tax rate is likely to be lower than 15%. Although the potential exposure is expected to arise from the constituent entities (mainly operating subsidiaries) in these jurisdictions, exposure may also arise from other jurisdictions where the assessment is not completed. The Company expects that the potential exposure to the Pillar Two income taxes is not significant. The Company continues to proceed the assessment and expects to complete the assessment in the first of half of 2024.

Assets Held-for-Sale

Assets Held-for-Sale	12 Months Ended
	Dec. 31, 2023
Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract]
Assets Held-for-Sale	42. Assets Held-for-Sale Assets held-for-sale 2022 2023 In millions of won Land (*1,2) ￦ 31,766 31,766 Buildings (*1,2) 12,981 13,881 Structures (*1) 1 1 ￦ 44,748 45,648 (*1) The board of directors of KEPCO Engineering & Construction Company, Inc., a subsidiary of the Company, made a resolution to sell its old office building in Yongin-si, held-for-sale (*2) The board of directors of Korea Electric Power Corporation, the controlling company, made a resolution to sell the Uijeongbu substation, and reclassified the buildings and land as assets held-for-sale transaction during the year ended December 31, 2022.

Expenses Classified by Nature

Expenses Classified by Nature	12 Months Ended
	Dec. 31, 2023
Expenses by nature [abstract]
Expenses Classified by Nature	43. Expenses Classified by Nature Expenses classified by nature for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 Selling and Cost of Total In millions of won Raw materials used ￦ —  18,660,477 18,660,477 Power purchase —  21,619,039 21,619,039 Salaries 1,121,188 4,276,494 5,397,682 Retirement benefit expense 113,127 488,263 601,390 Welfare and benefit expense 155,558 570,440 725,998 Insurance expense 17,909 104,544 122,453 Depreciation 219,427 11,551,897 11,771,324 Amortization of intangible assets 91,428 74,733 166,161 Bad debt expense 17,968 —  17,968 Commission 410,287 307,272 717,559 Advertising expense 29,230 9,552 38,782 Training expense 4,923 13,283 18,206 Vehicle maintenance expense 8,849 8,152 17,001 Publishing expense 3,568 3,310 6,878 Business promotion expense 3,522 3,777 7,299 Rent expense 43,650 194,234 237,884 Telecommunication expense 8,569 10,959 19,528 Transportation expense 870 53,365 54,235 Taxes and dues 93,446 529,380 622,826 Expendable supplies expense 9,052 41,414 50,466 Water, light and heating expense 12,351 43,025 55,376 Repairs and maintenance expense 123,134 2,494,861 2,617,995 Ordinary development expense 213,936 475,461 689,397 Travel expense 11,099 67,103 78,202 Clothing expense 10,540 7,994 18,534 Survey and analysis expense 889 3,992 4,881 Membership fee 1,331 8,492 9,823 Others 149,945 2,022,777 2,172,722 ￦ 2,875,796 63,644,290 66,520,086 2022 Selling and Cost of Total In millions of won Raw materials used ￦ —  34,832,581 34,832,581 Power purchase —  41,984,858 41,984,858 Salaries 1,142,360 4,329,099 5,471,459 Retirement benefit expense 109,758 505,612 615,370 Welfare and benefit expense 155,781 540,058 695,839 Insurance expense 20,835 106,672 127,507 Depreciation 244,676 12,056,455 12,301,131 Amortization of intangible assets 85,661 70,499 156,160 Bad debt expense 23,634 —  23,634 Commission 420,390 351,557 771,947 Advertising expense 33,739 10,552 44,291 Training expense 7,327 14,813 22,140 Vehicle maintenance expense 10,749 10,275 21,024 Publishing expense 3,732 3,014 6,746 Business promotion expense 3,198 3,340 6,538 Rent expense 47,680 186,439 234,119 Telecommunication expense 7,945 9,677 17,622 Transportation expense 1,012 113,845 114,857 Taxes and dues 122,177 554,320 676,497 Expendable supplies expense 9,617 47,159 56,776 Water, light and heating expense 17,950 60,002 77,952 Repairs and maintenance expense 152,449 2,586,975 2,739,424 Ordinary development expense 213,932 513,878 727,810 Travel expense 16,062 78,999 95,061 Clothing expense 13,044 8,778 21,822 Survey and analysis expense 1,126 4,322 5,448 Membership fee 1,469 16,912 18,381 Others 143,119 1,902,903 2,046,022 ￦ 3,009,422 100,903,594 103,913,016 2023 Selling and Cost of sales Total In millions of won Raw materials used ￦ —  27,135,770 27,135,770 Power purchase —  38,304,309 38,304,309 Salaries 1,098,460 4,416,706 5,515,166 Retirement benefit expense 89,533 370,769 460,302 Welfare and benefit expense 152,836 542,367 695,203 Insurance expense 27,726 119,964 147,690 Depreciation 241,533 12,623,380 12,864,913 Amortization of intangible assets 88,648 74,526 163,174 Bad debt expense 62,808 —  62,808 Commission 460,644 341,124 801,768 Advertising expense 30,305 8,856 39,161 Training expense 7,900 16,064 23,964 Vehicle maintenance expense 9,044 9,128 18,172 Publishing expense 3,281 2,879 6,160 Business promotion expense 2,559 2,523 5,082 Rent expense 44,807 161,749 206,556 Telecommunication expense 7,813 9,706 17,519 Transportation expense 1,099 102,502 103,601 Taxes and dues 112,449 574,617 687,066 Expendable supplies expense 7,252 47,252 54,504 Water, light and heating expense 16,207 41,200 57,407 Repairs and maintenance expense 154,062 2,620,200 2,774,262 Ordinary development expense 217,319 500,242 717,561 Travel expense 16,265 77,232 93,497 Clothing expense 10,450 9,490 19,940 Survey and analysis expense 1,068 4,156 5,224 Membership fee 1,503 15,164 16,667 Others 196,011 1,567,652 1,763,663 ￦ 3,061,582 89,699,527 92,761,109

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
	Dec. 31, 2023
Earnings per share [abstract]
Earnings (Loss) Per Share	44. Earnings (Loss) Per Share (1) Basic earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In won Basic earnings (loss) per share ￦ (8,263 ) (38,112 ) (7,512 ) (2) Diluted earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In won Diluted earnings (loss) per share ￦ (8,263 ) (38,112 ) (7,512 ) (3) Basic earnings (loss) per share Profit (loss) for the year and weighted average number of common shares used in the calculation of basic earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In millions of won except number of shares Profit (loss) attributable to owners of the controlling company ￦ (5,304,522 ) (24,466,853 ) (4,822,549 ) Profit (loss) used in the calculation of total basic earnings (loss) per share (5,304,522 ) (24,466,853 ) (4,822,549 ) Weighted average number of common shares 641,964,077 641,964,077 641,964,077 (4) Diluted earnings (loss) per share Diluted earnings (loss) per share is calculated by applying adjusted weighted average number of common shares under the assumption that all dilutive potential common shares are converted to common shares. Profit (loss) used in the calculation of total diluted earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In millions of won Profit (loss) used in the calculation of total diluted earnings (loss) per share ￦ (5,304,522 ) (24,466,853 ) (4,822,549 ) Weighted average number of common shares used in calculating diluted earnings (loss) per share are adjusted from weighted average number of common shares used in calculating basic earnings (loss) per share. Detailed information of the adjustment for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In number of shares Weighted average number of common shares 641,964,077 641,964,077 641,964,077 Diluted weighted average number of shares 641,964,077 641,964,077 641,964,077 (5) There are no potential dilutive instruments, thus diluted earnings (loss) per share are same as basic earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023.

Risk Management

Risk Management	12 Months Ended
	Dec. 31, 2023
Risk Management [Abstract]
Risk Management	45. Risk Management (1) Capital risk management The Company manages its capital to ensure that entities in the Company will be able to continue while maximizing the return to shareholder through the optimization of the debt and equity balance. The capital structure of the Company consists of net debt (offset by cash and cash equivalents) and equity. The Company’s overall capital risk management strategy remains consistent with the prior year. Details of the Company’s capital management accounts as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Total borrowings and debt securities ￦ 120,605,365 133,631,830 Cash and cash equivalents 3,234,780 4,342,887 Net borrowings and debt securities 117,370,585 129,288,943 Total equity 42,000,256 37,264,750 Debt to equity ratio 279.45 % 346.95 % (2) Financial risk management The Company is exposed to various risks related to its financial instruments, such as, market risk (currency risk, interest rate risk, price risk), credit risk. The Company monitors and manages the financial risks relating to the operations of the Company through internal risk reports which analyze exposures by degree and magnitude of risks. The Company uses derivative financial instruments to hedge certain risk exposures. The Company’s overall financial risk management strategy remains consistent with the prior year. (i) Credit risk Credit risk is the risk of finance loss to the Company if a customer or counterparty to a financial instrument fails to meet its contractual obligations, and arises primarily from the sales activities, securities and derivatives. In addition, credit risk exposure may exist within financial guarantees and unused line of credits. As these financial institutions the Company makes transactions with are reputable financial institutions, the credit risk from them are considered limited. The Company decides credit transaction limits based on evaluation of client’s credit, through information obtained from the credit bureau and disclosed financial position at committing contracts. ① Credit risk management Electricity sales, the main operations of the Company are the necessity for daily life and industrial activities of Korean nationals and have importance as one of the national key industries. The Company dominates the domestic market supplying electricity to customers. The Company is not exposed to significant credit risk as customers of the Company are diverse and are from various industries and areas. The Company uses publicly available information and its own internal data related to trade receivables, to rate its major customers and to measure the credit risk that a counter party will default on a contractual obligation. For the incurred but not recognized loss, it is measured considering overdue period. ② Impairment and allowance account In accordance with the Company policies, individual material financial assets are assessed on a regular basis, trade receivables that are assessed not to be impaired individually are, in addition, assessed for impairment on a collective basis. Value of the acquired collateral (including the confirmation of feasibility) and estimated collectable amounts are included in this assessment. Allowance for bad debts assessed on a collective basis are recognized for (i) the Company of assets which individually are not material and (ii) incurred but not recognized losses that are assessed using statistical methods, judgment and past experience. Book values of the financial assets represent the maximum exposed amounts of the credit risk. Details of the Company’s level of maximum exposure to credit risk as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Cash and cash equivalents ￦ 3,234,780 4,342,887 Financial assets at fair value through profit or loss(*1) 3,610,408 2,590,228 Derivative assets (trading) 693,072 730,948 Financial assets at fair value through other comprehensive income (debt securities) 529 4,627 Financial assets at amortized cost 26,998 38,843 Loans 1,013,371 988,331 Long-term/short-term financial instruments 1,353,080 1,412,315 Derivative assets (applying hedge accounting) 324,952 269,446 Trade and other receivables 12,614,902 14,179,322 Financial guarantee contracts(*2) 3,776,060 4,399,189 (*1) Equity investments held by the Company are excluded. (*2) Maximum exposure associated with the financial guarantee contracts is the maximum amounts of the obligation. For the year ended December 31, 2023, there are no financial assets and non-financial (ii) Market risk Market risk is the risk that the Company’s fair values of the financial instruments or future cash flows are affected by the changes in the market. Market risk consists of interest rate risk, foreign currency risk and other price risk. (iii) Sensitivity analysis Significant assets and liabilities with uncertainties in underlying assumptions ① Defined benefit obligation A sensitivity analysis of defined benefit obligation assuming a 1% increase and decrease movements in the actuarial valuation assumptions as of December 31, 2022 and 2023 are as follows: 2022 2023 Type Accounts 1% Increase 1% Decrease 1% Increase 1% Decrease In millions of won Future salary increases Increase (decrease) in defined benefit obligation ￦ 321,930 (283,658 ) 392,392 (361,359 ) Discount rate Increase (decrease) in defined benefit obligation (289,229 ) 337,033 (371,103 ) 415,361 Changes of employee benefits assuming a 1% increase and decrease movements in discount rate on plan asset for the years ended December 31, 2022 and 2023 are ￦27,495 million and ￦29,993 million, respectively. ② Provisions Changes in provisions due to movements in underlying assumptions as of December 31, 2022 and 2023 are as follows: Type Accounts 2022 2023 PCBs Inflation rate 1.98 % 2.40 % Discount rate 1.92 % 2.12 % Nuclear plants Inflation rate 2.25 % 1.91 % Discount rate 2.48 % 2.76 % Spent fuel Inflation rate 2.93 % 1.91 % Discount rate 4.49 % 2.49 % Radioactive waste Inflation rate 3.06 % 3.89 % Discount rate 2.62 % 3.65 % A sensitivity analysis of provisions assuming a 0.1% increase and decrease movements in the underlying assumptions as of December 31, 2022 and 2023 are as follows: 2022 2023 Type Accounts 0.1%p Increase 0.1%p Decrease 0.1%p Increase 0.1%p Decrease In millions of won Discount rate PCBs ￦ (169 ) 169 (123 ) 123 Nuclear plants (474,432 ) 491,360 (418,570 ) 432,847 Spent fuel (54,330 ) 56,453 (130,065 ) 130,761 Radioactive waste (15,089 ) 15,260 (13,538 ) 13,683 Inflation rate PCBs 169 (169 ) 123 (123 ) Nuclear plants 515,262 (498,258 ) 458,047 (443,531 ) Spent fuel 57,269 (55,191 ) 133,931 (128,607 ) Radioactive waste 14,190 (14,056 ) 13,291 (13,174 ) Management judgment effected by uncertainties in underlying assumptions ① Foreign currency risk The Company undertakes transactions denominated in foreign currencies; consequently, exposures to exchange rate fluctuations arise. The carrying amounts of the Company’s foreign currency denominated monetary assets and monetary liabilities as of December 31, 2022 and 2023 are as follows: Assets Liabilities Type 2022 2023 2022 2023 In thousands of foreign currencies AED 5,610 24,441 25,597 18,143 AUD 4,448 4,310 299,663 299,795 BDT 7,514 2,260 —  —  BWP 824 777 —  —  EGP —  1,665 1,162 1,941 CAD 89 —  595 —  CHF —  —  500,158 499,930 CZK —  —  153 —  EUR 1,976 12,259 41,073 81,744 GBP —  75 31 —  HKD —  —  4,014,446 5,079,189 IDR 598,697 25,567,281 1,323,840 2,118,580 INR 1,592,380 1,663,705 312,978 387,947 JOD 1,146 569 14 68,448 JPY 568,263 921,120 1,719,846 8,692,604 KZT 1,510 1,510 —  —  MGA 2,856,045 3,545,076 347,403 495,288 MMK 199,518 199,518 —  —  MYR 38,177 2,805 —  —  PHP 68,592 98,154 7,493 6,750 PKR 533,816 75,206,354 219,341 55,531 RUB —  —  2,881 —  SAR 1,713 937 9,710 —  SEK —  —  449,211 452,309 SGD —  279 —  2,191 THB —  —  389 —  USD 1,484,614 1,701,494 13,599,643 14,458,985 UYU 128,674 120,768 3,106 2,028 VND 1,184,670 848,242 4,495 —  ZAR 43,461 87,780 —  —  A sensitivity analysis on the Company’s income for the period assuming a 10% increase and decrease in currency exchange rates as of December 31, 2022 and 2023 are as follows: 2022 2023 Type 10% Increase 10% Decrease 10% Increase 10% Decrease In millions of won Increase (decrease) of profit before income tax ￦ (1,703,053 ) 1,703,053 (1,828,308 ) 1,828,308 Increase (decrease) of equity(*) (1,703,053 ) 1,703,053 (1,828,308 ) 1,828,308 (*) The effect on the shareholders’ equity excluding the impact of income taxes. The sensitivity analysis above is conducted for monetary assets and liabilities denominated in foreign currencies other than functional currency, without consideration of hedge effect of related derivatives, as of December 31, 2022 and 2023. To manage its foreign currency risk related to foreign currency denominated receivables and payables, the Company has a policy to enter into currency forward agreements. In addition, to manage its foreign currency risk related to foreign currency denominated expected sales transactions and purchase transactions, the Company enters into currency forward agreements. There is an economic relationship between the hedged item and the hedging instrument as the terms of cross-currency swap agreement is consistent with the terms of expected transaction (repayment of foreign debt securities and others). The hedging ratio is 1:1 as the risk of cross-currency swap agreement matches the hedged instrument. As of December 31, 202 3 ② Interest rate risk The Company is exposed to interest rate risk due to its borrowing with floating interest rates. A 1% increase or decrease is used when reporting interest rate risk internally to key management personnel and represents management’s assessment of the reasonably possible change in interest rates. The Company’s borrowings and debt securities with floating interest rates as of December 31, 2022 and 2023 are as follows: Type 2022 2023 In millions of won Short-term borrowings ￦ 3,154,972 4,435,420 Long-term borrowings 5,388,073 7,766,588 Debt securities 269,101 305,602 ￦ 8,812,146 12,507,610 A sensitivity analysis on the Company’s long-term borrowings and debt securities assuming a 1% increase and decrease in interest for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 Type 1%p Increase 1%p Decrease 1%p Increase 1%p Decrease In millions of won Increase (decrease) of profit before income tax ￦ (88,121 ) 88,121 (125,076 ) 125,076 Increase (decrease) of shareholder’s equity(*) (88,121 ) 88,121 (125,076 ) 125,076 (*) The effect on the shareholders’ equity excluding the impact of income taxes. The Company manages its interest rate risk by having a balanced portfolio of fixed and variable rate loans and borrowings. To manage this, the Company enters into interest rate swaps, in which it agrees to exchange, at specified intervals, the difference between fixed and variable rate interest amounts calculated by reference to an agreed-upon notional principal amount. The above analysis measures the interest rate risk before reflecting the hedge effect by related derivatives. ③ Electricity rates risk The Company is exposed to electricity rates risk due to changes in government regulations and policies on national power supply schemes and electricity billing rates, in consideration of the national economy. A sensitivity analysis on the Company’s income for the period assuming a 1% increase and decrease in price of electricity for the years ended December 31, 2022 and 2023 is as follows: 2022 2023 Type 1% Increase 1% Decrease 1% Increase 1% Decrease In millions of won Increase (decrease) of profit before income tax ￦ 661,990 (661,990 ) 829,548 (829,548 ) Increase (decrease) of shareholder’s equity(*) 661,990 (661,990 ) 829,548 (829,548 ) (*) The effect on the equity excluding the impact of income taxes. (iv) Liquidity risk The Company has established an appropriate liquidity risk management framework for the management of the Company’s short, medium and long-term funding and liquidity management requirements. The Company manages liquidity risk by continuously monitoring forecasted and actual cash flows, and by matching the maturity profiles of financial assets and liabilities. In addition, the Company has established credit lines on its trade financing and bank overdrafts, and through payment guarantees it has received, it maintains an adequate credit (borrowing) line. In addition, the Company has the ability to utilize excess cash or long-term borrowings for major construction investments. The expected maturities for non-derivative 2022 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Borrowings and debt securities ￦ 26,157,747 27,367,577 47,361,676 37,115,832 138,002,832 Lease liabilities 639,756 657,210 1,390,374 1,925,012 4,612,352 Trade and other payables(*1) 11,369,512 347,563 1,008,133 734,112 13,459,320 Financial guarantee contracts(*2) 105,091 54,310 3,495,437 121,222 3,776,060 ￦ 38,272,106 28,426,660 53,255,620 39,896,178 159,850,564 2023 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Borrowings and debt securities ￦ 50,878,929 29,046,036 42,420,850 32,778,830 155,124,645 Lease liabilities 641,525 588,850 1,309,996 1,694,729 4,235,100 Trade and other payables(*1) 8,477,209 364,443 833,394 589,004 10,264,050 Financial guarantee contracts(*2) 121,415 2,546,689 1,645,488 85,597 4,399,189 ￦  60,119,078  32,546,018  46,209,728  35,148,160  174,022,984 (*1) Excludes lease liabilities. (*2) This represents the total guarantee amounts associated with the financial guarantee contracts. Financial guarantee liabilities which are recognized as of December 31, 2022 and 2023 are W As the Company manages liquidity based on net assets and net liabilities, information about non-derivative financial assets should be included in the disclosure for better understanding of liquidity risk management. The expected maturities for non-derivative 2022 Type Less than 1 year 1~5 Years More than 5 years Other (*) Total In millions of won Cash and cash equivalents ￦ 3,234,780 — — — 3,234,780 Financial assets at fair value through other comprehensive income — — — 502,829 502,829 Financial assets at amortized cost 16,762 10,231 5 — 26,998 Loans 132,877 411,594 502,050 — 1,046,521 Long-term/short-term financial instruments 666,758 — 25 686,297 1,353,080 Financial assets at fair value through profit or loss 3,181,791 645 3,535 523,537 3,709,508 Trade and other receivables 10,464,191 1,083,593 1,080,831 — 12,628,615 ￦ 17,697,159 1,506,063 1,586,446 1,712,663 22,502,331 2023 Type Less than 1 year 1~5 Years More than 5 years Other (*) Total In millions of won Cash and cash equivalents ￦ 4,342,887 — — — 4,342,887 Financial assets at fair value through other comprehensive income — — — 502,443 502,443 Financial assets at amortized cost 28,905 9,938 — — 38,843 Loans 139,168 465,666 411,100 8,872 1,024,806 Long-term/short-term financial instruments 578,578 22 23 833,692 1,412,315 Financial assets at fair value through profit or loss 2,054,021 1,381 6,523 649,360 2,711,285 Trade and other receivables 11,990,515 911,822 1,292,539 1,280 14,196,156 ￦ 19,134,074 1,388,829 1,710,185 1,995,647 24,228,735 (*) The maturities cannot be presently determined. Derivative liabilities classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2022 and 2023 are as follows: 2022 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Net settlement — Trading ￦ —  —  —  —  —  Gross settlement — Trading and others (42,663 ) (15,225 ) (171,130 ) (84,924 ) (313,942 ) — Hedging —  (10,064 ) (5,176 ) (10,265 ) (25,505 ) ￦ (42,663) (25,289 ) (176,306) (95,189 ) (339,447 ) 2023 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Net settlement           — Trading ￦ —  —  —  —  —  Gross settlement — Trading and others (22,571 ) (11,566 ) (201,590 ) (130,119 ) (365,846 ) — Hedging —  (4,680 ) (13,243 ) (5,641 ) (23,564 ) ￦ (22,571 ) (16,246 ) (214,833 ) (135,760 ) (389,410 ) Derivative assets classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2022 and 2023 are as follows: 2022 Type Less than 1 year 1~2 2~5 Years More than 5 years Total In millions of won Net settlement — Trading ￦ —  —  —  —  —  Gross settlement — Trading 861,621  160,938 (352,657) 65,661 735,563 — Hedging 134,390 47,502 131,258 —  313,150 ￦ 996,011 208,440 (221,399 ) 65,661 1,048,713 2023 Type Less than 1 year 1~2 2~5 Years More than 5 years Total In millions of won Net settlement — Trading ￦ —  —  —  —  —  Gross settlement — Trading 257,073 123,132 169,004 145,728 694,937 — Hedging 78,769 61,031 131,687 —  271,487 ￦ 335,842 184,163 300,691 145,728 966,424 (3) Fair value risk The fair value of the Company’s actively-traded financial instruments (i.e., FVTPL, FVOCI, etc.) is based on the traded market-price as of the reporting period end. The fair value of the Company’s financial assets is the amount which the asset could be exchanged for or the amount a liability could be settled for. The fair values of financial instruments where no active market exists or where quoted prices are not otherwise available are determined by using valuation techniques. Valuation techniques include using recent arm’s length market transactions between knowledgeable, willing parties, if available, reference to the current fair value of another instrument that is substantially the same, discounted cash flow analysis and option pricing models. If there is a valuation technique commonly used by market participants to price the instrument and that technique has been demonstrated to provide reliable estimates of prices obtained in actual market transactions, the Company uses that technique. For trade receivables and payables, the Company considers the carrying value net of impairment as fair value. While for disclosure purposes, the fair value of financial liabilities is estimated by discounting the future contractual cash flows based on current market interest rates applied to similar financial instruments. (i) Fair value and book value of financial assets and liabilities as of December 31, 2022 and 2023 are as follows: 2022 2023 Type Book value Fair value Book value Fair value In millions of won Assets recognized at fair value Financial assets at fair value through other comprehensive income ￦ 502,829 502,829 502,443 502,443 Derivative assets (trading) 693,072 693,072 730,948 730,948 Derivative assets (hedge designated) 324,952 324,952 269,446 269,446 Financial assets at fair value through profit or loss 3,709,508 3,709,508 2,711,285 2,711,285 ￦ 5,230,361 5,230,361 4,214,122 4,214,122 Assets carried at amortized cost Financial assets at amortized cost ￦ 26,998 26,998 38,843 38,843 Loans and receivables 1,013,371 1,013,371 988,331 988,331 Trade and other receivables 12,614,902 12,614,902 14,179,322 14,179,322 Long-term financial instruments 686,322 686,322 833,737 833,737 Short-term financial instruments 666,758 666,758 578,578 578,578 Cash and cash equivalents 3,234,780 3,234,780 4,342,887 4,342,887 ￦ 18,243,131 18,243,131 20,961,698 20,961,698 Liabilities recognized at fair value Derivative liabilities (trading) ￦ 407,246 407,246 428,670 428,670 Derivative liabilities (hedge designated) 25,505 25,505 23,564 23,564 ￦ 432,751 432,751 452,234 452,234 Liabilities carried at amortized cost Secured borrowings ￦ 102,368 102,368 773,646 773,646 Unsecured bond 105,185,189 96,846,056 113,792,178 111,218,771 Lease liabilities 4,163,143 4,163,143 3,807,880 3,807,880 Unsecured borrowings 15,282,193 15,280,693 19,062,162 19,061,348 Trade and other payables(*) 13,459,320 13,459,320 10,264,050 10,264,050 Bank overdraft 35,615 35,615 3,844 3,844 ￦ 138,227,828 129,887,195 147,703,760 145,129,539 (*) Excludes lease liabilities. (ii) Interest rates used for determining fair value The interest rates used to discount estimated cash flows, when applicable, are based on the government yield curve at the reporting date plus an adequate credit spread. The discount rates used for calculating fair value as of December 31, 2022 and 2023 are as follows: Type 2022 2023 Derivatives 0.60% ~ 7.93% 0.93%~10.36% Borrowings and debt securities 0.75% ~ 5.84% 0.96%~5.84% Finance lease 0.00% ~ 17.08% 0.00%~17.03% (iii) Fair value hierarchy The following table provides an analysis of financial instruments that are measured subsequent to initial recognition at fair value, classified as Level 1, 2 or 3, based on the degree to which the fair value is observable. Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities; Level 2: Inputs other than quoted prices that are observable for the asset or liability either directly or indirectly; and Level 3: Inputs that are not based on observable market data. Fair values of financial instruments by hierarchy level as of December 31, 2022 and 2023 are as follows: 2022 Type Level 1 Level 2 Level 3 Total In millions of won Financial assets at fair value Financial assets at fair value through other comprehensive income ￦ 300,057 —  202,772 502,829 Derivative assets —  1,018,024 —  1,018,024 Financial assets at fair value through profit or loss —  3,703,179 6,329 3,709,508 ￦ 300,057 4,721,203 209,101 5,230,361 Financial liabilities at fair value Derivative liabilities ￦ —  432,751 —  432,751 2023 Type Level 1 Level 2 Level 3 Total In millions of won Financial assets at fair value Financial assets at fair value through other comprehensive income ￦ 285,054 —  217,389 502,443 Derivative assets —  1,000,394 —  1,000,394 Financial assets at fair value through profit or loss —  2,704,550 6,735 2,711,285 ￦ 285,054 3,704,944 224,124 4,214,122 Financial liabilities at fair value Derivative liabilities ￦ —  452,234 —  452,234 The fair value of financial assets traded in the market (including those measured at FVTPL and FVOCI) is measured at the closing bid price quoted at the end of the reporting period. Meanwhile, the fair value of unmarketable financial assets (including those measured at FVTPL and FVOCI) is calculated using the fair value measurement performed by external pricing service agents. In addition, the Company considered the major economic indicators and economic environment of the derivatives to be evaluated, and measured the fair value of the derivatives using a discounted cash flow model that reflects the Company’s credit risk. Changes of financial assets and liabilities which are classified as level 3 for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisitions Reclassified Valuation Disposal Foreign Ending In millions of won Financial assets at fair value Financial assets at fair value through profit or loss Cooperative ￦ 5,797 400 —  132 —  —  6,329 Financial assets at fair value through other comprehensive income Unlisted securities 160,790 9,451 —  33,237 —  (1,235 ) 202,243 Debt securities 491 —  —  38 —  —  529 2023 Beginning Acquisitions Reclassified Valuation Disposal Foreign Ending In millions of won Financial assets at fair value Financial assets at fair value through profit or loss Cooperative ￦ 6,329 —  270 136 —  —  6,735 Financial assets at fair value through other comprehensive income Unlisted securities 202,243 9,550 —  5,445 (5,332) 856 212,762 Debt securities 529 4,080 —  18 —  —  4,627

Service Concession Arrangements

Service Concession Arrangements	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about service concession arrangements [abstract]
Service Concession Arrangements	46. Service Concession Arrangements (1) Hydroelectric Power Generation at Semangka, Indonesia (BOT) (i) Significant terms and concession period of the arrangement Regarding Semangka hydroelectric power-generation business (BOT) in Indonesia, the Company has entered into a contract with PT. Perusahaan Listrik Negara (the “PT PLN”) whereby the Company shall provide electricity generated for about 30 years (2018 – 2048) after subsequent to the completion of plant construction and shall receive charge tariff rates designed to recover capital cost, fixed O&M cost, water usage cost, variable O&M cost and special facilities cost during the concession period. (ii) Rights and classification of the arrangement The Company has the rights to use and own the power plant during the concession period from 2018 to 2048. At the end of the concession period, PT PLN has an option to take over the ownership of the power plant from the Company. (iii) Classification method This project allows PT PLN to acquire ownership of the plant after the end of the 30 years contract period. (iv) The Company’s expected future collections of service concession arrangements as of December 31, 2023 are as follows: Type Amounts In millions of won Less than 1 year ￦ 32,354 1 ~ 2 years 32,281 2 ~ 3 years 32,321 Over 3 years 525,642 ￦ 622,598 (2) CPPAg Power Generation (i) Significant terms and concession period of the arrangement The Company has entered into a contract with CPPAg(The Central Power Purchasing Agency Guarantee Limited) whereby the Company shall provide electricity generated for approximately 30 years (2020 – 2050) subsequent to the completion of plant construction and shall receive charge tariff rates designed to recover capital cost, variable O&M cost, fixed O&M cost, water usage cost, insurance cost and others during the concession period. (ii) Rights and classification of the arrangement The Company has the rights to use and own the power plant during the concession period from 2020 to 2050. The Government of Pakistan has an option to take over the ownership of the power plant from the Company after the concession period has elapsed. (iii) Classification method This project allows the Government of Pakistan to acquire ownership of the plant after the end of the contract period. (iv) The Company’s expected future collections of service concession arrangements as of December 31, 2023 are as follows: Type Amounts In millions of won Less than 1 year ￦ 75,717 1 ~ 2 years 75,717 2 ~ 3 years 75,717 Over 3 years 893,254 ￦ 1,120,405

Related Parties

Related Parties	12 Months Ended
	Dec. 31, 2023
Disclosure of transactions between related parties [abstract]
Related Parties	47. Related Parties (1) Related parties of the Company as of December 31, 2023 are as follows: Type Related party Parent Republic of Korea government Subsidiaries (166 subsidiaries) Korea Hydro & Nuclear Power Co., Ltd., Korea South-East Power Co., Ltd., Korea Midland Power Co., Ltd., Korea Western Power Co., Ltd., Korea Southern Power Co., Ltd., Korea East-West Power Co., Ltd., KEPCO Engineering & Construction Company, Inc., KEPCO Plant Service & Engineering Co., Ltd., KEPCO Nuclear Fuel Co., Ltd., KEPCO KDN Co., Ltd., Gyeonggi Green Energy Co., Ltd., Korea Offshore Wind Power Co., Ltd., KOSEP Material Co., Ltd., KEPCO International HongKong Ltd., KEPCO International Philippines Inc., KEPCO Philippines Corporation, KEPCO Ilijan Corporation, KEPCO Gansu International Ltd., KEPCO Philippines Holdings Inc., KEPCO Neimenggu International Ltd., KEPCO Australia Pty., Ltd., KEPCO Shanxi International Ltd., KOMIPO Global Pte Ltd., KOSEP Australia Pty., Ltd., KOMIPO Australia Pty., Ltd., KOWEPO Australia Pty., Ltd., KOSPO Australia Pty., Ltd., KEPCO Netherlands B.V., KEPCO Middle East Holding Company, Qatrana Electric Power Company, KOWEPO International Corporation, KOSPO Jordan LLC, Korea Waterbury Uranium Limited Partnership, PT. Cirebon Power Service, EWP America Inc., KHNP Canada Energy Ltd., KEPCO Bylong Australia Pty., Ltd., KNF Canada Energy Limited, KEPCO Holdings de Mexico, KST Electric Power Company, S.A.P.I. de C.V., KEPCO Energy Service Company, KEPCO Netherlands S3 B.V., PT. KOMIPO Pembangkitan Jawa Bali, EWP Barbados 1 SRL, PT. Tanggamus Electric Power, KOMIPO America Inc., PT. EWP Indonesia, KEPCO Netherlands J3 B.V., Global One Pioneer B.V., Global Energy Pioneer B.V., Mira Power Limited, KEPCO KPS Philippines Corp., KOSPO Chile SpA, PT. KOWEPO Sumsel Operation And Maintenance Services, Commerce and Industry Energy Co., Ltd., Gyeongju Wind Power Co., Ltd., California Power Holdings, LLC, EWP Renewable Corporation, Hee Mang Sunlight Power Co., Ltd., Fujeij Wind Power Company, KOSPO Youngnam Power Co., Ltd., Chitose Solar Power Plant LLC., KEPCO Solar Co., Ltd., KEPCO Energy Solution Co., Ltd., KOSPO Power Services Ltda., KOEN Bylong Pty., Ltd., KOWEPO Bylong Pty., Ltd., KOSPO Bylong Pty., Ltd., EWP Bylong Pty., Ltd., KOWEPO Lao International, KOMIPO Bylong Pty., Ltd., Energy New Industry Specialized Investment Private Investment Trust., KEPCO Mangilao Holdings LLC, Mangilao Investment LLC, KEPCO Mangilao Solar, LLC, Jeju Hanlim Offshore Wind Co., Ltd., PT. Siborpa Eco Power, e-New e-New E-New K-SOLAR E-New Type Related party Associates (99 associates) Dongducheon Dream Power Co., Ltd., Korea Gas Corporation, Daegu Photovoltaic Co., Ltd., Haeng Bok Do Si Photovoltaic Power Co., Ltd., Korea Electric Power Industrial Development Co., Ltd., Goseong Green Power Co., Ltd., Gangneung Eco Power Co., Ltd., Shin Pyeongtaek Power Co., Ltd., Noeul Green Energy Co., Ltd., YTN Co., Ltd., Samcheok Eco Materials Co., Ltd., Gangwon Wind Power Co., Ltd., Gwangyang Green Energy Co., Ltd., Hyundai Green Power Co., Ltd., Korea Power Exchange, Taebaek Guinemi Wind Power Co., Ltd., Daeryun Power Co., Ltd., KNH Solar Co., Ltd., S-Power Co., Ltd., SPC Power Corporation, Gemeng International Energy Co., Ltd., PT. Cirebon Electric Power, KNOC Nigerian East Oil Co., Ltd., KNOC Nigerian West Oil Co., Ltd., PT Wampu Electric Power, PT. Bayan Resources TBK, Nepal Water & Energy Development Company Private Limited, Pioneer Gas Power Limited, Xe-Pian Xe-Namnoy Power Co., Ltd., PT. Mutiara Jawa, Jinbhuvish Power Generation Pvt. Ltd., Daejung Offshore Wind Power Co., Ltd., GS Donghae Electric Power Co., Ltd., Busan Green Energy Co., Ltd., Hansuwon KNP Co., Ltd., Korea Electric Power Corporation Fund, Energy Infra Asset Management Co., Ltd., Daegu clean Energy Co., Ltd., Yaksu ESS Co., Ltd., PND Solar Co., Ltd., Hyundai Eco Energy Co., Ltd., YeongGwang Yaksu Wind Electric Co., Ltd., Green Energy Electricity Generation Co., Ltd., Korea Energy Solutions Co., Ltd., ITR Co., Ltd., STN Co., Ltd. (formerly, Structure test network Co., Ltd.), Indeck Niles Development, LLC, Indeck Niles Asset Management, LLC, Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1, Suwon New Power Co., Ltd., Gwangbaek Solar Power Investment Co., Ltd., Go deok Clean Energy Co., Ltd., SureDataLab Co., Ltd., SEP Co., Ltd., Hankook Electric Power Information Co., Ltd., Tronix Co., Ltd., O2&B Global Co., Ltd., Muan Sunshine Solar Power Plant Co., Ltd., Bigeum Resident Photovoltaic Power Co., Ltd., Goesan Solar park Co., Ltd., Saemangeum Heemang Photovoltaic Co., Ltd., Bitgoel Eco Energy Co., Ltd., Jeju Gimnyeong Wind Power Co., Ltd., Seoroseoro Sunny Power Plant Co., Ltd., Muan Solar Park Co., Ltd., YuDang Solar Co., Ltd., Anjwa Smart Farm & Solar City Co., Ltd., KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.), G.GURU Co., Ltd., UD4M Co., Ltd., Dongbu Highway Solar Co., Ltd., Seobu Highway Solar Co., Ltd., Korea Energy Data Co., Ltd., Gangneung Sacheon Fuel Cell Co., Ltd., Kosture Co., Ltd., Taebaek Gadeoksan Wind Power Co., Ltd., Chuncheon Green Energy Co., Ltd., Yeomsubong Wind Power Co., Ltd., Yeongyang Wind Power Corporation II, Haeparang Energy Co., Ltd., Saemangeum Sebit Power Plant Co., Ltd., Boulder Solar III, LLC, PlatformN. Co., Ltd., PT. Cirebon Energi Prasarana, Future Convergence Technology Laboratory. Co., Ltd., ECO Motion Co., Ltd. (formerly, SC E&G Co., Ltd.), REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co., Ltd.), ACE, Co., Ltd., Environment and Energy Co., Ltd., Green Radiation Co., Ltd., Santiago Solar Power SpA, Yanggu Floating Photovoltaic Power Plant Inc., Changwon SG energy Co., Ltd., Donpyung Technology. Co., Ltd., Power Embedded, HORANG ENERGY Inc., Hoenggye Renewable Energy Co., Ltd., Haman Green Energy Co., Ltd., Songsan Green Energy Co., Ltd. Joint ventures (111 joint ventures) Daegu Green Power Co., Ltd., KEPCO SPC Power Corporation, KAPES, Inc., Honam Wind Power Co., Ltd., Korea Power Engineering Service Co., Ltd., Seokmun Energy Co., Ltd., Incheon New Power Co., Ltd., Chun-cheon Energy Co., Ltd., Yeonggwangbaeksu Wind Power Co., Ltd., KW Nuclear Components Co., Ltd., Busan Shinho Solar Power Co., Ltd., Global Trade Of Power System Co., Ltd., Expressway Solar-light Power Generation Co., Ltd., Gansu Datang Yumen Wind Power Co., Ltd., Datang Chifeng Renewable Power Co., Ltd., Rabigh Electricity Company, Rabigh Operation & Maintenance Company Limited, Datang KEPCO Chaoyang Renewable Power Co., Ltd., Shuweihat Asia Power Investment B.V., Shuweihat Asia Operation & Maintenance Company, Waterbury Lake Uranium L.P., ASM-BG Investicii AD, RES Technology AD, Jamaica Public Service Company Limited, KV Holdings, Inc., Amman Asia Electric Power Company, Kelar S.A., PT. Tanjung Power Indonesia, Nghi Son 2 Power LLC, Daehan Wind Power PSC, MOMENTUM, Barakah One Company, Nawah Energy Company, Yeonggwang Wind Power Co., Ltd., Chester Solar IV SpA, Chester Solar V SpA, Diego de Almagro Solar SpA, South Jamaica Power Company Limited, Daesan Green Energy Co., Ltd., RE Holiday Holdings LLC, RE Pioneer Holdings LLC, RE Barren Ridge 1 Holdings LLC, RE Astoria 2 LandCo LLC, RE Barren Ridge LandCo LLC, Laurel SpA, KIAMCO KOWEPO Bannerton Hold Co Pty Ltd, Cheong-Song Noraesan Wind Power Co., Ltd., Chester Solar I SpA, Solar Philippines Calatagan Corporation, Saemangeum Solar Power Co., Ltd., Chungsongmeon BongSan wind power Co., Ltd., Jaeun Resident Wind Power Plant Co., Ltd., DE Energia SpA, Dangjin Eco Power Co., Ltd., Haemodum Solar Co., Ltd., Yangyang Wind Power Co., Ltd., Horus Solar, S.A. de C.V., Recursos Solares PV de Mexico II, S.A. de C.V., Sunmex Renovables, S.A. de C.V., Stavro Holding II A.B., Solaseado Solar Power Co., Ltd., Yeongam Solar Power Co., Ltd., Samsu Wind Power Co., Ltd., Pulau Indah Power Plant Sdn. Bhd., NH-Amundi Global Infrastructure Investment Private Investment Trust 21, Shin-han BNPP Private Investment Trust for East-West Sunlight Dream, PT Barito Wahana Tenaga, Cheongna Energy Co., Ltd., Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.), OneEnergy Asia Limited, KAS INVESTMENT I LLC, KAS INVESTMENT II LLC, Energyco Co., Ltd., CAES, LLC, Hapcheon Floating Photovoltaic Power Plant Inc., Busan Industrial Solar Power Co., Ltd., Bitsolar Energy Co., Ltd., Naepo Green Energy Co., Ltd., Pulau Indah O&M Sdn. Bhd., Guadalupe Solar SpA, Omisan Wind Power Co., Ltd., Foresight Iberian Solar Group Holding, S.L., Yeongwol Eco Wind Co., Ltd., Gurae Resident Power Co., Ltd., Cheongju Eco Park Co., Ltd., Prime Swedish Holding AB, Enel X Midland Photovoltaic, LLC, Geumsungsan Wind Power Co., Ltd., KEPCO KPS CARABAO Corp., Goheung New Energy Co., Ltd., Gunsan Land Solar Co., Ltd., CapMan Lynx SCA, SICAR, International Offshore Power Transmission Holding Company Limited, Eumseong Eco Park Co., Ltd., Changwon Nu-ri Energy Co., Ltd., PungBack Wind Farm Corporation, Seobusambo highway photovoltaics Co., Ltd., Seungmun Green Energy, Pyeongchang Wind Power Co., Ltd., Trumbull Asset Management, LLC, S-Power Chile SpA, Taebaek Wind Power Co., Ltd., Yangyang Suri Wind Power Co., Ltd., KEPCO for Power Company, Jeonju Bio Green Energy Co., Ltd., Kumyang Eco Park Co., Ltd., Jeongeup Green Power Co., Ltd., Hadong E-factory Co., Ltd., Namyangju Combined Heat and Power Co., Ltd., Wadi Noor Solar Power Company SAOC, Fairhaven Energy Storage LLC Others (2 others) Korea Development Bank, KEPCO Lebanon SARL (2) Transactions between the Company and its subsidiaries are eliminated during the consolidation and are not disclosed in notes. (3) Related party transactions for the years ended December 31, 2021, 2022 and 2023 are as follows: <Sales and Others> Sales and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Korea Gas Corporation Electricity sales ￦ 96,362 155,309 140,630 Goseong Green Power Co., Ltd. Electricity sales 514,470 1,062,108 842,270 Dongducheon Dream Power Co., Ltd. Electricity sales 19,923 8,942 16,138 Saemangeum Sebit Power Plant Co., Ltd. Electricity sales — 1,418 2,313 Daejung Offshore Wind Power Co., Ltd. Electricity sales 46 46 84 Daegu Photovoltaic Co., Ltd. Electricity sales 207 268 408 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Electricity sales 2 2 3 Korea Electric Power Industrial Development Co., Ltd. Service 11,208 10,369 11,115 Gangneung Eco Power Co., Ltd. Fuel sales 14,200 459,404 943,063 Shin Pyeongtaek Power Co., Ltd. Electricity sales 23,501 27,486 91,830 Noeul Green Energy Co., Ltd. Electricity sales 30 9,396 8,431 Samcheok Eco Materials Co., Ltd. Electricity sales 620 546 615 YTN Co., Ltd. Electricity sales 1,922 2,180 2,908 Busan Green Energy Co., Ltd. Electricity sales 49 5,055 10,733 Gunsan Bio Energy Co., Ltd. Electricity sales 20 — — Korea Electric Vehicle Charging Service (*5) Electricity sales 3,039 3,686 — Energy Infra Asset Management Co., Ltd. Electricity sales 4,629 — 89 Gangwon Wind Power Co., Ltd. Electricity sales 1,865 1,549 2,464 Gwangyang Green Energy Co., Ltd. Electricity sales 486 1,848 1,492 Bigeum Resident Photovoltaic Power Co., Ltd. Electricity sales 755 660 888 Hyundai Green Power Co., Ltd. Electricity sales 11,934 7,063 6,668 Korea Power Exchange Service 39,796 16,596 52,262 Taebaek Wind Power Co., Ltd. (*1) Service 44 861 — Taebaek Guinemi Wind Power Co., Ltd. Electricity sales 26 — — Pyeongchang Wind Power Co., Ltd. Electricity sales 1,180 1,323 — Daeryun Power Co., Ltd. Electricity sales 1,944 2,016 3,187 Changjuk Wind Power Co., Ltd. (*4) Electricity sales 463 1,350 — GS Donghae Electric Power Co., Ltd. Electricity sales 21,127 5,238 28,164 KNH Solar Co., Ltd. Electricity sales 14 13 15 S-Power Co., Ltd. Service 5,229 4,588 4,965 Chuncheon Green Energy Co., Ltd. Electricity sales — 2 82 Yeongyang Wind Power Corporation II Commission — — 150 PND Solar Co., Ltd. Electricity sales 416 427 547 Hyundai Eco Energy Co., Ltd. Electricity sales 187 277 1,236 YeongGwang Yaksu Wind Electric Co., Ltd. Electricity sales 78 66 96 Taebaek Gadeoksan Wind Power Co., Ltd. Electricity sales 295 1,952 3,998 Korea Energy Solutions Co., Ltd. Electricity sales 2 2 2 ITR Co., Ltd. Service 3 6 3 STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Service 5 7 — Namjeongsusang Solar Power Operation Co., Ltd. (*3) Electricity sales 22 21 31 Sales and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 Service ￦ 399 394 405 Bitgoel Eco Energy Co., Ltd. Electricity sales 282 1,397 1,581 Jeju Gimnyeong Wind Power Co., Ltd. Electricity sales — 367 315 Seoroseoro Sunny Power Plant Co., Ltd. Electricity sales — 1 2 Muan Solar park Co., Ltd. Electricity sales 232 950 3,083 YuDang Solar Co., Ltd. Electricity sales — 160 100 Anjwa Smart Farm & Solar City Co., Ltd. Electricity sales 624 1,068 2,479 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Electricity sales 155 185 163 Saemangeum Heemang Photovoltaic Co., Ltd. Electricity sales 13 5,740 3,538 UD4M Co., Ltd. Electricity sales 4 2 3 Dongbu Highway Solar Co., Ltd. Electricity sales 5 8 11 Seobu Highway Solar Co., Ltd. Electricity sales 8 8 12 Santiago Solar Power SpA Dividends income — — 586 Gwangbaek Solar Power Investment Co., Ltd. Electricity sales — — 644 Go deok Clean Energy Co., Ltd. Electricity sales — — 4,685 SureDataLab Co., Ltd. Electricity sales 1 1 1 Suwon New Power Co., Ltd. Electricity sales 1,820 118 91 Hankook Electric Power Information Co., Ltd. Electricity sales 1 — — Kosture Co., Ltd. Electricity sales 1 5 — PlatformN. Co., Ltd. Others — 14 16 Muan Sunshine Solar Power Plant Co., Ltd. Electricity sales 52 17 403 Gangneung Sacheon Fuel Cell Co., Ltd. Electricity sales —  151 133 11 Associates (Overseas) Electricity sales 125,723 548,507 385,605 <Joint ventures> Seobusambo highway photovoltaics Co., Ltd. Electricity sales — 3  16 Yangyang Suri Wind Power Co., Ltd. Electricity sales — — 169 Naepo Green Energy Co., Ltd. Electricity sales 467 761 3,462 Cheongna Energy Co., Ltd. Others 16,469 39,802 32,835 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Service 8,159 7,761 2,110 Daegu Green Power Co., Ltd. Electricity sales 1,053 1,190 1,694 Prime Swedish Holding AB Electricity sales — 284 292 KAPES, Inc. Commission 413 450 1,604 Honam Wind Power Co., Ltd. Electricity sales 71 242 610 Jeongam Wind Power Co., Ltd Electricity sales 588 — — Korea Power Engineering Service Co., Ltd. Service 339 268 159 Seokmun Energy Co., Ltd. Service 1,701 1,685 1,792 Incheon New Power Co., Ltd. Construction 14 14 458 Sales and others Company name Transaction type 2021 2022 2023 In millions of won <Joint ventures> Chun-cheon Energy Co., Ltd. Electricity sales ￦ 2,329 2,505 2,976 Yeonggwangbaeksu Wind Power Co., Ltd. Electricity sales 1,836 1,898 1,962 Yeonggwang Wind Power Co., Ltd. Electricity sales 818 871 3,607 Western Power Changgi Solar Co., Ltd. Electricity sales 1,920 —  —  NH-Amundi Service 1,727 1,415 1,568 KW Nuclear Components Co., Ltd. Service 2,598 1,624 1,612 Taebaek Wind Power Co., Ltd. (*1) Others —  —  2,864 Pyeongchang Wind Power Co., Ltd. Electricity sales —  —  2,087 KEPCO-Uhde Inc. (*2) Electricity sales 10 12 — Busan Shinho Solar Power Co., Ltd. Electricity sales 376 502 1,205 Expressway Solar-light Power Generation Co., Ltd. Electricity sales — — 43 Goheung New Energy Co., Ltd. Electricity sales — 141 3,214 Gunsan Land Solar Co., Ltd. Electricity sales — 518 809 Daesan Green Energy Co., Ltd. Electricity sales 523 394 760 Cheong-Song Noraesan Wind Power Co., Ltd. Electricity sales 30 698 901 Chungsongmeon BongSan wind power Co., Ltd. Electricity sales 1 1 1 Saemangeum Solar Power Co., Ltd. Service 1,141 100 — Dangjin Eco Power Co., Ltd. Electricity sales 32 32 40 Yangyang Wind Power Co., Ltd. Electricity sales — — 13 Energyco Co., Ltd. Electricity sales 1 463 457 Hapcheon Floating Photovoltaic Power Plant Inc. Electricity sales — 544 88 Busan Industrial Solar Power Co., Ltd. Electricity sales 9 14 22 Bitsolar Energy Co., Ltd. Electricity sales 296 498 357 Omisan Wind Power Co., Ltd. Electricity sales 1 1 26 S-Power Chile SpA Interest income — — 20 Haemodum Solar Co., Ltd. Electricity sales 6 42 431 Yeongam Solar Power Co., Ltd. Electricity sales 339 379 1,131 Samsu Wind Power Co., Ltd. Electricity sales — — 514 Solaseado Solar Power Co., Ltd. Electricity sales 2,890 1,851 1,876 Yeongwol Eco Wind Co., Ltd. Electricity sales — — 102 Gurae Resident Power Co., Ltd. Electricity sales — — 8 Cheongju Eco Park Co., Ltd. Electricity sales — 204 6,397 Enel X Midland Photovoltaic, LLC Electricity sales — 12 11 Eumseong Eco Park Co., Ltd. Electricity sales — 2 19 Geumsungsan Wind Power Co., Ltd. Electricity sales — 7 68 41 Joint ventures (Overseas) Electricity sales 773,291 606,513 746,989 <Others> Korea Development Bank Electricity sales 4,177 4,134 5,467 Interest income 756 2,222 5,930 <Purchase and Others> Purchase and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Korea Gas Corporation Electricity sales ￦ 5,646,713 11,996,402 8,873,781 Goseong Green Power Co., Ltd. Electricity sales 987,540 1,905,502 1,572,074 Dongducheon Dream Power Co., Ltd. Electricity sales 750,148 2,244,332 1,744,247 Saemangeum Sebit Power Plant Co., Ltd. Electricity sales —  23,159 22,365 Daegu Photovoltaic Co., Ltd. Electricity sales 3,532 4,744 4,247 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Electricity sales 393 563 408 Korea Electric Power Industrial Development Co., Ltd. Service 241,925 251,468 305,105 Gangneung Eco Power Co., Ltd. Others —  —  6,996 Shin Pyeongtaek Power Co., Ltd. Electricity sales 653,306 957,294 1,040,965 Noeul Green Energy Co., Ltd. Electricity sales 10,014 14,176 10,466 Samcheok Eco Materials Co., Ltd. Electricity sales 13,612 12,019 8,130 YTN Co., Ltd. Electricity sales 388 304 309 Busan Green Energy Co., Ltd. Electricity sales 18,996 26,219 23,211 Korea Electric Vehicle Charging Service (*5) Electricity sales 393 —  —  Energy Infra Asset Management Co., Ltd. Service 2,657 2,779 2,701 Yaksu ESS Co., Ltd. Electricity sales 1,715 851 508 Gangwon Wind Power Co., Ltd. Electricity sales 19,623 40,130 32,525 Goesan Solar park Co., Ltd. Electricity sales 6,209 7,642 6,530 Korea Power Exchange Service 86,716 93,817 82,572 Taebaek Wind Power Co., Ltd. (*1) Service and REC 5,930 7,442 —  Taebaek Guinemi Wind Power Co., Ltd. Electricity sales 5,910 6,793 5,529 Pyeongchang Wind Power Co., Ltd. Design service and others 4,099 3,884 —  Daeryun Power Co., Ltd. Electricity sales 157,234 428,534 353,371 Changjuk Wind Power Co., Ltd. (*4) Electricity sales 6,213 9,027 —  GS Donghae Electric Power Co., Ltd. Electricity sales 760,377 1,035,263 1,047,584 KNH Solar Co., Ltd. Electricity sales 3,222 4,348 3,535 S-Power Service 608,530 1,091,741 973,646 Yeongyang Wind Power Corporation II Commission —  —  1,457 PND Solar Co., Ltd. Electricity sales 5,502 6,173 5,301 Hyundai Eco Energy Co., Ltd. Electricity sales 25,762 29,209 26,266 YeongGwang Yaksu Wind Electric Co., Ltd. Electricity sales 11,729 7,382 6,776 Taebaek Gadeoksan Wind Power Co., Ltd. Electricity sales 16,360 25,880 34,940 Korea Energy Solutions Co., Ltd. Electricity sales —  102 128 STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Others —  —  10 Green Energy Electricity Generation Co., Ltd. Electricity sales 1,238 2,962 948 Namjeongsusang Solar Power Operation Co., Ltd. (*3) Electricity sales 14,286 9,491 —  Bitgoel Eco Energy Co., Ltd. Service and others —  930 28,334 Jeju Gimnyeong Wind Power Co., Ltd. Electricity sales 12,833 12,364 8,635 Seoroseoro Sunny Power Plant Co., Ltd. REC and others 217 1,138 874 Muan Solar Park Co., Ltd. REC and others 31,017 17,052 16,554 YuDang Solar Co., Ltd. REC and others 3,495 1,915 1,860 Anjwa Smart Farm & Solar City Co., Ltd. Electricity sales 24,601 16,942 17,332 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Others —  42,651 62,212 Saemangeum Heemang Photovoltaic Co., Ltd. Electricity sales —  1,039 440 G.GURU Co., Ltd. Electricity sales —  452 —  Purchase and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> UD4M Co., Ltd. Electricity sales ￦ — 313 117 Dongbu Highway Solar Co., Ltd. Electricity sales 2,605 3,516 2,937 Seobu Highway Solar Co., Ltd. Electricity sales 2,963 3,452 2,880 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) Interest income/ — — 6 Green Radiation Co., Ltd. Ordinary —  —  11 Gwangbaek Solar Power Investment Co., Ltd. Electricity sales 742 602 565 Go deok Clean Energy Co., Ltd. Electricity sales — — 11,545 PlatformN. Co., Ltd. Others — 475 — Muan Sunshine Solar Power Plant Co., Ltd. Electricity sales 15,900 19,514 16,328 Gangneung Sacheon Fuel Cell Co., Ltd. Electricity sales — — 1,324 11 Associates (Overseas) Electricity sales 502 101,790 91,233 <Joint ventures> Seobusambo highway photovoltaics Co., Ltd. Electricity sales — 103 502 Cheongna Energy Co., Ltd. Service 57 80 60 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Service 5,409 13,872 8,151 Daegu Green Power Co., Ltd. Electricity sales 289,052 508,601 370,787 KAPES, Inc. Commission 64,140 9,306 19,112 Honam Wind Power Co., Ltd. Electricity sales 4,807 7,662 8,643 Jeongam Wind Power Co., Ltd. Electricity sales 3,145 — — Korea Power Engineering Service Co., Ltd. Service 1,315 830 812 Seokmun Energy Co., Ltd. Service 44,315 60,799 60,009 Chun-cheon Energy Co., Ltd. Electricity sales 327,536 585,689 585,656 Yeonggwangbaeksu Wind Power Co., Ltd. Electricity sales 9,471 13,990 17,228 Yeonggwang Wind Power Co., Ltd. Electricity sales 21,004 31,221 40,605 Western Power Changgi Solar Co., Ltd. Electricity sales 5,852 — — KW Nuclear Components Co., Ltd. Service 96 9,504 14,114 Taebaek Wind Power Co., Ltd. (*1) Service — — 7,476 Pyeongchang Wind Power Co., Ltd. Electricity sales — — 3,542 Busan Shinho Solar Power Co., Ltd. Electricity sales 7,895 10,601 10,248 Global Trade Of Power System Co., Ltd. Service 323 715 223 Expressway Solar-light Power Generation Co., Ltd. Electricity sales 3,146 4,016 3,362 Goheung New Energy Co., Ltd. Electricity sales — —  5,264 Gunsan Land Solar Co., Ltd. Electricity sales — 533 486 Daesan Green Energy Co., Ltd. Electricity sales 146,776 129,736 139,721 Cheong-Song Noraesan Wind Power Co., Ltd. Electricity sales — 980 882 Saemangeum Solar Power Co., Ltd. Electricity sales 5 1 — Dangjin Eco Power Co., Ltd. Electricity sales 4,139 5,696 5,583 Yangyang Wind Power Co., Ltd. Service and — — 10 Energyco Co., Ltd. Electricity sales — 7,898 6,539 Purchase and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Hapcheon Floating Photovoltaic Power Plant Inc. Service and REC — 2,526 — Busan Industrial Solar Power Co., Ltd. Electricity sales 2,815 4,575 3,656 Bitsolar Energy Co., Ltd. Electricity sales 5,703 13,030 12,946 Omisan Wind Power Co., Ltd. Electricity sales 7 — — Haemodum Solar Co., Ltd. Electricity sales 1,625 2,168 402 Yeongam Solar Power Co., Ltd. Electricity sales 47,805 44,745 34,981 Samsu Wind Power Co., Ltd. Electricity sales 2,800 10,605 8,269 Solaseado Solar Power Co., Ltd. Electricity sales 31,031 28,698 18,259 Gurae Resident Power Co., Ltd. Electricity sales — — 1 Cheongju Eco Park Co., Ltd. Electricity sales — 94,409 95,059 Enel X Midland Photovoltaic, LLC Electricity sales — 1,871 2,431 Eumseong Eco Park Co., Ltd. Electricity sales — — 27,765 41 Joint ventures (Overseas) Electricity sales 54,135 16,859 17,222 <Others> Korea Development Bank Interest expense 2,756 4,208 5,559 Dividends paid 256,862 12 — (*1) Taebaek Wind Power Co., Ltd. was changed from an associate to a joint venture for the year ended December 31, 2023. (*2) KEPCO-Uhde Inc. is not a related party of the Company as of December 31, 2023 as the liquidation process was completed for the year ended December 31, 2023. (*3) Namjeongsusang Solar Power Operation Co., Ltd. is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2023. (*4) Changjuk Wind Power Co., Ltd. was reclassified from an associate to a subsidiary for the year ended December 31, 2022, and the amount is before reclassification to a subsidiary. (*5) Korea Electric Vehicle Charging Service is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2022. (4) Receivables and payables arising from related party transactions as of December 31, 2022 and 2023 are as follows: Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Associates> Korea Gas Corporation Trade receivables ￦ 12,415 14,671 —  —  Non-trade receivables and others 54,232 12,513 —  —  Trade payables —  —  1,882,607 480,974 Non-trade payables and others —  —  1,294 1,378 Goseong Green Power Co., Ltd. Trade receivables 76,254 55,719 —  —  Non-trade 14 15 —  —  Trade payables —  —  182,095 120,270 Non-trade —  —  52,515 48,621 Dongducheon Dream Power Co., Ltd. Trade receivables 592 2,573 —  —  Non-trade 270 478 —  —  Trade payables —  —  293,256 117,975 Saemangeum Sebit Power Plant Co., Ltd. Non-trade 653 341 — —  Daejung Offshore Wind Power Co., Ltd. Non-trade 123 263 —  —  Daegu Photovoltaic Co., Ltd. Trade payables —  —  135 105 Non-trade —  —  2 —  Korea Electric Power Industrial Trade receivables 164 176 —  —  Development Co., Ltd. Non-trade 2 —  —  —  Trade payables —  —  150 2,021 Non-trade —  —  9,588 8,077 Gangneung Eco Power Co., Ltd. Trade receivables 19,364 59,623 —  —  Non-trade 478 —  —  —  Non-trade —  —  94 94 Shin Pyeongtaek Power Co., Ltd. Trade receivables 7,375 1,814 —  —  Non-trade 1,068 4,933 —  —  Trade payables —  —  109,274 86,801 Non-trade —  —  101 385 Noeul Green Energy Co., Ltd. Trade receivables 3 6 —  —  Non-trade 9,365 18,356 —  —  Non-trade —  —  2,468 3,005 Samcheok Eco Materials Co., Ltd. Trade receivables 46 33 —  —  YTN Co., Ltd. Trade receivables 112 133 —  —  Busan Green Energy Co., Ltd. Trade receivables 1 1 —  —  Non-trade 26,681 32,720 —  —  Non-trade —  —  4,415 3,642 Gunsan Bio Energy Co., Ltd.(*4) Non-trade 11,728 —  —  — Yaksu ESS Co., Ltd. Trade payables —  —  —  538 Gangwon Wind Power Co., Ltd. Trade receivables 6 13 —  —  Trade payables —  —  5,197 3,206 Gwangyang Green Energy Co., Ltd. Trade receivables —  1,069 —  —  Non-trade receivables and others 1,436 716 —  —  Bigeum Resident Photovoltaic Power Co., Ltd. Trade receivables 343 406 —  —  Non-trade 516 1,316 —  —  Goesan Solar park Co., Ltd. Trade payables —  —  346 56 Hyundai Green Power Co., Ltd. Trade receivables 839 903 —  —  Korea Power Exchange Trade receivables 223 1,583 —  —  Non-trade —  1 —  —  Trade payables —  —  —  16,367 Non-trade —  —  2,405 2,520 Taebaek Wind Power Co., Ltd. Trade payables —  —  680 —  Non-trade —  —  178 —  Pyeongchang Wind Power Co., Ltd.(*1) Trade receivable 3 —  —  —  Non-trade payables and others —  —  211 —  Taebaek Guinemi Wind Power Co., Ltd. Trade payables —  —  885 572 Non-trade payables and others —  —  —  286 Daeryun Power Co., Ltd. Trade receivables 195 326 —  —  Trade payables —  —  55,725 32,140 GS Donghae Electric Power Co., Ltd. Trade receivables 872 159 —  —  Non-trade 1,558 169 —  —  Trade payables —  —  72,947 72,951 Non-trade —  —  14,565 125 Yeongyang Wind Power Corporation II Non-trade receivables and others —  165 —  —  KNH Solar Co., Ltd. Trade receivables 1 1 —  —  Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Associates> S-Power Trade receivables ￦ 77 213 —  —  Non-trade 44 53 —  —  Trade payables —  —  135,504 79,459 Non-trade —  —  11 —  PND Solar Co., Ltd. Trade payables —  —  210 296 Hyundai Eco Energy Co., Ltd. Trade receivables 22 28 —  —  Trade payables —  —  738 408 YeongGwang Yaksu Wind Electric Co., Ltd. Trade receivables 7 10 —  —  Non-trade receivables and others —  2,294 —  —  Trade payables —  —  589 828 Non-trade —  —  2,050 —  Taebaek Gadeoksan Wind Power Co., Ltd. Non-trade 97 1,539 —  —  Trade payables —  —  12,739 12,739 Non-trade —  —  5 7 Korea Energy Solutions Co., Ltd. Non-trade —  —  94 —  Green Energy Electricity Generation Co., Ltd. Trade payables —  —  —  62 Non-trade —  —  —  45 Namjeongsusang Solar Power Operation Co., Ltd. (*3) Trade receivables 2 —  —  —  Bitgoel Eco Energy Co., Ltd. Non-trade 6 131 —  —  Trade payables —  —  —  6,226 Non-trade —  —  1,023 —  Jeju Gimnyeong Wind Power Co., Ltd. Non-trade 130 112 —  —  Trade payables —  —  1,758 1,467 Non-trade —  —  —  9 Muan Solar Park Co., Ltd. Trade receivables 25 —  —  —  Non-trade 9 4 —  —  Anjwa Smart Farm & Solar City Co., Ltd. Non-trade —  —  921 1,296 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Trade receivables 1 1 —  —  Trade payables —  —  5,485 5,485 Saemangeum Heemang Photovoltaic Co., Ltd. Non-trade 3,435 —  —  —  Non-trade —  —  1 —  Dongbu Highway Solar Co., Ltd. Trade receivables 1 1 —  —  Trade payables —  —  2 —  Non-trade —  —  2 —  Seobu Highway Solar Co., Ltd. Trade receivables 1 1 —  —  Trade payables —  —  8 —  Non-trade —  —  3 —  Gwangbaek Solar Power Investment Co., Ltd. Non-trade —  —  61 —  Go deok Clean Energy Co., Ltd. Non-trade —  4,562 —  —  Non-trade —  —  —  5,288 Suwon New Power Co., Ltd. Trade receivables —  876 —  —  Non-trade 1,280 560 —  —  Tronix Co., Ltd. Non-trade 1 —  —  —  KOSTURE Co., Ltd. Trade receivables 6 —  —  —  Muan Sunshine Solar Power Plant Co., Ltd. Trade payables —  —  3,076 1,440 Non-trade —  —  1,265 —  PlatformN. Co., Ltd. Non-trade —  —  232 —  9 Associates (Overseas) Trade receivables 93 —  —  —  Non-trade 49,409 77,814 —  —  Non-trade —  —  502 6,242 <Joint ventures> Daegu Green Power Co., Ltd. Trade receivables 53 122 —  —  Non-trade 56 55 66,715 32,222 Trade payables —  —  Seobusambo highway photovoltaics Co., Ltd. Trade receivables —  1 —  —  Non-trade —  4 —  —  Yangyang Suri Wind Power Co., Ltd. Non-trade receivables and others —  55 —  —  KAPES, Inc. Trade receivables 2 4 —  —  Non-trade —  89 —  —  Non-trade —  —  106 3,791 Honam Wind Power Co., Ltd. Trade payables —  —  515 515 Korea Power Engineering Service Co., Ltd. Non-trade 47 48 —  —  Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Joint ventures> Non-trade ￦ —  —  77 76 Seokmun Energy Co., Ltd. Trade receivables 67 44 —  —  Non-trade 113 199 —  —  Trade payables —  —  7,000 7,000 Naepo Green Energy Co., Ltd. Trade receivables 169 190 —  —  Non-trade —  1 —  —  Non-trade —  —  3 —  Chun-cheon Energy Co., Ltd. Trade receivables 124 239 —  —  Non-trade 165 165 —  —  Trade payables —  —  79,117 79,117 Non-trade payables and others —  —  —  2 Yeonggwangbaeksu Wind Power Co., Ltd. Trade receivables 8 10 —  —  Non-trade 166 —  —  —  Trade payables —  —  1,076 1,076 Cheongna Energy Co., Ltd. Trade receivables 17,324 13,898 —  —  Non-trade 1,654 2,160 —  —  Non-trade —  —  1 1 Yeonggwang Wind Power Co., Ltd. Trade receivables 12 15 —  —  Non-trade 62 56 —  —  Trade payables —  —  2,251 2,251 KW Nuclear Components Co., Ltd. Trade receivables 4 —  —  —  Non-trade 18 17 —  —  Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Trade receivables 79 84 —  —  Non-trade 10,218 10,779 —  —  Trade payables —  —  1,027 721 Non-trade —  —  9,119 14,193 Taebaek Wind Power Co., Ltd. (*1) Trade payables —  —  —  603 Non-trade —  —  —  341 Pyeongchang Wind Power Co., Ltd. Trade receivables —  4 —  —  KEPCO-Uhde Inc. (*2) Non-trade —  —  10 —  Busan Shinho Solar Power Co., Ltd. Trade receivables 3 3 —  —  Trade payables —  —  304 304 Expressway Solar-light Power Generation Co., Ltd. Trade payables —  —  166 220 Gunsan Land Solar Co., Ltd. Non-trade 138 295 —  —  Daesan Green Energy Co., Ltd. Trade receivables 18 13 —  —  Non-trade 218 170 —  —  Trade payables —  —  4,946 4,946 Cheong-Song Noraesan Wind Power Co., Ltd. Trade receivables 2 2 —  —  Saemangeum Solar Power Co., Ltd. Non-trade 4,368 4,368 —  —  Dangjin Eco Power Co., Ltd. Trade receivables 3 4 —  —  Trade payables —  —  222 222 Non-trade —  —  105 176 Yangyang Wind Power Co., Ltd. Non-trade —  13 —  —  Energyco Co., Ltd. Non-trade —  3 —  —  Trade payables —  —  —  99 Hapcheon Floating Photovoltaic Power Plant Inc. Trade receivables 9 10 —  —  Non-trade —  68 —  —  Busan Industrial Solar Power Co., Ltd. Trade receivables 2 2 —  —  Bitsolar Energy Co., Ltd. Non-trade 222 1 —  —  Trade payables —  —  201 201 Haemodum Solar Co., Ltd. Trade receivables 1 1 —  —  Yeongam Solar Power Co., Ltd. Trade receivables 44 56 —  —  Trad

Statement of Cash Flows

Statement of Cash Flows	12 Months Ended
	Dec. 31, 2023
Non Cash Transactions [Abstract]
Statement of Cash Flows	48. Statement of Cash Flows (1) Significant non-cash Transactions 2021 2022 2023 In millions of won Transfer from construction-in-progress ￦ 12,902,589 13,723,972 10,090,726 Recognition of asset retirement cost and related provision for decommissioning costs 2,356,805 3,497,866 (292,120 ) Transfer from provision for disposal of spent nuclear fuel to accrued expenses 455,401 417,687 379,011 Transfer from long-term borrowings and debt securities to current portion of long-term borrowings and debt securities 11,109,271 13,838,578 30,454,012 Transfer from inventory to stored nuclear fuel 908,842 738,720 827,279 Transfer of right-of-use 78,213 197,016 261,862 (2) Changes in liabilities incurred from financing activities for the years ended December 31, 2022 and 2023 are as follows: 2022 Non-cash Beginning Cash flows Increase Effect of fluctuations Ending In millions of won Borrowings and debt securities ￦ 80,529,513 39,193,815 —  882,037 120,605,365 Lease liabilities 4,410,503 (562,647 ) 109,019 206,268 4,163,143 ￦  84,940,016 38,631,168 109,019 1,088,305 124,768,508 2023 Non-cash Beginning Cash flows Increase Effect of fluctuations Ending In millions of won Borrowings and debt securities ￦ 120,605,365 12,692,924 —  333,541 133,631,830 Lease liabilities 4,163,143 (574,239 ) 253,495 (34,519 ) 3,807,880 ￦ 124,768,508 12,118,685 253,495 299,022 137,439,710

Commitments for Expenditure

Commitments for Expenditure	12 Months Ended
	Dec. 31, 2023
Commitments for Expenditure [Abstract]
Commitments for Expenditure	49. Commitments for Expenditure (1) The commitments related to acquisition of property, plant and equipment as of December 31, 2022 and 2023 are as follows: 2022 2023 Contracts Commitment Remaining liability balances Commitment Remaining In millions of won Purchase of cable (PVC, 1C, 2000SQ) 153,000M and others (Shin-Bupyung-Youngseo) ￦ 57,203 12,595 57,226 417 Purchase of cable (PVC, 1C, 2500SQ) 103,374M and others (Bukdangjin-Shin-Tangjung) 50,151 37,638 51,796 20,661 Purchase of GIS (362kV, 6300A, 63kA) 23CB – Youngseo S/S 37,168 16,788 37,168 15,109 Purchase of GIS (362kV, 6300A, 63kA) 27CB – Kwangyang S/S 37,744 140 37,744 140 Purchase of cable (PVC, 1C, 2500SQ) 100,548M and others (Kyungin Construction) 58,269 3,883 58,271 746 Purchase of GIS (362kV, 6300A, 63kA) 25CB – Migeum S/S 33,841 25,641 35,136 20,370 Purchase of cable (PVC, 1C, 2000SQ) 5,862M and others (Baekun-Gwangyanghang) 35,949 3,232 35,016 703 Concrete pole (10M, general purpose, 350KGF) 126,948 ea and five other equipments (unit price contract) 202,795 95,428 —  —  Purchase of GIS (362KV, 6300A, 63KA) Type 19 – Shinyangsan S/S 31,834 17,334 32,460 5,635 Purchase of cable (PVC, 1C, 2500SQ) 57,868M and others (Goduk-Seoansung) 40,937 3,748 40,937 654 Purchase of cable (PVC, 1C, 2000SQ) 87,732M and others (Eulwangboonki) 36,155 10,274 36,446 1,015 Purchase of GIS(362KV,6300A,63KA) Type 18 – Wolsung S/Y 32,090 32,090 32,090 26,742 Purchase of cable (FR CNCO-W,1C,325SQ) 31,387 19,213 —  —  Purchase of cable (TR CNCE-W,1C,325SQ) 75,620 40,497 —  —  Purchase of cable (TR CNCE-W,1C,600SQ) 31,851 17,478 —  —  Purchase of cable (TR CNCE-W/AL,1C,400SQ) 53,064 29,436 —  —  System stabilization ESS equipment (Bubuk S/S) Type 1 222,300 222,300 222,300 145,014 System stabilization ESS equipment (Shinnamwon S/S) Type 1 211,500 211,500 211,500 130,169 System stabilization ESS equipment (Yeongcheon S/S) Type 1 73,104 73,104 73,104 18,604 Concrete pole (10M, general purpose, 500KGF) 111,000 ea and four other equipments —  —  67,996 39,971 Advanced EType low voltage electronic watt-hour meter 1,311,552 ea —  —  36,103 —  System stabilization ESS equipment (Yesan S/S) Type 1 —  —  56,403 12,095 System stabilization ESS equipment (Hamyang S/S) Type 1 —  —  35,609 12,870 Construction of Saeul Units (#3,4) 9,800,424 2,455,673 9,800,424 1,113,349 Construction of Shin-Hanul Units (#1,2)(*) 10,327,372 97,889 10,592,760 —  Construction of Shin-Hanul Units (#3,4) 11,007,232 10,858,828 11,680,361 10,935,737 Other 30 contracts 853,941 425,149 1,631,574 1,133,467 Purchase of main machine for Jeju LNG combined 166,287 10,898 166,287 —  Purchase of equipments for the construction project of Boryeong indoor coal storage yard 318,197 287,965 334,932 279,920 Purchase of main machine for Boryeong New Complex Unit 1 —  —  281,600 228,053 Boryeong New Complex Unit 1 Construction Project —  —  186,358 186,358 Service of designing Taean Units (#9,10) 112,909 12,468 112,909 12,468 Purchase of gas turbine and turbine equipment of Gimpo combined heat & power plant 126,302 32,748 123,495 15,603 Purchase of steam turbine, HRSG and POWER BLOCK of Gimpo combined heat & power plant 221,997 38,714 220,864 214 Construction of Gimpo combined heat & power plant 181,798 56,558 211,372 13,960 Purchase of gas turbines, steam turbines, and accessories for Gumi natural gas power plant 197,983 197,983 197,983 193,578 Purchase of heat recovery boiler and accessories for Gumi natural gas power plant —  —  65,918 45,299 2022 2023 Contracts Commitment Remaining liability balances Commitment Remaining In millions of won Construction of Gumi natural gas power plant ￦ 204,094 204,094 210,393 173,350 Installation of natural gas supply facility at Gumi natural gas power plant 70,620 70,620 70,620 61,799 Purchase of coal handling machine for construction of Samcheok Units (#1,2) 299,048 6,687 312,150 5,682 Purchase of main equipment for Namjeju 140,144 3 140,144 3 Purchase of main equipment for Shin-Sejong combined thermal power plant 234,392 32,621 234,392 8,342 Purchase of Hadong thermal power indoor carboniferous plant 162,814 62,299 167,259 48,495 Purchase of phase 2 power generation facility for Yeongwol fuel cells 86,100 30,527 86,350 219 Purchase of fuel cell power generation facilities for the fifth stage of Shinincheon headquarters 81,960 81,960 81,960 18,290 (*) As of December 31, 2023, the commitment amounts include the Shin-Hanul Unit #1, construction of which has completed during the year ended December 31, 2022. In addition, as of December 31, 2023, Shin-hanul Unit #2 is in commissioning. (2) As of December 31, 2023, details of contracts for inventory purchase commitment are as follows: The Company imports all of its uranium ore concentrates from sources outside Korea (including the United States, United Kingdom, Kazakhstan, France, Russia, South Africa, Canada and Australia) which are paid for with currencies other than Won, primarily in U.S. dollars. In order to ensure stable supply, the Company entered into long-term and medium-term contracts with various suppliers, and supplements such supplies with purchases of fuels on spot markets. The long-term and medium-term contract periods vary among contractors and the stages of Type Periods Contracted Concentrate 2023 ~ 2033 21,400 Ton U3O8 Conversion 2023 ~ 2030 16,300 Ton U Enrichment 2023 ~ 2032 18,893 Ton SWU In addition, the contracted quantity of the molded uranium between Korea Hydro & Nuclear Power Co., Ltd. and KEPCO Nuclear Fuel Co., Ltd., which are subsidiaries of the Company, is 1,285 Ton U (contract periods : 2014 ~ 202 6

Contingencies and Commitments

Contingencies and Commitments	12 Months Ended
	Dec. 31, 2023
Contingencies and Commitments [Abstract]
Contingencies and Commitments	50. Contingencies and Commitments (1) Ongoing litigations and claims related with contingent liabilities and contingent assets as of December 31, 2022 and 2023 are as follows: 2022 2023 Number Claim Number Claim In millions of won As the defendant 653 ￦ 981,878 666 ￦ 805,227 As the plaintiff 238 599,809 268 571,593 As of December 31, 2023, there are 3 ongoing litigations and 1 arbitration case between consolidated entities. 1) The Company is the defendant against a number of claims. The following is ongoing claim pertaining to the Company which can potentially be significant: There are multiple ongoing claims against the Company related to ordinary wages, requesting payment of unpaid wages. The Company believes that the possibility of the outflow of economic benefits is probable on the ongoing and the expected lawsuits. Accordingly, the Company recognized ￦39,229 million as litigation provisions in relation to the lawsuit as of December 31, 2023. 2) In addition to the abovementioned significant ongoing claims, there are 15 arbitration cases pertaining to the Company as of December 31, 2023 and the significant arbitration cases for the year ended December 31, 2023 are as follows: i) During the year ended December 31, 2022, the Company filed an arbitration application with Westinghouse Electric Company LLC to Korean Commercial Arbitration Board, requesting to confirm whether the Company is subject to nuclear power plant export control procedures or not. As of the December 31, 2023, the Company has not ii) During the year ended December 31, 2023, the Company filed an arbitration application to Korean Commercial Arbitration Board in relation to the insufficient operation performance of Sinseongnam Substation (345kV) STATCOM (reactive power compensation system for voltage stabilization in metropolitan area), but cannot reasonably estimate whether the inflow of economic benefits is probable as a result of the arbitration. iii) During the year ended December 31, 2023, Hitachi Energy Sweden filed an arbitration against the Company regarding the request for additional payment due to the increase in capacity of some facilities and the withdrawal of liquidated damage in relation to Shin Young-ju not iv) During the year ended December 31, 2023, the Company filed a commercial arbitration to request payment of expenses such as monitoring vessel operating expenses for Jindo-Jeju high-voltage direct current (HVDC) connection project contract, but has not (2) Guarantees of payments and commitments provided to other companies as of December 31, 2023 are as follows: 1) The Company has provided the syndicate of lenders of PT Indo Raya Tenaga, the business corporation of PT Barito Wahana Tenaga, a guarantee by establishing the right of pledge on the shares of PT Barito Wahana Tenaga for project financing of PT Barito Wahana Tenaga as of December 31, 2023. 2) The Company has outstanding borrowings with a limit of USD 264,800 thousand from its creditors such as International Finance Corporation. Regarding the borrowing contract, the Company has guaranteed capital contribution of USD 69,808 thousand and additional contribution up to USD 19,000 thousand for contingencies, if any. In relation to this financial agreement, the Company is providing its entire shares in Mira Power Limited and business-related PP&E as collateral to the lenders. 3) The Company has provided USD 6,085 thousand, equivalent to the shareholdings of PTBS Energy and PT Nusantara Hydro Alam, for third-party joint guarantee to Export-Import Bank of Korea, BNP Paribas and ING Bank, to guarantee the payment of debt related to hydroelectric power business of Tanggamus, Indonesia. 4) The Company has provided USD 5,473 thousand for a debt guarantee to PT. Bank KB Bukopin, to guarantee the payment of debt in relation to hydroelectric power business of Wampu, Indonesia. 5) The Company has provided RBC Community Investments Impact Renewables HoldCo-1, 6) The Company has provided EUR 12,053 thousand for a performance guarantee to Microsoft through Kookmin Bank, to guarantee the implementation of the power plant construction for Guba Buget wind power project in Sweden. 7) The Company has provided Axia Power Holdings B.V. and others a performance guarantee up to USD 54,000 thousand for the implementation of Cirebon thermal power generation project in Indonesia. 8) The Company has provided USD 54,000 thousand for a performance guarantee to PT. Cirebon Electric Power, to guarantee the Cirebon coal-fired power plant operation and maintenance project in Indonesia. 9) The Company has provided USD 3,355 10) The Company has provided PT Perusahaan Listrik Negara a performance guarantee up to IDR 35,588,165 thousand for the implementation of Tanjung Jati power plant operation project in Indonesia. 11) The Company has provided USD 30,000 thousand for a performance guarantee to Morgan Stanley Capital Group Inc., to guarantee the electricity purchase contract in relation to photovoltaic power generation project in USA. 12) The Company has provided Morgan Stanley Renewables Inc. a guarantee up to USD 70,000 thousand for the fulfillment of subscription obligation regarding photovoltaic power generation project in USA. 13) The Company has provided Kookmin Bank a debt guarantee up to USD 40,000 thousand to guarantee Equity Bridge Loan for Concho Valley solar business in the United States. 14) The Company has provided Van Phong Power Company, Ltd. a performance guarantee up to USD 5,000 15) The Company has provided RBC Community Investments Impact Renewables HoldCo-1, LLC a guarantee for up to USD 62,800 thousand for the fulfillment of subscription obligation regarding Concho Valley solar power project in the United States. 16) The Company has provided PT Perusahaan Listrik Negara a performance guarantee up to USD 2,280 thousand for the operation maintenance project in Indonesia siborpa. 17) As of December 31, 2023, Gunsan Land Solar Co., Ltd., a joint venture of the Company, has built and is operating a 99 MW photovoltaic power generation facility in the public water reclamation area in Osikdo-dong, Gunsan-si, Jeollabuk-do. The Company is obligated to ensure that Gunsan Land Solar Co., Ltd. can finance up to 80% of the total project cost with investments from citizen and provide a 7% return on the citizen who invested after the construction period is over according to the Shareholders’ agreement. In addition, when the investment from citizen fails to reach the target percentage of 80% and additional debts are collected for fulfill the target percentage, the Company is obligated to provide Gunsan-si the amount of 7% return on uncollected citizen investments estimated to be collected less the amount of additional debts collected instead. 18) The Company has provided joint guarantee for ￦1,641 million guarantee insurance contracted by Haetbyeotgil Sunlight Co., Ltd. (3) Lines of credit provided by financial institutions as of December 31, 2023 are as follows: Commitments Financial institutions Currency Credit limit Used amount In millions of won and thousands of foreign currencies Commitments on Bank-overdraft Nonghyup Bank and others KRW 2,260,500 3,096 Limit amount available for CP Hana Bank and others KRW 5,650,000 5,650,000 General Loan, etc. Hana Bank and others KRW 4,400,000 4,350,000 Limit amount available for card Hana Bank and others KRW 47,424 1,919 Loan limit Korea Development Bank and others KRW 2,708,395 1,969,529 DBS Bank and others USD 1,782,000 USD 40,000 KRW 200,000 Certification of payment on payables from foreign country Certification of payment on L/C Nonghyup Bank USD 8,700 5,270 Shinhan Bank and others USD 1,160,452 178,558 Kookmin Bank and others EUR 42,688 42,688 Shinhan Bank JPY 481,785 481,785 Certification of Performance guarantee on contract Hana Bank and others KRW 145,855 125,289 First Abu Dhabi Bank and others USD 921,138 788,313 Korea Development Bank and others JPY 620,000 620,000 Hana Bank EUR 12,106 12,106 Hana Bank INR 44,872 44,872 Hana Bank OMR 6,250 6,250 Hana Bank SAR 4,151 4,151 Certification of bidding Hana Bank USD 5,200 —  Export-Import Bank of Korea EUR 10,000 10,000 Advance payment bond, Warranty bond, Retention bond and others Seoul Guarantee Insurance Hana Bank and others KRW USD 57,670 813,839 57,670 763,596 Saudi National Bank SAR 21,000 21,000 Hana Bank and others MXN 21,597 20,027 Others (*) Nonghyup Bank and others KRW 337,126 KRW 19,943 USD 20,832 EUR 282 Nonghyup Bank and others USD 316,327 USD 60,073 EUR 48,825 StandardChartered AED 50 50 Secured loan of credit sales Nonghyup Bank and others KRW 271,000 —  Inclusive credit Hana Bank KRW 8,000 4,920 Hana Bank and others USD 135,000 USD 15,141 INR 345,206 Equity Bridge Loan Guarantee Export-Import Bank of Korea and others USD 1,764,555 1,372,546 Trade finance DBS Bank and others USD 870,000 —  (*) As of December 31, 2023, the Company has entered into a credit extension agreement for derivatives transactions with Nonghyup Bank, Hana Bank, and Woori Bank as ancillary to currency swap transactions. (4) As of December 31, 2023, blank check and assets provided as collaterals or pledges to financial institutions by the Company are follows: Obligor Creditor Assets provided as security Currency Amount Description In millions of won and thousands of foreign currencies Mira Power Limited International Finance Corporation and others Property, plant and equipment and others USD 264,800 Collateral for borrowings(*1) Tamra Offshore Wind Power Co., Ltd. Kyobo Life Insurance Co., Ltd. and others Property, plant and equipment and others KRW 171,600 Collateral for borrowings(*2) Gyeonggi Green Energy Co., Ltd. Korea Development Bank and others Cash and cash equivalents and others KRW 327,080 Collateral for borrowings(*2) Commerce and Industry Energy Co., Ltd. IBK and others Property, plant and equipment and others KRW 110,500 Collateral for borrowings(*2) Jeongam Wind Power Co., Ltd. KDB Capital Corporation and others Cash and cash equivalents and others KRW 230,259 Collateral for borrowings(*2) Gyeongju Wind Power Co., Ltd. Shinhan Bank and others Property, plant and equipment and others KRW 68,400 Collateral for borrowings(*2) Korea Offshore Wind Power Co., Ltd. Woori Bank and others Property, plant and equipment and others KRW 293,400 Collateral for borrowings(*2) Qatrana Electric Power Company The Islamic Development Bank and others Finance lease receivable and property, plant and equipment and others JOD 136,623 Collateral for borrowings(*1) KST Electric Power Company, S.A.P.I. de C.V. Export-Import Bank of Korea and others Finance lease receivable and property, plant and equipment and others USD 401,277 Collateral for debt securities(*1) Incheon Fuel Cell Co., Ltd. Kookmin Bank and others Cash and cash equivalents and others KRW 276,960 Collateral for borrowings(*2) Kyobo Life Insurance Co., Ltd. and others Property, plant and equipment and others KRW 329,736 Collateral for borrowings(*2) KOSPO Youngnam Shinhan Bank and others Cash and cash equivalents and others KRW 744,120 Collateral for borrowings(*2) Jeju Hanlim Offshore Wind Co., Ltd. Kookmin Bank and others Property, plant and equipment and others KRW 1,800 Collateral for borrowings(*2) Western Power Changgi Solar Co., Ltd. Samsung Life Insurance and others Property, plant and equipment and others KRW 58,500 Collateral for borrowings(*2) J Wind First, LLC Woori Bank Trade receivable and others KRW 55,000 Collateral for borrowings (*2) Chitose Solar Power Plant LLC Korea Development Bank Property, plant and equipment and others USD 134,289 Collateral for borrowings(*1) Mangilao Intermediate Holdings LLC Mizuho Bank Trade receivable and others USD 93,392 Collateral for borrowings(*1) (4) As of December 31, 2023, blank check and assets provided as collaterals or pledges to financial institutions by the Company are follows, continued: (*1) This is based on the amount of loan commitment limit. (*2) As of December 31, 2023, the Company has established guarantees for pledge for transfer of rights of long-term borrowings, pledge for insurance claims, pledge for shares, etc. The Company has ￦1,197 million of project loans from the Korea Energy Agency as of December 31, 2023. The Company has provided a promissory note as a repayment guarantee. (5) The Company temporarily suspended operations of the Gangneung hydroelectric generating plant, with a carrying amount of ￦62,871 million as of September December 31, 2023, to improve the quality of water used in generating electricity. The expenses related to the suspension of operations of ￦1,494 million and depreciation on the idle assets of ￦3,683 million are recorded in other expenses for the year ended December 31, 2023. Regarding the improvement of water quality, the results of damages compensation for the local residents cannot be reasonably estimated, and the Company is in negotiations with Gangneung City and related stakeholders to restart the Gangneung hydroelectric generating plant as of December 31, 2023. (6) As the government of the Republic of Korea announced the suspension of operation in Gaeseong Industrial District, it is uncertain if the Company can exercise the property rights for the Company’s facility in Gaeseong Industrial District as of December 31, 2023. The book value of facility is ￦12,123 million and trade receivables related to the companies residing in Gaeseong Industrial District have been fully written-off. (7) As of December 31, 2023, the Company owns land at 6171-1 Nuri-ri, 64,371 (8) The Korea Institute of Energy Technology(KENTECH) was established in April, 2020, in accordance with the “Basic plan for the establishment of KENTECH (July, 2019)”. By the special law to create KENTECH, the Company, government, and local government may contribute to the fund. The Company will decide whether to contribute to the fund on a board resolution after consulting with relevant organizations considering its financial situation by year. (9) The ongoing armed conflict in Ukraine started in February 2022 and relevant sanctions against Russia imposed by the international community can impact not only sanctioned entities but also the entities doing business directly or indirectly with Ukraine or Russia and the entities exposed directly or indirectly to industries or economy of Russia or Ukraine. The Company cannot make reasonable estimation of the financial impact of the recent conflict in Ukraine on the future events.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2023
Disclosure of non-adjusting events after reporting period [abstract]
Subsequent Events	51. Subsequent Events (1) Subsequent to December 31, 2023, KEPCO and KEPCO Nuclear Fuel Co., Ltd., a subsidiary of the Company Company Type Interest Type Interest rate (%) Borrowing Maturity Amount In millions of won Korea Electric Power Corporation Long-term borrowing (Mid- Floating 3M CD+0.49 2024.02.21 2029.02.21 ￦ 200,000 Long-term borrowing (Mid- Floating 3M CD+0.50 2024.02.28 2029.02.28 200,000 Long-term borrowing (Mid- to long-term CP) (*) Floating 3M CD+0.34 2024.04.05 2027.04.05 250,000 Long-term borrowing (Mid- to long-term CP) (*) Floating 3M CD+0.48 2024.04.11 2027.04.09 250,000 KEPCO Nuclear Fuel Co., Ltd. Long-term borrowings Floating 3M Bank 2024.01.04 2026.12.28 10,000 (*) The maturity of mid- (2) Subsequent to December 31, 2023, KEPCO and its subsidiaries Korea Hydro & Nuclear Power Co., Ltd., Korea Western Power Co., Ltd. and Korea Southern Power Co., Ltd. issued bonds denominated in Korean won and foreign currency for debt repayment and facility funding and details related thereto are as follows: In millions of won and thousands of USD Company Type Issue date Maturity Interest rate (%) Amount Korea Electric Power Corporation FY24 Global 15th 2024.01.31 2027.01.31 4.88 USD 1,200,000 Korea Hydro & Nuclear Power Co., Ltd. #77-1 Corporate bond 2024.03.05 2029.03.05 5yr KTB rate+0.35 ￦ 150,000 #77-2 Corporate bond 2024.03.05 2034.03.05 10yr KTB rate+0.41 100,000 #77-3 Corporate bond 2024.03.05 2044.03.05 20yr KTB rate+0.40 60,000 #78-1 Corporate bond 2024.03.25 2029.03.25 3.62 100,000 #78-2 Corporate bond 2024.03.25 2034.03.25 3.74 90,000 #78-3 Corporate bond 2024.03.25 2044.03.25 3.72 100,000 Korea Western Power Co., Ltd. #60-1 Corporate bond 2024.01.16 2026.01.16 3.67 150,000 #60-2 Corporate bond 2024.01.16 2029.01.16 3.73 50,000 #60-3 Corporate bond 2024.01.16 2044.01.16 3.74 20,000 #61-1 Corporate bond 2024.01.25 2025.01.24 3.54 100,000 #61-2 Corporate bond 2024.01.25 2027.01.25 3.73 40,000 #61-3 Corporate bond 2024.01.25 2044.01.25 3.82 10,000 Korea Southern Power Co., Ltd. #72-1 Corporate bond 2024.01.11 2027.01.11 3.70 70,000 #72-2 Corporate bond 2024.01.11 2029.01.11 3.79 30,000 Korea East-West Power Co., Ltd. #47-1 Corporate bond 2024.04.08 2027.04.08 3.62 30,000 #47-2 Corporate bond 2024.04.08 2029.04.06 3.67 50,000 (3) KEPCO KDN Co., Ltd., a subsidiary of the Company, sold all of its shares in the associate YTN Co., Ltd. ( 21.43 221,490 (4) On February 23, 2024, the board of directors of KEPCO decided to contribute ￦ 76,600 Korea

Basis of Preparation (Policies)

Basis of Preparation (Policies)	12 Months Ended
	Dec. 31, 2023
Basis of Preparation [Abstract]
Statement of compliance	(1) Statement of compliance These consolidated financial statements have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB).
Basis of measurement	(2) Basis of measurement These consolidated financial statements have been prepared on the historical cost basis, except for the following material items in the consolidated statements o • financial assets at fair value through profit or loss; • financial assets at fair value through other comprehensive income or loss; • derivative financial instruments are measured at fair value; or • liabilities for defined benefit plans are recognized at the net of the total present value of defined benefit obligations less the fair value of plan assets.
Functional and presentation currency	(3) Functional and presentation currency These consolidated financial statements are presented in Korean won (presented as “￦”, “won” or “KRW”), which is also the functional currency of KEPCO and most of the significant operating subsidiaries.
Use of estimates and judgments	(4) Use of estimates and judgments The preparation of the consolidated financial statements in conformity with IFRS requires management to make judgments, estimates and assumptions that affect the application of accounting policies and the reported amounts of assets, liabilities, income and expenses. Actual results may differ from these estimates. Estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected. Meanwhile, the Company considers climate-related matters in estimates and assumptions, where appropriate. This assessment includes a wide range of possible impacts on the group due to both physical and transition risks. Even though the Company believes its business model and products will still be viable after the transition to a low-carbon economy, climate-related matters increase the uncertainty in estimates and assumptions underpinning several items in the financial statements. Even though climate-related risks might not currently have a significant impact on measurement, the Company is closely monitoring relevant changes and developments, such as new climate-related legislation. The followings are the key assumptions and other key sources of estimation uncertainty at the end of the reporting period, that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year. (i) Useful lives of property, plant and equipment, intangible assets other than goodwill and estimations on provision for decommissioning costs The Company reviews the estimated useful lives of property, plant and equipment at the end of each annual reporting period. Management’s assumptions could affect the determination of estimated economic useful lives. The Company records the fair value of estimated decommissioning costs as a liability in the period in which the Company incurs a legal obligation associated with the retirement of long-lived assets that result from acquisition, construction, development and/or normal use of the assets. The Company is required to record a liability for the dismantling (demolition) of nuclear power plants and disposal of spent fuel and low and intermediate radioactive wastes. The measurement of such liability is subject to change based on change in estimated cash flow, inflation rate, discount rate, and expected timing of decommissioning. (ii) Deferred tax The Company recognizes deferred tax assets and liabilities based on the differences between the financial statement carrying amounts and the tax bases of assets and liabilities of each consolidated taxpaying entity. However, the amount of deferred tax assets may be different if the Company determines the estimated future taxable income is not sufficient to realize the deferred tax assets recognized. (iii) Valuations of financial instruments at fair values The Company’s accounting policies and disclosures require the measurement of fair values, for both financial and non-financial If third party information, such as broker quotes or pricing services, is used to measure fair values, then the valuation team assesses the evidence obtained from the third parties to support the conclusion that such valuations meet the requirements of IFRS including the level in the fair value hierarchy in which such valuation techniques should be classified. When measuring the fair value of an asset or a liability, the Company uses market observable data as far as possible. Fair values are categorized into different levels in a fair value hierarchy based on the inputs used in the valuation techniques as follows. If the inputs used to measure the fair value of an asset or a liability might be categorized in different levels of the fair value hierarchy, then the fair value measurement is categorized in its entirety in the same level of the fair value hierarchy as the lowest level input that is significant to the entire measurement. The Company recognizes transfers between levels of the fair value hierarchy at the end of the reporting period during which the change has occurred. (iv) Defined employee benefit liabilities The Company offers its employees defined benefit plans. The cost of providing benefits is determined using the Projected Unit Credit Method, with actuarial valuations being carried out at the end of each reporting period. For actuarial valuations, certain inputs such as discount rates and future salary increases are estimated. Defined benefit plans contain significant uncertainties in estimations due to its long-term nature (refer to Note 25). (v) Unbilled revenue Electricity delivered but neither metered nor billed is estimated at the reporting date based on the volume of electricity delivered which can vary significantly as a result of customer usage patterns, customer mix, meter reading schedules, weather, and etc. Unbilled revenue recognized as of December 31, 2022 and 2023 are ￦2,348,813 million and ￦2,504,479 million, respectively. (vi) Construction contracts The Company recognizes revenue over time using the cost-based input method which represents a faithful depiction of the Company’s progress towards complete satisfaction of providing the power plant construction, which has been identified as a single performance obligation. In applying the cost-based input method, it is necessary to use estimates and assumptions related to the Company’s efforts or inputs expected to be incurred. Costs incurred towards contract completion include costs associated with direct materials, labor, and other indirect costs related to contract performance. Judgment is required in estimating the costs expected to incur in completing the construction projects which involves estimating future materials, labor, contingencies and other related costs. Revenue is estimated based on the contractual amount; however, it can also be affected by uncertainties resulting from unexpected future events. Information about critical judgments in applying accounting policies that have the most significant effect on the amounts recognized in the consolidated financial statements is included in the following notes: • Note 17 – Investments in Associates and Joint Ventures • Note 18 – Property, Plant and Equipment • Note 20 – Construction Contracts • Note 45 – Risk Management Information about assumptions and estimation uncertainties that have a significant risk of resulting in a material adjustment within the next financial year is included in the following notes: • Note 25 – Employment Benefits • Note 41 – Income Taxes
Changes in accounting policies	(5) Changes in accounting policies Changes in accounting standards effective from January 1, 2023 are as follows. The Company believes that these amendments have no significant impact on the Company’s consolidated financial statements. The Company has not early adopted any other standards, interpretations or amendments that has been issued but is not yet effective. Amendments to IFRS 17—‘Insurance Contracts’ The amendments provide a comprehensive new accounting standard for insurance contracts covering recognition and measurement, presentation and disclosure. IFRS 17 replaces IFRS 4 ‘Insurance Contracts’. IFRS 17 applies to all types of insurance contracts (i.e., life, non-life, re-insurance), • a specific adaptation for contracts with direct participation features (the variable fee approach); and • a simplified approach (the premium allocation approach) mainly for short-duration contracts. Amendments to IAS 8—‘Definition of Accounting Estimates’ The amendments to IAS 8 clarify the distinction between changes in accounting estimates, and changes in accounting policies and the correction of errors. They also clarify how entities use measurement techniques and inputs to develop accounting estimates. Amendments to IAS 1—‘Disclosure of Accounting Policies’ The amendments to IAS 1 provide guidance and examples to help entities apply materiality judgements to accounting policy disclosures. The amendments aim to help entities provide accounting policy disclosures that are more useful by replacing the requirement for entities to disclose their ‘significant’ accounting policies with a requirement to disclose their ‘material’ accounting policies and adding guidance on how entities apply the concept of materiality in making decisions about accounting policy disclosures. Amendments to IAS 12—‘Deferred Tax related to Assets and Liabilities arising from a Single Transaction’ The amendments IAS 12 ‘Income Taxes’ narrow the scope of the initial recognition exception, so that it no longer applies to transactions that give rise to equal taxable and deductible temporary differences such as leases and decommissioning liabilities. Amendments to IAS 12—‘International Tax Reform : Pillar Two Model Rules’ The amendments to IAS 12 have been introduced in response to the OECD’s BEPS Pillar Two Model Rules and include: • a mandatory temporary exception to the recognition and disclosure of deferred taxes arising from the jurisdictional implementation of the Pillar Two Model Rules; and • disclosure requirements for affected entities to help users of the financial statements better understand an entity’s exposure to Pillar Two income taxes arising from that legislation, particularly before its effective date. The mandatory temporary exception—the use of which is required to be disclosed—applies immediately. The remaining disclosure requirements apply for annual reporting periods beginning on or after January 1, 2023, but not for any interim periods ending on or before December 31, 2023. The Company has applied the mandatory exception to recognizing and disclosing information about deferred tax assets and liabilities arising from Pillar Two income taxes. Since the Pillar Two Model Rules legislation shall be effective from January 1, 2024, the Company has not recognized any Pillar Two income taxes for the year ended December 31, 2023. The impact of Pillar Two Model Rules is described in Note 41. (8).

Material Accounting Policies (P

Material Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2023
Disclosure Of Material Accounting Policies [Abstract]
Basis of consolidation	(1) Basis of consolidation The consolidated financial statements are the financial statements of the Company in which the assets, liabilities, equity, income, expenses and cash flows of KEPCO and its subsidiaries are presented as those of a single economic entity. Subsidiaries are those entities controlled by the Company. The Company controls an entity when it is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. Income and expense of a subsidiary acquired or disposed of during the year are included in the consolidated statement of comprehensive income or loss from the effective date of acquisition and up to the effective date of disposal, as appropriate. Total comprehensive income of subsidiaries is attributed to the owners of the Company and to the non-controlling non-controlling When necessary, adjustments are made to the financial statements of subsidiaries to bring their accounting policies in line with those of the Company. All intra-company assets and liabilities, equity, income, expenses and cash flows relating to transactions between entities within the Company are eliminated in full on consolidation. Changes in the Company’s ownership interests in a subsidiary that do not result in the Company losing control over the subsidiary are accounted for as equity transactions. The carrying amounts of the Company’s interests and the non-controlling non-controlling When the Company loses control of a subsidiary, the income or loss on disposal is calculated as the difference between (i) the aggregate of the fair value of the consideration received and the fair value of any retained interest and (ii) the previous carrying amount of the assets (including goodwill), and liabilities of the subsidiary and any non-controlling
Business combinations	(2) Business combinations A business combination is accounted for by applying the acquisition method, unless it is a combination involving entities or businesses under common control. The consideration transferred in a business combination is measured at fair value, which is calculated as the sum of the acquisition-date fair values of the assets transferred by the Company, liabilities incurred by the Company to the former owners of the acquiree and the equity interests issued by the Company in exchange for control of the acquiree. Acquisition-related costs are generally recognized in profit or loss as incurred. At the acquisition date, the identifiable assets acquired and the liabilities assumed are recognized at their fair value at the acquisition date, except that: • deferred tax assets or liabilities and liabilities or assets related to employee benefit arrangements are recognized and measured in accordance with IAS 12 ‘Income Taxes’ and IAS 19 ‘Employee Benefits’ respectively; • assets (or disposal groups) that are classified as held for sale in accordance with IFRS 5 ‘Non-current Goodwill is measured as the excess of the sum of the consideration transferred, the amount of any non-controlling non-controlling Non-controlling non-controlling recognized amounts of the acquiree’s identifiable net assets. The choice of measurement can be elected on a transaction-by-transaction non-controlling When the consideration transferred by the Company in a business combination includes assets or liabilities resulting from a contingent consideration arrangement, the contingent consideration is measured at its acquisition-date fair value and included as part of the consideration transferred in a business combination. Changes in the fair value of the contingent consideration that qualify as measurement period adjustments are adjusted retrospectively, with corresponding adjustments against goodwill. Measurement period adjustments are adjustments that arise from additional information obtained during the ‘measurement period’ (which cannot exceed one year from the acquisition date) about facts and circumstances that existed at the acquisition date. The subsequent accounting for changes in the fair value of the contingent consideration that do not qualify as measurement period adjustments depends on how the contingent consideration is classified. Contingent consideration that is classified as equity is not re-measured re-measured When a business combination is achieved in stages, the Company’s previously held equity interest in the acquiree is re-measured If the initial accounting for a business combination is incomplete by the end of the reporting period in which the combination occurs, the Company reports provisional amounts for the items for which the accounting is incomplete. Those provisional amounts are adjusted during the measurement period (see above), or additional assets or liabilities are recognized, to reflect new information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the amounts recognized at that date. The assets and liabilities acquired under business combinations under common control are recognized at the carrying amounts recognized previously in the consolidated financial statements of the ultimate parent. The difference between consideration transferred and carrying amounts of net assets acquired is recognized as part of share premium.
Investments in associates	(3) Investments in associates An associate is an entity over which the Company has significant influence and that is neither a subsidiary nor an interest in a joint venture. Significant influence is the power to participate in the financial and operating policy decisions of the investee but does not control or joint control over those policies. If the Company holds 20% ~ 50% of the voting power of the investee, it is presumed that the Company has significant influence over the investee. The results and assets and liabilities of associates are incorporated in these consolidated financial statements using the equity method of accounting. If the investment is classified as held for sale, in which case it is accounted for in accordance with IFRS 5 ‘Non-current Under the equity method, an investment in an associate is initially recognized in the consolidated statement of financial position at cost and adjusted thereafter to recognize the Company’s share of the profit or loss and other comprehensive income of the associate. When the Company’s share of losses of an associate exceeds the Company’s interest in that associate (which includes any long-term interests that, in substance, form part of the Company’s net investment in the associate), the Company discontinues recognizing its share of further losses. Additional losses are recognized only to the extent that the Company has incurred legal or constructive obligations or made payments on behalf of the associate. Any excess of the cost of acquisition over the Company’s share of the net fair value of the identifiable assets, liabilities and contingent liabilities of an associate recognized at the date of acquisition is recognized as goodwill, which is included within the carrying amount of the investment. Any excess of the Company’s share of the net fair value of the identifiable assets, liabilities and contingent liabilities over the cost of acquisition, after reassessment, is recognized immediately in profit or loss. Upon disposal of an associate that results in the Company losing significant influence over that associate, any retained investment is measured at fair value at that date and the fair value is regarded as its fair value on initial recognition as a financial asset in accordance with IFRS 9. The difference between the previous carrying amount of the associate attributable to the retained interest and its fair value is included in the determination of the gain or loss on disposal of the associate. In addition, the Company accounts for all amounts previously recognized in other comprehensive income in relation to that associate on the same basis as would be required if that associate had directly disposed of the related assets or liabilities. Therefore, if a gain or loss previously recognized in other comprehensive income by that associate would be reclassified to profit or loss on the disposal of the related assets or liabilities, the Company reclassifies the gain or loss from equity to profit or loss (as a reclassification adjustment) when it loses significant influence over that associate. The requirements of IAS 28’ Investments in Associates and Joint Ventures’ are applied to determine whether it is necessary to recognize any impairment loss with respect to the Company’s investment in an associate. When necessary, the entire carrying amount of the investment (including goodwill) is tested for impairment in accordance with IAS 36 ‘Impairment of Assets’ as a single asset by comparing its recoverable amount (higher of value in use and fair value less costs to sell) with its carrying amount, any impairment loss recognized forms part of the carrying amount of the investment. Any reversal of that impairment loss is recognized in accordance with IAS 36 to the extent that the recoverable amount of the investment subsequently increases. When the Company transacts with its associate, incomes and losses resulting from the transactions with the associate are recognized in the Company’s consolidated financial statements only to the extent of interests in the associate that are not related to the Company.
Joint arrangements	(4) Joint arrangements A joint arrangement is an arrangement of which two or more parties have joint control. Joint control is the contractually agreed sharing of control of an arrangement, which exists only when decisions about the relevant activities require the unanimous consent of the parties sharing control. Joint arrangements are classified into two types - joint operations and joint ventures. A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement (i.e., joint operators) have rights to the assets, and obligations for the liabilities, relating to the arrangement. A joint venture is a joint arrangement whereby the parties that have joint control of the arrangement (i.e., joint ventures) have rights to the net assets of the arrangement. The classification of a joint arrangement as a joint operation or a joint venture depends upon the rights and obligations of the parties to the arrangement. The Company determines the type of joint arrangement in which it is involved by considering the structure and form of the arrangement, the terms agreed by the parties in the contractual arrangement and other facts and circumstances. If the joint arrangement is a joint operation, the Company is to recognize and measure the assets and liabilities (and recognize the related revenues and expenses) in relation to its interest in the arrangement in accordance with relevant IFRSs applicable to the particular assets, liabilities, revenues and expenses. If the joint arrangement is a joint venture, the Company is to account for that investment using the equity method accounting in accordance with IAS 28 ‘Investment in Associates and Joint Ventures’ (refer to Note 3.(3)), except when the Company is applicable to the IFRS 5 ‘Non-current
Non-current assets held for sale	(5) Non-current Non-current non-current When the Company is committed to a sale plan involving loss of control of a subsidiary, all of the assets and liabilities of that subsidiary are classified as held for sale when the criteria described above are met, regardless of whether the Company will retain a non-controlling Non-current
Goodwill	(6) Goodwill The Company measures goodwill which acquired in a business combination at the amount recognized at the date on which it obtains control of the acquiree (acquisition date) less any accumulated impairment losses. Goodwill acquired in a business combination is allocated to each cash-generating unit (CGU) that is expected to benefit from the synergies arising from the business acquired. The Company assesses at the end of each reporting period and whenever there is an indication that the asset may be impaired. An impairment loss is recognized if the carrying amount of an asset or a CGU exceeds its recoverable amount. Impairment losses are recognized in profit or loss. Any impairment identified at the CGU level will first reduce the carrying value of goodwill and then be used to reduce the carrying amount of the other assets in the CGU on a pro rata basis. Except for impairment losses in respect of goodwill which are never reversed, an impairment loss is reversed if there has been a change in the estimates used to determine the recoverable amount. An impairment loss is reversed only to the extent that the asset’s carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized. On disposal of the relevant CGU, the amount of goodwill is included in the determination of the gain or loss on disposal.
Revenue from Contracts with Customers	(7) Revenue from Contracts with Customers The Company recognizes revenue by applying the five-step approach (Step 1: Identify the contract(s) with a customer, Step 2: Identify the performance obligations in the contract, Step 3: Determine the transaction price, Step 4: Allocate the transaction price to the performance obligations in the contract, Step 5: Recognize revenue when the entity satisfied a performance obligation). The Company recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, excluding amounts collected on behalf of third parties. Also, the Company recognizes revenue when the Company satisfies a performance obligation by transferring a promised good or service to a customer. (i) Sale of goods The Company sells electricity to customers and accounts for the generation, transmission and distribution of electricity together as a single performance obligation. The sale of electricity is recognized at a point in time when electricity has been distributed to the customer. The transaction price includes variable consideration due to the progressive electricity billing system, discounts on electricity bills for government policy purposes and penalties. In situations where electricity had been delivered but not yet billed, the Company also estimates the volume of electricity delivered which can vary significantly as a result of customer usage patterns, customer mix, meter reading schedules, weather, etc. Variable consideration is estimated by using the expected value method which predicts the amount of consideration to which the Company will be entitled and is recognized only to the extent that it is highly probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved which is when the customer is billed. (ii) Sale of construction services The Company provides power plant construction and EPC services which are each identified as a single performance obligation and is recognized over time on the estimated progress to completion using the cost-based input method. The Company believes using the cost-based input method represents a faithful depiction of the transfer of services to the customer. Cost incurred towards contract completion include costs associated with direct materials, labor, and other indirect costs related to contract performance. Judgment is required in estimating the costs expected to incur in completing the construction projects which involves estimating future materials, labor, contingencies and other related costs. Revenue is estimated based on the contractual amount; however it can also be affected by uncertainties resulting from unexpected future events. Revenue may be recognized in advance of billing the customer which results in the recording of a contract asset. Once the Company meets the billing criteria and its rights to consideration become unconditional, the contract asset is then transferred to trade receivable. Billing requirements are generally structured around the completion of certain construction milestones. On some instances, contract liability is recognized when the Company receives consideration before being able to recognize revenue. Once revenue recognition conditions are met, the contract liability is subsequently released to revenue. (iii) Sale of services The Company develops electric power resources including the provision of power generation byproducts and O&M services which are accounted for as a separate performance obligation under each contract. The Company recognizes revenue over time when customers consume the benefits provided by the Company under the terms of the service agreement. (iv) Adoption of the cost pass-through tariff system The Company amended the basic supply terms and conditions with the approval of the Ministry of Trade, Industry and Energy (MOTIE) on December 17, 2020. The cost pass-through tariff system has been applied to the electricity rate after January 1, 2021 in accordance with the amendment. The Company expects the adoption of the new system would not affect the existing accounting policies including ‘revenue from contracts with customers’.
Deferred Revenue	(8) Deferred Revenue The Company receives consideration in the form of an item of property, equipment or cash for constructing or acquiring an item of property or equipment in non-current non-financial
Leases	(9) Leases The lessee and the lessor account for each lease component separately from non-lease However non-lease non-lease (i) The Company as a lessor In the case of finance leases, the Company recognizes the same amount of the net investment in the lease as finance lease receivables and recognizes interest income using the effective interest rate method. Income from operating leases is recognized using the straight-line basis over the lease term, and lease opening direct costs incurred during the negotiation and contract phase of the operating lease contract are added to the carrying amount of the lease asset and recognized as expenses over the lease term on a straight-line basis. (ii) The Company as a lessee (a) Right-of-use The Company recognizes right-of-use Right-of-use re-measurement right-of-use made at or before the commencement date less any lease incentives received. Unless the Company is reasonably certain to obtain ownership of the leased asset at the end of the lease term, the recognized right-of-use Right-of-use (b) Lease liabilities At the commencement date of the lease, the Company recognizes lease liabilities measured at the present value of lease payments to be made over the lease term. The lease payments include fixed payments (including in-substance In calculating the present value of lease payments, the Company uses its incremental borrowing rate at the lease commencement date if the interest rate implicit in the lease is not readily determinable. After the commencement date, the amount of lease liabilities is increased to reflect the accretion of interest and reduced for the lease payments made. In addition, the carrying amount of lease liabilities is remeasured if there is a modification, a change in the lease term, a change in the in-substance (c) Short-term leases and leases of low-value The Company applies the short-term leases recognition exemption to its short-term leases of machinery and equipment (i.e., those leases that have a lease term of 12 months or less from the commencement date and do not contain a purchase option). It also applies the leases of low-value low-value Book value and changes in book value of right-of-use
Foreign currencies	(10) Foreign currencies Transactions in foreign currencies are translated to the respective functional currencies of the Company entities at exchange rates at the dates of the transactions. Monetary items in foreign currencies are retranslated to the functional currency using the reporting date’s exchange rate. Non-monetary Exchange differences are recognized in profit or loss in the period in which they arise except for: • Exchange differences on foreign currency borrowings relating to assets under construction for future productive use, which are included in the cost of those assets when they are regarded as an adjustment to interest costs on those foreign currency borrowings; • Exchange differences on transactions entered into in order to hedge certain foreign currency risks (refer to note 3.(24) • Derivative financial instruments, including hedge accounting); and • Exchange differences on monetary items receivable from or payable to a foreign operation for which settlement is neither planned nor likely to occur (therefore forming part of the net investment in the foreign operation), which are recognized initially in other comprehensive income and reclassified from equity to profit or loss on disposal or partial disposal of the net investment. For the purpose of presenting financial statements, the assets and liabilities of the Company’s foreign operations are expressed in Korean won using exchange rates prevailing at the end of the reporting period. Income and expense items are translated at the average exchange rates for the period, unless exchange rates fluctuated significantly during that period, in which case the exchange rates at the dates of the transactions are used. Exchange differences arising, if any, are recognized in other comprehensive income and accumulated in equity (if applicable, in non-controlling On the disposal of a foreign operation, the cumulative amount of the exchange differences relating to that foreign operation that have been attributed to the controlling interests shall be reclassified from equity to profit or loss (as a reclassification adjustment). The cumulative amount of the exchange differences relating to that foreign operation that have been attributed to the non-controlling On the partial disposal of a subsidiary that includes a foreign operation, the entity shall re-attribute non-controlling Any goodwill arising on the acquisition of a foreign operation and any fair value adjustments to the carrying amounts of assets and liabilities arising on the acquisition of that foreign operation shall be treated as assets and liabilities of the foreign operation. Thus they shall be expressed in the functional currency of the foreign operation and shall be translated at the closing rate. Such exchange differences shall be recognized in equity.
Borrowing costs	(11) Borrowing costs The Company capitalizes borrowing costs directly attributable to the acquisition, construction or production of a qualifying asset as part of the cost of that asset. Other borrowing costs are recognized in expense as incurred. A qualifying asset is an asset that requires a substantial period of time to get ready for its intended use or sale. Investment income earned on the temporary investment of specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. All other borrowing costs are recognized in profit or loss in the period in which they are incurred.
Government grants	(12) Government grants Government grants are not recognized unless there is reasonable assurance that the Company will comply with the grant’s conditions and that the grant will be received. Benefit from a government loan at a below-market interest rate is treated as a government grant, measured as the difference between proceeds received and the fair value of the loan based on prevailing market interest rates. (i) If the Company received grants related to assets, government grants whose primary condition is that the Company purchases, constructs or otherwise acquires long-term assets are deducted in calculating the carrying amount of the asset. The grant is recognized in profit or loss over the life of a depreciable asset as a reduced depreciation expense. (ii) If the Company received grants related to expenses, government grants which are intended to compensate the Company for expenses incurred are recognized as other income (government grants) in profit or loss over the periods in which the Company recognizes the related costs as expenses.
Employee benefits	(13) Employee benefits When an employee has rendered service to the Company during a period, the Company recognizes the contribution payable to a defined contribution plan in exchange for that service as a liability (accrued expense). For defined benefit pension plans and other post-employment benefits, the net periodic pension expense is actuarially determined by “Pension Actuarial System” developed by independent actuaries using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity approximating the terms of the related pension liability. However, if there is not a deep market, market yields on government bonds are used. Net defined benefit liability’s measurement is composed of actuarial gains and losses, return on plan assets excluding net interest on net defined benefit liability, and any change in the effect of the asset ceiling, excluding net interest, which are immediately recognized in other comprehensive income. The actuarial gains or losses recognized in other comprehensive income which will not be reclassified into net profit or loss for later periods are immediately recognized in retained earnings. Past service cost will be recognized as expenses upon the earlier of the date of change or reduction to the plan, or the date of recognizing termination benefits. The retirement benefit obligation recognized in the consolidated statement of financial position represents the present value of the defined benefit obligation as adjusted for unrecognized actuarial gains and losses and unrecognized past service cost, and as reduced by the fair value of plan assets. Any asset resulting from this calculation is limited to unrecognized actuarial losses and past service cost, plus the present value of available refunds and reductions in future contributions to the plan.
Income taxes	(14) Income taxes Income tax expense comprises current and deferred tax. Current tax and deferred tax are recognized in profit or loss except to the extent that it relates to a business combination, or items recognized directly in equity or in other comprehensive income. (i) Current tax Current tax is the expected tax payable or receivable on the taxable profit or loss for the year, using tax rates enacted or substantively enacted at the end of the reporting period and any adjustment to tax payable in respect of previous years. The taxable profit is different from the accounting profit for the period since the taxable profit is calculated excluding the temporary differences, which will be taxable or deductible in determining taxable profit (tax loss) of future periods, and non-taxable non-deductible Current tax assets and liabilities are offset only if, the Company (a) has a legally enforceable right to set off the recognized amounts; and (b) intends either to settle on a net basis, or to realize the asset and settle the liability simultaneously. (ii) Deferred tax Deferred tax is recognized, using the asset-liability method, in respect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. A deferred tax liability is recognized for all taxable temporary differences. A deferred tax asset is recognized for all deductible temporary differences to the extent that it is probable that taxable profit will be available against which they can be utilized. However, deferred tax is not recognized for the following temporary differences: taxable temporary differences arising on the initial recognition of goodwill, or the initial recognition of assets or liabilities in a transaction that is not a business combination and that affects neither accounting profit or loss nor taxable income. In certain circumstances such as when accounting for leases or decommissioning costs of nuclear power plants, the carrying amount of the asset recorded is equal to the liability recognized at initial recognition. When recording its deferred tax balances, the Company considers these assets and liabilities separately on a gross basis. Accordingly, the taxable temporary difference relating to the asset and the deductible temporary difference relating to the liability are separately recognized and presented on a net basis in the consolidated financial statements. The measurement of deferred tax liabilities and deferred tax assets reflects the tax consequences that would follow from the manner in which the Company expects, at the end of the reporting period, to recover or settle the carrying amount of its assets and liabilities. Deferred tax assets or deferred tax liabilities on investment properties measured at fair value, unless any contrary evidence exists, are measured using the assumption that the carrying amount of the property will be recovered entirely through sale. The Company recognizes a deferred tax liability for all taxable temporary differences associated with investments in subsidiaries, associates, and interests in joint ventures, except to the extent that the Company is able to control the timing of the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future. The Company recognizes a deferred tax asset for all deductible temporary differences arising from investments in subsidiaries and associates, to the extent that it is probable that the temporary difference will reverse in the foreseeable future and taxable profit will be available against which the temporary difference can be utilized. The carrying amount of a deferred tax asset is reviewed at the end of each reporting period and reduces the carrying amount to the extent that it is no longer probable that sufficient taxable profit will be available to allow the benefit of part or all of that deferred tax asset to be utilized. Deferred tax assets and liabilities are measured at the tax rates that are expected to apply to the period when the asset is realized or the liability is settled, based on tax rates (and tax laws) that have been enacted or substantively enacted by the end of the reporting period. The measurement of deferred tax liabilities and deferred tax assets reflects the tax consequences that would follow from the manner in which the Company expects, at the end of the reporting period to recover or settle the carrying amount of its assets and liabilities. Deferred tax assets and liabilities are offset only if there is a legally enforceable right to offset the related current tax liabilities and assets, and they relate to income taxes levied by the same tax authority and they intend to settle current tax liabilities and assets on a net basis. (iii) Current and deferred tax for the year Current and deferred tax are recognized in profit or loss, except when they relate to items that are recognized in other comprehensive income or directly in equity, in which case, the current and deferred tax are also recognized in other comprehensive income or directly in equity respectively. Where current tax or deferred tax arises from the initial accounting for a business combination, the tax effect is included in the accounting for the business combination.
Property, plant and equipment	(15) Property, plant and equipment Property, plant and equipment are initially measured at cost and after initial recognition, are carried at cost less accumulated depreciation and accumulated impairment losses. The cost of property, plant and equipment includes expenditures arising directly from the construction or acquisition of the asset, any costs directly attributable to bringing the asset to the location and condition necessary for it to be capable of operating in the manner intended by management and the initial estimate of the costs of dismantling and removing the item and restoring the site on which it is located. Subsequent costs are recognized in the carrying amount of property, plant and equipment at cost or, if appropriate, as separate items if it is probable that future economic benefits associated with the item will flow to the Company and the cost of the item can be measured reliably. The carrying amount of the replaced part is derecognized. The costs of the day-to-day Property, plant and equipment, except for land, are depreciated on a straight-line basis over estimated useful lives that appropriately reflect the pattern in which the asset’s future economic benefits are expected to be consumed. For loaded nuclear fuel related to long-term raw materials and spent nuclear fuels related to asset retirement costs, the Company uses the unit-of-production The estimated useful lives of the Company’s property, plant and equipment are as follows: Useful lives (years) Buildings 8 ~ 40 Structures 5 ~ 50 Machinery 2 ~ 32 Vehicles 3 ~ 8 Loaded heavy water 30 Asset retirement costs 18, 30, 40, 60 Right-of-use 1 ~ 65 Ships 9 Others 4 ~ 15 A component that is significant compared to the total cost of property, plant and equipment is depreciated over its separate useful life. Depreciation methods, residual values and useful lives of property, plant and equipment are reviewed at the end of each reporting period and if change is deemed appropriate, it is treated as a change in accounting estimate. Property, plant and equipment are derecognized on disposal, or when no future economic benefits are expected from its use or disposal. Gains or losses arising from derecognition of an item of property, plant and equipment, measured as the difference between the net disposal proceeds and the carrying amount of the asset, are recognized in profit or loss when the asset is derecognized.
Investment property	(16) Investment property A property held for the purpose of earning rentals or benefiting from capital appreciation is classified as investment property. Investment property is initially measured at its cost. Transaction costs are included in the initial measurement. Subsequently, investment property is carried at depreciated cost less any accumulated impairment losses. Subsequent costs are recognized in the carrying amount of investment property at cost or, if appropriate, as separate items if it is probable that future economic benefits associated with the item will flow to the Company and the cost of the item can be measured reliably. The carrying amount of the replaced part is derecognized. The costs of the day-to-day Investment properties except for land, are depreciated on a straight-line basis over 8 ~ 40 years as estimated useful lives. The estimated useful lives, residual values and depreciation method are reviewed at the end of each reporting period, with the effect of any changes in estimate accounted for on a prospective basis. An investment property is derecognized upon disposal or when the investment property is permanently withdrawn from use and no future economic benefits are expected from the disposal. Any gain or loss arising on derecognition of the property (calculated as the difference between the net disposal proceeds and the carrying amount of the asset) is included in profit or loss in the period in which the property is derecognized.
Intangible assets	(17) Intangible assets (i) Intangible assets acquired separately Intangible assets with finite useful lives that are acquired separately are carried at cost less accumulated amortization and accumulated impairment losses. Amortization is recognized on a straight-line basis over their estimated useful lives. The estimated useful life and amortization method are reviewed at the end of each reporting period, with the effect of any changes in estimate being accounted for on a prospective basis. Intangible assets with indefinite useful lives that are acquired separately are carried at cost less accumulated impairment losses. (ii) Research and development Expenditure on research activities is recognized as an expense in the period in which it is incurred. An internally-generated intangible asset arising from development (or from the development phase of an internal project) is recognized if, and only if, all of the following have been demonstrated: • The technical feasibility of completing the intangible asset so that it will be available for use or sale; • The intention to complete the intangible asset and use or sell it; • The ability to use or sell the intangible asset; • How the intangible asset will generate probable future economic benefits; • The availability of adequate technical, financial and other resources to complete the development and to use or sell the intangible asset; and • The ability to measure reliably the expenditure attributable to the intangible asset during its development. The amount initially recognized for internally-generated intangible assets is the sum of the expenditure incurred from the date when the intangible asset first meets the recognition criteria listed above. When the development expenditure does not meet the criteria listed above, an internally-generated intangible asset cannot be recognized and the expenditure is recognized in profit or loss in the period in which it is incurred. Internally-generated intangible assets are reported at cost less accumulated amortization and accumulated impairment losses. The estimated useful lives and amortization methods of the Company’s intangible assets are as follows: Useful lives (years) Amortization methods Usage rights for donated assets 10 ~ 30 Straight line Software 4, 5 Straight line Industrial rights 5 ~ 10 Straight line Development expenditures 5 Straight line Leasehold rights 8 ~ 10 Straight line Others 3 ~ 50 or indefinite Straight line Mining rights —  Unit of production (iii) Intangible assets acquired in a business combination Intangible assets that are acquired in a business combination are recognized separately from goodwill are initially recognized at their fair value at the acquisition date. Subsequent to initial recognition, intangible assets acquired in a business combination are reported at cost less accumulated amortization and accumulated impairment losses, on the same basis as intangible assets that are acquired separately. (iv) Derecognition of intangible assets An intangible asset is derecognized on disposal, or when no future economic benefits are expected from its use or disposal. Gains or losses arising from derecognition of an intangible asset are measured as the difference between the net disposal proceeds and the carrying amount of the asset, and are recognized in profit or loss when the asset is derecognized.
Greenhouse gas emissions rights (allowances) and obligations	(18) Greenhouse gas emissions rights (allowances) and obligations In accordance with the Act on the Allocation and Trading of Greenhouse Gas Emission Rights and its Enforcement Decree, the Company applies the following accounting policies for greenhouse gas emissions rights and obligations. (i) Greenhouse gas emissions rights Greenhouse gas emissions rights consist of the allowances received free of charge from the government and the ones purchased. The cost of the greenhouse gas emissions rights includes expenditures arising directly from the acquisition and any other costs incurred during normal course of the a cquisition Greenhouse gas emissions rights are held by the Company to fulfill the legal obligation and recorded as intangible assets. To the extent that the portion to be submitted to the government within one year from the end of reporting period, the greenhouse gas emissions rights are classified as current assets. Greenhouse gas emissions rights recorded as intangible assets are initially measured at cost and substantially remeasured at cost less accumulated impairment losses. Greenhouse gas emissions rights are derecognized on submission to the government or when no future economic benefits are expected from its use or disposal. (ii) Greenhouse gas emissions obligations Greenhouse gas emissions obligations are the Company’s present legal obligation to submit the greenhouse gas emissions allowances to the government and recognized when an outflow of resources is probable and a reliable estimate can be made of the amount of the obligation. Greenhouse gas emissions obligations are measured as the sum of the carrying amount of the allocated rights that will be submitted to the government and the best estimate of expenditure required to settle the obligation at the end of the reporting period for any excess emission.
Impairment of non-financial assets other than goodwill	(19) Impairment of non-financial At the end of each reporting period, the Company reviews the carrying amounts of its property, plant and equipment and intangible assets with definite useful lives Intangible assets with indefinite useful lives and intangible assets not yet available for use are tested for impairment at least annually, and whenever there is an indication that the asset may be impaired. Recoverable amount is the higher of fair value less costs to sell and value in use. In assessing value in use, the estimated future cash flows are discounted to their present value using a pre-tax If the recoverable amount of an asset (or a CGU) is estimated to be less than its carrying amount, the carrying amount of the asset (or CGU) is reduced to its recoverable amount. An impairment loss is recognized immediately in profit or loss. When an impairment loss subsequently reverses, the carrying amount of the asset (or a CGU) is increased to the revised estimate of its recoverable amount, to the extent the increased carrying amount does not exceed the carrying amount that would have been determined had no impairment loss been recognized for the asset (or CGU) in prior years. A reversal of an impairment loss is recognized immediately in profit or loss.
Inventories	(20) Inventories Inventories are measured at the lower of cost and net realizable value. Cost of inventories for inventories in transit are measured by using specific identification method. Cost of inventories, except for those in transit, are measured under the weighted average method and consists of the purchase price, cost of conversion and other costs incurred in bringing the inventories to their present location and condition. Net realizable value is the estimated selling price in the ordinary course of business, less the estimated costs of completion and selling expenses. The amount of any write-down of inventories to net realizable value and all losses of inventories are recognized as an expense in the period the write-down or loss occurs. The amount of any reversal of any write-down of inventories, arising from an increase in net realizable value, are recognized as a reduction in the amount of inventories recognized as an expense in the period in which the reversal occurs.
Provisions	(21) Provisions Provisions are recognized when the Company has a present legal or constructive obligation as a result of a past event, it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation and a reliable estimate can be made of the amount of the obligation. The risks and uncertainties that inevitably surround many events and circumstances are taken into account in reaching the best estimate of a provision. Where the effect of the time value of money is material, provisions are determined at the present value of the expected future cash flows. Where some or all of the expenditures required to settle a provision are expected to be reimbursed by another party, the reimbursement shall be recognized when, and only when, it is virtually certain that reimbursement will be received if the entity settles the obligation. The reimbursement shall be treated as a separate asset. Provisions are reviewed at the end of each reporting period and adjusted to reflect the current best estimates. If it is no longer probable that an outflow of resources embodying economic benefits will be required to settle the obligation, the provision is reversed. (i) Provision for employment benefits The Company determines the provision for employment benefits as the incentive payments based on the results of the individual performance evaluation or management assessment. (ii) Provision for decommissioning costs of nuclear power plants The Company records the fair value of estimated decommissioning costs as a liability in the period in which the Company incurs a legal obligation associated with retirement of long-lived assets that result from acquisition, construction, development and/or normal use of the assets. Accretion expense consists of period-to-period (iii) Provision for disposal of spent nuclear fuel Under the Radioactive Waste Management Act, the Company is levied to pay the spent nuclear fuel fund for the management of spent nuclear fuel. The Company recognizes the provision of present value of the payments. (iv) Provision for low and intermediate radioactive wastes Under the Radioactive Waste Management Act, the Company recognizes the provision for the disposal of low and intermediate radioactive wastes in best estimate of the expenditure required to settle the present obligation. (v) Provision for Polychlorinated Biphenyls (“PCBs”) Under the Persistent Organic Pollutants Control Act, enacted in 2007, the Company is required to remove PCBs, a toxin, from the insulating oil of its transformers by 2025. As a result of the enactments, the Company is required to inspect the PCBs contents of transformers and dispose of PCBs in excess of safety standards under the legally settled procedures. The Company’s estimates and assumptions used to determine fair value can be affected by many factors, such as the estimated costs of inspection and disposal, inflation rate, discount rate, regulations and the general economy. (vi) Provisions for the power plant region support programs The power plant region support programs consist of scholarship programs to local students, local economy support programs, local culture support programs, environment development programs, and local welfare programs. The Company recognizes the provision in relation to the power plant region support programs. (vii) Provisions for transmission and transformation facilities-neighboring areas support The Company has present obligation to conduct certain programs to support neighboring areas of our transmission and transformation facilities under the Act on Assistance to Electric Power Plants-Neighboring Areas. The Company recognizes the provision of estimated amount to fulfill the obligation. (viii) Renewable Portfolio Standard (“RPS”) provisions RPS program is required to generate a specified percentage of total electricity to be generated in the form of renewable energy and provisions are recognized for the governmental regulations to require the production of energies from renewable energy sources such as solar, wind and biomass.
Financial instruments	(22) Financial instruments The Company recognizes financial assets and financial liabilities in the consolidated statement of financial position when the Company becomes a party to the (i) Classification and measurement of financial assets The Company classifies financial assets into three principal categories; measured at amortized cost, fair value through other comprehensive income (FVOCI) and fair value through profit or loss (FVTPL) based on the business model in which assets are managed and their cash flow characteristics. The Company assesses the hybrid financial instrument in which derivatives embedded as a whole for classification. Cash flow characteristics Business model Solely payments of Other than SPPI To collect contractual cash flows Amortized cost FVTPL (*2) Both collecting contractual cash flows and selling financial assets FVOCI (*1) To sell financial assets FVTPL (*1) To eliminate or reduce an accounting mismatch, the Company may elect to recognize the amount of change in fair value in profit or loss. (*2) On initial recognition of an equity investment that is not held for trading, the Company may irrevocably elect to present subsequent changes in the investment’s fair value in OCI. ① A financial asset is measured at amortized cost if it meets both of the following conditions and is not designated as at FVTPL: 1) it is held within a business model whose objective is to hold assets to collect contractual cash flows; and 2) its contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. ② A financial asset is measured at FVOCI if it meets both of the following conditions and is not designated as at FVTPL: 1) it is held within a business ③ All financial assets not classified as measured at amortized cost or FVOCI as described above are measured at FVTPL. On initial recognition of equity investment that is not held for trading, the Company may irrevocably elect to present subsequent changes in fair value in OCI, and will not reclassify (recycle) those items in OCI to profit or loss subsequently. (ii) Classification and measurement of financial liabilities Financial liabilities are classified as FVTPL or other financial liabilities. ① A financial liability is classified as at FVTPL if it is classified as held-for-trading, ② A non-derivative (iii) Impairment: Financial assets and contract assets The Company applies a forward-looking ‘expected credit loss’ (ECL) model for debt instruments, lease receivables, contractual assets, loan commitments and financial guarantee contracts. The Company recognizes loss allowances measured on either of the 12-month Classification Loss allowances Stage 1 Credit risk has not increased significantly since the initial recognition 12-month ECL: ECLs that resulted from possible default events within the 12 months after the reporting date Stage 2 Credit risk has increased significantly since the initial recognition Lifetime ECL: ECL that resulted from all possible default events over the expected life of a financial instrument Stage 3 Credit-impaired Under IFRS 9, the Company always measures the loss allowance at an amount equal to lifetime expected credit losses for trade receivables or contract assets that result from transactions that are within the scope of IFRS 15 and that do not contain a significant financing component in accordance with IFRS 15, and if the trade receivables or contract assets include a significant financing component, the Company may choose as its accounting policy to measure the loss allowance at an amount equal to lifetime expected credit losses. The Company has chosen to measure the loss allowance at an amount equal to lifetime expected credit losses for the trade receivables, contract assets and lease receivables that contain a significant financing component. (iv) Derecognition The Company derecognizes a financial asset when the contractual rights to the cash flows from the financial asset expire, or it transfers the rights to receive the contractual cash flows in a transaction in which substantially all of the risks and rewards of ownership of the financial asset are transferred or in which the Company neither transfers nor retains substantially all of the risks and rewards of ownership and it does not retain control of the financial asset. The Company enters into transactions whereby it transfers assets recognized in its consolidated statement of financial position, but retains either all or substantially all of the risks and rewards of the transferred assets. In these cases, the transferred assets are not derecognized. The Company derecognizes a financial liability when its contractual obligations are discharged or cancelled or expire. On derecognition of a financial liability, the difference between the carrying amount extinguished and the consideration paid (including any non-cash
Service Concession Arrangements	(23) Service Concession Arrangements The Company recognizes revenues from construction services and operating services related to service concession arrangements in accordance with IFRS 15 ‘Revenue from Contracts with Customers’. The Company recognizes a financial asset to the extent that it has an unconditional contractual right to receive cash or another financial asset for the construction services and an intangible asset to the extent that it receives a right (license) to charge users of the public service. Borrowing costs attributable to the arrangement are recognized as an expense in the period in which they are incurred unless the Company has a contractual right to receive an intangible asset (a right to charge users of the public service). In this case, borrowing costs attributable to the arrangement are capitalized during the construction phase of the arrangement.
Derivative financial instruments, including hedge accounting	(24) Derivative financial instruments, including hedge accounting The Company enters into a variety of derivative arrangements to manage its exposure to interest rate and foreign exchange rate risk, including foreign exchange Derivatives are initially recognized at fair value. Subsequent to initial recognition, derivatives are measured at fair value. The resulting gain or loss is recognized in profit or loss immediately unless the derivative is designated and effective as a hedging instrument, in such case the timing of the recognition in profit or loss depends on the nature of the hedge relationship. A derivative with a positive fair value is recognized as a financial asset; a derivative with a negative fair value is recognized as a financial liability. A derivative is presented as a non-current non-current (i) Separable embedded derivatives Derivatives embedded in other financial instruments or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of the host contracts and when the host contracts are not measured at FVTPL. An embedded derivative is presented as a non-current non-current (ii) Hedge accounting The Company designates certain hedging instruments, which include derivatives, embedded derivatives and non-derivatives At the inception of the hedge relationship, the entity documents the relationship between the hedging instrument and the hedged item, along with its risk management objectives and its strategy for undertaking various hedge transactions. Furthermore, at the inception of the hedge and on an ongoing basis, the Company documents whether the hedging instrument is highly effective in offsetting changes in fair values or cash flows of the hedged item. (iii) Fair value hedges Changes in the fair value of derivatives that are designated and qualify as fair value hedges are recognized in profit or loss immediately, together with any changes in the fair value of the hedged asset or liability that are attributable to the hedged risk. The changes in the fair value of the hedging instrument and the change in the hedged item attributable to the hedged risk relating to the hedged items are recognized in the consolidated statements of comprehensive income or loss. Hedge accounting is discontinued when the Company revokes the hedging relationship, when the hedging instrument expires or is sold, terminated, or exercised, or when it no longer qualifies for hedge accounting. The fair value adjustment to the carrying amount of the hedged item arising from the hedged risk is amortized and recognized as profit or loss from that date. (iv) Cash flow hedges The effective portion of changes in the fair value of derivatives that are designated and qualify as cash flow hedges is recognized in other comprehensive income. The gain or loss relating to the ineffective portion is recognized immediately in profit or loss, and is included in the ‘finance income and expense’. Amounts previously recognized in other comprehensive income and accumulated in equity are reclassified to profit or loss in the periods when the hedged item is recognized in profit or loss, in the same line of the consolidated statement of comprehensive income or loss as the recognized hedged item. However, when the forecast transaction that is hedged results in the recognition of a non-financial non-financial non-financial non-financial Hedge accounting is discontinued when the Company revokes the hedging relationship, when the hedging instrument expires or is sold, terminated, or exercised, or it no longer qualifies for hedge accounting. Any gain or loss accumulated in equity at that time remains in equity and is recognized when the forecast transaction is ultimately recognized in profit or loss. When a forecast transaction is no longer expected to occur, the gain or loss accumulated in equity is recognized immediately in profit or loss.

Reporting Entity (Description_2

Reporting Entity (Description of the controlling company) (Tables)	12 Months Ended
	Dec. 31, 2023
Reporting Entity (Description of the controlling company) [Abstract]
Summary of the Company's Shareholders	As of December 31, 2023, KEPCO’s share capital amounts to ￦3,209,820 million and KEPCO’s shareholders are as follows: Number of Percentage of The Government of the Republic of Korea 116,841,794 18.20 % Korea Development Bank (KDB) 211,235,264 32.90 % Foreign investors 86,927,104 13.54 % Other 226,959,915 35.36 % 641,964,077 100.00 %

Material Accounting Policies (T

Material Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure Of Material Accounting Policies [Abstract]
Summary of Property, Plant and Equipment, Estimated Useful Lives	The estimated useful lives of the Company’s property, plant and equipment are as follows: Useful lives (years) Buildings 8 ~ 40 Structures 5 ~ 50 Machinery 2 ~ 32 Vehicles 3 ~ 8 Loaded heavy water 30 Asset retirement costs 18, 30, 40, 60 Right-of-use 1 ~ 65 Ships 9 Others 4 ~ 15
Summary of Intangible Assets, Estimated Useful Lives	The estimated useful lives and amortization methods of the Company’s intangible assets are as follows: Useful lives (years) Amortization methods Usage rights for donated assets 10 ~ 30 Straight line Software 4, 5 Straight line Industrial rights 5 ~ 10 Straight line Development expenditures 5 Straight line Leasehold rights 8 ~ 10 Straight line Others 3 ~ 50 or indefinite Straight line Mining rights —  Unit of production
Summary of Classification and Measurement of Financial Assets	The Company assesses the hybrid financial instrument in which derivatives embedded as a whole for classification. Cash flow characteristics Business model Solely payments of Other than SPPI To collect contractual cash flows Amortized cost FVTPL (*2) Both collecting contractual cash flows and selling financial assets FVOCI (*1) To sell financial assets FVTPL (*1) To eliminate or reduce an accounting mismatch, the Company may elect to recognize the amount of change in fair value in profit or loss. (*2) On initial recognition of an equity investment that is not held for trading, the Company may irrevocably elect to present subsequent changes in the investment’s fair value in OCI.

Segment, Geographic and Other_2

Segment, Geographic and Other Information (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of operating segments [abstract]
Summary of Financial Information of the Segments	(2) Financial information of the segments for the years ended December 31, 2021, 2022 and 2023, respectively, are as follows: 2021 Segment Total segment Intersegment Revenue Depreciation Interest Interest Profit (loss) Employee Loss on Increase in Operating In millions of won Transmission and distribution ￦ 58,999,388 1,672,776 57,326,612 3,990,464 36,831 678,986 391,116 193,412 202,262 1,194,643 (7,244,319 ) Electric power generation (Nuclear) 9,324,391 9,207,516 116,875 3,611,594 22,209 477,512 (18,146 ) 86,730 —  680,358 762,164 Electric power generation (Non-nuclear) 25,928,596 24,518,167 1,410,429 4,182,470 22,226 624,391 109,765 121,020 5,672 285,152 370,440 Plant maintenance & engineering service 2,805,785 2,370,900 434,885 121,493 9,515 933 11,849 94,269 —  213,500 245,360 Others 2,018,997 1,295,423 723,574 159,222 158,680 162,345 —  52,698 —  2,981 208,139 Consolidation (39,064,782 ) (39,064,782 ) —  (122,751 ) (27,587 ) (29,710 ) —  (36,187 ) —  89,818 (64,775 ) ￦ 60,012,375 —  60,012,375 11,942,492 221,874 1,914,457 494,584 511,942 207,934 2,466,452 (5,722,991 ) Finance income 1,402,614 Finance expense (3,245,777 ) Gain related to associates, joint ventures and subsidiaries 494,584 Loss before income tax ￦ (7,071,570 ) 2022 Segment Total segment Intersegment Revenue Depreciation Interest Interest Profit (loss) Employee Loss on Increase in Operating In millions of won Transmission and distribution ￦ 68,239,707 1,922,354 66,317,353 4,130,004 67,076 1,420,802 980,146 180,114 157,784 611,534 (33,623,874 ) Electric power generation (Nuclear) 10,386,091 10,254,271 131,820 4,034,774 45,789 557,218 (753 ) 82,466 —  624,221 761,109 Electric power generation (Non-nuclear) 41,944,339 39,252,851 2,691,488 4,091,081 53,242 694,559 329,112 140,067 —  619,947 289,001 Plant maintenance & engineering service 2,975,062 2,516,699 458,363 123,168 14,003 1,405 1,886 82,070 —  213,671 239,529 Others 2,750,231 1,803,231 947,000 211,719 195,966 195,860 —  53,017 3,125 9,463 333,547 Consolidation adjustments (55,749,406 ) (55,749,406 ) —  (129,334 ) (35,323 ) (51,298 ) —  (52,034 ) —  68,143 (239,843 ) ￦ 70,546,024 —  70,546,024 12,461,412 340,753 2,818,546 1,310,391 485,700 160,909 2,146,979 (32,240,531 ) Finance income 1,833,312 Finance expense (4,746,791 ) Gain related to associates, joint ventures and subsidiaries 1,310,391 Loss before income tax ￦ (33,843,619 ) 2023 Segment Total Intersegment Revenue Depreciation Interest Interest Profit (loss) Employee Loss on Increase in Operating In millions of won Transmission and distribution ￦ 85,082,542 1,728,602 83,353,940 4,258,909 92,380 2,826,916 314,373 127,038 182,742 419,564 (6,153,936 ) Electric power generation (Nuclear) 10,798,378 10,666,260 132,118 4,403,610 69,209 687,743 (2,639 ) 62,280 —  585,630 819,838 Electric power generation (Non-nuclear) 35,159,641 32,253,979 2,905,662 4,180,939 65,403 741,282 301,681 109,151 13,863 352,058 929,210 Plant maintenance & engineering service 3,091,022 2,626,190 464,832 129,628 23,638 1,270 (389 ) 52,890 —  206,215 355,284 Others 2,175,972 1,556,114 619,858 204,322 226,243 258,877 —  48,105 92 444 89,302 Consolidation adjustments (48,831,145 ) (48,831,145 ) —  (145,145 ) (47,253 ) (64,429 ) —  (40,734 ) —  47,171 (284,714 ) ￦ 87,476,410 —  87,476,410 13,032,263 429,620 4,451,659 613,026 358,730 196,697 1,611,082 (4,245,016 ) Finance income 1,425,031 Finance expense (5,347,018 ) Gain related to associates, joint ventures and subsidiaries 613,026 Loss before income tax ￦ (7,553,977 )
Summary of Information Related to Segment Assets and Liabilities	(3) Information related to segment assets and segment liabilities as of and for the years ended December 31, 2022 and 2023 are as follows: 2022 Segment Segment assets Investments Acquisition of non-current Segment In millions of won Transmission and distribution ￦ 131,023,727 5,678,141 6,055,179 108,963,058 Electric power generation (Nuclear) 69,129,625 143,304 2,008,409 42,843,974 Electric power generation (Non-nuclear) 69,468,039 3,113,918 3,547,815 40,428,907 Plant maintenance & engineering service 4,051,157 56,685 200,338 1,272,408 Others 12,895,981 —  839,885 5,796,718 Segment totals 286,568,529 8,992,048 12,651,626 199,305,065 Consolidation adjustments: Elimination of inter-segment amounts (43,801,723 ) —  (38,633 ) (9,304,648 ) Equity method adjustment 2,859,623 —  —  —  Deferred taxes (452 ) —  —  2,801,832 Others (10,820,983 ) —  —  2,489 (51,763,535 ) —  (38,633 ) (6,500,327 ) Consolidated totals ￦ 234,804,994 8,992,048 12,612,993 192,804,738 2023 Segment Segment assets Investments Acquisition of non-current Segment In millions of won Transmission and distribution ￦ 138,838,342 5,872,000 7,636,677 120,181,250 Electric power generation (Nuclear) 70,535,018 169,155 3,070,528 45,660,916 Electric power generation (Non-nuclear) 66,265,884 3,567,345 3,490,863 38,415,202 Plant maintenance & engineering service 4,271,409 54,088 203,352 1,549,863 Others 13,378,229 —  736,155 6,480,959 Segment totals 293,288,882 9,662,588 15,137,575 212,288,190 Consolidation adjustments: Elimination of inter-segment amounts (46,071,077 ) —  (390,686 ) (11,463,805 ) Equity method adjustment 2,997,016 —  —  —  Deferred taxes 1,636 —  —  1,629,280 Others (10,501,492 ) —  —  (3,450 ) (53,573,917 ) —  (390,686 ) (9,837,975 ) Consolidated totals ￦ 239,714,965 9,662,588 14,746,889 202,450,215
Summary of Geographic Information	(4) Geographic information Electricity sales, the main operations of the Company, are conducted in the Republic of Korea. The following information on revenue from external customers and non-current assets is determined by the location of the customers and of the assets: Revenue from external customers Non-current assets (*2) Geographical unit 2021 2022 2023 2021 2022 2023 In millions of won Domestic ￦ 58,771,252 69,142,730 86,242,808 178,760,564 183,707,117 186,384,115 Overseas (*1) 1,241,123 1,403,294 1,233,602 3,572,784 4,724,416 4,822,845 ￦ 60,012,375 70,546,024 87,476,410 182,333,348 188,431,533 191,206,960 (*1) Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current asse (*2) The amounts exclude financial assets and deferred tax assets.

Classification of Financial I_2

Classification of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about financial instruments [abstract]
Classification of Financial Assets	(1) Classification of financial assets as of December 31, 2022 and 2023 are as follows: 2022 Financial assets Financial assets Financial assets Derivative assets Total In millions of won Current assets Cash and cash equivalents ￦ —  —  3,234,780 —  3,234,780 Current financial assets Current financial assets at fair value through profit or loss 3,181,791 —  —  —  3,181,791 Current financial assets at amortized costs —  —  16,762 —  16,762 Current derivative assets 154,730 —  —  134,873 289,603 Other financial assets —  —  798,819 —  798,819 Trade and other receivables —  —  10,461,822 —  10,461,822 3,336,521 —  14,512,183 134,873 17,983,577 Non-current assets Non-current financial assets Non-current financial assets at fair value through profit or loss 527,717 —  —  —  527,717 Non-current financial assets at fair value through other comprehensive income —  502,829 —  —  502,829 Non-current financial assets at amortized costs —  —  10,236 —  10,236 Non-current derivative assets 538,342 —  —  190,079 728,421 Other financial assets —  —  1,567,632 —  1,567,632 Trade and other receivables —  —  2,153,080 —  2,153,080 1,066,059 502,829 3,730,948 190,079 5,489,915 ￦ 4,402,580 502,829 18,243,131 324,952 23,473,492 2023 Financial assets Financial assets Financial assets Derivative assets Total In millions of won Current assets Cash and cash equivalents ￦ —  —  4,342,887 —  4,342,887 Current financial assets Current financial assets at fair value through profit or loss 2,054,021 —  —  —  2,054,021 Current financial assets at amortized costs —  —  28,905 —  28,905 Current derivative assets 227,434 —  —  80,298 307,732 Other financial assets —  —  716,739 —  716,739 Trade and other receivables —  —  11,985,735 —  11,985,735 2,281,455 —  17,074,266 80,298 19,436,019 Non-current Non-current Non-current 657,264 —  —  —  657,264 Non-current —  502,443 —  —  502,443 Non-current —  —  9,938 —  9,938 Non-current 503,514 —  —  189,148 692,662 Other financial assets —  —  1,683,907 —  1,683,907 Trade and other receivables —  —  2,193,587 —  2,193,587 1,160,778 502,443 3,887,432 189,148 5,739,801 ￦ 3,442,233 502,443 20,961,698 269,446 25,175,820
Classification of Financial Liabilities	(2) Classification of financial liabilities as of December 31, 2022 and 2023 are as follows: 2022 Financial liabilities at fair value through profit or loss Financial liabilities Derivative liabilities Total In millions of won Current liabilities Borrowings ￦ —  12,457,853 —  12,457,853 Debt securities —  10,201,149 —  10,201,149 Derivative liabilities 44,994 —  —  44,994 Trade and other payables —  11,983,549 —  11,983,549 44,994 34,642,551 —  34,687,545 Non-current liabilities Borrowings —  2,962,323 —  2,962,323 Debt securities —  94,984,040 —  94,984,040 Derivative liabilities 362,252 —  25,505 387,757 Trade and other payables —  5,638,914 —  5,638,914 362,252 103,585,277 25,505 103,973,034 ￦ 407,246 138,227,828 25,505 138,660,579 2023 Financial liabilities at fair value through profit or loss Financial liabilities Derivative liabilities Total In millions of won Current liabilities Borrowings ￦ —  16,446,821 —  16,446,821 Debt securities —  24,674,526 —  24,674,526 Derivative liabilities 18,379 —  —  18,379 Trade and other payables —  9,089,973 —  9,089,973 18,379 50,211,320 —  50,229,699 Non-current Borrowings —  3,392,831 —  3,392,831 Debt securities —  89,117,652 —  89,117,652 Derivative liabilities 410,291 —  23,564 433,855 Trade and other payables —  4,981,957 —  4,981,957 410,291 97,492,440 23,564 97,926,295 ￦ 428,670 147,703,760 23,564 148,155,994
Classification of Comprehensive Income (Loss) From Financial Instruments	(3) Classification of comprehensive income (loss) from financial instruments for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Cash and cash equivalents Interest income ￦ 12,692 51,872 100,205 Gain (loss) on foreign currency transactions and translations 34,923 22,158 (2,073 ) Financial assets at fair value through profit or loss Interest income 18,415 58,540 65,470 Dividends income 2,949 1,994 4,193 Gain (loss) on valuation of derivatives 450,896 336,049 144,797 Gain (loss) on transaction of derivatives 54,352 205,298 130,230 Gain (loss) on valuation of financial assets 8,858 (37,230 ) 128,307 Gain (loss) on disposal of financial assets 4,221 9,358 13,161 Financial assets at fair value through other comprehensive income Dividends income 7,573 26,881 21,748 Financial assets at amortized cost Interest income 797 1,308 2,929 Gain (loss) on foreign currency transactions and translations (3,647 ) 5,087 (1,774 ) Loans Interest income 25,196 33,545 44,029 Gain (loss) on foreign currency transactions and translations 729 596 127 Trade and other receivables Interest income 144,543 164,653 168,303 Gain (loss) on disposal of financial assets 2,452 —  —  Gain (loss) on foreign currency transactions and translations 14,207 1,019 27,363 Short-term financial instruments Interest income 7,531 15,827 34,260 Gain (loss) on foreign currency transactions and translations 32,218 3,513 —  Long-term financial instruments Interest income 12,470 14,371 14,183 Gain (loss) on foreign currency transactions and translations 27 1 —  Other financial assets Interest income 230 637 241 Derivatives (applying hedge accounting) Gain (loss) on valuation of derivatives (profit or loss) 211,180 149,888 76,814 Gain (loss) on valuation of derivatives (equity, before tax) (11,734 ) (93,699 ) (10,539 ) Gain (loss) on transaction of derivatives 31,351 54,422 19,604 Financial liabilities at fair value through profit or loss Gain (loss) on valuation of derivatives 2,751 (345,313 ) 961 Gain (loss) on transaction of derivatives (15,358 ) (110,236 ) (80,640 ) Financial liabilities carried at amortized cost Interest expense of borrowings and debt securities 1,316,269 2,142,220 3,636,887 Gain (loss) on repayment of financial liabilities (10 ) (15 ) —  Interest expense of trade and other payables 213,765 204,078 200,440 Interest expense of others 384,423 472,248 614,332 Other finance income 1,284 927 4,971 Other finance expenses 2,504 167 1,796 Gain (loss) on foreign currency transactions and translations (1,162,835 ) (936,269 ) (420,203 ) Derivatives (applying hedge accounting) Gain (loss) on valuation of derivatives (profit or loss) 158,167 83,594 11,627 Gain (loss) on valuation of derivatives (equity, before tax) (28,726 ) 28,647 2,021 Gain (loss) on transaction of derivatives 13,737 75,201 20,465

Restricted Deposits (Tables)

Restricted Deposits (Tables)	12 Months Ended
	Dec. 31, 2023
Restricted Deposits [Abstract]
Summary of Restricted Deposits	Restricted deposits as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Cash and cash equivalents Escrow accounts ￦ 2,912 3,010 Deposits for government project and others 30,586 26,969 Collateral provided for borrowings 250,346 190,525 Collateral provided for lawsuit 57 54 Deposits for transmission regional support program 8,626 9,481 Deposits for other business purposes 3,825 5,550 Short-term financial instruments Restriction on withdrawal related to ‘win-win growth program’ for small and medium enterprises and others 101,500 80,500 Collateral provided for borrowings 1,000 24,728 Non-current financial assets at fair value through profit or loss Decommissioning costs of nuclear power plants 386,220 271,047 Long-term financial instruments Escrow accounts 1,603 —  Guarantee deposits for banking accounts at oversea branches 18 36 Collateral provided for borrowings 21,745 28,245 Decommissioning costs of nuclear power plants 497,609 655,030 Other non-current assets Deposits for other business purposes 4,355 7,558 ￦ 1,310,402 1,302,733

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	12 Months Ended
	Dec. 31, 2023
Cash and cash equivalents [abstract]
Summary of Cash and Cash Equivalents	Cash and cash equivalents as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Cash ￦ 21,113 14,070 Other demand deposits 1,906,248 1,780,548 Short-term deposits classified as cash equivalents 1,063,290 1,107,687 Short-term investments classified as cash equivalents 244,129 1,440,582 ￦ 3,234,780 4,342,887

Trade and Other Receivables (Ta

Trade and Other Receivables (Tables)	12 Months Ended
	Dec. 31, 2023
Trade and other receivables [abstract]
Trade and Other Receivables	(1) Trade and other receivables as of December 31, 2022 and 2023 are as follows: 2022 Gross Allowance for doubtful accounts Present value discount Book In millions of won Current assets Trade receivables ￦ 9,700,880 (196,829 ) —  9,504,051 Other receivables 1,004,528 (44,388 ) (2,369 ) 957,771 10,705,408 (241,217 ) (2,369 ) 10,461,822 Non-current assets Trade receivables 197,955 (2,171 ) —  195,784 Other receivables 2,033,705 (65,065 ) (11,344 ) 1,957,296 2,231,660 (67,236 ) (11,344 ) 2,153,080 ￦ 12,937,068 (308,453 ) (13,713 ) 12,614,902 2023 Gross Allowance for doubtful accounts Present value discount Book In millions of won Current assets Trade receivables ￦ 11,239,601 (230,058 ) —  11,009,543 Other receivables 1,034,655 (53,683 ) (4,780 ) 976,192 12,274,256 (283,741 ) (4,780 ) 11,985,735 Non-current assets Trade receivables 207,668 (2,587 ) —  205,081 Other receivables 2,080,830 (80,270 ) (12,054 ) 1,988,506 2,288,498 (82,857 ) (12,054 ) 2,193,587 ￦ 14,562,754 (366,598 ) (16,834 ) 14,179,322
Other Receivables	(2) Other receivables as of December 31, 2022 and 2023 are as follows: 2022 Gross Allowance for doubtful accounts Present value Book In millions of won Current assets Non-trade receivables ￦ 459,245 (41,293 ) (21 ) 417,931 Accrued income 109,267 —  —  109,267 Deposits 289,580 —  (2,348 ) 287,232 Finance lease receivables (*1) 67,583 (1,802 ) —  65,781 Others 78,853 (1,293 ) —  77,560 1,004,528 (44,388 ) (2,369 ) 957,771 Non-current assets Non-trade receivables 140,128 (52,696 ) (182 ) 87,250 Accrued income 2,004 —  —  2,004 Deposits 459,861 —  (11,162 ) 448,699 Finance lease receivables (*2) 1,171,807 (2,703 ) —  1,169,104 Others 259,905 (9,666 ) —  250,239 2,033,705 (65,065 ) (11,344 ) 1,957,296 ￦ 3,038,233 (109,453 ) (13,713 ) 2,915,067 (*1)  Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦114,347 million. (*2)  Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦1,024,927 million.       2023 Gross Allowance for doubtful accounts Present value Book In millions of won Current assets Non-trade receivables ￦ 393,859 (49,626 ) (53 ) 344,180 Accrued income 133,033 —  —  133,033 Deposits 317,541 (4 ) (4,727 ) 312,810 Finance lease receivables (*1) 75,661 (2,761 ) —  72,900 Others 114,561 (1,292 ) —  113,269 1,034,655 (53,683 ) (4,780 ) 976,192 Non-current assets Non-trade receivables 198,453 (54,182 ) (102 ) 144,169 Accrued income 7,342 —  —  7,342 Deposits 441,721 (263 ) (11,952 ) 429,506 Finance lease receivables (*2) 1,173,500 (2,495 ) —  1,171,005 Others 259,814 (23,330 ) —  236,484 2,080,830 (80,270 ) (12,054 ) 1,988,506 ￦ 3,115,485 (133,953 ) (16,834 ) 2,964,698 (*1) Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦114,118 million. (*2) Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦943,316 million.
Aging Analysis of Trade Receivables	(4) Aging analysis of trade receivables as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Trade receivables: (not overdue) ￦ 9,509,775 11,120,582 Trade receivables: (impairment reviewed) 389,060 326,687 Less than 60 days 5,592 6,403 60 ~ 90 days 36,389 55,802 90 ~ 120 days 31,442 20,535 120 days ~ 1 year 99,655 58,350 Over 1 year 215,982 185,597 9,898,835 11,447,269 Less: allowance for doubtful accounts (199,000 ) (232,645 ) ￦ 9,699,835 11,214,624
Aging Analysis of Other Receivables	(5) Aging analysis of other receivables as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Other receivables: (not overdue) ￦ 2,857,253 2,857,337 Other receivables: (impairment reviewed) 180,980 258,148 Less than 60 days 92 5 60 ~ 90 days 13,643 27,634 90 ~ 120 days 2,982 727 120 days ~ 1 year 18,494 69,651 Over 1 year 145,769 160,131 3,038,233 3,115,485 Less: allowance for doubtful accounts (109,453 ) (133,953 ) Less: present value discount (13,713 ) (16,834 ) ￦ 2,915,067 2,964,698
Changes in the Allowance for Doubtful Accounts	(6) Changes in the allowance for doubtful accounts for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 Trade Other Trade Other Trade Other In millions of won Beginning balance ￦ 208,990 132,379 205,339 82,710 199,000 109,453 Bad debt expense 19,039 18,411 27,078 4,220 68,385 24,290 Write-off (21,809 ) (58,762 ) (26,319 ) (1,103 ) (26,109 ) (4,472 ) Reversal (1,071 ) (79 ) (3,444 ) (37 ) (5,577 ) (1,942 ) Others 190 (9,239 ) (3,654 ) 23,663 (3,054 ) 6,624 Ending balance ￦ 205,339 82,710 199,000 109,453 232,645 133,953

Financial Assets at Fair Valu_3

Financial Assets at Fair Value through Profit or Loss (Tables)	12 Months Ended
	Dec. 31, 2023
Financial assets at fair value through profit or loss [abstract]
Summary of Financial Assets at Fair Value Through Profit or Loss	(1) Financial assets at fair value through profit or loss as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Financial assets at fair value through profit or loss Beneficiary Certificate ￦ 294 121,406 130,363 107,252 Cooperative —  6,329 —  6,735 Others (*) 3,181,497 173,386 1,923,658 376,602 3,181,791 301,121 2,054,021 490,589 Financial assets designated as at fair value through profit or loss Debt with embedded derivatives —  226,596 —  166,675 ￦ 3,181,791 527,717 2,054,021 657,264 (*) ‘Other’ includes MMT which is composed of government bonds, RP(Repurchase Paper), CP(Commercial Paper), etc.
Summary of Income (Loss) from Financial Assets at fair Value Through Profit or Loss	(2) Details of income (loss) from financial assets at fair value through profit or loss for the years ended December 31, 2022 and 2023 are as f ollows: 2022 2023 In millions of won Beneficiary Certificate ￦ 4,527 (59 ) Cooperative 120 272 Debt with embedded derivatives 946 2,934 Others 27,068 207,984 ￦ 32,661 211,131

Financial Assets at Fair Valu_4

Financial Assets at Fair Value through Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2023
Financial assets at fair value through other comprehensive income [abstract]
Changes in Financial Assets at Fair Value through Other Comprehensive Income	(1) Changes in financial assets at fair value through other comprehensive income for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisition Disposal Valuation Others Ending balance In millions of won Equity securities Listed ￦ 273,826 —  —  28,585 (2,354 ) 300,057 Unlisted 160,790 9,451 —  33,237 (1,235 ) 202,243 434,616 9,451 —  61,822 (3,589 ) 502,300 Debt securities Corporate bond 491 —  —  38 —  529 435,107 9,451 —  61,860 (3,589 ) 502,829 Current financial assets at fair value through other comprehensive income ￦ —  —  —  —  —  —  Non-current financial assets at fair value through other comprehensive income 435,107 9,451 —  61,860 (3,589 ) 502,829 2023 Beginning Acquisition Disposal Valuation Others Ending balance In millions of won Equity securities Listed ￦ 300,057 430 —  (15,433 ) —  285,054 Unlisted 202,243 9,550 (5,332 ) 5,445 856 212,762 502,300 9,980 (5,332 ) (9,988 ) 856 497,816 Debt securities Corporate bond 529 4,080 —  18 —  4,627 502,829 14,060 (5,332 ) (9,970 ) 856 502,443 Current financial assets at fair value through other comprehensive income ￦ —  —  —  —  —  —  Non-current financial assets at fair value through other comprehensive income 502,829 14,060 (5,332 ) (9,970 ) 856 502,443
Financial Assets at Fair Value through Other Comprehensive Income	(2) Financial assets at fair value through other comprehensive income as of December 31, 2022 and 2023 are as follows: 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Listed Korea District Heating Corp. 2,264,068 19.55 % ￦ 173,201 64,526 64,526 KG Mobility Co., Ltd. (formerly, Ssangyong Motor Co., Ltd.) 12,205 0.03 % 428 107 107 SM Korea Line Corp. 180 0.00 % 1 —  —  Namkwang Engineering & Construction Co., Ltd. 121 0.00 % 15 —  —  Bumyang Construction Co., Ltd. 35 0.00 % 2 —  —  ELCOMTEC Co., Ltd. 32,875 0.04 % 217 34 34 PAN Ocean Co., Ltd. 1,492 0.00 % 14 9 9 STX Heavy Industries Co., Ltd. 7,419 0.03 % 107 54 54 Codes Combine Co., Ltd. 291 0.00 % 1 1 1 PT Adaro Energy Tbk. 480,000,000 1.50 % 65,028 149,503 149,503 Denison Mines Corp. 58,284,000 7.09 % 84,134 84,502 84,502 Fission Uranium Corp. 100,000 1.73 % 41 75 75 SangSangin Industry Co., Ltd. 5,831 0.01 % 38 3 3 Vitzosys Co., Ltd. 399 0.00 % 2 —  —  EMnI Co., Ltd. 628 0.00 % 25 3 3 Vissem electronics, Co., Ltd. 229 0.00 % 11 1 1 KC Industry Co., Ltd. 139 0.00 % 6 —  —  Ihsung CNI Co., Ltd. 142,860 4.81 % 1,500 1,229 1,229 Aone Alform Co., Ltd. 2,672 0.04 % 19 10 10 324,790 300,057 300,057 Unlisted Intellectual Discovery Co., Ltd. 200,000 6.00 % ￦ 5,000 954 954 Hwan Young Steel Co., Ltd. 10,916 0.14 % 1,092 97 97 SAMBO AUTO. Co., Ltd. 15,066 0.02 % 38 38 38 Mobo Co., Ltd. 504 0.00 % 14 14 14 Dae Kwang Semiconductor Co., Ltd. 589 0.07 % 6 6 6 Sanbon Department Store 828 0.01 % 124 3 3 Miju Steel Mfg. Co., Ltd. 1,097 0.23 % 50 50 50 Sungwon Co., Ltd. 117 0.07 % 29 29 29 IMHWA Corp. 329 0.11 % 5 5 5 DALIM Special Vehicle Co., Ltd. 58 0.08 % 10 10 10 Altron Jeonju Co., Ltd. 34,846 1.34 % 697 5 5 Moonkyung Silica Co., Ltd. 42 0.56 % —  —  —  Sungkwang Timber Co., Ltd. 3 0.08 % 5 5 5 KS Remicon Co., Ltd. 12 0.04 % 3 3 3 Joongang Platec Co., Ltd. 3,591 0.75 % 72 35 35 Pyungsan SI Co., Ltd. 434 0.01 % 4 4 4 Samgong Development Co., Ltd. 12 0.01 % 7 7 7 Joongang Development Co., Ltd. 540 0.12 % 8 8 8 Newasia Co., Ltd. (formerly, AJS Co., Ltd.) 12,906 0.23 % 32 32 32 MSE Co., Ltd. 429 0.13 % 9 9 9 Ilrim Nano Tec Co., Ltd. 1,520 0.07 % 15 15 15 Ilsuk Co., Ltd. 152 0.17 % 10 10 10 Zyle Daewoo Motor Sales Co., Ltd. 22 0.00 % —  —  —  Daewoo Development Co., Ltd. 8 0.00 % —  —  —  Seyang Inc. 537 0.05 % 27 30 30 Seungri Enterprise Co., Ltd. 93 0.05 % 3 3 3 Shin-E P&C Co., Ltd. 1,569 0.64 % 110 2 2 Ejung Ad Co., Ltd. 132 0.09 % 3 3 3 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Solvus Co., Ltd. 1,056 0.04 % ￦ 3 3 3 Myung Co., Ltd. 89 0.05 % 2 2 2 Biwang Industry Co., Ltd. 406 0.04 % 2 2 2 Young Sung Co., Ltd. 89 0.40 % 26 26 26 Yuil Industrial Electronics Co., Ltd. 804 0.32 % 15 15 15 Woojin Industry Corporation 3 0.00 % 16 16 16 Kwang Sung Industry Co., Ltd. 325 0.35 % 7 7 7 Futech Mold Co., Ltd. 274 0.27 % 14 14 14 Woojoo Environment Ind. Co., Ltd. 101 0.11 % 13 13 13 Hyungji Esquire Co., Ltd. 61 0.02 % 22 22 22 Morado Co., Ltd. 209 0.04 % 2 2 2 Myung Sung Tex Co., Ltd. 20 0.00 % 2 2 2 Kwang Sung Co., Ltd. 610 0.53 % 31 31 31 Seen Business and Technology Co., Ltd. 29,424 0.73 % 148 7 7 Woobang Construction Co., Ltd. 8 0.00 % 8 8 8 Shin Pyung Co., Ltd. 6 0.03 % 3 3 3 JMC Heavy Industries Co., Ltd. 2,724 0.10 % 27 2 2 Najin Steel Co., Ltd. 37 0.06 % 5 5 5 Sinkwang Industry Co., Ltd. 1,091 1.68 % 5 5 5 Elephant & Friends Co., Ltd. 563 0.61 % 3 3 3 Mireco Co., Ltd. 109 0.25 % 11 11 11 L&K Industry Co., Ltd. 1,615 0.60 % 24 24 24 JO Tech Co., Ltd. 1,263 0.62 % 25 25 25 Kendae Printing Co., Ltd. 422 0.60 % 21 21 21 Dauning Co., Ltd. 231 0.41 % 6 6 6 Korea Trecision Co., Ltd. 22 0.45 % 5 5 5 Hurim Biocell Co., Ltd. 1,021 0.00 % 5 5 5 Smart Power Co., Ltd. 133,333 4.14 % 200 200 200 Sunjin Power Tech Co., Ltd. 4,941 0.92 % 247 32 32 Beer Yeast Korea Inc. 1,388 0.43 % 7 7 7 B CON Co., Ltd. 96 1.16 % 6 6 6 Ace Integration Co., Ltd. 105 0.09 % 24 24 24 AceInti Agricultural Co., Ltd. 16 0.02 % 5 5 5 KyungDong Co., Ltd. 130 0.01 % 1 1 1 ChunWon Development Co., Ltd. 193 0.19 % 39 39 39 SungLim Industrial Co., Ltd. 29 0.03 % 1 1 1 Korea Minerals Co., Ltd. 191 0.05 % 134 1 1 HyoDong Development Co., Ltd. 128 0.16 % 25 1 1 JoHyun Co., Ltd. 350 1.56 % 18 18 18 KC Co., Ltd. 5,107 0.17 % 26 26 26 SeongJi Industrial Co., Ltd. 41 0.05 % 1 1 1 Seyang Precision Ind.Co., Ltd. 829 0.23 % 41 41 41 Dooriwon Food System Co., Ltd. 13 0.27 % 1 1 1 Sung Kwang Co., Ltd. 23 0.37 % 6 6 6 Shinheung petrol. Co., Ltd. 699 0.14 % 35 35 35 Force TEC Co., Ltd. 3,501 0.02 % 18 18 18 Samsung Tech Co., Ltd. 486 1.28 % 97 36 36 Younil Metal Co., Ltd. 41 0.21 % 21 21 21 Sevenvalley JC (formerly, CJ Paradise Co., Ltd.) 24 0.02 % 12 12 12 Han Young Technology Company Co., Ltd. 35 0.00 % —  —  —  2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Ptotronics Co., Ltd. 843 0.42 % ￦ 84 6 6 NFT Co., Ltd. 136 0.40 % 8 8 8 Hyundaitech Co., Ltd. 1,363 0.87 % 27 27 27 Dasan Material Co., Ltd. 29 0.04 % 22 22 22 Fish World Co., Ltd. 47 0.21 % 2 2 2 SG Shinsung Engineering and Construction Co., Ltd. 10 0.00 % 6 —  —  Samdo Industry Electric Co., Ltd. 48 0.02 % 1 1 1 Taejung Industries Co., Ltd. 9,268 0.30 % 5 5 5 Shinsei Trading Co., Ltd. 64 0.72 % 6 6 6 Dynamic Co., Ltd. 111 0.19 % 3 3 3 Green Alchemy Co., Ltd. 38,202 1.48 % 191 17 17 Youone TBM Engineering & Construction Co., Ltd. 615 0.27 % 31 31 31 KM Leatech Co., Ltd. 1,648 0.98 % 8 8 8 Semist Co., Ltd. 555 0.80 % 3 3 3 Sewon Bus Co., Ltd 12 0.00 % —  —  —  Enertec Co., Ltd. 7,937 0.19 % 44 44 44 Sangji Co., Ltd. 20 0.26 % 4 4 4 Bellie Doughnuts Co., Ltd. 169 0.19 % 10 10 10 AIRTECH Information communication Co., Ltd. 2,379 0.60 % 12 12 12 Kiscom Co., Ltd. 1,493 0.04 % 1 1 1 Set Holding (*2) 1,100,220 2.50 % 229,255 163,580 163,580 Choheung packing Co., Ltd. 61 0.13 % 12 12 12 Jaewoo Co., Ltd. 359 0.24 % 11 11 11 Wooyang HC Co., Ltd 1,375 0.01 % 159 13 13 TheYeonriji Co., Ltd. 116 0.10 % 6 6 6 Flusys Co., Ltd. 9 0.08 % 2 2 2 DongSeo Electronics Co., Ltd. 347 0.07 % 17 17 17 Daewoo Display Co., Ltd. 177 0.03 % 5 5 5 NTS Co., Ltd. 143 0.22 % 36 36 36 AID CO., Ltd. 1,212 0.57 % 36 36 36 Changwon Eco-friendly farming Corp. 3 0.01 % —  —  —  Kumo Hitech Co., Ltd. 6,697 0.53 % 100 32 32 Kyung Pyo Industry Co., Ltd. 186 0.76 % 19 19 19 Doosung Heavy Industries Co., Ltd. 53 0.06 % 5 5 5 Samjoo Hightech Co., Ltd. 522 0.08 % 3 3 3 Samkwang Chemical Co., Ltd. 204 1.27 % 51 51 51 Shinseung Chemical Industy Co., Ltd. 5 0.01 % 60 —  —  KJ Alloy Co., Ltd. 368 0.20 % 7 7 7 SM Hi-tech Co., Ltd. 22 0.39 % 22 22 22 Puruen Environment Co., Ltd. 967 1.34 % 19 19 19 Miretech Co., Ltd. 9,111 0.27 % 18 18 18 Sejin Hightech Co., Ltd. 17,980 0.16 % 18 18 18 Eun Sung Enterprise Co., Ltd. 1,131 0.72 % 17 17 17 Shinyoung Textiles Co., Ltd. 523 1.01 % 52 23 23 Ilwoo Steel Co., Ltd. 41 0.28 % 17 17 17 Dong-un Tech Co., Ltd. 1,159 6.28 % 81 34 34 Wongwang Door Corp. 575 1.00 % 29 29 29 Mansu Co., Ltd. 344 0.25 % 15 15 15 Eanskorea Co., Ltd. 39 0.05 % 2 2 2 Youngdongseafood Co., Ltd. 165 0.33 % 8 8 8 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Hyunwoo Winstar Co., Ltd. 1 0.00 % ￦ —  —  —  Sungchang Tech Co., Ltd. 159 0.31 % 19 19 19 Yuchang Industry Co., Ltd. 90 0.11 % 5 5 5 Jeongpum Co., Ltd. 322 0.35 % 16 16 16 Korea Steel Power Co., Ltd. 2,761 1.88 % 55 2 2 Amanex Co., Ltd. 10 0.02 % 9 9 9 Dae-A Leisure Co., Ltd. 23 0.00 % 4 4 4 Caffe Bene Co., Ltd. 1,908 0.03 % 9 9 9 Shinjin International Corp. 4 0.01 % 1 1 1 Jinhung Packaging Co., Ltd 4,329 3.02 % 22 22 22 Donglim Eng Co., Ltd. 26 0.11 % 3 3 3 SIP Co., Ltd. 274 0.55 % 7 7 7 Clizen Co., Ltd. 615 0.34 % 31 31 31 Daeji Product Co., Ltd. 15 0.05 % 1 —  —  SSET Co., Ltd. 181 0.30 % 18 18 18 Sewon PM Tech Co., Ltd. 963 1.11 % 48 48 48 Dawon Yuhwa Co., Ltd. 506 1.94 % 25 25 25 Ogokbaekkwa Co., Ltd. 101 0.12 % 1 1 1 Ewon materials Co., Ltd. (formerly, Shinwoo Toptech Co., Ltd.) 834 0.51 % 83 6 6 KMLC Co., Ltd. 281 0.14 % 22 22 22 Seinfood Co., Ltd. 13 0.17 % 7 7 7 TaeSung Eco-Tech. Co., Ltd. 1,368 4.55 % 34 34 34 Kukex Inc. 639 0.05 % 3 3 3 Youngshin Plus Co., Ltd. 104 0.12 % 5 5 5 Chang won Engineering Co., Ltd. 22 0.00 % 4 4 4 Samsung Silup Co., Ltd. 47 0.19 % 5 5 5 Samwon Bio Tech Co., Ltd. 390 0.25 % 6 6 6 IZU KOREA Co., Ltd. 48 0.00 % 2 2 2 Dongdo CNP Co., Ltd. 234 0.36 % 6 6 6 Dae Bang Industry Co., Ltd. 115 0.13 % 6 6 6 S.I.T. Co., Ltd 2,213 0.44 % 22 22 22 Taejin Hiech Co., Ltd. 78 0.26 % 3 3 3 Headone Co., Ltd. 69 0.12 % 7 7 7 E-Won Solutech Co., Ltd. 158 0.16 % 40 40 40 KPL Circuit Co., Ltd. 283 0.08 % 14 14 14 Road Solar Co., Ltd. 12 0.00 % —  —  —  Han Mi Flexible Co., Ltd. 143 0.20 % 43 43 43 Millennium PNT Co., Ltd. 227 0.37 % 6 6 6 GN Chem Co., Ltd. 40 0.07 % 1 1 1 Dae Myung Co., Ltd. 114 0.08 % 3 3 3 Nanomicart Co., Ltd. 176 1.06 % 35 35 35 Young San Heavy Industries Co., Ltd. 74 0.11 % 7 7 7 Samchungwon Co., Ltd. 15 0.24 % 2 2 2 Wooyang Frozen Foods Co., Ltd. 66 0.82 % 27 27 27 Nanomic Co., Ltd. 94 0.63 % 38 38 38 Samsung Nonferrous Metal Co., Ltd. 89 0.26 % 9 9 9 Daewha Fuel Pump Ind., Ltd. 83 0.05 % 10 10 10 Addies Direct Co., Ltd. 1 0.00 % —  —  —  WorldCnM Inc. 131 1.09 % 10 10 10 Superone Co., Ltd. 1,585 1.45 % 8 8 8 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Buyoung Panji Co., Ltd. 478 0.44 % ￦ 12 12 12 International Paint Korea Co., Ltd. 111 0.48 % 11 11 11 EI Lighting Co., Ltd. 358 0.36 % 18 18 18 Hightech Mnp Co., Ltd. 123 0.35 % 6 6 6 Yooseung Co., Ltd. 10 0.08 % 1 1 1 Sungkwang Co., Ltd. 48 0.35 % 2 2 2 Taeyang gasteel Co., Ltd. 8 0.02 % 1 1 1 Ajin KSB Co., Ltd. 204 0.31 % 18 18 18 Sewon Ceramic Co., Ltd. 530 1.01 % 5 5 5 Choyang Tech Co., Ltd. 465 1.01 % 23 23 23 TK Co., Ltd. 307 0.70 % 15 15 15 Arari Co., Ltd. 14 0.05 % 1 1 1 C&S Corporation Co., Ltd. 1,304 0.01 % 13 13 13 Global The One of Korea Co., Ltd. 62 0.06 % 3 3 3 Steellife Co., Ltd. 85 0.06 % 4 4 4 D&C Castech Co., Ltd. 330 1.89 % 25 25 25 Geumhan Co., Ltd. 498 0.24 % 7 7 7 Mokgan Co., Ltd. 5 0.02 % 1 1 1 Wenex Co., Ltd. 373 0.53 % 19 19 19 Sulim Co., Ltd. 30 0.20 % 6 6 6 Shinkwang Engineering 24 0.36 % 2 2 2 Ek Cookware Co., Ltd. 60 0.04 % 1 1 1 KTTW Co., Ltd. 28 0.05 % 2 2 2 Avajar Co., Ltd. 1,061 0.01 % 1 1 1 Woosung I.B. Co., Ltd 7,071 0.07 % 14 14 14 CAP Korea Co., Ltd. 16 0.30 % 3 3 3 MSM Co., Ltd. 25 0.08 % —  —  —  Ddpopstyle Co., Ltd. 22 0.14 % 1 1 1 Finemetal Co., Ltd. 49 0.08 % 1 1 1 Sungkyeong Co., Ltd. 52 0.24 % 2 2 2 RMK Co., Ltd. 63 0.90 % 22 22 22 Newko Co., Ltd. 331 0.06 % 10 10 10 Dongsung Mulsan Co., Ltd. 137 0.34 % 14 14 14 Pizzakorea Co., Ltd. 42 0.18 % 9 9 9 Geumdani Co., Ltd. 2,377 1.82 % 36 36 36 Mezzanine I-pack Co., Ltd. 38 0.02 % 1 1 1 Ltop Co., Ltd. 36 0.06 % 7 7 7 Simile Aluminium Co., Ltd. 428 0.31 % 9 9 9 GT Tooling Co., Ltd. 604 0.17 % 6 6 6 Team Korea Co., Ltd. 4,782 0.37 % 24 24 24 Donghwa TCA Co., Ltd. 1,012 0.30 % 25 25 25 Hankook Piaget Co., Ltd. 4 0.01 % 1 1 1 Coco Food Co., Ltd. 648 1.24 % 33 33 33 Woori Industry Co., Ltd. 102 1.05 % 21 21 21 Ssangyong Youngweol Plant Service&Engineering Co., Ltd. 83 0.07 % 4 1 1 SH Co., Ltd. 39 0.20 % 8 8 8 Daeyoung Co., Ltd. 75 0.01 % 8 8 8 Chandown Food Co., Ltd. 46 0.14 % 9 9 9 Getron Co., Ltd. 7,259 0.20 % 37 4 4 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Jungmun Co., Ltd. 19 0.26 % ￦ 2 2 2 Andong Trading Corporation Co., Ltd. 42 0.00 % 2 2 2 JM Tech Co., Ltd. 403 0.67 % 82 10 10 SGC Energy Co., Ltd. 580,000 5.00 % 2,900 7,856 7,856 Le Soleil KHNP LLC 137,600 19.00 % 1,376 1,376 1,376 Ihsung CNI Co., Ltd. 127,660 4.30 % 1,500 2,016 2,016 H Robotics Co., Ltd. 903,601 8.05 % 4,000 5,638 5,638 Good Tcells Co., Ltd. 11,364 0.34 % 500 347 347 IPS Bio Co., Ltd. 1,975 3.13 % 1,000 843 843 Nine B Co., Ltd. 5,000 4.96 % 1,000 1,000 1,000 Choigang-gujo Co., Ltd. 61 0.45 % 6 1 1 Youngheung Industry Co., Ltd. 101 0.05 % 5 1 1 Hosungsteel Co., Ltd. 323 0.26 % 14 3 3 Uktae IND. Co., Ltd. 140 0.12 % 7 1 1 JFC Co., Ltd. 16 0.01 % 2 2 2 Hyundai Tech Co., Ltd. 28 0.69 % 10 10 10 Daeil Co., Ltd. 301 0.42 % 15 2 2 Seohan Food Co., Ltd. 83 0.19 % 2 2 2 Daehyeon Recycle Co., Ltd. 59 0.61 % 12 12 12 Metal Link Inc. Co., Ltd. 709 0.17 % 35 4 4 Pipetec Korea Co., Ltd. 50 0.07 % 10 1 1 SungJin Tech Co., Ltd. 803 1.20 % 24 8 8 Yujin E&C Co., Ltd. 29 0.18 % 6 —  —  Daishin Logistics Co., Ltd. 13 0.09 % 1 1 1 JinSung Engineering Co., Ltd. 18 0.30 % 18 18 18 Yongho Industry Co., Ltd. 157 0.22 % 32 1 1 Wow tech Co., Ltd. 369 0.75 % 11 11 11 World Power Tech Co., Ltd. 16 0.28 % 24 24 24 PBM Auto Co., Ltd. 1,001 1.06 % 10 10 10 K2 Motors Co., Ltd. 54 0.28 % 1 1 1 CL Tech Co., Ltd. 801 2.25 % 40 40 40 Mirae Industry Co., Ltd. 39 0.04 % 6 6 6 Gentak Korea Co., Ltd. 301 0.31 % 8 8 8 Sungjin Chemical Co., Ltd. 118 0.36 % 4 4 4 LMAT Co., Ltd. 198 0.04 % 20 20 20 Poong Lim Industrial Co., Ltd. 25 0.00 % 38 38 38 Dae Sung GeoTech Co., Ltd. 631 1.28 % 32 32 32 Saeheemang Co., Ltd. 756 0.60 % 15 15 15 Hakbong Precision Co., Ltd. 1,460 1.18 % 15 15 15 Vornech Co., Ltd. 431 0.37 % 11 2 2 Woojin Formtech Co., Ltd. 76 0.08 % 8 1 1 Korea Engineer Manufacturing Co., Ltd. 114 0.26 % 6 1 1 Sinwa J&K Co., Ltd. 476 0.28 % 5 5 5 Owon E&G Co., Ltd. 132 0.20 % 4 4 4 Guseong Co., Ltd. 141 0.20 % 3 3 3 Irefarm Co., Ltd. 45 0.30 % 3 3 3 Nam-hae E&C Co., Ltd. 117 0.10 % 2 2 2 Haenarae Agricultural Corp. 15 0.03 % 2 2 2 DECO&E Co., Ltd. 1,261 0.00 % 2 2 2 Design Beyond Co., Ltd. 17 0.19 % 2 2 2 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won LBK Co., Ltd. 8 0.05 % ￦ 1 1 1 Duckwon industrial Co., Ltd. 32 0.43 % 13 13 13 ASPT Co., Ltd. 64 0.82 % 19 19 19 SIMA Co., Ltd. 29 0.05 % 3 3 3 Jingkang Resources Co., Ltd. 90 1.57 % 13 13 13 Eslin Co., Ltd. 39 0.14 % 8 8 8 Shinwon Co., Ltd. 275 0.42 % 19 19 19 CIC Tech Co., Ltd. 96 0.54 % 10 10 10 Orano Expansion 5,742,405 4.72 % —  —  —  Fourever Co., Ltd. 44 0.10 % 4 4 4 Myungil Metal Co., Ltd. 80 0.10 % 4 4 4 Daeshin ECM Co., Ltd. 182 0.30 % 9 9 9 Greencarbon Co., Ltd. 79 0.06 % 1 1 1 Sunkoo Co., Ltd. 4 0.10 % 2 2 2 Jians Construction Co., Ltd. 45 0.01 % 2 4 4 DH trading Co., Ltd. 891 0.04 % 178 —  —  Sangsin Co., Ltd. 29 0.09 % 15 15 15 Steel focus Co., Ltd. 154 0.20 % 4 4 4 Kamada Korea Co., Ltd. 437 0.33 % 22 22 22 Fosys Co., Ltd. 19 0.08 % 4 4 4 GB precision Co., Ltd. 137 0.57 % 1 1 1 Ewon Art Co., Ltd. 185 0.61 % 9 9 9 DI Tech Co., Ltd. 3 0.00 % —  —  —  Hans AD Co., Ltd. 33 0.35 % 2 2 2 Chaegim Environment Development Co., Ltd. 158 0.01 % 3 3 3 Daesung Stain Co., Ltd. 32 0.32 % 2 2 2 YSM Co., Ltd. 281 2.07 % 14 14 14 Dong In Industry Co., Ltd. 65 0.13 % 3 3 3 U&I Co., Ltd. 50 0.22 % 5 5 5 World One Co., Ltd. 401 0.58 % 10 10 10 Yewon Co., Ltd. 24 0.02 % 1 —  —  TSNT Co., Ltd. 119 0.00 % 24 24 24 Shinsung Tech Co., Ltd. 314 0.01 % 16 16 16 JSL Co., Ltd. 51 0.49 % 3 3 3 Loft Garden Co., Ltd. 1 0.04 % —  —  —  Handon Co., Ltd. 74 0.25 % 11 11 11 GH Tech Co., Ltd. 82 0.22 % 3 3 3 Daeo Co., Ltd. 13 0.23 % 4 4 4 Bokwang Co., Ltd. 76 0.00 % 15 15 15 Samkum Industry Co., Ltd. 201 0.48 % 40 40 40 Dyntex Korea Co., Ltd. 75 0.28 % 15 15 15 Mirae Engineering Co., Ltd. 66 0.15 % 1 1 1 Mideumeul-juneun-namu Co., Ltd. 119 0.53 % 6 6 6 Seil Textile Co., Ltd. 16 0.15 % 3 3 3 Ilshin Tech Co., Ltd. 36 0.00 % 7 7 7 Magtec Co., Ltd. 28 0.00 % 6 6 6 Sukwon Co., Ltd. 2,885 0.59 % 29 29 29 Hae-sung Metal Co., Ltd. 159 0.17 % 3 3 3 White&Clean Foods Co., Ltd. 330 0.00 % 3 3 3 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Michang Cable Co., Ltd. 1,096 0.26 % ￦ 16 16 16 G.M Foods Co., Ltd. 57 0.16 % 9 9 9 Wecan Global Inc. Co., Ltd. 165 0.08 % 8 8 8 Daeju Steel Co., Ltd. 11 0.20 % 1 1 1 Hyundai Glass Co., Ltd. 860 0.83 % 43 43 43 MEC Co., Ltd. 16,468 1.17 % 41 41 41 Daeyeoneco Co., Ltd. 151 0.00 % 15 15 15 Hyesung Cable&Communication Inc. 762 0.39 % 38 38 38 Sangjin Co., Ltd. 428 0.35 % 21 21 21 Topis Co., Ltd. 246 0.71 % 14 14 14 G&L Tech Co., Ltd. 2 0.06 % —  —  —  Cheonhae Co., Ltd. 72 0.00 % 2 2 2 Iksan-guwon Co., Ltd. 563 0.00 % 11 11 11 Korea Remicon Co., Ltd. 36 0.03 % 5 5 5 New Tech Co., Ltd. 23 0.15 % 2 2 2 Segeon Co., Ltd. 124 0.00 % 4 4 4 MS Tech Co., Ltd. 9 0.15 % 1 1 1 J.I Steel Co., Ltd. 21 0.00 % 2 2 2 HNT Co., Ltd. 172 0.00 % 9 9 9 Taejin Co., Ltd. 27 0.08 % 3 3 3 Macroad Co., Ltd. 953 0.17 % 10 10 10 Woongjin Energy Co., Ltd. 94 0.00 % 9 9 9 Electric Contractors’ Financial Cooperative Co., Ltd. —  —  39 39 39 Information&Communication Financial Cooperative Co., Ltd. —  —  15 15 15 Common Computer Co., Ltd. 3,856 1.87 % 1,000 1,000 1,000 Fine Powerex Co., Ltd. 72,633 4.92 % 1,500 1,500 1,500 Eunsung Industrial Co., Ltd. 3 0.03 % 1 1 1 KPE Co., Ltd. 51 0.19 % 13 13 13 Dongbangfarms Co., Ltd. 904 0.55 % 41 5 5 Sungdo Pack Co., Ltd. 15 0.06 % 1 1 1 Coffeenie Co., Ltd. 2 0.00 % 1 1 1 Medi Pharma Plan Co., Ltd. 1,075 0.26 % 108 8 8 Woori Ascon Co., Ltd. 25 0.34 % 10 10 10 Dong Shin Hydraulies Co., Ltd. 9,460 0.14 % 47 47 47 Cheonwoo E.P.S Co., Ltd. 371 1.10 % 19 19 19 Koa Tech Co., Ltd. 1,244 0.77 % 12 12 12 Jinwoo Textile Co., Ltd. 91 0.68 % 9 9 9 SKE Cable Co., Ltd. 120 0.08 % 6 6 6 Hi Korea Co., Ltd. 1,845 1.94 % 185 185 185 Daeheung Engineering Co., Ltd. 65 0.01 % 1 1 1 Etapol Co., Ltd. 1,361 0.54 % 41 41 41 Yoongwon International Co., Ltd. 157 1.47 % 31 31 31 Avoh Ceramic&Bath Co., Ltd. 173 0.14 % 3 3 3 Dongyang R.P.F. Industrial Co., Ltd. 59 0.03 % 2 2 2 Yuil Engineering Co., Ltd. 14 0.03 % 1 1 1 Taesan Co., Ltd. 146 0.69 % 35 35 35 Jico Co., Ltd. 10,581 0.01 % 26 26 26 K Shipbuilding Co., Ltd. 8,622 0.25 % 1,078 1,078 1,078 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won Seokjin E&T Co., Ltd. 81 0.06 % ￦ 8 8 8 Agencore Co., Ltd. 104,350 5.67 % 1,200 1,200 1,200 SamHong Machinery. EMC Co., Ltd. 476,192 19.23 % 5,000 5,000 5,000 Thermo Tec Co., Ltd. 446 0.03 % 4 4 4 DaeYang Hydro Co., Ltd. 6 0.02 % 1 1 1 SangMoo Steel Co., Ltd. 24 0.04 % 2 2 2 Jungin Distribution Co., Ltd. 17 0.00 % 3 3 3 TheSun Co., Ltd. 77 0.06 % 1 1 1 Daedong Co., Ltd. 176 0.33 % 18 18 18 Daewoong and Technology Co., Ltd. 423 1.14 % 42 42 42 Ebadom Co., Ltd. 361 0.21 % 58 58 58 ChoungHwa Precise Co., Ltd. 428 0.08 % 43 4 4 Snopa Co., Ltd. 458 0.01 % 5 5 5 Aloha Factory Co., Ltd. 2,970 3.61 % 1,000 1,000 1,000 Dailyshot Co., Ltd. 339 1.85 % 1,001 1,001 1,001 Mediquitous Co., Ltd. 5,080 0.69 % 1,250 1,250 1,250 SKD Korea Co., Ltd. 40 0.28 % 20 20 20 Samhyup Co., Ltd. 376 0.91 % 38 38 38 Gogang Aluminum Co., Ltd. 828 1.52 % 41 41 41 Taekwang Paper Board Co., Ltd. 133 0.49 % 23 23 23 NY Tech Co., Ltd. 33 0.15 % 2 2 2 Sekwang Precision Co., Ltd. 394 0.84 % 79 79 79 Dongbang Metal Co., Ltd. 1,985 0.32 % 20 20 20 Samwang Co., Ltd. 170 0.25 % 17 17 17 Yurim CNF Co., Ltd. 15 0.23 % 2 2 2 Guseul Co., Ltd. 89 0.23 % 9 9 9 Gaone International Co., Ltd. 54 0.29 % 14 14 14 Daekwang Forging Co., Ltd. 1,298 1.99 % 130 130 130 Dongyang Pratech Co., Ltd. 265 1.21 % 29 29 29 Samjin Placo Co., Ltd. 661 0.52 % 33 33 33 MS Steel Industrial Co., Ltd. 167 0.40 % 8 8 8 STS Global Co., Ltd. 9 0.04 % 1 1 1 Y Tech Co., Ltd. 855 0.65 % 34 34 34 CK Industry Co., Ltd. 4,178 7.54 % 167 167 167 J&J Tech Co. 14 0.22 % 1 1 1 Shield Board Co., Ltd. 165 0.15 % 3 3 3 SFC International Co., Ltd. 11 0.01 % 1 1 1 Korea Ocean Machinery & Technology Co., Ltd. 763 0.45 % 76 76 76 Hana ITM Inc. 8,443 0.70 % 84 84 84 Jeuvis Co., Ltd. 191 0.30 % 2 2 2 JBM Co., Ltd. 662 0.34 % 20 20 20 Jungwoo Metal Solution Co., Ltd. 27 0.08 % 2 2 2 MS Precision Co., Ltd. 220 0.16 % 22 22 22 YM Tech Co., Ltd. 2 0.01 % 1 1 1 C&C ENG Co., Ltd. 439 1.59 % 22 22 22 Minjin Co., Ltd. 24 0.01 % 1 1 1 Daejoo E&G Co., Ltd. 133 0.00 % 27 27 27 Taeyoung Precision Co., Ltd. 31 0.22 % 1 1 1 Shin Heung Precision Co., Ltd. 93 4.63 % 4 4 4 2022 Shares Ownership Acquisition cost Book value Fair value In millions of won TaeGwang P&C Co., Ltd. 530 0.90 % ￦ 13 13 13 KyeongGwang Tech Co., Ltd. 244 1.04 % 7 7 7 269,065 202,243 202,243 Debt securities Aron Flying Ship Co., Ltd. (*1) —  —  ￦ 500 529 529 ￦ 594,355 502,829 502,829 (*1) The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide. (*2) The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2022. 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Listed Korea District Heating Corp. 2,264,068 19.55 % ￦ 173,201 55,356 55,356 KG Mobility Co., Ltd. (formerly, Ssangyong Motor Co., Ltd.) 12,205 0.01 % 428 106 106 SM Korea Line Corp. 180 0.00 % 1 —  —  Namkwang Engineering & Construction Co., Ltd. 46 0.00 % 15 —  —  Bumyang Construction Co., Ltd. 35 0.00 % 2 —  —  ELCOMTEC Co., Ltd. 32,875 0.04 % 217 43 43 PAN Ocean Co., Ltd. 1,492 0.00 % 14 6 6 STX Heavy Industries Co., Ltd. 68,874 0.24 % 537 806 806 Codes Combine Co., Ltd. 291 0.00 % 1 1 1 PT Adaro Energy Tbk. 480,000,000 1.50 % 65,028 95,505 95,505 Denison Mines Corp. 58,284,000 6.54 % 84,134 131,790 131,790 Fission Uranium Corp. 100,000 0.01 % 41 105 105 SangSangin Industry Co., Ltd. 1,457 0.01 % 38 3 3 Vitzrosys Co., Ltd. 399 0.00 % 2 —  —  EMnI Co., Ltd. 628 0.00 % 25 1 1 Vissem electronics, Co., Ltd. 301 0.00 % 11 1 1 KC Industry Co., Ltd. 139 0.00 % 6 —  —  Aone Alform Co., Ltd. 2,672 0.04 % 19 4 4 Ihsung CNI Co., Ltd. 142,860 4.81 % 1,500 1,327 1,327 BDI Co., Ltd. (*3) 6,390,478 32.54 % —  —  —  325,220 285,054 285,054 Unlisted (*1) Hwan Young Steel Co., Ltd. 10,916 0.14 % ￦ 1,092 97 97 SAMBO AUTO. Co., Ltd. 15,066 0.02 % 38 38 38 Mobo Co., Ltd. 504 0.00 % 14 14 14 Dae Kwang Semiconductor Co., Ltd. 589 0.07 % 6 6 6 Sanbon Department Store 828 0.01 % 124 3 3 Miju Steel Mfg. Co., Ltd. 1,097 0.23 % 50 50 50 Sungwon Co., Ltd. 117 0.07 % 29 29 29 IMHWA Corp. 329 0.11 % 5 5 5 DALIM Special Vehicle Co., Ltd. 58 0.08 % 10 10 10 Moonkyung Silica Co., Ltd. 42 0.56 % —  —  —  Sungkwang Timber Co., Ltd. 3 0.08 % 5 5 5 KS Remicon Co., Ltd. 12 0.04 % 3 3 3 Joongang Platec Co., Ltd. 3,591 0.75 % 72 35 35 Pyungsan SI Co., Ltd. 434 0.01 % 4 4 4 Samgong Development Co., Ltd. 12 0.01 % 7 7 7 Joongang Development Co., Ltd. 540 0.12 % 8 8 8 Newasia Co., Ltd. (formerly, AJS Co., Ltd.) 12,906 0.23 % 32 32 32 MSE Co., Ltd. 429 0.13 % 9 9 9 Ilrim Nano Tec Co., Ltd. 1,520 0.07 % 15 15 15 Ilsuk Co., Ltd. 152 0.17 % 10 10 10 Zyle Daewoo Motor Sales Co., Ltd. 22 0.00 % —  —  —  Daewoo Development Co., Ltd. 8 0.00 % —  —  —  Seyang Inc. 537 0.05 % 27 30 30 Seungri Enterprise Co., Ltd. 93 0.05 % 3 3 3 Shin-E 1,569 0.64 % 110 2 2 Ejung Ad Co., Ltd. 132 0.09 % 3 3 3 Solvus Co., Ltd. 1,056 0.04 % 3 3 3 Myung Co., Ltd. 89 0.05 % 2 2 2 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Biwang Industry Co., Ltd. 406 0.04 % ￦ 2 2 2 Young Sung Co., Ltd. 89 0.40 % 26 26 26 Yuil Industrial Electronics Co., Ltd. 804 0.32 % 15 15 15 Woojin Industry Corporation 3 0.00 % 16 16 16 Kwang Sung Industry Co., Ltd. 325 0.35 % 7 7 7 Futech Mold Co., Ltd. 274 0.27 % 14 14 14 Woojoo Environment Ind. Co., Ltd. 101 0.11 % 13 13 13 Hyungji Esquire Co., Ltd. 61 0.02 % 22 22 22 Morado Co., Ltd. 209 0.04 % 2 2 2 Myung Sung Tex Co., Ltd. 20 0.00 % 2 2 2 Kwang Sung Co., Ltd. 610 0.53 % 31 31 31 Seen Business and Technology co., Ltd. 29,424 0.73 % 148 7 7 Woobang Construction Co., Ltd. 8 0.00 % 8 8 8 Shin Pyung Co., Ltd. 6 0.03 % 3 3 3 JMC Heavy Industries Co., Ltd. 2,724 0.10 % 27 2 2 Najin Steel Co., Ltd. 37 0.06 % 5 5 5 Sinkwang Industry Co., Ltd. 1,091 1.68 % 5 5 5 Elephant & Friends Co., Ltd. 563 0.61 % 3 3 3 Mireco Co., Ltd. 109 0.25 % 11 11 11 L&K Industry Co., Ltd. 1,615 0.60 % 24 24 24 JO Tech Co., Ltd. 1,263 0.62 % 25 25 25 Kendae Printing Co., Ltd. 422 0.60 % 21 21 21 Dauning Co., Ltd. 231 0.41 % 6 6 6 Korea Trecision Co., Ltd. 22 0.45 % 5 5 5 Hurim Biocell Co., Ltd. 1,021 0.00 % 5 5 5 Sunjin Power Tech Co., Ltd. 4,941 0.92 % 247 32 32 Beer Yeast Korea Inc. 1,388 0.43 % 7 7 7 B CON Co., Ltd. 96 1.16 % 6 6 6 Ace Integration Co., Ltd. 105 0.09 % 24 24 24 AceInti Agricultural Co., Ltd. 16 0.02 % 5 5 5 KyungDong Co., Ltd. 130 0.01 % 1 1 1 ChunWon Development Co., Ltd. 193 0.19 % 39 39 39 SungLim Industrial Co., Ltd. 29 0.03 % 1 1 1 Korea Minerals Co., Ltd. 191 0.05 % 134 1 1 HyoDong Development Co., Ltd. 128 0.16 % 25 1 1 JoHyun Co., Ltd. 350 1.56 % 18 18 18 KC Co., Ltd. 5,107 0.17 % 26 26 26 SeongJi Industrial Co., Ltd. 41 0.05 % 1 1 1 Seyang Precision Ind.Co., Ltd. 829 0.23 % 41 41 41 Dooriwon Food System Co., Ltd. 13 0.27 % 1 1 1 Sung Kwang Co., Ltd. 23 0.37 % 6 6 6 Shinheung petrol. Co., Ltd. 699 0.14 % 35 35 35 Samsung Tech Co., Ltd. 486 1.28 % 97 36 36 Younil Metal Co., Ltd. 41 0.21 % 21 21 21 Sevenvalley JC (formerly, CJ Paradise Co., Ltd.) 24 0.02 % 12 12 12 Han Young Technology Company Co., Ltd. 35 0.00 % —  —  —  Ptotronics Co., Ltd. 843 0.42 % 84 6 6 NFT Co., Ltd. 136 0.40 % 8 8 8 Hyundaitech Co., Ltd. 1,363 0.87 % 27 27 27 Dasan Material Co., Ltd. 29 0.04 % 22 22 22 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Fish World Co., Ltd. 47 0.21 % ￦ 2 2 2 SG Shinsung Engineering and Construction Co., Ltd. 10 0.00 % 6 —  —  Samdo Industry Electric Co., Ltd. 48 0.02 % 1 1 1 Taejung Industries Co., Ltd. 9,268 0.30 % 5 5 5 Shinsei Trading Co., Ltd. 64 0.72 % 6 6 6 Dynamic Co., Ltd. 111 0.19 % 3 3 3 Green Alchemy Co., Ltd. 38,202 1.48 % 191 17 17 KM Leatech Co., Ltd. 1,648 0.98 % 8 8 8 Semist Co., Ltd. 555 0.80 % 3 3 3 Sewon Bus Co., Ltd. 12 0.00 % —  —  —  Enertec Co., Ltd. 7,937 0.19 % 44 44 44 Sangji Co., Ltd. 20 0.26 % 4 4 4 Bellie Doughnuts Co., Ltd. 169 0.19 % 10 10 10 Set Holding (*2) 1,100,220 2.50 % 229,255 165,923 165,923 Choheung packing Co., Ltd. 61 0.13 % 12 12 12 Jaewoo Co., Ltd. 359 0.24 % 11 11 11 Wooyang HC Co., Ltd 1,375 0.01 % 159 13 13 TheYeonriji Co., Ltd. 116 0.10 % 6 6 6 Flusys Co., Ltd. 9 0.08 % 2 2 2 DongSeo Electronics Co., Ltd. 347 0.07 % 17 17 17 Daewoo Display Co., Ltd. 177 0.03 % 5 5 5 NTS Co., Ltd. 143 0.22 % 36 36 36 AID CO., Ltd. 1,212 0.57 % 36 36 36 Changwon Eco-friendly farming Corp. 3 0.01 % —  —  —  Kumo Hitech Co., Ltd. 6,697 0.53 % 100 32 32 Kyung Pyo Industry Co., Ltd. 186 0.76 % 19 19 19 Doosung Heavy Industries Co., Ltd. 53 0.06 % 5 5 5 Samjoo Hightech Co., Ltd. 522 0.08 % 3 3 3 Samkwang Chemical Co., Ltd. 204 1.27 % 51 51 51 Shinseung Chemical Industy Co., Ltd. 5 0.01 % 60 —  —  KJ Alloy Co., Ltd. 368 0.20 % 7 7 7 SM Hi-tech Co., Ltd. 22 0.39 % 22 22 22 Puruen Environment Co., Ltd. 967 1.34 % 19 19 19 Miretech Co., Ltd. 9,111 0.27 % 18 18 18 Sejin Hightech Co., Ltd. 17,980 0.16 % 18 18 18 Eun Sung Enterprise Co., Ltd. 1,131 0.72 % 17 17 17 Shinyoung Textiles Co., Ltd. 523 1.01 % 52 23 23 Ilwoo Steel Co., Ltd. 41 0.28 % 17 17 17 Dong-un Tech Co., Ltd. 1,159 6.28 % 81 34 34 Wongwang Door Corp. 575 1.00 % 29 29 29 Mansu Co., Ltd. 344 0.25 % 15 15 15 Eanskorea Co., Ltd. 39 0.05 % 2 2 2 Youngdongseafood Co., Ltd. 165 0.33 % 8 8 8 Hyunwoo Winstar Co., Ltd. 1 0.00 % —  —  —  Sungchang Tech Co., Ltd. 159 0.31 % 19 19 19 Yuchang Industry Co., Ltd. 90 0.11 % 5 5 5 Jeongpum Co., Ltd. 322 0.35 % 16 16 16 Korea Steel Power Co., Ltd. 2,761 1.88 % 55 2 2 Amanex Co., Ltd. 10 0.02 % 9 9 9 Dae-A Leisure Co., Ltd. 23 0.00 % 4 4 4 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Caffe Bene Co., Ltd. 1,908 0.03 % ￦ 9 9 9 Jinhung Packaging Co., Ltd. 4,329 3.02 % 22 22 22 Donglim Eng Co., Ltd. 26 0.11 % 3 3 3 SIP Co., Ltd. 274 0.55 % 7 7 7 Daeji Product Co., Ltd. 15 0.05 % 1 —  —  SSET Co., Ltd. 181 0.30 % 18 18 18 Sewon PM Tech Co., Ltd. 963 1.11 % 48 48 48 Dawon Yuhwa Co., Ltd. 506 1.94 % 25 25 25 Ewon materials Co., Ltd. (formerly, Shinwoo Toptech Co., Ltd.) 834 0.51 % 83 6 6 KMLC Co., Ltd. 281 0.14 % 22 22 22 Seinfood Co., Ltd. 13 0.17 % 7 7 7 TaeSung Eco-Tech. Co., Ltd. 1,368 4.55 % 34 34 34 Kukex Inc. 639 0.05 % 3 3 3 Youngshin Plus Co., Ltd. 104 0.12 % 5 5 5 Chang won Engineering Co., Ltd. 22 0.00 % 4 4 4 Samsung Silup Co., Ltd. 47 0.19 % 5 5 5 Samwon Bio Tech Co., Ltd. 390 0.25 % 6 6 6 IZU KOREA Co., Ltd. 48 0.00 % 2 2 2 Dongdo CNP Co., Ltd. 234 0.36 % 6 6 6 S.I.T. Co., Ltd 2,213 0.44 % 22 22 22 Taejin Hiech Co., Ltd. 78 0.26 % 3 3 3 Headone Co., Ltd. 69 0.12 % 7 7 7 E-Won Solutech Co., Ltd. 158 0.16 % 40 40 40 KPL Circuit Co., Ltd. 283 0.08 % 14 14 14 Road Solar Co., Ltd. 12 0.00 % —  —  —  Han Mi Flexible Co., Ltd. 143 0.20 % 43 43 43 Millennium PNT Co., Ltd. 227 0.37 % 6 6 6 Dae Myung Co., Ltd. 114 0.08 % 3 3 3 Young San Heavy Industries Co., Ltd. 74 0.11 % 7 7 7 Samchungwon Co., Ltd. 15 0.24 % 2 2 2 Wooyang Frozen Foods Co., Ltd. 66 0.82 % 27 27 27 Nanomic Co., Ltd. 94 0.63 % 38 38 38 Samsung Nonferrous Metal Co., Ltd. 89 0.26 % 9 9 9 Daewha Fuel Pump Ind., Ltd. 83 0.05 % 10 10 10 WorldCnM Inc. 131 1.09 % 10 10 10 Superone Co., Ltd. 1,585 1.45 % 8 8 8 Buyoung Panji Co., Ltd. 478 0.44 % 12 12 12 International Paint Korea Co., Ltd. 111 0.48 % 11 11 11 EI Lighting Co., Ltd. 358 0.36 % 18 18 18 Yooseung Co., Ltd. 10 0.08 % 1 1 1 Sungkwang Co., Ltd. 48 0.35 % 2 2 2 Ajin KSB Co., Ltd. 204 0.31 % 18 18 18 Sewon Ceramic Co., Ltd. 530 1.01 % 5 5 5 Choyang Tech Co., Ltd. 465 1.01 % 23 23 23 TK Co., Ltd. 307 0.70 % 15 15 15 Arari Co., Ltd. 14 0.05 % 1 1 1 C&S Corporation Co., Ltd. 1,304 0.01 % 13 13 13 Global The One of Korea Co., Ltd. 62 0.06 % 3 3 3 Steellife Co., Ltd. 85 0.06 % 4 4 4 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won Geumhan Co., Ltd. 498 0.24 % ￦ 7 7 7 Mokgan Co., Ltd. 5 0.02 % 1 1 1 Wenex Co., Ltd. 373 0.53 % 19 19 19 Sulim Co., Ltd. 30 0.20 % 6 6 6 Shinkwang Engineering 24 0.36 % 2 2 2 Ek Cookware Co., Ltd. 60 0.04 % 1 1 1 KTTW Co., Ltd. 28 0.05 % 2 2 2 Avajar Co., Ltd. 1,061 0.01 % 1 1 1 Woosung I.B. Co., Ltd. 7,071 0.07 % 14 14 14 CAP Korea Co., Ltd. 16 0.30 % 3 3 3 MSM Co., Ltd. 25 0.08 % —  —  —  Ddpopstyle Co., Ltd. 22 0.14 % 1 1 1 Finemetal Co., Ltd. 49 0.08 % 1 1 1 Sungkyeong Co., Ltd. 52 0.24 % 2 2 2 Newko Co., Ltd. 331 0.06 % 10 10 10 Dongsung Mulsan Co., Ltd. 137 0.34 % 14 14 14 Pizzakorea Co., Ltd. 42 0.18 % 9 9 9 Geumdani Co., Ltd. 2,377 1.82 % 36 36 36 Mezzanine I-pack Co., Ltd. 38 0.02 % 1 1 1 Ltop Co., Ltd. 36 0.06 % 7 7 7 Simile Aluminium Co., Ltd. 428 0.31 % 9 9 9 GT Tooling Co., Ltd. 604 0.17 % 6 6 6 Team Korea Co., Ltd. 4,782 0.37 % 24 24 24 Donghwa TCA Co., Ltd. 1,012 0.30 % 25 25 25 Hankook Piaget Co., Ltd. 4 0.01 % 1 1 1 Coco Food Co., Ltd. 648 1.24 % 33 33 33 Woori Industry Co., Ltd. 102 1.05 % 21 21 21 Ssangyong Youngweol Plant Service&Engineering Co., Ltd. 83 0.07 % 4 1 1 SH Co., Ltd. 39 0.20 % 8 8 8 Daeyoung Co., Ltd. 75 0.01 % 8 8 8 Getron Co., Ltd. 7,259 0.20 % 37 4 4 Jungmun Co., Ltd. 19 0.26 % 2 2 2 JM Tech Co., Ltd. 403 0.67 % 82 10 10 SGC Energy Co., Ltd. 580,000 5.00 % 2,900 6,249 6,249 Le Soleil KHNP LLC 137,600 19.00 % 1,376 1,376 1,376 Ihsung CNI Co., Ltd. 127,660 4.30 % 1,500 1,937 1,937 H Robotics Co., Ltd. 903,601 8.05 % 4,000 5,639 5,639 Good Tcells Co., Ltd. 11,364 0.33 % 500 399 399 IPS Bio Co., Ltd. 1,975 3.13 % 1,000 897 897 Nine B Co., Ltd. 5,000 4.96 % 1,000 1,000 1,000 Choigang-gujo Co., Ltd. 61 0.45 % 6 1 1 Hosungsteel Co., Ltd. 323 0.26 % 14 3 3 Uktae IND. Co., Ltd. 140 0.12 % 7 1 1 JFC Co., Ltd. 16 0.01 % 2 2 2 Hyundai Tech Co., Ltd. 28 0.69 % 10 10 10 Daeil Co., Ltd. 301 0.42 % 15 2 2 Daehyeon Recycle Co., Ltd. 59 0.61 % 12 12 12 Metal Link Inc. Co., Ltd. 709 0.17 % 35 4 4 Pipetec Korea Co., Ltd. 50 0.07 % 10 1 1 2023 Shares Ownership Acquisition cost Book value Fair value In millions of won SungJin Tech Co., Ltd. 803 1.20 % ￦ 24 8 8 Yujin E&C Co., Ltd. 29 0.18 % 6 —  —  Daishin Logistics Co., Ltd. 13 0.09 % 1 1 1 JinSung Engineering Co., Ltd. 18 0.30 % 18 18 18 Yongho Industry Co., Ltd. 157 0.22 % 32 1 1 Wow tech Co., Ltd. 369 0.75 % 11 11 11 World Power Tech Co., Ltd. 16 0.28 % 24 24 24 PBM Auto Co., Ltd. 1,001 1.06 % 10 10 10 K2 Motors Co., Ltd. 54 0.28 % 1 1 1 CL Tech Co., Ltd. 801 2.25 % 40 40 40 Mirae Industry Co., Ltd. 39 0.04 % 6 6 6 Gentak Korea Co., Ltd. 301 0.31 % 8 8 8 Sungjin Chemical Co., Ltd. 118 0.36 % 4 4 4 LMAT Co., Ltd. 198 0.04 % 20 20 20 Poong Lim Industrial Co., Ltd. 25 0.00 % 38 38 38 Dae Sung GeoTech Co., Ltd. 631 1.28 % 32 32 32 Saeheemang Co., Ltd. 756 0.60 % 15 15 15 Vornech Co., Ltd. 431 0.37 % 11 2 2 Woojin Formtech Co., Ltd. 76 0.08 % 8 1 1 Korea Engineer Manufacturing Co., Ltd. 114 0.26 % 6 1 1 Sinwa J&K Co., Ltd. 476 0.28 % 5 5 5 Owon E&G Co., Ltd. 132 0.20 % 4 4 4 Guseong Co., Ltd. 141 0.20 % 3 3 3 Irefarm Co., Ltd. 45 0.30 % 3 3 3 Haenarae Agricultural Corp. 15 0.03 % 2 2 2 DECO&E Co., Ltd. 1,261 0.00 % 2 2 2 Design Beyond Co., Ltd. 17 0.19 % 2 2 2 LBK Co., Ltd. 8 0.05 %

Financial Assets at Amortized_2

Financial Assets at Amortized Cost (Tables)	12 Months Ended
	Dec. 31, 2023
Financial Assets at Amortized Cost [Abstract]
Summary of Financial Assets at Amortized Cost	Financial assets at amortized cost as of December 31, 2022 and 2023 are as follows: 2022 Financial assets at amortized cost Book value In millions of won Government bonds ￦ 1,920 1,920 Others 25,078 25,078 ￦ 26,998 26,998 Current ￦ 16,762 16,762 Non-current 10,236 10,236 2023 Financial assets at amortized cost Book value In millions of won Government bonds ￦ 1,528 1,528 Others 37,315 37,315 ￦ 38,843 38,843 Current ￦ 28,905 28,905 Non-current 9,938 9,938

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2023
Derivatives [Abstract]
Summary of Derivative	(1) Derivatives as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Derivative assets Currency forward ￦ 648 17,432 18,019 —  Currency swap 236,470 589,300 274,782 527,701 —Trading 102,080 410,540 196,013 347,689 —Hedging 134,390 178,760 78,769 180,012 Interest rate swap 52,485 81,188 12,124 129,570 —Trading 52,485 81,188 12,124 129,570 —Hedging —  —  —  —  Others (*2, 3) —  40,501 2,807 35,391 ￦ 289,603 728,421 307,732 692,662 Derivative liabilities Currency forward ￦ 32,660 —  4,755 —  Currency swap 6,319 328,995 6,867 287,824 —Trading 6,319 302,415 6,867 264,260 —Hedging —  26,580 —  23,564 Interest rate swap —  2,735 —  48,238 —Trading —  2,735 —  48,238 —Hedging —  —  —  —  Others (*1,2) 6,015 56,027 6,757 97,793 ￦ 44,994 387,757 18,379 433,855 (*1) In relation to the agreement to purchase hybrid securities issued by Samcheok Eco Materials Co., Ltd., an associate of the Company, the Company has recognized as other derivative liabilities the fair value of ￦18,752 million for its performance obligation to the underwriter of the bonds. In addition, the Company has granted stock option to Chester Solar IV SpA, a joint venture of the Company, and 4 other third party investors, and recorded the related fair value of 5,986 (*2) The Company recorded the fair value of derivatives in accordance with the shareholders’ agreement of its associate, Hyundai Green Power Co., Ltd., as other derivatives. In addition, the fair value of the derivatives regarding the power sales agreement of its subsidiary, Elara Energy Project, LLC, were recorded as other derivatives. (*3) The Company recorded the fair value of derivatives regarding the Power Purchase Agreement (“PPA”) of its subsidiary Columboola Solar Farm Hold Co Pty., Ltd. as other derivatives.
Currency Forward Contracts which are not Designated as Hedge Instruments	(2) Currency forward contracts which are not designated as hedging instruments as of December 31, 2023 are as follows: Counterparty Contract date Maturity date Contract amounts Contract exchange rate (in won) Pay Receive In millions of won and thousands of foreign JP Morgan 2023.12.08 2024.01.05 W 41,535 EUR 29,419 W 1,411.83 JP Morgan 2023.12.13 2024.01.03 13,131 USD 10,000 1,313.10 Busan Bank 2023.12.14 2024.01.05 18,126 USD 14,000 1,294.70 Woori Bank 2023.12.14 2024.01.09 18,092 USD 14,000 1,292.30 Standard Chartered 2023.12.18 2024.01.11 6,480 USD 5,000 1,295.90 Korea Development Bank 2023.12.20 2024.01.15 10,383 USD 8,000 1,297.90 Shinhan Bank 2023.12.20 2024.01.17 9,074 USD 7,000 1,296.40 JP Morgan 2023.12.21 2024.01.19 16,929 USD 13,000 1,302.20 Hana Bank 2023.12.21 2024.01.12 14,329 USD 11,000 1,302.60 Kookmin Bank 2023.12.21 2024.01.23 14,324 USD 11,000 1,302.20 Mizuho Bank 2023.12.22 2024.01.25 10,382 USD 8,000 1,297.70 Standard Chartered 2023.12.26 2024.01.26 10,382 USD 8,000 1,297.70 Nonghyup Bank 2023.12.28 2024.01.29 6,446 USD 5,000 1,289.20 Morgan Stanley 2023.12.28 2024.01.31 14,159 USD 11,000 1,287.20 Busan Bank 2023.12.28 2024.02.02 10,296 USD 8,000 1,287.00 Woori Bank 2023.12.28 2024.02.05 10,298 USD 8,000 1,287.20 MUFG 2023.11.23 2024.02.05 10,348 USD 8,000 1,293.50 Nonghyup Bank 2023.11.30 2024.01.23 5,147 USD 4,000 1,286.75 MUFG 2023.11.30 2024.01.23 5,147 USD 4,000 1,286.65 JP Morgan 2023.11.30 2024.02.22 11,561 USD 9,000 1,284.60 Morgan Stanley 2023.12.01 2024.01.23 5,199 USD 4,000 1,299.85 Korea Development Bank 2023.12.01 2024.01.15 14,303 USD 11,000 1,300.30 Mizuho Bank 2023.12.01 2024.02.14 10,386 USD 8,000 1,298.25 JP Morgan 2023.12.04 2024.02.14 6,485 USD 5,000 1,296.90 Nonghyup Bank 2023.12.06 2024.02.14 5,231 USD 4,000 1,307.75 MUFG 2023.12.13 2024.02.06 19,700 USD 15,000 1,313.30 JP Morgan 2023.12.13 2024.02.06 17,072 USD 13,000 1,313.20 Mizuho Bank 2023.12.15 2024.02.06 12,916 USD 10,000 1,291.55 Korea Development Bank 2023.12.15 2024.02.14 11,617 USD 9,000 1,290.80 Busan Bank 2023.12.20 2024.02.26 5,183 USD 4,000 1,295.80 SMBC 2023.12.20 2024.03.13 19,416 USD 15,000 1,294.43 Nonghyup Bank 2023.12.21 2024.01.05 26,065 USD 20,000 1,303.25 JP Morgan 2023.12.21 2024.01.05 26,064 USD 20,000 1,303.20 MUFG 2023.12.21 2024.01.05 27,365 USD 21,000 1,303.10 Hana Bank 2023.12.28 2024.01.15 18,041 USD 14,000 1,288.65 Mizuho Bank 2023.12.28 2024.02.26 32,146 USD 25,000 1,285.85 JP Morgan 2023.12.28 2024.03.26 8,984 USD 7,000 1,283.40 Woori Bank 2023.11.30 2024.01.03 6,440 USD 5,000 1,287.95 Nonghyup Bank 2023.11.30 2024.01.03 4,119 USD 3,200 1,287.15 Woori Bank 2023.12.20 2024.01.22 6,487 USD 5,000 1,297.30 Woori Bank 2023.12.27 2024.01.29 6,466 USD 5,000 1,292.20 Mizuho Bank 2023.12.28 2024.02.02 6,446 USD 5,000 1,289.25 Nonghyup Bank 2023.12.28 2024.02.02 12,882 USD 10,000 1,288.20 HSBC 2020.10.19 2024.10.29 140,913 USD 125,000 1,127.30 JP Morgan 2023.12.08 2024.01.05 6,541 USD 5,000 1,308.20 Counterparty Contract date Maturity date Contract amounts Contract exchange rate (in won) Pay Receive In millions of won and thousands of foreign Busan Bank 2023.12.12 2024.01.23 ￦ 19,686 USD 15,000 ￦ 1,312.40 Shinhan Bank 2023.12.14 2024.01.23 10,338 USD 8,000 1,292.19 Korea Citi Bank 2023.12.15 2024.01.15 6,467 USD 5,000 1,293.45 Nonghyup Bank 2023.12.18 2024.01.15 11,668 USD 9,000 1,296.45 Hana Bank 2023.12.27 2024.01.26 6,459 USD 5,000 1,291.89 Hana Bank 2023.12.27 2024.01.26 6,457 USD 5,000 1,291.39 JP Morgan 2023.11.02 2024.01.26 8,406 USD 6,286 1,337.20 HSBC 2023.11.27 2024.03.08 6,482 USD 5,000 1,296.30 HSBC 2023.11.27 2024.03.08 6,476 USD 5,000 1,295.20 Shinhan Bank 2023.12.08 2024.03.08 13,034 USD 10,000 1,303.38 Shinhan Bank 2023.12.15 2024.03.08 3,865 USD 3,000 1,288.22 Shinhan Bank 2023.12.28 2024.04.23 2,160 USD 1,684 1,282.40 Woori Bank 2023.12.28 2024.04.23 10,253 USD 8,000 1,281.65
Currency Swap Contracts Which Are Not Designated As Hedge Instruments	(3) Currency swap contracts which are not designated as hedging instruments as of December 31, 2023 are as follows Contract year Contract amount Contract interest rate Contract (in won, USD) Counterparty Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Standard Chartered 2014~2029 ￦ 102,470 USD 100,000 3.14% 3.57% ￦ 1,024.70 Societe Generale 2014~2024 105,017 USD 100,000 4.92% 5.13% 1,050.17 Hana Bank 2015~2024 107,970 USD 100,000 4.75% 5.13% 1,079.70 Credit Agricole 2015~2024 94,219 USD 86,920 4.85% 5.13% 1,083.97 Woori Bank 2019~2027 21,708 USD 19,417 5.04% 6.75% 1,118.00 Woori Bank 2019~2024 296,000 USD 250,000 1.21% 2.50% 1,184.00 Korea Development Bank 2019~2024 177,600 USD 150,000 1.24% 2.50% 1,184.00 Hana Bank 2019~2024 118,400 USD 100,000 1.24% 2.50% 1,184.00 Woori Bank 2020~2025 241,320 USD 200,000 0.54% 1.13% 1,206.60 Korea Development Bank 2020~2025 241,320 USD 200,000 0.54% 1.13% 1,206.60 Kookmin Bank 2020~2025 120,660 USD 100,000 0.54% 1.13% 1,206.60 Kookmin Bank 2020~2026 76,355 USD 70,445 5.83% 6.00% 1,083.90 Woori Bank 2021~2026 118,170 USD 100,000 1.11% 1.13% 1,181.70 Korea Development Bank 2021~2026 118,170 USD 100,000 1.11% 1.13% 1,181.70 Hana Bank 2021~2026 118,170 USD 100,000 1.11% 1.13% 1,181.70 Hana Bank 2022~2025 385,800 USD 300,000 3.11% 3.63% 1,286.00 Woori Bank 2022~2025 257,200 USD 200,000 3.12% 3.63% 1,286.00 JP Morgan 2022~2027 128,600 USD 100,000 3.56% 4.00% 1,286.00 Woori Bank 2022~2027 128,600 USD 100,000 3.56% 4.00% 1,286.00 Kookmin Bank 2022~2027 128,600 USD 100,000 3.56% 4.00% 1,286.00 Korea Development Bank 2022~2026 283,820 USD 200,000 4.67% 5.38% 1,419.10 Hana Bank 2022~2026 141,910 USD 100,000 4.68% 5.38% 1,419.10 JP Morgan 2022~2026 141,910 USD 100,000 4.69% 5.38% 1,419.10 Woori Bank 2022~2026 141,910 USD 100,000 4.68% 5.38% 1,419.10 Korea Development Bank 2022~2028 283,820 USD 200,000 5.12% 5.50% 1,419.10 Woori Bank 2022~2028 141,910 USD 100,000 5.13% 5.50% 1,419.10 Hana Bank 2023~2026 256,000 USD 200,000 3.97% 5.38% 1,280.00 Shinhan Bank 2023~2026 192,000 USD 150,000 3.99% 5.38% 1,280.00 Kookmin Bank 2023~2026 128,000 USD 100,000 4.03% 5.38% 1,280.00 Korea Development Bank 2023~2026 256,000 USD 200,000 4.04% 5.38% 1,280.00 Bank of America 2023~2026 128,000 USD 100,000 4.04% 5.38% 1,280.00 Standard Chartered 2023~2026 128,000 USD 100,000 4.04% 5.38% 1,280.00 Woori Bank 2023~2026 192,000 USD 150,000 4.05% 5.38% 1,280.00 Nomura 2015~2025 111,190 USD 100,000 2.60% 3.25% 1,111.90 Korea Development Bank 2015~2025 111,190 USD 100,000 2.62% 3.25% 1,111.90 Woori Bank 2015~2025 55,595 USD 50,000 2.62% 3.25% 1,111.90 Hana Bank 2015~2025 55,595 USD 50,000 2.62% 3.25% 1,111.90 Woori Bank 2017~2027 111,610 USD 100,000 2.25% 3.13% 1,116.10 Korea Development Bank 2017~2027 111,610 USD 100,000 2.31% 3.13% 1,116.10 Hana Bank 2017~2027 111,610 USD 100,000 2.31% 3.13% 1,116.10 Korea Development Bank 2018~2028 108,600 HKD 800,000 2.69% 3.35% 135.75 Shinhan Bank 2018~2028 115,387 HKD 850,000 2.66% 3.35% 135.75 Korea Citi Bank 2019~2024 239,956 CHF 200,000 1.44% 0.00% 1,199.78 Korea Development Bank 2019~2027 119,978 CHF 100,000 1.43% 0.05% 1,199.78 Woori Bank 2021~2026 222,800 USD 200,000 0.93% 1.25% 1,114.00 Contract year Contract amount Contract interest rate Contract (in won, USD) Counterparty Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Shinhan Bank 2021~2026 ￦ 111,400 USD 100,000 0.92% 1.25% ￦ 1,114.00 Korea Development Bank 2021~2026 111,400 USD 100,000 0.93% 1.25% 1,114.00 Nonghyup Bank 2021~2026 111,400 USD 100,000 0.93% 1.25% 1,114.00 Woori Bank 2022~2027 262,000 USD 200,000 3.62% 4.25% 1,310.00 Export-Import Bank of Korea 2022~2027 131,000 USD 100,000 3.63% 4.25% 1,310.00 Kookmin Bank 2022~2027 131,000 USD 100,000 3.62% 4.25% 1,310.00 Hana Bank 2022~2027 131,000 USD 100,000 3.61% 4.25% 1,310.00 Korea Development Bank 2022~2027 262,000 USD 200,000 3.63% 4.25% 1,310.00 Export-Import Bank of Korea 2022~2032 349,829 HKD 1,935,000 4.87% 5.16% 180.79 JP Morgan 2022~2032 75,194 HKD 415,000 5.00% 5.16% 181.19 Export-Import Bank of Korea 2023~2030 172,982 HKD 1,037,000 4.25% 4.51% 166.81 HSBC 2019~2024 USD 205,500 AUD 300,000 3M SOFR+1.04% 3M BBSW+0.97% USD 0.69
Currency Swap Contracts Which Are Designated As Hedge Instruments	(4) Currency swap contracts which are designated as hedging instruments as of December 31, 2023 Contract year Contract amount Contract interest rate Contract (in won) Counterparty Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Kookmin Bank 2020~2025 ￦ 118,780 USD 100,000 1.29% 2.13% ￦ 1,187.80 Shinhan Bank 2020~2025 118,780 USD 100,000 1.29% 2.13% 1,187.80 Hana Bank 2020~2025 118,780 USD 100,000 1.29% 2.13% 1,187.80 Korea Development Bank 2020~2026 118,910 USD 100,000 0.61% 1.00% 1,189.10 Hana Bank 2020~2026 118,910 USD 100,000 0.61% 1.00% 1,189.10 Woori Bank 2020~2026 118,910 USD 100,000 0.62% 1.00% 1,189.10 Nomura 2017~2037 52,457 EUR 40,000 2.60% 1.70% 1,311.42 Nomura 2017~2037 59,423 SEK 450,000 2.62% 2.36% 132.05 Kookmin Bank 2021~2026 114,230 USD 100,000 1.27% 1.25% 1,142.30 Korea Development Bank 2021~2026 114,230 USD 100,000 1.27% 1.25% 1,142.30 Hana Bank 2021~2026 114,230 USD 100,000 1.27% 1.25% 1,142.30 Korea Development Bank 2022~2027 123,710 USD 100,000 3.41% 3.63% 1,237.10 Woori Bank 2022~2027 123,710 USD 100,000 3.41% 3.63% 1,237.10 JP Morgan 2022~2027 123,710 USD 100,000 3.41% 3.63% 1,237.10 BNP Paribas 2019~2024 111,841 CHF 100,000 1.78% 0.13% 1,118.41 Kookmin Bank 2019~2024 111,841 CHF 100,000 1.78% 0.13% 1,118.41 Korea Development Bank 2022~2025 128,560 USD 100,000 3.37% 4.13% 1,285.60 Woori Bank 2022~2025 128,560 USD 100,000 3.37% 4.13% 1,285.60 Kookmin Bank 2022~2025 128,560 USD 100,000 3.37% 4.13% 1,285.60 Woori Bank 2021~2026 220,600 USD 200,000 0.47% 0.75% 1,103.00 Shinhan Bank 2021~2026 220,600 USD 200,000 0.47% 0.75% 1,103.00 Hana Bank 2021~2026 55,150 USD 50,000 0.48% 0.75% 1,103.00 Shinhan Bank 2023~2026 132,930 USD 100,000 4.07% 5.38% 1,329.30 Nonghyup Bank 2023~2026 132,930 USD 100,000 4.05% 5.38% 1,329.30 Kookmin Bank 2023~2026 132,930 USD 100,000 4.07% 5.38% 1,329.30 Woori Bank 2020~2025 245,560 USD 200,000 0.93% 1.75% 1,227.80 Hana Bank 2020~2025 245,560 USD 200,000 0.93% 1.75% 1,227.80 Korea Development Bank 2020~2025 122,780 USD 100,000 0.93% 1.75% 1,227.80 JP Morgan 2022~2025 126,180 USD 100,000 2.80% 3.60% 1,261.80 Hana Bank 2022~2025 126,180 USD 100,000 2.80% 3.60% 1,261.80 Korea Development Bank 2022~2025 252,360 USD 200,000 2.83% 3.60% 1,261.80 Woori Bank 2022~2025 126,180 USD 100,000 2.85% 3.60% 1,261.80 Woori Bank 2023~2028 259,000 USD 200,000 3.83% 4.88% 1,295.00 Korea Development Bank 2023~2028 129,500 USD 100,000 3.85% 4.88% 1,295.00 Bank of America 2023~2028 64,750 USD 50,000 3.85% 4.88% 1,295.00
Interest Rate Swap Contracts Which Are Not Designated As Hedge Instruments	(5) Interest rate swap contracts which are not designated as hedging instruments as of December 31, 2023 are as follows: Counterparty Contract Contract amount Contract interest rate per annum Pay Receive In millions of won and thousands of foreign currencies Nomura (*1) 2018~2038 ￦ 30,000 3M CD+0.10 3.75% Hana Bank 2019~2024 200,000 1.87% 3M CD+0.13% Shinhan Bank 2021~2025 100,000 2.32% 3M CD+0.43% Hana Bank 2022~2027 200,000 3.02% 3M CD+0.61% Hana Bank 2022~2027 200,000 3.04% 3M CD+0.58% Hana Bank 2022~2027 250,000 3.38% 3M CD+0.59% Nomura 2022~2027 200,000 3.55% 3M CD+0.60% Shinhan Bank 2022~2027 150,000 3.53% 3M CD+0.55% Hana Bank 2022~2027 200,000 3.70% 3M CD+0.59% Nomura 2022~2027 300,000 3.89% 3M CD+0.67% Hana Bank 2022~2027 200,000 3.93% 3M CD+0.67% Nomura 2022~2027 200,000 3.80% 3M CD+0.68% Nomura 2022~2027 300,000 4.04% 3M CD+0.60% Hana Bank 2022~2027 100,000 4.68% 3M CD+1.04% Hana Bank 2022~2027 100,000 5.45% 3M CD+1.20% Shinhan Bank 2023~2028 200,000 4.27% 3M CD+0.76% Shinhan Bank 2023~2028 50,000 4.27% 3M CD+0.76% Nomura 2023~2028 250,000 4.13% 3M CD+0.73% Hana Bank 2023~2028 200,000 3.74% 3M CD+0.51% Hana Bank 2023~2028 100,000 4.19% 3M CD+0.50% Shinhan Bank 2023~2028 300,000 3.81% 3M CD+0.70% Hana Bank 2023~2028 200,000 3.95% 3M CD+0.50% Nomura 2017~2032 52,457 2.55%+Floating rate 2.60% Nomura 2017~2032 59,423 2.57%+Floating rate 2.62% Nomura (*2) 2021~2041 30,000 1.84% 2.60% Nomura (*3) 2021~2041 50,000 1.87% 2.38% ANZ 2022~2025 AUD 865 0.48% 3.33% DBS Bank 2022~2025 AUD 865 0.48% 3.33% Societe Generale 2022~2025 AUD 865 0.48% 3.28% MUFG 2022~2048 USD 155,941 SOFR(3M) 3.71% Mizuho Bank 2022~2048 USD 155,941 SOFR(3M) 1.05% Mizuho Bank 2022~2024 USD 112,194 SOFR(1M) 1.80% Rabobank 2022~2036 USD 37,130 1.83% SOFR(6M) Mizuho Capital Markets LLC 2021~2045 USD 82,886 5.38% 1.14% (*1) Depending on the counterparty exercising the right, the contract may be early settled on the same date every year from June 15, 2023. (*2) 1.84% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+ 0.35 (*3) 1.87% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+0.35% is applied thereafter.
Interest Rate Swap Contracts Which Are Designated As Hedge Instruments	(6) Interest rate swap contracts which are designated as hedging instruments as of December 31, 2023 are as follows: Counterparty Contract Contract amount Contract interest rate per annum Pay Receive In thousands of USD Export-Import Bank of Korea 2015~2031 USD 15,893 2.67% 6M USD Libor ING Bank 2015~2031 USD  7,861 2.67% 6M USD Libor BNP Paribas 2015~2031 USD  7,861 2.67% 6M USD Libor BNP Paribas 2009~2027 USD 41,040 4.16% 6M USD Libor KFW 2009~2027 USD 41,040 4.16% 6M USD Libor Export-Import Bank of Korea 2016~2036 USD 60,977 3.00% 6M USD Libor
Disclosure of Gain Loss On Valuation And Transaction Derivatives	(7) Gain and loss on valuation and transaction of derivatives for the years ended December 31, 2021, 2022 and 2023 are as follows and included in finance income and expenses in the consolidated statements of comprehensive income or Net income effects of Net income effects of Other comprehensive 2021 2022 2023 2021 2022 2023 2021 2022 2023 In millions of won Currency forward ￦ 33,066 (20,570 ) 510 33,032 (2,710 ) 34,216 —  —  —  Currency swap 787,264 155,937 269,795 61,353 234,195 38,282 (59,108 ) (102,969 ) (11,411 ) - Trading 420,551 (77,618 ) 181,342 16,265 104,572 (1,244 ) —  —  —  - Hedging 366,713 233,555 88,453 45,088 129,623 39,526 (59,108 ) (102,969 ) (11,411 ) Interest rate swap 18,123 66,341 (16,377 ) (10,303 ) (6,800 ) 10,400 18,648 37,917 2,893 - Trading 18,123 66,341 (16,377 ) (10,303 ) (6,800 ) 10,400 —  —  —  - Hedging —  —  —  —  —  —  18,648 37,917 2,893 Other derivatives (15,459 ) 22,510 (19,729 ) —  —  6,761 —  —  —  ￦ 822,994 224,218 234,199 84,082 224,685 89,659 (40,460) (65,052) (8,518) (*) For the years ended December 31, 2021, 2022 and 2023, the net loss on valuation of derivatives applying cash flow hedge accounting , million and ￦ 3,654

Other Financial Assets (Tables)

Other Financial Assets (Tables)	12 Months Ended
	Dec. 31, 2023
Other Financial Assets [Abstract]
Summary of Other Financial Assets	(1) Other financial assets as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Loans ￦ 132,890 968,468 139,178 966,421 Less: Allowance for doubtful accounts (13 ) (54,824 ) (10 ) (80,783 ) Less: Present value discount (816 ) (32,334 ) (1,007 ) (35,468 ) 132,061 881,310 138,161 850,170 Long-term / short-term financial instruments 666,758 686,322 578,578 833,737 ￦ 798,819 1,567,632 716,739 1,683,907
Summary of Loans and Receivables	(2) Loans as of December 31, 2022 and 2023 are as follows: 2022 Face value Allowance for Present value Carrying value In millions of won Short-term loans Loans for tuition ￦ 30,261 —  (816 ) 29,445 Loans for housing 29,630 —  —  29,630 Other loans 72,999 (13 ) —  72,986 132,890 (13 ) (816 ) 132,061 Long-term loans Loans for tuition 436,131 (37,783 ) (32,334 ) 366,014 Loans for housing 309,446 —  —  309,446 Loans for related parties 187,728 (17,041 ) —  170,687 Other loans 35,163 —  —  35,163 968,468 (54,824 ) (32,334 ) 881,310 ￦ 1,101,358 (54,837 ) (33,150 ) 1,013,371 2023 Face value Allowance for Present value Carrying value In millions of won Short-term loans Loans for tuition ￦ 30,497 —  (1,007 ) 29,490 Loans for housing 35,560 —  —  35,560 Other loans 73,121 (10 ) —  73,111 139,178 (10 ) (1,007 ) 138,161 Long-term loans Loans for tuition 419,684 (24,745 ) (35,468 ) 359,471 Loans for housing 301,840 —  —  301,840 Loans for related parties 222,014 (43,640 ) —  178,374 Other loans 22,883 (12,398 ) —  10,485 966,421 (80,783 ) (35,468 ) 850,170 ￦ 1,105,599 (80,793 ) (36,475 ) 988,331
Summary of Changes in the Allowance for Doubtful Accounts of Loans and Receivables	(3) Changes in the allowance for doubtful accounts of loans for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Beginning balance ￦ 20,267 52,677 54,837 Bad debt expense 30,942 2,180 16,394 Other 1,468 (20 ) 9,562 Ending balance ￦ 52,677 54,837 80,793
Summary of Long-Term and Short-Term Financial Instruments	(4) Long-term and short-term financial instruments as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Time deposits ￦ 428,813 130,570 363,286 145,336 CD 30,000 —  —  —  Others 207,945 555,752 215,292 688,401 ￦ 666,758 686,322 578,578 833,737

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2023
Classes of current inventories [abstract]
Summary of Inventories	Inventories as of December 31, 2022 and 2023 are as follows: 2022 Acquisition cost Valuation allowance Book In millions of won Raw materials ￦ 4,522,171 (1,350 ) 4,520,821 Merchandises 1,001 —  1,001 Work-in-progress 172,089 (75 ) 172,014 Finished goods 52,642 (57 ) 52,585 Supplies 2,814,377 —  2,814,377 Inventories-in-transit 2,356,444 —  2,356,444 Other inventories 13,490 —  13,490 ￦ 9,932,214 (1,482 ) 9,930,732 2023 Acquisition cost Valuation allowance Book In millions of won Raw materials ￦ 4,624,638 (1,387 ) 4,623,251 Merchandises 335 —  335 Work-in-progress 187,304 —  187,304 Finished goods 97,272 (57 ) 97,215 Supplies 2,930,978 —  2,930,978 Inventories-in-transit 1,021,797 —  1,021,797 Other inventories 14,735 —  14,735 ￦ 8,877,059 (1,444 ) 8,875,615

Non-Financial Assets (Tables)

Non-Financial Assets (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure Of Other Assets [Abstract]
Summary of Non-Financial Assets	Non-financial assets as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Advanced payments ￦ 160,596 51,425 300,350 75,489 Prepaid expenses 366,532 153,830 440,079 214,022 Others (*) 1,217,741 103,879 368,892 60,659 ￦ 1,744,869 309,134 1,109,321 350,170 (*) Details of others as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Greenhouse gas emissions rights ￦ 192,005 —  25,246 —  Other quick assets 1,025,736 103,879 343,646 60,659 ￦ 1,217,741 103,879 368,892 60,659

Consolidated Subsidiaries (Tabl

Consolidated Subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of subsidiaries [abstract]
Summary of Consolidated Subsidiaries	(1) Consolidated subsidiaries as of December 31, 2022 and 2023 are as follows: Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   Korea Hydro & Nuclear Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea South-East Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea Midland Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea Western Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea Southern Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Korea East-West Power Co., Ltd. Power generation Korea 100.00 % 100.00 % KEPCO Engineering & Construction Company, Inc. (*1) Engineering and construction for utility plant and others Korea 65.77 % 51.00 % KEPCO Plant Service & Engineering Co., Ltd. Utility plant maintenance and others Korea 51.00 % 51.00 % KEPCO Nuclear Fuel Co., Ltd. Nuclear fuel Korea 96.36 % 96.36 % KEPCO KDN Co., Ltd. Electric power information technology and others Korea 100.00 % 100.00 % KEPCO International HongKong Ltd. Holding company Hong Kong 100.00 % 100.00 % KEPCO International Philippines Inc. Holding company Philippines 100.00 % 100.00 % KEPCO Gansu International Ltd. Holding company Hong Kong 100.00 % 100.00 % KEPCO Philippines Holdings Inc. Holding company Philippines 100.00 % 100.00 % KEPCO Philippines Corporation Operation of utility plant Philippines 100.00 % 100.00 % KEPCO Ilijan Corporation Construction and operation of utility plant Philippines 51.00 % 51.00 % KEPCO Lebanon SARL Operation of utility plant Lebanon 100.00 % —  KEPCO Neimenggu International Ltd. Holding company Hong Kong 100.00 % 100.00 % KEPCO Shanxi International Ltd. Holding company Hong Kong 100.00 % 100.00 % KOMIPO Global Pte Ltd. Holding company Singapore 100.00 % 100.00 % KEPCO Netherlands B.V. Holding company Netherlands 100.00 % 100.00 % KEPCO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOSEP Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOMIPO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOWEPO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOSPO Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % KEPCO Middle East Holding Company Holding company Bahrain 100.00 % 100.00 % Qatrana Electric Power Company Construction and operation of utility plant Jordan 80.00 % 80.00 % KHNP Canada Energy Ltd. Holding company Canada 100.00 % 100.00 % KEPCO Bylong Australia Pty., Ltd. Resources development Australia 100.00 % 100.00 % Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   Korea Waterbury Uranium Limited Partnership Resources development Canada 80.00 % 80.03 % KEPCO Holdings de Mexico Holding company Mexico 100.00 % 100.00 % KST Electric Power Company, S.A.P.I. de C.V. Construction and operation of utility plant Mexico 56.00 % 56.00 % KEPCO Energy Service Company Operation of utility plant Mexico 100.00 % 100.00 % KEPCO Netherlands S3 B.V. Holding company Netherlands 100.00 % 100.00 % PT. KOMIPO Pembangkitan Jawa Bali Operation of utility plant Indonesia 51.00 % 51.00 % PT. Cirebon Power Service (*2) Operation of utility plant Indonesia 27.50 % 27.50 % KOWEPO International Corporation Operation of utility plant Philippines 99.99 % 99.99 % KOSPO Jordan LLC Operation of utility plant Jordan 100.00 % 100.00 % EWP America Inc. Holding company USA 100.00 % 100.00 % EWP Renewable Corporation Holding company USA 100.00 % 100.00 % KNF Canada Energy Limited Holding company Canada 100.00 % 100.00 % EWP Barbados 1 SRL Holding company Barbados 100.00 % 100.00 % California Power Holdings, LLC Power generation USA 100.00 % 100.00 % Gyeonggi Green Energy Co., Ltd. Power generation Korea 62.01 % 62.01 % PT. Tanggamus Electric Power Power generation Indonesia 52.50 % 52.50 % Gyeongju Wind Power Co., Ltd. Power generation Korea 70.00 % 70.00 % KOMIPO America Inc. Holding company USA 100.00 % 100.00 % PT. EWP Indonesia Holding company Indonesia 99.96 % 99.96 % KEPCO Netherlands J3 B.V. Holding company Netherlands 100.00 % 100.00 % Korea Offshore Wind Power Co., Ltd. Power generation Korea 100.00 % 100.00 % Global One Pioneer B.V. Holding company Netherlands 100.00 % 100.00 % Global Energy Pioneer B.V. Holding company Netherlands 100.00 % 100.00 % Mira Power Limited (*3) Power generation Pakistan 76.00 % 76.00 % KOSEP Material Co., Ltd. Recycling fly ashes Korea 86.22 % 86.22 % Commerce and Industry Energy Co., Ltd. (*4) RDF power generation Korea 85.03 % 85.03 % KEPCO KPS Philippines Corp. Utility plant maintenance and others Philippines 99.99 % 99.99 % KOSPO Chile SpA Holding company Chile 100.00 % 100.00 % PT. KOWEPO Sumsel Operation And Maintenance Services Utility plant maintenance and others Indonesia 95.00 % 95.00 % Hee Mang Sunlight Power Co., Ltd. Operation of utility plant Korea 100.00 % 100.00 % Fujeij Wind Power Company Operation of utility plant Jordan 100.00 % 100.00 % KOSPO Youngnam Power Co., Ltd. Operation of utility plant Korea 50.00 % 100.00 % Chitose Solar Power Plant LLC Power generation Japan 65.00 % 65.00 % KEPCO Energy Solution Co., Ltd. Energy service Korea 100.00 % 100.00 % KEPCO Solar Co., Ltd. Power generation Korea 100.00 % 100.00 % KOSPO Power Services Ltda. Utility plant maintenance and others Chile 65.00 % 65.00 % Energy New Industry Specialized Investment Private Investment Trust Holding company Korea 99.01 % 99.01 % KOEN Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOMIPO Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOWEPO Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOSPO Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % EWP Bylong Pty., Ltd. Resources development Australia 100.00 % 100.00 % KOWEPO Lao International Utility plant maintenance and others Laos 100.00 % 100.00 % KEPCO US Inc. Holding company USA 100.00 % —  KEPCO Mangilao Holdings LLC Holding company USA 100.00 % 100.00 % Mangilao Investment LLC Holding company USA 80.06 % 80.06 % KEPCO Mangilao Solar, LLC Power generation USA 100.00 % 100.00 % Jeju Hanlim Offshore Wind Co., Ltd. Power generation Korea 79.03 % 79.03 % PT. Siborpa Eco Power Construction and operation of utility plant Indonesia 55.00 % 55.00 % BSK E-New Industry Fund VII Holding company Korea 81.67 % 81.67 % e-New Industry LB Fund 1 Holding company Korea 76.11 % 76.11 % Songhyun e-New Industry Fund Holding company Korea 80.65 % 80.65 % BSK E-New Industry Fund X Holding company Korea 66.80 % 66.80 % PT. Korea Energy Indonesia Utility plant maintenance and others Indonesia 95.00 % 95.00 % KOLAT SpA Utility plant maintenance and others Chile 100.00 % 100.00 % KEPCO California, LLC Holding company USA 100.00 % 100.00 % KEPCO Mojave Holdings, LLC Holding company USA 100.00 % 100.00 % Incheon Fuel Cell Co., Ltd. Power generation Korea 60.00 % 60.00 % Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   KOEN Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOMIPO Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOWEPO Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOSPO Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % EWP Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % PT. KOMIPO Energy Indonesia Utility plant maintenance and others Indonesia 95.00 % 95.00 % KNF Partners Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOSPO USA Inc. Holding company USA 100.00 % 100.00 % Nambu USA LLC Holding company USA 100.00 % 100.00 % Tamra Offshore Wind Power Co., Ltd. Power generation Korea 63.00 % 63.00 % KEPCO MCS Co., Ltd. Electric meter reading and others Korea 100.00 % 100.00 % KEPCO FMS Co., Ltd. Security service and others Korea 100.00 % 100.00 % Firstkeepers Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % Secutec Co., Ltd. Security service Korea 100.00 % 100.00 % SE Green Energy Co., Ltd. Power generation Korea 84.80 % 84.80 % Mangilao Intermediate Holdings LLC Holding company USA 100.00 % 100.00 % KEPCO CSC Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KOAK Power Limited Hydro power facility maintenance Pakistan 100.00 % 100.00 % KOMIPO Europe B.V. Holding company Netherlands 100.00 % 100.00 % Haenanum Energy Fund Holding company Korea 99.64 % 99.64 % Paju Ecoenergy Co., Ltd. Power generation Korea 89.00 % 89.00 % Guam Ukudu Power LLC Power generation USA 100.00 % 100.00 % K-SOLAR SHINAN Co., Ltd. Power generation Korea 90.00 % 90.00 % KPS Partners Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % KEPCO E&C Service Co., Ltd. Facility maintenance and service Korea 100.00 % 100.00 % Moha solar Co., Ltd. Power generation Korea 100.00 % 100.00 % Ogiri Solar Power Co., Ltd. Power generation Korea 70.00 % 70.00 % KHNP USA LLC Holding company USA 100.00 % 100.00 % KOMIPO Vanphong Power Service LLC Utility plant maintenance and others Vietnam 100.00 % 100.00 % Energy Innovation Fund I Holding company Korea 71.91 % 71.91 % KHNP Chile SpA Holding company Chile 100.00 % 100.00 % Yeong Yang Apollon Photovoltaic Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Corporation Co., Ltd. Power generation Korea 100.00 % 100.00 % SolarVader Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Innovation Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Horus Photovoltaic Co., Ltd. Power generation Korea 100.00 % 100.00 % Yeong Yang Solar Management Co., Ltd. Power generation Korea 100.00 % 100.00 % LSG Hydro Power Limited Holding company Pakistan 99.80 % 99.80 % KOEN Bio Co., Ltd. Wood pellet utilization business Korea 70.00 % 70.00 % KOMIPO Energy Solution America, LLC Holding company USA 100.00 % 100.00 % Elara Investment Holdings, LLC (*5) Holding company USA 0.10 % 0.10 % Elara Equity Holdings, LLC Holding company USA 54.00 % 54.00 % Elara Class B Holdings, LLC Holding company USA 100.00 % 100.00 % Elara Class B Member, LLC Holding company USA 100.00 % 100.00 % Elara Development Holdings, LLC Holding company USA 100.00 % 100.00 % KOMIPO Development, LLC Holding company USA 100.00 % 100.00 % Elara Energy Holdings, LLC (*5) Holding company USA 43.94 % 43.94 % Elara Energy Project, LLC Power generation USA 100.00 % 100.00 % KOMIPO Iberian Solar Group, S.L.U. Holding company Spain 100.00 % 100.00 % Jeongam Wind Power Co., Ltd. Power generation Korea 80.00 % 80.00 % KOWEPO Europe B.V. Holding company Netherlands 100.00 % 100.00 % CVS Equity Holdings, LLC Holding company USA 81.34 % 81.34 % CVS Class B Holdings, LLC Holding company USA 100.00 % 100.00 % CVS Development Holdings, LLC Holding company USA 100.00 % 100.00 % CVS Development, LLC Holding company USA 100.00 % 100.00 % CVS Class B Member, LLC Holding company USA 100.00 % 100.00 % CVS Energy Holdings, LLC Holding company USA 70.79 % 70.79 % Concho Valley Energy, LLC Holding company USA 100.00 % 100.00 % Percentage of ownership (%) Subsidiaries Key operation activities Location   2022     2023   Concho Valley Solar, LLC Power generation USA 100.00 % 100.00 % Yeongdeok Sunrise Wind Power Co., Ltd. Power generation Korea 70.00 % 70.00 % KHNP Spain, S.L. Holding company Spain 100.00 % —  UI Carbon-Neutrality Fund Holding company Korea 78.97 % 78.97 % KA Power Limited Power generation Pakistan 100.00 % 100.00 % Western Power Changgi Solar Co., Ltd. Power generation Korea 100.00 % 100.00 % EWP Australia Pty., Ltd. Holding company Australia 100.00 % 100.00 % Columboola Solar Farm Hold Co Pty., Ltd. (*3,6) Holding company Australia 74.04 % 74.04 % Digital Innovation Growth Fund Holding company Korea 76.92 % 76.92 % J Wind First, LLC (*7) Company specializing in liquidization Korea —  —  KEPCO Holding Company Holding company Saudi Arabia 100.00 % 100.00 % KEPCO for Power Company Power generation Saudi Arabia 60.00 % —  KEPCO for Maintenance Company Utility plant maintenance and others Saudi Arabia 100.00 % 100.00 % KOSPO Trumbull LLC Holding company USA 100.00 % 100.00 % Changjuk Wind Power Co., Ltd. Power generation Korea 73.00 % 73.00 % Chile Solar JV SpA Power generation Chile —  100.00 % KEPCO KPS South Africa Pty., Ltd. Utility plant maintenance and others Republic of South Africa —  100.00 % KOWEPO Holding Limited Holding company United Arab —  100.00 % Magna Energy New Industrial Fund Holding company Korea —  82.00 % Columboola Solar Farm Nominees Pty., Ltd. (*3) Power generation Australia —  100.00 % Columboola Solar Farm Op Trust (*3) Power generation Australia —  100.00 % Columboola Solar Farm Fin Co Pty., Ltd. (*3) Holding company Australia —  100.00 % EWP ESS Holdings, LLC Holding company USA —  100.00 % Fairhaven ESS LLC Holding company USA —  100.00 % (*1) Considering treasury stocks, the effective ownership interest (*2) The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company obtained the majority of the voting power under the shareholders’ agreement. (*3) As of December 31, 2023, the annual reporting period of all subsidiaries ends on December 31, except for (*4) The Company guarantees a certain return on investments in Commerce and Industry Energy Co., Ltd. for the financial investors holding such investments. The financial investors have a right to claim the Company to sell its shares in the entity, which can be exercised 36 months after the date of acquisition. Accordingly, the purchase price including the return on investment is classified as a borrowing. (*5) The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company has control over the board of directors under the shareholders' agreement. (*6) Excluding preferred stocks, the percentage of ownership with voting rights is 100%. (*7) Although the Company does not hold a stake as of December 31, 2023, considering the purpose and design of the structured entity, the Company is exposed to volatility in the profits of the structured entity. In addition, Company has the ability to direct activities that can most significantly affect the operations of the structured entity, so it has been determined that the Company has control over the entity.
Summary of Subsidiaries Newly Included in or Excluded from Consolidation	(2) Subsidiaries newly included in and excluded from consolidation for the year ended December 31, 2023 are as follows: Subsidiaries included in consolidation during the year ended December 31, 2023. Subsidiaries Reason Chile Solar JV SpA Change in the scope of consolidation KEPCO KPS South Africa Pty., Ltd. New investment KOWEPO Holding Limited New investment Magna Energy New Industrial Fund New investment Columboola Solar Farm Nominees Pty., Ltd. New investment Columboola Solar Farm Op Trust New investment Columboola Solar Farm Fin Co Pty., Ltd. New investment EWP ESS Holdings, LLC New investment Fairhaven ESS LLC New investment Subsidiaries excluded from consolidation during the year ended December 31, 2023. Subsidiaries Reason KHNP Spain, S.L. Liquidation KEPCO for Power Company Change in the scope of consolidation KEPCO Lebanon SARL Under liquidation process KEPCO US Inc. Liquidation
Summary of Financial Information of Consolidated Subsidiaries	(3) Summary of financial information of consolidated subsidiaries as of and for the years ended December 31, 2022 and 2023 are as follows: 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won Korea Hydro & Nuclear Power Co., Ltd. ￦ 69,129,625 42,843,974 10,386,091 (16,382 ) Korea South-East Power Co., Ltd. 13,855,071 7,410,881 8,972,991 71,662 Korea Midland Power Co., Ltd. 16,062,605 10,776,943 8,629,165 (58,173 ) Korea Western Power Co., Ltd. 13,459,054 8,125,312 8,112,727 106,361 Korea Southern Power Co., Ltd. 14,011,354 8,296,983 9,304,362 (68,315 ) Korea East-West Power Co., Ltd. 12,079,954 5,818,789 6,925,094 2,888 KEPCO Engineering & Construction Company, Inc. 815,533 272,119 505,291 17,954 KEPCO Plant Service & Engineering Co., Ltd. 1,555,453 344,702 1,425,913 97,881 KEPCO Nuclear Fuel Co., Ltd. 949,455 490,215 304,405 31,508 KEPCO KDN Co., Ltd. 734,439 166,272 739,453 42,584 KEPCO International HongKong Ltd. 128,784 —  —  (216 ) KEPCO International Philippines Inc. 127,744 101 —  9,976 KEPCO Gansu International Ltd. 7,125 598 —  (22 ) KEPCO Philippines Holdings Inc. 191,634 129 —  39,346 KEPCO Philippines Corporation 3,799 14 —  102 KEPCO Ilijan Corporation 231,132 3,642 23,263 16,455 KEPCO Lebanon SARL 1,890 10,482 —  20 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won KEPCO Neimenggu International Ltd. ￦ 269,582 3,917 —  9,938 KEPCO Shanxi International Ltd. 597,635 222,186 —  (11,312 ) KOMIPO Global Pte Ltd. 388,071 1,817 —  58,030 KEPCO Netherlands B.V. 137,454 64 —  8,570 KEPCO Australia Pty., Ltd. 579 11 —  102 KOSEP Australia Pty., Ltd. 74,180 13,097 52,271 24,443 KOMIPO Australia Pty., Ltd. 81,216 10,327 52,272 23,368 KOWEPO Australia Pty., Ltd. 81,696 10,184 52,271 22,745 KOSPO Australia Pty., Ltd. 41,872 10,174 52,271 24,362 KEPCO Middle East Holding Company 116,731 102,054 —  (634 ) Qatrana Electric Power Company 513,277 247,027 24,354 22,578 KHNP Canada Energy Ltd. 107,200 6,218 —  149 KEPCO Bylong Australia Pty., Ltd. 44,034 437,852 —  (45,880 ) Korea Waterbury Uranium Limited Partnership 20,934 224 —  (116 ) KEPCO Holdings de Mexico 728 1,974 —  (1,363 ) KST Electric Power Company, S.A.P.I. de C.V. 653,830 528,315 232,893 23,122 KEPCO Energy Service Company 2,238 2,173 7,015 (211 ) KEPCO Netherlands S3 B.V. 71,326 16,419 —  4,465 PT. KOMIPO Pembangkitan Jawa Bali 15,753 3,232 22,488 3,668 PT. Cirebon Power Service 2,316 784 9,602 355 KOWEPO International Corporation —  10 —  —  KOSPO Jordan LLC 22,854 6,964 45,009 7,657 EWP America Inc. (*1) 47,775 2,595 21,717 4,337 KNF Canada Energy Limited 2,116 34 —  (59 ) EWP Barbados 1 SRL 395,067 901 3,230 34,260 Gyeonggi Green Energy Co., Ltd. 220,414 226,517 112,524 (26,004 ) PT. Tanggamus Electric Power 227,638 163,106 3,781 5,778 Gyeongju Wind Power Co., Ltd. 98,513 55,579 24,888 9,711 KOMIPO America Inc. (*2) 571,200 317,903 34,059 (3,293 ) PT. EWP Indonesia 93,390 5 —  4,100 KEPCO Netherlands J3 B.V. 135,213 63 —  19,396 Korea Offshore Wind Power Co., Ltd. 376,449 192,335 52,526 13,083 Global One Pioneer B.V. 135 41 —  (68 ) Global Energy Pioneer B.V. 320 40 —  (64 ) Mira Power Limited 416,750 310,529 57,135 12,394 KOSEP Material Co., Ltd. 3,985 662 4,589 775 Commerce and Industry Energy Co., Ltd. 79,172 32,147 31,068 (3,730 ) KEPCO KPS Philippines Corp. 5,294 600 5,232 1,004 KOSPO Chile SpA 159,500 70,037 —  (2,811 ) PT. KOWEPO Sumsel Operation And Maintenance Services 25 252 —  (94 ) Hee Mang Sunlight Power Co., Ltd. 5,877 2,606 862 304 Fujeij Wind Power Company 213,113 163,690 —  16,564 KOSPO Youngnam Power Co., Ltd. 425,000 312,831 568,224 10,878 Chitose Solar Power Plant LLC 109,964 94,366 14,384 1,615 KEPCO Energy Solution Co., Ltd. 317,392 6,147 33,638 138 KEPCO Solar Co., Ltd. 243,221 25,405 24,778 9,305 KOSPO Power Services Ltda. 6,722 4,762 17,911 (358 ) Energy New Industry Specialized Investment Private Investment Trust (*3) 451,762 4,338 24,725 7,093 KOEN Bylong Pty., Ltd. 11 119 —  (12 ) KOMIPO Bylong Pty., Ltd. 11 122 —  (33 ) KOWEPO Bylong Pty., Ltd. 8 94 —  (7 ) KOSPO Bylong Pty., Ltd. 25 148 —  (17 ) 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won EWP Bylong Pty., Ltd. ￦ 8 54 —  1 KOWEPO Lao International 8,248 87 10,010 11,185 KEPCO US Inc. 91 —  —  (19,181 ) KEPCO Mangilao Holdings LLC 112,948 40,558 21,743 21,166 Mangilao Investment LLC 258,674 4 —  (1 ) KEPCO Mangilao Solar, LLC 240,736 373 8,870 (14,818 ) Jeju Hanlim Offshore Wind Co., Ltd. 185,357 111,343 —  (3,546 ) PT. Siborpa Eco Power 12,050 3 —  (39 ) PT. Korea Energy Indonesia 1,675 80 1,937 (104 ) KOLAT SpA 48,787 3,701 1,647 1,888 KEPCO California, LLC 46,151 4,768 596 (670 ) KEPCO Mojave Holdings, LLC 95,550 75,846 —  (4,705 ) Incheon Fuel Cell Co., Ltd. 268,063 242,176 107,193 (5,323 ) KOEN Service Co., Ltd. 9,353 7,035 36,340 356 KOMIPO Service Co., Ltd. 6,597 4,503 35,031 905 KOWEPO Service Co., Ltd. 6,266 3,130 34,031 171 KOSPO Service Co., Ltd. 6,672 5,048 28,321 60 EWP Service Co., Ltd. 3,756 2,507 24,526 581 PT. KOMIPO Energy Indonesia 2,978 368 1,698 83 KNF partners Co., Ltd. 2,285 1,053 5,997 293 KOSPO USA Inc. 315,018 430 —  5,024 Nambu USA LLC 297,516 —  —  670 Tamra Offshore Wind Power Co., Ltd. 133,598 93,639 18,332 5,316 KEPCO MCS Co., Ltd. 114,316 52,241 363,627 8,468 KEPCO FMS Co., Ltd. 16,852 11,667 105,339 2,176 Firstkeepers Co., Ltd. 16,448 12,912 84,620 2,482 Secutec Co., Ltd. 12,578 9,209 69,383 690 SE Green Energy Co., Ltd. 149,189 114,241 49,873 1,304 Mangilao Intermediate Holdings LLC 236,266 116,426 —  (4,709 ) KEPCO CSC Co., Ltd. 10,668 8,937 46,559 (2,134 ) KOAK Power Limited 12,626 839 —  49 KOMIPO Europe B.V. 81,364 54 1,195 1,134 Haenanum Energy Fund 7,416 3 —  (48 ) Paju Ecoenergy Co., Ltd. 61,930 3,066 20,718 1,290 Guam Ukudu Power LLC 293,422 323,292 —  (31,410 ) K-SOLAR SHINAN Co., Ltd. 320,227 296,141 16,980 3,690 KPS Partners Co., Ltd. 3,619 2,007 12,417 487 KEPCO E&C Service Co., Ltd. 5,676 1,897 16,180 1,493 Moha solar Co., Ltd. 29,096 31,359 169 (1,137 ) Ogiri Solar Power Co., Ltd. 1,033 23 —  (30 ) KHNP USA LLC 1,290 97 1,127 392 KOMIPO Vanphong Power Service LLC 15,940 3,333 20,233 9,871 Energy Innovation Fund I 35,310 445 —  (961 ) KHNP Chile SpA 5,547 4,147 —  (16 ) Yeong Yang Apollon Photovoltaic Co., Ltd. 1,566 1,507 254 (82 ) Yeong Yang Corporation Co., Ltd. 1,559 1,497 251 (91 ) SolarVader Co., Ltd. 1,568 1,500 256 (78 ) Yeong Yang Innovation Co., Ltd. 1,557 1,497 244 (91 ) Yeong Yang Horus Photovoltaic Co., Ltd. 1,552 1,498 243 (93 ) Yeong Yang Solar Management Co., Ltd. 1,573 1,500 262 (75 ) 2022 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the year In millions of won LSG Hydro Power Limited ￦ 1,144 1,159 —  (18 ) KOEN Bio Co., Ltd. 261 219 639 (150 ) KOMIPO Iberian Solar Group, S.L.U. 78,094 65,012 —  (1,304 ) Jeongam Wind Power Co., Ltd. 81,800 68,317 10,722 892 KOWEPO Europe B.V. 42,865 2,422 —  1,668 Yeongdeok Sunrise Wind Power Co., Ltd. 42,187 22,031 —  (328 ) KHNP Spain, S.L. 3 —  —  (1 ) KA Power Limited 3,937 418 —  442 Western Power Changgi Solar Co., Ltd. 48,770 44,647 3,447 (354 ) EWP Australia Pty., Ltd. 51,105 —  —  15,203 Columboola Solar Farm Hold Co Pty., Ltd. 310,271 214,792 2,228 2,884 Digital Innovation Growth Fund 12,594 100 —  (363 ) J Wind First, LLC 33,611 33,611 450 —  KEPCO Holding Company 3,273 17 —  (18 ) KEPCO for Power Company 57,501 58,441 —  (960 ) KEPCO for Maintenance Company —  —  —  —  KOSPO Trumbull LLC 37 3 —  —  Changjuk Wind Power Co., Ltd. 29,208 3,137 9,027 3,503 (*1) Financial information of EWP America Inc. includes that of two other subsidiaries, EWP Renewable Corporation, and California Power Holdings, LLC. (*2) Financial information of KOMIPO America Inc. includes that of 17 other subsidiaries including Elara Equity Holdings, LLC and CVS Equity Holdings, LLC. (*3) Financial information of Energy New Industry Specialized Investment Private Investment Trust includes that of five other subsidiaries, BSK E-New Industry Fund VII, e-New Industry LB Fund 1, Songhyun e-New Industry Fund, BSK E-New Industry Fund X, and UI Carbon-Neutrality Fund. 2023 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the period In millions of won Korea Hydro & Nuclear Power Co., Ltd. ￦ 70,535,018 45,660,916 10,798,378 151,638 Korea South-East Power Co., Ltd. 13,158,245 6,964,695 7,761,713 196,522 Korea Midland Power Co., Ltd. 15,309,205 10,368,698 7,611,821 (1,844 ) Korea Western Power Co., Ltd. 12,710,246 7,648,441 6,915,233 126,519 Korea Southern Power Co., Ltd. 13,405,076 7,807,334 7,298,989 226,811 Korea East-West Power Co., Ltd. 11,683,112 5,626,034 5,571,885 139,013 KEPCO Engineering & Construction Company, Inc. 854,704 307,396 545,092 32,654 KEPCO Plant Service & Engineering Co., Ltd. 1,585,380 318,597 1,523,031 161,849 KEPCO Nuclear Fuel Co., Ltd. 1,101,960 622,157 284,066 43,533 KEPCO KDN Co., Ltd. 733,434 301,713 738,833 65,495 KEPCO International HongKong Ltd. 133,915 —  —  8,795 KEPCO International Philippines Inc. 72,830 —  —  4,891 KEPCO Gansu International Ltd. 7,226 608 —  (23 ) KEPCO Philippines Holdings Inc. 180,592 96 —  8,802 KEPCO Philippines Corporation 2,607 —  —  127 KEPCO Ilijan Corporation 142,711 800 —  3,718 KEPCO Neimenggu International Ltd. 284,280 4,346 —  15,021 KEPCO Shanxi International Ltd. 707,447 329,539 —  (3,875 ) KOMIPO Global Pte Ltd. 411,249 32,900 —  17,174 KEPCO Netherlands B.V. 141,088 45 —  3,856 KEPCO Australia Pty., Ltd. 749 34 —  131 KOSEP Australia Pty., Ltd. 79,308 7,990 29,675 10,665 KOMIPO Australia Pty., Ltd. 86,077 4,014 29,676 9,248 KOWEPO Australia Pty., Ltd. 86,074 3,571 29,675 9,001 KOSPO Australia Pty., Ltd. 32,828 3,923 29,675 10,329 KEPCO Middle East Holding Company 121,015 107,611 —  (1,548 ) Qatrana Electric Power Company 491,627 208,707 26,779 20,949 KHNP Canada Energy Ltd. 155,242 12,379 —  392 KEPCO Bylong Australia Pty., Ltd. 44,557 465,231 —  (16,669 ) Korea Waterbury Uranium Limited Partnership 20,772 44 —  (67 ) KEPCO Holdings de Mexico 1,171 2,621 —  (121 ) KST Electric Power Company, S.A.P.I. de C.V. 631,348 490,470 93,843 19,657 KEPCO Energy Service Company 2,028 716 10,193 251 KEPCO Netherlands S3 B.V. 70,613 16,710 —  1,769 PT. KOMIPO Pembangkitan Jawa Bali 17,303 3,929 23,639 1,579 PT. Cirebon Power Service 2,936 714 9,457 672 KOWEPO International Corporation —  10 —  —  KOSPO Jordan LLC 19,387 3,881 17,665 7,082 EWP America Inc. (*1) 46,954 4,032 14,549 895 KNF Canada Energy Limited 2,261 34 —  (56 ) EWP Barbados 1 SRL 434,690 14,217 2,448 36,566 Gyeonggi Green Energy Co., Ltd. 180,176 214,822 80,630 (28,549 ) PT. Tanggamus Electric Power 214,892 150,483 2,127 (2,230 ) Gyeongju Wind Power Co., Ltd. 90,616 49,982 19,807 6,716 KOMIPO America Inc. (*2) 579,403 318,295 39,323 3,376 PT. EWP Indonesia 90,650 132 —  9,590 KEPCO Netherlands J3 B.V. 153,324 13,634 —  15,289 Korea Offshore Wind Power Co., Ltd. 334,444 143,827 40,313 6,497 2023 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the period In millions of won Global One Pioneer B.V. ￦ 143 44 —  (85 ) Global Energy Pioneer B.V. 336 44 —  (81 ) Mira Power Limited 403,843 318,557 2,683 (1,590 ) KOSEP Material Co., Ltd. 4,974 542 4,834 908 Commerce and Industry Energy Co., Ltd. 73,671 29,611 33,050 (2,901 ) KEPCO KPS Philippines Corp. 5,775 884 4,608 97 KOSPO Chile SpA 166,643 75,619 —  —  PT. KOWEPO Sumsel Operation And Maintenance Services 26 260 —  —  Hee Mang Sunlight Power Co., Ltd. 5,877 2,403 689 202 Fujeij Wind Power Company 216,082 158,081 —  15,067 KOSPO Youngnam Power Co., Ltd. 360,026 255,761 410,173 (7,965 ) Chitose Solar Power Plant LLC 98,911 84,228 14,447 2,059 KEPCO Energy Solution Co., Ltd. 322,529 15,367 14,151 5,384 KEPCO Solar Co., Ltd. 246,273 36,127 23,234 8,367 KOSPO Power Services Ltd. 6,976 7,086 17,634 (211 ) Energy New Industry Specialized Investment Private Investment Trust (*3) 454,888 3,364 24,030 10,812 KOEN Bylong Pty., Ltd. 11 128 —  —  KOMIPO Bylong Pty., Ltd. 13 147 —  (20 ) KOWEPO Bylong Pty., Ltd. 12 142 —  (43 ) KOSPO Bylong Pty., Ltd. 388 541 —  (20 ) EWP Bylong Pty., Ltd. 13 13 —  46 KOWEPO Lao International 13,038 223 10,270 6,268 KEPCO Mangilao Holdings LLC 90,445 41,898 775 785 Mangilao Investment LLC 206,714 15 —  (1 ) KEPCO Mangilao Solar, LLC 206,600 1,918 13,593 826 Jeju Hanlim Offshore Wind Co., Ltd. 459,229 388,171 —  (3,032 ) PT. Siborpa Eco Power 12,209 3 —  (52 ) PT. Korea Energy Indonesia 1,878 101 1,897 132 KOLAT SpA 46,958 352 2,237 1,820 KEPCO California, LLC 46,606 6,823 613 (385 ) KEPCO Mojave Holdings, LLC 93,233 78,328 —  (3,901 ) Incheon Fuel Cell Co., Ltd. 259,169 237,409 96,924 (4,112 ) KOEN Service Co., Ltd. 11,470 8,745 38,164 305 KOMIPO Service Co., Ltd. 7,944 4,777 37,525 960 KOWEPO Service Co., Ltd. 10,300 6,584 36,421 264 KOSPO Service Co., Ltd. 6,122 4,182 30,369 703 EWP Service Co., Ltd. 5,487 3,790 26,767 176 PT. KOMIPO Energy Indonesia 2,983 250 2,023 38 KNF partners Co., Ltd. 2,589 1,106 6,380 340 KOSPO USA Inc. 378,732 377 —  (6,351 ) Nambu USA LLC 297,370 230 —  (732 ) Tamra Offshore Wind Power Co., Ltd. 120,460 83,161 18,570 1,089 KEPCO MCS Co., Ltd. 111,189 73,940 307,146 (4,757 ) KEPCO FMS Co., Ltd. 21,310 18,142 107,336 1,895 Firstkeepers Co., Ltd. 18,698 12,437 90,575 2,689 Secutec Co., Ltd. 16,038 11,797 72,284 699 SE Green Energy Co., Ltd. 147,251 114,737 40,326 (1,305 ) Mangilao Intermediate Holdings LLC 206,771 114,954 —  (5,293 ) KEPCO CSC Co., Ltd. 15,985 12,170 49,502 2,644 KOAK Power Limited 15,000 528 —  714 KOMIPO Europe B.V. 86,109 69 1,183 109 2023 Subsidiaries Total assets Total liabilities Sales Profit (loss) for the period In millions of won Haenanum Energy Fund ￦ 7,415 3 47 (1 ) Paju Ecoenergy Co., Ltd. 60,653 2,146 15,351 (357 ) Guam Ukudu Power LLC 749,837 720,795 —  (19,904 ) K-SOLAR 298,866 281,676 37,137 (6,896 ) KPS Partners Co., Ltd. 3,503 1,776 12,921 183 KEPCO E&C Service Co., Ltd. 7,167 1,938 16,454 1,505 Moha solar Co., Ltd. 27,213 29,363 —  112 Ogiri Solar Power Co., Ltd. 1,032 31 —  (9 ) KHNP USA LLC 1,517 140 1,142 166 KOMIPO Vanphong Power Service LLC 26,819 3,768 21,396 10,879 Energy Innovation Fund I 43,725 419 —  (766 ) KHNP Chile SpA 5,555 4,219 —  (66 ) Yeong Yang Apollon Photovoltaic Co., Ltd. 1,529 1,427 219 42 Yeong Yang Corporation Co., Ltd. 1,519 1,418 216 39 SolarVader Co., Ltd. 1,529 1,421 219 40 Yeong Yang Innovation Co., Ltd. 1,510 1,418 210 32 Yeong Yang Horus Photovoltaic Co., Ltd. 1,502 1,418 206 28 Yeong Yang Solar Management Co., Ltd. 1,540 1,420 224 46 LSG Hydro Power Limited 717 8 —  (219 ) KOEN Bio Co., Ltd. 1,010 585 2,467 372 KOMIPO Iberian Solar Group, S.L.U. 79,666 66,874 —  (931 ) Jeongam Wind Power Co., Ltd. 75,744 63,219 8,154 (958 ) KOWEPO Europe B.V. 107 3,177 —  (44,685 ) Yeongdeok Sunrise Wind Power Co., Ltd. 94,615 74,842 —  (383 ) KA Power Limited 3,173 172 —  126 Western Power Changgi Solar Co., Ltd. 46,950 40,815 7,036 2,011 EWP Australia Pty., Ltd. 52,734 —  325 337 Columboola Solar Farm Hold Co Pty., Ltd. (*4) 311,259 213,822 10,072 3,217 Digital Innovation Growth Fund 11,624 96 —  (266 ) J Wind First, LLC 52,304 52,304 2,540 —  KEPCO Holding Company 3,307 —  —  (23 ) KEPCO for Maintenance Company 118 —  —  (45 ) KOSPO Trumbull LLC 25 —  —  (10 ) Changjuk Wind Power Co., Ltd. 24,364 3,049 6,230 744 Chile Solar JV SpA 98,705 75,472 9,050 (2,768 ) KEPCO KPS South Africa Pty., Ltd. 9,222 4,236 8,512 834 KOWEPO Holding Limited 1,323 1,371 —  (49 ) (*1) Financial information of EWP America Inc. includes that of 4 other subsidiaries, EWP Renewable Corporation, and California Power Holdings LLC, EWP ESS Holdings, LLC, and Fairhaven ESS LLC. (*2) Financial information of KOMIPO America Inc. includes that of 17 other subsidiaries including Elara Equity Holdings, LLC and CVS Equity Holdings, LLC. (*3) Financial information of Energy New Industry Specialized Investment Private Investment Trust includes that of 6 other subsidiaries, BSK E-New e-New e-New E-New (*4) Financial information of Columboola Solar Farm Hold Co Pty., Ltd. includes that of 3 other subsidiaries including Columboola Solar Farm Nominees Pty., Ltd.
Summary of Significant Restrictions on Abilities to Subsidiaries	(4) Significant restrictions on abilities to subsidiaries are as follows: Company Nature and extent of any significant restrictions Gyeonggi Green Energy Co., Ltd. Acquisition or disposal of assets of more than W KOSPO Youngnam Power Co., Ltd. Dividends may be payable Jeongam Wind Power Co., Ltd. Dividends may be payable when Incheon Fuel Cell Co., Ltd. Acquisition or disposal of assets of more than W Gyeongju Wind Power Co., Ltd. Dividends and settlement amounts for O&M and renewable energy certificate may be payable Korea Offshore Wind Power Co., Ltd. Principals and interest on subordinated loans or dividends and settlement amounts for renewable energy certificate may be payable interest may Jeju Hanlim Offshore Wind Co., Ltd. Prior approval from the lender is required when withdrawing funds (major expenditure, REC settlement, dividend payment, etc.) according to the loan agreement. Yeongdeok Sunrise Wind Power Co., Ltd. Dividends may be pay able Columboola Solar Farm Hold Co Pty., Ltd. Dividends may be payable Guam Ukudu Power LLC Dividends may be payable equity interest may KOSPO Trumbull LLC The Company’s equity interest may not Mira Power Limited The Company’s equity interest may Chile Solar JV SpA The Company’s equity interest may Company Nature and extent of any significant restrictions K-SOLAR Dividends may be payable only when all conditions of the loan agreement are satisfied. The Company’s equity interest may not be transferred either wholly or partially without prior consent of other stakeholders until five years have elapsed after the commencement of the operation. Western Power Changgi Solar Co., Ltd. Principals and interest on subordinated loans or dividends to investors are only payable when all conditions of the loan agreement are satisfied, and prior written consent of financial institutions is obtained. Also, the Company’s equity interest may not be transferred either wholly or partially without prior written consent of financial institutions. Chitose Solar Power Plant LLC Capital expenditure may be incurred only upon prior consent of financial institutions. The issuance of securities to third parties, including current investors, is restricted, and the amount of paid-in capital cannot either increase, be written off or decrease. Mangilao Intermediate Holdings LLC Changes or termination of the O&M contract, and delays in the EPC contract may not be made without the prior written consent of the majority of the lenders, and dividends can be implemented only after repayment of the loan is completed. Fujeij Wind Power Company Incurring additional borrowings not specified in the loan agreement, or changing the PPA schedule or the EPC contract without the lender’s prior written consent is restricted. Also, commercial operation before acquiring wind turbine is restricted without prior consent from the EPC contractor. In addition, capital acquisition and new share issuance other than dividends payment to investors are restricted. Qatrana Electric Power Company Dividends payment, repayment of capital investment, and settlement for O&M can only be made when all conditions of the loan agreement are satisfied and prior consent of financial institutions is obtained. KST Electric Power Company, S.A.P.I. de C.V. Disposal of assets exceeding $5 million per year is restricted, and the debt ratio is required to be maintained below 90%. Additionally, capital and cost expenditures that do not meet the conditions in the loan agreement are restricted.
Summary of Entitlements in Relation to Subsidiaries as per Shareholder Agreements	(5) As of December 31, 2023, the Company has following entitlements in relation to its subsidiaries as per its shareholder’s agreements: Company Unrecognized Commitments Jeongam Wind Power Co., Ltd. When the Company requests other shareholders to transfer shares after the completion of the power generation complex, the Company has a right to purchase the shares at fair value. Changjuk Wind Power Co., Ltd. When other shareholders want to sell their shares after the performance guarantee period of wind power generators stipulated in the equipment supply contract is completed, the Company has an obligation to purchase the shares at fair value after consulting with the parties on the timing and size of the acquisition, taking in to account financial conditions, business conditions, and other circumstances. Columboola Solar Farm Hold Co Pty., Ltd. The Company holds a call option to purchase the shares held by another shareholder at 80% of the stock's valuation in the event of a breach of obligation specified in the shareholder agreement.
Summary of Non-Controlling Interest Prior to Intra-Group Eliminations	(6) Details of non-controlling interests prior to intra-Company eliminations as of and for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 Description KEPCO Ilijan KEPCO Plant KEPCO Construction Others Total In millions of won Percentage of ownership 49.00 % 49.00 % 33.92 % Current assets ￦ 234,224 793,995 253,958 1,030,049 2,312,226 Non-current assets 24,845 626,710 451,085 3,838,233 4,940,873 Current liabilities (30,783 ) (265,017 ) (183,100 ) (599,373 ) (1,078,273 ) Non-current liabilities (7,772 ) (46,590 ) (8,492 ) (2,666,345 ) (2,729,199 ) Net assets 220,514 1,109,098 513,451 1,602,564 3,445,627 Book value of non-controlling interests 108,052 543,458 174,163 720,761 1,546,434 Sales 60,532 1,375,668 433,127 1,286,002 3,155,329 Profit for the year 12,981 98,132 16,452 128,264 255,829 Profit for the year attributable to non-controlling interests 6,361 48,085 5,581 28,914 88,941 Cash flows from operating activities 116,440 133,160 (16,270 ) 303,577 536,907 Cash flows from investing activities 2,216 (39,444 ) 19,061 (309,447 ) (327,614 ) Cash flows from financing activities before dividends to non-controlling (88,927 ) (30,599 ) (8,467 ) 125,685 (2,308 ) Dividends to non-controlling interests —  (25,269 ) (3,639 ) (2,608 ) (31,516 ) Effect of exchange rate fluctuation 10,683 885 38 7,243 18,849 Net increase (decrease) of cash and cash equivalents 40,412 38,733 (9,277 ) 124,450 194,318 2022 Description KEPCO Ilijan KEPCO Plant KEPCO Construction Others Total In millions of won Percentage of ownership 49.00 % 49.00 % 33.92 % Current assets ￦ 230,031 861,705 372,031 1,147,973 2,611,740 Non-current assets 1,101 693,748 443,502 4,942,229 6,080,580 Current liabilities (3,642 ) (316,497 ) (243,796 ) (841,521 ) (1,405,456 ) Non-current liabilities —  (28,205 ) (28,323 ) (2,944,145 ) (3,000,673 ) Net assets 227,490 1,210,751 543,414 2,304,536 4,286,191 Book value of non-controlling interests 111,470 593,268 184,326 565,796 1,454,860 Sales 23,263 1,425,913 505,291 1,709,390 3,663,857 Profit for the year 16,455 97,881 17,954 91,566 223,856 Profit for the year attributable to non-controlling interests 8,063 47,962 6,090 (24,370 ) 37,745 Cash flows from operating activities 68,475 81,419 4,918 231,653 386,465 Cash flows from investing activities 22,604 27,372 18,712 (747,507 ) (678,819 ) Cash flows from financing activities before dividends to non-controlling (9,609 ) (33,187 ) (7,260 ) 582,580 532,524 Dividends to non-controlling interests (8,834 ) (26,438 ) (3,071 ) (4,001 ) (42,344 ) Effect of exchange rate fluctuation 8,807 (486 ) 5 (11,023 ) (2,697 ) Net increase (decrease) of cash and cash equivalents 81,443 48,680 13,304 51,702 195,129 2023 Description KEPCO Ilijan KEPCO Plant KEPCO Construction Others Total In millions of won Percentage of ownership 49.00 % 49.00 % 48.76 % Current assets ￦ 142,023 953,211 446,900 1,193,078 2,735,212 Non-current assets 688 632,169 407,804 4,639,760 5,680,421 Current liabilities (252 ) (313,249 ) (249,899 ) (1,009,791 ) (1,573,191 ) Non-current liabilities (548 ) (5,348 ) (57,497 ) (2,737,589 ) (2,800,982 ) Net assets 141,911 1,266,783 547,308 2,085,458 4,041,460 Book value of non-controlling interests 69,536 620,723 266,867 462,581 1,419,707 Sales —  1,523,031 545,092 1,212,372 3,280,495 Profit for the year 3,718 161,849 32,654 63,145 261,366 Profit for the year attributable to non-controlling interests 1,822 79,306 15,922 9,355 106,405 Cash flows from operating activities 1,086 (35,492 ) 39,985 368,415 373,994 Cash flows from investing activities 84 26,915 (19,345 ) (508,844 ) (501,190 ) Cash flows from financing activities before dividends to non-controlling (93,348 ) (36,433 ) (6,687 ) 119,109 (17,359 ) Dividends to non-controlling interests (643 ) (28,775 ) (5,250 ) (20,866 ) (55,534 ) Effect of exchange rate fluctuation 5,135 (454 ) (35 ) 2,813 7,459 Net increase of cash and cash equivalents (87,686 ) (74,239 ) 8,668 (39,373 ) (192,630 )
Summary of Changes in Goodwill	(7) Changes in goodwill (i) Details of goodwill as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Acquisition cost ￦ 100,093 101,738 Less: Accumulated impairment —  (2,582 ) Carrying book value ￦ 100,093 99,156 (ii) Changes in goodwill for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Increase Decrease Others Ending In millions of won Acquisition cost ￦ 105,647 — — (5,554 ) 100,093 Less: Accumulated impairment — — — —  — Carrying book value ￦ 105,647 — — (5,554 ) 100,093 2023 Beginning Increase Decrease Impairment Others Ending In millions of won Acquisition cost ￦ 100,093 1,859 — — (214 ) 101,738 Less: Accumulated impairment — — — (2,582 ) — (2,582 ) Carrying book value ￦ 100,093 1,859 — (2,582 ) (214 ) 99,156
Summary of Cash Dividends Received from Subsidiaries	(9) Cash dividends received from subsidiaries for the years ended December 31, 2021, 2022 and 2023, respectively, are as follows: Subsidiaries 2021 2022 2023 In millions of won Korea Hydro & Nuclear Power Co., Ltd. ￦ 279,779 136,010 1,560,120 Korea South-East Power Co., Ltd. —  4,808 340,710 Korea Midland Power Co., Ltd. —  24,694 291,558 Korea Western Power Co., Ltd. —  —  344,756 Korea Southern Power Co., Ltd. —  —  293,027 Korea East-West Power Co., Ltd. —  4,866 300,436 KEPCO Engineering & Construction Company, Inc. 7,089 5,983 7,114 KEPCO Plant Service & Engineering Co., Ltd. 26,301 27,517 29,952 KEPCO Nuclear Fuel Co., Ltd. 5,206 11,184 15,178 KEPCO KDN Co., Ltd. 18,854 36,986 185,549 KEPCO Energy Solution Co., Ltd. —  1,707 9,480 KEPCO Solar Co., Ltd. —  1,409 16,023 KEPCO MCS Co., Ltd. —  —  15,353 KEPCO International HongKong Ltd. —  9,044 5,962 KEPCO Philippines Corporation —  2,375 24,246 KEPCO Ilijan Corporation 7,955 9,195 1,298 KEPCO Philippines Holdings Inc. 60,520 34,913 1,386 KOSPO Australia Pty., Ltd. 3,095 31,386 —  KEPCO Netherlands B.V. —  16,795 3,124 Qatrana Electric Power Company 2,615 2,751 6,511 KEPCO KPS Philippines Corp. —  302 — Tamra Offshore Wind Power Co., Ltd. —  2,877 3,863 KEPCO Netherlands S3 B.V. —  4,005 2,477 PT. KOMIPO Pembangkitan Jawa Bali 153 859 578 PT. EWP Indonesia —  4,262 — Gyeongju Wind Power Co., Ltd. 2,800 2,100 6,300 KOSPO Power Services Limitada —  305 1,201 KEPCO Netherlands J3 B.V. 27,237 46,510 13,144 PT. Cirebon Power Service —  241 12,673 Chitose Solar Power Plant LLC —  639 1,386 Fujeij Wind Power Company 11,920 15,102 6,047 KOSPO Jordan LLC 731 11,450 6,089 EWP America Inc. —  3,887 — KOWEPO Lao International —  12,106 — KEPCO Neimenggu International Ltd. —  —  4,058 KST Electric Power Company, S.A.P.I. de C.V. —  —  3,145 KOMIPO Global Pte Ltd. —  —  31,066 KOSPO Australia Pty., Ltd. —  —  12,558 Changjuk Wind Power Co., Ltd. —  —  4,015 EWP Barbados 1 SRL —  —  12,987 KEPCO Energy Service Company —  —  629 Chile Solar JV SpA —  —  1,127 ￦ 454,255 466,268 3,575,130

Investments in Associates and_2

Investments in Associates and Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2023
Investments in Associates and Joint Ventures [Abstract]
Summary of Investments in Associates and Joint Ventures	(1) Investments in associates and joint ventures as of December 31, 2022 and 2023 are as follows: 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> Korea Gas Corporation Importing and wholesaling LNG Korea 20.47% ￦ 94,500 2,085,296 Korea Electric Power Industrial Development Co., Ltd. Electricity metering and others Korea 29.00% 4,727 31,078 YTN Co., Ltd. (*1) Broadcasting Korea 21.43% 59,000 55,027 Gangwon Wind Power Co., Ltd. (*2) Power generation Korea 15.00% 5,725 12,158 Hyundai Green Power Co., Ltd. Power generation equipment consignment and operation service Korea 29.00% 88,885 119,791 Korea Power Exchange (*3) Management of power market and others Korea 100.00% 127,839 275,126 Taebaek Wind Power Co., Ltd. (*29) Power generation Korea 60.00% 11,494 14,501 Taebaek Guinemi Wind Power Co., Ltd. (*29) Power generation Korea 67.25% 12,637 13,049 Daeryun Power Co., Ltd. (*2) Power generation Korea 6.85% 40,854 26,727 KNH Solar Co., Ltd. Power generation Korea 27.00% 1,296 2,883 SPC Power Corporation (*30) Power generation Philippines 38.00% 20,635 70,868 Gemeng International Energy Co., Ltd. Power generation China 34.00% 413,153 578,821 PT. Cirebon Electric Power Power generation Indonesia 27.50% 40,365 135,114 KNOC Nigerian East Oil Co., Ltd. (*4) Resources development Nigeria 14.63% 12 —  KNOC Nigerian West Oil Co., Ltd. (*4) Resources development Nigeria 14.63% 12 —  PT Wampu Electric Power Power generation Indonesia 46.00% 21,292 37,743 PT. Bayan Resources TBK Resources development Indonesia 20.00% 615,860 684,719 S-Power Co., Ltd. Power generation Korea 49.00% 132,300 141,128 Pioneer Gas Power Limited Power generation India 38.50% 49,831 —  Eurasia Energy Holdings Power generation and resources development Russia 40.00% 461 —  Xe-Pian Xe-Namnoy Power Co., Ltd. Power generation Laos 25.00% 87,426 115,584 PT. Mutiara Jawa Manufacturing and operating floating coal terminal Indonesia 29.00% 2,978 3,597 Samcheok Eco Materials Co., Ltd. (*5) Recycling fly ashes Korea 2.35% 686 —  Noeul Green Energy Co., Ltd. Power generation Korea 29.00% 1,740 —  Goseong Green Power Co., Ltd. Power generation Korea 29.00% 262,740 288,893 Gangneung Eco Power Co., Ltd. (*2) Power generation Korea 1.61% 2,900 —  Shin Pyeongtaek Power Co., Ltd. Power generation Korea 40.00% 72,000 133,823 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Power generation Korea 28.00% 194 278 Dongducheon Dream Power Co., Ltd. (*6) Power generation Korea 33.61% 148,105 89,300 Jinbhuvish Power Generation Pvt. Ltd. (*2) Power generation India 5.16% 9,000 —  Daejung Offshore Wind Power Co., Ltd. Power generation Korea 46.59% 5,190 1,555 GS Donghae Electric Power Co., Ltd. Power generation Korea 34.00% 204,000 260,145 Daegu Photovoltaic Co., Ltd. Power generation Korea 29.00% 1,230 2,849 Busan Green Energy Co., Ltd. Power generation Korea 29.00% 5,243 4,395 Gunsan Bio Energy Co., Ltd. (*2) Power generation Korea 18.87% 1,000 —  Hansuwon KNP Co., Ltd. Electric material agency Korea 28.98% 537 280 Korea Electric Power Corporation Fund (*7) Developing electric enterprises Korea 98.09% 23,113 28,842 Energy Infra Asset Management Co., Ltd. (*2) Asset management Korea 9.90% 297 1,184 Daegu clean Energy Co., Ltd. Renewable power generation Korea 28.00% 140 12 Yaksu Installing ESS related equipment Korea 29.00% 210 486 Nepal Water & Energy Development Company Private Limited (*8) Construction and operation of utility plant Nepal 69.06% 70,228 69,940 Gwangyang Green Energy Co., Ltd. Power generation Korea 20.00% 26,800 25,044 PND S Power generation Korea 29.00% 1,250 1,403 Hyundai Eco Energy Co., Ltd. (*2) Power generation Korea 19.00% 3,610 7,631 YeongGwang Yaksu Wind Electric Co., Ltd. (*2) Power generation Korea 9.63% 533 156 Green Energy Electricity Generation Co., Ltd. Power generation Korea 29.00% 1,189 1,571 Korea Energy Solutions Co., Ltd. R & D Korea 20.00% 300 93 ITR Co., Ltd. R & D Korea 20.00% 50 —  2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Technical testing and consulting Korea 20.00% ￦ 25 366 Namjeongsusang Solar Power Operation Co., Ltd. (*9) Power generation Korea 15.00% 969  373 Indeck Niles Development, LLC Power generation USA 50.00% 263,825 302,038 Indeck Niles Asset Management, LLC Power generation USA 33.33% —  94 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 Holding company Korea 49.00% 6,910 6,932 Suwon New Power Co., Ltd. Power generation Korea 39.90% 798 919 Gwangbaek Solar Power Investment Co., Ltd. Power generation Korea 44.00% 4,757 5,133 Go deok Clean Energy Co., Ltd. Fuel cell generation Korea 40.00% 5,560 4,420 SureDataLab Co., Ltd. R & D Korea 23.95% 126 177 SEP Co., Ltd. R & D Korea 21.26% 27 —  Hankook Electric Power Information Co., Ltd. (*13) R & D Korea 16.49% 38 220 Tronix Co., Ltd. (*13) R & D Korea 12.50% 75 66 O2&B Global Co., Ltd. R & D Korea 20.00% 25 36 Muan Sunshine Solar Power Plant Co., Ltd. Power generation Korea 20.00% 1,570 2,562 Bigeum Resident Photovoltaic Power Co., Ltd. Power generation Korea 29.90% 1 —  Goesan Solar Park Co., Ltd. Power generation Korea 29.00% 1,276 2,591 Saemangeum Heemang Photovoltaic Co., Ltd. Power generation Korea 35.00% 11,022 13,010 Bitgoel Eco Energy Co., Ltd. Power generation Korea 49.25% 7,880 8,951 Jeju Gimnyeong Wind Power Co., Ltd. Power generation Korea 30.00% 714 872 Seoroseoro Sunny Power Plant Co., Ltd. Power generation Korea 42.58% 706 859 Muan Solar park Co., Ltd. Power generation Korea 20.00% 4,400 7,838 YuDang Solar Co., Ltd. Power generation Korea 20.00% 360 586 Anjwa Smart Farm & Solar City Co., Ltd. Power generation Korea 20.00% 5,651 8,662 Daewon Green Energy Co., Ltd. Power generation Korea 25.36% 3,910 4,485 G.GURU Co., Ltd. R & D Korea 24.65% 493 300 UD4M Co., Ltd. (*10) R & D Korea 12.50% 75 161 Dongbu Highway Solar Co., Ltd. Power generation Korea 20.00% 190 352 Seobu Highway Solar Co., Ltd. Power generation Korea 20.00% 195 316 Korea Energy Data Co., Ltd. R & D Korea 29.37% 60 62 Gangneung Sacheon Fuel Cell Co., Ltd. Power generation Korea 41.00% 5,695 4,277 KOSTURE Co., Ltd. (*2) Coal recycling business Korea 0.82% 1 1 Taebaek Gadeoksan Wind Power Co., Ltd. Power generation Korea 34.00% 12,570 20,040 Chuncheon Green Energy Co., Ltd. Power generation Korea 45.00% 9,540 9,155 Yeomsubong Wind Power Co., Ltd. (*11) Power generation Korea 3.81% 95 62 Yeongyang Wind Power Corporation II Power generation Korea 30.00% 7,965 7,461 Haeparang Energy Co., Ltd. Power generation Korea 25.00% 2,241 2,188 Saemangeum Sebit Power Plant Co., Ltd. (*12) Power generation Korea 63.33% 13,788 23,199 Boulder Solar III, LLC Power generation USA 30.00% 715 744 PlatformN. Co., Ltd. R & D Korea 29.58% 105 84 PT. Cirebon Energi Prasarana (*9) Power generation Indonesia 10.00% 26,710 69,035 Green Radiation Co., Ltd. (*13) R & D Korea 10.00% 20 11 Future Convergence Technology Laboratory. Co., Ltd. R & D Korea 20.12% 76 50 SC E&G. Co,. Ltd. R & D Korea 20.00% 90 214 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) R & D Korea 20.00% 81 166 ACE R & D Korea 20.00% 20 20 Environment and Energy Co., Ltd. (*13) R & D Korea 10.54% 11 10 Santiago Solar Power SpA Power generation Chile 50.00% 13,851 13,373 Yanggu Floating Photovoltaic Power Plant Inc. Power generation Korea 29.00% 904 903 ￦ 3,089,683 5,844,464 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> KEPCO-Uhde Inc. (*14) Power generation Korea 52.80% ￦ 11,355 17 Shuweihat Asia Power Investment B.V. Holding company Netherlands 49.00% 44,405 66,452 Shuweihat Asia Operation & Maintenance Company (*14) Maintenance of utility plant Cayman 55.00% 30 1,631 Waterbury Lake Uranium L.P. (*15) Resources development Canada 32.59% 26,602 21,750 ASM-BG Investicii AD Power generation Bulgaria 50.00% 9,846 14,555 RES Technology AD Power generation Bulgaria 50.00% 11,922 15,133 KV Holdings, Inc. (*30) Power generation Philippines 40.00% 2,103 9,659 KEPCO SPC Power Corporation (*14,30) Construction and operation of utility plant Philippines 75.20% 94,579  179,594 Gansu Datang Yumen Wind Power Co., Ltd. Power generation China 40.00% 16,621 6,024 Datang Chifeng Renewable Power Co., Ltd. Power generation China 40.00% 121,928 191,982 Datang KEPCO Chaoyang Renewable Power Co., Ltd. Power generation China 40.00% 39,872 44,398 Rabigh Electricity Company Power generation Saudi arabia 40.00% 109,743 214,607 Rabigh Operation & Maintenance Company Limited Maintenance of utility plant Saudi arabia 40.00% 70 5,113 Jamaica Public Service Company Limited Power generation Jamaica 40.00% 301,910 331,407 KW Nuclear Components Co., Ltd. Manufacturing Korea 45.00% 833 17,090 Busan Shinho Solar Power Co., Ltd. Power generation Korea 25.00% 2,100 6,719 Global Trade Of Power System Co., Ltd. (*16) Exporting products and technology of small or medium business by proxy Korea 29.00% 290 698 Expressway Solar-light Power Generation Co., Ltd. (*17) Power generation Korea 50.00% 1,856 4,754 Amman Asia Electric Power Company (*14) Power generation Jordan 60.00% 111,476 220,254 KAPES, Inc. (*14) R & D Korea 51.00% 5,629 —  Honam Wind Power Co., Ltd. Power generation Korea 29.00% 3,480 4,819 Korea Power Engineering Service Co., Ltd. Construction and service Korea 29.00% 290 5,543 Chun-cheon Energy Co., Ltd. Power generation Korea 29.90% 52,700 32,044 Yeonggwangbaeksu Wind Power Co., Ltd. (*16) Power generation Korea 15.00% 3,000 3,151 Nghi Son 2 Power LLC Power generation Vietnam 50.00% 175,261 408,839 Kelar S.A. (*14) Power generation Chile 65.00% 78,060 117,137 PT. Tanjung Power Indonesia Power generation Indonesia 35.00% 57,039 92,907 Incheon New Power Co., Ltd. (*18) Power generation Korea 29.00% 461 198 Seokmun Energy Co., Ltd. Power generation Korea 29.00% 15,370 17,336 Daehan Wind Power PSC Power generation Jordan 50.00% 7,493 13,923 Barakah One Company (*19) Power generation UAE 18.00% 118 —  Nawah Energy Company (*19) Operation of utility plant UAE 18.00% 296 315 MOMENTUM International thermonuclear experimental reactor construction management France 33.33% 1 345 Daegu Green Power Co., Ltd. (*20) Power generation Korea 29.00% 46,225 29,360 Yeonggwang Wind Power Co., Ltd. Power generation Korea 46.00% 17,475 20,713 Chester Solar IV SpA Power generation Chile 45.00% 1,700 181 Chester Solar V SpA Power generation Chile 45.00% 525 156 Diego de Almagro Solar SpA Power generation Chile 45.00% 2,091 540 South Jamaica Power Company Limited Power generation Jamaica 20.00% 20,430 46,437 Daesan Green Energy Co., Ltd. Power generation Korea 35.00% 17,850 19,218 RE Holiday Holdings LLC Power generation USA 50.00% 42,948 85,370 RE Pioneer Holdings LLC Power generation USA 50.00% 27,891 55,172 RE Barren Ridge 1 Holdings LLC Power generation USA 50.00% 28,021 3,350 RE Astoria 2 LandCo LLC Power generation USA 50.00% 5,188 6,599 RE Barren Ridge LandCo LLC Power generation USA 50.00% 2,187 2,333 Laurel SpA Power generation Chile 45.00% 1,222 554 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd (*16) Power generation Australia 12.37% 4,095 3,651 Chile Solar JV SpA Power generation Chile 50.00% 12,674 9,819 Cheong-Song Noraesan Wind Power Co., Ltd. (*15) Power generation Korea 29.01% 3,200 4,263 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> Chester Solar I SpA Power generation Chile 45.00% ￦ 1,181 1,314 Solar Philippines Calatagan Corporation Power generation Philippines 38.00% 47,903 56,902 Saemangeum Solar Power Co., Ltd. (*21) Power generation Korea 81.01% 26,400 23,551 Chungsongmeon BongSan wind power Co., Ltd. (*16) Power generation Korea 29.00% 2,900 3,470 Jaeun Resident Wind Power Plant Co., Ltd. (*16) Power generation Korea 29.00% 2,494 2,236 DE Energia SpA Power generation Chile 49.00% 8,364 9,536 Dangjin Eco Power Co., Ltd. Power generation Korea 34.00% 25,661 26,859 Haemodum Solar Co., Ltd. Power generation Korea 49.00% 2,940 3,367 Yangyang Wind Power Co., Ltd. Power generation Korea 50.00% 12,000 10,864 HORUS SOLAR, S.A. DE C.V. (*22) Renewable power generation Mexico 14.95% 5,068 6,976 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. (*22) Renewable power generation Mexico 14.95% 3,678 4,899 SUNMEX RENOVABLES, S.A. DE C.V. (*22) Renewable power generation Mexico 14.95% 1,678 1,657 Stavro Holding II A.B. Holding company Sweden 20.00% 18,566 17,171 Solaseado Solar Power Co., Ltd. Power generation Korea 39.00% 7,020 16,233 Yeongam Solar Power Co., Ltd. (*16) Power generation Korea 19.00% 6,460 9,879 Samsu Wind Power Co., Ltd. (*16) Power generation Korea 19.00% 2,637 3,205 Pulau Indah Power Plant Sdn. Bhd. Power generation Malaysia 25.00% 23,833 26,814 NH-Amundi Global Infrastructure Investment Private Investment Trust 21 Holding company Korea 29.53% 20,061 21,723 Shin-han BNPP Private Investment Trust for East-West Sunlight Dream (*14) Holding company Korea 90.00% 15,012 15,587 PT Barito Wahana Tenaga Power generation Indonesia 30.61% 59,574 137,047 Cheongna Energy Co., Ltd. (*21) Generating and distributing vapor and hot/cold water Korea 50.10% 49,344 10,758 Naepo Green Energy Co., Ltd. Power generation Korea 29.20% 29,200 —  Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) (*23) Power generation Korea 30.66% 71,070 —  OneEnergy Asia Limited Power generation Vietnam 40.00% 115,949 172,218 KAS INVESTMENT I LLC (*15) Holding company USA 29.89% 23,437 18,247 KAS INVESTMENT II LLC (*15) Holding company USA 29.89% 23,343 18,173 Energyco Co., Ltd. Power generation Korea 29.00% 1,659 2,190 CAES, LLC Holding company USA 36.00% 19,414 20,805 Hapcheon Floating Photovoltaic Power Plant Inc. (*16) Power generation Korea 49.00% 7,512 8,471 Busan Industrial Solar Power Co., Ltd. Power generation Korea 28.02% 510 1,168 Bitsolar Energy Co., Ltd. Power generation Korea 27.10% 352 352 Pulau Indah O&M Sdn. Bhd. (*24) Power generation Malaysia 60.00% —  —  Guadalupe Solar SpA (*24) Power generation Chile 60.00% 1,397 913 Omisan Wind Power Co., Ltd. Power generation Korea 42.00% 10,752 10,411 Foresight Iberian Solar Group Holding, S.L. (*24) Power generation Spain 75.00% 11,465 10,565 Yeongwol Eco Wind Co., Ltd. Power generation Korea 29.00% 3,089 3,155 Gurae Resident Power Co., Ltd. Power generation Korea 29.00% 386 391 Cheongju Eco Park Co., Ltd. Power generation Korea 29.00% 5,858 10,490 Enel X Midland Photovoltaic, LLC Power generation Korea 20.00% 1,695 1,856 Geumsungsan Wind Power Co., Ltd. Power generation Korea 29.00% 6,531 3,493 KEPCO KPS CARABAO Corp. (*18) Utility plant maintenance Philippines 40.00% 93 177 Prime Swedish Holding AB Holding company Sweden 45.00% 35,410 36,245 Goheung New Energy Co., Ltd. Power generation Korea 46.15% 12,959 11,832 Gunsan Land Solar Co., Ltd. (*24) Power generation Korea 75.29% 19,091 27,544 CapMan Lynx SCA, SICAR Holding company Luxembourg 50.00% 9,601 —  International Offshore Power Transmission Holding Company Limited Undersea transmission network operation UAE 35.00% —  —  Pyeongchang Wind Power Co., Ltd. (*28) Power generation Korea 58.00% 9,329 14,464 Eumseong Eco Park Co., Ltd. Power generation Korea 29.00% 5,741 5,557 Songsan Green Energy Co., Ltd. (*15) Fuel cell generation Korea 25.00% 1,400 1,387 2022 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> Changwon Nu-ri Energy Co., Ltd. (*15) Fuel cell generation Korea 33.33% ￦ 500 497 Hasami Wind Farm Corporation Power generation Korea 29.00% 1,596 1,589 PungBack Wind Farm Corporation (*26) Power generation Korea 32.89% 7,885 6,743 Trumbull Asset Management, LLC (*27) Holding company USA 78.00% —  246 S-Power Chile SpA Power generation Chile 50.00% 127 127 Seungmun Green Energy Power generation Korea 33.00% 8,973 9,054 Seobusambo highway photovoltaics Co., Ltd. (*25) Power generation Korea 80.00% 3,020 3,066 2,332,579 3,147,584 ￦ 5,422,262 8,992,048 (*1) The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022. (*2) The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors. (*3) The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity. (*4) The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity. (*5) Although the nominal percentage of ownership is 2.35%, the effective percentage of ownership is 25.54%, considering redeemable convertible preferred stock as a liability component. (*6) The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock. (*7) The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate. (*8) The effective percentage of ownership is more than 50% but the Company does not hold control over the entity according to the shareholders’ agreement. Accordingly, the entity is classified as an associate. (*9) The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation. (*10) The effective percentage of ownership is 14.29% due to the acquisition of treasury stocks. The effective percentage of ownership is less than 20%. However, the Company exercises significant influence over the decisions related to finance and operation by virtue of right to nominate directors to the board of directors of the entity. (*11) The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation. (*12) The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate. (*13) The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity. (*14) The effective percentage of ownership is more than 50%. However, according to the shareholders’ agreement, all critical financial and operating decisions must be agreed to by all ownership parties and the Company can exercise same voting rights as other shareholders at the board of directors. Accordingly, the entities are classified as joint ventures. (*15) The effective percentage of ownership is less than 50%. However, the entity is classified as a joint venture, because all consent was required to make decisions on related activities. (*16) According to the shareholders’ agreement, the parties have joint control over all decisions related to finance and operation. Accordingly, the entity is classified as joint ventures. (*17) The effective percentage of ownership increased due to the disproportionate capital reduction of financial investors during the year ended December 31, 2022. (*18) The joint arrangement which the Company has joint control is structured through a separate company. The parties have joint control over the joint arrangement are classified as joint ventures, judging that they have rights to the net assets of the arrangement. (*19) The effective percentage of ownership is less than 20%. However, decisions in relevant activities must be agreed by ownership parties. Accordingly, the entity is classified as joint ventures. (*20) Although the nominal percentage of ownership is 29%, the effective percentage of ownership is 54.24%, considering the interest of financial investors as a liability component. (*21) The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture. (*22) The effective percentage of ownership is less than 20%. However, according to the shareholders' agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the Company can exercise significant influence. (*23) According to the Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders’ agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture. (*24) The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture. (*25) Due to the changes in the agreement, the Company lost its control over the entity. Accordingly, the entity is reclassified to a joint venture from a subsidiary. Although the effective percentage of ownership is more than 50%, decisions in relevant activities must be agreed by all members of the board of directors. (*26) The effective percentage of ownership is 37%, considering potential common stock. (*27) The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture. (*28) After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture. (*29) After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating (*30) T T 2023 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> Korea Gas Corporation Importing and wholesaling LNG Korea 20.47 % W 94,500 1,970,643 Korea Electric Power Industrial Development Co., Ltd. Electricity metering and others Korea 29.00 % 4,727 29,500 YTN Co., Ltd. (*1) Broadcasting Korea 21.43 % 59,000 52,303 Gangwon Wind Power Co., Ltd. (*2) Power generation Korea 15.00 % 5,725 12,001 Hyundai Green Power Co., Ltd. Power generation equipment consignment and operation service Korea 29.00 % 88,885 118,173 Korea Power Exchange (*3) Management of power market and others Korea 100.00 % 127,839 274,286 Taebaek Guinemi Wind Power Co., Ltd. (*28) Power generation Korea 67.25 % 12,637 13,530 Daeryun Power Co., Ltd. (*2) Power generation Korea 6.85 % 46,373 26,834 KNH Solar Co., Ltd. Power generation Korea 27.00 % 1,296 3,194 SPC Power Corporation (*29) Power generation Philippines 38.00 % 20,635 78,931 Gemeng International Energy Co., Ltd. Power generation China 42.00 % 516,007 705,812 PT. Cirebon Electric Power Power generation Indonesia 27.50 % 40,365 134,259 KNOC Nigerian East Oil Co., Ltd. (*4) Resources development Nigeria 14.63 % 12 —  KNOC Nigerian West Oil Co., Ltd. (*4) Resources development Nigeria 14.63 % 12 —  PT Wampu Electric Power Power generation Indonesia 46.00 % 21,292 34,555 PT. Bayan Resources TBK Resources development Indonesia 20.00 % 615,860 619,207 S-Power Power generation Korea 49.00 % 132,300 162,765 Pioneer Gas Power Limited Power generation India 38.50 % 49,831 —  Xe-Pian Xe-Namnoy Power generation Laos 25.00 % 87,426 116,378 PT. Mutiara Jawa Manufacturing and operating floating coal terminal Indonesia 29.00 % 2,978 5,168 Samcheok Eco Materials Co., Ltd. (*5) Recycling fly ashes Korea 25.54 % 686 —  Noeul Green Energy Co., Ltd. Power generation Korea 29.00 % 1,740 —  Goseong Green Power Co., Ltd. Power generation Korea 29.00 % 262,740 287,624 Gangneung Eco Power Co., Ltd. (*17) Power generation Korea 29.00 % 261,000 254,929 Shin Pyeongtaek Power Co., Ltd. Power generation Korea 40.00 % 72,000 145,026 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Power generation Korea 28.00 % 194 294 Dongducheon Dream Power Co., Ltd. (*6) Power generation Korea 33.61 % 148,105 87,203 Jinbhuvish Power Generation Pvt. Ltd. (*2) Power generation India 5.16 % 9,000 —  Daejung Offshore Wind Power Co., Ltd. Power generation Korea 46.59 % 5,190 1,483 GS Donghae Electric Power Co., Ltd. Power generation Korea 34.00 % 204,000 259,085 Daegu Photovoltaic Co., Ltd. Power generation Korea 29.00 % 1,230 2,804 Busan Green Energy Co., Ltd. Power generation Korea 29.00 % 5,243 3,259 Hansuwon KNP Co., Ltd. Electric material agency Korea 28.98 % 537 467 Korea Electric Power Corporation Fund (*7) Developing electric enterprises Korea 98.09 % 20,847 23,421 Energy Infra Asset Management Co., Ltd. (*33) Asset management Korea 9.90 % 297 1,213 Daegu clean Energy Co., Ltd. Renewable power generation Korea 28.00 % 140 —  Yaksu Installing ESS related equipment Korea 29.00 % 210 285 Nepal Water & Energy Development Company Private Limited (*8,17) Construction and operation of utility plant Nepal 68.88 % 110,332 110,573 Gwangyang Green Energy Co., Ltd. Power generation Korea 20.00 % 26,800 24,638 PND S Power generation Korea 29.00 % 1,250 1,510 Hyundai Eco Energy Co., Ltd. (*2) Power generation Korea 19.00 % 3,610 7,947 YeongGwang Yaksu Wind Electric Co., Ltd. (*2) Power generation Korea 9.63 % 533 133 Green Energy Electricity Generation Co., Ltd. Power generation Korea 29.00 % 1,189 8 Korea Energy Solutions Co., Ltd. R & D Korea 20.00 % 300 170 ITR Co., Ltd. (*32) R & D Korea 10.00 % 50 —  STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Technical testing and consulting Korea 20.00 % 25 391 Indeck Niles Development, LLC Power generation USA 50.00 % 263,825 335,401 Indeck Niles Asset Management, LLC Power generation USA 33.33 % —  93 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 Holding company Korea 49.00 % 6,482 6,496 Suwon New Power Co., Ltd. Power generation Korea 39.90 % 798 1,022 2023 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Associates> Gwangbaek Solar Power Investment Co., Ltd. Power generation Korea 44.00 % W 4,757 5,155 Go deok Clean Energy Co., Ltd. Fuel cell generation Korea 40.00 % 5,560 4,723 SureDataLab Co., Ltd. R & D Korea 23.95 % 126 114 SEP Co., Ltd. R & D Korea 21.26 % 27 —  Hankook Electric Power Information Co., Ltd. (*13) R & D Korea 16.49 % 38 214 Tronix Co., Ltd. (*13) R & D Korea 12.50 % 75 220 O2&B Global Co., Ltd. R & D Korea 20.00 % 25 21 Muan Sunshine Solar Power Plant Co., Ltd. Power generation Korea 20.00 % 1,570 2,822 Bigeum Resident Photovoltaic Power Co., Ltd. Power generation Korea 29.90 % 1 —  Goesan Solar Park Co., Ltd. Power generation Korea 29.00 % 1,276 2,877 Saemangeum Heemang Photovoltaic Co., Ltd. Power generation Korea 35.00 % 11,022 14,420 Bitgoel Eco Energy Co., Ltd. Power generation Korea 49.25 % 7,880 12,394 Jeju Gimnyeong Wind Power Co., Ltd. Power generation Korea 30.00 % 714 246 Seoroseoro Sunny Power Plant Co., Ltd. Power generation Korea 42.58 % 706 941 Muan Solar park Co., Ltd. Power generation Korea 20.00 % 4,400 6,830 YuDang Solar Co., Ltd. Power generation Korea 20.00 % 360 570 Anjwa Smart Farm & Solar City Co., Ltd. Power generation Korea 20.00 % 5,651 7,665 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Power generation Korea 25.36 % 3,910 7,779 G.GURU Co., Ltd. R & D Korea 24.65 % 493 167 UD4M Co., Ltd. (*10) R & D Korea 12.50 % 75 150 Dongbu Highway Solar Co., Ltd. Power generation Korea 20.00 % 190 380 Seobu Highway Solar Co., Ltd. Power generation Korea 20.00 % 195 406 Korea Energy Data Co., Ltd. R & D Korea 29.37 % 60 36 Gangneung Sacheon Fuel Cell Co., Ltd. Power generation Korea 41.00 % 5,695 7,870 KOSTURE Co., Ltd. (*2) Coal recycling business Korea 4.42 % 7 8 Taebaek Gadeoksan Wind Power Co., Ltd. Power generation Korea 34.00 % 12,570 19,426 Chuncheon Green Energy Co., Ltd. Power generation Korea 45.00 % 9,540 8,900 Yeomsubong Wind Power Co., Ltd. (*11) Power generation Korea 29.00 % 1,411 871 Yeongyang Wind Power Corporation II Power generation Korea 30.00 % 7,965 10,100 Haeparang Energy Co., Ltd. Power generation Korea 25.00 % 2,241 2,104 Saemangeum Sebit Power Plant Co., Ltd. (*12) Power generation Korea 55.14 % 21,037 37,191 Boulder Solar III, LLC Power generation USA 30.00 % 715 754 PlatformN. Co., Ltd. R & D Korea 29.58 % 105 —  PT. Cirebon Energi Prasarana (*9) Power generation Indonesia 10.00 % 26,710 76,597 Green Radiation Co., Ltd. (*13) R & D Korea 10.00 % 20 26 Future Convergence Technology Laboratory. Co., Ltd. R & D Korea 20.12 % 76 36 Eco Motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.) R & D Korea 20.00 % 90 267 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) (*33) R & D Korea 16.67 % 81 120 ACE R & D Korea 20.00 % 25 2 Environment and Energy Co., Ltd. (*13) R & D Korea 10.54 % 11 9 Santiago Solar Power SpA Power generation Chile 50.00 % 13,851 11,769 Yanggu Floating Photovoltaic Power Plant Inc. Power generation Korea 29.00 % 904 760 Power Embedded R & D Korea 23.33 % 70 70 Changwon SG Energy Co., Ltd. (*13) Power generation Korea 18.78 % 900 783 Donpyung Technology. Co., Ltd. R & D Korea 20.00 % 125 254 HORANG ENERGY Inc. Power generation Korea 40.00 % 4,240 4,149 Hoenggye Renewable Energy Co., Ltd Power generation Korea 36.12 % 2,375 2,375 Haman Green Energy Co., Ltd. Power generation Korea 35.00 % 4,771 2,981 Songsan Green Energy Co., Ltd. (*21) Power generation Korea 60.00 % 8,400 8,323 W 3,509,099 6,176,889 2023 Investees Key operation activities Location Percentage of Acquisition Book value In millions of won <Joint ventures> Shuweihat Asia Power Investment B.V. Holding company Netherlands 49.00 % W 44,405 69,902 Shuweihat Asia Operation & Maintenance Company (*14) Maintenance of utility plant Cayman 55.00 % 30 1,818 Waterbury Lake Uranium L.P. (*15) Resources development Canada 30.65 % 26,602 22,612 ASM-BG Power generation Bulgaria 50.00 % 9,846 14,739 RES Technology AD Power generation Bulgaria 50.00 % 11,922 14,383 KV Holdings, Inc. (*29) Power generation Philippines 40.00 % 2,103 5,186 KEPCO SPC Power Corporation (*14,29) Construction and operation of utility plant Philippines 75.20 % 94,579 196,544 Gansu Datang Yumen Wind Power Co., Ltd. Power generation China 40.00 % 16,621 6,315 Datang Chifeng Renewable Power Co., Ltd. Power generation China 40.00 % 121,928 186,739 Datang KEPCO
Summary of Fair Value Associates	(2) The fair value of associates which are actively traded on an open market and have a readily available market value as of December 31, 2022 and 2023 are as follows: Investees 2022 2023 In millions of won <Associates> Korea Electric Power Industrial Development Co., Ltd. ￦ 80,454 69,298 Korea Gas Corporation(*2) 684,180 466,830 YTN Co., Ltd. (*1) 50,220 54,180 SPC Power Corporation 121,995 92,219 PT. Bayan Resources TBK 11,326,001 11,090,934 (*1) The Company sold all of its shares in YTN Co., Ltd. (21.43 %) on February 15, 2024 at the price of ￦ as the Korea Communications Commission approved of the Company’s selling shares in entirety on February 7, 2024 (see Note 51). (*2) An indicator of impairment has been identified for the Company’s investment in Korea Gas Corporation (“KOGAS”) for the years ended December 31, 2022 and 2023 as management determined that the carrying amount of the investment in KOGAS at ￦2,085,296 million and ￦1,970,642 million respectively were significantly higher than its fair value. Accordingly, management has assessed the recoverable amount of the investment by estimating the Company’s share of the present value of the estimated future cash flows expected to be generated by KOGAS. The carrying amount of KOGAS as at December 31, 2022 and 2023 are supported by the recoverable amount determination and as such, no impairment has been recognized for the years ended December 31, 2022 and 2023.
Summary of Changes in Investments in Associates and Joint Ventures	2022 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Associates> Korea Gas Corporation ￦ 1,815,513 —  —  (51,559 ) 305,638 7,746 7,958 2,085,296 Korea Electric Power Industrial Development Co., Ltd. 24,617 —  —  (1,872 ) 3,807 —  4,526 31,078 YTN Co., Ltd. 51,828 —  —  (450 ) 1,565 (34 ) 2,118 55,027 Gangwon Wind Power Co., Ltd. 10,554 —  —  (1,420 ) 3,024 —  —  12,158 Hyundai Green Power Co., Ltd. 121,955 —  —  (4,008 ) 1,770 1,345 (1,271 ) 119,791 Korea Power Exchange 269,728 —  —  —  772 —  4,626 275,126 Taebaek Wind Power Co., Ltd. 6,800 7,684 —  (825 ) 842 —  —  14,501 Taebaek Guinemi Wind Power Co., Ltd. 3,357 9,217 —  —  475 —  —  13,049 Pyeongchang Wind Power Co., Ltd. 5,411 5,454 —  (100 ) 3,695 —  (14,460 ) —  Daeryun Power Co., Ltd. 25,426 —  —  —  429 1 871 26,727 Changjuk Wind Power Co., Ltd. 8,355 11,862 —  (1,350 ) 817 —  (19,684 ) —  KNH Solar Co., Ltd. 2,278 —  —  —  606 (1 ) —  2,883 SPC Power Corporation 65,046 —  —  (2,694 ) 1,188 7,330 (2 ) 70,868 Gemeng International Energy Co., Ltd. 595,218 —  —  —  (233 ) (16,164 ) —  578,821 PT. Cirebon Electric Power 121,969 —  —  (10,659 ) 14,776 704 8,324 135,114 KNOC Nigerian East Oil Co., Ltd. —  —  —  —  (11 ) (787 ) 798 —  KNOC Nigerian West Oil Co., Ltd. —  —  —  —  (10 ) (724 ) 734 —  PT Wampu Electric Power 35,077 —  —  (5,551 ) 5,848 54 2,315 37,743 PT. Bayan Resources TBK 661,289 —  —  (515,139 ) 531,528 7,041 —  684,719 S-Power Co., Ltd. 122,786 —  —  —  18,342 —  —  141,128 Pioneer Gas Power Limited —  —  —  —  —  —  —  —  Eurasia Energy Holdings —  —  —  —  —  —  —  —  Xe-Pian Xe-Namnoy Power Co., Ltd. 92,441 —  —  —  15,582 7,561 —  115,584 PT. Mutiara Jawa 2,569 —  —  —  1,197 (169 ) —  3,597 Samcheok Eco Materials Co., Ltd. —  —  —  —  —  —  —  —  Noeul Green Energy Co., Ltd. 3,808 —  —  —  (3,824 ) —  16 —  Goseong Green Power Co., Ltd. 260,858 —  —  —  27,992 —  43 288,893 Gangneung Eco Power Co., Ltd. 2,288 —  —  —  (2,288 ) —  —  —  Shin Pyeongtaek Power Co., Ltd. 93,074 —  —  —  40,713 —  36 133,823 Haeng Bok Do Si Photovoltaic Power Co., Ltd. 223 —  —  —  55 —  —  278 Dongducheon Dream Power Co., Ltd. 74,198 —  —  —  15,086 —  16 89,300 Jinbhuvish Power Generation Pvt. Ltd. —  —  —  —  —  —  —  —  Daejung Offshore Wind Power Co., Ltd. 1,704 —  —  —  (149 ) —  —  1,555 GS Donghae Electric Power Co., Ltd. 243,772 —  —  —  15,717 —  656 260,145 Daegu Photovoltaic Co., Ltd. 2,342 —  —  (268 ) 775 —  —  2,849 Busan Green Energy Co., Ltd. 5,032 —  —  —  (667 ) —  30 4,395 Gunsan Bio Energy Co., Ltd. —  —  —  —  —  —  —  —  Korea Electric Vehicle Charging Service 1,250 —  (1,293 ) —  43 —  —  —  Hansuwon KNP Co., Ltd. 219 —  —  —  61 —  —  280 Korea Electric Power Corporation Fund 47,983 —  (25,297 ) —  7,966 (1,810 ) —  28,842 Energy Infra Asset Management Co., Ltd. 1,066 —  —  —  118 —  —  1,184 Daegu clean Energy Co., Ltd. 12 —  —  —  —  —  —  12 Yaksu 716 —  —  —  (230 ) —  —  486 Nepal Water & Energy Development Company Private Limited 66,333 —  —  —  (923 ) 4,530 —  69,940 Gwangyang Green Energy Co., Ltd. 25,466 —  —  —  (422 ) —  —  25,044 PND S 1,229 —  —  —  174 —  —  1,403 Hyundai Eco Energy Co., Ltd. 5,572 —  —  —  2,058 1 —  7,631 YeongGwang Yaksu Wind Electric Co., Ltd. 233 —  —  —  143 —  (220 ) 156 Green Energy Electricity Generation Co., Ltd. 1,713 —  —  —  (142 ) —  —  1,571 Korea Energy Solutions Co., Ltd. 123 —  —  —  (30 ) —  —  93 ITR Co., Ltd. 32 —  —  —  (32 ) —  —  —  2022 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Associates> STN Co., Ltd. (formerly, Structure test network Co., Ltd.) ￦ 306 —  —  —  60 —  —  366 Namjeongsusang Solar Power Operation Co., Ltd. 361 —  —  —  12 —  —  373 Indeck Niles Development, LLC 246,273 —  (4,289 ) —  21,975 21,840 16,239 302,038 Indeck Niles Asset Management, LLC 111 —  —  (497 ) 472 —  8 94 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 7,138 —  (202 ) (392 ) 389 (1 ) —  6,932 Suwon New Power Co., Ltd. 1,035 —  —  —  (116 ) —  —  919 KPGE Inc. 309 —  (317 ) —  8 —  —  —  Gwangbaek Solar Power Investment Co., Ltd. 4,806 —  —  —  327 —  —  5,133 Go deok Clean Energy Co., Ltd. 4,302 —  —  —  118 —  —  4,420 SureDataLab Co., Ltd. 128 —  —  —  49 —  —  177 SEP Co., Ltd. 7 —  —  —  (7 ) —  —  —  Hankook Electric Power Information Co., Ltd. 161 —  —  —  121 —  (62 ) 220 Tronix Co., Ltd. 109 —  —  —  (37 ) —  (6 ) 66 O2&B Global Co., Ltd. 35 —  —  —  1 —  —  36 Muan Sunshine Solar Power Plant Co., Ltd. 1,268 —  —  —  1,294 —  —  2,562 Bigeum Resident Photovoltaic Power Co., Ltd. —  —  —  —  —  —  —  —  Goesan Solar Park Co., Ltd. 1,927 —  —  —  664 —  —  2,591 Saemangeum Heemang Photovoltaic Co., Ltd. 10,238 —  —  —  2,772 —  —  13,010 Bitgoel Eco Energy Co., Ltd. 4,356 3,240 —  —  1,355 —  —  8,951 Jeju Gimnyeong Wind Power Co., Ltd. 911 —  —  —  (39 ) —  —  872 Seoroseoro Sunny Power Plant Co., Ltd. 721 —  —  —  138 —  —  859 Muan Solar park Co., Ltd. 6,083 —  —  (600 ) 2,377 (22 ) —  7,838 YuDang Solar Co., Ltd. 565 —  —  (160 ) 181 —  —  586 Anjwa Smart Farm & Solar City Co., Ltd. 6,784 —  —  —  1,878 —  —  8,662 Daewon Green Energy Co., Ltd. 3,877 —  —  —  608 —  —  4,485 G.GURU Co., Ltd. 403 —  —  —  (103 ) —  —  300 UD4M Co., Ltd. 144 —  —  —  17 —  —  161 Dongbu Highway Solar Co., Ltd. 265 —  —  —  87 —  —  352 Seobu Highway Solar Co., Ltd. 289 —  —  —  27 —  —  316 Korea Energy Data Co., Ltd. 62 —  —  —  —  —  —  62 Gangneung Sacheon Fuel Cell Co., Ltd. 1,878 3,745 —  —  (1,310 ) (36 ) —  4,277 KOSTURE Co., Ltd. —  1 —  —  —  —  —  1 Digital Innovation Growth Fund 9,890 —  —  —  (204 ) —  (9,686 ) —  Taebaek Gadeoksan Wind Power Co., Ltd. 16,495 —  —  (1,784 ) 5,644 —  (315 ) 20,040 Chuncheon Green Energy Co., Ltd. 3,372 6,140 —  —  (357 ) —  —  9,155 Yeomsubong Wind Power Co., Ltd. 95 —  —  —  (40 ) —  7 62 Yeongyang Wind Power Corporation II 7,965 —  —  —  (504 ) —  —  7,461 Haeparang Energy Co., Ltd. 2,241 —  —  —  (53 ) —  —  2,188 Saemangeum Sebit Power Plant Co., Ltd. 6,000 7,788 —  —  4,855 —  4,556 23,199 Boulder Solar III, LLC —  715 —  —  —  —  29 744 PlatformN. Co., Ltd. —  105 —  —  (21 ) —  —  84 PT. Cirebon Energi Prasarana —  24,052 —  —  35,315 6,963 2,705 69,035 Green Radiation Co., Ltd. —  —  —  —  (9 ) —  20 11 Future Convergence Technology Laboratory. Co., Ltd. —  76 —  —  (26 ) —  —  50 SC E&G. Co,. Ltd. —  90 —  —  124 —  —  214 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) —  81 —  —  85 —  —  166 ACE —  20 —  —  —  —  —  20 Environment and Energy Co., Ltd. —  11 —  —  (1 ) —  —  10 Santiago Solar Power SpA —  13,853 —  —  (379 ) (100 ) (1 ) 13,373 Yanggu Floating Photovoltaic Power Plant Inc. —  903 —  —  —  —  —  903 5,232,373 95,037 (31,398 ) (599,328 ) 1,091,588 45,268 10,924 5,844,464 2022 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Joint ventures> KEPCO-Uhde Inc. ￦ 58 —  —  —  (43 ) —  2 17 Shuweihat Asia Power Investment B.V. 37,069 —  —  (3,545 ) (1,303 ) 34,231 —  66,452 Shuweihat Asia Operation & Maintenance Company 1,380 —  —  (995 ) 1,154 92 —  1,631 Waterbury Lake Uranium L.P. 21,590 —  —  —  1 159 —  21,750 ASM-BG Investicii AD 18,692 —  (6,255 ) (2,395 ) 2,979 1,534 —  14,555 RES Technology AD 16,703 —  (3,673 ) (333 ) 1,427 1,009 —  15,133 KV Holdings, Inc. 2,527 —  —  (394 ) 7,747 (221 ) —  9,659 KEPCO SPC Power Corporation 198,979 —  —  (34,280 ) 27,591 (12,696 ) —  179,594 Gansu Datang Yumen Wind Power Co., Ltd. 6,635 —  —  —  (464 ) (147 ) —  6,024 Datang Chifeng Renewable Power Co., Ltd. 204,587 —  —  (8,732 ) 2,849 (6,722 ) —  191,982 Datang KEPCO Chaoyang Renewable Power Co., Ltd. 44,217 —  —  (2,694 ) 3,936 (1,061 ) —  44,398 Rabigh Electricity Company 143,678 —  —  (11,447 ) 31,523 50,853 —  214,607 Rabigh Operation & Maintenance Company Limited 4,071 —  —  (2,735 ) 3,866 (89 ) —  5,113 Jamaica Public Service Company Limited 294,649 —  —  (7,752 ) 28,541 19,494 (3,525 ) 331,407 KW Nuclear Components Co., Ltd. 15,734 —  —  (833 ) 2,189 —  —  17,090 Busan Shinho Solar Power Co., Ltd. 5,841 —  —  (478 ) 1,356 —  —  6,719 Global Trade Of Power System Co., Ltd. 597 —  —  —  101 —  —  698 Expressway Solar-light Power Generation Co., Ltd. 3,084 —  —  —  1,670 —  —  4,754 Amman Asia Electric Power Company 178,679 —  —  (19,350 ) 23,442 37,483 —  220,254 KAPES, Inc. —  —  —  —  —  —  —  —  Honam Wind Power Co., Ltd. 4,041 —  —  (174 ) 952 —  —  4,819 Korea Power Engineering Service Co., Ltd. 5,415 —  —  (86 ) 145 —  69 5,543 Chun-cheon Energy Co., Ltd. 25,896 —  —  —  6,148 —  —  32,044 Yeonggwangbaeksu Wind Power Co., Ltd. 2,728 —  —  —  423 —  —  3,151 Nghi Son 2 Power LLC —  172,480 —  —  51,218 185,141 —  408,839 Kelar S.A. 86,695 —  —  —  3,695 21,241 5,506 117,137 PT. Tanjung Power Indonesia 46,546 30,147 —  (6,104 ) 4,645 18,323 (650 ) 92,907 Incheon New Power Co., Ltd. —  —  —  —  198 —  —  198 Seokmun Energy Co., Ltd. 13,842 —  —  —  3,494 —  —  17,336 Daehan Wind Power PSC 5,154 —  —  —  2,446 6,323 —  13,923 Barakah One Company —  —  —  —  —  —  —  —  Nawah Energy Company 294 —  —  —  1 20 —  315 Momentum 368 —  —  (369 ) 345 1 —  345 Daegu Green Power Co., Ltd. 24,054 —  —  —  5,079 —  227 29,360 Yeonggwang Wind Power Co., Ltd. 17,646 —  —  —  3,067 —  —  20,713 Chester Solar IV SpA —  —  —  —  202 (17 ) (4 ) 181 Chester Solar V SpA 25 —  —  —  129 3 (1 ) 156 Diego de Almagro Solar SpA 362 —  —  —  154 2 22 540 South Jamaica Power Company Limited 37,360 —  —  —  6,625 2,452 —  46,437 Daesan Green Energy Co., Ltd. 21,244 —  —  —  (2,030 ) —  4 19,218 RE Holiday Holdings LLC 73,167 —  —  (2,288 ) 2,526 11,965 —  85,370 RE Pioneer Holdings LLC 47,015 —  —  (1,337 ) (275 ) 9,769 —  55,172 RE Barren Ridge 1 Holdings LLC 1,883 —  —  (1,625 ) (2,886 ) 5,978 —  3,350 RE Astoria 2 LandCo LLC 5,998 —  —  (388 ) 571 418 —  6,599 RE Barren Ridge LandCo LLC 2,120 —  —  (160 ) 225 148 —  2,333 Laurel SpA 290 —  —  —  245 3 16 554 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd 3,625 —  —  —  26 —  —  3,651 Chile Solar JV SpA 32,457 —  (24,894 ) —  159 2,097 —  9,819 Cheong-Song Noraesan Wind Power Co., Ltd. 4,106 —  —  (672 ) 832 —  (3 ) 4,263 Chester Solar I SpA 1,120 —  —  —  120 (1 ) 75 1,314 Solar Philippines Calatagan Corporation 58,231 —  —  (1,710 ) 6,081 (5,700 ) —  56,902 Saemangeum Solar Power Co., Ltd. 23,939 —  —  —  (388 ) —  —  23,551 2022 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Joint ventures> Chungsongmeon BongSan wind power Co., Ltd. ￦ 3,808 —  —  —  (338 ) —  —  3,470 Jaeun Resident Wind Power Plant Co., Ltd. 1,958 —  —  —  278 —  —  2,236 DE Energia SpA 8,921 —  —  —  —  615 —  9,536 Dangjin Eco Power Co., Ltd. 26,109 —  —  —  233 513 4 26,859 Haemodum Solar Co., Ltd. 3,081 —  —  —  286 —  —  3,367 Yangyang Wind Power Co., Ltd. 11,191 —  —  —  (327 ) —  —  10,864 HORUS SOLAR, S.A. DE C.V. 5,842 —  —  —  841 293 —  6,976 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. 4,536 —  —  —  68 295 —  4,899 SUNMEX RENOVABLES, S.A. DE C.V. 1,610 —  —  —  (151 ) 198 —  1,657 Stavro Holding II A.B. 17,627 952 —  —  157 (1,687 ) 122 17,171 Solaseado Solar Power Co., Ltd. 9,891 —  —  —  6,342 —  —  16,233 Yeongam Solar Power Co., Ltd. 6,838 —  —  —  3,041 —  —  9,879 Samsu Wind Power Co., Ltd. 2,828 —  —  —  377 —  —  3,205 Pulau Indah Power Plant Sdn. Bhd. 22,099 —  —  —  1,681 3,034 —  26,814 Sam-Yang Photovoltaic Power Co., Ltd. 4,993 —  —  —  (123 ) —  (4,870 ) —  NH-Amundi Global Infrastructure Investment Private Investment Trust 21 21,456 485 (406 ) (1,415 ) 1,603 —  —  21,723 Shin-han BNPP Private Investment Trust for East-West Sunlight Dream 16,288 —  (687 ) —  (14 ) —  —  15,587 PT Barito Wahana Tenaga 81,595 39 —  —  13,352 42,061 —  137,047 Cheongna Energy Co., Ltd. 11,198 —  —  —  (440 ) —  —  10,758 Naepo Green Energy Co., Ltd. —  —  —  —  —  —  —  —  Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) —  —  —  —  —  —  —  —  OneEnergy Asia Limited 79,700 39,033 —  —  (18,294 ) 71,779 —  172,218 KAS Investment I LLC 15,273 —  —  —  2,426 548 —  18,247 KAS Investment II LLC 15,213 —  —  —  2,082 878 —  18,173 Energyco Co., Ltd. 1,535 —  —  —  655 —  —  2,190 CAES, LLC 18,435 —  —  (217 ) (198 ) 1,756 1,029 20,805 Hapcheon Floating Photovoltaic Power Plant Inc. 6,971 —  —  —  1,500 —  —  8,471 Busan Industrial Solar Power Co., Ltd. 612 —  —  —  556 —  —  1,168 Bitsolar Energy Co., Ltd. 352 —  —  —  —  —  —  352 Pulau Indah O&M Sdn. Bhd. —  —  —  —  —  —  —  —  Guadalupe Solar SpA 659 —  —  —  221 33 —  913 Omisan Wind Power Co., Ltd. 10,633 —  —  —  (222 ) —  —  10,411 Foresight Iberian Solar Group Holding, S.L. 9,743 1,781 —  —  (1,016 ) 3 54 10,565 Yeongwol Eco Wind Co., Ltd. 3,196 —  —  —  (41 ) —  —  3,155 Gurae Resident Power Co., Ltd. 395 —  —  —  (4 ) —  —  391 Cheongju Eco Park Co., Ltd. 5,465 —  —  —  5,025 —  —  10,490 Enel X Midland Photovoltaic, LLC 1,688 —  —  —  168 —  —  1,856 Geumsungsan Wind Power Co., Ltd. 6,053 —  —  —  (2,560 ) —  —  3,493 KEPCO KPS CARABAO Corp. 386 —  —  (104 ) (105 ) —  —  177 Prime Swedish Holding AB 15,441 20,896 —  —  (261 ) —  169 36,245 Goheung New Energy Co., Ltd. 11,708 —  —  —  124 —  —  11,832 Gunsan Land Solar Co., Ltd. 19,317 —  —  —  8,220 7 —  27,544 CapMan Lynx SCA, SICAR 9,976 —  —  —  (10,195 ) 5,173 (4,954 ) —  International Offshore Power Transmission Holding Company Limited —  —  —  —  —  —  —  —  Pyeongchang Wind Power Co., Ltd. —  —  —  —  —  —  14,464 14,464 Eumseong Eco Park Co., Ltd. —  5,741 —  —  (184 ) —  —  5,557 Songsan Green Energy Co., Ltd. —  1,400 —  —  (13 ) —  —  1,387 Changwon Nu-ri Energy Co., Ltd. —  500 —  —  (3 ) —  —  497 2022 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Joint ventures> Hasami Wind Farm Corporation ￦ —  1,596 —  —  (7 ) —  —  1,589 PungBack Wind Farm Corporation —  7,884 —  —  (1,141 ) —  —  6,743 Trumbull Asset Management, LLC —  —  —  —  252 (1 ) (5 ) 246 S-Power Chile SpA —  127 —  —  —  —  —  127 Seungmun Green Energy —  8,973 —  —  120 (39 ) —  9,054 Seobusambo highway photovoltaics Co., Ltd. —  (1 ) —  —  —  —  3,067 3,066 2,239,011 292,033 (35,915 ) (112,612 ) 246,705 507,544 10,818 3,147,584 ￦ 7,471,384 387,070 (67,313 ) (711,940 ) 1,338,293 552,812 21,742 8,992,048 2023 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Associates> Korea Gas Corporation ￦ 2,085,296 —  —  —  (155,819 ) 47,220 (6,054 ) 1,970,643 Korea Electric Power Industrial Development Co., Ltd. 31,078 —  —  (2,156 ) 1,790 —  (1,212 ) 29,500 YTN Co., Ltd. 55,027 —  —  (540 ) (1,147 ) (14 ) (1,023 ) 52,303 Gangwon Wind Power Co., Ltd. 12,158 —  —  (2,272 ) 2,115 —  —  12,001 Hyundai Green Power Co., Ltd. 119,791 —  —  (3,555 ) 2,159 —  (222 ) 118,173 Korea Power Exchange 275,126 —  —  —  4,575 —  (5,415 ) 274,286 Taebaek Wind Power Co., Ltd. 14,501 —  —  —  —  —  (14,501 ) —  Taebaek Guinemi Wind Power Co., Ltd. 13,049 —  —  —  481 —  —  13,530 Daeryun Power Co., Ltd. 26,727 —  —  —  143 (12 ) (24 ) 26,834 KNH Solar Co., Ltd. 2,883 —  —  —  311 —  —  3,194 SPC Power Corporation 70,868 —  —  (2,669 ) 9,667 1,065 —  78,931 Gemeng International Energy Co., Ltd. 578,821 102,854 —  (12,527 ) 41,280 565 (5,181 ) 705,812 PT. Cirebon Electric Power 135,114 —  —  (10,770 ) 7,519 —  2,396 134,259 KNOC Nigerian East Oil Co., Ltd. —  —  —  —  (7 ) (213 ) 220 —  KNOC Nigerian West Oil Co., Ltd. —  —  —  —  (7 ) (196 ) 203 —  PT Wampu Electric Power 37,743 —  —  (3,850 ) (268 ) 224 706 34,555 PT. Bayan Resources TBK 684,719 —  —  (344,360 ) 252,406 26,500 (58 ) 619,207 S-Power Co., Ltd. 141,128 —  —  —  21,637 —  —  162,765 Pioneer Gas Power Limited —  —  —  —  —  —  —  —  Eurasia Energy Holdings —  —  —  —  —  —  —  —  Xe-Pian Xe-Namnoy 115,584 —  —  —  (848 ) 1,642 —  116,378 PT. Mutiara Jawa 3,597 —  —  (459 ) 1,936 94 —  5,168 Samcheok Eco Materials Co., Ltd. —  —  —  —  —  —  —  —  Noeul Green Energy Co., Ltd. —  —  —  —  —  —  —  —  Goseong Green Power Co., Ltd. 288,893 —  —  —  (1,240 ) —  (29 ) 287,624 Gangneung Eco Power Co., Ltd. —  258,100 —  —  (3,171 ) —  —  254,929 Shin Pyeongtaek Power Co., Ltd. 133,823 —  —  (70,040 ) 81,258 —  (15 ) 145,026 Haeng Bok Do Si Photovoltaic Power Co., Ltd. 278 —  —  —  16 —  —  294 Dongducheon Dream Power Co., Ltd. 89,300 —  —  —  (2,568 ) —  471 87,203 Jinbhuvish Power Generation Pvt. Ltd. —  —  —  —  —  —  —  —  Daejung Offshore Wind Power Co., Ltd. 1,555 —  —  —  (72 ) —  —  1,483 GS Donghae Electric Power Co., Ltd. 260,145 —  —  (21,846 ) 21,240 —  (454 ) 259,085 Daegu Photovoltaic Co., Ltd. 2,849 —  —  (408 ) 363 —  —  2,804 Busan Green Energy Co., Ltd. 4,395 —  —  —  (1,137 ) —  1 3,259 Gunsan Bio Energy Co., Ltd. —  —  —  —  —  —  —  —  2023 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Associates> Hansuwon KNP Co., Ltd. ￦ 280 —  —  —  187 —  —  467 Korea Electric Power Corporation Fund 28,842 —  (2,266 ) —  (2,865 ) (290 ) —  23,421 Energy Infra Asset Management Co., Ltd. 1,184 —  —  (89 ) 118 —  —  1,213 Daegu clean Energy Co., Ltd. 12 —  —  —  —  —  (12 ) —  Yaksu 486 —  —  —  (201 ) —  —  285 Nepal Water & Energy Development Company Private Limited 69,940 40,103 —  —  (325 ) 855 —  110,573 Gwangyang Green Energy Co., Ltd. 25,044 —  —  —  (406 ) —  —  24,638 PND S 1,403 —  —  —  107 —  —  1,510 Hyundai Eco Energy Co., Ltd. 7,631 —  —  (874 ) 1,198 (8 ) —  7,947 YeongGwang Yaksu Wind Electric Co., Ltd. 156 —  —  —  (23 ) —  —  133 Green Energy Electricity Generation Co., Ltd. 1,571 —  —  —  (1,563 ) —  —  8 Korea Energy Solutions Co., Ltd. 93 —  —  —  77 —  —  170 ITR Co., Ltd. —  —  —  —  (33 ) —  33 —  STN Co., Ltd. (formerly, Structure test network Co., Ltd.) 366 —  —  —  25 —  —  391 Namjeongsusang Solar Power Operation Co., Ltd. 373 —  (217 ) —  (156 ) —  —  —  Indeck Niles Development, LLC 302,038 —  —  —  32,067 (3,623 ) 4,919 335,401 Indeck Niles Asset Management, LLC 94 —  —  (337 ) 334 —  2 93 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 6,932 —  (428 ) (373 ) 366 (1 ) —  6,496 Suwon New Power Co., Ltd. 919 —  —  —  103 —  —  1,022 Gwangbaek Solar Power Investment Co., Ltd. 5,133 —  —  (644 ) 666 —  —  5,155 Go deok Clean Energy Co., Ltd. 4,420 —  —  —  303 —  —  4,723 SureDataLab Co., Ltd. 177 —  —  —  (63 ) —  —  114 SEP Co., Ltd. —  —  —  —  —  —  —  —  Hankook Electric Power Information Co., Ltd. 220 —  —  —  (6 ) —  —  214 Tronix Co., Ltd. 66 —  —  —  154 —  —  220 O2&B Global Co., Ltd. 36 —  —  —  (15 ) —  —  21 Muan Sunshine Solar Power Plant Co., Ltd. 2,562 —  —  (340 ) 600 —  —  2,822 Bigeum Resident Photovoltaic Power Co., Ltd. —  —  —  —  (414 ) 414 —  —  Goesan Solar Park Co., Ltd. 2,591 —  —  —  286 —  —  2,877 Saemangeum Heemang Photovoltaic Co., Ltd. 13,010 —  —  —  1,410 —  —  14,420 Bitgoel Eco Energy Co., Ltd. 8,951 —  —  —  3,443 —  —  12,394 Jeju Gimnyeong Wind Power Co., Ltd. 872 —  —  —  (626 ) —  —  246 Seoroseoro Sunny Power Plant Co., Ltd. 859 —  —  —  82 —  —  941 Muan Solar park Co., Ltd. 7,838 —  —  (2,680 ) 1,672 —  —  6,830 YuDang Solar Co., Ltd. 586 —  —  (100 ) 84 —  —  570 Anjwa Smart Farm & Solar City Co., Ltd. 8,662 —  —  (1,400 ) 403 —  —  7,665 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) 4,485 —  —  —  3,294 —  —  7,779 G.GURU Co., Ltd. 300 —  —  —  (133 ) —  —  167 UD4M Co., Ltd. 161 —  —  —  (11 ) —  —  150 Dongbu Highway Solar Co., Ltd. 352 —  —  —  28 —  —  380 Seobu Highway Solar Co., Ltd. 316 —  —  —  90 —  —  406 Korea Energy Data Co., Ltd. 62 —  —  —  (26 ) —  —  36 Gangneung Sacheon Fuel Cell Co., Ltd. 4,277 —  —  —  3,593 —  —  7,870 KOSTURE Co., Ltd. 1 6 —  —  1 —  —  8 2023 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Associates> Taebaek Gadeoksan Wind Power Co., Ltd. ￦ 20,040 —  —  (3,723 ) 3,109 —  —  19,426 Chuncheon Green Energy Co., Ltd. 9,155 —  —  —  (204 ) (51 ) —  8,900 Yeomsubong Wind Power Co., Ltd. 62 1,316 —  —  (507 ) —  —  871 Yeongyang Wind Power Corporation II 7,461 —  —  —  2,639 —  —  10,100 Haeparang Energy Co., Ltd. 2,188 —  —  —  (84 ) —  —  2,104 Saemangeum Sebit Power Plant Co., Ltd. 23,199 7,249 —  —  (709 ) —  7,452 37,191 Boulder Solar III, LLC 744 —  —  —  —  —  10 754 PlatformN. Co., Ltd. 84 —  —  —  (84 ) —  —  —  PT. Cirebon Energi Prasarana 69,035 —  —  —  7,328 (891 ) 1,125 76,597 Green Radiation Co., Ltd. 11 —  —  —  15 —  —  26 Future Convergence Technology Laboratory. Co., Ltd. 50 —  —  —  (14 ) —  —  36 Eco Motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.) 214 —  —  —  53 —  —  267 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) 166 —  —  —  (72 ) —  26 120 ACE 20 —  —  —  (18 ) —  —  2 Environment and Energy Co., Ltd. 10 —  —  —  (1 ) —  —  9 Santiago Solar Power SpA 13,373 —  —  —  (1,522 ) (82 ) —  11,769 Yanggu Floating Photovoltaic Power Plant Inc. 903 —  —  —  (143 ) —  —  760 Power Embedded —  70 —  —  —  —  —  70 Changwon SG Energy Co., Ltd. —  900 —  —  (117 ) —  —  783 Donpyung Technology. Co., Ltd. —  125 —  —  154 —  (25 ) 254 HORANG ENERGY Inc. —  4,240 —  —  (91 ) —  —  4,149 Hoenggye Renewable Energy Co., Ltd —  2,375 —  —  —  —  —  2,375 Haman Green Energy Co., Ltd. —  4,771 —  —  (1,790 ) —  —  2,981 Songsan Green Energy Co., Ltd. —  —  —  —  —  —  8,323 8,323 5,844,464 422,109 (2,911 ) (486,012 ) 334,379 73,198 (8,338 ) 6,176,889 <Joint ventures> KEPCO-Uhde Inc. 17 —  —  —  (10 ) —  (7 ) —  Shuweihat Asia Power Investment B.V. 66,452 —  —  (512 ) (440 ) 4,402 —  69,902 Shuweihat Asia Operation & Maintenance Company 1,631 —  —  (1,077 ) 1,237 27 —  1,818 Waterbury Lake Uranium L.P. 21,750 —  —  —  70 792 —  22,612 ASM-BG 14,555 —  —  (697 ) 680 201 —  14,739 RES Technology AD 15,133 —  —  (697 ) (513 ) 460 —  14,383 KV Holdings, Inc. 9,659 —  —  —  280 161 (4,914 ) 5,186 KEPCO SPC Power Corporation 179,594 —  —  —  13,224 3,726 —  196,544 Gansu Datang Yumen Wind Power Co., Ltd. 6,024 —  —  —  316 (25 ) —  6,315 Datang Chifeng Renewable Power Co., Ltd. 191,982 —  —  (14,293 ) 9,012 38 —  186,739 Datang KEPCO Chaoyang Renewable Power Co., Ltd. 44,398 —  —  (1,771 ) 639 (59 ) —  43,207 Rabigh Electricity Company 214,607 —  —  (6,263 ) 28,456 (1,749 ) —  235,051 Rabigh Operation & Maintenance Company Limited 5,113 —  —  (2,994 ) 2,759 86 —  4,964 Jamaica Public Service Company Limited 331,407 —  —  (15,715 ) 32,862 7,959 (6,647 ) 349,866 KW Nuclear Components Co., Ltd. 17,090 —  —  (833 ) 2,423 —  —  18,680 Busan Shinho Solar Power Co., Ltd. 6,719 —  —  (1,169 ) 1,119 —  —  6,669 Global Trade Of Power System Co., Ltd. 698 —  —  —  (83 ) —  —  615 2023 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Joint ventures> Expressway Solar-light Power Generation Co., Ltd. ￦ 4,754 —  —  —  433 —  —  5,187 Amman Asia Electric Power Company 220,254 —  —  (15,636 ) 17,833 973 —  223,424 KAPES, Inc. —  —  —  (1,162 ) 1,162 —  —  —  Honam Wind Power Co., Ltd. 4,819 —  —  (522 ) 446 —  —  4,743 Korea Power Engineering Service Co., Ltd. 5,543 —  —  (44 ) 349 —  (140 ) 5,708 Chun-cheon Energy Co., Ltd. 32,044 —  —  —  3,039 —  —  35,083 Yeonggwangbaeksu Wind Power Co., Ltd. 3,151 —  —  —  292 —  —  3,443 Nghi Son 2 Power LLC 408,839 —  —  —  14,742 (5,592 ) —  417,989 Kelar S.A. 117,137 —  —  —  11,655 848 1,889 131,529 PT. Tanjung Power Indonesia 92,907 —  —  (12,641 ) 9,679 338 (132 ) 90,151 Incheon New Power Co., Ltd. 198 —  —  (69 ) 147 —  22 298 Seokmun Energy Co., Ltd. 17,336 —  —  —  (745 ) —  —  16,591 Daehan Wind Power PSC 13,923 —  —  —  2,437 66 —  16,426 Barakah One Company —  —  —  —  —  —  —  —  Nawah Energy Company 315 —  —  —  10 5 —  330 MOMENTUM 345 —  —  (365 ) 208 21 —  209 Daegu Green Power Co., Ltd. 29,360 —  —  —  (2,856 ) —  (74 ) 26,430 Yeonggwang Wind Power Co., Ltd. 20,713 —  —  (2,688 ) 5,355 —  —  23,380 Chester Solar IV SpA 181 —  —  —  324 (21 ) —  484 Chester Solar V SpA 156 —  —  —  35 (3 ) 3 191 Diego de Almagro Solar SpA 540 —  —  —  447 (37 ) 4 954 South Jamaica Power Company Limited 46,437 —  —  (7,667 ) 3,709 630 —  43,109 Daesan Green Energy Co., Ltd. 19,218 —  —  —  2,977 —  (4 ) 22,191 RE Holiday Holdings LLC 85,370 —  —  (1,549 ) (1,425 ) 1,696 —  84,092 RE Pioneer Holdings LLC 55,172 —  —  (1,162 ) (2,089 ) 2,160 —  54,081 RE Barren Ridge 1 Holdings LLC 3,350 —  —  (3,087 ) (1,733 ) 59,624 —  58,154 RE Astoria 2 LandCo LLC 6,599 —  —  (354 ) 575 117 —  6,937 RE Barren Ridge LandCo LLC 2,333 —  —  (161 ) 228 41 —  2,441 Laurel SpA 554 —  —  —  64 (14 ) 9 613 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd 3,651 —  —  —  (23 ) 91 —  3,719 Chile Solar JV SpA 9,819 —  —  —  3,569 1,276 (14,664 ) —  Cheong-Song Noraesan Wind Power Co., Ltd. 4,263 —  —  (865 ) 358 —  —  3,756 Chester Solar I SpA 1,314 —  —  —  (71 ) (29 ) 24 1,238 Solar Philippines Calatagan Corporation 56,902 —  —  (6,025 ) 6,025 1,228 —  58,130 Saemangeum Solar Power Co., Ltd. 23,551 —  —  —  (132 ) —  —  23,419 Chungsongmeon BongSan wind power Co., Ltd. 3,470 —  —  —  (805 ) —  —  2,665 Jaeun Resident Wind Power Plant Co., Ltd. 2,236 —  —  —  (22 ) —  —  2,214 DE Energia SpA 9,536 —  —  —  —  167 —  9,703 Dangjin Eco Power Co., Ltd. 26,859 —  —  —  212 (318 ) —  26,753 Haemodum Solar Co., Ltd. 3,367 —  —  (392 ) 147 —  —  3,122 Yangyang Wind Power Co., Ltd. 10,864 —  —  —  (429 ) —  —  10,435 HORUS SOLAR, S.A. DE C.V. 6,976 —  —  —  3,594 611 —  11,181 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. 4,899 —  —  —  4,088 1,948 —  10,935 SUNMEX RENOVABLES, S.A. DE C.V. 1,657 —  —  —  1,482 402 —  3,541 Stavro Holding II A.B. 17,171 —  —  —  (17 ) 149 960 18,263 Solaseado Solar Power Co., Ltd. 16,233 —  —  —  1,720 —  —  17,953 Yeongam Solar Power Co., Ltd. 9,879 —  —  (592 ) 350 —  —  9,637 Samsu Wind Power Co., Ltd. 3,205 —  —  (514 ) 331 —  —  3,022 2023 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Joint ventures> Pulau Indah Power Plant Sdn. Bhd. ￦ 26,814 —  —  (27 ) 671 (2,360 ) 505 25,603 NH-Amundi 21,723 928 (1,092 ) (1,568 ) 1,906 —  —  21,897 Shin-han 15,587 —  (96 ) —  (4 ) —  —  15,487 PT Barito Wahana Tenaga 137,047 —  —  —  20,546 (599 ) —  156,994 Cheongna Energy Co., Ltd. 10,758 —  —  —  14,791 —  —  25,549 Naepo Green Energy Co., Ltd. —  —  —  —  5,285 —  —  5,285 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) —  —  —  —  —  —  —  —  OneEnergy Asia Limited 172,218 79,182 —  —  39,091 (525 ) —  289,966 KAS INVESTMENT I LLC 18,247 —  —  —  (2,223 ) (240 ) —  15,784 KAS INVESTMENT II LLC 18,173 —  —  —  (2,225 ) (239 ) —  15,709 Energyco Co., Ltd. 2,190 —  —  —  (50 ) —  —  2,140 CAES, LLC 20,805 —  —  —  (860 ) 114 321 20,380 Hapcheon Floating Photovoltaic Power Plant Inc. 8,471 —  —  —  1,877 —  —  10,348 Busan Industrial Solar Power Co., Ltd. 1,168 —  —  —  (110 ) —  —  1,058 Bitsolar Energy Co., Ltd. 352 —  —  —  —  —  —  352 Pulau Indah O&M Sdn. Bhd. —  —  —  —  —  —  —  —  Guadalupe Solar SpA 913 —  —  —  322 (35 ) —  1,200 Omisan Wind Power Co., Ltd. 10,411 —  —  —  (182 ) —  —  10,229 Foresight Iberian Solar Group Holding, S.L. 10,565 —  —  —  (2,034 ) —  (412 ) 8,119 Yeongwol Eco Wind Co., Ltd. 3,155 —  —  —  869 —  —  4,024 Gurae Resident Power Co., Ltd. 391 —  —  —  178 —  —  569 Cheongju Eco Park Co., Ltd. 10,490 —  —  —  (1,418 ) —  —  9,072 Enel X Midland Photovoltaic, LLC 1,856 516 —  —  170 —  —  2,542 Geumsungsan Wind Power Co., Ltd. 3,493 —  —  —  2,022 —  —  5,515 KEPCO KPS CARABAO Corp. 177 —  —  —  (184 ) 7 —  —  Prime Swedish Holding AB 36,245 820 —  —  (236 ) —  1,960 38,789 Goheung New Energy Co., Ltd. 11,832 —  —  —  3,904 —  —  15,736 Gunsan Land Solar Co., Ltd. 27,544 —  —  —  (5,115 ) —  —  22,429 CapMan Lynx SCA, SICAR —  —  —  —  —  —  —  —  International Offshore Power Transmission Holding Company Limited —  —  —  —  338 1,085 —  1,423 Pyeongchang Wind Power Co., Ltd. 14,464 —  —  (870 ) (1,366 ) —  —  12,228 Eumseong Eco Park Co., Ltd. 5,557 —  —  —  2,829 —  —  8,386 Songsan Green Energy Co., Ltd. 1,387 7,000 —  —  (25 ) (39 ) (8,323 ) —  Changwon Nu-ri 497 7,595 —  —  (27 ) (38 ) —  8,027 Hasami Wind Farm Corporation 1,589 —  (1,586 ) —  (3 ) —  —  —  PungBack Wind Farm Corporation 6,743 —  —  —  1,197 —  —  7,940 Trumbull Asset Management, LLC 246 1 —  —  693 —  (4 ) 936 S-Power 127 —  —  —  (70 ) 4 3 64 Seungmun Green Energy 9,054 —  —  —  703 —  —  9,757 Seobusambo highway photovoltaics Co., Ltd. 3,066 —  —  —  514 —  —  3,580 Yangyang Suri Wind Power Co., Ltd. —  10,498 —  —  (890 ) —  —  9,608 Kepco for Power Company —  3,083 —  —  (2,109 ) 25 (564 ) 435 Taebaek Wind Power Co., Ltd. —  —  —  (2,820 ) 2,251 —  14,501 13,932 Jeonju Bio Green Energy Co., Ltd. —  3,250 —  —  (55 ) —  —  3,195 2023 Investees Beginning Acquisitions Disposals Dividends Share of (loss) Other (loss) Others Ending In millions of won <Joint ventures> Kumyang Eco Park Co., Ltd. ￦ —  3,663 —  —  —  —  —  3,663 Jeongeup Green Power Co., Ltd. —  1,560 —  —  —  —  —  1,560 Hadong E-factory —  350 —  —  —  (1 ) —  349 Namyangju Combined Heat and Power Co., Ltd. —  3,850 —  —  —  —  —  3,850 Wadi Noor Solar Power Company SAOC —  847 —  —  —  (1 ) —  846 Fairhaven Energy Storage LLC —  —  —  —  —  —  —  —  3,147,584 123,143 (2,774 ) (106,801 ) 260,677 79,554 (15,684 ) 3,485,699 ￦ 8,992,048 545,252 (5,685 ) (592,813 ) 595,056 152,752 (24,022 ) 9,662,588
Summary of Financial Information of Associates and Joint Ventures	(4) Summary of financial information of associates and joint ventures as of and for the years ended December 31, 2022 and 2023 are as follows: 2022 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Associates> Korea Gas Corporation ￦ 62,424,983 52,014,243 51,724,287 1,497,008 Korea Electric Power Industrial Development Co., Ltd. 148,112 40,946 336,333 15,434 YTN Co., Ltd. 364,115 107,324 152,187 7,250 Gangwon Wind Power Co., Ltd. 86,758 6,029 40,130 20,163 Hyundai Green Power Co., Ltd. 773,998 360,926 105,374 5,010 Korea Power Exchange 311,691 36,564 118,501 1,036 Taebaek Wind Power Co., Ltd. 27,562 3,394 7,565 551 Taebaek Guinemi Wind Power Co., Ltd. 44,036 28,709 6,793 1,906 Daeryun Power Co., Ltd. 1,201,510 799,370 472,211 4,999 KNH Solar Co., Ltd. 13,584 2,905 4,348 2,173 SPC Power Corporation 254,951 26,417 80,630 25,614 Gemeng International Energy Co., Ltd. 7,796,180 5,460,183 3,183,398 11,637 PT. Cirebon Electric Power 691,311 199,987 287,261 53,730 KNOC Nigerian East Oil Co., Ltd. 26,491 109,974 —  (72 ) KNOC Nigerian West Oil Co., Ltd. 28,537 105,292 —  (72 ) PT Wampu Electric Power 209,815 127,764 21,773 12,713 PT. Bayan Resources TBK 4,994,538 2,518,129 6,076,844 3,042,123 S-Power Co., Ltd. 937,067 646,411 1,091,425 37,104 Pioneer Gas Power Limited 271,340 477,127 —  (46,290 ) Eurasia Energy Holdings 648 1,156 —  —  Xe-Pian Xe-Namnoy Power Co., Ltd. 1,371,292 904,907 174,693 61,020 PT. Mutiara Jawa 26,024 13,622 15,421 4,912 Samcheok Eco Materials Co., Ltd. 24,952 1,609 11,907 (1,127 ) Noeul Green Energy Co., Ltd. 82,611 101,472 23,493 (31,970 ) Goseong Green Power Co., Ltd. 5,518,258 4,516,607 1,999,825 26,981 Gangneung Eco Power Co., Ltd. 4,907,872 4,900,408 435,755 (142,387 ) Shin Pyeongtaek Power Co., Ltd. 1,203,406 839,568 957,062 100,554 Haeng Bok Do Si Photovoltaic Power Co., Ltd. 1,788 802 558 200 Dongducheon Dream Power Co., Ltd. 1,521,089 1,219,018 2,240,175 43,072 Jinbhuvish Power Generation Pvt. Ltd. 60,477 12,489 —  —  2022 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Associates> Daejung Offshore Wind Power Co., Ltd. ￦ 5,350 2,013 —  (228 ) GS Donghae Electric Power Co., Ltd. 2,130,287 1,365,156 1,053,112 46,226 Daegu Photovoltaic Co., Ltd. 13,254 3,431 4,755 2,914 Busan Green Energy Co., Ltd. 168,588 153,432 72,290 (7,409 ) Gunsan Bio Energy Co., Ltd. 8,397 29,524 —  (649 ) Hansuwon KNP Co., Ltd. 1,887 368 2,149 210 Korea Electric Power Corporation Fund 29,530 130 8,034 7,854 Energy Infra Asset Management Co., Ltd. 12,874 918 4,954 1,354 Daegu clean Energy Co., Ltd. 368 324 —  (1 ) Yaksu 5,984 4,314 851 (146 ) Nepal Water & Energy Development Company Private Limited 241,061 141,199 70,923 (1,364 ) Gwangyang Green Energy Co., Ltd. 170,390 45,260 —  (1,923 ) PND S 36,174 31,868 5,940 217 Hyundai Eco Energy Co., Ltd. 181,566 142,533 29,209 10,270 YeongGwang Yaksu Wind Electric Co., Ltd. 40,712 39,924 6,628 1,480 Green Energy Electricity Generation Co., Ltd. 75,033 72,300 1,404 (488 ) Korea Energy Solutions Co., Ltd. 843 377 437 (185 ) ITR Co., Ltd. 446 472 188 (190 ) STN Co., Ltd. (formerly, Structure test network Co., Ltd.) 1,948 383 732 202 Namjeongsusang Solar Power Operation Co., Ltd. 55,616 53,261 7,724 83 Indeck Niles Development, LLC 1,178,303 762,139 302,041 (22,541 ) Indeck Niles Asset Management, LLC 299 16 1,863 1,136 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 14,356 210 826 796 Suwon New Power Co., Ltd. 2,142 164 —  11 Gwangbaek Solar Power Investment Co., Ltd. 307,864 296,915 10,270 743 Go deok Clean Energy Co., Ltd. 71,431 60,382 —  (1,101 ) SureDataLab Co., Ltd. 879 140 938 203 SEP Co., Ltd. 38 103 —  (98 ) Hankook Electric Power Information Co., Ltd. 2,334 997 1,797 392 Tronix Co., Ltd. 2,880 2,354 1,938 (226 ) O2&B Global Co., Ltd. 419 238 220 5 Muan Sunshine Solar Power Plant Co., Ltd. 142,911 132,573 19,591 6,467 Bigeum Resident Photovoltaic Power Co., Ltd. 107,690 109,229 —  (537 ) Goesan Solar Park Co., Ltd. 52,235 43,299 7,642 2,292 Saemangeum Heemang Photovoltaic Co., Ltd. 160,695 125,635 29,543 6,481 Bitgoel Eco Energy Co., Ltd. 85,236 66,987 10,054 3,229 Jeju Gimnyeong Wind Power Co., Ltd. 63,471 60,564 12,231 (130 ) Seoroseoro Sunny Power Plant Co., Ltd. 7,015 5,045 1,157 247 Muan Solar park Co., Ltd. 225,894 188,329 36,081 11,339 YuDang Solar Co., Ltd. 22,073 19,144 3,997 957 Anjwa Smart Farm & Solar City Co., Ltd. 278,806 239,581 42,477 9,672 Daewon Green Energy Co., Ltd. 141,974 124,460 45,095 4,037 G.GURU Co., Ltd. 1,228 12 478 (423 ) UD4M Co., Ltd. 1,322 197 1,109 59 Dongbu Highway Solar Co., Ltd. 17,935 16,426 2,901 439 Seobu Highway Solar Co., Ltd. 18,236 16,655 3,052 138 Korea Energy Data Co., Ltd. 339 128 308 5 Gangneung Sacheon Fuel Cell Co., Ltd. 108,688 98,470 —  (2,720 ) KOSTURE Co., Ltd. 180 24 293 32 Taebaek Gadeoksan Wind Power Co., Ltd. 197,944 139,004 31,534 19,406 Chuncheon Green Energy Co., Ltd. 159,151 138,925 —  (858 ) Yeomsubong Wind Power Co., Ltd. 4,369 2,829 —  (859 ) 2022 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Associates> Yeongyang Wind Power Corporation II ￦ 104,821 86,984 —  (1,678 ) Haeparang Energy Co., Ltd. 19,394 10,721 —  (211 ) Saemangeum Sebit Power Plant Co., Ltd. 167,822 131,383 23,159 7,742 Boulder Solar III, LLC 1,896 —  —  —  PlatformN. Co., Ltd. 379 94 486 (70 ) PT. Cirebon Energi Prasarana 3,361,288 2,670,941 319,986 36,451 Green Radiation Co., Ltd. 111 34 89 (93 ) Future Convergence Technology Laboratory. Co., Ltd. 551 302 9 (130 ) SC E&G. Co,. Ltd. 1,199 131 1,048 609 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) 1,275 447 754 499 ACE 100 —  —  —  Environment and Energy Co., Ltd. 93 —  —  (7 ) Santiago Solar Power SpA 56,138 29,390 —  (2,943 ) Yanggu Floating Photovoltaic Power Plant Inc. 3,115 —  —  —  <Joint ventures> KEPCO-Uhde Inc. 48 15 —  (84 ) Shuweihat Asia Power Investment B.V. 135,646 29 —  (2,660 ) Shuweihat Asia Operation & Maintenance Company 3,037 71 3,013 2,099 Waterbury Lake Uranium L.P. 66,706 117 —  —  ASM-BG Investicii AD 72,999 43,889 16,056 6,230 RES Technology AD 62,345 32,079 11,205 3,018 KV Holdings, Inc. 24,149 1 1 353 KEPCO SPC Power Corporation 267,904 29,082 253,145 44,751 Gansu Datang Yumen Wind Power Co., Ltd. 67,651 52,592 10,048 (1,161 ) Datang Chifeng Renewable Power Co., Ltd. 835,331 355,377 140,343 42,889 Datang KEPCO Chaoyang Renewable Power Co., Ltd. 168,680 57,685 29,459 4,919 Rabigh Electricity Company 2,520,946 1,855,836 322,108 65,550 Rabigh Operation & Maintenance Company Limited 23,664 10,882 32,572 9,176 Jamaica Public Service Company Limited 2,310,611 1,515,361 1,499,897 69,458 KW Nuclear Components Co., Ltd. 40,381 2,013 16,968 6,755 Busan Shinho Solar Power Co., Ltd. 36,868 9,991 10,543 5,424 Global Trade Of Power System Co., Ltd. 5,628 3,222 8,434 351 Expressway Solar-light Power Generation Co., Ltd. 14,248 4,740 3,711 1,654 Amman Asia Electric Power Company 759,885 392,795 28,665 39,090 KAPES, Inc. 82,943 45,068 20,006 3,797 Honam Wind Power Co., Ltd. 34,028 17,522 8,781 3,283 Korea Power Engineering Service Co., Ltd. 20,931 1,817 9,176 500 Chun-cheon Energy Co., Ltd. 629,202 521,212 585,641 19,940 Yeonggwangbaeksu Wind Power Co., Ltd. 80,042 59,070 14,150 2,764 Nghi Son 2 Power LLC 3,652,801 2,835,123 589,023 102,436 Kelar S.A. 689,802 514,085 107,577 943 PT. Tanjung Power Indonesia 730,239 464,791 99,169 13,619 Incheon New Power Co., Ltd. 2,633 755 4,497 1,244 Seokmun Energy Co., Ltd. 212,509 152,731 61,513 12,064 Daehan Wind Power PSC 145,065 117,219 17,958 5,524 Barakah One Company 33,587,352 34,422,965 498,129 (444,338 ) Nawah Energy Company 338,883 337,134 395,580 3 Momentum 7,315 6,280 30,864 1,036 Daegu Green Power Co., Ltd. 551,431 459,881 516,254 9,364 Yeonggwang Wind Power Co., Ltd. 233,695 189,737 31,221 6,700 Chester Solar IV SpA 12,728 12,469 1,521 (174 ) Chester Solar V SpA 4,364 4,315 520 83 2022 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Joint ventures> Diego de Almagro Solar SpA ￦ 15,908 14,946 1,877 (288 ) South Jamaica Power Company Limited 521,558 289,359 314,064 33,348 Daesan Green Energy Co., Ltd. 245,826 190,918 101,689 (6,641 ) RE Holiday Holdings LLC 351,243 180,503 22,671 3,022 RE Pioneer Holdings LLC 263,232 152,888 15,701 369 RE Barren Ridge 1 Holdings LLC 226,504 100,436 11,740 (903 ) RE Astoria 2 LandCo LLC 13,517 319 1,004 913 RE Barren Ridge LandCo LLC 4,761 95 389 357 Laurel SpA 11,221 10,447 1,424 54 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd 29,517 74 —  (260 ) Chile Solar JV SpA 75,246 55,609 7,842 6,425 Cheong-Song Noraesan Wind Power Co., Ltd. 55,948 41,464 7,988 1,916 Chester Solar I SpA 13,246 10,933 1,094 (221 ) Solar Philippines Calatagan Corporation 113,327 36,756 17,728 10,194 Saemangeum Solar Power Co., Ltd. 35,890 6,817 —  (479 ) Chungsongmeon BongSan wind power Co., Ltd. 81,030 75,207 —  (1,120 ) Jaeun Resident Wind Power Plant Co., Ltd. 89,756 82,047 —  (190 ) DE Energia SpA 48,350 62,481 5,959 (1,109 ) Dangjin Eco Power Co., Ltd. 98,714 20,721 4,185 700 Haemodum Solar Co., Ltd. 22,974 16,103 2,556 581 Yangyang Wind Power Co., Ltd. 107,471 85,829 —  (634 ) HORUS SOLAR, S.A. DE C.V. 156,436 133,714 5,568 5,628 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. 173,262 155,009 468 457 SUNMEX RENOVABLES, S.A. DE C.V. 129,502 118,449 —  (1,008 ) Stavro Holding II A.B. 85,883 27 —  61 Solaseado Solar Power Co., Ltd. 363,492 325,262 51,198 16,301 Yeongam Solar Power Co., Ltd. 329,714 281,791 44,568 8,563 Samsu Wind Power Co., Ltd. 71,123 54,254 10,118 1,987 Pulau Indah Power Plant Sdn. Bhd. 760,536 675,853 797 6,723 NH-Amundi Global Infrastructure Investment Private Investment Trust 21 71,851 74 4,850 5,431 Shin-han BNPP Private Investment Trust for East-West Sunlight Dream 17,341 22 38 (10 ) PT Barito Wahana Tenaga 447,688 —  —  49,471 Cheongna Energy Co., Ltd. 385,935 368,340 100,200 (889 ) Naepo Green Energy Co., Ltd. 448,309 499,528 8,905 (34,347 ) Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) 470,677 530,304 278,363 (12,893 ) OneEnergy Asia Limited 1,039,987 673,223 —  16,041 KAS Investment I LLC 61,907 861 1,603 6,998 KAS Investment II LLC 61,661 861 1,592 6,967 Energyco Co., Ltd. 56,996 52,304 7,898 2,258 CAES, LLC 49,676 6 —  (547 ) Hapcheon Floating Photovoltaic Power Plant Inc. 78,768 61,561 12,705 3,061 Busan Industrial Solar Power Co., Ltd. 21,149 18,016 3,190 901 Bitsolar Energy Co., Ltd. 78,779 83,324 9,557 261 Pulau Indah O&M Sdn. Bhd. —  —  —  —  Guadalupe Solar SpA 10,148 8,790 924 (43 ) Omisan Wind Power Co., Ltd. 142,274 117,881 —  (519 ) Foresight Iberian Solar Group Holding, S.L. 94,181 81,997 —  (1,365 ) Yeongwol Eco Wind Co., Ltd. 87,856 83,281 —  (144 ) Gurae Resident Power Co., Ltd. 11,649 10,467 —  (19 ) Cheongju Eco Park Co., Ltd. 152,139 116,639 66,260 17,319 Enel X Midland Photovoltaic, LLC 10,289 1,010 1,684 837 Geumsungsan Wind Power Co., Ltd. 125,324 115,196 —  (1,770 ) 2022 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Joint ventures> KEPCO KPS CARABAO Corp. ￦ 2,025 1,582 611 (327 ) Prime Swedish Holding AB 77,942 114 —  (577 ) Goheung New Energy Co., Ltd. 136,682 113,393 —  (1,591 ) Gunsan Land Solar Co., Ltd. 158,371 121,785 28,828 12,154 CapMan Lynx SCA, SICAR 112,718 102,810 504 (16,780 ) International Offshore Power Transmission Holding Company Limited 4,680 71,468 —  (68,093 ) Pyeongchang Wind Power Co., Ltd. 70,599 45,661 14,524 3,693 Eumseong Eco Park Co., Ltd. 136,909 119,736 —  (636 ) Songsan Green Energy Co., Ltd. 5,500 —  —  (69 ) Changwon Nu-ri Energy Co., Ltd. 1,490 —  —  (10 ) Hasami Wind Farm Corporation 3,100 —  —  (23 ) PungBack Wind Farm Corporation 46,957 31,667 —  (3,089 ) Trumbull Asset Management, LLC 316 —  656 323 S-Power Chile SpA 2,430 2,450 1,334 22 Seungmun Green Energy 46,283 18,843 —  367 Seobusambo highway photovoltaics Co., Ltd. 8,286 4,453 217 265 2023 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Associates> Korea Gas Corporation ￦ 57,254,666 47,428,628 44,555,995 (747,428 ) Korea Electric Power Industrial Development Co., Ltd. 174,788 73,065 354,850 21,170 YTN Co., Ltd. 352,188 108,108 130,450 (3,616 ) Gangwon Wind Power Co., Ltd. 83,062 3,380 32,525 14,098 Hyundai Green Power Co., Ltd. 738,107 330,616 107,367 7,446 Korea Power Exchange 366,092 91,806 119,182 4,443 Taebaek Guinemi Wind Power Co., Ltd. 42,243 26,200 5,529 716 Daeryun Power Co., Ltd. 1,120,453 716,752 451,527 4,043 KNH Solar Co., Ltd. 12,142 314 3,535 1,394 SPC Power Corporation 287,249 28,485 106,926 27,946 Gemeng International Energy Co., Ltd. 7,507,274 5,189,729 2,963,614 33,580 PT. Cirebon Electric Power 665,365 177,150 265,054 27,341 KNOC Nigerian East Oil Co., Ltd. 27,029 112,017 —  (50 ) KNOC Nigerian West Oil Co., Ltd. 29,157 107,300 —  (50 ) PT Wampu Electric Power 206,943 131,823 20,155 (582 ) PT. Bayan Resources TBK 4,447,335 2,018,870 4,675,174 1,670,522 S-Power 762,398 427,807 1,012,050 44,730 Pioneer Gas Power Limited 274,693 532,005 551 (49,745 ) Xe-Pian Xe-Namnoy 1,370,110 900,713 171,978 (5,674 ) PT. Mutiara Jawa 27,296 9,474 16,160 7,999 Samcheok Eco Materials Co., Ltd. 22,544 39,895 8,028 (1,776 ) Noeul Green Energy Co., Ltd. 89,861 107,834 24,017 920 Goseong Green Power Co., Ltd. 5,374,233 4,372,531 1,580,545 152 Gangneung Eco Power Co., Ltd. 5,381,984 4,665,083 1,419,436 (7,388 ) Shin Pyeongtaek Power Co., Ltd. 1,222,968 832,633 1,040,219 201,635 Haeng Bok Do Si Photovoltaic Power Co., Ltd. 1,618 573 575 82 Dongducheon Dream Power Co., Ltd. 1,337,529 1,042,681 1,744,247 (8,608 ) Jinbhuvish Power Generation Pvt. Ltd. 61,227 12,644 —  —  Daejung Offshore Wind Power Co., Ltd. 5,277 2,094 —  (145 ) GS Donghae Electric Power Co., Ltd. 1,932,098 1,170,085 876,826 62,471 Daegu Photovoltaic Co., Ltd. 14,140 4,471 4,225 1,772 Busan Green Energy Co., Ltd. 160,299 149,060 69,108 (3,920 ) Hansuwon KNP Co., Ltd. 3,063 899 7,618 645 Korea Electric Power Corporation Fund 23,981 108 332 (2,921 ) Energy Infra Asset Management Co., Ltd. 13,628 1,371 5,130 1,254 Daegu clean Energy Co., Ltd. 368 324 —  (1 ) Yaksu 5,697 4,717 508 (691 ) Nepal Water & Energy Development Company Private Limited 327,057 167,792 82,720 (3,186 ) Gwangyang Green Energy Co., Ltd. 370,778 247,675 —  (2,034 ) PND S 34,804 30,127 5,413 373 Hyundai Eco Energy Co., Ltd. 169,180 128,481 26,266 7,206 YeongGwang Yaksu Wind Electric Co., Ltd. 38,720 38,173 5,593 (241 ) Green Energy Electricity Generation Co., Ltd. 69,667 72,325 948 (5,392 ) Korea Energy Solutions Co., Ltd. 1,151 303 643 87 ITR Co., Ltd. 480 490 144 (234 ) STN Co., Ltd. (formerly, Structure test network Co., Ltd.) 1,818 127 771 178 Indeck Niles Development, LLC 1,157,838 675,638 318,392 64,813 Indeck Niles Asset Management, LLC 307 29 1,081 1,001 Hanwha Corporation-linked Sunlight Power Special Private Equity 13,444 186 820 747 Suwon New Power Co., Ltd. 3,448 1,130 2,318 341 Gwangbaek Solar Power Investment Co., Ltd. 287,838 276,840 11,267 1,513 Go deok Clean Energy Co., Ltd. 139,352 127,545 22,671 2,426 SureDataLab Co., Ltd. 890 416 548 (263 ) 2023 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Associates> SEP Co., Ltd. ￦ 45 117 —  (7 ) Hankook Electric Power Information Co., Ltd. 2,270 974 1,672 223 Tronix Co., Ltd. 4,564 2,807 2,718 578 O2&B Global Co., Ltd. 369 264 242 (73 ) Muan Sunshine Solar Power Plant Co., Ltd. 136,382 124,745 16,360 2,999 Bigeum Resident Photovoltaic Power Co., Ltd. 303,462 309,185 —  (3,031 ) Goesan Solar Park Co., Ltd. 50,659 40,738 6,530 985 Saemangeum Heemang Photovoltaic Co., Ltd. 152,496 113,407 23,448 4,063 Bitgoel Eco Energy Co., Ltd. 85,571 60,302 29,907 7,019 Jeju Gimnyeong Wind Power Co., Ltd. 56,906 56,087 9,261 (2,088 ) Seoroseoro Sunny Power Plant Co., Ltd. 6,813 4,650 1,039 193 Muan Solar park Co., Ltd. 204,168 171,642 31,532 8,648 YuDang Solar Co., Ltd. 20,566 17,717 3,483 420 Anjwa Smart Farm & Solar City Co., Ltd. 258,076 223,831 37,742 3,119 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) 143,157 112,651 58,423 13,407 G.GURU Co., Ltd. 818 142 162 (540 ) UD4M Co., Ltd. 1,242 194 1,066 (59 ) Dongbu Highway Solar Co., Ltd. 16,563 14,913 2,580 140 Seobu Highway Solar Co., Ltd. 16,739 14,707 2,646 451 Korea Energy Data Co., Ltd. 313 191 348 (87 ) Gangneung Sacheon Fuel Cell Co., Ltd. 138,761 119,779 23,523 9,191 KOSTURE Co., Ltd. 196 22 208 16 Taebaek Gadeoksan Wind Power Co., Ltd. 196,810 139,675 35,000 13,138 Chuncheon Green Energy Co., Ltd. 217,335 197,676 6,052 (497 ) Yeomsubong Wind Power Co., Ltd. 32,742 30,586 —  (1,753 ) Yeongyang Wind Power Corporation II 133,053 106,419 15,190 8,797 Haeparang Energy Co., Ltd. 40,698 32,359 —  (335 ) Saemangeum Sebit Power Plant Co., Ltd. 165,283 97,997 22,663 (812 ) Boulder Solar III, LLC 1,929 —  —  —  PlatformN. Co., Ltd. 184 394 404 (566 ) PT. Cirebon Energi Prasarana 3,372,539 2,606,566 434,806 73,285 Green Radiation Co., Ltd. 1,038 812 298 100 Future Convergence Technology Laboratory. Co., Ltd. 479 302 —  (70 ) Eco Motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.) 1,664 329 633 372 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) 1,801 1,081 856 —  ACE 385 348 53 (30 ) Environment and Energy Co., Ltd. 89 —  —  (4 ) Santiago Solar Power SpA 88,687 65,149 —  (2,994 ) Yanggu Floating Photovoltaic Power Plant Inc. 17,092 14,470 135 (495 ) Power Embedded 298 2 —  (2 ) Changwon SG Energy Co., Ltd. 5,738 1,649 436 (703 ) Donpyung Technology. Co., Ltd. 2,039 643 1,664 93 HORANG ENERGY Inc. 64,736 54,923 —  (389 ) Hoenggye Renewable Energy Co., Ltd 24,702 25,730 —  (4,864 ) Haman Green Energy Co., Ltd. 40,801 32,285 —  (5,116 ) Songsan Green Energy Co., Ltd. 46,016 32,262 —  (100 ) <Joint ventures> Shuweihat Asia Power Investment B.V. 142,680 20 —  897 Shuweihat Asia Operation & Maintenance Company 4,421 1,116 3,194 2,249 Waterbury Lake Uranium L.P. 74,320 550 —  —  ASM-BG 68,837 39,359 10,931 1,359 2023 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Joint ventures> RES Technology AD ￦ 58,152 29,387 5,969 (1,027 ) KV Holdings, Inc. 12,968 2 20 367 KEPCO SPC Power Corporation 288,140 26,778 222,773 17,270 Gansu Datang Yumen Wind Power Co., Ltd. 61,657 45,869 10,684 791 Datang Chifeng Renewable Power Co., Ltd. 812,124 345,277 117,833 25,055 Datang KEPCO Chaoyang Renewable Power Co., Ltd. 166,959 58,942 23,638 1,597 Rabigh Electricity Company 2,556,848 1,855,234 304,727 51,539 Rabigh Operation & Maintenance Company Limited 40,339 27,928 31,301 6,676 Jamaica Public Service Company Limited 2,332,019 1,491,199 1,400,582 87,307 KW Nuclear Components Co., Ltd. 42,363 460 14,344 5,386 Busan Shinho Solar Power Co., Ltd. 31,863 5,188 9,197 4,473 Global Trade Of Power System Co., Ltd. 2,398 277 2,044 (229 ) Expressway Solar-light Power Generation Co., Ltd. 13,065 2,691 3,397 892 Amman Asia Electric Power Company 719,388 347,015 21,772 33,811 KAPES, Inc. 203,066 165,475 32,294 2,150 Honam Wind Power Co., Ltd. 31,183 14,938 6,570 1,540 Korea Power Engineering Service Co., Ltd. 21,534 1,853 11,248 1,203 Chun-cheon Energy Co., Ltd. 565,972 447,820 502,889 10,435 Yeonggwangbaeksu Wind Power Co., Ltd. 73,854 50,936 13,523 1,944 Nghi Son 2 Power LLC 3,775,717 2,939,740 825,701 33,505 Kelar S.A. 691,104 493,325 112,201 12,488 PT. Tanjung Power Indonesia 704,274 446,700 111,138 21,854 Incheon New Power Co., Ltd. 1,404 377 3,781 485 Seokmun Energy Co., Ltd. 201,776 144,565 54,575 (1,581 ) Daehan Wind Power PSC 144,260 111,407 17,880 4,951 Barakah One Company 35,586,640 36,901,367 1,243,735 (230,503 ) Nawah Energy Company 569,982 568,147 555,338 34 MOMENTUM 13,449 12,821 23,160 624 Daegu Green Power Co., Ltd. 515,354 429,204 380,130 (5,146 ) Yeonggwang Wind Power Co., Ltd. 225,286 175,530 36,326 11,672 Chester Solar IV SpA 12,435 11,504 2,119 395 Chester Solar V SpA 4,124 4,002 696 141 Diego de Almagro Solar SpA 15,785 13,907 3,114 931 South Jamaica Power Company Limited 482,866 267,307 240,664 18,833 Daesan Green Energy Co., Ltd. 237,663 174,261 111,225 11,480 RE Holiday Holdings LLC 340,773 172,589 21,178 664 RE Pioneer Holdings LLC 257,091 148,929 14,136 (2,164 ) RE Barren Ridge 1 Holdings LLC 213,491 97,184 11,915 (1,979 ) RE Astoria 2 LandCo LLC 14,116 242 1,014 823 RE Barren Ridge LandCo LLC 4,980 97 393 329 Laurel SpA 10,665 9,768 1,646 169 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd 30,081 84 —  (182 ) Cheong-Song Noraesan Wind Power Co., Ltd. 54,086 41,352 6,780 1,240 Chester Solar I SpA 12,846 10,712 1,620 214 Solar Philippines Calatagan Corporation 146,304 37,922 16,420 9,121 Saemangeum Solar Power Co., Ltd. 34,905 5,994 —  (162 ) Chungsongmeon BongSan wind power Co., Ltd. 83,147 80,102 —  (925 ) Jaeun Resident Wind Power Plant Co., Ltd. 95,529 87,893 181 (80 ) DE Energia SpA 28,017 21,416 5,006 21,118 Dangjin Eco Power Co., Ltd. 96,980 19,299 3,789 589 Haemodum Solar Co., Ltd. 21,612 15,241 2,216 299 Yangyang Wind Power Co., Ltd. 124,550 103,766 211 (858 ) HORUS SOLAR, S.A. DE C.V. 210,868 160,006 20,586 26,865 2023 Investees Total assets Total liabilities Sales Profit (loss) for the year In millions of won <Joint ventures> RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. ￦ 239,548 180,912 4,920 24,984 SUNMEX RENOVABLES, S.A. DE C.V. 156,696 133,032 —  6,232 Stavro Holding II A.B. 91,342 28 —  (87 ) Solaseado Solar Power Co., Ltd. 346,793 304,142 39,907 4,823 Yeongam Solar Power Co., Ltd. 326,429 279,779 35,280 4,506 Samsu Wind Power Co., Ltd. 67,150 51,247 8,751 1,741 Pulau Indah Power Plant Sdn. Bhd. 800,300 720,459 431 2,095 NH-Amundi 72,465 97 7,569 7,080 Shin-han 17,230 22 38 (3 ) PT Barito Wahana Tenaga 512,846 —  —  72,320 Cheongna Energy Co., Ltd. 428,042 380,935 119,530 29,511 Naepo Green Energy Co., Ltd. 695,684 677,583 312,592 53,343 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) 441,975 498,353 212,997 5,544 OneEnergy Asia Limited 2,181,165 1,520,032 1,149,944 94,298 KAS INVESTMENT I LLC 52,806 —  (7,436 ) (7,437 ) KAS INVESTMENT II LLC 52,555 1 (7,444 ) (7,445 ) Energyco Co., Ltd. 54,336 49,816 6,599 (173 ) CAES, LLC 48,495 5 —  (2,388 ) Hapcheon Floating Photovoltaic Power Plant Inc. 79,924 58,887 12,679 4,266 Busan Industrial Solar Power Co., Ltd. 18,636 15,896 2,378 106 Bitsolar Energy Co., Ltd. 73,435 79,367 8,249 (1,125 ) Pulau Indah O&M Sdn. Bhd. —  —  —  —  Guadalupe Solar SpA 10,646 8,811 1,684 626 Omisan Wind Power Co., Ltd. 150,813 126,853 —  (453 ) Foresight Iberian Solar Group Holding, S.L. 94,972 86,049 —  (2,712 ) Yeongwol Eco Wind Co., Ltd. 109,716 102,143 3,561 2,975 Gurae Resident Power Co., Ltd. 14,096 12,299 652 615 Cheongju Eco Park Co., Ltd. 145,956 115,347 38,907 (4,892 ) Enel X Midland Photovoltaic, LLC 12,825 115 2,128 850 Geumsungsan Wind Power Co., Ltd. 142,703 125,602 13,568 6,570 KEPCO KPS CARABAO Corp. 375 468 —  (467 ) Prime Swedish Holding AB 83,699 218 —  (524 ) Goheung New Energy Co., Ltd. 177,924 146,175 29,246 8,460 Gunsan Land Solar Co., Ltd. 144,435 108,848 23,523 (974 ) CapMan Lynx SCA, SICAR 139,262 132,430 1,427 (12,401 ) International Offshore Power Transmission Holding Company Limited 6,555 2,486 —  (195 ) Pyeongchang Wind Power Co., Ltd. 60,535 39,452 9,361 (2,354 ) Eumseong Eco Park Co., Ltd. 153,927 126,998 46,679 5,609 Changwon Nu-ri 13,183 29 —  (44 ) PungBack Wind Farm Corporation 70,330 51,804 —  (255 ) Trumbull Asset Management, LLC 1,697 497 5,955 887 S-Power 2,240 2,390 1,327 (139 ) Seungmun Green Energy 144,600 115,034 10,879 2,127 Seobusambo highway photovoltaics Co., Ltd. 9,838 5,362 1,051 624 Yangyang Suri Wind Power Co., Ltd. 111,682 78,552 —  (3,069 ) KEPCO for Power Company 235,212 234,487 —  (3,610 ) Taebaek Wind Power Co., Ltd. 26,606 3,385 7,384 3,752 Jeonju Bio Green Energy Co., Ltd. 4,916 —  —  (84 ) Kumyang Eco Park Co., Ltd. 13,831 1,395 —  (71 ) Jeongeup Green Power Co., Ltd. 11,243 5,462 —  (1,343 ) Hadong E-factory 1,544 399 —  (13 ) Namyangju Combined Heat and Power Co., Ltd. 7,000 —  —  —  Wadi Noor Solar Power Company SAOC 70,963 69,288 —  —  Fairhaven Energy Storage LLC —  —  —  —
Summary of Financial Information of Associates and Joint Ventures in Consolidated Financial Statements	(5) Financial information of associates and joint ventures reconciled to the Company's investments in consolidated financial statements as of December 31, 2022 and 2023 are as follows: 2022 Investees Net assets Percentage Share in net assets Investment differential Intercompany transaction Others Book value In millions of won <Associates> Korea Gas Corporation ￦   10,410,740 20.47 %   2,131,078 —  —  (45,782 ) 2,085,296 Korea Electric Power Industrial Development Co., Ltd. 107,166 29.00 % 31,078 —  —  —  31,078 YTN Co., Ltd. 256,791 21.43 % 55,027 —  —  —  55,027 Gangwon Wind Power Co., Ltd. 80,729 15.00 % 12,109         49 —  —  12,158 Hyundai Green Power Co., Ltd. 413,072 29.00 % 119,791 —  —  —  119,791 Korea Power Exchange 275,126 100.00 % 275,126 —  —  —  275,126 Taebaek Wind Power Co., Ltd. 24,168 60.00 % 14,501 —  —  —  14,501 Taebaek Guinemi Wind Power Co., Ltd. 15,327 67.25 % 10,307 —  —  2,742 13,049 Daeryun Power Co., Ltd. 402,140 6.85 % 27,547 —  —  (820 ) 26,727 KNH Solar Co., Ltd. 10,679 27.00 % 2,883 —  —  —  2,883 SPC Power Corporation 228,534 38.00 % 86,843 —  —  (15,975 ) 70,868 Gemeng International Energy Co., Ltd. 2,335,997 34.00 % 794,239 —  —  (215,418 ) 578,821 PT. Cirebon Electric Power 491,324 27.50 % 135,114 —  —  —      135,114 KNOC Nigerian East Oil Co., Ltd. (83,483 ) 14.63 % (12,214 ) —  —       12,214 —  KNOC Nigerian West Oil Co., Ltd. (76,755 ) 14.63 % (11,229 ) —  —  11,229 —  PT Wampu Electric Power 82,051 46.00 % 37,743 —  —  —  37,743 PT. Bayan Resources TBK 2,476,409 20.00 % 495,282 265,817 —  (76,380 ) 684,719 S-Power Co., Ltd. 290,656 49.00 % 142,421 —  (1,293 ) —  141,128 Pioneer Gas Power Limited (205,787 ) 38.50 % (79,223 ) 22,278 —  56,945 —  Eurasia Energy Holdings (508 ) 40.00 % (203 ) —  —  203 —  Xe-Pian Xe-Namnoy Power Co., Ltd. 466,385 25.00 % 116,596 305 (1,028 ) (289 ) 115,584 PT. Mutiara Jawa 12,402 29.00 % 3,597 —  —  —  3,597 Samcheok Eco Materials Co., Ltd. 23,343 25.54 % 5,962 —  —  (5,962 ) —  Noeul Green Energy Co., Ltd. (18,861 ) 29.00 % (5,470 ) —  —  5,470 —  Goseong Green Power Co., Ltd. 1,001,651 29.00 % 290,479 —  (1,586 ) —  288,893 Gangneung Eco Power Co., Ltd. 7,464 1.61 % 120 —  (134 ) 14 —  Shin Pyeongtaek Power Co., Ltd. 363,838 40.00 % 145,535 3,559 (15,271 ) —  133,823 Haeng Bok Do Si Photovoltaic Power Co., Ltd. 986 28.00 % 276 —  —  2 278 Dongducheon Dream Power Co., Ltd. 302,071 34.01 % 102,734 1,757 (2,609 ) (12,582 ) 89,300 Jinbhuvish Power Generation Pvt. Ltd. 47,988 5.16 % 2,496 —  —  (2,496 ) —  Daejung Offshore Wind Power Co., Ltd. 3,337 46.59 % 1,555 —  —  —  1,555 GS Donghae Electric Power Co., Ltd. 765,131 34.00 % 260,145 —  —  —  260,145 Daegu Photovoltaic Co., Ltd. 9,823 29.00 % 2,849 —  —  —  2,849 Busan Green Energy Co., Ltd. 15,156 29.00 % 4,395 —  —  —  4,395 Gunsan Bio Energy Co., Ltd. (21,127 ) 18.87 % (3,986 ) —  —  3,986 —  Hansuwon KNP Co., Ltd. 1,519 28.98 % 440 —  —  (160 ) 280 Korea Electric Power Corporation Fund 29,400 98.09 % 28,838 —  —  4 28,842 Energy Infra Asset Management Co., Ltd. 11,956 9.90 % 1,184 —  —  —  1,184 Daegu clean Energy Co., Ltd. 44 28.00 % 12 —  —  —  12 Yaksu 1,670 29.00 % 484 2 —  —  486 Nepal Water & Energy Development Company Private Limited 99,862 69.06 % 68,968 972 —  —  69,940 Gwangyang Green Energy Co., Ltd. 125,130 20.00 % 25,026 18 —  —  25,044 PND S 4,306 29.00 % 1,249 154 —  —  1,403 Hyundai Eco Energy Co., Ltd. 39,033 19.00 % 7,416 215 —  —  7,631 YeongGwang Yaksu Wind Electric Co., Ltd. 788 9.63 % 76 300 —  (220 ) 156 Green Energy Electricity Generation Co., Ltd. 2,733 29.00 % 793 778 —  —  1,571 Korea Energy Solutions Co., Ltd. 466 20.00 % 93 —  —  —  93 ITR Co., Ltd. (26 ) 20.00 % (5 ) 1 —  4 —  STN Co., Ltd. (formerly, Structure test network Co., Ltd.) 1,565 20.00 % 313 53 —  —  366 Namjeongsusang Solar Power Operation Co., Ltd. 2,355 15.00 % 353 20 —  —  373 Indeck Niles Development, LLC 416,164 50.00 % 208,082 93,956 —  —  302,038 Indeck Niles Asset Management, LLC 283 33.33 % 94 —  —  —  94 2022 Investees Net assets Percentage Share in net assets Investment differential Intercompany transaction Others Book value In millions of won <Associates> Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 ￦ 14,146 49.00 % 6,932 —  —  —  6,932 Suwon New Power Co., Ltd. 1,978 33.05 % 654 —  265 —  919 Gwangbaek Solar Power Investment Co., Ltd. 10,949 44.00 % 4,818 315 —  —  5,133 Go deok Clean Energy Co., Ltd. 11,049 40.00 % 4,420 —  —  —  4,420 SureDataLab Co., Ltd. 739 23.95 % 177 —  —  —   177 SEP Co., Ltd. (65 ) 21.26 % (14 ) —  —  14 —  Hankook Electric Power Information Co., Ltd. 1,337 16.49 % 220 —  —  —  220 Tronix Co., Ltd. 526 12.50 % 66 —  —  —  66 O2&B Global Co., Ltd. 181 20.00 % 36 —  —  —  36 Muan Sunshine Solar Power Plant Co., Ltd. 10,338 20.00 % 2,068 494 —  —  2,562 Bigeum Resident Photovoltaic Power Co., Ltd. (1,539 ) 29.90 % (460 ) 24 —  436 —  Goesan Solar Park Co., Ltd. 8,936 29.00 % 2,591 —  —  —  2,591 Saemangeum Heemang Photovoltaic Co., Ltd. 35,060 35.00 % 12,271 739 —  —  13,010 Bitgoel Eco Energy Co., Ltd. 18,249 49.05 % 8,951 —  —  —  8,951 Jeju Gimnyeong Wind Power Co., Ltd. 2,907 30.00 % 872 —  —  —  872 Seoroseoro Sunny Power Plant Co., Ltd. 1,970 42.58 % 839 20 —  —  859 Muan Solar park Co., Ltd. 37,565 20.00 % 7,513 325 —  —  7,838 YuDang Solar Co., Ltd. 2,929 20.00 % 586 —  —  —  586 Anjwa Smart Farm & Solar City Co., Ltd. 39,225 20.00 % 7,845 817 —  —  8,662 Daewon Green Energy Co., Ltd. 17,514 25.36 % 4,441 44 —  —  4,485 G.GURU Co., Ltd. 1,216 24.65 % 300 —  —  —  300 UD4M Co., Ltd. 1,125 14.29 % 161 —  —  —  161 Dongbu Highway Solar Co., Ltd. 1,509 20.00 % 302 50 —  —  352 Seobu Highway Solar Co., Ltd. 1,581 20.00 % 316 —  —  —  316 Korea Energy Data Co., Ltd. 211 29.37 % 62 —  —  —  62 Gangneung Sacheon Fuel Cell Co., Ltd. 10,218 41.00 % 4,189 88 —  —  4,277 KOSTURE Co., Ltd. 156 0.82 % 1 —  —  —  1 Taebaek Gadeoksan Wind Power Co., Ltd. 58,940 34.00 % 20,040 —  —  —  20,040 Chuncheon Green Energy Co., Ltd. 20,226 45.00 % 9,102 53 —  —  9,155 Yeomsubong Wind Power Co., Ltd. 1,540 3.81 % 59 3 —  —  62 Yeongyang Wind Power Corporation II 17,837 30.00 % 5,351 2,110 —  —  7,461 Haeparang Energy Co., Ltd. 8,673 25.00 % 2,168 20 —  —  2,188 Saemangeum Sebit Power Plant Co., Ltd. 36,439 63.09 % 22,990 209 —  —  23,199 Boulder Solar III, LLC 1,896 30.00 % 569 175 —  —  744 PlatformN. Co., Ltd. 285 29.58 % 84 —  —  —  84 PT. Cirebon Energi Prasarana 690,347 10.00 % 69,035 —  —  —  69,035 Green Radiation Co., Ltd. 77 10.00 % 8 3 —  —  11 Future Convergence Technology Laboratory. Co., Ltd. 249 20.12 % 50 —  —  —  50 SC E&G. Co,. Ltd. 1,068 20.00 % 214 —  —  —  214 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co., Ltd.) 828 20.00 % 166 —  —  —  166 ACE 100 20.00 % 20 —  —  —  20 Environment and Energy Co., Ltd. 93 10.54 % 10 —  —  —  10 Santiago Solar Power SpA 26,748 50.00 % 13,373 —  —  —  13,373 Yanggu Floating Photovoltaic Power Plant Inc. 3,115 29.00 % 903 —  —  —  903 <Joint ventures> KEPCO-Uhde Inc. 33 50.85 % 17 —  —  —  17 Shuweihat Asia Power Investment B.V.   135,617 49.00 % 66,452 —  —  —  66,452 Shuweihat Asia Operation & Maintenance Company 2,966 55.00 % 1,631 —  —  —  1,631 Waterbury Lake Uranium L.P. 66,589 32.59 % 21,701 49 —  —  21,750 ASM-BG Investicii AD 29,110 50.00 % 14,555 —  —  —  14,555 2022 Investees Net assets Percentage Share in net assets Investment differential Intercompany transaction Others Book value In millions of won <Joint ventures> RES Technology AD ￦ 30,266 50.00 %    15,133 —  —  —  15,133 KV Holdings, Inc. 24,148 40.00 % 9,659 —  —  —  9,659 KEPCO SPC Power Corporation 238,822 75.20 % 179,594 —  —  —  179,594 Gansu Datang Yumen Wind Power Co., Ltd. 15,059 40.00 % 6,024 —  —  —  6,024 Datang Chifeng Renewable Power Co., Ltd. 479,954 40.00 % 191,982 —  —  —  191,982 Datang KEPCO Chaoyang Renewable Power Co., Ltd. 110,995 40.00 % 44,398 —  —  —  44,398 Rabigh Electricity Company 665,110 40.00 % 266,044 —  (50,632 ) (805 ) 214,607 Rabigh Operation & Maintenance Company Limited 12,782 40.00 % 5,113 —  —  —  5,113 Jamaica Public Service Company Limited 795,250 40.00 % 318,100 29,357 —  (16,050 ) 331,407 KW Nuclear Components Co., Ltd. 38,368 45.00 % 17,266 —  —  (176 ) 17,090 Busan Shinho Solar Power Co., Ltd. 26,877 25.00 % 6,719 —  —  —   6,719 Global Trade Of Power System Co., Ltd. 2,406 29.00 % 698 —  —  —  698 Expressway Solar-light Power Generation Co., Ltd. 9,508 50.00 % 4,754 —  —  —  4,754 Amman Asia Electric Power Company 367,090 60.00 % 220,254 —  —  —  220,254 KAPES, Inc. 37,875 51.00 % 19,316 —  (22,451 ) 3,135 —  Honam Wind Power Co., Ltd. 16,506 29.00 % 4,787 32 —  —  4,819 Korea Power Engineering Service Co., Ltd. 19,114 29.00 % 5,543 —  —  —  5,543 Chun-cheon Energy Co., Ltd. 107,990 29.90 % 32,289 3 —  (248 ) 32,044 Yeonggwangbaeksu Wind Power Co., Ltd. 20,972 15.00 % 3,146 5 —  —  3,151 Nghi Son 2 Power LLC 817,678 50.00 % 408,839 —  —  —  408,839 Kelar S.A. 175,717 65.00 % 114,216 2,921 —  —  117,137 PT. Tanjung Power Indonesia 265,448 35.00 % 92,907 —  —  —  92,907 Incheon New Power Co., Ltd. 1,878 29.00 % 545 —  —  (347 ) 198 Seokmun Energy Co., Ltd. 59,778 29.00 % 17,336 —  —  —  17,336 Daehan Wind Power PSC 27,846 50.00 % 13,923 —  —  —  13,923 Barakah One Company (835,613 ) 18.00 % (150,410 ) —  56,437 93,973 —  Nawah Energy Company 1,749 18.00 % 315 —  —  —  315 Momentum 1,035 33.33 % 345 —  —  —  345 Daegu Green Power Co., Ltd. 91,550 54.24 %    49,657 84 —  (20,381 ) 29,360 Yeonggwang Wind Power Co., Ltd. 43,958 46.00 % 20,221 492 —  —  20,713 Chester Solar IV SpA 259 45.00 % 117 64 —  —  181 Chester Solar V SpA 49 45.00 % 22 134 —  —  156 Diego de Almagro Solar SpA 962 45.00 % 433 107 —  —  540 South Jamaica Power Company Limited 232,199 20.00 % 46,440 —  —  (3 ) 46,437 Daesan Green Energy Co., Ltd. 54,908 35.00 % 19,218 —  —  —  19,218 RE Holiday Holdings LLC 170,740 50.00 % 85,370 —  —  —  85,370 RE Pioneer Holdings LLC 110,344 50.00 % 55,172 —  —  —  55,172 RE Barren Ridge 1 Holdings LLC 126,068 50.00 % 63,034 —  —  (59,684 ) 3,350 RE Astoria 2 LandCo LLC 13,198 50.00 % 6,599 —  —  —  6,599 RE Barren Ridge LandCo LLC 4,666 50.00 % 2,333 —  —  —  2,333 Laurel SpA 774 45.00 % 348 206 —  —  554 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd 29,443 12.37 % 3,642 9 —  —  3,651 Chile Solar JV SpA 19,637 50.00 % 9,819 —  —  —  9,819 Cheong-Song Noraesan Wind Power Co., Ltd. 14,484 29.01 % 4,202 61 —  —  4,263 Chester Solar I SpA 2,313 45.00 % 1,041 273 —  —  1,314 Solar Philippines Calatagan Corporation 76,571 38.00 % 29,097 —  —  27,805 56,902 Saemangeum Solar Power Co., Ltd. 29,073 81.01 % 23,551 —  —  —  23,551 Chungsongmeon BongSan wind power Co., Ltd. 5,823 29.00 % 1,689 1,781 —  —  3,470 Jaeun Resident Wind Power Plant Co., Ltd. 7,709 29.00 % 2,236 —  —  —  2,236 2022 Investees Net assets Percentage Share in net assets Investment differential Intercompany transaction Others Book value In millions of won <Joint ventures> DE Energia SpA ￦ (14,131 ) 49.00 % (6,924 ) —  —  16,460 9,536 Dangjin Eco Power Co., Ltd. 77,993 34.00 % 26,518 341 —  —  26,859 Haemodum Solar Co., Ltd. 6,871 49.00 % 3,367 —  —  —  3,367 Yangyang Wind Power Co., Ltd. 21,642 50.00 % 10,821 43 —  —  10,864 HORUS SOLAR, S.A. DE C.V. 22,722 14.95 % 3,396 3,580 —  —  6,976 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. 18,253 14.95 % 2,728 2,171 —  —  4,899 SUNMEX RENOVABLES, S.A. DE C.V. 11,053 14.95 % 1,652 5 —  —  1,657 Stavro Holding II A.B. 85,856 20.00 % 17,171 —  —  —  17,171 Solaseado Solar Power Co., Ltd. 38,230 38.90 % 14,872 1,361 —  —  16,233 Yeongam Solar Power Co., Ltd. 47,923 19.00 % 9,105 774 —  —  9,879 Samsu Wind Power Co., Ltd. 16,869 19.00 % 3,205 —  —  —  3,205 Pulau Indah Power Plant Sdn. Bhd. 84,683 25.00 % 21,171 5,643 —  —  26,814 NH-Amundi Global Infrastructure Investment Private Investment Trust 21 71,777 29.53 % 21,196 527 —  —  21,723 Shin-han BNPP Private Investment Trust for East-West Sunlight Dream 17,319 90.00 % 15,587 —  —  —  15,587 PT Barito Wahana Tenaga 447,688 30.61 % 137,047 —  —  —  137,047 Cheongna Energy Co., Ltd. 17,595 50.10 % 8,815 3,137 (1,194 ) —  10,758 Naepo Green Energy Co., Ltd. (51,219 ) 29.20 % (14,956 ) —  —  14,956 —  Dayone Energy Co., Ltd. (59,627 ) 46.30 % (27,607 ) —  (868 ) 28,475 —  OneEnergy Asia Limited 366,764 40.00 % 146,706 25,512 —  —  172,218 KAS Investment I LLC 61,046 29.89 % 18,247 —  —  —  18,247 KAS Investment II LLC 60,800 29.89 % 18,173 —  —  —  18,173 Energyco Co., Ltd. 4,692 29.00 % 1,361 829 —  —  2,190 CAES, LLC 49,670 36.00 % 17,881 2,924 —  —  20,805 Hapcheon Floating Photovoltaic Power Plant Inc. 17,207 49.00 % 8,432 39 —  —  8,471 Busan Industrial Solar Power Co., Ltd. 3,133 28.02 % 878 290 —  —  1,168 Bitsolar Energy Co., Ltd. (4,545 ) 27.10 % (1,232 ) 352 —  1,232 352 Pulau Indah O&M Sdn. Bhd. —  60.00 % —  —  —  —  —  Guadalupe Solar SpA 1,358 60.00 % 815 98 —  —  913 Omisan Wind Power Co., Ltd. 24,393 42.00 % 10,245 166 —  —  10,411 Foresight Iberian Solar Group Holding, S.L. 12,184 75.00 % 9,138 1,427 —  —  10,565 Yeongwol Eco Wind Co., Ltd. 4,575 29.00 % 1,327 1,828 —  —  3,155 Gurae Resident Power Co., Ltd. 1,182 29.00 % 343 48 —  —  391 Cheongju Eco Park Co., Ltd. 35,500 29.00 % 10,295 195 —  —  10,490 Enel X Midland Photovoltaic, LLC 9,279 20.00 % 1,856 —  —  —  1,856 Geumsungsan Wind Power Co., Ltd. 10,128 29.00 % 2,937 556 —  —  3,493 KEPCO KPS CARABAO Corp. 443 40.00 % 177 —  —  —  177 Prime Swedish Holding AB 77,828 45.00 % 35,023 1,222 —  —  36,245 Goheung New Energy Co., Ltd. 23,289 46.15 % 10,748 1,084 —  —  11,832 Gunsan Land Solar Co., Ltd. 36,586 75.29 % 27,544 —  —  —  27,544 CapMan Lynx SCA, SICAR 9,908 50.00 % 4,954 —  —  (4,954 ) —  International Offshore Power Transmission Holding Company Limited (66,788 ) 35.00 % (23,376 ) (2 ) —  23,378 —  Pyeongchang Wind Power Co., Ltd. 24,938 58.00 % 14,464 —  —  —  14,464 Eumseong Eco Park Co., Ltd. 17,173 29.00 % 4,980 577 —  —  5,557 Songsan Green Energy Co., Ltd. 5,500 25.00 % 1,375 12 —  —  1,387 Changwon Nu-ri Energy Co., Ltd. 1,490 33.33 % 497 —  —  —  497 Hasami Wind Farm Corporation 3,100 29.00 % 899 690 —  —  1,589 PungBack Wind Farm Corporation 15,290 37.00 % 5,657 1,086 —  —  6,743 Trumbull Asset Management, LLC 316 78.00 % 246 —  —  —  246 S-Power Chile SpA (20 ) 50.00 % (10 ) —  —  137 127 Seungmun Green Energy 27,440 33.00 % 9,054 —  —  —  9,054 Seobusambo highway photovoltaics Co., Ltd. 3,833 80.00 % 3,066 —  —  —  3,066 (*) The percentage of ownership shown above is after considering the treasury stocks and others. 2023 Investees Net assets Percentage Share in net Investment differential Intercompany transaction Others Book value In millions of won <Associates> Korea Gas Corporation ￦   9,826,038 20.47 %   2,011,390 —          —  (40,747 ) 1,970,643 Korea Electric Power Industrial Development Co., Ltd. 101,723 29.00 % 29,500 —  —  —  29,500 YTN Co., Ltd. 244,080 21.43 % 52,303 —  —  —  52,303 Gangwon Wind Power Co., Ltd. 79,682 15.00 % 11,952 49 —  —  12,001 Hyundai Green Power Co., Ltd. 407,491 29.00 % 118,173 —  —  —  118,173 Korea Power Exchange 274,286 100.00 % 274,286 —  —  —  274,286 Taebaek Guinemi Wind Power Co., Ltd. 16,043 67.25 % 10,788 2,742 —  —  13,530 Daeryun Power Co., Ltd. 403,701 6.85 % 27,654 —  —  (820 ) 26,834 KNH Solar Co., Ltd. 11,828 27.00 % 3,194 —  —  —  3,194 SPC Power Corporation 258,764 38.00 % 98,330 —  —  (19,399 ) 78,931 Gemeng International Energy Co., Ltd. 2,317,545 42.00 % 973,369 —  —  (267,557 ) 705,812 PT. Cirebon Electric Power 488,215 27.50 % 134,259 —  —  —  134,259 KNOC Nigerian East Oil Co., Ltd. (84,988 ) 14.63 % (12,434 ) —  —  12,434 —  KNOC Nigerian West Oil Co., Ltd. (78,143 ) 14.63 % (11,432 ) —  —  11,432 —  PT Wampu Electric Power 75,120 46.00 % 34,555 —  —  —  34,555 PT. Bayan Resources TBK 2,428,465 20.00 % 485,693 209,894 —  (76,380 ) 619,207 S-Power 334,591 49.00 % 163,950 —  (1,185 ) —  162,765 Pioneer Gas Power Limited (257,311 ) 38.50 % (99,058 ) 22,278 —  76,780 —  Xe-Pian Xe-Namnoy 469,397 25.00 % 117,349 305 (987 ) (289 ) 116,378 PT. Mutiara Jawa 17,822 29.00 % 5,168 —  —  —  5,168 Samcheok Eco Materials Co., Ltd. (17,351 ) 25.54 % (4,431 ) —  —  4,431 —  Noeul Green Energy Co., Ltd. (17,973 ) 29.00 % (5,212 ) —  —  5,212 —  Goseong Green Power Co., Ltd. 1,001,702 29.00 % 290,494 —  (2,870 ) —  287,624 Gangneung Eco Power Co., Ltd. 716,901 29.00 % 207,901 48,531 (1,503 ) —  254,929 Shin Pyeongtaek Power Co., Ltd. 390,335 40.00 % 156,134 3,559 (14,667 ) —  145,026 Haeng Bok Do Si Photovoltaic Power Co., Ltd. 1,045 28.00 % 293 —  —  1 294 Dongducheon Dream Power Co., Ltd. 294,848 34.01 % 100,278 1,757 (2,249 ) (12,583 ) 87,203 Jinbhuvish Power Generation Pvt. Ltd. 48,583 5.16 % 2,526 —  —  (2,526 ) —  Daejung Offshore Wind Power Co., Ltd. 3,183 46.59 % 1,483 —  —  —  1,483 GS Donghae Electric Power Co., Ltd. 762,013 34.00 % 259,085 —  —  —  259,085 Daegu Photovoltaic Co., Ltd. 9,669 29.00 % 2,804 —  —  —  2,804 Busan Green Energy Co., Ltd. 11,239 29.00 % 3,259 —  —  —  3,259 Hansuwon KNP Co., Ltd. 2,164 28.98 % 627 —  —  (160 ) 467 Korea Electric Power Corporation Fund 23,873 98.09 % 23,417 —  —  4 23,421 Energy Infra Asset Management Co., Ltd. 12,257 9.90 % 1,213 —  —  —  1,213 Daegu clean Energy Co., Ltd. 44 28.00 % 12 —  —  (12 ) —  Yaksu 980 29.00 % 284 1 —  —  285 Nepal Water & Energy Development Company Private Limited 159,265 68.88 % 109,701 872 —  —  110,573 Gwangyang Green Energy Co., Ltd. 123,103 20.00 % 24,620 18 —  —  24,638 PND S 4,677 29.00 % 1,356 154 —  —  1,510 Hyundai Eco Energy Co., Ltd. 40,699 19.00 % 7,733 214 —  —  7,947 YeongGwang Yaksu Wind Electric Co., Ltd. 547 9.63 % 53 300 —  (220 ) 133 Green Energy Electricity Generation Co., Ltd. (2,658 ) 29.00 % (771 ) 779 —  —  8 Korea Energy Solutions Co., Ltd. 848 20.00 % 170 —  —  —  170 ITR Co., Ltd. (10 ) 10.00 % (1 ) —  —  1 —  STN Co., Ltd. (formerly, Structure test network Co., Ltd.) 1,691 20.00 % 338 53 —  —  391 Indeck Niles Development, LLC 482,200 50.00 % 241,100 90,074 —  4,227 335,401 Indeck Niles Asset Management, LLC 278 33.33 % 93 —  —  —  93 Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 13,258 49.00 % 6,496 —  —  —  6,496 2023 Investees Net assets Percentage Share in net Investment differential Intercompany transaction Others Book value In millions of won <Associates> Suwon New Power Co., Ltd. ￦ 2,318 33.05 % 766 —  256 —  1,022 Gwangbaek Solar Power Investment Co., Ltd. 10,998 44.00 % 4,839 316 —  —  5,155 Go deok Clean Energy Co., Ltd. 11,807 40.00 % 4,723 —  —  —  4,723 SureDataLab Co., Ltd. 474 23.95 % 114 —  —  —  114 SEP Co., Ltd. (72 ) 21.26 % (15 ) —  —  15 —  Hankook Electric Power Information Co., Ltd. 1,296 16.49 % 214 —  —  —  214 Tronix Co., Ltd. 1,757 12.50 % 220 —  —  —  220 O2&B Global Co., Ltd. 105 20.00 % 21 —  —  —  21 Muan Sunshine Solar Power Plant Co., Ltd. 11,637 20.00 % 2,328 494 —  —  2,822 Bigeum Resident Photovoltaic Power Co., Ltd. (5,723 ) 29.90 % (1,711 ) 24 —  1,687 —  Goesan Solar Park Co., Ltd. 9,921 29.00 % 2,877 —  —  —  2,877 Saemangeum Heemang Photovoltaic Co., Ltd. 39,089 35.00 % 13,681 739 —  —  14,420 Bitgoel Eco Energy Co., Ltd. 25,269 49.05 % 12,394 —  —  —  12,394 Jeju Gimnyeong Wind Power Co., Ltd. 819 30.00 % 246 —  —  —  246 Seoroseoro Sunny Power Plant Co., Ltd. 2,163 42.58 % 921 20 —  —  941 Muan Solar park Co., Ltd. 32,526 20.00 % 6,505 325 —  —  6,830 YuDang Solar Co., Ltd. 2,849 20.00 % 570 —  —  —  570 Anjwa Smart Farm & Solar City Co., Ltd. 34,245 20.00 % 6,849 816 —  —  7,665 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) 30,506 25.36 % 7,735 44 —  —  7,779 G.GURU Co., Ltd. 676 24.65 % 167 —  —  —  167 UD4M Co., Ltd. 1,048 14.29 % 150 —  —  —  150 Dongbu Highway Solar Co., Ltd. 1,650 20.00 % 330 50 —  —  380 Seobu Highway Solar Co., Ltd. 2,032 20.00 % 406 —  —  —  406 Korea Energy Data Co., Ltd. 122 29.37 % 36 —  —  —  36 Gangneung Sacheon Fuel Cell Co., Ltd. 18,982 41.00 % 7,783 87 —  —  7,870 KOSTURE Co., Ltd. 174 4.42 % 8 —  —  —  8 Taebaek Gadeoksan Wind Power Co., Ltd. 57,135 34.00 % 19,426 —  —  —  19,426 Chuncheon Green Energy Co., Ltd. 19,659 45.00 % 8,847 53 —  —  8,900 Yeomsubong Wind Power Co., Ltd. 2,156 29.00 % 625 246 —  —  871 Yeongyang Wind Power Corporation II 26,634 30.00 % 7,990 2,110 —  —  10,100 Haeparang Energy Co., Ltd. 8,339 25.00 % 2,084 20 —  —  2,104 Saemangeum Sebit Power Plant Co., Ltd. 67,286 55.00 % 37,009 182 —  —  37,191 Boulder Solar III, LLC 1,929 30.00 % 579 175 —  —  754 PlatformN. Co., Ltd. (210 ) 29.58 % (62 ) —  —  62 —  PT. Cirebon Energi Prasarana 765,973 10.00 % 76,597 —  —  —  76,597 Green Radiation Co., Ltd. 226 10.00 % 23 3 —  —  26 Future Convergence Technology Laboratory. Co., Ltd. 177 20.12 % 36 —  —  —  36 Eco motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.) 1,335 20.00 % 267 —  —  —  267 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) 720 16.67 % 120 —  —  —  120 ACE 37 20.00 % 7 —  (5 ) —  2 Environment and Energy Co., Ltd. 89 10.54 % 9 —  —  —  9 Santiago Solar Power SpA 23,538 50.00 % 11,769 —  —  —  11,769 Yanggu Floating Photovoltaic Power Plant Inc. 2,622 29.00 % 760 —  —  —  760 Power Embedded 296 23.33 % 69 1 —  —  70 Changwon SG Energy Co., Ltd. 4,089 18.78 % 768 15 —  —  783 Donpyung Technology. Co., Ltd. 1,396 20.00 % 279 —  (25 ) —  254 HORANG ENERGY Inc. 9,813 40.00 % 3,925 224 —  —  4,149 2023 Investees Net assets Percentage Share in net Investment differential Intercompany transaction Others Book value In millions of won <Associates> Hoenggye Renewable Energy Co., Ltd ￦ (1,028 ) 36.10 % (370 ) 2,270 —  475 2,375 Haman Green Energy Co., Ltd. 8,516 35.00 % 2,981 —  —  —  2,981 Songsan Green Energy Co., Ltd. 13,754 60.00 % 8,252 71 —  —  8,323 <Joint ventures> Shuweihat Asia Power Investment B.V. 142,660 49.00 % 69,902 —  —  —  69,902 Shuweihat Asia Operation & Maintenance Company 3,305 55.00 % 1,818 —  —  —  1,818 Waterbury Lake Uranium L.P. 73,770 30.65 % 22,612 —  —  —  22,612 ASM-BG 29,478 50.00 % 14,739 —  —  —  14,739 RES Technology AD 28,765 50.00 % 14,383 —  —  —  14,383 KV Holdings, Inc. 12,966 40.00 % 5,186 —  —  —  5,186 KEPCO SPC Power Corporation 261,362 75.20 % 196,544 —  —  —  196,544 Gansu Datang Yumen Wind Power Co., Ltd. 15,788 40.00 % 6,315 —  —  —  6,315 Datang Chifeng Renewable Power Co., Ltd. 466,847 40.00 % 186,739 —  —  —  186,739 Datang KEPCO Chaoyang Renewable Power Co., Ltd. 108,017 40.00 % 43,207 —  —  —  43,207 Rabigh Electricity Company 701,614 40.00 % 280,646 —  (45,692 ) 97 235,051 Rabigh Operation & Maintenance Company Limited 12,411 40.00 % 4,964 —  —  —  4,964 Jamaica Public Service Company Limited 840,820 40.00 % 336,328 29,357 —  (15,819 ) 349,866 KW Nuclear Components Co., Ltd. 41,903 45.00 % 18,856 —  —  (176 ) 18,680 Busan Shinho Solar Power Co., Ltd. 26,675 25.00 % 6,669 —  —  —  6,669 Global Trade Of Power System Co., Ltd. 2,121 29.00 % 615 —  —  —  615 Expressway Solar-light Power Generation Co., Ltd. 10,374 50.00 % 5,187 —  —  —  5,187 Amman Asia Electric Power Company 372,373 60.00 % 223,424 —  —  —  223,424 KAPES, Inc. 37,591 51.00 % 19,171 —  (22,186 ) 3,015 —  Honam Wind Power Co., Ltd. 16,245 29.00 % 4,711 32 —  —  4,743 Korea Power Engineering Service Co., Ltd. 19,681 29.00 % 5,708 —  —  —  5,708 Chun-cheon Energy Co., Ltd. 118,152 29.90 % 35,327 3 —  (247 ) 35,083 Yeonggwangbaeksu Wind Power Co., Ltd. 22,918 15.00 % 3,437 6 —  —  3,443 Nghi Son 2 Power LLC 835,977 50.00 % 417,989 —  —  —  417,989 Kelar S.A. 197,779 65.00 % 128,557 2,972 —  —  131,529 PT. Tanjung Power Indonesia 257,574 35.00 % 90,151 —  —  —  90,151 Incheon New Power Co., Ltd. 1,027 29.00 % 298 —  —  —  298 Seokmun Energy Co., Ltd. 57,211 29.00 % 16,591 —  —  —  16,591 Daehan Wind Power PSC 32,853 50.00 % 16,426 —  —  —  16,426 Barakah One Company (1,314,727 ) 18.00 % (236,651 ) —  95,932 140,719 —  Nawah Energy Company 1,835 18.00 % 330 —  —  —  330 MOMENTUM 628 33.33 % 209 —  —  —  209 Daegu Green Power Co., Ltd. 86,150 54.24 % 46,728 84 —  (20,382 ) 26,430 Yeonggwang Wind Power Co., Ltd. 49,756 46.00 % 22,888 492 —  —  23,380 Chester Solar IV SpA 931 45.00 % 419 65 —  —  484 Chester Solar V SpA 122 45.00 % 55 136 —  —  191 Diego de Almagro Solar SpA 1,878 45.00 % 846 108 —  —  954 South Jamaica Power Company Limited 215,559 20.00 % 43,112 —  —  (3 ) 43,109 Daesan Green Energy Co., Ltd. 63,402 35.00 % 22,191 —  —  —  22,191 RE Holiday Holdings LLC 168,184 50.00 % 84,092 —  —  —  84,092 RE Pioneer Holdings LLC 108,162 50.00 % 54,081 —  —  —  54,081 RE Barren Ridge 1 Holdings LLC 116,307 50.00 % 58,154 —  —  —  58,154 RE Astoria 2 LandCo LLC 13,874 50.00 % 6,937 —  —  —  6,937 RE Barren Ridge LandCo LLC 4,883 50.00 % 2,441 —  —  —  2,441 Laurel SpA 897 45.00 % 403 210 —  —  613 KIAMCO KOWEPO Bannerton Hold Co Pty Ltd 29,997 12.37 % 3,710 9 —  —  3,719 Cheong-Song Noraesan Wind Power Co., Ltd. 12,734 29.01 % 3,695 61 —  —  3,756 2023 Investees Net assets Percentage Share in net Investment differential Intercompany transaction Others Book value In millions of won <Joint ventures> Chester Solar I SpA ￦ 2,134 45.00 % 960 278 —  —  1,238 Solar Philippines Calatagan Corporation 108,382 38.00 % 41,185 —  —  16,945 58,130 Saemangeum Solar Power Co., Ltd. 28,911 81.01 % 23,419 —  —  —  23,419 Chungsongmeon BongSan wind power Co., Ltd. 3,045 29.00 % 883 1,782 —  —  2,665 Jaeun Resident Wind Power Plant Co., Ltd. 7,636 29.00 % 2,214 —  —  —  2,214 DE Energia SpA 6,601 49.00 % 3,235 —  —  6,468 9,703 Dangjin Eco Power Co., Ltd. 77,681 34.00 % 26,412 341 —  —  26,753 Haemodum Solar Co., Ltd. 6,371 49.00 % 3,122 —  —  —  3,122 Yangyang Wind Power Co., Ltd. 20,784 50.00 % 10,392 43 —  —  10,435 HORUS SOLAR, S.A. DE C.V. 50,862 14.95 % 7,601 3,580 —  —  11,181 RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. 58,636 14.95 % 8,764 2,171 —  —  10,935 SUNMEX RENOVABLES, S.A. DE C.V. 23,664 14.95 % 3,536 5 —  —  3,541 Stavro Holding II A.B. 91,314 20.00 % 18,263 —  —  —  18,263 Solaseado Solar Power Co., Ltd. 42,651 38.90 % 16,592 1,361 —  —  17,953 Yeongam Solar Power Co., Ltd. 46,650 19.00 % 8,864 773 —  —  9,637 Samsu Wind Power Co., Ltd. 15,903 19.00 % 3,022 —  —  —  3,022 Pulau Indah Power Plant Sdn. Bhd. 79,841 25.00 % 19,960 5,643 —  —  25,603 NH-Amundi 72,368 29.53 % 21,370 527 —  —  21,897 Shin-han 17,208 90.00 % 15,487 —  —  —  15,487 PT Barito Wahana Tenaga 512,846 30.61 % 156,994 —  —  —  156,994 Cheongna Energy Co., Ltd. 47,107 50.10 % 23,601 3,137 (1,189 ) —  25,549 Naepo Green Energy Co., Ltd. 18,101 29.20 % 5,285 —  —  —  5,285 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) (56,378 ) 46.30 % (26,103 ) —  (826 ) 26,929 —  OneEnergy Asia Limited 661,133 40.00 % 264,454 25,512 —  —  289,966 KAS INVESTMENT I LLC 52,806 29.89 % 15,784 —  —  —  15,784 KAS INVESTMENT II LLC 52,554 29.89 % 15,709 —  —  —  15,709 Energyco Co., Ltd. 4,520 29.00 % 1,311 829 —  —  2,140 CAES, LLC 48,490 36.00 % 17,457 2,923 —  —  20,380 Hapcheon Floating Photovoltaic Power Plant Inc. 21,037 49.00 % 10,309 39 —  —  10,348 Busan Industrial Solar Power Co., Ltd. 2,740 28.02 % 768 290 —  —  1,058 Bitsolar Energy Co., Ltd. (5,932 ) 27.10 % (1,607 ) 352 —  1,607 352 Pulau Indah O&M Sdn. Bhd. —  60.00 % —  —  —  —  —  Guadalupe Solar SpA 1,835 60.00 % 1,102 98 —  —  1,200 Omisan Wind Power Co., Ltd. 23,960 42.00 % 10,063 166 —  —  10,229 Foresight Iberian Solar Group Holding, S.L. 8,923 75.00 % 6,692 1,427 —  —  8,119 Yeongwol Eco Wind Co., Ltd. 7,573 29.00 % 2,196 1,828 —  —  4,024 Gurae Resident Power Co., Ltd. 1,797 29.00 % 521 48 —  —  569 Cheongju Eco Park Co., Ltd. 30,609 29.00 % 8,877 195 —  —  9,072 Enel X Midland Photovoltaic, LLC 12,710 20.00 % 2,542 —  —  —  2,542 Geumsungsan Wind Power Co., Ltd. 17,101 29.00 % 4,959 556 —  —  5,515 KEPCO KPS CARABAO Corp. (93 ) 40.00 % (37 ) —  —  37 —  Prime Swedish Holding AB 83,481 45.00 % 37,566 1,223 —  —  38,789 Goheung New Energy Co., Ltd. 31,749 46.15 % 14,652 1,084 —  —  15,736 Gunsan Land Solar Co., Ltd. 35,587 56.91 % 20,251 —  —  2,178 22,429 CapMan Lynx SCA, SICAR 6,832 50.00 % 3,416 —  —  (3,416 ) —  International Offshore Power Transmission Holding Company Limited 4,069 35.00 % 1,425 (2 ) —  —  1,423 Pyeongchang Wind Power Co., Ltd. 21,083 58.00 % 12,228 —  —  —  12,228 2023 Investees Net assets Percentage Share in net Investment differential Intercompany transaction Others Book value In millions of won <Associates> Eumseong Eco Park Co., Ltd. ￦ 26,929 29.00 % 7,809 577 —  —  8,386 Changwon Nu-ri 13,154 61.00 % 8,024 3 —  —  8,027 PungBack Wind Farm Corporation 18,526 37.00 % 6,855 1,085 —  —  7,940 Trumbull Asset Management, LLC 1,200 78.00 % 936 —  —  —  936 S-Power (150 ) 50.00 % (75 ) 139 —  —  64 Seungmun Green Energy 29,566 33.00 % 9,757 —  —  —  9,757 Seobusambo highway photovoltaics Co., Ltd. 4,476 80.00 % 3,580 —  —  —  3,580 <Joint ventures> Yangyang Suri Wind Power Co., Ltd. 33,130 29.00 % 9,608 —  —  —  9,608 KEPCO for Power Company 725 60.00 % 435 —  —  —  435 Taebaek Wind Power Co., Ltd. 23,221 60.00 % 13,932 —  —  —  13,932 Jeonju Bio Green Energy Co., Ltd. 4,916 65.00 % 3,195 —  —  —  3,195 Kumyang Eco Park Co., Ltd. 12,436 29.00 % 3,607 56 —  —  3,663 Jeongeup Green Power Co., Ltd. 5,781 18.71 % 1,082 478 —  —  1,560 Hadong E-factory 1,145 29.99 % 343 6 —  —  349 Namyangju Combined Heat and Power Co., Ltd. 7,000 55.00 % 3,850 —  —  —  3,850 Wadi Noor Solar Power Company SAOC 1,675 50.00 % 837 9 —  —  846 Fairhaven Energy Storage LLC —  35.00 % —  —  —  —  —  (*) The percentage of ownership shown above is after considering the treasury stocks and others.
Summary of Unrecognized Equity Interest in Investments in Associates and Joint Ventures	(6) As of December 31, 2022 and 2023, unrecognized equity interest in investments in associates and joint ventures whose book value has been reduced to zero due to accumulated losses are as follows: 2022 2023 Unrecognized Accumulated unrecognized Unrecognized Accumulated unrecognized In millions of won Eurasia Energy Holdings ￦ 13 203 (203 ) —  Gunsan Bio Energy Co., Ltd. (*1) 122 3,986 —  —  Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)   3,565  27,017 937 27,954 Nghi Son 2 Power LLC (18,940 ) —  —  —  Samcheok Eco Materials Co., Ltd. 344 806 3,625 4,431 Naepo Green Energy Co., Ltd. 7,209 14,956 (14,956 ) —  Barakah One Company 51,137 93,973 46,746 140,719 Pioneer Gas Power Limited 19,248 56,877 19,835 76,712 Incheon New Power Co., Ltd. (163 ) —  —  —  Bigeum Resident Photovoltaic Power Co., Ltd. 162 460 (460 ) —  KAPES, Inc. (355 ) 3,160 (145 ) 3,015 Chester Solar IV SpA (21 ) —  —  —  ITR Co., Ltd. 5 5 (4 ) 1 SEP Co., Ltd. 14 14 1 15 International Offshore Power Transmission Holding Company Limited 23,378 23,378 (23,378 ) —  Noeul Green Energy Co., Ltd. 5,470 5,470 (258 ) 5,212 Gangneung Eco Power Co., Ltd. 14 14 (14 ) —  PlatformN. Co., Ltd. —  —  62 62 KEPCO KPS CARABAO Corp. —  —  37 37 (*1) During the year ended December 31, 2023, the entity was reclassified from an associate to financial assets measured at fair value through other comprehensive income.
Summary of Shareholders' Agreements on Investments in Associates and Joint Ventures	(7) As of December 31, 2023, shareholders’ agreements on investments in associates and joint ventures that may cause future economic resource or cash outflows are as follows: (i) Gemeng International Energy Co., Ltd. Gemeng International Energy Co., Ltd. issued put options on 8% of its shares to its financial investors, KEPCO Woori Sprott PEF (NPS Co-Pa PEF). If the investment fund is not collected until the maturity date (December 25, 2023, two years extension is possible), PEF can exercise the option at strike price which is the same as a principal investment price (including operating fees ratio of below 1% per annum), and also, the Company provided a performance guarantee on this agreement. (ii) Taebaek Wind Power Co., Ltd. In the case where non-controlling shareholders decide to dispose of their shares in Taebaek Wind Power Co., Ltd. after the warrant period in the EPC contract of defect repair for wind power generator has expired, the Company acquires those shares at fair value. The acquisition is to be made after the conditions of the acquisition are discussed among the parties involved, with consideration of various factors such as financial status and business situation. (iii) Pyeongchang Wind Power Co., Ltd. In the case where non-controlling shareholders decide to dispose of their shares in Pyeongchang Wind Power Co., Ltd. after commercial operation of the power plant has started, the Company acquires those shares at fair value. The acquisition is to be made after the conditions of the acquisition are discussed among the parties involved, with the careful consideration of various factors such as financial status and business situation. (iv) Daeryun Power Co., Ltd. The Company reserves the right to participate in the transfer of shares in Daeryun Power Co., Ltd. on the same terms as Daeryun E&S Co., Ltd., if Daeryun E&S Co., Ltd. wishes to transfer its shares in Daeryun Power Co., Ltd. (v) Daegu Green Power Co., Ltd. The Company has a right to purchase all the shares of Daegu Green Power Co., Ltd. held by the financial investors at the yield-based transfer amount agreed with the shareholders. The Company can exercise its right 5, 10 and 13 years after the date of the investment. Also, the Company has a right to purchase all or part of the shares of Daegu Green Power Co., Ltd. held by Lotte Engineering & Construction Co. at the yield-based transfer amount agreed with the shareholders. (vi) Yeonggwang Wind Power Co., Ltd. In case the Company intends to purchase all or part of the shares from Daehan Green Energy Co., Ltd., which is a non-controlling shareholder, Daehan Green Energy Co., Ltd. has an obligation to evaluate the shares at fair value and transfer them to the Company. (vii) Hyundai Green Power Co., Ltd. The Company has an obligation to purchase certain shares in Hyundai Green Power Co., Ltd. from financial investors holding certain shares in Hyundai Green Power Co., Ltd. (i.e., IBK and others) when any of the financial investors claim to sell the Company’s shares at a certain point of time in the future. The Company also has the right to claim Hyundai Steel Company, another operating investor of Hyundai Green Power Co., Ltd., to sell its shares at a certain point of time in the future, and is obliged to sell the Company’s shares to Hyundai Steel Company or a third party designated by Hyundai Steel Company when Hyundai Steel Company requests the Company to sell its shares. (viii) Kosture Co., Ltd. The Company acquires the shares with the settled amount of coal provided to Kosture Co., Ltd. every year until completion of the subscription set forth in the shareholders' agreement. (ix) Omisan Wind Power Co., Ltd. The Company has the right to claim Unison Co., Ltd. to transfer its shares in Omisan Wind Power Co., Ltd. either as a whole or as a part after the completion of the power generation complex, and if the Company exercises its right to claim transfer, Unison Co., Ltd. is obliged to transfer such shares at fair value to the Company or a third party designated by the Company. (x) Geumsungsan Wind Power Co., Ltd. The Company has a right to purchase shares owned by Daemyung Energy Co., Ltd., within the range of 18%, for 3 years after the commencement of the operation. (xi) Seungmun Green Energy According to the special conditions of the REC trading contract, a connected entity may demand the sale of ownership stakes held by other investors to the connected entity, or the investors may acquire new stakes or modify business documents through a capital increase in Seungmun Green Energy with prior written consent from the trustee. In the event that other investors sell their stakes to the connected entity, they may demand that the connected entity purchase their stakes in the future if certain conditions are met. (xii) Taebaek Guinemi Wind Power Co., Ltd. If shareholders of Taebaek Guinemi Wind Power Co., Ltd. other than the Company intend to sell their shares after the elapse of warranty period for wind power generators specified in the EPC contract, the Company has preferential right to other parties and third parties to take over the shares that the shareholders want to sell at fair value by reaching agreement with the shareholders on the timing of sales and volume of shares to be sold considering the financial conditions, management conditions and others. (xiii) HORANG ENERGY Inc. The Company has the right to purchase all or partial shares of HORANG ENERGY Inc. held by other shareholders after three years have elapsed from the date of commencing the operations under the unanimous agreement of all shareholders. The Company also has an obligation to sell its shares in HORANG ENERGY Inc. either as a whole or as a part to CNcore Co., Ltd. after three years have elapsed from the date of commencing the operations upon the claim of CNcore Co., Ltd., under the unanimous agreement of all shareholders. (xiv) Namyangju Combined Heat and Power Co., Ltd. The Company has an obligation to purchase certain shares from Narae Energy Co., Ltd. at fair value when Narae Energy Co., Ltd. intends to sell its shares in Namyangju Combined Heat and Power Co., Ltd. on the exercise date agreed upon in accordance with the shareholders’ agreement. If Narae Energy Co., Ltd. becomes the largest equity holder by selling, assigning, or transferring shares in accordance with the shareholders’ agreement, the Company is obligated to guarantee the drag-along right that allows Narae Energy Co., Ltd. to sell the shares held by both shareholders under the same conditions. (xv) Wadi Noor Solar Power Company SAOC The Company has an obligation to purchase certain shares to Nama Holding SAOC at the price agreed upon between shareholders when Nama Holding SAOC intends to purchase shares on the exercise date agreed upon according to the shareholders’ agreement. (xvi) Jeongeup Green Power Co., Ltd. The Company has the right to acquire the shares held by M Eco Co., Ltd. at fair value on the date when it has been third, seventh, and tenth year from the beginning date of commercial operation. However, if M Eco Co., Ltd. transfers its shares to the company holding the majority of shares in M Eco Co., Ltd., its right to transfer shares to the shareholder prevails the Company’s right to acquire shares from M Eco Co,. Ltd.
Summary of Significant Restrictions on its Abilities to Associates or Joint Ventures	(8) Significant restrictions on the Company’s abilities on associates or joint ventures as of December 31, 2023 are as follows: Company Nature and extent of any significant restrictions Daegu Green Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior written consent of financial institutions. Pyeongchang Wind Power Co., Ltd. Principals and interests on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior consent of the stakeholders. Daeryun Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions. Shares cannot be wholly or partially transferred without prior consent of the financial institutions. KNH Solar Co., Ltd. Principals and interests on subordinated loans or dividends to shareholders cannot be paid without written consent of financial institutions. Also, shares cannot be wholly or partially transferred without the consent of other stakeholders including shareholders and financial institutions. Company Nature and extent of any significant restrictions Korea Power Engineering Service Co., Ltd. Shares cannot be wholly or partially transferred without the consent of the board of directors. Daehan Wind Power PSC Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. Daejung Offshore Wind Power Co., Ltd. Before the commencement of the operation, shares cannot be wholly or partially transferred without the consent of the stakeholders. Naepo Green Energy Co., Ltd. Dividends can only be paid to shareholders when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior consent of interested parties. All or part of the stocks held cannot be transferred without the written consent of the financial institution and if the conditions for the O&M utilization rate are not met or if a payment deferment is necessary due to the fulfillment of the obligation to provide funds, the contract amount will be paid in a subordinated order. Solaseado Solar Power Co., Ltd. Principals and interests on subordinated loans or dividends can only be paid when all conditions of the shareholders’ agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of other stakeholders including shareholders and financial institutions. Samcheok Eco Materials Co., Ltd. Dividends can only be paid when all conditions of the shareholders’ agreement are satisfied. Also, shares cannot be wholly or partially transferred without the written consent of the other shareholders. Taebaek Guinemi Wind Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied and consent of the financial institutions is obtained. Also, shares cannot be wholly or partially transferred without the written consent of the financial institutions. Indeck Niles Asset Management, LLC Shares cannot be wholly or partially transferred without the consent of the stakeholders. Indeck Niles Development, LLC Shares cannot be wholly or partially transferred without the consent of the stakeholders. Chester Solar IV SpA Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. Chester Solar V SpA Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. Diego de Almagro Solar SpA Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. Laurel SpA Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. Chester Solar I SpA Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. Kelar S.A. Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, shares cannot be wholly or partially transferred without the consent of the stakeholders. GS Donghae Electric Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Busan Shinho Solar Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Honam Wind Power Co., Ltd. Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied. Seokmun Energy Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Also, principals and interests on subordinated loans can only be paid when written consent of financial institutions is obtained. Chun-cheon Energy Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Also, principals and interests on subordinated loans shall not be paid until the payment conditions are satisfied. Yeonggwangbaeksu Wind Power Co., Ltd. Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Also, principals and interests on subordinated loans can only be paid when written consent of financial institutions is obtained. Company Nature and extent of any significant restrictions Yeonggwang Wind Power Co., Ltd. Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Jamaica Public Service Company Limited Dividends can only be paid when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. PT. Tanjung Power Indonesia Dividends can only be paid when all conditions of the loan agreement are satisfied. DE Energia SpA Dividends can only be paid when all conditions of the loan agreement are satisfied. Daesan Green Energy Co., Ltd. Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Taebaek Gadeoksan Wind Power Co., Ltd. Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Also, principals and interests on subordinated loans can only be paid when prior written consent of financial institutions is obtained. Bitsolar Energy Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Omisan Wind Power Co., Ltd. Principals and interests on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied, and prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without the consent of the stakeholders including other shareholders financial institutions. Also, either of Omisan Wind Power Co., Ltd. and Unison Co., Ltd. shall not transfer their shares to others wholly or partially until 4 years have passed from the completion of power complex without the written consent from the other party. In case the shares of each party becomes less than 10% of outstanding shares after the transfer, it also requires the written consent from the other party. Yangyang Wind Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Busan Industrial Solar Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Geumsungsan Wind Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be wholly or partially transferred for 3 years after the commencement of operation, and also cannot be transferred or disposed to the third party in a way not permitted in the financial documents without prior written consent of an agent bank. KPE green energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Cheongju Eco Park Co., Ltd. Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied, or permitted by related financing contracts, or prior written consent of financial institutions is obtained. Goheung New Energy Co., Ltd. Payment of dividends or repayment of loans such as subordinated loans to the investors can only be made when all conditions of the loan agreement are satisfied, and prior written consent of financial institutions is obtained. Seungmun Green Energy Dividends and settlement amount for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Trumbull Asset Management, LLC Shares may not be either wholly or partially transferred without the consent of the stakeholders. Horang Energy Inc. Dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be either wholly or partially transferred before three years have passed after the commencement of operation, and also cannot be transferred or disposed to the third party in a way not permitted in the financial documents without prior written consent of an agent bank. Yanggu Floating Photovoltaic Power Plant Inc. Payment of dividends or repayment of loans such as subordinated loans to the investors can be made only when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Hoenggye Renewable Energy Co., Ltd. Dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Company Nature and extent of any significant restrictions Daegu Photovoltaic Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be either wholly or partially transferred without prior written consent of financial institutions is obtained. Dongducheon Dream Power Co., Ltd. Principals and interest on subordinated loans or dividends can be paid only when all conditions of the loan agreement are satisfied. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Haeng Bok Do Si Photovoltaic Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be either wholly or partially transferred without prior consent of the stakeholders. Shin Pyeongtaek Power Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Seoroseoro Sunny Power Plant Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Anjwa Smart Farm & Solar City Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Muan Solar Park Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be wholly or partially transferred without prior written consent of the financial institutions is obtained. YuDang Solar Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Haemodum Solar Co., Ltd. Principals and interest payments on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior written consent of the financial institutions is obtained. Cheongna Energy Co., Ltd. Principals and interest payments on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be wholly or partially transferred without prior written consent of the financial institutions is obtained. Hapcheon Floating Photovoltaic Power Plant Inc. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Yeongwol Eco Wind Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Gurae Resident Power Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Gunsan Land Solar Co., Ltd. Principals and interest payments on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior written consent of the financial institutions is obtained. In accordance with the shareholders’ agreement, when the internal rate of return defined in Korea Western Power Co., Ltd.’s dividend standard is met any excessive dividend income must be provided to Gunsan City. Eumseong Eco Park Co., Ltd. Dividends and settlement amounts for renewable energy certificate can only be paid when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior written consent of the financial institutions is obtained. PungBack Wind Farm Corporation Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Company Nature and extent of any significant restrictions Seobusambo highway photovoltaics Co., Ltd. Principals and interest on subordinated loans or dividends can be paid either when all conditions of the loan agreement are satisfied or when prior written consent of financial institutions is obtained. Shares cannot be either wholly or partially transferred without prior written consent of the financial institutions. Haman Green Energy Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained or prior written consent of financial institutions is obtained. In addition, the Company cannot transfer all or part of its shares without the consent of other shareholders until five years have elapsed from the date of issuance of the acquisition notice after the comprehensive completion of the EPC contract for the project, and shares cannot be wholly or partially transferred without prior written consent of the financial institutions is obtained. Jeongeup Green Power Co., Ltd. Dividends to investors are only possible when the conditions in the loan agreement are met or prior written consent from the financial institution is obtained, and subordinated loans cannot be paid to investors before the loan principal and interest are fully repaid. Additionally, all or part of the shares held cannot be transferred without the consent of other shareholders before the commencement of commercial operation of this business. The company’s stocks may not be transferred to a third party or otherwise disposed of in a manner not permitted in the financial documents without the prior written consent of the agent bank. Nepal Water & Energy Development Company Private Limited The Company must maintain a minimum percentage of ownership (50%) until the project completion date and thereafter. Goseong Green Power Co., Ltd. The Company cannot transfer all or part of its shares without the consent of stakeholders until three years have passed since the start of commercial operation of the business. Gangneung Eco Power Co., Ltd. The Company cannot transfer all or part of its shares without the consent of stakeholders until three years have passed since the start of commercial operation of the business. S-Power Co., Ltd. Dividends can only be paid when all conditions of the loan agreement are satisfied. Shares cannot be wholly or partially transferred without prior consent of the stakeholders is obtained South Jamaica Power Company Limited Dividends can be paid only when all conditions of the loan agreement signed between South Jamaica Power Company Limited and financial institutions are satisfied, and prior written consent of financial institutions is obtained.

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [abstract]
Summary of Property, Plant and Equipment	(1) Property, plant and equipment as of December 31, 2022 and 2023 are as follows: 2022 Acquisition cost Government grants Accumulated depreciation Accumulated losses Book value In millions of won Land ￦ 14,298,409 (27,405 ) —  (27,472 ) 14,243,532 Buildings 24,230,827 (50,437 ) (10,931,672 ) (6,955 ) 13,241,763 Structures 83,055,890 (165,608 ) (32,596,265 ) (10,390 ) 50,283,627 Machinery 108,749,243 (127,126) (54,015,594 ) (541,864 ) 54,064,659 Ships 17,264 —  (3,788 ) —  13,476 Vehicles 393,046 (2,045 ) (305,242 ) (117 ) 85,642 Equipment 2,168,348 (6,608 ) (1,732,564 ) (43 ) 429,133 Tools 1,306,509 (99 ) (1,128,002 ) (6 ) 178,402 Construction-in-progress 28,064,266 (135,926 ) —  (22,795 ) 27,905,545 Right-of-use 5,992,724 —  (2,281,599 ) —  3,711,125 Asset retirement costs 17,620,603 —  (6,185,214 ) (146,422 ) 11,288,967 Others 15,520,160 —  (13,100,723 ) —  2,419,437 ￦ 301,417,289     (515,254 ) (122,280,663 )    (756,064 ) 177,865,308 2023 Acquisition cost Government grants Accumulated depreciation Accumulated losses Book value In millions of won Land ￦ 14,426,253 (27,404 ) —  (28,165 ) 14,370,684 Buildings 25,236,830 (46,227 ) (11,870,875 ) (5,751 ) 13,313,977 Structures 86,010,823 (157,881 ) (35,111,297 ) (9,525 ) 50,732,120 Machinery 113,735,035 (119,824 ) (59,381,603 ) (536,386 ) 53,697,222 Ships 17,845 —  (5,480 ) —  12,365 Vehicles 421,349 (2,837 ) (337,859 ) (116 ) 80,537 Equipment 2,341,242 (5,932 ) (1,909,992 ) (375 ) 424,943 Tools 1,354,532 (62 ) (1,190,057 ) (1 ) 164,412 Construction-in-progress 32,031,297 (173,474 ) —  (22,795 ) 31,835,028 Right-of-use 6,041,794 —  (2,678,051 ) —  3,363,743 Asset retirement costs 17,007,088 —  (7,127,091 ) (146,423 ) 9,733,574 Others 16,255,667 —  (14,108,737 ) —  2,146,930 ￦ 314,879,755     (533,641 ) (133,721,042 )    (749,537 ) 179,875,535
Summary of Changes in Property, Plant and Equipment	(2) Changes in property, plant and equipment for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisition Disposal Depreciation Impairment Others Ending balance In millions of won Land ￦ 14,107,965 9,535 (49,377 ) —  —  202,814 14,270,937 (Government grants) (23,474 ) —  1 —  —  (3,932 ) (27,405 ) Buildings 12,926,226 3,202 (19,918 ) (906,528 ) (449 ) 1,289,667 13,292,200 (Government grants) (52,122 ) —  —  5,360 —  (3,675 ) (50,437 ) Structures 48,290,052 217,450 (277,308 ) (2,677,395 ) (3,669 ) 4,900,105 50,449,235 (Government grants) (172,021 ) —  1,250 9,568 —  (4,405 ) (165,608 ) Machinery 51,755,382 248,932 (188,924 ) (5,748,407 ) (33,191 ) 8,157,993 54,191,785 (Government grants) (140,082 ) —  405 17,283 —  (4,732 ) (127,126 ) Ships 177 —  —  (1,053 ) —  14,352 13,476 Vehicles 89,257 1,813 (88 ) (41,907 ) —  38,612 87,687 (Government grants) (1,675 ) —  —  663 —  (1,033 ) (2,045 ) Equipment 397,183 79,369 (183 ) (205,908 ) (1 ) 165,281 435,741 (Government grants) (149 ) —  —  494 —  (6,953 ) (6,608 ) Tools 183,065 25,291 (180 ) (77,902 ) —  48,227 178,501 (Government grants) (64 ) —  —  32 —  (67 ) (99 ) Construction-in-progress 30,156,094 11,671,907 (197,293 ) —  134,735 (13,723,972 ) 28,041,471 (Government grants) (111,822 ) 23,155 17 —  —  (47,276 ) (135,926 ) Right-of-use 4,059,397 197,016 (2,838 ) (509,068 ) —  (33,382 ) 3,711,125 Asset retirement costs 8,925,388 —  —  (1,133,866 ) —  3,497,445 11,288,967 Others 2,745,861 9,028 (22,531 ) (1,036,132 ) —  723,211 2,419,437 ￦ 173,134,638 12,486,698 (756,967) (12,304,766)     97,425 5,208,280 177,865,308 2023 Beginning Acquisition Disposal Depreciation Impairment(*) Others Ending balance In millions of won Land ￦ 14,270,937 23,519 (15,302 ) —  —  118,934 14,398,088 (Government grants) (27,405 ) —  1 —  —  —  (27,404 ) Buildings 13,292,200 3,706 (6,221 ) (938,549 ) —  1,009,068 13,360,204 (Government grants) (50,437 ) —  —  5,070 —  (860 ) (46,227 ) Structures 50,449,235 18,486 (311,877 ) (2,828,065 ) —  3,562,222 50,890,001 (Government grants) (165,608 ) —  1,611 9,562 —  (3,446 ) (157,881 ) Machinery 54,191,785 184,532 (195,673 ) (6,062,471 ) (6,331 ) 5,705,204 53,817,046 (Government grants) (127,126 ) —  1,230 17,413 —  (11,341 ) (119,824 ) Ships 13,476 —  —  (1,812 ) —  701 12,365 Vehicles 87,687 5,778 (76 ) (40,760 ) —  30,745 83,374 (Government grants) (2,045 ) —  —  960 —  (1,752 ) (2,837 ) Equipment 435,741 62,291 (264 ) (206,894 ) —  140,001 430,875 (Government grants) (6,608 ) —  —  2,011 —  (1,335 ) (5,932 ) Tools 178,501 30,598 (364 ) (78,487 ) —  34,226 164,474 (Government grants) (99 ) —  —  38 —  (1 ) (62 ) Construction-in-progress 28,041,471 14,069,968 (1,511 ) —  (10,700 ) (10,090,726 ) 32,008,502 (Government grants) (135,926 ) 5,544 —  —  —  (43,092 ) (173,474 ) Right-of-use assets 3,711,125 261,862 (2,613 ) (536,517 ) —  (70,114 ) 3,363,743 Asset retirement costs 11,288,967 —  —  (1,251,446 ) —  (303,947 ) 9,733,574 Others 2,419,437 1,290 —  (958,649 ) —  684,852 2,146,930 ￦ 177,865,308 14,667,574 (531,059 ) (12,868,596 )    (17,031 )   759,339 179,875,535 (*) The Company is in the process of calculating the actual damage in relation to Taean IGCC gas refinery fire incident in January 2023. For the year ended December 31, 2023, the Group recognized ￦6,331 million of estimated damage to its PP&E due to the fire incident as impairment loss, and the estimated damage may change depending on future investigations. In addition, as the recoverable amount of construction-in-progress of Guam Ukudu Power LLC, a subsidiary of the Group, is less than the book value, ￦10,700 million was recognized as an impairment loss during the year ended December 31, 2023. (3) The Company’s subsidiaries including Korea Hydro & Nuclear Power Co., Ltd. have recognized proceeds and costs from selling items produced before its intended use, by accounting ￦38,149 million (prior year : ￦94,264 million) as revenue and ￦45,578 (prior year : ￦63,405 million) as expense in profit or loss for the year ended December 31, 2023.

Investment Properties (Tables)

Investment Properties (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about investment property [abstract]
Summary of Investment Properties	(1) Investment properties as of December 31, 2022 and 2023 are as follows: 2022 Acquisition Government Accumulated Book value In millions of won Land ￦ 194,417 —  —  194,417 Buildings 20,241 (21 ) (6,351 ) 13,869 ￦      214,658      (21 )     (6,351 )     208,286 2023 Acquisition Government Accumulated Book value In millions of won Land ￦ 172,594 —  —  172,594 Buildings 20,043 (22 ) (7,088 ) 12,933 ￦     192,637   (22 )   (7,088 )     185,527
Summary of Changes in Investment Properties	(2) Changes in investment properties for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Disposal Depreciation Others Ending In millions of won Land ￦ 201,605   (208 ) —  (6,980 ) 194,417 Buildings 11,209 —  (487 )  3,168 13,890 (Government grants) (30 ) —      1 8 (21 ) ￦ 212,784 (208 ) (486 ) (3,804 ) 208,286 2023 Beginning Disposal Depreciation Others Ending In millions of won Land ￦ 194,417 —  —  (21,823 ) 172,594 Buildings 13,890 —  (494 ) (441 ) 12,955 (Government grants) (21 ) —  1 (2 ) (22 ) ￦ 208,286 —  (493 ) (22,266 ) 185,527
Summary of Income and Expenses Related to Investment Properties	(3) Income and expenses related to investment properties for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Rental income ￦ 9,775 10,519 Operating and maintenance expenses related to rental income (587 ) (507 ) ￦  9,188 10,012
Summary of Fair Value of Investment Properties	(4) Fair value of investment properties as of December 31, 2022 and 2023 are as follows: 2022 2023 Book value Fair value Book value Fair value In millions of won Land ￦ 194,417 292,827 172,594 258,478 Buildings 13,869 15,626 12,933 13,437 ￦ 208,286 308,453 185,527 271,915

Construction Contracts (Tables)

Construction Contracts (Tables)	12 Months Ended
	Dec. 31, 2023
Construction Contracts [Abstract]
Summary of Changes in Total Contract Amount in Which Revenue is Not Yet Recognized	(1) Changes in total contract amount in which revenue is not yet recognized for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 Beginning balance Increase Recognized as revenue Ending balance In millions of won Nuclear power plant construction in overseas ￦   3,152,725     386,208    (754,998 )   2,783,935 (*) For the year ended December 31, 2021, the increased balance of contracts from new orders is ￦458,635 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦72,427 million. 2022 Beginning balance Increase Recognized as revenue Ending balance In millions of won Nuclear power plant construction in overseas ￦   2,783,935    3,457,964    (646,953 )   5,594,946 (*) For the year ended December 31, 2022, the increased balance of contracts from new orders is ￦3,578,599 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦81,401 million. 2023 Beginning balance Increase (decrease) (*) Recognized as revenue Ending In millions of won Nuclear power plant construction in overseas and others ￦   5,594,946     986,049    (785,395 ) 5,795,600 (*) For the year ended December 31, 2023, the increased balance of contracts from new orders is ￦1,029,165 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦43,116 million.
Summary of Accumulated Earned Revenue, Expense and Others	(2) Accumulated earned revenue, expense and others related to the Company’s construction contracts in progress as of December 31, 2022 and 2023 are as follows: 2022 Accumulated earned revenue Accumulated expense Accumulated profit Unearned advance receipts In millions of won Nuclear power plant construction in overseas ￦  22,507,004  21,666,552   840,452     29,877 2023 Accumulated earned revenue Accumulated expense Accumulated profit Unearned advance receipts In millions of won Nuclear power plant construction in overseas and others ￦ 22,996,785 22,382,628 614,157 74,253
Summary of Gross Amount of Assets and Liabilities for Contract	(3) Gross amount due from customers recognized as contract assets and due to customers recognized as contract liabilities for contract work as of December 31, 2022 and 2023 are as follows: 2022 2023 Contract Contract Contract Contract In millions of won Nuclear power plant construction in overseas and others ￦ 118,983 120,952 183,204 270,789 (*1) Included in trade and other receivables, net, in the consolidated statements of financial position. The balance of trade receivables from construction contracts are ￦85,757 million and ￦101,180 million, as of December 31, 2022 and 2023, respectively. (*2) Included in non-financial liabilities as advance received in the consolidated statements of financial position. The revenue recognized on December 31, 2023 from the amounts included in contract liabilities at the end of the prior year is ￦117,311 million.

Intangible Assets other than _2

Intangible Assets other than Goodwill (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about intangible assets [abstract]
Summary of Intangible Asset Explanatory	(1) Intangible assets as of December 31, 2022 and 2023 are as follows: 2022 Acquisition Government Accumulated Accumulated Book value In millions of won Software ￦ 1,002,040 (174 ) (799,013 ) (20 ) 202,833 Copyrights, patents rights and other industrial rights 104,559 —  (67,368 ) (9,178 ) 28,013 Mining rights 625,845 —  (46,187 ) (541,133 ) 38,525 Development expenditures 938,032 (3,477 ) (883,527 ) —  51,028 Intangible assets under development 76,625 (2,108 ) —  (8,903 ) 65,614 Usage rights of donated assets and others 592,797 —  (435,518 ) (136 ) 157,143 Leasehold rights 28,185 —  (23,297 ) —  4,888 Greenhouse gas emissions rights 43,960 —  —  —  43,960 Others 551,396 (67 ) (174,714 ) (11,955 ) 364,660 ￦   3,963,439       (5,826 )   (2,429,624 )     (571,325 )     956,664 2023 Acquisition Government Accumulated Accumulated Book value In millions of won Software ￦ 1,083,537 (413 ) (885,677 ) (19 ) 197,428 Copyrights, patents rights and other industrial rights 105,827 —  (73,158 ) (9,178 ) 23,491 Mining rights 643,625 —  (57,549 ) (553,911 ) 32,165 Development expenditures 966,530 (2,121 ) (911,096 ) —  53,313 Intangible assets under development 94,916 (2,458 ) —  (8,903 ) 83,555 Usage rights of donated assets and others 592,739 —  (447,352 ) (136 ) 145,251 Leasehold rights 28,185 —  (24,256 ) —  3,929 Greenhouse gas emissions rights 107,086 —  —  —  107,086 Others 599,958 (322 ) (199,865 ) (12,005 ) 387,766 ￦   4,222,403       (5,314 )   (2,598,953 )     (584,152 )   1,033,984
Summary of Changes in Intangible Assets	(2) Changes in intangible assets for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisition Disposal Amortization Reversal Others Ending In millions of won Software ￦ 162,596 22,532 (57 ) (84,649 ) —  102,585 203,007 (Government grants) (91 ) —  —  60 —  (143 ) (174 ) Copyrights, patents rights and other industrial rights 35,187 270 (37 ) (7,136 ) —  (271 ) 28,013 Mining rights 41,902 2,395 —  (4,296 ) —  (1,476 ) 38,525 Development expenditures 72,944 —  —  (24,238 ) —  5,799 54,505 (Government grants) (3,820 ) —  —  1,466 —  (1,123 ) (3,477 ) Intangible assets under development 81,430 39,559 —  —  (14 ) (53,253 ) 67,722 (Government grants) (7,326 ) —  —  —  —  5,218 (2,108 ) Usage rights of donated assets and others 169,783 —  —  (11,394 ) (150 ) (1,096 ) 157,143 Leasehold rights 5,848 —  —  (960 ) —  —  4,888 Greenhouse gas emissions rights 78,137 57,466 —  —  —  (91,643 ) 43,960 Others 407,558 4,073 (260 ) (25,017 ) —  (21,627 ) 364,727 (Government grants) (71 ) —  —  4 —  —  (67 ) ￦   1,044,077     126,295         (354 )     (156,160 )        (164 ) (57,030 )     956,664 2023 Beginning Acquisition Disposal Amortization Impairment Others Ending In millions of won Software ￦     203,007 12,837 (18 ) (86,174 ) —  68,189 197,841 (Government grants) (174 ) —  —  85 —  (324 ) (413 ) Copyrights, patents rights and other industrial rights 28,013 319 (70 ) (4,918 ) (180 ) 327 23,491 Mining rights 38,525 2,164 —  (10,289 ) —  1,765 32,165 Development expenditures 54,505 —  —  (25,614 ) —  26,543 55,434 (Government grants) (3,477 ) —  —       1,356       —  —  (2,121 ) Intangible assets under development 67,722 51,282 —  —  —  (32,991 ) 86,013 (Government grants) (2,108 ) —  —  —  —  (350 ) (2,458 ) Usage rights of donated assets and others 157,143 —  —  (11,857 ) —  (35 ) 145,251 Leasehold rights 4,888 —  —  (959 ) —  —  3,929 Greenhouse gas emissions rights 43,960 8,577 (1 ) (2 ) —  54,552 107,086 Others 364,727 4,136 (119 ) (24,895 ) (103 ) 44,342 388,088 (Government grants) (67 ) —        —  93 —  (348 ) (322 ) ￦ 956,664     79,315 (208 ) (163,174 ) (283 ) 161,670   1,033,984
Summary of Significant Specific Intangible Assets	(3) Significant specific intangible assets as of December 31, 2022 and 2023 are as follows: 2022 Type Description Currency Amount Remaining useful lives In millions of won and thousands of Australian dollars Software ORACLE license for SDIS integrated DB KRW 5,509 3 years and 4 months Copyrights, patents rights and other industrial rights Contributions to APR NRC DC KRW 20,871 5 years Mining rights Mining rights of Bylong mine AUD —  — (*) Usage rights of donated assets and others Sejong Haengbogdosi sharing charge KRW 17,772 3 years and 11 months Right of use electricity and gas supply facility (Community district of Songdo) KRW 7,908 7 years and 6 months Others Occupancy and use of public waters KRW 76,212 14 years and 1 month Greenhouse gas emissions rights KRW 43,960 —  Business rights KRW 154,712 26 years and 11 months (*)   The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full. 2023 Type Description Currency Amount Remaining useful lives In millions of won and thousands of Australian dollars Software S/4HANA ERP license KRW 5,742 3 years and 11 months Copyrights, patents rights and other industrial rights Contributions to APR NRC DC KRW 16,697 4 years Mining rights Mining rights of Bylong mine AUD —  —  (*) Usage rights of donated assets and others Sejong Haengbogdosi sharing charge KRW 13,235 2 years and 11 months Right of use electricity and gas supply facility (Community district of Songdo) KRW 6,853 6 years and 6 months Others Occupancy and use of public waters KRW 70,800 13 years and 1 month Greenhouse gas emissions rights KRW 107,086 —  Business rights KRW 148,964 25 years and 11 months (*)   The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.
Summary of Recognized Research and Development Expenses	(4) For the years ended December 31, 2021, 2022 and 2023, the Company recognized research and development expenses of 689,397 million, 727,810 million, and 717,561 million, respectively.

Trade and Other Payables (Table

Trade and Other Payables (Tables)	12 Months Ended
	Dec. 31, 2023
Trade and other payables [abstract]
Summary of Trade and Other Payables Explanatory	Trade and other payables as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Trade payables ￦ 7,529,857 —  4,341,482 —  Non-trade 2,132,838 2,023,985 2,140,906 1,716,345 Accrued expenses 1,605,118 6,351 1,859,765 23,148 Leasehold deposits received 2,479 35 2,548 1,042 Other deposits received 97,408 47,863 127,933 33,723 Lease liabilities 614,037 3,549,106 612,765 3,195,115 Dividends payable 1,812 —  4,574 —  Others(*) —  11,574 —  12,584 ￦   11,983,549  5,638,914 9,089,973 4,981,957 (*) Details of others as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Advance received from local governments ￦ —  3,477 —  3,069 Others —  8,097 —  9,515 ￦         —  11,574 —  12,584

Borrowings and Debt Securities

Borrowings and Debt Securities (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about borrowings [abstract]
Summary of Borrowings And Debt Securities	(1) Borrowings and debt securities as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Current liabilities Short-term borrowings ￦ 8,820,425 10,667,335 Current portion of long-term borrowings 3,638,202 5,780,638 Current portion of debt securities 10,205,395 24,681,439 Less: Current portion of discount on long-term borrowings (774 ) (1,152 ) Less: Current portion of discount on debt securities (4,246 ) (7,176 ) Add: C —  263  22,659,002 41,121,347 Non-current Long-term borrowings 2,977,268 3,407,514 Debt securities 95,160,920 89,293,561 Less: Discount on long-term borrowings (14,945 ) (14,683 ) Less: Discount on debt securities (177,543 ) (175,909 ) Add: Premium on debt securities 663 —  97,946,363 92,510,483 ￦ 120,605,365 133,631,830
Repayment Schedule of Borrowings and Debt Securities	(2) Repayment schedule of borrowings and debt securities as of December 31, 2022 and 2023 are as follows: 2022 Type Borrowings Debt Securities   In millions of won Less than 1 year ￦ 12,458,627 10,205,395 1~ 5 years 1,472,655 65,278,587 Over 5 years 1,504,613 29,882,333 ￦  15,435,895 105,366,315 2023 Type Borrowings Debt Securities   In millions of won Less than 1 year ￦ 16,447,973 24,681,439 1~ 5 years 1,649,696 64,342,617 Over 5 years 1,757,818 24,950,944 ￦  19,855,487 113,975,000
Short-term Borrowings	(3) Short-term borrowings as of December 31, 2022 and 2023 are as follows: 2022 Type Creditor Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of USD Local short-term borrowings DB Financial Investment and others 3.21~5.80 2023.01.02 —  ￦ 5,549,120 Local short-term borrowings Nonghyup Bank and others 3M CD+1.11~1.70 2023.05.25 —  3,000,000 Local short-term borrowings Shinhan Bank 6M Bank debenture 2023.11.17 —  50,000 Local short-term borrowings Korea Development Bank 4.15 2023.01.06 —  3,400 Foreign short-term borrowings Shinhan Bank 5.19 2023.02.28 USD 12,045 15,264 Foreign short-term borrowings Shinhan Bank SOFR(1M)+0.65 2023.02.27 USD 40,000 50,692 Foreign short-term borrowings Kookmin Bank and others 3.32~5.88 2023.01.09  USD 91,796 116,333 Local bank overdraft Woori Bank and others Standard overdraft 2023.01.06  —  35,616 ￦ 8,820,425 2023 Type Creditor Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of USD Local short-term borrowings DB Financial Investment and others 4.00~4.84 2024.01.05 —  ￦ 6,180,339 Local short-term borrowings Nonghyup Bank and others 3M CD +0.98 2024.05.26 —  4,300,000 Local short-term borrowings Korea Development Bank Standard 2024.02.24 —  30,000 Local short-term borrowings Export-Import Bank of Korea 3M Bank 2024.12.27 —  50,000 Foreign short-term borrowings Export-Import Bank of Korea 5.49 2024.09.27 USD 40,000 51,576 Foreign short-term borrowings Kookmin Bank SOFR(1M)+0.95 2024.02.16 USD 40,000 51,576 Local bank overdraft Woori Bank and others Standard 2024.01.05 —  3,844 ￦ 10,667,335
Long-term Borrowings	(4) Long-term borrowings as of December 31, 2022 and 2023 are as follows: 2022 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of foreign currencies Local long-term borrowings Korea Development Bank Others 0.50 2023~2044 —  ￦ 2,133 Facility 2.50 4.60 2023~2028 —  28,420 Facility CB rate+0.90 2029 —  9,985 Operating funds 1yr KDB rate +0.81~0.91 2023~2024 —  54,300 Hana Bank and others Commercial Paper 3M CD+0.13~1.20 2023~2027 —  3,250,000 Facility 4.60 2028 —  8,137 Facility 3yr KTB rate-1.50 2028 —  3,821 Export-Import Bank of Korea Project loans 1.50 2026 —  10,312 Facility 1.32 2028 —  58,100 Operating funds 1.78 2023 —  15,700 Korea Energy Agency Development of power resources 3yr KTB rate-2.25 1.50~1.75 2023~2028 —  11,175 Facility 3yr KTB rate-2.50 2023~2024 —  393 Project loans —  2023~2027 —  1,197 Shinhan Bank and others Facility CB rate+0.90~1.10 2028~2029 —  19,195 Commercial Paper 3M CD+0.38 2025 —  150,000 Others 3.95 2034 —  78,905 Others Standard overdraft rate+1.00 2034 —  78,905 Kookmin Bank Facility MOR+0.79 3M CD+1.79 5.04 2023~2035 —  105,155 Others 4.00 2025 —  20,700 Woori Bank  Facility 3M Libor 5.04 2035~2042 —  48,823 2022 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of foreign currencies Others Facility 3.50~6.80 2028~2044 —  ￦ 690,259 Facility CB rate+1.10 1.75~4.56 2024~2036 —  103,131 PF Refinancing CB rate+1.25 2030 —  7,634 PF Refinancing 4.10 2030 —  21,206 Securitized debts (*) 3M CD+1.80 2025 —  33,476 Others 4.40~7.90 2023~2039 —  120,217 Others 1.80~4.50 2031~2034 —  49,929 ￦ 4,981,208 Foreign long-term borrowings Korea Energy Agency Project loans —  2026 USD 8,744 11,081 Export-Import Bank of Korea and others Direct Loan and others 6M Libor+3.20 2036 USD 78,094 98,969 Direct Loan and others 3M Libor+2.25~3.70 2027 JOD 91,051 162,692 Facility 2029~2032 USD 132,168 167,496 Kookmin Bank and others EBL SOFR(1M)+0.11~0.75 2024 USD 149,592 189,578 Riyad Bank EBL SOFR(3M)+1.20 2025 USD 49,870 63,201 POSCO and others Shareholder’s loan 8.00 2025 USD 10,005 12,680 Shareholder’s loan 8.00 2031 JOD 4,853 8,671 Samsung Life Insurance and others Syndicated Loan 3.10~8.00 2032 JPY 4,752,934 45,304 Woori Bank and others Syndicated Loan JPY 6M Libor+1.84 2032 JPY 2,613,385 24,910 Solar Construction Lendings, LLC Facility 5.00 2025 USD 31,140 39,464 KiwoomSolar Power Professional Investor Private Placement Investment Trust V Senior borrowing 3.90 2029 EUR 40,531 54,765 IFC and others Facility 6M Libor+5.00 SOFR(3M)+1.83~1.99 5.41 2028~2031 USD 408,408 517,575 Hanwha US Solar Private Fund and others Facility 3.00 2038 USD 58,308 73,894 DBS Bank and others Facility 1M BBSY+1.40~2.25 2025 AUD 190,860 163,836 Others Others —  —  USD 116 146 1,634,262 6,615,470 Less: Discount on long-term borrowings (15,719 ) Less: Current portion of long-term borrowings (3,638,202 ) Add: Current portion of discount on long-term borrowings 774 ￦ 2,962,323 (*) The main reasons for early repayment of securitized debts as of December 31, 2022 are as follows: Type Details Non-payment Where the consignor fails to pay the principal to the trustee Guarantees for supplemental funding Where the consignor fails to fulfill guarantees for supplemental funding Additional trust obligation Where the consignor fails to fulfill the additional trust obligation Event of default In case the event of default occurs under the ABL loan agreement The C ompany 2023 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won Local long-term borrowings Korea Development Bank Others 0.50 2024~2044 —  ￦ 1,758 Facility 2.60~4.94 2025~2042 —  53,052 Facility CB rate+0.90 2029 —  9,985 Operating funds 1yr KDB rate+0.91 2024 —  40,000 Hana Bank and others Commercial Paper 3M CD+0.13~1.20 2024~2028 —  5,350,000 Facility 4.60 2028 —  6,558 Facility 3yr KTB rate-2.50 2028 —  3,156 Export-Import Bank of Korea Project loans 1.00 2026 —  7,365 Facility 1.32 2028 —  80,000 Operating funds 3M Bank debenture rate +0.66 2026 —  40,000 Korea Energy Agency Development of power resources 3yr KTB rate-2.25 2.25 2024~2028 —  9,176 Facility 3yr KTB rate-1.50 2024 —  163 Project loans —  2033 —  1,197 Shinhan Bank and others Facility CB rate+0.90~1.10 2028~2029 —  16,825 Operating funds 6M Bank debenture rate+0.93 2025 —  20,000 Commercial Paper 3M CD+0.38 2025 —  150,000 Others 3.95 2034 —  73,425 Others Standard overdraft rate+1.00 2034 —  73,425 Kookmin Bank Facility 1yr B 3M CD+1.79~2.10 5.04 2025~2037 —  186,032 Woori Bank Facility Standard overdraft rate+1.00 3M CD+1.90 5.04 2034~2042 —  101,172 IBK Facility 4.00~5.80 2042~2044 —  30,690 Nonghyup Bank Facility 3M CD+2.00~2.10 2030~2041 —  22,517 Others Facility 3.50~6.80 2028~2042 —  735,722 Facility CB rate+1.10 3M CD+2.10 1.75~3.30 2024~2041 —  51,509 PF Refinancing CB rate+1.25 2030 —  6,680 PF Refinancing 4.10 2030 —  18,556 Securitized debts (*) 3M CD+1.80 2025 —  52,060 Others 4.40~7.90 2025~2039 —  113,973 Others 1.80~4.50 2031~2034 —  49,879 ￦ 7,304,875 2023 Type Interest rate (%) Maturity Foreign currency Local currency In millions of won and thousands of foreign currencies Foreign long-term borrowings Korea Energy Agency Project loans — 2026 USD 8,744 ￦ 11,274 Export-Import Bank Direct Loan and others 6M Synthetic Libor+1.80~3.20 2036 USD 78,347 101,020 Direct Loan and others 6M Synthetic Libor+2.25~3.70 2027 JOD 62,385 113,390 Facility 6M Synthetic Libor+1.70~2.50 SOFR(1M)+ 1.83 2029 2031 USD 120,916 155,909 Korea Development Bank and others EBL SOFR(1M)+0.86 2025 USD 142,049 183,157 POSCO and others Shareholder’s loan 5.60~8.00 2025 USD 10,770 13,887 Shareholder’s loan 8.00 2031 JOD 5,419 9,850 Samsung Life Insurance and others Syndicated Loan 3.10~8.00 2032 JPY 4,350,671 39,707 Woori Bank and others Syndicated Loan JPY 6M Tibor+1.84 2032 JPY 2,399,088 21,896 Solar Construction Lending, LLC Facility 5.00 2025 USD 29,894 38,545 KiwoomSolar Power Professional Investor Private Placement Investment Trust V Senior borrowing 3.90 2029 EUR 40,478 57,745 IFC and others Facility SOFR(3M)+1.99 SOFR(6M)+5.00 3M BSBY+ 1.70 2024~2031 USD 655,922 845,746 Hanwha US Solar Private Fund and others Facility 6.00 2039 USD 60,674 78,233 DBS Bank and others Facility 1M BBSY+1.40~2.25 2025 AUD 185,086 162,891 Nonghyup Bank and others Facility 10.40 2039 USD 38,799 50,027 1,883,277 9,188,152 Less: D (15,835 ) Less: C (5,780,638 ) Add: C 1,152 ￦ 3,392,831 (*) The main reasons for early repayment of securitized debts as of December 31, 2023 are as follows: Type Details Non-payment Where the consignor fails to pay the principal to the trustee Guarantees for supplemental funding Where the consignor fails to fulfill guarantees for supplemental funding Additional trust obligation Where the consignor fails to fulfill the additional trust obligation Event of default In case the event of default occurs under the ABL loan agreement The Company is responsible for collateral obligations (fund supplementation) and liability guarantees for entrusted assets.
Local Debt Securities	(5) Local debt securities as of December 31, 2022 and 2023 are as follows: Issue date Maturity Interest rate (%) 2022 2023 In millions of won Electricity Bonds 2012.03.27~2023.09.11 2023.01.08~2052.04.21 1.43~5.99 ￦ 61,190,000 67,730,000 Corporate Bonds (*) 2009.10.16~2023.12.21 2024.01.12~2053.11.10 1.21~10.00 29,293,188 29,887,353 Corporate Bonds 2021.05.26~2023.12.28 2041.05.25~2043.09.15 2.00 ~3.78 11,578 41,578 90,494,766 97,658,931 Less: Discount on local debt securities (56,924 ) (54,826 ) Less: Current portion of local debt securities (8,401,619 ) (23,141,584 ) Add: Current portion of discount on local debt securities 2,344 4,712 ￦ 82,038,567 74,467,233 (*) Among the corporate bonds, each holder of Hee Mang Sunlight Power Co., Ltd.’s private equity bonds, amounting to ￦1,584 million, may exercise the early redemption rights on the 5th year (March 31, 2021) from the date of issuance of the bonds and every year on March 31 thereafter, until the year before the redemption date.
Foreign Debt Securities	(6) Foreign debt securities as of December 31, 2022 and 2023 are as follows: 2022 Type Issue date Maturity Interest rate (%) Foreign currency Local currency In millions of won and thousands of foreign currencies FY-96 1996.04.01~1996.12.06 2026.12.01~2096.04.01 6.00~7.95 USD 278,701 ￦ 353,198 FY-97 1997.01.31~1997.08.04 2027.02.01~2027.08.01 6.75~7.00 USD 314,717 398,841 FY-04 2004.04.23 2034.04.23 5.13 USD 286,920 363,614 FY-14 2014.07.30 2029.07.30 3.57 USD 100,000 126,730 FY-15 2015.06.15 2025.06.15 3.25 USD 300,000 380,190 FY-17 2017.07.25 2027.07.25 3.13 USD 300,000 380,190 FY-17 2017.10.30 2037.10.30 1.70 EUR 40,000 54,048 FY-17 2017.11.16 2037.11.16 2.36 SEK 450,000 54,527 FY-18 2018.03.13 2028.03.13 3.35 HKD 1,650,000 268,208 FY-18 2018.06.07~2018.07.25 2023.06.07~2023.07.25 3.75~3.88 USD 1,400,000 1,774,220 FY-19 2019.02.27 2024.02.27 0.13 CHF 200,000 274,574 FY-19 2019.06.24 2024.06.24 2.50 USD 500,000 633,650 FY-19 2019.07.19 2024.07.19~2027.07.19 0.00~0.05 CHF 300,000 411,861 FY-19 2019.10.30 2024.10.30 3M BBSW+0.97 AUD 300,000 257,523 FY-19 2019.12.19 2037.12.31 3.30~5.70 USD 360,899 457,368 FY-20 2020.02.03 2025.02.03 2.13 USD 300,000 380,190 FY-20 2020.05.06 2025.05.06 1.75 USD 500,000 633,650 FY-20 2020.06.15 2025.06.15 1.13 USD 500,000 633,650 FY-20 2020.08.03 2026.02.03 1.00 USD 300,000 380,190 FY-21 2021.01.27 2026.01.27 0.75 USD 450,000 570,285 FY-21 2021.04.27 2026.04.27 1.25 USD 500,000 633,650 FY-21 2021.08.09 2026.08.09 1.25 USD 300,000 380,190 FY-21 2021.09.24 2026.09.24 1.13 USD 300,000 380,190 FY-22 2022.04.21 2027.04.21 3.63 USD 300,000 380,190 FY-22 2022.05.06 2025.05.06 3.60 USD 500,000 633,650 FY-22 2022.06.14 2025.06.14~2027.06.14 3.63~4.00 USD 800,000 1,013,840 FY-22 2022.06.28 2025.06.28 4.13 USD 300,000 380,190 FY-22 2022.07.27 2027.07.27 4.25 USD 700,000 887,110 FY-22 2022.10.06 2026.04.06~2028.04.06 5.38~5.50 USD 800,000 1,013,840 FY-22 2022.10.06~2022.11.01 2032.10.06 5.16 HKD 2,350,000 381,992 14,871,549 Less: Discount on foreign debt securities (124,865 ) Add: Premium on foreign debt securities 663 Less: Current portion of foreign debt securities (1,803,776 ) Add: Current portion of discount on foreign debt securities 1,902 ￦ 12,945,473 2023 Type Issue date Maturity Interest rate (%) Foreign currency Local currency In millions of won and thousands of foreign currencies FY-96 1996.04.01~1996.12.06 2026.12.01~2096.04.01 6.00~7.95 USD 278,701 ￦ 359,357 FY-97 1997.01.31~1997.08.04 2027.02.01~2027.08.01 6.75~7.00 USD 314,717 405,796 FY-04 2004.04.23 2034.04.23 5.13 USD 286,920 369,955 FY-14 2014.07.30 2029.07.30 3.57 USD 100,000 128,940 FY-15 2015.06.15 2025.06.15 3.25 USD 300,000 386,820 FY-17 2017.07.25 2027.07.25 3.13 USD 300,000 386,820 FY-17 2017.10.30 2037.10.30 1.70 EUR 40,000 57,064 FY-17 2017.11.16 2037.11.16 2.36 SEK 450,000 58,050 FY-18 2018.03.13 2028.03.13 3.35 HKD 1,650,000 272,349 FY-19 2019.02.27 2024.02.27 0.13 CHF 200,000 305,364 FY-19 2019.06.24 2024.06.24 2.50 USD 500,000 644,700 FY-19 2019.07.19 2024.07.19~2027.07.19 0.00~0.05 CHF 300,000 458,046 FY-19 2019.10.30 2024.10.30 3M BBSW+0.97 AUD 300,000 264,024 FY-19 2019.12.19 2037.12.31 3.30~5.70 USD 342,753 441,946 FY-20 2020.02.03 2025.02.03 2.13 USD 300,000 386,820 FY-20 2020.05.06 2025.05.06 1.75 USD 500,000 644,700 FY-20 2020.06.15 2025.06.15 1.13 USD 500,000 644,700 FY-20 2020.08.03 2026.02.03 1.00 USD 300,000 386,820 FY-21 2021.01.27 2026.01.27 0.75 USD 450,000 580,230 FY-21 2021.04.27 2026.04.27 1.25 USD 500,000 644,700 FY-21 2021.08.09 2026.08.09 1.25 USD 300,000 386,820 FY-21 2021.09.24 2026.09.24 1.13 USD 300,000 386,820 FY-22 2022.04.21 2027.04.21 3.63 USD 300,000 386,820 FY-22 2022.05.06 2025.05.06 3.60 USD 500,000 644,700 FY-22 2022.06.14 2025.06.14~2027.06.14 3.63~4.00 USD 800,000 1,031,520 FY-22 2022.06.28 2025.06.28 4.13 USD 300,000 386,820 FY-22 2022.07.27 2027.07.27 4.25 USD 700,000 902,580 FY-22 2022.10.06 2026.04.06~2028.04.06 5.38~5.50 USD 800,000 1,031,520 FY-22 2022.10.06~2022.11.01 2032.10.06 5.16 HKD 2,350,000 387,891 FY-23 2023.06.07 2030.06.07 4.51 HKD 1,037,000 171,167 FY-23 2023.07.12 2028.07.12 4.88 USD 350,000 451,290 FY-23 2023.07.18 2028.07.18 5.00 USD 500,000 644,700 FY-23 2023.07.31 2026.07.31 5.38 USD 1,000,000 1,289,400 FY-23 2023.09.21 2026.09.21 5.38 USD 300,000 386,820 16,316,069 Less: D (128,259 ) Add: Premium on foreign debt securities 263 Less: C (1,539,855 ) Add: C 2,464 Less: C premium (263 ) ￦ 14,650,419
Schedule of Changes in Borrowings and Debt Securities	(7) Changes in borrowings and debt securities for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 80,529,513 120,605,365 Cash flow 39,193,816 12,692,924 Effect of exchange rate fluctuations 906,877 335,353 Others (24,841 ) (1,812 ) Ending balance ￦ 120,605,365 133,631,830

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2023
Presentation of leases for lessee [abstract]
Summary of Right-of-Use Assets	(2) Right-of-use 2022 Acquisition cost Accumulated depreciation Book value In millions of won Land ￦ 886,076 (224,277 ) 661,799 Buildings 135,290 (60,434 ) 74,856 Structures 30,879 (6,914 ) 23,965 Machinery 1,737 (902 ) 835 Ships 4,151,460 (1,554,597 ) 2,596,863 Vehicles 35,712 (20,996 ) 14,716 Others (*) 751,570 (413,479 ) 338,091 ￦   5,992,724   (2,281,599 )   3,711,125 (*) Including a power purchase agreement (“PPA”) with CGN Yulchon Generation Co., Ltd. 2023 Acquisition cost Accumulated depreciation Book value In millions of won Land ￦ 937,481 (281,621 ) 655,860 Buildings 188,017 (97,444 ) 90,573 Structures 46,573 (9,217 ) 37,356 Machinery 26,453 (20,510 ) 5,943 Ships 4,137,168 (1,823,863 ) 2,313,305 Vehicles 59,208 (33,717 ) 25,491 Others (*) 646,894 (411,679 ) 235,215 ￦ 6,041,794 (2,678,051 ) 3,363,743 (*) Including a power purchase agreement (“PPA”) with CGN Yulchon Generation Co., Ltd.
Summary of Changes in Right-of-Use Assets	(3) Changes in right-of-use 2022 Beginning Increase Depreciation Decrease Others Ending In millions of won Land ￦ 652,795 63,654 (41,260 ) —  (13,390 ) 661,799 Buildings 62,884 42,399 (30,243 ) (1,042 ) 858 74,856 Structures 21,148 4,256 (1,758 ) —  319 23,965 Machinery 565 429 (159 ) —  —  835 Ships 3,029,219 —  (393,677 ) —  (38,679 ) 2,596,863 Vehicles 13,618 13,475 (8,673 ) (962 ) (2,742 ) 14,716 Others 279,168 72,803 (33,298 ) (834 ) 20,252 338,091 ￦ 4,059,397    197,016    (509,068 )     (2,838 )     (33,382 )  3,711,125 2023 Beginning Increase Depreciation Decrease Others Ending In millions of won Land ￦ 661,799 2,696 (57,461 ) (126 ) 48,952 655,860 Buildings 74,856 24,622 (32,591 ) (904 ) 24,590 90,573 Structures 23,965 49 (2,471 ) (273 ) 16,086 37,356 Machinery 835 —  (94 ) —  5,202 5,943 Ships 2,596,863 199,538 (382,298 ) —  (100,798 ) 2,313,305 Vehicles 14,716 21,097 (10,464 ) (1,008 ) 1,150 25,491 Others 338,091 13,860 (51,138 ) (302 ) (65,296 ) 235,215 ￦ 3,711,125    261,862    (536,517 )     (2,613 )     (70,114 )  3,363,743
Summary of Lease liabilities	(4) Lease liabilities as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Less than 1 year ￦ 639,756 641,525 1 ~ 5 years 2,047,584 1,898,846 More than 5 years 1,925,012 1,694,729 4,612,352 4,235,100 Less: Discount (449,209 ) (427,220 ) Present value of lease payment ￦ 4,163,143 3,807,880
Summary of Liquidity Classification of Lease Liabilities	(5) The details of the liquidity classification of lease liabilities as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Current lease liabilities ￦ 614,037 612,765 Non-current 3,549,106 3,195,115 ￦ 4,163,143 3,807,880
Summary of Changes in lease liabilities	(6) Changes in lease liabilities for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Increase Decrease Interest Others(*) Ending In millions of won Lease liabilities ￦   4,410,503      109,019     (654,236 )       91,590     206,267  4,163,143 (*) Including translation effect of foreign currency lease liabilities and others. 2023 Beginning Increase Decrease Interest Others(*) Ending In millions of won Lease liabilities ￦   4,163,143 253,495 (661,665 ) 87,426 (34,519 ) 3,807,880 (*) Including translation effect of foreign currency lease liabilities and others.
Summary of Details of Expense Relating to Lease Contracts As Lessee	(7) Details of expense relating to lease contracts as lessee for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Depreciation of right-of-use ￦ 509,068 536,517 Interest expenses of lease liabilities 91,590 87,426 Leases expenses for short-term leases 235,473 172,711 Leases expenses for leases of low-value 3,147 4,659 Variable lease payments 112,158 62,006 ￦   951,436   863,319
Summary of Profit and Loss Related To Finance Lease	(2) Profit and loss related to finance lease for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Finance income on the net investment in the lease ￦   122,355     118,695
Summary of Maturity Analysis of Finance Lease Payments Receivable	(3) Maturity analysis of the lease payments receivable and reconciliation of the undiscounted lease payments to the net investment in the lease as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Less than 1 year ￦ 181,930 189,779 1 ~ 2 years 169,693 182,743 2 ~ 3 years 166,787 179,428 3 ~ 4 years 166,196 178,074 4 ~ 5 years 166,965 168,221 More than 5 years 1,527,093 1,408,350 2,378,664 2,306,595 Less: Unearned finance income (1,139,274 ) (1,057,434 ) Net investment in the lease (*) ￦  1,239,390 1,249,161 (*) Including the present value of unguaranteed residual value amounting to ￦22,910 million and ￦25,521 million, as of December 31, 2022 and 2023, respectively.
Summary of Changes in Allowance For Doubtful Accounts of Finance Lease Receivables	(4) Changes in the allowance for doubtful accounts of finance lease receivables for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦      768 4,505 Bad debt expense 3,737 751 Ending balance ￦ 4,505 5,256

Employment Benefits (Tables)

Employment Benefits (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of information about defined benefit plans [abstract]
Summary of Employment Benefits	(1) Employment benefit obligations as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Net defined benefit asset ￦ 198,626 70,187 Net defined benefit obligations 825,927 1,033,409 Other long-term employee benefit obligations 2,794 1,911
Summary of Principal Assumptions on Actuarial Valuation	(2) Principal assumptions used for actuarial valuation as of December 31, 2022 and 2023 are as follows: 2022 2023 Discount rate 5.16%~5.19% 4.06%~5.44% Future salary and benefit levels 4.55% 4.82% Weighted average duration 8.84 years 9.52 years
Summary of Expense Relating to defined Benefit Plans	(3) Details of expense relating to defined benefit plans for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Current service cost ￦ 524,942 496,722 373,802 Interest cost 91,877 116,256 190,257 Expected return on plan assets (52,782 ) (73,484 ) (163,074 ) Past service cost 5,483 125 —  ￦ 569,520 539,619 400,985 Expenses described above are recognized in those items below in the consolidated financial statements. 2021 2022 2023 In millions of won Cost of sales ￦ 416,287 404,243 285,209 Selling and administrative expenses 95,983 81,457 73,521 Others (Construction-in-progress 57,250 53,919 42,255 ￦ 569,520 539,619 400,985
Summary of Defined Benefits	(4) Details of defined benefit obligations as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Present value of defined benefit obligation from funded plans ￦ 3,776,715 4,312,702 Fair value of plan assets (3,149,414 ) (3,349,480 ) Net liabilities incurred from defined benefit plans ￦ 627,301  963,222
Summary of Changes in the Present Value of Defined Benefits	(5) Changes in the present value of defined benefit obligations for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 4,564,417 3,776,715 Current service cost 496,722 373,802 Interest cost 116,256 190,257 Remeasurement component (1,012,727 ) 409,635 Past service cost 125 —  Actual payments (388,105 ) (437,734 ) Others 27 27 Ending balance ￦  3,776,715  4,312,702
Summary of Changes in the Fair Value of Plan Assets	(6) Changes in the fair value of plan assets for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 2,909,547 3,149,414 Expected return 73,484 163,074 Remeasurement component (11,609 ) 4,777 Contributions by the employers 347,778 188,566 Actual payments (169,786 ) (156,351 ) Ending balance ￦  3,149,414  3,349,480
Summary of the Fair Value of Plan Assets	(7) Details of the fair value of plan assets as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Equity instruments ￦ 171,301 5,326 Debt instruments 854,640 697,907 Bank deposits 590,103 611,821 Others(*) 1,533,370   2,034,426 ￦    3,149,414  3,349,480 (*) ‘Others’ consist of various financial assets managed by external asset management companies.
Summary of Remeasurement Components Recognized in Other Comprehensive Income (loss)	(8) Remeasurement components recognized in other comprehensive income (loss) for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Actuarial gain from changes in financial assumptions ￦ (967,366 ) 429,810 Experience adjustments, etc. (45,361 ) (20,175 ) Expected return 11,609 (4,777 ) ￦   (1,001,118 )  404,858

Provisions (Tables)

Provisions (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of other provisions [abstract]
Summary of Provisions	(1) Provisions as of December 31, 2022 and 2023 are as follows: 2022 2023 Current Non-current Current Non-current In millions of won Employment benefits Provisions for employment benefits ￦ 1,045,058 —  999,691 —  Litigation Litigation provisions 26,974 154,205 5,299 171,719 Decommissioning cost Nuclear plants —  23,035,427 81,684 21,565,203 Spent fuel 415,890 1,011,028 940,585 1,985,149 Radioactive waste 94,158 1,895,849 67,572 1,840,513 PCBs —  88,359 —  57,944 Other recovery provisions —  32,770 —  36,082 Others Power plant regional support program 144,504 —  130,034 —  Transmission regional support program 239,235 —  256,006 —  Provisions for financial guarantee 22,895 44,345 25,534 24,458 Provisions for RPS 24,339 —  36,074 —  Provisions for greenhouse gas emissions obligations 298,876 —  18,672 —  Others 115,122 102,659 92,974 199,976 ￦ 2,427,051 26,364,642 2,654,125 25,881,044
Changes in Provisions	(2) Changes in provisions for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Increase Payment Reversal Others Ending balance In millions of won Employment benefits Provisions for employment benefits ￦ 1,048,939 997,281 (1,001,283 ) —  121 1,045,058 Litigation Litigation provisions 114,718 112,797 (39,633 ) (6,360 ) (343 ) 181,179 Decommissioning cost Nuclear plants 19,461,461 3,630,830 (56,813 ) —  (51 ) 23,035,427 Spent fuel 1,350,662 493,943 (417,687 ) —  —  1,426,918 Radioactive waste 1,832,535 221,629 (64,157 ) —  —  1,990,007 PCBs 103,665 1,949 (17,156 ) (99 ) —  88,359 Other recovery provisions 30,231 2,093 (165 ) (751 ) 1,362 32,770 Others Power plant regional support program 146,588 52,470 (54,554 ) —  —  144,504 Transmission regional support program 250,288 176,424 (187,477 ) —  —  239,235 Provisions for financial guarantee 80,841 4,738 (17,789 ) —  (550 ) 67,240 Provisions for RPS —  587,586 (556,993 ) (6,254 ) —  24,339 Provisions for greenhouse gas emissions obligations 655,544 387,299 (590,172 ) (33,596 ) (120,199 ) 298,876 Others 271,828 4,447 (39,566 )  (19,853 ) 925 217,781 ￦ 25,347,300 6,673,486 (3,043,445 ) (66,913 ) (118,735 ) 28,791,693 2023 Beginning Increase in Payment Reversal Others Ending balance In millions of won Employment benefits Provisions for employment benefits ￦ 1,045,058 834,102 (877,933 ) (1,536 ) —  999,691 Litigation Litigation provisions 181,179 151,189 (67,478 ) (87,872 ) —  177,018 Decommissioning cost Nuclear plants 23,035,427 572,379 (62,035 ) (1,898,935 ) 51 21,646,887 Spent fuel 1,426,918 1,877,827 (379,011 ) —  —  2,925,734 Radioactive waste 1,990,007 89,054 (86,823 ) (84,153 ) —  1,908,085 PCBs 88,359 1,699 (17,100 ) (15,014 ) —  57,944 Other recovery provisions 32,770 1,319 (432 ) —  2,425 36,082 Others Power plant regional support program 144,504 51,814 (66,284 ) —  —  130,034 Transmission regional support program 239,235 177,520 (160,749 ) —  —  256,006 Provisions for financial guarantee 67,240 10,215 (25,174 ) (2,251 ) (38 ) 49,992 Provisions for RPS 24,339 620,855 (609,120 ) —  —  36,074 Provisions for greenhouse gas emissions obligations 298,876 77,207 (298,859 ) (58,552 ) —  18,672 Others 217,781 181,756 (101,601 ) (3,816 ) (1,170 ) 292,950 ￦ 28,791,693 4,646,936 (2,752,599 ) (2,152,129 ) 1,268 28,535,169
Summary of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government	(3) Greenhouse gas emissions rights and obligations: (i) Allowances received free of charge from the government for each planned period as of December 31, 2023 are as follows: 3rd planned period 2021 2022 2023 2024 2025 Total In ten thousands of tons(tCO2-eq) Allowances received free of charge —  14,696 14,776 10,603 10,603 50,678
Summary of Changes in Greenhouse Gas Emissions Rights	(ii) Changes in greenhouse gas emissions rights for the years ended December 31, 2022 and 2023 are as follows: 2022 3rd planned period 2021 2022 2023 2024 2025 Total Quantity Amount Quantity Amount Quantity Amount Quantity Amount Quantity Amount Quantity Amount In ten thousands tons(tCO2-eq), Beginning (*) 16,433 524,658 14,942 62,735 11,166 8,529 3,671 —  3,696 6,873 49,908 602,795 Purchase (Sell) 1,191 267,433 1,343 272,824 32 6,315 35 7,185 —  —  2,601 553,757 Government submission (17,602 ) (580,807 ) (838 ) (173,145 ) —  245 —  —  —  —  (18,440 ) (753,707 ) Borrowing (carryforward) (22 ) (3,298 ) 286 45,847 48 12,225 22 5,699 —  —  334 60,473 Others —  (207,986 ) —  (16,256 ) —  (8,529 ) —  —  —  5,419 —  (227,352 ) Ending —  —  15,733 192,005 11,246 18,785 3,728 12,884 3,696 12,292 34,403 235,966 (*) Changes such as additional allowances or cancellation of allowances are reflected. 2023 3rd planned period 2022 2023 2024 2025 Total Quantity Amount Quantity Amount Quantity Amount Quantity Amount Quantity Amount In ten thousands tons(tCO2-eq), Beginning (*) 14,704 192,005 14,204 18,785 8,088 12,884 8,065 12,292 45,061 235,966 Purchase (Sell) 1,315 135,040 707 67,506 73 14,839 —  —  2,095 217,385 Government Submission (15,972 ) (302,918 ) (484 ) (39,837 ) —  —  —  —  (16,456 ) (342,755 ) Carry Forward (Borrowing) (45 ) (24,127 ) (231 ) (28,266 ) 568 79,430 —  —  292 27,037 Reclassification (2 ) —  —  6,940 —  (7, —  (5,419 ) (2 ) (5,664 ) Ending —  —  14,196 25,128 8,729 99,968 8,065 6,873 30,990 131,969 (*) Changes such as additional allowances or cancellation of allowances are reflected. (iii) The Company does not have greenhouse gas emissions rights pledged as collateral as of December 31, 2023. (iv) The Company does not hold any greenhouse gas emissions rights prepared for generating a profit from short-term fluctuations in price as of December 31, 2023. (v) Estimated greenhouse gas emission of the Company for the year ended December 31, 2023 is 14,941 ten thousand tons.

Government Grants (Tables)

Government Grants (Tables)	12 Months Ended
	Dec. 31, 2023
Government grants [Abstract]
Summary of Government Grants	(1) Government grants as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Land ￦ (27,405 ) (27,404 ) Buildings (50,437 ) (46,227 ) Structures (165,608 ) (157,881 ) Machinery (127,126 ) (119,824 ) Vehicles (2,045 ) (2,837 ) Equipment (6,608 ) (5,932 ) Tools (99 ) (62 ) Construction-in-progress (135,926 ) (173,474 ) Investment properties (21 ) (22 ) Software (174 ) (413 ) Development expenditures (3,477 ) (2,121 ) Intangible assets under development (2,108 ) (2,458 ) Other intangible assets (67 ) (322 ) ￦ (521,101 ) (538,977 )
Summary of Changes in Government Grants	(2) Changes in government grants for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning balance Receipt Acquisition Offset the items of depreciation expense and others Disposal Others Ending balance In millions of won Cash ￦ —  (50,755 ) —  —  —  50,755 —  Land (23,474 ) —  —  —  1 (3,932 ) (27,405 ) Buildings (52,122 ) —  —  5,360 —  (3,675 ) (50,437 ) Structures (172,021 ) —  —  9,568 1,250 (4,405 ) (165,608 ) Machinery (140,082 ) —  —  17,283 405 (4,732 ) (127,126 ) Vehicles (1,675 ) —  —  663 —  (1,033 ) (2,045 ) Equipment (149 ) —  —  494 —  (6,953 ) (6,608 ) Tools (64 ) —  —  32 —  (67 ) (99 ) Construction-in-progress (111,822 ) —  23,155 —  17 (47,276 ) (135,926 ) Investment properties (30 ) —  —  1 —  8 (21 ) Software (91 ) —  —  60 —  (143 ) (174 ) Development expenditures (3,820 ) —  —  1,466 —  (1,123 ) (3,477 ) Intangible assets under development (7,326 ) —  —  —  —  5,218 (2,108 ) Other intangible assets (71 ) —  —  4 —  —  (67 ) ￦ (512,747 )  (50,755 )  23,155  34,931  1,673  (17,358 ) (521,101 ) 2023 Beginning Receipt Acquisition Offset the Disposal Others Ending In millions of won Cash ￦ —  (57,207 ) —  —  —  57,207 —  Land (27,405 ) —  —  —  1 —  (27,404 ) Buildings (50,437 ) —  —  5,070 —  (860 ) (46,227 ) Structures (165,608 ) —  —  9,562 1,611 (3,446 ) (157,881 ) Machinery (127,126 ) —  —  17,413 1,230 (11,341 ) (119,824 ) Vehicles (2,045 ) —  —  960 —  (1,752 ) (2,837 ) Equipment (6,608 ) —  —  2,011 —  (1,335 ) (5,932 ) Tools (99 ) —  —  38 —  (1 ) (62 ) Construction-in-progress (135,926 ) —  5,544 —  —  (43,092 ) (173,474 ) Investment properties (21 ) —  —  1 —  (2 ) (22 ) Software (174 ) —  —  85 —  (324 ) (413 ) Development expenditures (3,477 ) —  —  1,356 —  —  (2,121 ) Intangible assets under development (2,108 ) —  —  —  —  (350 ) (2,458 ) Other intangible assets (67 ) —  —  93 —  (348 ) (322 ) ￦ (521,101 ) (57,207 ) 5,544 36,589 2,842 (5,644 ) (538,977 )
Summary of Changes in Government Grants for Specific Business Projects	(3) Changes in government grants for specific business projects for the years ended December 31, 2022 and 2023 are as follows: 2022 Department Business Description Period Budget Beginning Received Interest Used Return Others Ending In millions of won Ministry of Trade, Industry and Energy Temporary electricity bill support for small business owners Temporary electricity bill support for small business owners 2021.04.01 ~ 2022.06.30 211,235 17,735 71,685 —  (88,300 ) —  —  1,120 Ministry of Trade, Industry and Energy 2021 project to support the supply of open electric vehicle charging station 2021 project to support the supply of open electric vehicle charging station 2021.01.01 ~ 2022.05.31 40,100 —  11,796 —  (11,796 ) —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Newly Electricity Supply Construction Fees) 2022 Electricity supply business in rural areas (Newly Electricity Supply Construction Fees) 2022.01.01 ~ 2023.01.31 149 —  151 —  (151 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Reservation of Financial Loans) 2022 Electricity supply business in rural areas (Reservation of Financial Loans) 2022.01.01 ~ 2023.01.31 166 —  166 —  (166 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Support for operational deficits of electricity providers) 2022 Electricity supply business in rural areas (Support for operational deficits of electricity providers) 2023.01.31 ~ 2022.01.31 166,732 —  158,669 —  (158,669 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Technical support for local governments and residents) 2022 Electricity supply business in rural areas (Technical support for local governments and residents) 2022.01.01 ~ 2023.01.31 1,028 —  268 —  (268 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Electricity supply business in rural areas (Support for Losses in Local Government Operations) 2022 Electricity supply business in rural areas (Support for Losses in Local Government Operations) 2022.01.01 ~ 2023.01.31 10,078 —  11,071 —  (11,071 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Establishment of eco-friendly microgrid in island areas 2022 Establishment of eco-friendly microgrid in island areas 2022.01.01 ~ 2023.01.31 7,742 —  14,113 —  (14,113 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Operating expenses for regional projects around the power plant 2022 Operating expenses for regional projects around the power plant 2022.01.01 ~ 2022.12.31 387 —  63 —  (63 ) —  —  —  Ministry of Trade, Industry and Energy 2022 Renewable Energy Generation Difference Support 2022 Renewable Energy Generation Difference Support 2022.01.01 ~ 2022.12.31 98,656 —  81,739 —  (81,739 ) —  —  —  Ministry of Trade, Industry and Energy Safety inspection of general electrical equipment Safety inspection of general electrical equipment 2022.01.01 ~ 2022.12.31 2,122 —  2,117 —  (2,117 ) —  —  —  Ministry of Trade, Industry and Energy Establishment of Integrated Control System for Renewable Energy in the transmission and substation sector Establishment of Integrated Control System for Renewable Energy in the transmission and substation sector 2021.01.01 ~ 2022.08.31 940 —  463 —  (463 ) —  —  —  Ministry of Trade, Industry and Energy Establishment of Integrated Control System for Renewable Energy in the power distribution sector Establishment of Integrated Control System for Renewable Energy in the power distribution sector 2021.01.01 ~ 2022.08.31 5,060 —  5,027 —  (5,027 ) —  —  —  Ministry of Employment and Labor Support for replacement of teaching materials at workplace daycare centers Support for replacement of teaching materials at workplace daycare centers 2022.01.01 ~ 2022.01.07 48 —  29 —  (29 ) —  —  —  2023 Department Business Description Period Budget Beginning Received interest Used Return Others Ending In millions of won Ministry of Trade, Industry and Energy Temporary electricity bill support for small business owners Temporary electricity bill support for small business owners 2021.04.01 ~ 2022.06.30 211,235 1,120 —  —  (51 ) —  —  1,069 Ministry of Trade, Industry and Energy Construction of the Integrated Control System for Renewable Energy in Transmission Area Construction of the Integrated Control System for Renewable Energy in Transmission Area 2022.01.01 ~ 2023.09.30 940 —  798 —  (798 ) —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Newly Electricity Supply Contribution Fees) Electricity supply business in rural areas (Newly Electricity Supply Contribution Fees) 2023.01.01 ~ 2024.01.31 2 —  35 —  (35 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Reservation of Financial Loans) Electricity supply business in rural areas (Reservation of Financial Loans) 2023.01.01 ~ 2024.01.31 166 —  166 —  (166 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Support for operational deficits of electricity providers) Electricity supply business in rural areas (Support for operational deficits of electricity providers) 2023.01.01 ~ 2024.01.31 158,275 —  149,259 —  (149,259 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Technical support for local governments and residents) Electricity supply business in rural areas (Technical support for local governments and residents) 2023.01.01 ~ 2024.01.31 1,176 —  1,862 —  (1,862 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Electricity supply business in rural areas (Support for Losses in Local Government Operations) Electricity supply business in rural areas (Support for Losses in Local Government Operations) 2023.01.01 ~ 2024.01.31 12,036 —  8,619 —  (8,619 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Establishment of eco-friendly microgrid in island areas Establishment of eco-friendly microgrid in island areas 2023.01.01 ~ 2024.01.31 3,871 —  26,091 —  (26,091 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Operating expenses for regional projects around the power plant Operating expenses for regional projects around the power plant 2023.01.01 ~ 2023.12.31 361 —  51 —  (51 ) —  —  —  Ministry of Trade, Industry and Energy 2023 Renewable Energy Generation Difference Support Renewable Energy Generation Difference Support 2023.01.01 ~ 2023.12.31 78,311 —  69,599 —  (69,599 ) —  —  —  Energy Cashback Energy Cashback Ministry of Trade, Industry and Energy Safety inspection of general electrical equipment Safety inspection of general electrical equipment 2023.01.01 ~ 2023.12.31 2,560 —  2,560 —  (2,560 ) —  —  —  Ministry of Trade, Industry and Energy Establishment of Integrated Control System for Renewable Energy in the power distribution sector Establishment of Integrated Control System for Renewable Energy in the power distribution sector 2023.01.01 ~ 2023.04.18 495 —  635 —  (635 ) —  —  —  Ministry of Trade, Industry and Energy Support for the installation of workplace daycare centers Support for the installation of workplace daycare centers 2023.01.01 ~ 2023.12.31 2,510 —  680 2 (680 ) (1,832 ) 1,832 2 Ministry of Employment and Labor Support for replacement of teaching materials at workplace daycare centers Support for replacement of teaching materials at workplace daycare centers 2023.01.01 ~ 2023.12.31 1,490 —  270 —  (270 ) —  —  —

Deferred Revenues (Tables)

Deferred Revenues (Tables)	12 Months Ended
	Dec. 31, 2023
Deferred income including contract liabilities [abstract]
Deferred Revenues	Deferred revenue for the years ended December 31, 2022 and 2023 are as follows which included in current and non-current non-financial 2022 2023 In millions of won Beginning balance ￦ 10,356,555 10,974,845 Increase 1,330,129 1,317,061 Recognized as revenue (711,839 ) (743,051 ) Ending balance ￦ 10,974,845 11,548,855

Non-financial Liabilities (Tabl

Non-financial Liabilities (Tables)	12 Months Ended
	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Non-financial Liabilities	Non-financial 2022 2023 Current Non-current Current Non-current In millions of won Advance received ￦ 4,544,206 284,618 5,204,113 288,686 Unearned revenue 86,584 7,200 36,716 12,108 Deferred revenue 702,430 10,272,415 734,825 10,814,030 Withholdings 207,217 2,408 259,755 2,369 Others 1,433,940 96,020 1,646,254 78,807 ￦ 6,974,377 10,662,661 7,881,663 11,196,000

Contributed Capital (Tables)

Contributed Capital (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of classes of share capital [abstract]
Summary of Details Shares Issued	(1) Details of shares issued as of December 31, 2022 and 2023 are as follows: 2022 Shares authorized Shares issued Par value per share (in won) Owned by government(*) Owned by others Total In millions of won except share information Common shares 1,200,000,000 641,964,077 ￦ 5,000 1,640,385 1,569,435 3,209,820 (*) Korea Development Bank’s interest of ￦1,056,176 million is included. 2023 Shares authorized Shares issued Par value per share (in won) Owned by government(*) Owned by others Total In millions of won except share information Common shares 1,200,000,000 641,964,077 ￦ 5,000 1,640,385 1,569,435 3,209,820 (*) Korea Development Bank’s interest of ￦1,056,176 million is included.
Summary of Details in Number of Outstanding Capital Stock	(2) Details in number of outstanding capital stock for the years ended December 31, 2022 and 2023 are as follows. 2022 2023 Number of shares Beginning balance 641,964,077 641,964,077 Ending balance   641,964,077   641,964,077
Summary of Share Premium	(3) Details of share premium as of December 31, 2022 and 2023 are as follows:  2022 2023 In millions of won Share premium ￦    843,758       843,758

Retained Earnings and Dividen_2

Retained Earnings and Dividends Paid (Tables)	12 Months Ended
	Dec. 31, 2023
Retained earnings [abstract]
Summary of Retained Earnings	(1) Details of retained earnings as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Legal reserve (*) ￦ 1,604,910 1,604,910 Voluntary reserves  27,782,969 2,812,313 Retained earnings (Undisposed deficit) before appropriations (7,956,579 ) 11,921,039 Retained earnings ￦ 21,431,300 16,338,262 (*) The KEPCO Act requires KEPCO to appropriate a legal reserve equal to at least 20 paid-in
Voluntary Reserves	(2) Details of voluntary reserves as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Reserve for investment on social overhead capital ￦ 5,277,449 2,272,313 Reserve for research and human development (*) 330,000 330,000 Reserve for business expansion  21,965,520   —  Reserve for equalizing dividends 210,000 210,000 ￦ 27,782,969 2,812,313 (*) The reserve for research and human development is appropriated by KEPCO to use as qualified tax credits to reduce corporate tax liabilities. The reserve is available for cash dividends for a certain period as defined by the Restriction of Special Taxation Act of Korea.
Summary of Changes in Retained Earnings	(3) Changes in retained earnings for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 45,258,244 21,431,300 Loss for the year attributed to owners of the controlling company (24,466,853 ) (4,822,549 ) Changes in equity method retained earnings 12,305 (27,349 ) Remeasurements of defined benefit liability, net of tax 626,769 (242,987 ) Others —  (153 ) Additional paid-in 835 —  Ending balance ￦  21,431,300 16,338,262
Summary of Dividends Paid	(4) Dividends paid for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 In millions of won Number of shares issued Number of treasury stocks Number of shares eligible for dividends Dividends paid per share Dividends paid (In won) Common shares 641,964,077 —  641,964,077 ￦ 1,216 780,628 2022 In millions of won Number of shares issued Number of treasury stocks Number of shares eligible for dividends Dividends paid per share Dividends paid (In won) Common shares 641,964,077 —  641,964,077 ￦   —    —  2023 In millions of won Number of shares issued Number of treasury stocks Number of shares eligible for dividends Dividends paid per share Dividends paid (In won) Common shares 641,964,077 —  641,964,077 ￦   —    —
Changes in Retained Earnings of Investments in Associates And Joint Ventures	(5) Changes in retained earnings of investments in associates and joint ventures for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦        3,970     16,275 Changes 12,305 (27,349 ) Ending balance ￦ 16,275   (11,074 )
Summary of Changes in Reserve of Remeasurement	(6) Changes in remeasurement components related to defined benefit liability for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Beginning balance ￦ 98,844 614,805 Changes    964,791 (376,121 ) Income tax effect (338,022 ) 133,134 Transfer to reserve for business expansion (110,808 ) (342,589 ) Ending balance ￦ 614,805 29,229

Statements of Appropriation o_2

Statements of Appropriation of Retained Earnings (Disposition of Deficit) (Tables)	12 Months Ended
	Dec. 31, 2023
Statement of Appropriation of Retained Earnings [Abstract]
Statements of Appropriation of Retained Earnings (Disposition of Deficit)	Statements of disposition of deficit of KEPCO, the controlling company, for the years ended December 31, 2022 and 2023, respectively, are as follows: 2022 2023 In millions of won except for I.   Deficit before disposition Undisposed deficit carried over from prior years ￦ —  —  Net loss (25,297,713 ) (3,249,233 ) Remeasurement of the defined benefit plan     327,056 (149,474 ) (24,970,657 ) (3,398,707 ) II. Transfer from voluntary reserves 24,970,657 2,812,314 III.  Subtotal (I+II) —  (586,393 ) IV.  Disposition of deficit — 586,393 V. Undisposed deficit to be carried over forward to subsequent year —  —

Hybrid Bonds (Tables)

Hybrid Bonds (Tables)	12 Months Ended
	Dec. 31, 2023
Hybrid Bonds [Abstract]
Hybrid Bonds	Hybrid bonds classified as equity (non-controlling Issuer Hybrid bond Issued date Maturity Yield (%) 2022 2023 In millions of won Korea South-East Power Co., Ltd. (*) 2nd hybrid bond 2012.12.07 2042.12.06 4.44 ￦ 230,000 230,000 Expense of issuance (627 ) (627 ) ￦ 229,373 229,373 (*) Bondholders may not require prepayment in any case, and the Company has a call option to repay all of these bonds on or after 12 years from the date of issuance of the bonds, or on each interest payment date henceforth. In addition, there is a step-up

Other Components of Equity (Tab

Other Components of Equity (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of reserves within equity [abstract]
Summary of Other Components of Equity	(1) Other components of equity of the parent as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Other capital surplus ￦ 1,268,569 1,600,801 Accumulated other comprehensive income 496,976 557,430 Other equity 13,294,973 13,294,972 ￦ 15,060,518 15,453,203
Summary of Changes in Other Capital Surplus	(2) Changes in other capital surplus for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 Gains on treasury stocks Others Subtotal Gains on disposal of treasury stocks Others Subtotal In millions of won Beginning balance ￦ 387,524 843,585 1,231,109 387,524 881,045 1,268,569 Changes in consolidation scope —  (597 ) (597 ) —  (48 ) (48 ) Additional paid-in —  39,641 39,641 —  —  —  Transactions between consolidated entities —  (1,584 ) (1,584 ) —  332,280 332,280 Ending balance ￦ 387,524 881,045 1,268,569 387,524 1,213,277 1,600,801
Summary of Changes in Accumulated Other Comprehensive Income (Loss)	(3) Changes in accumulated other comprehensive income (loss) for the years ended December 31, 2022 and 2023 are as follows: 2022 Financial assets at fair value through other comprehensive income valuation reserve Shares in other comprehensive income of investments in associates and Reserve for overseas operations translation credit Reserve for gain (loss) on valuation of derivatives Total In millions of won Beginning balance ￦ (46,498 ) 311,252 (325,170 ) 2,784 (57,632 ) Changes in the unrealized fair value of financial assets at FVOCI, net of tax 58,008 —  —  —  58,008 Shares of —  509,487 —  —  509,487 Foreign currency translation of foreign operations, net of tax —  —  19,550 —  19,550 Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax —  —  —  (32,437 ) (32,437 ) Ending balance ￦ 11,510 820,739 (305,620 ) (29,653 ) 496,976 2023 Financial assets at fair value through other comprehensive income valuation reserve Shares in other comprehensive income of investments in associates and Reserve for overseas operations translation credit Reserve for gain (loss) on derivatives Total In millions of won Beginning balance ￦ 11,510 820,739 (305,620 ) (29,653 ) 496,976 Changes in the unrealized fair value of financial assets at FVOCI, net of tax (31,665 ) —  —  —  (31,665 ) Shares in other comprehensive income of associates and joint ventures, net of tax —  122,994 —  —  122,994 Foreign currency translation of foreign operations, net of tax —  —  (25,950 ) —  (25,950 ) Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax —  —  —  (5,078 ) (5,078 ) Others 153 —  —  —  153 Ending balance ￦ (20,002 ) 943,733 (331,570 ) (34,731 ) 557,430
Summary of Changes in Other equity	(4) Other equity as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Statutory revaluation reserve ￦ 13,295,098 13,295,098 Changes in other equity (125 ) (126 ) ￦ 13,294,973 13,294,972

Sales (Tables)

Sales (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue [abstract]
Summary of Sales	Details of sales for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 Domestic Overseas Domestic Overseas Domestic Overseas In millions of won [Type of goods and services] Sales of goods ￦ 58,359,774 441,203 68,578,390 606,079 85,588,151 351,986 Electricity 57,308,555 —  66,198,964 —  82,954,778 —  Heat supply 232,738 —  489,629 —  440,435 —  Others 818,481 441,203 1,889,797 606,079 2,192,938 351,986 Sales related to rendering of services 252,216 204,184 370,799 343,803 467,661 283,217 Sales related to construction services 159,262 595,736 193,541 453,412 186,996 598,399 ￦ 58,771,252 1,241,123 69,142,730 1,403,294 86,242,808 1,233,602 [Timing of revenue recognition] Performance obligations satisfied at a point in time ￦ 58,359,774 441,203 68,578,390 606,079 85,588,151 351,986 Performance obligations satisfied over time 411,478 799,920 564,340 797,215 654,657 881,616 ￦ 58,771,252 1,241,123 69,142,730 1,403,294 86,242,808 1,233,602

Selling and Administrative Ex_2

Selling and Administrative Expenses (Tables)	12 Months Ended
	Dec. 31, 2023
Selling, general and administrative expense [abstract]
Summary of Selling and Administrative Expenses	(1) Selling and administrative expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Salaries ￦ 1,121,188 1,142,360 1,098,460 Retirement benefit expense 113,127 109,758 89,533 Welfare and benefit expense 155,558 155,781 152,836 Insurance expense 17,909 20,835 27,726 Depreciation 219,427 244,676 241,533 Amortization of intangible assets 91,428 85,661 88,648 Bad debt expense 17,968 23,634 62,808 Commission 410,287 420,390 460,644 Advertising expense 29,230 33,739 30,305 Training expense 4,923 7,327 7,900 Vehicle maintenance expense 8,849 10,749 9,044 Publishing expense 3,568 3,732 3,281 Business promotion expense 3,522 3,198 2,559 Rent expense 43,650 47,680 44,807 Telecommunication expense 8,569 7,945 7,813 Transportation expense 870 1,012 1,099 Taxes and dues 93,446 122,177 112,449 Expendable supplies expense 9,052 9,617 7,252 Water, light and heating expense 12,351 17,950 16,207 Repairs and maintenance expense 123,134 152,449 154,062 Ordinary development expense 213,936 213,932 217,319 Travel expense 11,099 16,062 16,265 Clothing expense 10,540 13,044 10,450 Survey and analysis expense 889 1,126 1,068 Membership fee 1,331 1,469 1,503 Others 149,945 143,119 196,011 ￦ 2,875,796 3,009,422 3,061,582
Summary of Other Selling and Administrative Expenses	(2) Details of “others” included in selling and administrative expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Accommodation development expenses ￦ 57,815 56,038 49,988 Miscellaneous wages 47,221 31,910 97,474 Litigation and filing expenses 16,383 14,876 19,204 Compensation for damages 3,303 3,116 4,300 Outsourcing expenses 3,799 3,635 3,511 Reward expenses 3,006 2,740 2,770 Overseas market development expenses 1,192 1,376 1,503 Others 17,226 29,428 17,261 ￦   149,945   143,119 196,011

Other Income and Expenses (Tabl

Other Income and Expenses (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of other operating income (expense) [Abstract]
Summary of Other Income	(1) Other income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Reversal of other provisions ￦ 15,548 15,265 79,001 Reversal of other allowance for doubtful accounts 98 37 1,941 Gains on government grants 458 301 239 Gains on assets contributed 9,347 1,953 24,183 Gains on liabilities exempted 1,830 1,181 854 Compensation and reparations revenue 104,826 89,638 93,785 Revenue from foundation fund 1 3 60 Income related to transfer of assets from customers 661,212 711,839 743,051 Rental income 204,123 208,064 210,972 Others 36,690 67,208 121,816 ￦ 1,034,133 1,095,489 1,275,902
Summary of Details of Others of Other Income	(2) Details of “others” included in other income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Refund of claim for rectification ￦ 7,274 701 1,054 Adjustment of research project 7,638 —  —  Maintenance expenses on lease building 160 125 124 Training expenses 1,739 1,684 1,946 Deposit redemption 378 12 100 Reversal of expenses on litigation 991 1,920 44,197 Revenue on royalty fee 173 455 422 Reimbursement of insurance fee 1 —  —  Gains on guarantee contracts 27 22 16 Others 18,309 62,289 73,957 ￦   36,690   67,208 121,816
Summary of Other Expense	(3) Other expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Compensation and indemnification expense ￦ 663 36 34 Accretion expenses of other provisions 2,711 1,138 4,962 Depreciation expenses on investment properties 1,386 486 493 Depreciation expenses on idle assets 3,621 3,635 3,683 Other bad debt expense 49,372 6,400 40,683 Donations 152,456 131,037 169,748 Others 47,723 69,418 39,302 ￦     257,932     212,150     258,905
Summary of Others of Other Expense	(4) Details of “others” included in other expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Operating expenses related to the idle assets ￦ 44 1,683 1,494 Research grants 109 562 174 Expenses related to farming and fishing village supports 17,065 11,272 13,249 Expenses related to Operating of a fitness center 6,948 8,370 8,921 Expenses on adjustment of research and development grants 2,241 260 388 Taxes and dues 119 31,985 1,935 Expenses on R&D supports 861 48 9 Others 20,336 15,238 13,132 ￦      47,723      69,418      39,302

Other Gains (Losses) (Tables)

Other Gains (Losses) (Tables)	12 Months Ended
	Dec. 31, 2023
Other Gains (Losses) [Abstract]
Summary of Other Gains (Losses)	(1) Composition of other gains (losses) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Other gains Gains on disposal of property, plant and equipment ￦ 56,284 148,667 32,196 Gains on disposal of intangible assets 1 41 136 Reversal of impairment loss on property, plant and equipment —  134,735 —  Reversal of impairment loss on intangible assets 14 —  16,035 Gains on foreign currency translation 20,598 36,097 27,123 Gains on foreign currency transaction 48,671 235,221 139,077 Gains on insurance proceeds 144 43,497 6,785 Others 250,174 294,091 346,795 Other losses Losses on disposal of property, plant and equipment (92,622 ) (100,066 ) (98,120 ) Losses on disposal of intangible assets (145 ) (116 ) (71 ) Impairment loss on property, plant and equipment (4,056 ) (37,311 ) (17,031 ) Impairment loss on intangible assets —  (164 ) (2,865 ) Impairment loss on other non-current (16,035 ) —  —  Losses on foreign currency translation (4,732 ) (14,738 ) (3,901 ) Losses on foreign currency transaction (67,990 ) (299,117 ) (165,187 ) Others (181,787 ) (197,715 ) (258,286 ) ￦      8,519       243,122      22,686
Summary of Others of Other Gains	(2) Details of “others” included in other gains for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Gains on disposal of inventories ￦ 4,446 11,091 20,447 Gains on proxy collection of TV license fee     42,271         42,286     41,372 Gains on compensation of impaired electric poles 812 768 1,138 Gains on harbor facilities dues 3,281 4,198 3,666 Gains on technical fees 3,968 2,972 3,071 Reversal of occupation development training fees 229 525   1,452 Gains on disposal of waste 4,272 7,749 3,815 Gains on insurance 690 —  —  Gains on tax rebate 685   548 374 Gains on other commission 1,822 2,097 2,044 Gains on disposal of greenhouse gas emissions rights 8,739 —  —  Gains on disposal of assets held-for-sale 160 236 —  Others 178,799 221,621 269,416 ￦ 250,174 294,091 346,795
Summary of Others of Other Losses	(3) Details of “others” included in other losses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Losses on valuation of inventories ￦ 7,761 14,528 9,936 Losses on disposal of inventories 8,874 8,324   5,471 Losses due to disaster 6,238 5,068 7,138 Losses on rounding adjustment of electric charge surtax 1,283   1,317 1,332 Loss on disposal of greenhouse gas emissions rights 11,282 —  —  Others 146,349 168,478 234,409 ￦    181,787        197,715 258,286

Finance Income (Tables)

Finance Income (Tables)	12 Months Ended
	Dec. 31, 2023
Finance income [Abstract]
Summary of Finance Income	(1) Finance income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Interest income ￦ 221,874 340,753 429,620 Dividends income 10,522 28,875 25,941 Gains on disposal of financial assets 7,718 11,199 13,162 Gains on valuation of financial assets at fair value through profit or loss 14,338 7,099 152,322 Gains on valuation of derivatives 860,011 595,256 382,611 Gains on transaction of derivatives 124,900   429,847 268,618 Gains on foreign currency translation 146,349 389,361   104,901 Gains on foreign currency transaction 15,618 29,997 42,886 Other financial income 1,284 925 4,970 ￦  1,402,614    1,833,312  1,425,031
Summary of Interest Income	(2) Details of interest income included in finance income for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Cash and cash equivalents ￦ 12,692 51,872 100,205 Financial assets at fair value through profit or loss 18,415 58,540 65,470 Financial assets at amortized cost 797 1,308   2,929 Loans 25,196   33,545 44,029 Short-term financial instruments 7,531 15,827 34,260 Long-term financial instruments 12,470 14,371 14,183 Other financial assets 230 637 241 Trade and other receivables 144,543 164,653 168,303 ￦     221,874       340,753  429,620

Finance Expenses (Tables)

Finance Expenses (Tables)	12 Months Ended
	Dec. 31, 2023
Finance Expenses [Abstract]
Summary of Finance Expenses	(1) Finance expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Interest expense ￦ 1,914,457 2,818,546 4,451,659 Losses on sale of financial assets 1,045 1,841 1 Losses on valuation of financial assets at fair value through profit or loss 5,480 44,329 24,015 Losses on valuation of derivatives 37,017 371,038 148,412 Losses on transaction of derivatives 40,818 205,162 178,959 Losses on foreign currency translation 1,159,334 934,005 491,782 Losses on foreign currency transaction 83,558 346,711 49,677 Losses on repayment of financial liabilities 10 15 —  Others 4,058 25,144 2,513 ￦ 3,245,777 4,746,791 5,347,018
Summary of Interest Expenses	(2) Details of interest expense included in finance expenses for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Trade and other payables ￦ 213,765 204,078 200,440 Short-term borrowings 42,371 145,201 376,066 Long-term borrowings 115,141 204,037 407,915 Debt securities 1,728,588 2,388,517 3,634,680 Other financial liabilities 384,423 472,248 614,332 2,484,288 3,414,081 5,233,433 Less: Capitalized borrowing costs (569,831 ) (595,535 ) (781,774 ) ￦ 1,914,457 2,818,546 4,451,659

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Taxes [Abstract]
Summary of Income Tax Expense (Benefit)	(1) Income tax expense (benefit) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Current income tax expense Payment of income tax ￦ 357,767 563,681 621,957 Adjustment in respect of prior years due to change in estimate 153,113 48,374 (32,100 ) Current income tax directly recognized in equity (198,714 ) (350,348 ) 93,705 312,166 261,707 683,562 Deferred tax benefit Generation and realization of temporary differences (489,411 ) (564,801 ) (1,845,236 ) Reclassified from equity to profit (loss) —  (4,964 ) —  Changes of unrecognized tax losses, tax credit and temporary differences for prior periods (43,653 ) (38,708 ) (15,244 ) Changes in deferred tax on tax losses carryforwards (1,641,823 ) (9,175,755 ) (1,650,017 ) Tax credit carryforwards (12,199 ) 34,019 (16,734 ) Amount due to change in tax rate or regulations 18,931 73,991 5,836 (2,168,155 ) (9,676,218 ) (3,521,395 ) Income tax benefit ￦ (1,855,989 ) (9,414,511 ) (2,837,833)
Summary of Reconciliation Between Actual Income Tax Benefit and Amount Computed by Applying the Statutory Tax Rate	(2) Reconciliation between actual income tax benefit and amount computed by applying the statutory tax rate to loss before income taxes for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won L ￦ (7,071,570 ) (33,843,619 ) (7,553,977 ) Income tax benefit computed at applicable tax rate (*1) (1,944,682 ) (9,306,995 ) (1,936,840 ) Adjustments Effect of applying gradual tax rate (10,362 ) (10,362 ) (10,362 ) Effect of non-taxable (4,983 ) (9,471 ) (26,993 ) Effect of non-deductible 78,814 39,663 39,411 Effect of tax losses that are not recognized as deferred tax asset 1,351 19,275 —  Effects of tax credits and deduction (43,931 ) (98,684 ) (53,724 ) Reversal of unrecognized deferred tax asset, net (43,641 ) (38,708 ) (15,244 ) Effect of change in deferred tax due to change in tax rate 18,931 393,416 211,736 Deduction of deferred tax assets 73,887 (85,514 ) 29,095 Deferred tax related to investments in subsidiaries, associates and joint ventures (135,878 ) (375,064 ) (1,063,007 ) Others, net 1,392 9,559 20,195 (64,420 ) (155,890 ) (868,893 ) Adjustment in respect of prior years due to change in estimate 153,113 48,374 (32,100 ) Income tax benefit ￦ (1,855,989 ) (9,414,511 ) (2,837,833 ) Effective tax rate (*2 ) (*2 ) (*2 ) (*1) Applicable tax rates are 27.5%, of December 31, 2021, 2022 and 2023, respectively. (*2) The effective tax rate for the year ended December 31, 2021, 2022 and 2023 is not calculated due to income tax benefit.
Summary of Income Tax Directly Adjusted to Shareholders' Equity (Except for Accumulated Other Comprehensive Income (Loss))	(3) Income tax directly adjusted to equity (except for accumulated other comprehensive income (loss)) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Dividends of hybrid bond ￦ 4,736 4,149 —  Disposal of subsidiaries —  406 —  ￦   4,736   4,555   —
Summary of Income Tax Recognized as Other Comprehensive Income (Loss)	(4) Income tax recognized as other comprehensive income (loss) for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 2022 2023 In millions of won Income tax recognized as other comprehensive income (loss) L ￦ (9,753 ) (31,416 ) (10,624 ) Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax 24,220 40,390 4,863 Remeasurement of defined benefit liability (126,890 ) (322,489 ) 133,134 Investments in associates (53,672 ) (66,677 ) (40,213 ) Others (37,355 ) 25,289 6,545 ￦ (203,450 ) (354,903 ) 93,705
Summary of Changes in Deferred Income Tax Assets (Liabilities)	(5) Changes in deferred tax assets (liabilities) recognized in the consolidated statements of financial position for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning balance Amounts Amount Amounts recognized directly in equity Ending balance In millions of won Deferred tax on temporary differences Employee benefits ￦ 558,383 (36,341 ) (322,489 ) —  199,553 Cash flow hedge (49,947 ) (46,188 ) 40,390 405 (55,340 ) Investments in subsidiaries, associates and joint ventures (8,721,320 ) 410,310 (66,677 ) —  (8,377,687 ) Property, plant and equipment (7,430,461 ) (111,177 ) —  —  (7,541,638 ) Finance lease (415,558 ) 9,919 —  —  (405,639 ) Intangible assets (31,481 ) 6,550 —  —  (24,931 ) Financial assets at fair value through profit or loss 12 3,445 —  —  3,457 Financial assets at fair value through other comprehensive income 27,381 25,178 (31,416 ) —  21,143 Deferred revenue 186,391 (16,411 ) —  —  169,980 Provisions 6,494,314 595,030 —  —  7,089,344 Doubtful receivables 801 1,673 —  —  2,474 Other finance liabilities 31,410 (14,142 ) —  4,150 21,418 Gains or losses on foreign exchange translation 91,411 42,905 —  —  134,316 Allowance for doubtful accounts 64,264 (6,029 ) —  —  58,235 Accrued income 10,002 6,612 —  —  16,614 Special deduction for property, plant and equipment (224,127 ) 8,968 —  —  (215,159 ) Others 1,445,827 16,456 25,289 —  1,487,572 (7,962,698 ) 896,758 (354,903 ) 4,555 (7,416,288 ) Deferred tax on unused tax losses and tax credit Unused tax losses 2,559,877 9,102,228 —  —  11,662,105 Excess of donation limit 69,185 11,861 —  —  81,046 Tax credit 134,690 15,719 —  —  150,409 2,763,752 9,129,808 —  —  11,893,560 ￦ (5,198,946 ) 10,026,566 (354,903 ) 4,555 4,477,272 2023 Beginning balance Amounts Amount Amounts recognized directly in equity Ending balance In millions of won Deferred tax on temporary differences Employee benefits ￦ 199,553 6,597 133,134 —  339,284 Cash flow hedge (55,340 ) 29,622 4,863 —  (20,855 ) Investments in subsidiaries, associates and joint ventures (8,377,687 ) 1,300,263 (40,213 ) —  (7,117,637 ) Property, plant and equipment (7,541,638 ) 534,361 —  —  (7,007,277 ) Finance lease (405,639 ) 179,943 —  —  (225,696 ) Intangible assets (24,931 ) 1,526 —  —  (23,405 ) Financial assets at fair value through profit or loss 3,457 (5,199 ) —  —  (1,742 ) Financial assets at fair value through other comprehensive income 21,143 16,839 (10,624 ) —  27,358 Deferred revenue 169,980 (13,580 ) —  —  156,400 Provisions 7,089,344 (47,684 ) —  —  7,041,660 Doubtful receivables 2,474 (74 ) —  —  2,400 Other finance liabilities 21,418 (3,426 ) —  —  17,992 Gains or losses on foreign exchange translation 134,316 (6,306 ) —  —  128,010 Allowance for doubtful accounts 58,235 (2,492 ) —  —  55,743 Accrued income 16,614 17,321 —  —  33,935 Special deduction for property, plant and equipment (215,159 ) 3,299 —  —  (211,860 ) Others 1,487,572 (277,889 ) 6,545 —  1,216,228 (7,416,288 ) 1,733,121 93,705 —  (5,589,462 ) Deferred tax on unused tax losses and tax credit Unused tax losses 11,662,105 1,676,638 —  —  13,338,743 Excess of donation limit 81,046 (34,724 ) —  —  46,322 Tax credit 150,409 52,665 —  —  203,064 11,893,560 1,694,569 —  —  13,588,129 ￦ 4,477,272 3,427,690 93,705 —  7,998,667
Summary of Deferred Income Tax Assets (Liabilities)	(6) Deferred tax assets (liabilities) recognized in the consolidated statements of financial position as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Deferred tax assets ￦ 10,934,375 13,161,802 Deferred tax liabilities (6,457,103 ) (5,163,135 ) ￦ 4,477,272 7,998,667
Summary of Deductible Temporary Differences, Tax Losses and Unused Tax Credits for Which No Deferred Income Tax Assets Were Recognized	(7) Details of deductible temporary differences, tax losses and unused tax credits for which no deferred tax assets were recognized as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Deductible temporary differences and others ￦ 1,381,532 1,811,062

Assets Held-for-Sale (Tables)

Assets Held-for-Sale (Tables)	12 Months Ended
	Dec. 31, 2023
Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract]
Assets Held-for-Sale	Assets held-for-sale 2022 2023 In millions of won Land (*1,2) ￦ 31,766 31,766 Buildings (*1,2) 12,981 13,881 Structures (*1) 1 1 ￦ 44,748 45,648 (*1) The board of directors of KEPCO Engineering & Construction Company, Inc., a subsidiary of the Company, made a resolution to sell its old office building in Yongin-si, held-for-sale (*2) The board of directors of Korea Electric Power Corporation, the controlling company, made a resolution to sell the Uijeongbu substation, and reclassified the buildings and land as assets held-for-sale transaction during the year ended December 31, 2022.

Expenses Classified by Nature (

Expenses Classified by Nature (Tables)	12 Months Ended
	Dec. 31, 2023
Expenses by nature [abstract]
Expenses Classified by Nature	Expenses classified by nature for the years ended December 31, 2021, 2022 and 2023 are as follows: 2021 Selling and Cost of Total In millions of won Raw materials used ￦ —  18,660,477 18,660,477 Power purchase —  21,619,039 21,619,039 Salaries 1,121,188 4,276,494 5,397,682 Retirement benefit expense 113,127 488,263 601,390 Welfare and benefit expense 155,558 570,440 725,998 Insurance expense 17,909 104,544 122,453 Depreciation 219,427 11,551,897 11,771,324 Amortization of intangible assets 91,428 74,733 166,161 Bad debt expense 17,968 —  17,968 Commission 410,287 307,272 717,559 Advertising expense 29,230 9,552 38,782 Training expense 4,923 13,283 18,206 Vehicle maintenance expense 8,849 8,152 17,001 Publishing expense 3,568 3,310 6,878 Business promotion expense 3,522 3,777 7,299 Rent expense 43,650 194,234 237,884 Telecommunication expense 8,569 10,959 19,528 Transportation expense 870 53,365 54,235 Taxes and dues 93,446 529,380 622,826 Expendable supplies expense 9,052 41,414 50,466 Water, light and heating expense 12,351 43,025 55,376 Repairs and maintenance expense 123,134 2,494,861 2,617,995 Ordinary development expense 213,936 475,461 689,397 Travel expense 11,099 67,103 78,202 Clothing expense 10,540 7,994 18,534 Survey and analysis expense 889 3,992 4,881 Membership fee 1,331 8,492 9,823 Others 149,945 2,022,777 2,172,722 ￦ 2,875,796 63,644,290 66,520,086 2022 Selling and Cost of Total In millions of won Raw materials used ￦ —  34,832,581 34,832,581 Power purchase —  41,984,858 41,984,858 Salaries 1,142,360 4,329,099 5,471,459 Retirement benefit expense 109,758 505,612 615,370 Welfare and benefit expense 155,781 540,058 695,839 Insurance expense 20,835 106,672 127,507 Depreciation 244,676 12,056,455 12,301,131 Amortization of intangible assets 85,661 70,499 156,160 Bad debt expense 23,634 —  23,634 Commission 420,390 351,557 771,947 Advertising expense 33,739 10,552 44,291 Training expense 7,327 14,813 22,140 Vehicle maintenance expense 10,749 10,275 21,024 Publishing expense 3,732 3,014 6,746 Business promotion expense 3,198 3,340 6,538 Rent expense 47,680 186,439 234,119 Telecommunication expense 7,945 9,677 17,622 Transportation expense 1,012 113,845 114,857 Taxes and dues 122,177 554,320 676,497 Expendable supplies expense 9,617 47,159 56,776 Water, light and heating expense 17,950 60,002 77,952 Repairs and maintenance expense 152,449 2,586,975 2,739,424 Ordinary development expense 213,932 513,878 727,810 Travel expense 16,062 78,999 95,061 Clothing expense 13,044 8,778 21,822 Survey and analysis expense 1,126 4,322 5,448 Membership fee 1,469 16,912 18,381 Others 143,119 1,902,903 2,046,022 ￦ 3,009,422 100,903,594 103,913,016 2023 Selling and Cost of sales Total In millions of won Raw materials used ￦ —  27,135,770 27,135,770 Power purchase —  38,304,309 38,304,309 Salaries 1,098,460 4,416,706 5,515,166 Retirement benefit expense 89,533 370,769 460,302 Welfare and benefit expense 152,836 542,367 695,203 Insurance expense 27,726 119,964 147,690 Depreciation 241,533 12,623,380 12,864,913 Amortization of intangible assets 88,648 74,526 163,174 Bad debt expense 62,808 —  62,808 Commission 460,644 341,124 801,768 Advertising expense 30,305 8,856 39,161 Training expense 7,900 16,064 23,964 Vehicle maintenance expense 9,044 9,128 18,172 Publishing expense 3,281 2,879 6,160 Business promotion expense 2,559 2,523 5,082 Rent expense 44,807 161,749 206,556 Telecommunication expense 7,813 9,706 17,519 Transportation expense 1,099 102,502 103,601 Taxes and dues 112,449 574,617 687,066 Expendable supplies expense 7,252 47,252 54,504 Water, light and heating expense 16,207 41,200 57,407 Repairs and maintenance expense 154,062 2,620,200 2,774,262 Ordinary development expense 217,319 500,242 717,561 Travel expense 16,265 77,232 93,497 Clothing expense 10,450 9,490 19,940 Survey and analysis expense 1,068 4,156 5,224 Membership fee 1,503 15,164 16,667 Others 196,011 1,567,652 1,763,663 ￦ 3,061,582 89,699,527 92,761,109

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2023
Earnings per share [abstract]
Basic Earnings Per Share	(1) Basic earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In won Basic earnings (loss) per share ￦ (8,263 ) (38,112 ) (7,512 )
Diluted Earnings Per Share	(2) Diluted earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In won Diluted earnings (loss) per share ￦ (8,263 ) (38,112 ) (7,512 )
Calculation of Basic Earnings Per Share	(3) Basic earnings (loss) per share Profit (loss) for the year and weighted average number of common shares used in the calculation of basic earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In millions of won except number of shares Profit (loss) attributable to owners of the controlling company ￦ (5,304,522 ) (24,466,853 ) (4,822,549 ) Profit (loss) used in the calculation of total basic earnings (loss) per share (5,304,522 ) (24,466,853 ) (4,822,549 ) Weighted average number of common shares 641,964,077 641,964,077 641,964,077
Calculation of Diluted Earnings Per Share	(4) Diluted earnings (loss) per share Diluted earnings (loss) per share is calculated by applying adjusted weighted average number of common shares under the assumption that all dilutive potential common shares are converted to common shares. Profit (loss) used in the calculation of total diluted earnings (loss) per share for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In millions of won Profit (loss) used in the calculation of total diluted earnings (loss) per share ￦ (5,304,522 ) (24,466,853 ) (4,822,549 ) Weighted average number of common shares used in calculating diluted earnings (loss) per share are adjusted from weighted average number of common shares used in calculating basic earnings (loss) per share. Detailed information of the adjustment for the years ended December 31, 2021, 2022 and 2023 are as follows: Type 2021 2022 2023 In number of shares Weighted average number of common shares 641,964,077 641,964,077 641,964,077 Diluted weighted average number of shares 641,964,077 641,964,077 641,964,077

Risk Management (Tables)

Risk Management (Tables)	12 Months Ended
	Dec. 31, 2023
Risk Management [Abstract]
Summary of Capital Risk Management	Details of the Company’s capital management accounts as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Total borrowings and debt securities ￦ 120,605,365 133,631,830 Cash and cash equivalents 3,234,780 4,342,887 Net borrowings and debt securities 117,370,585 129,288,943 Total equity 42,000,256 37,264,750 Debt to equity ratio 279.45 % 346.95 %
Summary of Maximum Exposure to Credit Risk	Book values of the financial assets represent the maximum exposed amounts of the credit risk. Details of the Company’s level of maximum exposure to credit risk as of December 31, 2022 and 2023 are as follows: 2022 2023 In millions of won Cash and cash equivalents ￦ 3,234,780 4,342,887 Financial assets at fair value through profit or loss(*1) 3,610,408 2,590,228 Derivative assets (trading) 693,072 730,948 Financial assets at fair value through other comprehensive income (debt securities) 529 4,627 Financial assets at amortized cost 26,998 38,843 Loans 1,013,371 988,331 Long-term/short-term financial instruments 1,353,080 1,412,315 Derivative assets (applying hedge accounting) 324,952 269,446 Trade and other receivables 12,614,902 14,179,322 Financial guarantee contracts(*2) 3,776,060 4,399,189 (*1) Equity investments held by the Company are excluded. (*2) Maximum exposure associated with the financial guarantee contracts is the maximum amounts of the obligation. For the year ended December 31, 2023, there are no financial assets and non-financial
Summary of Sensitivity Analysis for Actuarial Assumptions	A sensitivity analysis of defined benefit obligation assuming a 1% increase and decrease movements in the actuarial valuation assumptions as of December 31, 2022 and 2023 are as follows: 2022 2023 Type Accounts 1% Increase 1% Decrease 1% Increase 1% Decrease In millions of won Future salary increases Increase (decrease) in defined benefit obligation ￦ 321,930 (283,658 ) 392,392 (361,359 ) Discount rate Increase (decrease) in defined benefit obligation (289,229 ) 337,033 (371,103 ) 415,361 Changes of employee benefits assuming a 1% increase and decrease movements in discount rate on plan asset for the years ended December 31, 2022 and 2023 are ￦27,495 million and ￦29,993 million, respectively.
Summary of Principal Assumptions on Provisions Valuation	Changes in provisions due to movements in underlying assumptions as of December 31, 2022 and 2023 are as follows: Type Accounts 2022 2023 PCBs Inflation rate 1.98 % 2.40 % Discount rate 1.92 % 2.12 % Nuclear plants Inflation rate 2.25 % 1.91 % Discount rate 2.48 % 2.76 % Spent fuel Inflation rate 2.93 % 1.91 % Discount rate 4.49 % 2.49 % Radioactive waste Inflation rate 3.06 % 3.89 % Discount rate 2.62 % 3.65 %
Summary of Sensitivity Analysis for Provisions Assumptions	A sensitivity analysis of provisions assuming a 0.1% increase and decrease movements in the underlying assumptions as of December 31, 2022 and 2023 are as follows: 2022 2023 Type Accounts 0.1%p Increase 0.1%p Decrease 0.1%p Increase 0.1%p Decrease In millions of won Discount rate PCBs ￦ (169 ) 169 (123 ) 123 Nuclear plants (474,432 ) 491,360 (418,570 ) 432,847 Spent fuel (54,330 ) 56,453 (130,065 ) 130,761 Radioactive waste (15,089 ) 15,260 (13,538 ) 13,683 Inflation rate PCBs 169 (169 ) 123 (123 ) Nuclear plants 515,262 (498,258 ) 458,047 (443,531 ) Spent fuel 57,269 (55,191 ) 133,931 (128,607 ) Radioactive waste 14,190 (14,056 ) 13,291 (13,174 )
Summary of Foreign Currency Risk	The Company undertakes transactions denominated in foreign currencies; consequently, exposures to exchange rate fluctuations arise. The carrying amounts of the Company’s foreign currency denominated monetary assets and monetary liabilities as of December 31, 2022 and 2023 are as follows: Assets Liabilities Type 2022 2023 2022 2023 In thousands of foreign currencies AED 5,610 24,441 25,597 18,143 AUD 4,448 4,310 299,663 299,795 BDT 7,514 2,260 —  —  BWP 824 777 —  —  EGP —  1,665 1,162 1,941 CAD 89 —  595 —  CHF —  —  500,158 499,930 CZK —  —  153 —  EUR 1,976 12,259 41,073 81,744 GBP —  75 31 —  HKD —  —  4,014,446 5,079,189 IDR 598,697 25,567,281 1,323,840 2,118,580 INR 1,592,380 1,663,705 312,978 387,947 JOD 1,146 569 14 68,448 JPY 568,263 921,120 1,719,846 8,692,604 KZT 1,510 1,510 —  —  MGA 2,856,045 3,545,076 347,403 495,288 MMK 199,518 199,518 —  —  MYR 38,177 2,805 —  —  PHP 68,592 98,154 7,493 6,750 PKR 533,816 75,206,354 219,341 55,531 RUB —  —  2,881 —  SAR 1,713 937 9,710 —  SEK —  —  449,211 452,309 SGD —  279 —  2,191 THB —  —  389 —  USD 1,484,614 1,701,494 13,599,643 14,458,985 UYU 128,674 120,768 3,106 2,028 VND 1,184,670 848,242 4,495 —  ZAR 43,461 87,780 —  —
Summary of Sensitivity Analysis for Foreign Currency Exchange Rates	A sensitivity analysis on the Company’s income for the period assuming a 10% increase and decrease in currency exchange rates as of December 31, 2022 and 2023 are as follows: 2022 2023 Type 10% Increase 10% Decrease 10% Increase 10% Decrease In millions of won Increase (decrease) of profit before income tax ￦ (1,703,053 ) 1,703,053 (1,828,308 ) 1,828,308 Increase (decrease) of equity(*) (1,703,053 ) 1,703,053 (1,828,308 ) 1,828,308 (*) The effect on the shareholders’ equity excluding the impact of income taxes.
Summary of Interest Rate Risk	The Company’s borrowings and debt securities with floating interest rates as of December 31, 2022 and 2023 are as follows: Type 2022 2023 In millions of won Short-term borrowings ￦ 3,154,972 4,435,420 Long-term borrowings 5,388,073 7,766,588 Debt securities 269,101 305,602 ￦ 8,812,146 12,507,610
Summary of Sensitivity Analysis for Interest Rates	A sensitivity analysis on the Company’s long-term borrowings and debt securities assuming a 1% increase and decrease in interest for the years ended December 31, 2022 and 2023 are as follows: 2022 2023 Type 1%p Increase 1%p Decrease 1%p Increase 1%p Decrease In millions of won Increase (decrease) of profit before income tax ￦ (88,121 ) 88,121 (125,076 ) 125,076 Increase (decrease) of shareholder’s equity(*) (88,121 ) 88,121 (125,076 ) 125,076 (*) The effect on the shareholders’ equity excluding the impact of income taxes.
Summary of Sensitivity Analysis for Electricity Rates	A sensitivity analysis on the Company’s income for the period assuming a 1% increase and decrease in price of electricity for the years ended December 31, 2022 and 2023 is as follows: 2022 2023 Type 1% Increase 1% Decrease 1% Increase 1% Decrease In millions of won Increase (decrease) of profit before income tax ￦ 661,990 (661,990 ) 829,548 (829,548 ) Increase (decrease) of shareholder’s equity(*) 661,990 (661,990 ) 829,548 (829,548 ) (*) The effect on the equity excluding the impact of income taxes.
Summary of Maturity Analysis for Non Derivative Financial Liabilities	The expected maturities for non-derivative 2022 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Borrowings and debt securities ￦ 26,157,747 27,367,577 47,361,676 37,115,832 138,002,832 Lease liabilities 639,756 657,210 1,390,374 1,925,012 4,612,352 Trade and other payables(*1) 11,369,512 347,563 1,008,133 734,112 13,459,320 Financial guarantee contracts(*2) 105,091 54,310 3,495,437 121,222 3,776,060 ￦ 38,272,106 28,426,660 53,255,620 39,896,178 159,850,564 2023 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Borrowings and debt securities ￦ 50,878,929 29,046,036 42,420,850 32,778,830 155,124,645 Lease liabilities 641,525 588,850 1,309,996 1,694,729 4,235,100 Trade and other payables(*1) 8,477,209 364,443 833,394 589,004 10,264,050 Financial guarantee contracts(*2) 121,415 2,546,689 1,645,488 85,597 4,399,189 ￦  60,119,078  32,546,018  46,209,728  35,148,160  174,022,984 (*1) Excludes lease liabilities. (*2) This represents the total guarantee amounts associated with the financial guarantee contracts. Financial guarantee liabilities which are recognized as of December 31, 2022 and 2023 are W
Summary of Maturity Analysis for Non Derivative Financial Assets	The expected maturities for non-derivative 2022 Type Less than 1 year 1~5 Years More than 5 years Other (*) Total In millions of won Cash and cash equivalents ￦ 3,234,780 — — — 3,234,780 Financial assets at fair value through other comprehensive income — — — 502,829 502,829 Financial assets at amortized cost 16,762 10,231 5 — 26,998 Loans 132,877 411,594 502,050 — 1,046,521 Long-term/short-term financial instruments 666,758 — 25 686,297 1,353,080 Financial assets at fair value through profit or loss 3,181,791 645 3,535 523,537 3,709,508 Trade and other receivables 10,464,191 1,083,593 1,080,831 — 12,628,615 ￦ 17,697,159 1,506,063 1,586,446 1,712,663 22,502,331 2023 Type Less than 1 year 1~5 Years More than 5 years Other (*) Total In millions of won Cash and cash equivalents ￦ 4,342,887 — — — 4,342,887 Financial assets at fair value through other comprehensive income — — — 502,443 502,443 Financial assets at amortized cost 28,905 9,938 — — 38,843 Loans 139,168 465,666 411,100 8,872 1,024,806 Long-term/short-term financial instruments 578,578 22 23 833,692 1,412,315 Financial assets at fair value through profit or loss 2,054,021 1,381 6,523 649,360 2,711,285 Trade and other receivables 11,990,515 911,822 1,292,539 1,280 14,196,156 ￦ 19,134,074 1,388,829 1,710,185 1,995,647 24,228,735 (*) The maturities cannot be presently determined.
Summary of Maturity Analysis for Derivative, Undiscounted Cash Flows	Derivative liabilities classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2022 and 2023 are as follows: 2022 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Net settlement — Trading ￦ —  —  —  —  —  Gross settlement — Trading and others (42,663 ) (15,225 ) (171,130 ) (84,924 ) (313,942 ) — Hedging —  (10,064 ) (5,176 ) (10,265 ) (25,505 ) ￦ (42,663) (25,289 ) (176,306) (95,189 ) (339,447 ) 2023 Type Less than 1 year 1~2 Years 2~5 Years More than 5 years Total In millions of won Net settlement           — Trading ￦ —  —  —  —  —  Gross settlement — Trading and others (22,571 ) (11,566 ) (201,590 ) (130,119 ) (365,846 ) — Hedging —  (4,680 ) (13,243 ) (5,641 ) (23,564 ) ￦ (22,571 ) (16,246 ) (214,833 ) (135,760 ) (389,410 )
Summary of Maturity Analysis for Derivative Financial Assets	Derivative assets classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2022 and 2023 are as follows: 2022 Type Less than 1 year 1~2 2~5 Years More than 5 years Total In millions of won Net settlement — Trading ￦ —  —  —  —  —  Gross settlement — Trading 861,621  160,938 (352,657) 65,661 735,563 — Hedging 134,390 47,502 131,258 —  313,150 ￦ 996,011 208,440 (221,399 ) 65,661 1,048,713 2023 Type Less than 1 year 1~2 2~5 Years More than 5 years Total In millions of won Net settlement — Trading ￦ —  —  —  —  —  Gross settlement — Trading 257,073 123,132 169,004 145,728 694,937 — Hedging 78,769 61,031 131,687 —  271,487 ￦ 335,842 184,163 300,691 145,728 966,424
Summary of Fair Value Measurement of Instruments	Fair value and book value of financial assets and liabilities as of December 31, 2022 and 2023 are as follows: 2022 2023 Type Book value Fair value Book value Fair value In millions of won Assets recognized at fair value Financial assets at fair value through other comprehensive income ￦ 502,829 502,829 502,443 502,443 Derivative assets (trading) 693,072 693,072 730,948 730,948 Derivative assets (hedge designated) 324,952 324,952 269,446 269,446 Financial assets at fair value through profit or loss 3,709,508 3,709,508 2,711,285 2,711,285 ￦ 5,230,361 5,230,361 4,214,122 4,214,122 Assets carried at amortized cost Financial assets at amortized cost ￦ 26,998 26,998 38,843 38,843 Loans and receivables 1,013,371 1,013,371 988,331 988,331 Trade and other receivables 12,614,902 12,614,902 14,179,322 14,179,322 Long-term financial instruments 686,322 686,322 833,737 833,737 Short-term financial instruments 666,758 666,758 578,578 578,578 Cash and cash equivalents 3,234,780 3,234,780 4,342,887 4,342,887 ￦ 18,243,131 18,243,131 20,961,698 20,961,698 Liabilities recognized at fair value Derivative liabilities (trading) ￦ 407,246 407,246 428,670 428,670 Derivative liabilities (hedge designated) 25,505 25,505 23,564 23,564 ￦ 432,751 432,751 452,234 452,234 Liabilities carried at amortized cost Secured borrowings ￦ 102,368 102,368 773,646 773,646 Unsecured bond 105,185,189 96,846,056 113,792,178 111,218,771 Lease liabilities 4,163,143 4,163,143 3,807,880 3,807,880 Unsecured borrowings 15,282,193 15,280,693 19,062,162 19,061,348 Trade and other payables(*) 13,459,320 13,459,320 10,264,050 10,264,050 Bank overdraft 35,615 35,615 3,844 3,844 ￦ 138,227,828 129,887,195 147,703,760 145,129,539 (*) Excludes lease liabilities.
Summary of Significant Unobservable Inputs Used in Fair Value Measurement of Financial Instruments	The discount rates used for calculating fair value as of December 31, 2022 and 2023 are as follows: Type 2022 2023 Derivatives 0.60% ~ 7.93% 0.93%~10.36% Borrowings and debt securities 0.75% ~ 5.84% 0.96%~5.84% Finance lease 0.00% ~ 17.08% 0.00%~17.03%
Summary of Fair Value Measurement of Financial Instruments	Fair values of financial instruments by hierarchy level as of December 31, 2022 and 2023 are as follows: 2022 Type Level 1 Level 2 Level 3 Total In millions of won Financial assets at fair value Financial assets at fair value through other comprehensive income ￦ 300,057 —  202,772 502,829 Derivative assets —  1,018,024 —  1,018,024 Financial assets at fair value through profit or loss —  3,703,179 6,329 3,709,508 ￦ 300,057 4,721,203 209,101 5,230,361 Financial liabilities at fair value Derivative liabilities ￦ —  432,751 —  432,751 2023 Type Level 1 Level 2 Level 3 Total In millions of won Financial assets at fair value Financial assets at fair value through other comprehensive income ￦ 285,054 —  217,389 502,443 Derivative assets —  1,000,394 —  1,000,394 Financial assets at fair value through profit or loss —  2,704,550 6,735 2,711,285 ￦ 285,054 3,704,944 224,124 4,214,122 Financial liabilities at fair value Derivative liabilities ￦ —  452,234 —  452,234
Summary of Reconciliation of Changes in Fair Value Measurement, Assets	Changes of financial assets and liabilities which are classified as level 3 for the years ended December 31, 2022 and 2023 are as follows: 2022 Beginning Acquisitions Reclassified Valuation Disposal Foreign Ending In millions of won Financial assets at fair value Financial assets at fair value through profit or loss Cooperative ￦ 5,797 400 —  132 —  —  6,329 Financial assets at fair value through other comprehensive income Unlisted securities 160,790 9,451 —  33,237 —  (1,235 ) 202,243 Debt securities 491 —  —  38 —  —  529 2023 Beginning Acquisitions Reclassified Valuation Disposal Foreign Ending In millions of won Financial assets at fair value Financial assets at fair value through profit or loss Cooperative ￦ 6,329 —  270 136 —  —  6,735 Financial assets at fair value through other comprehensive income Unlisted securities 202,243 9,550 —  5,445 (5,332) 856 212,762 Debt securities 529 4,080 —  18 —  —  4,627

Service Concession Arrangemen_2

Service Concession Arrangements (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about service concession arrangements [abstract]
Hydroelectric Power Generation at Semangka, Indonesia	The Company’s expected future collections of service concession arrangements as of December 31, 2023 are as follows: Type Amounts In millions of won Less than 1 year ￦ 32,354 1 ~ 2 years 32,281 2 ~ 3 years 32,321 Over 3 years 525,642 ￦ 622,598
CPPAg Power Generation	The Company’s expected future collections of service concession arrangements as of December 31, 2023 are as follows: Type Amounts In millions of won Less than 1 year ￦ 75,717 1 ~ 2 years 75,717 2 ~ 3 years 75,717 Over 3 years 893,254 ￦ 1,120,405

Related Parties (Tables)

Related Parties (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of transactions between related parties [abstract]
Summary of Related Party Transactions	(3) Related party transactions for the years ended December 31, 2021, 2022 and 2023 are as follows: <Sales and Others> Sales and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Korea Gas Corporation Electricity sales ￦ 96,362 155,309 140,630 Goseong Green Power Co., Ltd. Electricity sales 514,470 1,062,108 842,270 Dongducheon Dream Power Co., Ltd. Electricity sales 19,923 8,942 16,138 Saemangeum Sebit Power Plant Co., Ltd. Electricity sales — 1,418 2,313 Daejung Offshore Wind Power Co., Ltd. Electricity sales 46 46 84 Daegu Photovoltaic Co., Ltd. Electricity sales 207 268 408 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Electricity sales 2 2 3 Korea Electric Power Industrial Development Co., Ltd. Service 11,208 10,369 11,115 Gangneung Eco Power Co., Ltd. Fuel sales 14,200 459,404 943,063 Shin Pyeongtaek Power Co., Ltd. Electricity sales 23,501 27,486 91,830 Noeul Green Energy Co., Ltd. Electricity sales 30 9,396 8,431 Samcheok Eco Materials Co., Ltd. Electricity sales 620 546 615 YTN Co., Ltd. Electricity sales 1,922 2,180 2,908 Busan Green Energy Co., Ltd. Electricity sales 49 5,055 10,733 Gunsan Bio Energy Co., Ltd. Electricity sales 20 — — Korea Electric Vehicle Charging Service (*5) Electricity sales 3,039 3,686 — Energy Infra Asset Management Co., Ltd. Electricity sales 4,629 — 89 Gangwon Wind Power Co., Ltd. Electricity sales 1,865 1,549 2,464 Gwangyang Green Energy Co., Ltd. Electricity sales 486 1,848 1,492 Bigeum Resident Photovoltaic Power Co., Ltd. Electricity sales 755 660 888 Hyundai Green Power Co., Ltd. Electricity sales 11,934 7,063 6,668 Korea Power Exchange Service 39,796 16,596 52,262 Taebaek Wind Power Co., Ltd. (*1) Service 44 861 — Taebaek Guinemi Wind Power Co., Ltd. Electricity sales 26 — — Pyeongchang Wind Power Co., Ltd. Electricity sales 1,180 1,323 — Daeryun Power Co., Ltd. Electricity sales 1,944 2,016 3,187 Changjuk Wind Power Co., Ltd. (*4) Electricity sales 463 1,350 — GS Donghae Electric Power Co., Ltd. Electricity sales 21,127 5,238 28,164 KNH Solar Co., Ltd. Electricity sales 14 13 15 S-Power Co., Ltd. Service 5,229 4,588 4,965 Chuncheon Green Energy Co., Ltd. Electricity sales — 2 82 Yeongyang Wind Power Corporation II Commission — — 150 PND Solar Co., Ltd. Electricity sales 416 427 547 Hyundai Eco Energy Co., Ltd. Electricity sales 187 277 1,236 YeongGwang Yaksu Wind Electric Co., Ltd. Electricity sales 78 66 96 Taebaek Gadeoksan Wind Power Co., Ltd. Electricity sales 295 1,952 3,998 Korea Energy Solutions Co., Ltd. Electricity sales 2 2 2 ITR Co., Ltd. Service 3 6 3 STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Service 5 7 — Namjeongsusang Solar Power Operation Co., Ltd. (*3) Electricity sales 22 21 31 Sales and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 Service ￦ 399 394 405 Bitgoel Eco Energy Co., Ltd. Electricity sales 282 1,397 1,581 Jeju Gimnyeong Wind Power Co., Ltd. Electricity sales — 367 315 Seoroseoro Sunny Power Plant Co., Ltd. Electricity sales — 1 2 Muan Solar park Co., Ltd. Electricity sales 232 950 3,083 YuDang Solar Co., Ltd. Electricity sales — 160 100 Anjwa Smart Farm & Solar City Co., Ltd. Electricity sales 624 1,068 2,479 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Electricity sales 155 185 163 Saemangeum Heemang Photovoltaic Co., Ltd. Electricity sales 13 5,740 3,538 UD4M Co., Ltd. Electricity sales 4 2 3 Dongbu Highway Solar Co., Ltd. Electricity sales 5 8 11 Seobu Highway Solar Co., Ltd. Electricity sales 8 8 12 Santiago Solar Power SpA Dividends income — — 586 Gwangbaek Solar Power Investment Co., Ltd. Electricity sales — — 644 Go deok Clean Energy Co., Ltd. Electricity sales — — 4,685 SureDataLab Co., Ltd. Electricity sales 1 1 1 Suwon New Power Co., Ltd. Electricity sales 1,820 118 91 Hankook Electric Power Information Co., Ltd. Electricity sales 1 — — Kosture Co., Ltd. Electricity sales 1 5 — PlatformN. Co., Ltd. Others — 14 16 Muan Sunshine Solar Power Plant Co., Ltd. Electricity sales 52 17 403 Gangneung Sacheon Fuel Cell Co., Ltd. Electricity sales —  151 133 11 Associates (Overseas) Electricity sales 125,723 548,507 385,605 <Joint ventures> Seobusambo highway photovoltaics Co., Ltd. Electricity sales — 3  16 Yangyang Suri Wind Power Co., Ltd. Electricity sales — — 169 Naepo Green Energy Co., Ltd. Electricity sales 467 761 3,462 Cheongna Energy Co., Ltd. Others 16,469 39,802 32,835 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Service 8,159 7,761 2,110 Daegu Green Power Co., Ltd. Electricity sales 1,053 1,190 1,694 Prime Swedish Holding AB Electricity sales — 284 292 KAPES, Inc. Commission 413 450 1,604 Honam Wind Power Co., Ltd. Electricity sales 71 242 610 Jeongam Wind Power Co., Ltd Electricity sales 588 — — Korea Power Engineering Service Co., Ltd. Service 339 268 159 Seokmun Energy Co., Ltd. Service 1,701 1,685 1,792 Incheon New Power Co., Ltd. Construction 14 14 458 Sales and others Company name Transaction type 2021 2022 2023 In millions of won <Joint ventures> Chun-cheon Energy Co., Ltd. Electricity sales ￦ 2,329 2,505 2,976 Yeonggwangbaeksu Wind Power Co., Ltd. Electricity sales 1,836 1,898 1,962 Yeonggwang Wind Power Co., Ltd. Electricity sales 818 871 3,607 Western Power Changgi Solar Co., Ltd. Electricity sales 1,920 —  —  NH-Amundi Service 1,727 1,415 1,568 KW Nuclear Components Co., Ltd. Service 2,598 1,624 1,612 Taebaek Wind Power Co., Ltd. (*1) Others —  —  2,864 Pyeongchang Wind Power Co., Ltd. Electricity sales —  —  2,087 KEPCO-Uhde Inc. (*2) Electricity sales 10 12 — Busan Shinho Solar Power Co., Ltd. Electricity sales 376 502 1,205 Expressway Solar-light Power Generation Co., Ltd. Electricity sales — — 43 Goheung New Energy Co., Ltd. Electricity sales — 141 3,214 Gunsan Land Solar Co., Ltd. Electricity sales — 518 809 Daesan Green Energy Co., Ltd. Electricity sales 523 394 760 Cheong-Song Noraesan Wind Power Co., Ltd. Electricity sales 30 698 901 Chungsongmeon BongSan wind power Co., Ltd. Electricity sales 1 1 1 Saemangeum Solar Power Co., Ltd. Service 1,141 100 — Dangjin Eco Power Co., Ltd. Electricity sales 32 32 40 Yangyang Wind Power Co., Ltd. Electricity sales — — 13 Energyco Co., Ltd. Electricity sales 1 463 457 Hapcheon Floating Photovoltaic Power Plant Inc. Electricity sales — 544 88 Busan Industrial Solar Power Co., Ltd. Electricity sales 9 14 22 Bitsolar Energy Co., Ltd. Electricity sales 296 498 357 Omisan Wind Power Co., Ltd. Electricity sales 1 1 26 S-Power Chile SpA Interest income — — 20 Haemodum Solar Co., Ltd. Electricity sales 6 42 431 Yeongam Solar Power Co., Ltd. Electricity sales 339 379 1,131 Samsu Wind Power Co., Ltd. Electricity sales — — 514 Solaseado Solar Power Co., Ltd. Electricity sales 2,890 1,851 1,876 Yeongwol Eco Wind Co., Ltd. Electricity sales — — 102 Gurae Resident Power Co., Ltd. Electricity sales — — 8 Cheongju Eco Park Co., Ltd. Electricity sales — 204 6,397 Enel X Midland Photovoltaic, LLC Electricity sales — 12 11 Eumseong Eco Park Co., Ltd. Electricity sales — 2 19 Geumsungsan Wind Power Co., Ltd. Electricity sales — 7 68 41 Joint ventures (Overseas) Electricity sales 773,291 606,513 746,989 <Others> Korea Development Bank Electricity sales 4,177 4,134 5,467 Interest income 756 2,222 5,930 <Purchase and Others> Purchase and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Korea Gas Corporation Electricity sales ￦ 5,646,713 11,996,402 8,873,781 Goseong Green Power Co., Ltd. Electricity sales 987,540 1,905,502 1,572,074 Dongducheon Dream Power Co., Ltd. Electricity sales 750,148 2,244,332 1,744,247 Saemangeum Sebit Power Plant Co., Ltd. Electricity sales —  23,159 22,365 Daegu Photovoltaic Co., Ltd. Electricity sales 3,532 4,744 4,247 Haeng Bok Do Si Photovoltaic Power Co., Ltd. Electricity sales 393 563 408 Korea Electric Power Industrial Development Co., Ltd. Service 241,925 251,468 305,105 Gangneung Eco Power Co., Ltd. Others —  —  6,996 Shin Pyeongtaek Power Co., Ltd. Electricity sales 653,306 957,294 1,040,965 Noeul Green Energy Co., Ltd. Electricity sales 10,014 14,176 10,466 Samcheok Eco Materials Co., Ltd. Electricity sales 13,612 12,019 8,130 YTN Co., Ltd. Electricity sales 388 304 309 Busan Green Energy Co., Ltd. Electricity sales 18,996 26,219 23,211 Korea Electric Vehicle Charging Service (*5) Electricity sales 393 —  —  Energy Infra Asset Management Co., Ltd. Service 2,657 2,779 2,701 Yaksu ESS Co., Ltd. Electricity sales 1,715 851 508 Gangwon Wind Power Co., Ltd. Electricity sales 19,623 40,130 32,525 Goesan Solar park Co., Ltd. Electricity sales 6,209 7,642 6,530 Korea Power Exchange Service 86,716 93,817 82,572 Taebaek Wind Power Co., Ltd. (*1) Service and REC 5,930 7,442 —  Taebaek Guinemi Wind Power Co., Ltd. Electricity sales 5,910 6,793 5,529 Pyeongchang Wind Power Co., Ltd. Design service and others 4,099 3,884 —  Daeryun Power Co., Ltd. Electricity sales 157,234 428,534 353,371 Changjuk Wind Power Co., Ltd. (*4) Electricity sales 6,213 9,027 —  GS Donghae Electric Power Co., Ltd. Electricity sales 760,377 1,035,263 1,047,584 KNH Solar Co., Ltd. Electricity sales 3,222 4,348 3,535 S-Power Service 608,530 1,091,741 973,646 Yeongyang Wind Power Corporation II Commission —  —  1,457 PND Solar Co., Ltd. Electricity sales 5,502 6,173 5,301 Hyundai Eco Energy Co., Ltd. Electricity sales 25,762 29,209 26,266 YeongGwang Yaksu Wind Electric Co., Ltd. Electricity sales 11,729 7,382 6,776 Taebaek Gadeoksan Wind Power Co., Ltd. Electricity sales 16,360 25,880 34,940 Korea Energy Solutions Co., Ltd. Electricity sales —  102 128 STN Co., Ltd. (formerly, Structure test network Co., Ltd.) Others —  —  10 Green Energy Electricity Generation Co., Ltd. Electricity sales 1,238 2,962 948 Namjeongsusang Solar Power Operation Co., Ltd. (*3) Electricity sales 14,286 9,491 —  Bitgoel Eco Energy Co., Ltd. Service and others —  930 28,334 Jeju Gimnyeong Wind Power Co., Ltd. Electricity sales 12,833 12,364 8,635 Seoroseoro Sunny Power Plant Co., Ltd. REC and others 217 1,138 874 Muan Solar Park Co., Ltd. REC and others 31,017 17,052 16,554 YuDang Solar Co., Ltd. REC and others 3,495 1,915 1,860 Anjwa Smart Farm & Solar City Co., Ltd. Electricity sales 24,601 16,942 17,332 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Others —  42,651 62,212 Saemangeum Heemang Photovoltaic Co., Ltd. Electricity sales —  1,039 440 G.GURU Co., Ltd. Electricity sales —  452 —  Purchase and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> UD4M Co., Ltd. Electricity sales ￦ — 313 117 Dongbu Highway Solar Co., Ltd. Electricity sales 2,605 3,516 2,937 Seobu Highway Solar Co., Ltd. Electricity sales 2,963 3,452 2,880 REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) Interest income/ — — 6 Green Radiation Co., Ltd. Ordinary —  —  11 Gwangbaek Solar Power Investment Co., Ltd. Electricity sales 742 602 565 Go deok Clean Energy Co., Ltd. Electricity sales — — 11,545 PlatformN. Co., Ltd. Others — 475 — Muan Sunshine Solar Power Plant Co., Ltd. Electricity sales 15,900 19,514 16,328 Gangneung Sacheon Fuel Cell Co., Ltd. Electricity sales — — 1,324 11 Associates (Overseas) Electricity sales 502 101,790 91,233 <Joint ventures> Seobusambo highway photovoltaics Co., Ltd. Electricity sales — 103 502 Cheongna Energy Co., Ltd. Service 57 80 60 Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Service 5,409 13,872 8,151 Daegu Green Power Co., Ltd. Electricity sales 289,052 508,601 370,787 KAPES, Inc. Commission 64,140 9,306 19,112 Honam Wind Power Co., Ltd. Electricity sales 4,807 7,662 8,643 Jeongam Wind Power Co., Ltd. Electricity sales 3,145 — — Korea Power Engineering Service Co., Ltd. Service 1,315 830 812 Seokmun Energy Co., Ltd. Service 44,315 60,799 60,009 Chun-cheon Energy Co., Ltd. Electricity sales 327,536 585,689 585,656 Yeonggwangbaeksu Wind Power Co., Ltd. Electricity sales 9,471 13,990 17,228 Yeonggwang Wind Power Co., Ltd. Electricity sales 21,004 31,221 40,605 Western Power Changgi Solar Co., Ltd. Electricity sales 5,852 — — KW Nuclear Components Co., Ltd. Service 96 9,504 14,114 Taebaek Wind Power Co., Ltd. (*1) Service — — 7,476 Pyeongchang Wind Power Co., Ltd. Electricity sales — — 3,542 Busan Shinho Solar Power Co., Ltd. Electricity sales 7,895 10,601 10,248 Global Trade Of Power System Co., Ltd. Service 323 715 223 Expressway Solar-light Power Generation Co., Ltd. Electricity sales 3,146 4,016 3,362 Goheung New Energy Co., Ltd. Electricity sales — —  5,264 Gunsan Land Solar Co., Ltd. Electricity sales — 533 486 Daesan Green Energy Co., Ltd. Electricity sales 146,776 129,736 139,721 Cheong-Song Noraesan Wind Power Co., Ltd. Electricity sales — 980 882 Saemangeum Solar Power Co., Ltd. Electricity sales 5 1 — Dangjin Eco Power Co., Ltd. Electricity sales 4,139 5,696 5,583 Yangyang Wind Power Co., Ltd. Service and — — 10 Energyco Co., Ltd. Electricity sales — 7,898 6,539 Purchase and others Company name Transaction type 2021 2022 2023 In millions of won <Associates> Hapcheon Floating Photovoltaic Power Plant Inc. Service and REC — 2,526 — Busan Industrial Solar Power Co., Ltd. Electricity sales 2,815 4,575 3,656 Bitsolar Energy Co., Ltd. Electricity sales 5,703 13,030 12,946 Omisan Wind Power Co., Ltd. Electricity sales 7 — — Haemodum Solar Co., Ltd. Electricity sales 1,625 2,168 402 Yeongam Solar Power Co., Ltd. Electricity sales 47,805 44,745 34,981 Samsu Wind Power Co., Ltd. Electricity sales 2,800 10,605 8,269 Solaseado Solar Power Co., Ltd. Electricity sales 31,031 28,698 18,259 Gurae Resident Power Co., Ltd. Electricity sales — — 1 Cheongju Eco Park Co., Ltd. Electricity sales — 94,409 95,059 Enel X Midland Photovoltaic, LLC Electricity sales — 1,871 2,431 Eumseong Eco Park Co., Ltd. Electricity sales — — 27,765 41 Joint ventures (Overseas) Electricity sales 54,135 16,859 17,222 <Others> Korea Development Bank Interest expense 2,756 4,208 5,559 Dividends paid 256,862 12 — (*1) Taebaek Wind Power Co., Ltd. was changed from an associate to a joint venture for the year ended December 31, 2023. (*2) KEPCO-Uhde Inc. is not a related party of the Company as of December 31, 2023 as the liquidation process was completed for the year ended December 31, 2023. (*3) Namjeongsusang Solar Power Operation Co., Ltd. is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2023. (*4) Changjuk Wind Power Co., Ltd. was reclassified from an associate to a subsidiary for the year ended December 31, 2022, and the amount is before reclassification to a subsidiary. (*5) Korea Electric Vehicle Charging Service is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2022.
Summary of Receivables and Payables Arising From Related Party Transactions	(4) Receivables and payables arising from related party transactions as of December 31, 2022 and 2023 are as follows: Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Associates> Korea Gas Corporation Trade receivables ￦ 12,415 14,671 —  —  Non-trade receivables and others 54,232 12,513 —  —  Trade payables —  —  1,882,607 480,974 Non-trade payables and others —  —  1,294 1,378 Goseong Green Power Co., Ltd. Trade receivables 76,254 55,719 —  —  Non-trade 14 15 —  —  Trade payables —  —  182,095 120,270 Non-trade —  —  52,515 48,621 Dongducheon Dream Power Co., Ltd. Trade receivables 592 2,573 —  —  Non-trade 270 478 —  —  Trade payables —  —  293,256 117,975 Saemangeum Sebit Power Plant Co., Ltd. Non-trade 653 341 — —  Daejung Offshore Wind Power Co., Ltd. Non-trade 123 263 —  —  Daegu Photovoltaic Co., Ltd. Trade payables —  —  135 105 Non-trade —  —  2 —  Korea Electric Power Industrial Trade receivables 164 176 —  —  Development Co., Ltd. Non-trade 2 —  —  —  Trade payables —  —  150 2,021 Non-trade —  —  9,588 8,077 Gangneung Eco Power Co., Ltd. Trade receivables 19,364 59,623 —  —  Non-trade 478 —  —  —  Non-trade —  —  94 94 Shin Pyeongtaek Power Co., Ltd. Trade receivables 7,375 1,814 —  —  Non-trade 1,068 4,933 —  —  Trade payables —  —  109,274 86,801 Non-trade —  —  101 385 Noeul Green Energy Co., Ltd. Trade receivables 3 6 —  —  Non-trade 9,365 18,356 —  —  Non-trade —  —  2,468 3,005 Samcheok Eco Materials Co., Ltd. Trade receivables 46 33 —  —  YTN Co., Ltd. Trade receivables 112 133 —  —  Busan Green Energy Co., Ltd. Trade receivables 1 1 —  —  Non-trade 26,681 32,720 —  —  Non-trade —  —  4,415 3,642 Gunsan Bio Energy Co., Ltd.(*4) Non-trade 11,728 —  —  — Yaksu ESS Co., Ltd. Trade payables —  —  —  538 Gangwon Wind Power Co., Ltd. Trade receivables 6 13 —  —  Trade payables —  —  5,197 3,206 Gwangyang Green Energy Co., Ltd. Trade receivables —  1,069 —  —  Non-trade receivables and others 1,436 716 —  —  Bigeum Resident Photovoltaic Power Co., Ltd. Trade receivables 343 406 —  —  Non-trade 516 1,316 —  —  Goesan Solar park Co., Ltd. Trade payables —  —  346 56 Hyundai Green Power Co., Ltd. Trade receivables 839 903 —  —  Korea Power Exchange Trade receivables 223 1,583 —  —  Non-trade —  1 —  —  Trade payables —  —  —  16,367 Non-trade —  —  2,405 2,520 Taebaek Wind Power Co., Ltd. Trade payables —  —  680 —  Non-trade —  —  178 —  Pyeongchang Wind Power Co., Ltd.(*1) Trade receivable 3 —  —  —  Non-trade payables and others —  —  211 —  Taebaek Guinemi Wind Power Co., Ltd. Trade payables —  —  885 572 Non-trade payables and others —  —  —  286 Daeryun Power Co., Ltd. Trade receivables 195 326 —  —  Trade payables —  —  55,725 32,140 GS Donghae Electric Power Co., Ltd. Trade receivables 872 159 —  —  Non-trade 1,558 169 —  —  Trade payables —  —  72,947 72,951 Non-trade —  —  14,565 125 Yeongyang Wind Power Corporation II Non-trade receivables and others —  165 —  —  KNH Solar Co., Ltd. Trade receivables 1 1 —  —  Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Associates> S-Power Trade receivables ￦ 77 213 —  —  Non-trade 44 53 —  —  Trade payables —  —  135,504 79,459 Non-trade —  —  11 —  PND Solar Co., Ltd. Trade payables —  —  210 296 Hyundai Eco Energy Co., Ltd. Trade receivables 22 28 —  —  Trade payables —  —  738 408 YeongGwang Yaksu Wind Electric Co., Ltd. Trade receivables 7 10 —  —  Non-trade receivables and others —  2,294 —  —  Trade payables —  —  589 828 Non-trade —  —  2,050 —  Taebaek Gadeoksan Wind Power Co., Ltd. Non-trade 97 1,539 —  —  Trade payables —  —  12,739 12,739 Non-trade —  —  5 7 Korea Energy Solutions Co., Ltd. Non-trade —  —  94 —  Green Energy Electricity Generation Co., Ltd. Trade payables —  —  —  62 Non-trade —  —  —  45 Namjeongsusang Solar Power Operation Co., Ltd. (*3) Trade receivables 2 —  —  —  Bitgoel Eco Energy Co., Ltd. Non-trade 6 131 —  —  Trade payables —  —  —  6,226 Non-trade —  —  1,023 —  Jeju Gimnyeong Wind Power Co., Ltd. Non-trade 130 112 —  —  Trade payables —  —  1,758 1,467 Non-trade —  —  —  9 Muan Solar Park Co., Ltd. Trade receivables 25 —  —  —  Non-trade 9 4 —  —  Anjwa Smart Farm & Solar City Co., Ltd. Non-trade —  —  921 1,296 KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Trade receivables 1 1 —  —  Trade payables —  —  5,485 5,485 Saemangeum Heemang Photovoltaic Co., Ltd. Non-trade 3,435 —  —  —  Non-trade —  —  1 —  Dongbu Highway Solar Co., Ltd. Trade receivables 1 1 —  —  Trade payables —  —  2 —  Non-trade —  —  2 —  Seobu Highway Solar Co., Ltd. Trade receivables 1 1 —  —  Trade payables —  —  8 —  Non-trade —  —  3 —  Gwangbaek Solar Power Investment Co., Ltd. Non-trade —  —  61 —  Go deok Clean Energy Co., Ltd. Non-trade —  4,562 —  —  Non-trade —  —  —  5,288 Suwon New Power Co., Ltd. Trade receivables —  876 —  —  Non-trade 1,280 560 —  —  Tronix Co., Ltd. Non-trade 1 —  —  —  KOSTURE Co., Ltd. Trade receivables 6 —  —  —  Muan Sunshine Solar Power Plant Co., Ltd. Trade payables —  —  3,076 1,440 Non-trade —  —  1,265 —  PlatformN. Co., Ltd. Non-trade —  —  232 —  9 Associates (Overseas) Trade receivables 93 —  —  —  Non-trade 49,409 77,814 —  —  Non-trade —  —  502 6,242 <Joint ventures> Daegu Green Power Co., Ltd. Trade receivables 53 122 —  —  Non-trade 56 55 66,715 32,222 Trade payables —  —  Seobusambo highway photovoltaics Co., Ltd. Trade receivables —  1 —  —  Non-trade —  4 —  —  Yangyang Suri Wind Power Co., Ltd. Non-trade receivables and others —  55 —  —  KAPES, Inc. Trade receivables 2 4 —  —  Non-trade —  89 —  —  Non-trade —  —  106 3,791 Honam Wind Power Co., Ltd. Trade payables —  —  515 515 Korea Power Engineering Service Co., Ltd. Non-trade 47 48 —  —  Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Joint ventures> Non-trade ￦ —  —  77 76 Seokmun Energy Co., Ltd. Trade receivables 67 44 —  —  Non-trade 113 199 —  —  Trade payables —  —  7,000 7,000 Naepo Green Energy Co., Ltd. Trade receivables 169 190 —  —  Non-trade —  1 —  —  Non-trade —  —  3 —  Chun-cheon Energy Co., Ltd. Trade receivables 124 239 —  —  Non-trade 165 165 —  —  Trade payables —  —  79,117 79,117 Non-trade payables and others —  —  —  2 Yeonggwangbaeksu Wind Power Co., Ltd. Trade receivables 8 10 —  —  Non-trade 166 —  —  —  Trade payables —  —  1,076 1,076 Cheongna Energy Co., Ltd. Trade receivables 17,324 13,898 —  —  Non-trade 1,654 2,160 —  —  Non-trade —  —  1 1 Yeonggwang Wind Power Co., Ltd. Trade receivables 12 15 —  —  Non-trade 62 56 —  —  Trade payables —  —  2,251 2,251 KW Nuclear Components Co., Ltd. Trade receivables 4 —  —  —  Non-trade 18 17 —  —  Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Trade receivables 79 84 —  —  Non-trade 10,218 10,779 —  —  Trade payables —  —  1,027 721 Non-trade —  —  9,119 14,193 Taebaek Wind Power Co., Ltd. (*1) Trade payables —  —  —  603 Non-trade —  —  —  341 Pyeongchang Wind Power Co., Ltd. Trade receivables —  4 —  —  KEPCO-Uhde Inc. (*2) Non-trade —  —  10 —  Busan Shinho Solar Power Co., Ltd. Trade receivables 3 3 —  —  Trade payables —  —  304 304 Expressway Solar-light Power Generation Co., Ltd. Trade payables —  —  166 220 Gunsan Land Solar Co., Ltd. Non-trade 138 295 —  —  Daesan Green Energy Co., Ltd. Trade receivables 18 13 —  —  Non-trade 218 170 —  —  Trade payables —  —  4,946 4,946 Cheong-Song Noraesan Wind Power Co., Ltd. Trade receivables 2 2 —  —  Saemangeum Solar Power Co., Ltd. Non-trade 4,368 4,368 —  —  Dangjin Eco Power Co., Ltd. Trade receivables 3 4 —  —  Trade payables —  —  222 222 Non-trade —  —  105 176 Yangyang Wind Power Co., Ltd. Non-trade —  13 —  —  Energyco Co., Ltd. Non-trade —  3 —  —  Trade payables —  —  —  99 Hapcheon Floating Photovoltaic Power Plant Inc. Trade receivables 9 10 —  —  Non-trade —  68 —  —  Busan Industrial Solar Power Co., Ltd. Trade receivables 2 2 —  —  Bitsolar Energy Co., Ltd. Non-trade 222 1 —  —  Trade payables —  —  201 201 Haemodum Solar Co., Ltd. Trade receivables 1 1 —  —  Yeongam Solar Power Co., Ltd. Trade receivables 44 56 —  —  Trade payables —  —  3,655 3,517 Samsu Wind Power Co., Ltd. Trade payables —  —  1,303 1,229 Solaseado Solar Power Co., Ltd. Non-trade 23 24 —  —  Non-trade —  —  2,911 —  Cheongju Eco Park Co., Ltd. Trade receivables —  6,899 —  —  Trade payables —  —  7,994 7,994 Enel X Midland Photovoltaic, LLC Trade receivables 1 1 —  —  Trade payables —  —  3 144 Non-trade —  —  —  49 Geumsungsan Wind Power Co., Ltd. Trade receivables 3 4 —  —  Non-trade —  —  1 —  Receivables Payables Company name Type 2022 2023 2022 2023 In millions of won <Joint ventures> 26 Joint ventures (Overseas) Trade receivables ￦ 73,805 160,474 —  —  Non-trade 71,661 55,897 —  —  Non-trade —  —  117,754 22,877 <Others> Korea Development Bank Accrued interest income 5 —  —  —  Non-trade 30,836 33,140 —  —  Non-trade —  —  101 147 Derivatives and others 67,662 45,898 3,759 72,050 KEPCO Lebanon SARL (*5) Trade receivables —  75 —  —  (*1) Taebaek Wind Power Co., Ltd. was changed from an associate to a joint venture for the year ended December 31, 2023. (*2) KEPCO-Uhde Inc. is not a related party of the Company as of December 31, 2023 as the liquidation process was completed for the year ended December 31, 2023. (*3) Namjeongsusang Solar Power Operation Co., Ltd. is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2023. (*4) Busan Green Energy Co., Ltd. was declared bankrupt for the year ended December 31, 2023 and was excluded from an associate due to the appointment of a bankruptcy trustee. (*5) The entire amount has been set as bad debt.
Summary of Loans and Others Arising From Related Party Transaction	(5) Loans and others arising from related party transactions as of December 31, 2022 and 2023 are as follows: Type Company name Beginning Loans Collection Others Ending balance In millions of won Associates KNOC Nigerian East Oil Co., Ltd., KNOC Nigerian West Oil Co., Ltd. ￦ 31,473 170 —  510 32,153 (Allowance for doubtful accounts) (10,751 ) (12,995 ) —  (1,797 ) (25,543 ) Associates Nepal Water & Energy Development Company Private Limited 19,914 —  —  (1,862 ) 18,052 Associates Xe-Pian Xe-Namnoy 22,936 —  —  401 23,337 Associates PT Wampu Electric Power 9,171 —  (9,613 ) 442 —  Associates PT. Cirebon Energi Prasarana 29,569 —  —  5,973 35,542 Associates Bigeum Resident Photovoltaic Power Co., Ltd. 11,212 —  —  (1,687 ) 9,525 Associates Daejung Offshore Wind Power Co., Ltd. 1,000 —  —  —  1,000 Associates Bitgoel Eco Energy Co., Ltd. 34,790 —  (3,905 ) —  30,885 Associates Saemangeum Sebit Power Plant Co., Ltd. 37,249 —  (8,279 ) —  28,970 Joint ventures Solaseado Solar Power Co., Ltd. 35,000 —  —  —  35,000 Joint ventures Recursos Solares PV de Mexico II, S.A. de C.V. 8,457 1,944 —  188 10,589 Joint ventures Horus Solar, S.A. de C.V. 19,287 —  (8,552 ) 464 11,199 Joint ventures Sunmex Renovables, S.A. de C.V. 16,383 536 —  291 17,210 Joint ventures Kelar S.A. 43,965 —  —  (2,980 ) 40,985 Joint ventures DE Energia SpA 7,260 —  —  126 7,386 Joint ventures Daehan Wind Power PSC 14,618 —  —  254 14,872 Joint ventures Bitsolar Energy Co., Ltd. 3,165 —  —  —  3,165 Joint ventures Daesan Green Energy Co., Ltd. 3,514 190 (1,293 ) —  2,411 Joint ventures Yangyang Wind Power Co., Ltd. —  3,257 —  —  3,257 Type Company name Beginning Loans Collection Others Ending balance In millions of won Joint ventures Nghi Son 2 Power LLC ￦ 186,735 —  —  3,256 189,991 Joint ventures Pulau Indah Power Plant Sdn. Bhd. 10,207 —  —  (244 ) 9,963 Joint ventures Guadalupe Solar SpA 3,344 —  (225 ) 42 3,161 Joint ventures Foresight Iberian Solar Group Holding, S.L. 61,302 —  (1,292 ) 4,308 64,318 Joint ventures Capman Lynx SCA, SICAR 31,628 —  —  3,582 35,210 (Allowance for doubtful accounts) (4,467 ) (30,743 ) —  —  (35,210 ) Joint ventures S-Power 253 —  —  5 258 Others KEPCO Lebanon SARL 3,834 —  —  —  3,834 (Allowance for doubtful accounts) (3,834 ) —  —  —  (3,834 ) Gunsan Bio Energy Co., Ltd. (*1) 12,396 —  —  —  12,396 (Allowance for doubtful accounts) (12,396 ) —  —  —  (12,396 ) ￦  627,214 (37,641 ) (33,159 ) 11,272 567,686 (*1) Bankruptcy was declared during the year ended December 31, 2023. The Company cannot hold significant influence due to the appointment of a bankruptcy trustee, so the Company was reclassified from an associate to financial assets at fair value through other comprehensive income.
Summary of Borrowings Arising From Related Party Transactions	(6) Borrowings arising from related party transactions as of December 31, 2022 and 2023 are as follows: Related parties Type Beginning balance Borrowings Repayment Others Ending balance In millions of won Korea Development Bank Facility ￦ 96,584 —  (12,387 ) 906 85,103 Others 2,133 —  (375 ) —  1,758 Operating funds 62,433 478,394 (442,027 ) 21,200 120,000 Syndicated Loan 12,455 —  (978 ) (529 ) 10,948 EBL and others 48,892 25,701 (3,398 ) 37,017 108,212 ￦  222,497 504,095 (459,165 ) 58,594 326,021
Summary of Guarantees Provided To Associates Or Joint Ventures	(7) Guarantees provided to related parties as of December 31, 2023 are as follows: Primary guarantor Principal obligor Type of guarantees Credit limit Creditor In millions of won and thousands of foreign currencies Korea Electric Power Corporation Shuweihat Asia Operation & Maintenance Company Performance guarantees USD 11,000 Shuweihat Asia Power Investment B.V. Korea Electric Power Corporation Rabigh Operation & Maintenance Company Limited Performance guarantees and others USD 1,387 Rabigh Electricity Company Korea Electric Power Corporation Nghi Son 2 Power LLC Performance guarantees and others USD 40,738 SMBC Singapore and others Korea Electric Power Corporation Barakah One Company Debt guarantees USD 1,223,355 Export-Import Bank of Korea and others Performance guarantees and others USD 4,103,269 Korea Electric Power Corporation RE Holiday Holdings LLC Performance guarantees (*9) USD 222,077 EFS Renewables Holdings, LLC, CA-CIB Korea Electric Power Corporation RE Pioneer Holdings LLC Performance guarantees USD 106,873 EFS Renewables Holdings, LLC Korea Electric Power Corporation Rabigh Electricity Company Performance guarantees SAR 4,151 Hana Bank Korea Electric Power Corporation Shuweihat Asia Power Investment B.V. Performance guarantees USD 50,000 ING Bank Korea Electric Power Corporation Amman Asia Electric Power Company Performance guarantees USD 17,400 Shinhan Bank Korea Electric Power Corporation Horus Solar, S.A. de C.V. Other performance guarantees MXN 16,413 CENACE and others Primary guarantor Principal obligor Type of guarantees Credit limit Creditor In millions of won and thousands of foreign currencies Korea Electric Power Corporation Recursos Solares PV de Mexico II, S.A. de C.V. Other performance guarantees MXN 1,518 SEMARNAT USD 393 CFE Transmission Korea Electric Power Corporation Sunmex Renovables, S.A. de C.V. Other performance guarantees USD 9,078 CENACE MXN 3,666 SEMARNAT Korea Electric Power Corporation International Offshore Power Transmission Holding Company Limited Performance guarantees USD 52,500 Mizuho Bank Other performance guarantees USD 7,000 Credit Agricole Korea Electric Power Corporation Pulau Indah Power Plant Sdn. Bhd. Collateralized money invested (*10) KRW 13,210 Malaysian Trustee Berhad Korea Electric Power Corporation KEPCO for Power Company Debt guarantees USD 60,000 Riyad bank Other performance guarantees USD 70,000 SMBC Seoul and others Korea Western Power Co., Ltd. Cheongna Energy Co., Ltd. Collateralized money invested KRW 25,549 Kookmin Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd. Xe-Pian Xe-Namnoy Collateralized money invested KRW 116,378 Krung Thai Bank Impounding bonus guarantees (*11) USD 5,000 SK Eco Plant Co., Ltd. Korea Western Power Co., Ltd. Rabigh Operation & Maintenance Company Limited Performance guarantees and others SAR 11,200 National Bank of Kuwait Korea Western Power Co., Ltd. Daegu Photovoltaic Co., Ltd. Collateralized money invested KRW 2,804 Korea Development Bank Korea Western Power Co., Ltd. Dongducheon Dream Power Co., Ltd. Collateralized money invested (*5) KRW 50,682 Kookmin Bank and others Debt guarantees KRW 20,300 Hanyang Securities Korea Western Power Co., Ltd. PT. Mutiara Jawa Collateralized money invested KRW 5,168 Woori Bank Korea Western Power Co., Ltd. Haeng Bok Do Si Photovoltaic Power Co., Ltd. Collateralized money invested KRW 294 Nonghyup Bank Korea Western Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd. Collateralized money invested KRW 145,025 Kookmin Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd. Haemodum Solar Co., Ltd. Collateralized money invested KRW 3,122 Nonghyup Bank Korea Western Power Co., Ltd. Muan Solar Park Co., Ltd. Collateralized money invested KRW 6,830 IBK and others Korea Western Power Co., Ltd. Anjwa Smart Farm & Solar City Co., Ltd. Collateralized money invested KRW 7,665 Hana Bank and others Korea Western Power Co., Ltd. Seoroseoro Sunny Power Plant Co., Ltd. Collateralized money invested KRW 941 Hana Bank and others Korea Western Power Co., Ltd. YuDang Solar Co., Ltd. Collateralized money invested KRW 570 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd. Hapcheon Floating Photovoltaic Power Plant Inc. Collateralized money invested KRW 10,348 Nonghyup Bank and others Korea Western Power Co., Ltd. Yeongwol Eco Wind Co., Ltd. Collateralized money invested KRW 4,024 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd. Gurae Resident Power Co., Ltd. Collateralized money invested KRW 569 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd Gunsan Land Solar Co., Ltd. Collateralized money invested KRW 22,429 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd Seobusambo highway photovoltaics Co., Ltd. Collateralized money invested KRW 3,580 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea Western Power Co., Ltd Eumseong Eco Park Co., Ltd. Collateralized money invested KRW 8,386 Kyobo Life Insurance Co., Ltd. and others Korea Western Power Co., Ltd PungBack Wind Farm Corporation Collateralized money invested KRW 7,940 Hanwha Life Insurance Co., Ltd. and others Korea Western Power Co., Ltd Wadi Noor Solar Power Company SAOC Loan payment guarantee USD 54,855 DBS Bank Korea East-West Power Co., Ltd. Busan Shinho Solar Power Co., Ltd. Collateralized money invested KRW 6,669 Korea Development Bank and others Korea East-West Power Co., Ltd. Seokmun Energy Co., Ltd. Collateralized money invested KRW 16,591 Kookmin Bank and others Guarantees for supplemental funding (*1) —  Korea East-West Power Co., Ltd. Chun-cheon Energy Co., Ltd. Collateralized money invested KRW 35,083 Kookmin Bank and others Guarantees for supplemental funding (*1) KRW 90,800 Korea East-West Power Co., Ltd. Honam Wind Power Co., Ltd. Collateralized money invested KRW 4,743 Shinhan Bank and others Korea East-West Power Co., Ltd. GS Donghae Electric Power Co., Ltd. Collateralized money invested KRW 259,084 Korea Development Bank and others Korea East-West Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd. Collateralized money invested KRW 3,443 Kookmin Bank and others Korea East-West Power Co., Ltd. Yeonggwang Wind Power Co., Ltd. Collateralized money invested KRW 23,380 KDB Capital Corporation and others Primary guarantor Principal obligor Type of guarantees Credit limit Creditor In millions of won and thousands of foreign currencies Korea East-West Power Co., Ltd. Daesan Green Energy Co., Ltd. Collateralized money invested KRW 22,191 IBK Guarantees for supplemental funding (*1) —  Korea East-West Power Co., Ltd. Taebaek Gadeoksan Wind Power Co., Ltd. Collateralized money invested KRW 19,426 Hana Bank and others Korea East-West Power Co., Ltd. PT. Tanjung Power Indonesia Other guarantees USD 3,150 PT. Adaro Indonesia Guarantees for supplemental funding (*1) —  Sumitomo mitsui banking and others Collateralized money invested KRW 90,151 MUFG and others Korea East-West Power Co., Ltd. South Jamaica Power Company Limited Performance guarantees (*14) USD 14,400 Hana Bank Collateralized money invested KRW 43,109 JCSD Trustee Services Limited and others Korea East-West Power Co., Ltd. DE Energia SpA Collateralized money invested KRW 9,703 Mirae Asset Securities Co., Ltd. and others Collateralized loans USD 5,728 Payment guarantees (*7) USD 959 Hana Bank Korea East-West Power Co., Ltd. Bitsolar Energy Co., Ltd. Collateralized money invested KRW 352 Mirae Asset Life Insurance Co., Ltd. and others Korea East-West Power Co., Ltd. Cheongju Eco Park Co., Ltd. Collateralized money invested KRW 9,072 Kyobo Life Insurance Co., Ltd. and others Korea East-West Power Co., Ltd. Busan Industrial Solar Power Co., Ltd. Collateralized money invested KRW 1,058 Shinhan Bank and others Korea East-West Power Co., Ltd. Yangyang Wind Power Co., Ltd. Collateralized money invested KRW 10,435 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea East-West Power Co., Ltd. KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) Collateralized money invested KRW 7,779 Hana Bank and others Korea East-West Power Co., Ltd. Goheung New Energy Co., Ltd. Collateralized money invested KRW 4,808 Woori Bank and others Korea East-West Power Co., Ltd. Seungmun Green Energy Collateralized money invested KRW 9,757 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea East-West Power Co., Ltd. Yanggu Floating Photovoltaic Power Plant Inc. Collateralized money invested KRW 760 Korea Development Bank Korea East-West Power Co., Ltd. Hoenggye Renewable Energy Co., Ltd. Collateralized money invested Guarantees for supplemental funding (*1) KRW 2,375 —  IBK Korea Southern Power Co., Ltd. KNH Solar Co., Ltd. Collateralized money invested KRW 3,194 Shinhan Bank and others Performance guarantees and guarantees for supplemental funding (*1) —  Korea Southern Power Co., Ltd. Daeryun Power Co., Ltd. Collateralized money invested KRW 26,834 Korea Development Bank and others Korea Southern Power Co., Ltd. Daegu Green Power Co., Ltd. Collateralized money invested KRW 26,430 Shinhan Bank and others Performance guarantees —  Korea Southern Power Co., Ltd. Kelar S.A. Performance guarantees USD 33,930 Hana Bank, MUFG Payment guarantees (*12) USD 11,707 Hana Bank Korea Southern Power Co., Ltd. Daehan Wind Power PSC Performance guarantees USD 1,800 Shinhan Bank Payment guarantees (*6) USD 2,000 Hana Bank Collateralized money invested KRW 16,426 Standard Chartered Korea Southern Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Collateralized money invested KRW 12,228 Woori Bank, Shinhan Bank and others Performance guarantees —  Korea Southern Power Co., Ltd. Taebaek Guinemi Wind Power Co., Ltd. Collateralized money invested KRW 13,530 IBK Korea Southern Power Co., Ltd. Samcheok Eco Materials Co., Ltd. Payment guarantees (*2) —  SEM Investment Co., Ltd. Performance guarantees (*15) —  Korea Southern Power Co., Ltd. Solaseado Solar Power Co., Ltd. Collateralized money invested KRW 13,370 Kookmin Bank and others Korea Southern Power Co., Ltd. Naepo Green Energy Co., Ltd. Collateralized money invested (*8) KRW 5,285 IBK and others Performance guarantees and guarantees for supplemental funding (*1) KRW 30,000 Korea Southern Power Co., Ltd Omisan Wind Power Co., Ltd. Collateralized money invested KRW 10,229 Shinhan Bank Performance guarantees and guarantees for supplemental funding (*1) —  Korea Southern Power Co., Ltd. Geumsungsan Wind Power Co., Ltd. Collateralized money invested KRW 5,515 Kookmin Bank Korea Southern Power Co., Ltd. HORANG ENERGY Inc. Collateralized money invested KRW 4,149 Woori Bank and others Guarantees for supplemental funding (*1) —  Korea Southern Power Co., Ltd. Haman Green Energy Co., Ltd. Collateralized money invested KRW 2,981 Hana Bank and others Guarantees for supplemental funding (*1) —  Primary guarantor Principal obligor Type of guarantees Credit limit Creditor In millions of won and thousands of foreign currencies Korea Southern Power Co., Ltd. Jeongeup Green Power Co., Ltd. Collateralized money invested KRW 1,560 Woori Bank and others Guarantees for supplemental funding (*1) —  KOSPO Power Services Ltda. Kelar S.A. Payment guarantees USD 1,316 Scotia bank KOSPO Chile SpA Kelar S.A. Collateralized money invested KRW 131,529 Export-Import Bank of Korea and others KOSPO Chile SpA Chester Solar I SpA Collateralized money invested KRW 1,238 IBK KOSPO Chile SpA Chester Solar IV SpA Collateralized money invested KRW 484 IBK KOSPO Chile SpA Chester Solar V SpA Collateralized money invested KRW 191 IBK KOSPO Chile SpA Diego de Almagro Solar SpA Collateralized money invested KRW 954 IBK KOSPO Chile SpA Laurel SpA Collateralized money invested KRW 613 IBK Korea Midland Power Co., Ltd. YeongGwang Yaksu Wind Electric Co., Ltd. Collateralized money invested KRW 133 IBK and others Korea Midland Power Co., Ltd. Hyundai Green Power Co., Ltd. Collateralized money invested KRW 118,172 Korea Development Bank and others Korea Midland Power Co., Ltd. PT. Cirebon Electric Power Debt guarantees USD 3,355 Mizuho Bank Korea Midland Power Co., Ltd. PT Wampu Electric Power Debt guarantees USD 5,473 PT. Bank KB Bukopin Korea Midland Power Co., Ltd. Green Energy Electricity Generation Co., Ltd. Collateralized money invested KRW 8 IBK Guarantees for supplemental funding (*1) —  IBK and others Korea Midland Power Co., Ltd. Yaksu ESS Co., Ltd. Collateralized money invested KRW 285 IBK Korea Midland Power Co., Ltd. Gwangbaek Solar Power Investment Co., Ltd. Collateralized money invested KRW 5,155 Kyobo Life Insurance Co., Ltd. and others Korea Midland Power Co., Ltd. Muan Sunshine Solar Power Plant Co., Ltd. Collateralized money invested KRW 2,822 IBK Korea Midland Power Co., Ltd. Goesan Solar park Co., Ltd. Collateralized money invested KRW 2,877 IBK Korea Midland Power Co., Ltd Bitgoel Eco Energy Co., Ltd. Collateralized money invested KRW 7,328 IBK and others Guarantees for supplemental funding (*1) —  Korea Midland Power Co., Ltd. Energyco Co., Ltd. Collateralized money invested KRW 2,140 Nonghyup Bank Payment guarantees KRW 2,700 Shinhan bank Korea Midland Power Co., Ltd. Jeju Gimnyeong Wind Power Co., Ltd. Collateralized money invested KRW 246 Nonghyup Bank Korea Midland Power Co., Ltd. Dongbu Highway Solar Co., Ltd. Collateralized money invested KRW 380 Shinhan Bank Korea Midland Power Co., Ltd. Seobu Highway Solar Co., Ltd. Collateralized money invested KRW 406 Shinhan Bank Korea Midland Power Co., Ltd. Yeongyang Wind Power Corporation II Collateralized money invested KRW 10,100 Korea Development Bank and others Korea Midland Power Co., Ltd. Haeparang Energy Co., Ltd. Collateralized money invested KRW 2,104 Templeton hana asset management Co. Ltd. Guarantees for supplemental funding (*1) —  Korea Midland Power Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd. Collateralized money invested Guarantees for supplemental funding (*1) KRW 27,762 —  IBK and others Korea Midland Power Co., Ltd. Yeomsubong Wind Power Co., Ltd. Collateralized money invested KRW 871 Korea Development Bank Guarantees for supplemental funding (*1) —  Korea South-East Power Co., Ltd. Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Collateralized money invested (*3) —  IBK Guarantees for supplemental funding and others (*1,4) KRW 76,800 NH investment & securities Co., Ltd. and others Korea South-East Power Co., Ltd. RES Technology AD Collateralized money invested KRW 14,383 UniCredit Bulbank and others Korea South-East Power Co., Ltd. ASM-BG Collateralized money invested KRW 14,739 UniCredit Bulbank and others Korea South-East Power Co., Ltd. Expressway Solar-light Power Generation Co., Ltd. Collateralized money invested (*1) KRW 5,187 Woori Bank Korea South-East Power Co., Ltd. Goseong Green Power Co., Ltd. Collateralized money invested KRW 287,624 Kyobo Life Insurance Co., Ltd. and others Korea South-East Power Co., Ltd. Gangneung Eco Power Co., Ltd. Collateralized money invested KRW 254,929 Kyobo Life Insurance Co., Ltd. and others Korea South-East Power Co., Ltd. PND Solar Co., Ltd. Collateralized money invested KRW 1,510 IBK Korea South-East Power Co., Ltd. Hyundai Eco Energy Co., Ltd. Collateralized money invested KRW 7,947 Samsung Life Insurance and others Korea South-East Power Co., Ltd. Jaeun Resident Wind Power Plant Co., Ltd. Collateralized money invested KRW 2,214 IBK Primary guarantor Principal obligor Type of guarantees Credit limit Creditor In millions of won and thousands of foreign currencies Korea South-East Power Co., Ltd. Chungsongmeon BongSan wind power Co., Ltd. Collateralized money invested KRW 2,665 Kyobo Life Insurance Co., Ltd. and others Korea South-East Power Co., Ltd. Yeongam Solar Power Co., Ltd. Collateralized money invested KRW 9,637 Kookmin Bank and others Korea South-East Power Co., Ltd. Samsu Wind Power Co., Ltd. Collateralized money invested KRW 3,022 Shinhan Bank and others Korea South-East Power Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd. Collateralized money invested KRW 14,420 Woori Bank and others Korea South-East Power Co., Ltd. Nepal Water & Energy Development Company Private Limited Collateralized money invested USD 97,105 International Finance Corporation and others Business reserve payment guarantee USD 33,333 Korea Hydro & Nuclear Power Co., Ltd. Noeul Green Energy Co., Ltd. Collateralized money invested —  Hana Bank and others Korea Hydro & Nuclear Power Co., Ltd. Busan Green Energy Co., Ltd. Collateralized money invested KRW 3,260 Shinhan Bank and others Korea Hydro & Nuclear Power Co., Ltd. Go deok Clean Energy Co., Ltd. Collateralized money invested KRW 4,722 Kookmin Bank and others Korea Hydro & Nuclear Power Co., Ltd. Cheong-Song Noraesan Wind Power Co., Ltd. Collateralized money invested KRW 3,755 Woori Bank and others Korea Hydro & Nuclear Power Co., Ltd. Gwangyang Green Energy Co., Ltd. Collateralized money invested KRW 24,638 Shinhan Bank and others Korea Hydro & Nuclear Power Co., Ltd. Gangneung Sacheon Fuel Cell Co., Ltd. Collateralized money invested KRW 7,869 Hana Bank and others Korea Hydro & Nuclear Power Co., Ltd Chuncheon Green Energy Co., Ltd. Collateralized money invested KRW 8,901 Hana Bank and others Guarantees for supplemental funding (*1) —  Korea Hydro & Nuclear Power Co., Ltd. Yangyang Suri Wind Power Co., Ltd. Collateralized money invested KRW 9,608 Kookmin Bank and others Korea Hydro & Nuclear Power Co., Ltd. Bigeum Resident Photovoltaic Power Co., Ltd. Collateralized money invested —  Kookmin Bank and others Korea Hydro & Nuclear Power Co., Ltd. Songsan Green Energy Co., Ltd. Collateralized money invested KRW 8,323 Hana Bank Korea Hydro & Nuclear Power Co., Ltd. Changwon Nu-ri Energy Co., Ltd. Collateralized money invested KRW 8,026 Hana Bank Korea Hydro & Nuclear Power Co., Ltd. KAS INVESTMENT I LLC Payment guarantees (*13) USD 9,770 WOORI AMERICA BANK Korea Hydro & Nuclear Power Co., Ltd. KAS INVESTMENT II LLC Payment guarantees (*13) USD 9,730 WOORI AMERICA BANK (*1) The Company guarantees to provide supplemental funding for business with respect to excessive business expenses or insufficient repayment of borrowings. (*2) Samcheok Eco Materials Co., Ltd., an associate of the Company has issued the hybrid bonds. If the bonds are not repaid by December 8, 2026, the parent company and shareholders except the parent company must purchase the bonds from the acquirer. As of December 31, 2023, derivative liabilities of W18,753 million (*3) The Company recognized an impairment loss on all of the equity securities of Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) before the prior year, and the acquisition cost of the securities provided as collateral is ￦47,067 million. (*4) Pursuant to the guarantee agreement, the Company recognized other provisions of ￦8,418 million as the possibility of economic benefit outflow to fulfill the obligation was deemed probable and the amount could be reasonably estimated. (*5) The common stocks of Dongducheon Dream Power Co., Ltd. held by the Company were pledged as collateral. (*6) The Company provided a payment guarantee to Jordan Tafila wind power project for opening L/C for Debt Service Reserve Account (DSRA). (*7) This includes a guarantee related to L/C for debt repayment allowance provided to DE Energia SpA, a joint venture of the Company. (*8) The Company recognized an impairment loss on all of the equity securities of Naepo Green Energy Co., Ltd. before the prior year, and the acquisition cost of the securities provided as collateral is ￦29,200 million. (*9) The credit limits of guarantees to RE Holiday Holdings LLC include the credit limits of guarantees to their subsidiaries. (*10) The Company, together with other shareholders, has provided a guarantee for the project financing of Pulau Indah Power Plant Sdn. Bhd., by establishing the right of pledge on the shares of Pulau Indah Power Plant Sdn. Bhd. (*11) Xe-Pian Xe-Namnoy Power Co., Ltd., an associate of the Company, has entered a contract to pay an incentive type of impounding bonus to SK Eco Plant Co., Ltd. when the Xe-Pian Xe-Na-mnoy Dam is completed. If Xe-Pian Xe-Namnoy Power Co., Ltd. fails to pay SK Eco Plant Co., Ltd., the Company guarantees the payment, and the amount is USD 5,000 thousand (*12) The Company provided a payment guarantee to Chile Kelar project for opening L/C for Debt Service Reserve Account (DSRA), and others. (*13) The credit limits of guarantees to KAS INVESTMENT I LLC, KAS INVESTMENT II LLC include the credit limits of guarantees to their subsidiaries. (*14) This is an L/C opening guarantee for the performance of each contract in relation to the power sales contract and gas supply contract of South Jamaica Power Company Limited, a joint venture of the Company. (*15) The Company has entered into an agreement to settle and pay the estimated loss amount in case damages occur in relation to the fulfillment of the mandatory supply volume according to the mandatory supply agreement for coal ash.
Summary of Guarantees Received from Related Parties	(8) Guarantees received from related parties as of December 31, 2023 are as follows : Primary Guarantor Type of guarantees Credit limit KAPES, Inc. Defect guarantees ￦ 17,558 Performance guarantees 6,229 Advance payment guarantee 135,598
Summary of Derivatives Transactions With Related Parties	(9) Derivatives transactions with related parties as of December 31, 2023 are as follows: (i) Currency Swap Counterparty Contract Contract amounts Contract interest rate per annum Contract exchange rate (in won) Pay Receive Pay Receive In millions of won and thousands of foreign currencies except contract exchange rate information Korea Development Bank 2019~2024 ￦ 177,600 USD 150,000 1.24 % 2.50 % ￦ 1,184.00 2020~2025 241,320 USD 200,000 0.54 % 1.13 % 1,206.60 2021~2026 118,170 USD 100,000 1.11 % 1.13 % 1,181.70 2022~2026 283,820 USD 200,000 4.67 % 5.38 % 1,419.10 2022~2028 283,820 USD 200,000 5.12 % 5.50 % 1,419.10 2023~2026 256,000 USD 200,000 4.04 % 5.38 % 1,280.00 2015~2025 111,190 USD 100,000 2.62 % 3.25 % 1,111.90 2017~2027 111,610 USD 100,000 2.31 % 3.13 % 1,116.10 2018~2028 108,600 HKD 800,000 2.69 % 3.35 % 135.75 2019~2027 119,978 CHF 100,000 1.43 % 0.05 % 1,199.78 2021~2026 111,400 USD 100,000 0.93 % 1.25 % 1,114.00 2022~2027 262,000 USD 200,000 3.63 % 4.25 % 1,310.00 2020~2026 118,910 USD 100,000 0.61 % 1.00 % 1,189.10 2021~2026 114,230 USD 100,000 1.27 % 1.25 % 1,142.30 2022~2027 123,710 USD 100,000 3.41 % 3.63 % 1,237.10 2022~2025 128,560 USD 100,000 3.37 % 4.13 % 1,285.60 2020~2025 122,780 USD 100,000 0.93 % 1.75 % 1,227.80 2022~2025 252,360 USD 200,000 2.83 % 3.60 % 1,261.80 2023~2028 129,500 USD 100,000 3.85 % 4.88 % 1,295.00 (ii) Currency forward In millions of won and thousands of foreign currencies except contract exchange rate information Counterparty Contract date Maturity date Contract amounts Contract exchange rate Pay Receive Korea Development Bank 2023.12.20 2024.01.15 ￦ 10,383 USD 8,000 ￦ 1,297.90 2023.12.01 2024.01.15 14,303 USD 11,000 1,300.30 2023.12.15 2024.02.14 11,617 USD 9,000 1,290.80
Summary of Salaries and Other Compensations To The Key Members of Management of The Company	(10) The Company considers all standing directors of the Board who serve as executive officers responsible for planning, operations and/or control of business activities, as key management personnel, except a standing director who is a member of the Audit Committee. The Company recorded salaries and other compensations related to the key management personnel as follows: Type 2021 2022 2023 In millions of won Salaries ￦ 1,272 1,026 866 Retirement benefits 21 58 33 ￦      1,293      1,084      899

Statement of Cash Flows (Tables

Statement of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2023
Non Cash Transactions [Abstract]
Summary of Significant Non-cash Activities	(1) Significant non-cash Transactions 2021 2022 2023 In millions of won Transfer from construction-in-progress ￦ 12,902,589 13,723,972 10,090,726 Recognition of asset retirement cost and related provision for decommissioning costs 2,356,805 3,497,866 (292,120 ) Transfer from provision for disposal of spent nuclear fuel to accrued expenses 455,401 417,687 379,011 Transfer from long-term borrowings and debt securities to current portion of long-term borrowings and debt securities 11,109,271 13,838,578 30,454,012 Transfer from inventory to stored nuclear fuel 908,842 738,720 827,279 Transfer of right-of-use 78,213 197,016 261,862
Summary of Changes in Liabilities Incurred From Financing Activities	(2) Changes in liabilities incurred from financing activities for the years ended December 31, 2022 and 2023 are as follows: 2022 Non-cash Beginning Cash flows Increase Effect of fluctuations Ending In millions of won Borrowings and debt securities ￦ 80,529,513 39,193,815 —  882,037 120,605,365 Lease liabilities 4,410,503 (562,647 ) 109,019 206,268 4,163,143 ￦  84,940,016 38,631,168 109,019 1,088,305 124,768,508 2023 Non-cash Beginning Cash flows Increase Effect of fluctuations Ending In millions of won Borrowings and debt securities ￦ 120,605,365 12,692,924 —  333,541 133,631,830 Lease liabilities 4,163,143 (574,239 ) 253,495 (34,519 ) 3,807,880 ￦ 124,768,508 12,118,685 253,495 299,022 137,439,710

Commitments for Expenditure (Ta

Commitments for Expenditure (Tables)	12 Months Ended
	Dec. 31, 2023
Commitments for Expenditure [Abstract]
Summary of Commitments For Acquisition of Property, Plant and Equipment	(1) The commitments related to acquisition of property, plant and equipment as of December 31, 2022 and 2023 are as follows: 2022 2023 Contracts Commitment Remaining liability balances Commitment Remaining In millions of won Purchase of cable (PVC, 1C, 2000SQ) 153,000M and others (Shin-Bupyung-Youngseo) ￦ 57,203 12,595 57,226 417 Purchase of cable (PVC, 1C, 2500SQ) 103,374M and others (Bukdangjin-Shin-Tangjung) 50,151 37,638 51,796 20,661 Purchase of GIS (362kV, 6300A, 63kA) 23CB – Youngseo S/S 37,168 16,788 37,168 15,109 Purchase of GIS (362kV, 6300A, 63kA) 27CB – Kwangyang S/S 37,744 140 37,744 140 Purchase of cable (PVC, 1C, 2500SQ) 100,548M and others (Kyungin Construction) 58,269 3,883 58,271 746 Purchase of GIS (362kV, 6300A, 63kA) 25CB – Migeum S/S 33,841 25,641 35,136 20,370 Purchase of cable (PVC, 1C, 2000SQ) 5,862M and others (Baekun-Gwangyanghang) 35,949 3,232 35,016 703 Concrete pole (10M, general purpose, 350KGF) 126,948 ea and five other equipments (unit price contract) 202,795 95,428 —  —  Purchase of GIS (362KV, 6300A, 63KA) Type 19 – Shinyangsan S/S 31,834 17,334 32,460 5,635 Purchase of cable (PVC, 1C, 2500SQ) 57,868M and others (Goduk-Seoansung) 40,937 3,748 40,937 654 Purchase of cable (PVC, 1C, 2000SQ) 87,732M and others (Eulwangboonki) 36,155 10,274 36,446 1,015 Purchase of GIS(362KV,6300A,63KA) Type 18 – Wolsung S/Y 32,090 32,090 32,090 26,742 Purchase of cable (FR CNCO-W,1C,325SQ) 31,387 19,213 —  —  Purchase of cable (TR CNCE-W,1C,325SQ) 75,620 40,497 —  —  Purchase of cable (TR CNCE-W,1C,600SQ) 31,851 17,478 —  —  Purchase of cable (TR CNCE-W/AL,1C,400SQ) 53,064 29,436 —  —  System stabilization ESS equipment (Bubuk S/S) Type 1 222,300 222,300 222,300 145,014 System stabilization ESS equipment (Shinnamwon S/S) Type 1 211,500 211,500 211,500 130,169 System stabilization ESS equipment (Yeongcheon S/S) Type 1 73,104 73,104 73,104 18,604 Concrete pole (10M, general purpose, 500KGF) 111,000 ea and four other equipments —  —  67,996 39,971 Advanced EType low voltage electronic watt-hour meter 1,311,552 ea —  —  36,103 —  System stabilization ESS equipment (Yesan S/S) Type 1 —  —  56,403 12,095 System stabilization ESS equipment (Hamyang S/S) Type 1 —  —  35,609 12,870 Construction of Saeul Units (#3,4) 9,800,424 2,455,673 9,800,424 1,113,349 Construction of Shin-Hanul Units (#1,2)(*) 10,327,372 97,889 10,592,760 —  Construction of Shin-Hanul Units (#3,4) 11,007,232 10,858,828 11,680,361 10,935,737 Other 30 contracts 853,941 425,149 1,631,574 1,133,467 Purchase of main machine for Jeju LNG combined 166,287 10,898 166,287 —  Purchase of equipments for the construction project of Boryeong indoor coal storage yard 318,197 287,965 334,932 279,920 Purchase of main machine for Boryeong New Complex Unit 1 —  —  281,600 228,053 Boryeong New Complex Unit 1 Construction Project —  —  186,358 186,358 Service of designing Taean Units (#9,10) 112,909 12,468 112,909 12,468 Purchase of gas turbine and turbine equipment of Gimpo combined heat & power plant 126,302 32,748 123,495 15,603 Purchase of steam turbine, HRSG and POWER BLOCK of Gimpo combined heat & power plant 221,997 38,714 220,864 214 Construction of Gimpo combined heat & power plant 181,798 56,558 211,372 13,960 Purchase of gas turbines, steam turbines, and accessories for Gumi natural gas power plant 197,983 197,983 197,983 193,578 Purchase of heat recovery boiler and accessories for Gumi natural gas power plant —  —  65,918 45,299 2022 2023 Contracts Commitment Remaining liability balances Commitment Remaining In millions of won Construction of Gumi natural gas power plant ￦ 204,094 204,094 210,393 173,350 Installation of natural gas supply facility at Gumi natural gas power plant 70,620 70,620 70,620 61,799 Purchase of coal handling machine for construction of Samcheok Units (#1,2) 299,048 6,687 312,150 5,682 Purchase of main equipment for Namjeju 140,144 3 140,144 3 Purchase of main equipment for Shin-Sejong combined thermal power plant 234,392 32,621 234,392 8,342 Purchase of Hadong thermal power indoor carboniferous plant 162,814 62,299 167,259 48,495 Purchase of phase 2 power generation facility for Yeongwol fuel cells 86,100 30,527 86,350 219 Purchase of fuel cell power generation facilities for the fifth stage of Shinincheon headquarters 81,960 81,960 81,960 18,290 (*) As of December 31, 2023, the commitment amounts include the Shin-Hanul Unit #1, construction of which has completed during the year ended December 31, 2022. In addition, as of December 31, 2023, Shin-hanul Unit #2 is in commissioning.
Summary of Commitments For Inventory Purchase	Contract periods for ore concentrates, conversion, enrichment and design and fabrication are as follows: Type Periods Contracted Concentrate 2023 ~ 2033 21,400 Ton U3O8 Conversion 2023 ~ 2030 16,300 Ton U Enrichment 2023 ~ 2032 18,893 Ton SWU

Contingencies and Commitments (

Contingencies and Commitments (Tables)	12 Months Ended
	Dec. 31, 2023
Contingencies and Commitments [Abstract]
Summary of Ongoing Litigations Related With Contingent Liabilities And Contingent Assets	(1) Ongoing litigations and claims related with contingent liabilities and contingent assets as of December 31, 2022 and 2023 are as follows: 2022 2023 Number Claim Number Claim In millions of won As the defendant 653 ￦ 981,878 666 ￦ 805,227 As the plaintiff 238 599,809 268 571,593
Summary of Credit Lines Provided By Financial Institutions	(3) Lines of credit provided by financial institutions as of December 31, 2023 are as follows: Commitments Financial institutions Currency Credit limit Used amount In millions of won and thousands of foreign currencies Commitments on Bank-overdraft Nonghyup Bank and others KRW 2,260,500 3,096 Limit amount available for CP Hana Bank and others KRW 5,650,000 5,650,000 General Loan, etc. Hana Bank and others KRW 4,400,000 4,350,000 Limit amount available for card Hana Bank and others KRW 47,424 1,919 Loan limit Korea Development Bank and others KRW 2,708,395 1,969,529 DBS Bank and others USD 1,782,000 USD 40,000 KRW 200,000 Certification of payment on payables from foreign country Certification of payment on L/C Nonghyup Bank USD 8,700 5,270 Shinhan Bank and others USD 1,160,452 178,558 Kookmin Bank and others EUR 42,688 42,688 Shinhan Bank JPY 481,785 481,785 Certification of Performance guarantee on contract Hana Bank and others KRW 145,855 125,289 First Abu Dhabi Bank and others USD 921,138 788,313 Korea Development Bank and others JPY 620,000 620,000 Hana Bank EUR 12,106 12,106 Hana Bank INR 44,872 44,872 Hana Bank OMR 6,250 6,250 Hana Bank SAR 4,151 4,151 Certification of bidding Hana Bank USD 5,200 —  Export-Import Bank of Korea EUR 10,000 10,000 Advance payment bond, Warranty bond, Retention bond and others Seoul Guarantee Insurance Hana Bank and others KRW USD 57,670 813,839 57,670 763,596 Saudi National Bank SAR 21,000 21,000 Hana Bank and others MXN 21,597 20,027 Others (*) Nonghyup Bank and others KRW 337,126 KRW 19,943 USD 20,832 EUR 282 Nonghyup Bank and others USD 316,327 USD 60,073 EUR 48,825 StandardChartered AED 50 50 Secured loan of credit sales Nonghyup Bank and others KRW 271,000 —  Inclusive credit Hana Bank KRW 8,000 4,920 Hana Bank and others USD 135,000 USD 15,141 INR 345,206 Equity Bridge Loan Guarantee Export-Import Bank of Korea and others USD 1,764,555 1,372,546 Trade finance DBS Bank and others USD 870,000 —  (*) As of December 31, 2023, the Company has entered into a credit extension agreement for derivatives transactions with Nonghyup Bank, Hana Bank, and Woori Bank as ancillary to currency swap transactions.
Summary of Blank Check And Assets Provided As Collaterals Or Pledges To Financial Institutions By The Company Explanatory	(4) As of December 31, 2023, blank check and assets provided as collaterals or pledges to financial institutions by the Company are follows: Obligor Creditor Assets provided as security Currency Amount Description In millions of won and thousands of foreign currencies Mira Power Limited International Finance Corporation and others Property, plant and equipment and others USD 264,800 Collateral for borrowings(*1) Tamra Offshore Wind Power Co., Ltd. Kyobo Life Insurance Co., Ltd. and others Property, plant and equipment and others KRW 171,600 Collateral for borrowings(*2) Gyeonggi Green Energy Co., Ltd. Korea Development Bank and others Cash and cash equivalents and others KRW 327,080 Collateral for borrowings(*2) Commerce and Industry Energy Co., Ltd. IBK and others Property, plant and equipment and others KRW 110,500 Collateral for borrowings(*2) Jeongam Wind Power Co., Ltd. KDB Capital Corporation and others Cash and cash equivalents and others KRW 230,259 Collateral for borrowings(*2) Gyeongju Wind Power Co., Ltd. Shinhan Bank and others Property, plant and equipment and others KRW 68,400 Collateral for borrowings(*2) Korea Offshore Wind Power Co., Ltd. Woori Bank and others Property, plant and equipment and others KRW 293,400 Collateral for borrowings(*2) Qatrana Electric Power Company The Islamic Development Bank and others Finance lease receivable and property, plant and equipment and others JOD 136,623 Collateral for borrowings(*1) KST Electric Power Company, S.A.P.I. de C.V. Export-Import Bank of Korea and others Finance lease receivable and property, plant and equipment and others USD 401,277 Collateral for debt securities(*1) Incheon Fuel Cell Co., Ltd. Kookmin Bank and others Cash and cash equivalents and others KRW 276,960 Collateral for borrowings(*2) Kyobo Life Insurance Co., Ltd. and others Property, plant and equipment and others KRW 329,736 Collateral for borrowings(*2) KOSPO Youngnam Shinhan Bank and others Cash and cash equivalents and others KRW 744,120 Collateral for borrowings(*2) Jeju Hanlim Offshore Wind Co., Ltd. Kookmin Bank and others Property, plant and equipment and others KRW 1,800 Collateral for borrowings(*2) Western Power Changgi Solar Co., Ltd. Samsung Life Insurance and others Property, plant and equipment and others KRW 58,500 Collateral for borrowings(*2) J Wind First, LLC Woori Bank Trade receivable and others KRW 55,000 Collateral for borrowings (*2) Chitose Solar Power Plant LLC Korea Development Bank Property, plant and equipment and others USD 134,289 Collateral for borrowings(*1) Mangilao Intermediate Holdings LLC Mizuho Bank Trade receivable and others USD 93,392 Collateral for borrowings(*1) (4) As of December 31, 2023, blank check and assets provided as collaterals or pledges to financial institutions by the Company are follows, continued: (*1) This is based on the amount of loan commitment limit. (*2) As of December 31, 2023, the Company has established guarantees for pledge for transfer of rights of long-term borrowings, pledge for insurance claims, pledge for shares, etc.

Subsequent Events (Tables)

Subsequent Events (Tables)	12 Months Ended
	Dec. 31, 2023
Disclosure of non-adjusting events after reporting period [abstract]
Summary of Subsequent Events	(1) Subsequent to December 31, 2023, KEPCO and KEPCO Nuclear Fuel Co., Ltd., a subsidiary of the Company Company Type Interest Type Interest rate (%) Borrowing Maturity Amount In millions of won Korea Electric Power Corporation Long-term borrowing (Mid- Floating 3M CD+0.49 2024.02.21 2029.02.21 ￦ 200,000 Long-term borrowing (Mid- Floating 3M CD+0.50 2024.02.28 2029.02.28 200,000 Long-term borrowing (Mid- to long-term CP) (*) Floating 3M CD+0.34 2024.04.05 2027.04.05 250,000 Long-term borrowing (Mid- to long-term CP) (*) Floating 3M CD+0.48 2024.04.11 2027.04.09 250,000 KEPCO Nuclear Fuel Co., Ltd. Long-term borrowings Floating 3M Bank 2024.01.04 2026.12.28 10,000 (*) The maturity of mid- (2) Subsequent to December 31, 2023, KEPCO and its subsidiaries Korea Hydro & Nuclear Power Co., Ltd., Korea Western Power Co., Ltd. and Korea Southern Power Co., Ltd. issued bonds denominated in Korean won and foreign currency for debt repayment and facility funding and details related thereto are as follows: In millions of won and thousands of USD Company Type Issue date Maturity Interest rate (%) Amount Korea Electric Power Corporation FY24 Global 15th 2024.01.31 2027.01.31 4.88 USD 1,200,000 Korea Hydro & Nuclear Power Co., Ltd. #77-1 Corporate bond 2024.03.05 2029.03.05 5yr KTB rate+0.35 ￦ 150,000 #77-2 Corporate bond 2024.03.05 2034.03.05 10yr KTB rate+0.41 100,000 #77-3 Corporate bond 2024.03.05 2044.03.05 20yr KTB rate+0.40 60,000 #78-1 Corporate bond 2024.03.25 2029.03.25 3.62 100,000 #78-2 Corporate bond 2024.03.25 2034.03.25 3.74 90,000 #78-3 Corporate bond 2024.03.25 2044.03.25 3.72 100,000 Korea Western Power Co., Ltd. #60-1 Corporate bond 2024.01.16 2026.01.16 3.67 150,000 #60-2 Corporate bond 2024.01.16 2029.01.16 3.73 50,000 #60-3 Corporate bond 2024.01.16 2044.01.16 3.74 20,000 #61-1 Corporate bond 2024.01.25 2025.01.24 3.54 100,000 #61-2 Corporate bond 2024.01.25 2027.01.25 3.73 40,000 #61-3 Corporate bond 2024.01.25 2044.01.25 3.82 10,000 Korea Southern Power Co., Ltd. #72-1 Corporate bond 2024.01.11 2027.01.11 3.70 70,000 #72-2 Corporate bond 2024.01.11 2029.01.11 3.79 30,000 Korea East-West Power Co., Ltd. #47-1 Corporate bond 2024.04.08 2027.04.08 3.62 30,000 #47-2 Corporate bond 2024.04.08 2029.04.06 3.67 50,000 (3) KEPCO KDN Co., Ltd., a subsidiary of the Company, sold all of its shares in the associate YTN Co., Ltd. ( 21.43 221,490 (4) On February 23, 2024, the board of directors of KEPCO decided to contribute ￦ 76,600 Korea

Reporting Entity (Description_3

Reporting Entity (Description of the controlling company) - Additional Information (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement [Line Items]
Name of reporting entity or other means of identification	Korea Electric Power Corporation and subsidiaries
Name of parent entity	Korea Electric Power Corporation
Entity Incorporation, Date of Incorporation	Incorporated on December 31, 1981 in accordance with the Korea Electric Power Corporation Act (the “KEPCO Act”)Incorporated on December 31, 1981 in accordance with the Korea Electric Power Corporation Act (the “KEPCO Act”)
Description of nature of entity's operations and principal activities	Engage in the generation, transmission and distribution of electricity and development of electric power resources. KEPCO also provides power plant construction service
Country of incorporation	Republic of Korea
Information of listing on stock market	KEPCO’s stock was first listed on the Korea Stock Exchange on August 10, 1989 and subsequently on the New York Stock Exchange on October 27, 1994 through its depository receipts.
Address of registered office of entity	KEPCO’s headquarters is located in Naju-si, Jeollanam-do.
Issued capital	₩ 3,209,820	₩ 3,209,820

Reporting Entity (Description_4

Reporting Entity (Description of the Controlling Company) - Summary of the Company's Shareholders (Details)	Dec. 31, 2023 shares
Disclosure of shareholders information [Line Items]
Number of shares	641,964,077
Percentage of ownership	100%
The Government of the Republic of Korea
Disclosure of shareholders information [Line Items]
Number of shares	116,841,794
Percentage of ownership	18.20%
Korea Development Bank (KDB)
Disclosure of shareholders information [Line Items]
Number of shares	211,235,264
Percentage of ownership	32.90%
Foreign investors
Disclosure of shareholders information [Line Items]
Number of shares	86,927,104
Percentage of ownership	13.54%
Other
Disclosure of shareholders information [Line Items]
Number of shares	226,959,915
Percentage of ownership	35.36%

Basis of Preparation - Addition

Basis of Preparation - Additional Information (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Unbilled Revenue [Member]
Disclosure Of Basis Of Preparation Of Financial Statements [Line Items]
Unbilled revenue recognized	₩ 2,504,479	₩ 2,348,813

Material Accounting Policies -

Material Accounting Policies - Summary of Property, Plant and Equipment, Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2023
Buildings
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	8 ~ 40
Structures
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	5 ~ 50
Machinery
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	2 ~ 32
Vehicles
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	3 ~ 8
Loaded heavy water
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	30
Asset retirement costs
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	18, 30, 40, 60
Right-of-use assets
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	1 ~ 65
Ships
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	9
Others
Disclosure of useful life of property plant and equipment [Line Items]
Useful lives (years)	4 ~ 15

Material Accounting Policies _2

Material Accounting Policies - Summary of Intangible Assets, Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2023
Usage rights for donated assets
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	10 ~ 30
Amortization methods	Straight line
Software
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	4, 5
Amortization methods	Straight line
Industrial rights
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	5 ~ 10
Amortization methods	Straight line
Development expenditures
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	5
Amortization methods	Straight line
Leasehold rights
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	8 ~ 10
Amortization methods	Straight line
Other intangible assets
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	3 ~ 50 or indefinite
Amortization methods	Straight line
Mining rights
Disclosure of intangible assets with indefinite useful life [Line Items]
Useful lives (years)	0
Amortization methods	Unit of production

Material Accounting Policies _3

Material Accounting Policies - Summary of Classification and Measurement of Financial Assets (Details)	12 Months Ended
	Dec. 31, 2023
To collect contractual cash flows | Solely payments of principal and interest
Summary Of Classification And Measurement Of Financial Assets [Line Items]
Financial instruments, classified under IFRS 9	Amortized cost
Both collecting contractual cash flows and selling financial assets | Solely payments of principal and interest
Summary Of Classification And Measurement Of Financial Assets [Line Items]
Financial instruments, classified under IFRS 9	FVOCI	[1]
Both collecting contractual cash flows and selling financial assets | Other than SPPI
Summary Of Classification And Measurement Of Financial Assets [Line Items]
Financial instruments, classified under IFRS 9	FVTPL	[2]
To sell financial assets | Solely payments of principal and interest
Summary Of Classification And Measurement Of Financial Assets [Line Items]
Financial instruments, classified under IFRS 9	FVTPL
[1]To eliminate or reduce an accounting mismatch, the Company may elect to recognize the amount of change in fair value in profit or loss.[2]On initial recognition of an equity investment that is not held for trading, the Company may irrevocably elect to present subsequent changes in the investment’s fair value in OCI.

Material Accounting Policies _4

Material Accounting Policies - Additional Information (Details) - Investment properties [Member]	12 Months Ended
	Dec. 31, 2023
Bottom of range [member]
Material Accounting Policies [Line Items]
Investment property useful life (in years)	8
Top of range [member]
Material Accounting Policies [Line Items]
Investment property useful life (in years)	40

Segment, Geographic and Other_3

Segment, Geographic and Other Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023
Disclosure of operating segments [line items]
Information about major customers	There is no single customer which accounts for 10% or more of the Company’s revenue for the years ended December 31, 2021, 2022 and 2023.

Segment, Geographic and Other_4

Segment, Geographic and Other Information - Summary of Operating Segments (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of operating segments [line items]
Total segment revenue	₩ 87,476,410	₩ 70,546,024	₩ 60,012,375
Intersegment revenue	0	0	0
Revenue from external customers	87,476,410	70,546,024	60,012,375
Depreciation and amortisation	13,032,263	12,461,412	11,942,492
Interest income	429,620	340,753	221,874
Interest expense	4,451,659	2,818,546	1,914,457
Employee benefit expense	358,730	485,700	511,942
Loss on abandonment of property, plant and equipment	196,697	160,909	207,934
Increase in provisions, net	1,611,082	2,146,979	2,466,452
Operating profit (loss)	(4,245,016)	(32,240,531)	(5,722,991)
Finance income	1,425,031	1,833,312	1,402,614
Finance expense	(5,347,018)	(4,746,791)	(3,245,777)
Profit (loss) related to associates and joint ventures	613,026	1,310,391	494,584
Profit (loss) before income tax	(7,553,977)	(33,843,619)	(7,071,570)
Segment assets	239,714,965	234,804,994
Investments in associates and joint ventures	9,662,588	8,992,048	7,471,384
Acquisition of non-current assets	14,746,889	12,612,993
Segment liabilities	202,450,215	192,804,738
Deferred taxes
Disclosure of operating segments [line items]
Segment assets	1,636	(452)
Investments in associates and joint ventures	0	0
Acquisition of non-current assets	0	0
Segment liabilities	1,629,280	2,801,832
Equity method adjustment
Disclosure of operating segments [line items]
Segment assets	2,997,016	2,859,623
Investments in associates and joint ventures	0	0
Acquisition of non-current assets	0	0
Segment liabilities	0	0
Others
Disclosure of operating segments [line items]
Segment assets	(10,501,492)	(10,820,983)
Investments in associates and joint ventures	0	0
Acquisition of non-current assets	0	0
Segment liabilities	(3,450)	2,489
Elimination of intersegment amounts
Disclosure of operating segments [line items]
Segment assets	(46,071,077)	(43,801,723)
Investments in associates and joint ventures	0	0
Acquisition of non-current assets	(390,686)	(38,633)
Segment liabilities	(11,463,805)	(9,304,648)
Operating segments
Disclosure of operating segments [line items]
Profit (loss) related to associates and joint ventures	613,026	1,310,391	494,584
Segment assets	293,288,882	286,568,529
Investments in associates and joint ventures	9,662,588	8,992,048
Acquisition of non-current assets	15,137,575	12,651,626
Segment liabilities	212,288,190	199,305,065
Operating segments | Transmission and distribution
Disclosure of operating segments [line items]
Total segment revenue	85,082,542	68,239,707	58,999,388
Intersegment revenue	1,728,602	1,922,354	1,672,776
Revenue from external customers	83,353,940	66,317,353	57,326,612
Depreciation and amortisation	4,258,909	4,130,004	3,990,464
Interest income	92,380	67,076	36,831
Interest expense	2,826,916	1,420,802	678,986
Employee benefit expense	127,038	180,114	193,412
Loss on abandonment of property, plant and equipment	182,742	157,784	202,262
Increase in provisions, net	419,564	611,534	1,194,643
Operating profit (loss)	(6,153,936)	(33,623,874)	(7,244,319)
Profit (loss) related to associates and joint ventures	314,373	980,146	391,116
Segment assets	138,838,342	131,023,727
Investments in associates and joint ventures	5,872,000	5,678,141
Acquisition of non-current assets	7,636,677	6,055,179
Segment liabilities	120,181,250	108,963,058
Operating segments | Electric power generation (Nuclear)
Disclosure of operating segments [line items]
Total segment revenue	10,798,378	10,386,091	9,324,391
Intersegment revenue	10,666,260	10,254,271	9,207,516
Revenue from external customers	132,118	131,820	116,875
Depreciation and amortisation	4,403,610	4,034,774	3,611,594
Interest income	69,209	45,789	22,209
Interest expense	687,743	557,218	477,512
Employee benefit expense	62,280	82,466	86,730
Loss on abandonment of property, plant and equipment	0	0	0
Increase in provisions, net	585,630	624,221	680,358
Operating profit (loss)	819,838	761,109	762,164
Profit (loss) related to associates and joint ventures	(2,639)	(753)	(18,146)
Segment assets	70,535,018	69,129,625
Investments in associates and joint ventures	169,155	143,304
Acquisition of non-current assets	3,070,528	2,008,409
Segment liabilities	45,660,916	42,843,974
Operating segments | Electric power generation (Non-nuclear)
Disclosure of operating segments [line items]
Total segment revenue	35,159,641	41,944,339	25,928,596
Intersegment revenue	32,253,979	39,252,851	24,518,167
Revenue from external customers	2,905,662	2,691,488	1,410,429
Depreciation and amortisation	4,180,939	4,091,081	4,182,470
Interest income	65,403	53,242	22,226
Interest expense	741,282	694,559	624,391
Employee benefit expense	109,151	140,067	121,020
Loss on abandonment of property, plant and equipment	13,863	0	5,672
Increase in provisions, net	352,058	619,947	285,152
Operating profit (loss)	929,210	289,001	370,440
Profit (loss) related to associates and joint ventures	301,681	329,112	109,765
Segment assets	66,265,884	69,468,039
Investments in associates and joint ventures	3,567,345	3,113,918
Acquisition of non-current assets	3,490,863	3,547,815
Segment liabilities	38,415,202	40,428,907
Operating segments | Plant maintenance & engineering service
Disclosure of operating segments [line items]
Total segment revenue	3,091,022	2,975,062	2,805,785
Intersegment revenue	2,626,190	2,516,699	2,370,900
Revenue from external customers	464,832	458,363	434,885
Depreciation and amortisation	129,628	123,168	121,493
Interest income	23,638	14,003	9,515
Interest expense	1,270	1,405	933
Employee benefit expense	52,890	82,070	94,269
Loss on abandonment of property, plant and equipment	0	0	0
Increase in provisions, net	206,215	213,671	213,500
Operating profit (loss)	355,284	239,529	245,360
Profit (loss) related to associates and joint ventures	(389)	1,886	11,849
Segment assets	4,271,409	4,051,157
Investments in associates and joint ventures	54,088	56,685
Acquisition of non-current assets	203,352	200,338
Segment liabilities	1,549,863	1,272,408
Operating segments | Others
Disclosure of operating segments [line items]
Total segment revenue	2,175,972	2,750,231	2,018,997
Intersegment revenue	1,556,114	1,803,231	1,295,423
Revenue from external customers	619,858	947,000	723,574
Depreciation and amortisation	204,322	211,719	159,222
Interest income	226,243	195,966	158,680
Interest expense	258,877	195,860	162,345
Employee benefit expense	48,105	53,017	52,698
Loss on abandonment of property, plant and equipment	92	3,125	0
Increase in provisions, net	444	9,463	2,981
Operating profit (loss)	89,302	333,547	208,139
Profit (loss) related to associates and joint ventures	0	0	0
Segment assets	13,378,229	12,895,981
Investments in associates and joint ventures	0	0
Acquisition of non-current assets	736,155	839,885
Segment liabilities	6,480,959	5,796,718
Material reconciling items
Disclosure of operating segments [line items]
Total segment revenue	(48,831,145)	(55,749,406)	(39,064,782)
Intersegment revenue	(48,831,145)	(55,749,406)	(39,064,782)
Revenue from external customers	0	0	0
Depreciation and amortisation	(145,145)	(129,334)	(122,751)
Interest income	(47,253)	(35,323)	(27,587)
Interest expense	(64,429)	(51,298)	(29,710)
Employee benefit expense	(40,734)	(52,034)	(36,187)
Loss on abandonment of property, plant and equipment	0	0	0
Increase in provisions, net	47,171	68,143	89,818
Operating profit (loss)	(284,714)	(239,843)	(64,775)
Profit (loss) related to associates and joint ventures	0	0	₩ 0
Segment assets	(53,573,917)	(51,763,535)
Investments in associates and joint ventures	0	0
Acquisition of non-current assets	(390,686)	(38,633)
Segment liabilities	₩ (9,837,975)	₩ (6,500,327)

Segment, Geographic and Other_5

Segment, Geographic and Other Information - Summary of Geographical Areas (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of geographical areas [line items]
Revenue from external customers		₩ 87,476,410	₩ 70,546,024	₩ 60,012,375
Non-current assets	[1]	191,206,960	188,431,533	182,333,348
Domestic
Disclosure of geographical areas [line items]
Revenue from external customers		86,242,808	69,142,730	58,771,252
Non-current assets	[1]	186,384,115	183,707,117	178,760,564
Overseas
Disclosure of geographical areas [line items]
Revenue from external customers	[2]	1,233,602	1,403,294	1,241,123
Non-current assets	[1],[2]	₩ 4,822,845	₩ 4,724,416	₩ 3,572,784
[1]The amounts exclude financial assets and deferred tax assets.[2]Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current assets attributable to particular countries are not material, they are not disclosed individually.

Classification of Financial I_3

Classification of Financial Instruments - Classification of Financial Assets (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Cash and cash equivalents	₩ 4,342,887	₩ 3,234,780	₩ 2,635,238	₩ 2,029,584
Categories of current financial assets
Current financial assets at fair value through profit or loss	2,054,021	3,181,791
Current financial assets at amortized costs	28,905	16,762
Current Derivative assets	307,732	289,603
Other financial assets	716,739	798,819
Trade and other receivables	11,985,735	10,461,822
Total current financial assets And Cash and cash equivalents	19,436,019	17,983,577
Categories of Non-current Financial assets
Non-current financial assets at fair value through profit or loss	657,264	527,717
Non-current financial assets at fair value through other comprehensive income	502,443	502,829
Non-current financial assets at amortized costs	9,938	10,236
Non-current Derivative assets	692,662	728,421
Other financial assets	1,683,907	1,567,632
Trade and other receivables	2,193,587	2,153,080
Total non-current financial assets	5,739,801	5,489,915
Total financial assets	25,175,820	23,473,492
Financial assets at fair value through profit or loss
Categories of current financial assets
Current financial assets at fair value through profit or loss	2,054,021	3,181,791
Categories of Non-current Financial assets
Non-current financial assets at fair value through profit or loss	490,589	301,121
Financial assets at fair value through profit or loss | At fair value [member]
Disclosure of financial assets [line items]
Cash and cash equivalents	0	0
Categories of current financial assets
Current financial assets at fair value through profit or loss	2,054,021	3,181,791
Current financial assets at amortized costs	0	0
Current Derivative assets	227,434	154,730
Other financial assets	0	0
Trade and other receivables	0	0
Total current financial assets And Cash and cash equivalents	2,281,455	3,336,521
Categories of Non-current Financial assets
Non-current financial assets at fair value through profit or loss	657,264	527,717
Non-current financial assets at fair value through other comprehensive income	0	0
Non-current financial assets at amortized costs	0	0
Non-current Derivative assets	503,514	538,342
Other financial assets	0	0
Trade and other receivables	0	0
Total non-current financial assets	1,160,778	1,066,059
Total financial assets	3,442,233	4,402,580
Financial assets at fair value through other comprehensive income | At fair value [member]
Disclosure of financial assets [line items]
Cash and cash equivalents	0	0
Categories of current financial assets
Current financial assets at fair value through profit or loss	0	0
Current financial assets at amortized costs	0	0
Current Derivative assets	0	0
Other financial assets	0	0
Trade and other receivables	0	0
Total current financial assets And Cash and cash equivalents	0	0
Categories of Non-current Financial assets
Non-current financial assets at fair value through profit or loss	0	0
Non-current financial assets at fair value through other comprehensive income	502,443	502,829
Non-current financial assets at amortized costs	0	0
Non-current Derivative assets	0	0
Other financial assets	0	0
Trade and other receivables	0	0
Total non-current financial assets	502,443	502,829
Total financial assets	502,443	502,829
Financial assets at amortized cost | At amortized cost [member]
Disclosure of financial assets [line items]
Cash and cash equivalents	4,342,887	3,234,780
Categories of current financial assets
Current financial assets at fair value through profit or loss	0	0
Current financial assets at amortized costs	28,905	16,762
Current Derivative assets	0	0
Other financial assets	716,739	798,819
Trade and other receivables	11,985,735	10,461,822
Total current financial assets And Cash and cash equivalents	17,074,266	14,512,183
Categories of Non-current Financial assets
Non-current financial assets at fair value through profit or loss	0	0
Non-current financial assets at fair value through other comprehensive income	0	0
Non-current financial assets at amortized costs	9,938	10,236
Non-current Derivative assets	0	0
Other financial assets	1,683,907	1,567,632
Trade and other receivables	2,193,587	2,153,080
Total non-current financial assets	3,887,432	3,730,948
Total financial assets	20,961,698	18,243,131
Derivative assets (applying hedge accounting)
Disclosure of financial assets [line items]
Cash and cash equivalents	0	0
Categories of current financial assets
Current financial assets at fair value through profit or loss	0	0
Current financial assets at amortized costs	0	0
Current Derivative assets	80,298	134,873
Other financial assets	0	0
Trade and other receivables	0	0
Total current financial assets And Cash and cash equivalents	80,298	134,873
Categories of Non-current Financial assets
Non-current financial assets at fair value through profit or loss	0	0
Non-current financial assets at fair value through other comprehensive income	0	0
Non-current financial assets at amortized costs	0	0
Non-current Derivative assets	189,148	190,079
Other financial assets	0	0
Trade and other receivables	0	0
Total non-current financial assets	189,148	190,079
Total financial assets	₩ 269,446	₩ 324,952

Classification of Financial I_4

Classification of Financial Instruments - Classification of Financial Liabilities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Categories of current financial liabilities
Borrowings	₩ 16,446,821	₩ 12,457,853
Debt securities	24,674,526	10,201,149
Derivative liabilities	18,379	44,994
Trade and other payables	9,089,973	11,983,549
Total current financial liabilities	50,229,699	34,687,545
Categories of non-current financial liabilities
Borrowings	3,392,831	2,962,323
Debt securities	89,117,652	94,984,040
Derivative liabilities	433,855	387,757
Trade and other payables	4,981,957	5,638,914
Total non-current financial liabilities	97,926,295	103,973,034
Total financial liabilities	148,155,994	138,660,579
Financial liabilities at fair value through profit or loss
Categories of current financial liabilities
Borrowings	0	0
Debt securities	0	0
Derivative liabilities	18,379	44,994
Trade and other payables	0	0
Total current financial liabilities	18,379	44,994
Categories of non-current financial liabilities
Borrowings	0	0
Debt securities	0	0
Derivative liabilities	410,291	362,252
Trade and other payables	0	0
Total non-current financial liabilities	410,291	362,252
Total financial liabilities	428,670	407,246
Financial liabilities recognized at amortized cost
Categories of current financial liabilities
Borrowings	16,446,821	12,457,853
Debt securities	24,674,526	10,201,149
Derivative liabilities	0	0
Trade and other payables	9,089,973	11,983,549
Total current financial liabilities	50,211,320	34,642,551
Categories of non-current financial liabilities
Borrowings	3,392,831	2,962,323
Debt securities	89,117,652	94,984,040
Derivative liabilities	0	0
Trade and other payables	4,981,957	5,638,914
Total non-current financial liabilities	97,492,440	103,585,277
Total financial liabilities	147,703,760	138,227,828
Derivatives (applying hedge accounting)
Categories of current financial liabilities
Borrowings	0	0
Debt securities	0	0
Derivative liabilities	0	0
Trade and other payables	0	0
Total current financial liabilities	0	0
Categories of non-current financial liabilities
Borrowings	0	0
Debt securities	0	0
Derivative liabilities	23,564	25,505
Trade and other payables	0	0
Total non-current financial liabilities	23,564	25,505
Total financial liabilities	₩ 23,564	₩ 25,505

Classification of Financial I_5

Classification of Financial Instruments - Classification of Comprehensive Income (Loss) from Financial Instruments (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income, expense, gains or losses of financial instruments
Dividends income		₩ 25,941	₩ 28,875	₩ 10,522
Gain (loss) on valuation of derivatives		234,199	224,218	822,994
Gain (loss) on transaction of derivatives		89,659	224,685	84,082
Gain (loss) on valuation of derivatives (equity, before tax)	[1]	(8,518)	(65,052)	(40,460)
Interest expense of trade and other payables		200,440	204,078	213,765
Interest expense of others		614,332	472,248	384,423
Other finance income		4,970	925	1,284
Other finance expenses		2,513	25,144	4,058
Cash and cash equivalents
Income, expense, gains or losses of financial instruments
Interest income		100,205	51,872	12,692
Gain (loss) on foreign currency transactions and translations		(2,073)	22,158	34,923
Financial assets at amortized cost
Income, expense, gains or losses of financial instruments
Interest income		2,929	1,308	797
Gain (loss) on foreign currency transactions and translations		(1,774)	5,087	(3,647)
Financial assets at fair value through other comprehensive income
Income, expense, gains or losses of financial instruments
Dividends income		21,748	26,881	7,573
Financial assets at fair value through profit or loss
Income, expense, gains or losses of financial instruments
Interest income		65,470	58,540	18,415
Dividends income		4,193	1,994	2,949
Gain (loss) on valuation of derivatives		144,797	336,049	450,896
Gain (loss) on transaction of derivatives		130,230	205,298	54,352
Gain (loss) on valuation of financial assets		128,307	(37,230)	8,858
Gain (loss) on disposal of financial assets		13,161	9,358	4,221
Loans and receivables
Income, expense, gains or losses of financial instruments
Interest income		44,029	33,545	25,196
Gain (loss) on foreign currency transactions and translations		127	596	729
Trade and other receivables
Income, expense, gains or losses of financial instruments
Interest income		168,303	164,653	144,543
Gain (loss) on disposal of financial assets		0	0	2,452
Gain (loss) on foreign currency transactions and translations		27,363	1,019	14,207
Short-term financial instruments
Income, expense, gains or losses of financial instruments
Interest income		34,260	15,827	7,531
Gain (loss) on foreign currency transactions and translations		0	3,513	32,218
Long-term financial instruments
Income, expense, gains or losses of financial instruments
Interest income		14,183	14,371	12,470
Gain (loss) on foreign currency transactions and translations		0	1	27
Other financial assets
Income, expense, gains or losses of financial instruments
Interest income		241	637	230
Derivative (applying hedge accounting)
Income, expense, gains or losses of financial instruments
Gain (loss) on valuation of derivatives		76,814	149,888	211,180
Gain (loss) on transaction of derivatives		19,604	54,422	31,351
Gain (loss) on valuation of derivatives (equity, before tax)		(10,539)	(93,699)	(11,734)
Financial liabilities at fair value through profit or loss
Income, expense, gains or losses of financial instruments
Gain (loss) on valuation of derivatives		961	(345,313)	2,751
Gain (loss) on transaction of derivatives		(80,640)	(110,236)	(15,358)
Financial liabilities carried at amortized cost
Income, expense, gains or losses of financial instruments
Gain (loss) on repayment of financial liabilities		0	(15)	(10)
Gain (loss) on foreign currency transactions and translations		(420,203)	(936,269)	(1,162,835)
Interest expense of borrowings and debt securities		3,636,887	2,142,220	1,316,269
Interest expense of trade and other payables		200,440	204,078	213,765
Interest expense of others		614,332	472,248	384,423
Other finance income		4,971	927	1,284
Other finance expenses		1,796	167	2,504
Derivatives (applying hedge accounting)
Income, expense, gains or losses of financial instruments
Gain (loss) on valuation of derivatives		11,627	83,594	158,167
Gain (loss) on transaction of derivatives		20,465	75,201	13,737
Gain (loss) on valuation of derivatives (equity, before tax)		₩ 2,021	₩ 28,647	₩ (28,726)
[1]For the years ended December 31, 2021, 2022 and 2023, the net loss on valuation of derivatives applying cash flow hedge accounting of ￦15,778 million, ￦24,415 million and ￦3,654 million, net of tax, are included in other comprehensive loss, respectively.

Restricted Deposits - Summary o

Restricted Deposits - Summary of Restricted Deposits (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Restricted Deposits [Line Items]
Total Restricted Deposits	₩ 1,302,733	₩ 1,310,402
Cash and cash equivalents
Restricted Deposits [Line Items]
Escrow accounts	3,010	2,912
Deposits for government project	26,969	30,586
Collateral provided for borrowings	190,525	250,346
Collateral provided for lawsuit	54	57
Deposits for transmission regional support program	9,481	8,626
Deposits for other business purposes	5,550	3,825
Short-term financial instruments
Restricted Deposits [Line Items]
Collateral provided for borrowings	24,728	1,000
Restriction on withdrawal related to 'win-win growth program' for small and medium enterprises	80,500	101,500
Non-Current financial assets at fair value through profit or loss
Restricted Deposits [Line Items]
Decommissioning costs of nuclear power plants	271,047	386,220
Long-term financial instruments
Restricted Deposits [Line Items]
Escrow accounts	0	1,603
Collateral provided for borrowings	28,245	21,745
Decommissioning costs of nuclear power plants	655,030	497,609
Guarantee deposits for banking accounts at oversea branches	36	18
Other Non-current assets
Restricted Deposits [Line Items]
Deposits for other business purposes	₩ 7,558	₩ 4,355

Cash and Cash Equivalents - Sum

Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents [abstract]
Cash	₩ 14,070	₩ 21,113
Other demand deposits	1,780,548	1,906,248
Short-term deposits, classified as cash equivalents	1,107,687	1,063,290
Short-term investments, classified as cash equivalents	1,440,582	244,129
Total cash and cash equivalents	₩ 4,342,887	₩ 3,234,780	₩ 2,635,238	₩ 2,029,584

Trade and Other Receivables - T

Trade and Other Receivables - Trade and Other Receivables (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023		Dec. 31, 2022
Disclosure of financial assets [line items]
Trade and other current receivables	₩ 11,985,735		₩ 10,461,822
Trade and other non-current receivables	2,193,587		2,153,080
Trade and other receivables	14,179,322		12,614,902
Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	12,274,256		10,705,408
Trade and other non-current receivables	2,288,498		2,231,660
Trade and other receivables	14,562,754		12,937,068
Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(283,741)		(241,217)
Trade and other non-current receivables	(82,857)		(67,236)
Trade and other receivables	(366,598)		(308,453)
Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	(4,780)		(2,369)
Trade and other non-current receivables	(12,054)		(11,344)
Trade and other receivables	(16,834)		(13,713)
Trade receivables
Disclosure of financial assets [line items]
Trade and other current receivables	11,009,543		9,504,051
Trade and other non-current receivables	205,081		195,784
Trade and other receivables	11,214,624		9,699,835
Trade receivables | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	11,239,601		9,700,880
Trade and other non-current receivables	207,668		197,955
Trade and other receivables	11,447,269		9,898,835
Trade receivables | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(230,058)		(196,829)
Trade and other non-current receivables	(2,587)		(2,171)
Trade and other receivables	(232,645)		(199,000)
Trade receivables | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	0		0
Trade and other non-current receivables	0		0
Other receivables
Disclosure of financial assets [line items]
Trade and other current receivables	976,192		957,771
Trade and other non-current receivables	1,988,506		1,957,296
Trade and other receivables	2,964,698		2,915,067
Other receivables | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	1,034,655		1,004,528
Trade and other non-current receivables	2,080,830		2,033,705
Trade and other receivables	3,115,485		3,038,233
Other receivables | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(53,683)		(44,388)
Trade and other non-current receivables	(80,270)		(65,065)
Trade and other receivables	(133,953)		(109,453)
Other receivables | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	(4,780)		(2,369)
Trade and other non-current receivables	(12,054)		(11,344)
Trade and other receivables	(16,834)		(13,713)
Non-trade receivables
Disclosure of financial assets [line items]
Trade and other current receivables	344,180		417,931
Trade and other non-current receivables	144,169		87,250
Non-trade receivables | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	393,859		459,245
Trade and other non-current receivables	198,453		140,128
Non-trade receivables | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(49,626)		(41,293)
Trade and other non-current receivables	(54,182)		(52,696)
Non-trade receivables | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	(53)		(21)
Trade and other non-current receivables	(102)		(182)
Accrued income
Disclosure of financial assets [line items]
Trade and other current receivables	133,033		109,267
Trade and other non-current receivables	7,342		2,004
Accrued income | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	133,033		109,267
Trade and other non-current receivables	7,342		2,004
Accrued income | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	0		0
Trade and other non-current receivables	0		0
Accrued income | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	0		0
Trade and other non-current receivables	0		0
Deposits
Disclosure of financial assets [line items]
Trade and other current receivables	312,810		287,232
Trade and other non-current receivables	429,506		448,699
Deposits | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	317,541		289,580
Trade and other non-current receivables	441,721		459,861
Deposits | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(4)		0
Trade and other non-current receivables	(263)		0
Deposits | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	(4,727)		(2,348)
Trade and other non-current receivables	(11,952)		(11,162)
Finance lease receivables
Disclosure of financial assets [line items]
Trade and other current receivables	72,900	[1]	65,781	[2]
Trade and other non-current receivables	1,171,005	[3]	1,169,104	[4]
Finance lease receivables | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	75,661	[1]	67,583	[2]
Trade and other non-current receivables	1,173,500	[3]	1,171,807	[4]
Finance lease receivables | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(2,761)	[1]	(1,802)	[2]
Trade and other non-current receivables	(2,495)	[3]	(2,703)	[4]
Finance lease receivables | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	0	[1]	0	[2]
Trade and other non-current receivables	0	[3]	0	[4]
Others
Disclosure of financial assets [line items]
Trade and other current receivables	113,269		77,560
Trade and other non-current receivables	236,484		250,239
Others | Gross amount
Disclosure of financial assets [line items]
Trade and other current receivables	114,561		78,853
Trade and other non-current receivables	259,814		259,905
Others | Allowance for doubtful accounts
Disclosure of financial assets [line items]
Trade and other current receivables	(1,292)		(1,293)
Trade and other non-current receivables	(23,330)		(9,666)
Others | Present value discount
Disclosure of financial assets [line items]
Trade and other current receivables	0		0
Trade and other non-current receivables	₩ 0		₩ 0
[1]Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦114,118 million.[2]Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦114,347 million.[3]Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦943,316 million.[4]Gross amount of finance lease receivables is the net lease investment by deducting unearned finance income of ￦1,024,927 million.

Trade and Other Receivables -_2

Trade and Other Receivables - Trade and Other Receivables (Parenthetical) (Details) - Finance lease receivables - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Trade and Other Receivables [Line Items]
Unearned finance income relating to current finance lease payments receivable	₩ 114,118	₩ 114,347
Unearned finance income relating to non-current finance lease payments receivable	₩ 943,316	₩ 1,024,927

Trade and Other Receivables - O

Trade and Other Receivables - Other Receivables (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	₩ 14,179,322	₩ 12,614,902
Gross amount
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	14,562,754	12,937,068
Allowance for doubtful accounts
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	(366,598)	(308,453)
Present value discount
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	(16,834)	(13,713)
Trade receivables
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	11,214,624	9,699,835
Trade receivables | Not overdue
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	11,120,582	9,509,775
Trade receivables | Impairment reviewed
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	326,687	389,060
Trade receivables | Impairment reviewed | Less than 60 days
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	6,403	5,592
Trade receivables | Impairment reviewed | 60 ~ 90 days
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	55,802	36,389
Trade receivables | Impairment reviewed | 90 ~ 120 days
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	20,535	31,442
Trade receivables | Impairment reviewed | 120 days ~ 1year
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	58,350	99,655
Trade receivables | Impairment reviewed | Over 1 year
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	185,597	215,982
Trade receivables | Gross amount
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	11,447,269	9,898,835
Trade receivables | Allowance for doubtful accounts
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	(232,645)	(199,000)
Other receivables
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	2,964,698	2,915,067
Other receivables | Not overdue
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	2,857,337	2,857,253
Other receivables | Impairment reviewed
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	258,148	180,980
Other receivables | Impairment reviewed | Less than 60 days
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	5	92
Other receivables | Impairment reviewed | 60 ~ 90 days
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	27,634	13,643
Other receivables | Impairment reviewed | 90 ~ 120 days
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	727	2,982
Other receivables | Impairment reviewed | 120 days ~ 1year
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	69,651	18,494
Other receivables | Impairment reviewed | Over 1 year
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	160,131	145,769
Other receivables | Gross amount
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	3,115,485	3,038,233
Other receivables | Allowance for doubtful accounts
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	(133,953)	(109,453)
Other receivables | Present value discount
Disclosure of financial assets that are either past due or impaired [line items]
Trade and other receivables	₩ (16,834)	₩ (13,713)

Trade and Other Receivables - C

Trade and Other Receivables - Changes in the Allowance for Doubtful Accounts (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Trade receivables
Reconciliation of changes in allowance account for credit losses of financial assets [Line Items]
Beginning balance	₩ 199,000	₩ 205,339	₩ 208,990
Changes in allowance account for credit losses of financial assets
Bad debt expense	68,385	27,078	19,039
Write-off	(26,109)	(26,319)	(21,809)
Reversal	(5,577)	(3,444)	(1,071)
Others	(3,054)	(3,654)	190
Ending balance	232,645	199,000	205,339
Other receivables
Reconciliation of changes in allowance account for credit losses of financial assets [Line Items]
Beginning balance	109,453	82,710	132,379
Changes in allowance account for credit losses of financial assets
Bad debt expense	24,290	4,220	18,411
Write-off	(4,472)	(1,103)	(58,762)
Reversal	(1,942)	(37)	(79)
Others	6,624	23,663	(9,239)
Ending balance	₩ 133,953	₩ 109,453	₩ 82,710

Trade and Other Receivables -

Trade and Other Receivables - Additional Information (Details)	Dec. 31, 2023
Trade and other receivables [abstract]
Percentage of interest rate applied on the overdue trade receivables	1.50%

Financial Assets at Fair Valu_5

Financial Assets at Fair Value Through Profit or Loss - Summary of Financial Assets at Fair Value Through Profit or Loss (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Current financial assets at fair value through profit or loss		₩ 2,054,021	₩ 3,181,791
Non-current financial assets at fair value through profit or loss		657,264	527,717
Financial assets at fair value through profit or loss
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Current financial assets at fair value through profit or loss		2,054,021	3,181,791
Non-current financial assets at fair value through profit or loss		490,589	301,121
Financial assets at fair value through profit or loss | Beneficiary Certificate
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Current financial assets at fair value through profit or loss		130,363	294
Non-current financial assets at fair value through profit or loss		107,252	121,406
Financial assets at fair value through profit or loss | Cooperative
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Current financial assets at fair value through profit or loss		0	0
Non-current financial assets at fair value through profit or loss		6,735	6,329
Financial assets at fair value through profit or loss | Others
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Current financial assets at fair value through profit or loss	[1]	1,923,658	3,181,497
Non-current financial assets at fair value through profit or loss	[1]	376,602	173,386
Financial assets designated as at fair value through profit or loss | Debt with embedded derivatives
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Current financial assets at fair value through profit or loss		0	0
Non-current financial assets at fair value through profit or loss		₩ 166,675	₩ 226,596
[1]‘Others’ include MMT, etc.

Financial Assets at Fair Valu_6

Financial Assets at Fair Value Through Profit or Loss - Summary of Income (Loss) from Financial Assets at fair Value Through Profit or Loss (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	₩ 211,131	₩ 32,661
Financial assets at fair value through profit or loss | Beneficiary Certificate
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	(59)	4,527
Financial assets at fair value through profit or loss | Cooperative securities
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	272	120
Financial assets at fair value through profit or loss | Debt with embedded derivatives
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	2,934	946
Financial assets at fair value through profit or loss | Others
Financial Assets At Fair Value Through Profit Or Loss [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	₩ 207,984	₩ 27,068

Financial Assets at Fair Valu_7

Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Changes in Financial Assets at Fair Value Through Other Comprehensive Income (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		₩ 502,829		₩ 435,107
Acquisition		14,060		9,451
Disposal		(5,332)		0
Valuation		(9,970)		61,860
Others		856		(3,589)
Ending Balance		502,443		502,829
Listed equity securities
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		300,057		273,826
Acquisition		430		0
Disposal		0		0
Valuation		(15,433)		28,585
Others		0		(2,354)
Ending Balance		285,054		300,057
Unlisted equity securities
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		202,243	[1]	160,790
Acquisition		9,550		9,451
Disposal		(5,332)		0
Valuation		5,445		33,237
Others		856		(1,235)
Ending Balance	[1]	212,762		202,243
Corporate bond
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		529		491
Acquisition		4,080		0
Disposal		0		0
Valuation		18		38
Others		0		0
Ending Balance		4,627		529
Listed and unlisted equity securties
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		502,300		434,616
Acquisition		9,980		9,451
Disposal		(5,332)		0
Valuation		(9,988)		61,822
Others		856		(3,589)
Ending Balance		497,816		502,300
Current Financial assets at fair value through other comprehensive income category
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Valuation		0		0
Others		0		0
Ending Balance		0		0
Non-Current Financial assets at fair value through other comprehensive income category
Changes in financial assets at fair value through other comprehensive income [Line Items]
Beginning balance		502,829		435,107
Acquisition		14,060		9,451
Disposal		(5,332)		0
Valuation		(9,970)		61,860
Others		856		(3,589)
Ending Balance		₩ 502,443		₩ 502,829
[1]The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.

Financial Assets at Fair Valu_8

Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Financial Assets at Fair Value Through Other Comprehensive Income (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Financial assets at fair value through other comprehensive income [Line Items]
Acquisition Cost		₩ 625,418		₩ 594,355
Book value		502,443		502,829		₩ 435,107
Fair value		502,443		502,829
Listed equity securities
Financial assets at fair value through other comprehensive income [Line Items]
Acquisition Cost		325,220		324,790
Book value		285,054		300,057		273,826
Fair value		₩ 285,054		₩ 300,057
Korea District Heating Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		2,264,068		2,264,068
Ownership		19.55%		19.55%
Acquisition Cost		₩ 173,201		₩ 173,201
Book value		55,356		64,526
Fair value		₩ 55,356		₩ 64,526
KG Mobility Co., Ltd. (formerly, Ssangyong Motor Co., Ltd.)
Financial assets at fair value through other comprehensive income [Line Items]
Shares		12,205		12,205
Ownership		0.01%		0.03%
Acquisition Cost		₩ 428		₩ 428
Book value		106		107
Fair value		₩ 106		₩ 107
SM Korea Line Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		180		180
Ownership		0%		0%
Acquisition Cost		₩ 1		₩ 1
Book value		0		0
Fair value		₩ 0		₩ 0
Namkwang Engineering & Construction Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		46		121
Ownership		0%		0%
Acquisition Cost		₩ 15		₩ 15
Book value		0		0
Fair value		₩ 0		₩ 0
Bumyang Construction Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		35		35
Ownership		0%		0%
Acquisition Cost		₩ 2		₩ 2
Book value		0		0
Fair value		₩ 0		₩ 0
ELCOMTEC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		32,875		32,875
Ownership		0.04%		0.04%
Acquisition Cost		₩ 217		₩ 217
Book value		43		34
Fair value		₩ 43		₩ 34
PAN Ocean Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		1,492		1,492
Ownership		0%		0%
Acquisition Cost		₩ 14		₩ 14
Book value		6		9
Fair value		₩ 6		₩ 9
STX Heavy Industries Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		68,874		7,419
Ownership		0.24%		0.03%
Acquisition Cost		₩ 537		₩ 107
Book value		806		54
Fair value		₩ 806		₩ 54
Codes Combine Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		291		291
Ownership		0%		0%
Acquisition Cost		₩ 1		₩ 1
Book value		1		1
Fair value		₩ 1		₩ 1
PT Adaro Energy Tbk.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		480,000,000		480,000,000
Ownership		1.50%		1.50%
Acquisition Cost		₩ 65,028		₩ 65,028
Book value		95,505		149,503
Fair value		₩ 95,505		₩ 149,503
Denison Mines Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		58,284,000		58,284,000
Ownership		6.54%		7.09%
Acquisition Cost		₩ 84,134		₩ 84,134
Book value		131,790		84,502
Fair value		₩ 131,790		₩ 84,502
Fission Uranium Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		100,000		100,000
Ownership		0.01%		1.73%
Acquisition Cost		₩ 41		₩ 41
Book value		105		75
Fair value		₩ 105		₩ 75
SangSangin Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		1,457		5,831
Ownership		0.01%		0.01%
Acquisition Cost		₩ 38		₩ 38
Book value		3		3
Fair value		₩ 3		₩ 3
Vitzosys Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		399		399
Ownership		0%		0%
Acquisition Cost		₩ 2		₩ 2
Book value		0		0
Fair value		₩ 0		₩ 0
EMnI Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		628		628
Ownership		0%		0%
Acquisition Cost		₩ 25		₩ 25
Book value		1		3
Fair value		₩ 1		₩ 3
Vissem electronics, Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares		301		229
Ownership		0%		0%
Acquisition Cost		₩ 11		₩ 11
Book value		1		1
Fair value		₩ 1		₩ 1
KC Industry Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares		139		139
Ownership		0%		0%
Acquisition Cost		₩ 6		₩ 6
Book value		0		0
Fair value		₩ 0		₩ 0
Ihsung CNI Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares		142,860		142,860
Ownership		4.81%		4.81%
Acquisition Cost		₩ 1,500		₩ 1,500
Book value		1,327		1,229
Fair value		₩ 1,327		₩ 1,229
Aone Alform Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares		2,672		2,672
Ownership		0.04%		0.04%
Acquisition Cost		₩ 19		₩ 19
Book value		4		10
Fair value		₩ 4		10
BDI Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[1]	6,390,478
Ownership	[1]	32.54%
Acquisition Cost	[1]	₩ 0
Book value	[1]	0
Fair value	[1]	0
Unlisted equity securities
Financial assets at fair value through other comprehensive income [Line Items]
Acquisition Cost	[2]	295,627		269,065
Book value		212,762	[2]	202,243	[2]	₩ 160,790
Fair value	[2]	₩ 212,762		₩ 202,243
Intellectual Discovery Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			200,000
Ownership	[2]			6%
Acquisition Cost	[2]			₩ 5,000
Book value	[2]			954
Fair value	[2]			₩ 954
Hwan Young Steel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	10,916		10,916
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 1,092		₩ 1,092
Book value	[2]	97		97
Fair value	[2]	₩ 97		₩ 97
SAMBO AUTO. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15,066		15,066
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 38		₩ 38
Book value	[2]	38		38
Fair value	[2]	₩ 38		₩ 38
Mobo Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	504		504
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
Dae Kwang Semiconductor Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	589		589
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Sanbon Department Store
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	828		828
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 124		₩ 124
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Miju Steel Mfg. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,097		1,097
Ownership	[2]	0.23%		0.23%
Acquisition Cost	[2]	₩ 50		₩ 50
Book value	[2]	50		50
Fair value	[2]	₩ 50		₩ 50
Sungwon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	117		117
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 29		₩ 29
Book value	[2]	29		29
Fair value	[2]	₩ 29		₩ 29
IMHWA Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	329		329
Ownership	[2]	0.11%		0.11%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
DALIM Special Vehicle Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	58		58
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Moonkyung Silica Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	42		42
Ownership	[2]	0.56%		0.56%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Sungkwang Timber Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3		3
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
KS Remicon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	12		12
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Joongang Platec Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3,591		3,591
Ownership	[2]	0.75%		0.75%
Acquisition Cost	[2]	₩ 72		₩ 72
Book value	[2]	35		35
Fair value	[2]	₩ 35		₩ 35
Pyungsan SI Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	434		434
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Samgong Development Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	12		12
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Joongang Development Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	540		540
Ownership	[2]	0.12%		0.12%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Newasia Co., Ltd. (formerly, AJS Co., Ltd.)
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	12,906		12,906
Ownership	[2]	0.23%		0.23%
Acquisition Cost	[2]	₩ 32		₩ 32
Book value	[2]	32		32
Fair value	[2]	₩ 32		₩ 32
MSE Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	429		429
Ownership	[2]	0.13%		0.13%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Ilrim Nano Tec Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,520		1,520
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Ilsuk Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	152		152
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Zyle Daewoo Motor Sales Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	22		22
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Daewoo Development Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8		8
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Seyang Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	537		537
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 27		₩ 27
Book value	[2]	30		30
Fair value	[2]	₩ 30		₩ 30
Seungri Enterprise Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	93		93
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Shin-E P&C Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,569		1,569
Ownership	[2]	0.64%		0.64%
Acquisition Cost	[2]	₩ 110		₩ 110
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Ejung Ad Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	132		132
Ownership	[2]	0.09%		0.09%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Solvus Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,056		1,056
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Myung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	89		89
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Biwang Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	406		406
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Young Sung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	89		89
Ownership	[2]	0.40%		0.40%
Acquisition Cost	[2]	₩ 26		₩ 26
Book value	[2]	26		26
Fair value	[2]	₩ 26		₩ 26
Yuil Industrial Electronics Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	804		804
Ownership	[2]	0.32%		0.32%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Woojin Industry Corporation
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3		3
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 16		₩ 16
Book value	[2]	16		16
Fair value	[2]	₩ 16		₩ 16
Kwang Sung Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	325		325
Ownership	[2]	0.35%		0.35%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Futech Mold Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	274		274
Ownership	[2]	0.27%		0.27%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
Woojoo Environment Ind. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	101		101
Ownership	[2]	0.11%		0.11%
Acquisition Cost	[2]	₩ 13		₩ 13
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
Hyungji Esquire Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	61		61
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Morado Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	209		209
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Myung Sung Tex Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	20		20
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Kwang Sung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	610		610
Ownership	[2]	0.53%		0.53%
Acquisition Cost	[2]	₩ 31		₩ 31
Book value	[2]	31		31
Fair value	[2]	₩ 31		₩ 31
Seen Business and Technology Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	29,424		29,424
Ownership	[2]	0.73%		0.73%
Acquisition Cost	[2]	₩ 148		₩ 148
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Woobang Construction Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8		8
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Shin Pyung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	6		6
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
JMC Heavy Industries Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,724		2,724
Ownership	[2]	0.10%		0.10%
Acquisition Cost	[2]	₩ 27		₩ 27
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Najin Steel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	37		37
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Sinkwang Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,091		1,091
Ownership	[2]	1.68%		1.68%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Elephant & Friends Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	563		563
Ownership	[2]	0.61%		0.61%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Mireco Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	109		109
Ownership	[2]	0.25%		0.25%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	11		11
Fair value	[2]	₩ 11		₩ 11
L&K Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,615		1,615
Ownership	[2]	0.60%		0.60%
Acquisition Cost	[2]	₩ 24		₩ 24
Book value	[2]	24		24
Fair value	[2]	₩ 24		₩ 24
JO Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,263		1,263
Ownership	[2]	0.62%		0.62%
Acquisition Cost	[2]	₩ 25		₩ 25
Book value	[2]	25		25
Fair value	[2]	₩ 25		₩ 25
Kendae Printing Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	422		422
Ownership	[2]	0.60%		0.60%
Acquisition Cost	[2]	₩ 21		₩ 21
Book value	[2]	21		21
Fair value	[2]	₩ 21		₩ 21
Dauning Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	231		231
Ownership	[2]	0.41%		0.41%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Korea Trecision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	22		22
Ownership	[2]	0.45%		0.45%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Hurim Biocell Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,021		1,021
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Smart Power Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			133,333
Ownership	[2]			4.14%
Acquisition Cost	[2]			₩ 200
Book value	[2]			200
Fair value	[2]			₩ 200
Sunjin Power Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4,941		4,941
Ownership	[2]	0.92%		0.92%
Acquisition Cost	[2]	₩ 247		₩ 247
Book value	[2]	32		32
Fair value	[2]	₩ 32		₩ 32
Beer Yeast Korea Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,388		1,388
Ownership	[2]	0.43%		0.43%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
B CON Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	96		96
Ownership	[2]	1.16%		1.16%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Ace Integration Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	105		105
Ownership	[2]	0.09%		0.09%
Acquisition Cost	[2]	₩ 24		₩ 24
Book value	[2]	24		24
Fair value	[2]	₩ 24		₩ 24
AceInti Agricultural Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16		16
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
KyungDong Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	130		130
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
ChunWon Development Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	193		193
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 39		₩ 39
Book value	[2]	39		39
Fair value	[2]	₩ 39		₩ 39
SungLim Industrial Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	29		29
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Korea Minerals Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	191		191
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 134		₩ 134
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
HyoDong Development Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	128		128
Ownership	[2]	0.16%		0.16%
Acquisition Cost	[2]	₩ 25		₩ 25
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
JoHyun Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	350		350
Ownership	[2]	1.56%		1.56%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
KC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5,107		5,107
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 26		₩ 26
Book value	[2]	26		26
Fair value	[2]	₩ 26		₩ 26
SeongJi Industrial Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	41		41
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Seyang Precision Ind.Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	829		829
Ownership	[2]	0.23%		0.23%
Acquisition Cost	[2]	₩ 41		₩ 41
Book value	[2]	41		41
Fair value	[2]	₩ 41		₩ 41
Dooriwon Food System Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	13		13
Ownership	[2]	0.27%		0.27%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Sung Kwang Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	23		23
Ownership	[2]	0.37%		0.37%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Shinheung Petrol. Co. Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	699		699
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 35		₩ 35
Book value	[2]	35		35
Fair value	[2]	₩ 35		₩ 35
Force TEC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			3,501
Ownership	[2]			0.02%
Acquisition Cost	[2]			₩ 18
Book value	[2]			18
Fair value	[2]			₩ 18
Samsung Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	486		486
Ownership	[2]	1.28%		1.28%
Acquisition Cost	[2]	₩ 97		₩ 97
Book value	[2]	36		36
Fair value	[2]	₩ 36		₩ 36
Younil Metal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	41		41
Ownership	[2]	0.21%		0.21%
Acquisition Cost	[2]	₩ 21		₩ 21
Book value	[2]	21		21
Fair value	[2]	₩ 21		₩ 21
Sevenvalley JC (formerly, CJ Paradise Co., Ltd.)
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	24		24
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 12		₩ 12
Book value	[2]	12		12
Fair value	[2]	₩ 12		₩ 12
Han Young Technology Company Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	35		35
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Ptotronics Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	843		843
Ownership	[2]	0.42%		0.42%
Acquisition Cost	[2]	₩ 84		₩ 84
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
NFT Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	136		136
Ownership	[2]	0.40%		0.40%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Hyundaitech Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,363		1,363
Ownership	[2]	0.87%		0.87%
Acquisition Cost	[2]	₩ 27		₩ 27
Book value	[2]	27		27
Fair value	[2]	₩ 27		₩ 27
Dasan Material Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	29		29
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Fish World Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	47		47
Ownership	[2]	0.21%		0.21%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
SG Shinsung Engineering and Construction Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	10		10
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Samdo Industry Electric Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	48		48
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Taejung Industries Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9,268		9,268
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Shinsei Trading Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	64		64
Ownership	[2]	0.72%		0.72%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Dynamic Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	111		111
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Green Alchemy Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	38,202		38,202
Ownership	[2]	1.48%		1.48%
Acquisition Cost	[2]	₩ 191		₩ 191
Book value	[2]	17		17
Fair value	[2]	₩ 17		₩ 17
Youone TBM Engineering & Construction Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			615
Ownership	[2]			0.27%
Acquisition Cost	[2]			₩ 31
Book value	[2]			31
Fair value	[2]			₩ 31
KM Leatech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,648		1,648
Ownership	[2]	0.98%		0.98%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Semist Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	555		555
Ownership	[2]	0.80%		0.80%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Sewon Bus Co.,Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	12		12
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Enertec Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	7,937		7,937
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 44		₩ 44
Book value	[2]	44		44
Fair value	[2]	₩ 44		₩ 44
Sangji Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	20		20
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Bellie Doughnuts Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	169		169
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
AIRTECH Information communication Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			2,379
Ownership	[2]			0.60%
Acquisition Cost	[2]			₩ 12
Book value	[2]			12
Fair value	[2]			₩ 12
Kiscom Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			1,493
Ownership	[2]			0.04%
Acquisition Cost	[2]			₩ 1
Book value	[2]			1
Fair value	[2]			₩ 1
Set Holding
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,100,220	[3]	1,100,220	[4]
Ownership	[2]	2.50%	[3]	2.50%	[4]
Acquisition Cost	[2]	₩ 229,255	[3]	₩ 229,255	[4]
Book value	[2]	165,923	[3]	163,580	[4]
Fair value	[2]	₩ 165,923	[3]	₩ 163,580	[4]
Choheung packing Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	61		61
Ownership	[2]	0.13%		0.13%
Acquisition Cost	[2]	₩ 12		₩ 12
Book value	[2]	12		12
Fair value	[2]	₩ 12		₩ 12
Jaewoo Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	359		359
Ownership	[2]	0.24%		0.24%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	11		11
Fair value	[2]	₩ 11		₩ 11
Wooyang HC Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,375		1,375
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 159		₩ 159
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
TheYeonriji Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	116		116
Ownership	[2]	0.10%		0.10%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Flusys Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9		9
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
DongSeo Electronics Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	347		347
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 17		₩ 17
Book value	[2]	17		17
Fair value	[2]	₩ 17		₩ 17
Daewoo Display Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	177		177
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
NTS Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	143		143
Ownership	[2]	0.22%		0.22%
Acquisition Cost	[2]	₩ 36		₩ 36
Book value	[2]	36		36
Fair value	[2]	₩ 36		₩ 36
AID CO., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,212		1,212
Ownership	[2]	0.57%		0.57%
Acquisition Cost	[2]	₩ 36		₩ 36
Book value	[2]	36		36
Fair value	[2]	₩ 36		₩ 36
Changwon Eco-friendly farming corp
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3		3
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Kumo Hitech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	6,697		6,697
Ownership	[2]	0.53%		0.53%
Acquisition Cost	[2]	₩ 100		₩ 100
Book value	[2]	32		32
Fair value	[2]	₩ 32		₩ 32
Kyung Pyo Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	186		186
Ownership	[2]	0.76%		0.76%
Acquisition Cost	[2]	₩ 19		₩ 19
Book value	[2]	19		19
Fair value	[2]	₩ 19		₩ 19
Doosung Heavy Industries Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	53		53
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Samjoo Hightech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	522		522
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Samkwang Chemical Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	204		204
Ownership	[2]	1.27%		1.27%
Acquisition Cost	[2]	₩ 51		₩ 51
Book value	[2]	51		51
Fair value	[2]	₩ 51		₩ 51
Shinseung Chemical Industy Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5		5
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 60		₩ 60
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
KJ Alloy Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	368		368
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
SM Hi-tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	22		22
Ownership	[2]	0.39%		0.39%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Puruen Environment Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	967		967
Ownership	[2]	1.34%		1.34%
Acquisition Cost	[2]	₩ 19		₩ 19
Book value	[2]	19		19
Fair value	[2]	₩ 19		₩ 19
Miretech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9,111		9,111
Ownership	[2]	0.27%		0.27%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
Sejin Hightech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	17,980		17,980
Ownership	[2]	0.16%		0.16%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
Eun Sung Enterprise Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,131		1,131
Ownership	[2]	0.72%		0.72%
Acquisition Cost	[2]	₩ 17		₩ 17
Book value	[2]	17		17
Fair value	[2]	₩ 17		₩ 17
Shinyoung Textiles Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	523		523
Ownership	[2]	1.01%		1.01%
Acquisition Cost	[2]	₩ 52		₩ 52
Book value	[2]	23		23
Fair value	[2]	₩ 23		₩ 23
Ilwoo Steel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	41		41
Ownership	[2]	0.28%		0.28%
Acquisition Cost	[2]	₩ 17		₩ 17
Book value	[2]	17		17
Fair value	[2]	₩ 17		₩ 17
Dong-un Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,159		1,159
Ownership	[2]	6.28%		6.28%
Acquisition Cost	[2]	₩ 81		₩ 81
Book value	[2]	34		34
Fair value	[2]	₩ 34		₩ 34
Wongwang Door Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	575		575
Ownership	[2]	1%		1%
Acquisition Cost	[2]	₩ 29		₩ 29
Book value	[2]	29		29
Fair value	[2]	₩ 29		₩ 29
Mansu Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	344		344
Ownership	[2]	0.25%		0.25%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Eanskorea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	39		39
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Youngdongseafood Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	165		165
Ownership	[2]	0.33%		0.33%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Hyunwoo Winstar Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1		1
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Sungchang Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	159		159
Ownership	[2]	0.31%		0.31%
Acquisition Cost	[2]	₩ 19		₩ 19
Book value	[2]	19		19
Fair value	[2]	₩ 19		₩ 19
Yuchang Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	90		90
Ownership	[2]	0.11%		0.11%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Jeongpum Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	322		322
Ownership	[2]	0.35%		0.35%
Acquisition Cost	[2]	₩ 16		₩ 16
Book value	[2]	16		16
Fair value	[2]	₩ 16		₩ 16
Korea Steel Power Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,761		2,761
Ownership	[2]	1.88%		1.88%
Acquisition Cost	[2]	₩ 55		₩ 55
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Amanex Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	10		10
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Dae-A Leisure Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	23		23
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Caffe Bene Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,908		1,908
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Shinjin International Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			4
Ownership	[2]			0.01%
Acquisition Cost	[2]			₩ 1
Book value	[2]			1
Fair value	[2]			₩ 1
Jinhung Packaging Co.,Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4,329		4,329
Ownership	[2]	3.02%		3.02%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Donglim Eng Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	26		26
Ownership	[2]	0.11%		0.11%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
SIP Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	274		274
Ownership	[2]	0.55%		0.55%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Clizen Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			615
Ownership	[2]			0.34%
Acquisition Cost	[2]			₩ 31
Book value	[2]			31
Fair value	[2]			₩ 31
Daeji Product Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15		15
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
SSET Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	181		181
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
Sewon PM Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	963		963
Ownership	[2]	1.11%		1.11%
Acquisition Cost	[2]	₩ 48		₩ 48
Book value	[2]	48		48
Fair value	[2]	₩ 48		₩ 48
Dawon Yuhwa Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	506		506
Ownership	[2]	1.94%		1.94%
Acquisition Cost	[2]	₩ 25		₩ 25
Book value	[2]	25		25
Fair value	[2]	₩ 25		₩ 25
Ogokbaekkwa Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			101
Ownership	[2]			0.12%
Acquisition Cost	[2]			₩ 1
Book value	[2]			1
Fair value	[2]			₩ 1
Ewon materials Co., Ltd. (formerly, Shinwoo Toptech Co., Ltd.)
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	834		834
Ownership	[2]	0.51%		0.51%
Acquisition Cost	[2]	₩ 83		₩ 83
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
KMLC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	281		281
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Seinfood Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	13		13
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
TaeSung Eco-Tech. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,368		1,368
Ownership	[2]	4.55%		4.55%
Acquisition Cost	[2]	₩ 34		₩ 34
Book value	[2]	34		34
Fair value	[2]	₩ 34		₩ 34
Kukex Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	639		639
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Youngshin Plus Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	104		104
Ownership	[2]	0.12%		0.12%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Chang won Engineering Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	22		22
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Samsung Silup Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	47		47
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Samwon Bio Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	390		390
Ownership	[2]	0.25%		0.25%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
IZU KOREA Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	48		48
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Dongdo CNP Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	234		234
Ownership	[2]	0.36%		0.36%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Dae Bang Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			115
Ownership	[2]			0.13%
Acquisition Cost	[2]			₩ 6
Book value	[2]			6
Fair value	[2]			₩ 6
S.I.T. Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,213		2,213
Ownership	[2]	0.44%		0.44%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Taejin Hiech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	78		78
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Headone Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	69		69
Ownership	[2]	0.12%		0.12%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
E-Won Solutech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	158		158
Ownership	[2]	0.16%		0.16%
Acquisition Cost	[2]	₩ 40		₩ 40
Book value	[2]	40		40
Fair value	[2]	₩ 40		₩ 40
KPL Circuit Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	283		283
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
Road Solar Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	12		12
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Han Mi Flexible Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	143		143
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 43		₩ 43
Book value	[2]	43		43
Fair value	[2]	₩ 43		₩ 43
Millennium PNT Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	227		227
Ownership	[2]	0.37%		0.37%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
GN Chem Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			40
Ownership	[2]			0.07%
Acquisition Cost	[2]			₩ 1
Book value	[2]			1
Fair value	[2]			₩ 1
Dae Myung Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	114		114
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Nanomicart Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			176
Ownership	[2]			1.06%
Acquisition Cost	[2]			₩ 35
Book value	[2]			35
Fair value	[2]			₩ 35
Young San Heavy Industries Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	74		74
Ownership	[2]	0.11%		0.11%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Samchungwon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15		15
Ownership	[2]	0.24%		0.24%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Wooyang Frozen Foods Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	66		66
Ownership	[2]	0.82%		0.82%
Acquisition Cost	[2]	₩ 27		₩ 27
Book value	[2]	27		27
Fair value	[2]	₩ 27		₩ 27
Nanomic Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	94		94
Ownership	[2]	0.63%		0.63%
Acquisition Cost	[2]	₩ 38		₩ 38
Book value	[2]	38		38
Fair value	[2]	₩ 38		₩ 38
Samsung Nonferrous Metal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	89		89
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Daewha Fuel Pump Ind., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	83		83
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Addies Direct Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			1
Ownership	[2]			0%
Acquisition Cost	[2]			₩ 0
Book value	[2]			0
Fair value	[2]			₩ 0
WorldCnM Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	131		131
Ownership	[2]	1.09%		1.09%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Superone Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,585		1,585
Ownership	[2]	1.45%		1.45%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Buyoung Panji Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	478		478
Ownership	[2]	0.44%		0.44%
Acquisition Cost	[2]	₩ 12		₩ 12
Book value	[2]	12		12
Fair value	[2]	₩ 12		₩ 12
International Paint Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	111		111
Ownership	[2]	0.48%		0.48%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	11		11
Fair value	[2]	₩ 11		₩ 11
EI Lighting Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	358		358
Ownership	[2]	0.36%		0.36%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
Hightech Mnp Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			123
Ownership	[2]			0.35%
Acquisition Cost	[2]			₩ 6
Book value	[2]			6
Fair value	[2]			₩ 6
Yooseung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	10		10
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Sungkwang Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	48		48
Ownership	[2]	0.35%		0.35%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Taeyang gasteel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			8
Ownership	[2]			0.02%
Acquisition Cost	[2]			₩ 1
Book value	[2]			1
Fair value	[2]			₩ 1
Ajin KSB Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	204		204
Ownership	[2]	0.31%		0.31%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
Sewon Ceramic Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	530		530
Ownership	[2]	1.01%		1.01%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Choyang Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	465		465
Ownership	[2]	1.01%		1.01%
Acquisition Cost	[2]	₩ 23		₩ 23
Book value	[2]	23		23
Fair value	[2]	₩ 23		₩ 23
TK Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	307		307
Ownership	[2]	0.70%		0.70%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Arari Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	14		14
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
C&S Corporation Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,304		1,304
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 13		₩ 13
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
Global The One of Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	62		62
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Steellife Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	85		85
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
D&C Castech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			330
Ownership	[2]			1.89%
Acquisition Cost	[2]			₩ 25
Book value	[2]			25
Fair value	[2]			₩ 25
Geumhan Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	498		498
Ownership	[2]	0.24%		0.24%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Mokgan Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5		5
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Wenex Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	373		373
Ownership	[2]	0.53%		0.53%
Acquisition Cost	[2]	₩ 19		₩ 19
Book value	[2]	19		19
Fair value	[2]	₩ 19		₩ 19
Sulim Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	30		30
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Shinkwang Engineering
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	24		24
Ownership	[2]	0.36%		0.36%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Ek Cookware Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	60		60
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
KTTW Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	28		28
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Avajar Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,061		1,061
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Woosung I.B. Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	7,071		7,071
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
CAP Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16		16
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
MSM Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	25		25
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Ddpopstyle Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	22		22
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Finemetal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	49		49
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Sungkyeong Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	52		52
Ownership	[2]	0.24%		0.24%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Newko Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	331		331
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Dongsung Mulsan Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	137		137
Ownership	[2]	0.34%		0.34%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
Pizzakorea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	42		42
Ownership	[2]	0.18%		0.18%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Geumdani Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,377		2,377
Ownership	[2]	1.82%		1.82%
Acquisition Cost	[2]	₩ 36		₩ 36
Book value	[2]	36		36
Fair value	[2]	₩ 36		₩ 36
Mezzanine I-pack Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	38		38
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Ltop Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	36		36
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Simile Aluminium Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	428		428
Ownership	[2]	0.31%		0.31%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
GT Tooling Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	604		604
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Team Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4,782		4,782
Ownership	[2]	0.37%		0.37%
Acquisition Cost	[2]	₩ 24		₩ 24
Book value	[2]	24		24
Fair value	[2]	₩ 24		₩ 24
Donghwa TCA Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,012		1,012
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 25		₩ 25
Book value	[2]	25		25
Fair value	[2]	₩ 25		₩ 25
Hankook Piaget Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4		4
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Coco Food Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	648		648
Ownership	[2]	1.24%		1.24%
Acquisition Cost	[2]	₩ 33		₩ 33
Book value	[2]	33		33
Fair value	[2]	₩ 33		₩ 33
Woori Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	102		102
Ownership	[2]	1.05%		1.05%
Acquisition Cost	[2]	₩ 21		₩ 21
Book value	[2]	21		21
Fair value	[2]	₩ 21		₩ 21
Ssangyong Youngweol Plant Service&Engineering Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	83		83
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
SH Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	39		39
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Daeyoung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	75		75
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Chandown Food Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			46
Ownership	[2]			0.14%
Acquisition Cost	[2]			₩ 9
Book value	[2]			9
Fair value	[2]			₩ 9
Getron Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	7,259		7,259
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 37		₩ 37
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Jungmun Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	19		19
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
JM Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	403		403
Ownership	[2]	0.67%		0.67%
Acquisition Cost	[2]	₩ 82		₩ 82
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
SGC Energy Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	580,000		580,000
Ownership	[2]	5%		5%
Acquisition Cost	[2]	₩ 2,900		₩ 2,900
Book value	[2]	6,249		7,856
Fair value	[2]	₩ 6,249		₩ 7,856
Le Soleil KHNP LLC
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	137,600		137,600
Ownership	[2]	19%		19%
Acquisition Cost	[2]	₩ 1,376		₩ 1,376
Book value	[2]	1,376		1,376
Fair value	[2]	₩ 1,376		₩ 1,376
Ihsung CNI Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	127,660		127,660
Ownership	[2]	4.30%		4.30%
Acquisition Cost	[2]	₩ 1,500		₩ 1,500
Book value	[2]	1,937		2,016
Fair value	[2]	₩ 1,937		₩ 2,016
H Robotics Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	903,601		903,601
Ownership	[2]	8.05%		8.05%
Acquisition Cost	[2]	₩ 4,000		₩ 4,000
Book value	[2]	5,639		5,638
Fair value	[2]	₩ 5,639		₩ 5,638
Good Tcells Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	11,364		11,364
Ownership	[2]	0.33%		0.34%
Acquisition Cost	[2]	₩ 500		₩ 500
Book value	[2]	399		347
Fair value	[2]	₩ 399		₩ 347
IPS Bio Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,975		1,975
Ownership	[2]	3.13%		3.13%
Acquisition Cost	[2]	₩ 1,000		₩ 1,000
Book value	[2]	897		843
Fair value	[2]	₩ 897		₩ 843
Nine B Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5,000		5,000
Ownership	[2]	4.96%		4.96%
Acquisition Cost	[2]	₩ 1,000		₩ 1,000
Book value	[2]	1,000		1,000
Fair value	[2]	₩ 1,000		₩ 1,000
Choigang-gujo Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	61		61
Ownership	[2]	0.45%		0.45%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Youngheung Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			101
Ownership	[2]			0.05%
Acquisition Cost	[2]			₩ 5
Book value	[2]			1
Fair value	[2]			₩ 1
Hosungsteel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	323		323
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Uktae IND. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	140		140
Ownership	[2]	0.12%		0.12%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
JFC Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16		16
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Hyundai Tech Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	28		28
Ownership	[2]	0.69%		0.69%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Daeil Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	301		301
Ownership	[2]	0.42%		0.42%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Seohan Food Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			83
Ownership	[2]			0.19%
Acquisition Cost	[2]			₩ 2
Book value	[2]			2
Fair value	[2]			₩ 2
Daehyeon Recycle Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	59		59
Ownership	[2]	0.61%		0.61%
Acquisition Cost	[2]	₩ 12		₩ 12
Book value	[2]	12		12
Fair value	[2]	₩ 12		₩ 12
Metal Link Inc. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	709		709
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 35		₩ 35
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Pipetec Korea Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	50		50
Ownership	[2]	0.07%		0.07%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
SungJin Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	803		803
Ownership	[2]	1.20%		1.20%
Acquisition Cost	[2]	₩ 24		₩ 24
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Yujin E&C Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	29		29
Ownership	[2]	0.18%		0.18%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Daishin Logistics Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	13		13
Ownership	[2]	0.09%		0.09%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
JinSung Engineering Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	18		18
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 18		₩ 18
Book value	[2]	18		18
Fair value	[2]	₩ 18		₩ 18
Yongho Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	157		157
Ownership	[2]	0.22%		0.22%
Acquisition Cost	[2]	₩ 32		₩ 32
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Wow tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	369		369
Ownership	[2]	0.75%		0.75%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	11		11
Fair value	[2]	₩ 11		₩ 11
World Power Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16		16
Ownership	[2]	0.28%		0.28%
Acquisition Cost	[2]	₩ 24		₩ 24
Book value	[2]	24		24
Fair value	[2]	₩ 24		₩ 24
PBM Auto Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,001		1,001
Ownership	[2]	1.06%		1.06%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
K2 Motors Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	54		54
Ownership	[2]	0.28%		0.28%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
CL Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	801		801
Ownership	[2]	2.25%		2.25%
Acquisition Cost	[2]	₩ 40		₩ 40
Book value	[2]	40		40
Fair value	[2]	₩ 40		₩ 40
Mirae Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	39		39
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Gentak Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	301		301
Ownership	[2]	0.31%		0.31%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Sungjin Chemical Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	118		118
Ownership	[2]	0.36%		0.36%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
LMAT Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	198		198
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 20		₩ 20
Book value	[2]	20		20
Fair value	[2]	₩ 20		₩ 20
Poong Lim Industrial Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	25		25
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 38		₩ 38
Book value	[2]	38		38
Fair value	[2]	₩ 38		₩ 38
Dae Sung GeoTech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	631		631
Ownership	[2]	1.28%		1.28%
Acquisition Cost	[2]	₩ 32		₩ 32
Book value	[2]	32		32
Fair value	[2]	₩ 32		₩ 32
Saeheemang Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	756		756
Ownership	[2]	0.60%		0.60%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Hakbong Precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			1,460
Ownership	[2]			1.18%
Acquisition Cost	[2]			₩ 15
Book value	[2]			15
Fair value	[2]			₩ 15
Vornech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	431		431
Ownership	[2]	0.37%		0.37%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Woojin Formtech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	76		76
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Korea Engineer Manufacturing Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	114		114
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Sinwa J&K Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	476		476
Ownership	[2]	0.28%		0.28%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Owon E&G Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	132		132
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Guseong Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	141		141
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Irefarm Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	45		45
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Nam-hae E&C Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			117
Ownership	[2]			0.10%
Acquisition Cost	[2]			₩ 2
Book value	[2]			2
Fair value	[2]			₩ 2
Haenarae Agricultural Corp.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15		15
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
DECO&E Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,261		1,261
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Design Beyond Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	17		17
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
LBK Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8		8
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Duckwon industrial Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	32		32
Ownership	[2]	0.43%		0.43%
Acquisition Cost	[2]	₩ 13		₩ 13
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
ASPT Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	64		64
Ownership	[2]	0.82%		0.82%
Acquisition Cost	[2]	₩ 19		₩ 19
Book value	[2]	19		19
Fair value	[2]	₩ 19		₩ 19
SIMA Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	29		29
Ownership	[2]	0.05%		0.05%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Jingkang Resources Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	90		90
Ownership	[2]	1.57%		1.57%
Acquisition Cost	[2]	₩ 13		₩ 13
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
Eslin Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	39		39
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Shinwon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			275
Ownership	[2]			0.42%
Acquisition Cost	[2]			₩ 19
Book value	[2]			19
Fair value	[2]			₩ 19
CIC Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	96		96
Ownership	[2]	0.54%		0.54%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Orano Expansion
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5,742,405		5,742,405
Ownership	[2]	4.72%		4.72%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Fourever Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	44		44
Ownership	[2]	0.10%		0.10%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Myungil Metal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	80		80
Ownership	[2]	0.10%		0.10%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Daeshin ECM Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	182		182
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Greencarbon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	79		79
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Sunkoo Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4		4
Ownership	[2]	0.10%		0.10%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Jians Construction Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	45		45
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
DH trading Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	891		891
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 178		₩ 178
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Sangsin Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	29		29
Ownership	[2]	0.09%		0.09%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Steel focus Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	154		154
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Kamada Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	437		437
Ownership	[2]	0.33%		0.33%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Fosys Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	19		19
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
GB precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	137		137
Ownership	[2]	0.57%		0.57%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Ewon Art Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	185		185
Ownership	[2]	0.61%		0.61%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
DI Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3		3
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Hans AD Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	33		33
Ownership	[2]	0.35%		0.35%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Chaegim Environment Development Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	158		158
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Daesung Stain Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	32		32
Ownership	[2]	0.32%		0.32%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
YSM Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	281		281
Ownership	[2]	2.07%		2.07%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
Dong In Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			65
Ownership	[2]			0.13%
Acquisition Cost	[2]			₩ 3
Book value	[2]			3
Fair value	[2]			₩ 3
U&I Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	50		50
Ownership	[2]	0.22%		0.22%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
World One Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	401		401
Ownership	[2]	0.58%		0.58%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Yewon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	24		24
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
TSNT Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	119		119
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 24		₩ 24
Book value	[2]	24		24
Fair value	[2]	₩ 24		₩ 24
Shinsung Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	314		314
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 16		₩ 16
Book value	[2]	16		16
Fair value	[2]	₩ 16		₩ 16
Loft Garden Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1		1
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 0		₩ 0
Book value	[2]	0		0
Fair value	[2]	₩ 0		₩ 0
Handon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	74		74
Ownership	[2]	0.25%		0.25%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	11		11
Fair value	[2]	₩ 11		₩ 11
GH Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	82		82
Ownership	[2]	0.22%		0.22%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Daeo Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	13		13
Ownership	[2]	0.23%		0.23%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Bokwang Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	76		76
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Samkum Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	201		201
Ownership	[2]	0.48%		0.48%
Acquisition Cost	[2]	₩ 40		₩ 40
Book value	[2]	40		40
Fair value	[2]	₩ 40		₩ 40
Dyntex Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	75		75
Ownership	[2]	0.28%		0.28%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Mirae Engineering Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	66		66
Ownership	[2]	0.15%		0.15%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Mideumeul-juneun-namu Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			119
Ownership	[2]			0.53%
Acquisition Cost	[2]			₩ 6
Book value	[2]			6
Fair value	[2]			₩ 6
Ilshin Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	36		36
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Magtec Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			28
Ownership	[2]			0%
Acquisition Cost	[2]			₩ 6
Book value	[2]			6
Fair value	[2]			₩ 6
Sukwon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,885		2,885
Ownership	[2]	0.59%		0.59%
Acquisition Cost	[2]	₩ 29		₩ 29
Book value	[2]	29		29
Fair value	[2]	₩ 29		₩ 29
Hae-sung Metal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	159		159
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
White&Clean Foods Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	330		330
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Michang Cable Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,096		1,096
Ownership	[2]	0.13%		0.26%
Acquisition Cost	[2]	₩ 16		₩ 16
Book value	[2]	16		16
Fair value	[2]	₩ 16		₩ 16
G.M Foods Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	57		57
Ownership	[2]	0.16%		0.16%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Wecan Global Inc. Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	165		165
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Daeju Steel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	11		11
Ownership	[2]	0.20%		0.20%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Hyundai Glass Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	860		860
Ownership	[2]	0.83%		0.83%
Acquisition Cost	[2]	₩ 43		₩ 43
Book value	[2]	43		43
Fair value	[2]	₩ 43		₩ 43
MEC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16,468		16,468
Ownership	[2]	1.17%		1.17%
Acquisition Cost	[2]	₩ 41		₩ 41
Book value	[2]	41		41
Fair value	[2]	₩ 41		₩ 41
Daeyeoneco Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	151		151
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 15		₩ 15
Book value	[2]	15		15
Fair value	[2]	₩ 15		₩ 15
Hyesung Cable&Communication Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	762		762
Ownership	[2]	0.39%		0.39%
Acquisition Cost	[2]	₩ 38		₩ 38
Book value	[2]	38		38
Fair value	[2]	₩ 38		₩ 38
Sangjin Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	428		428
Ownership	[2]	0.35%		0.35%
Acquisition Cost	[2]	₩ 21		₩ 21
Book value	[2]	21		21
Fair value	[2]	₩ 21		₩ 21
Topis Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	246		246
Ownership	[2]	0.71%		0.71%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
G & L Tech Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			2
Ownership	[2]			0.06%
Acquisition Cost	[2]			₩ 0
Book value	[2]			0
Fair value	[2]			₩ 0
Cheonhae Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			72
Ownership	[2]			0%
Acquisition Cost	[2]			₩ 2
Book value	[2]			2
Fair value	[2]			₩ 2
Iksan-guwon Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	563		563
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 11		₩ 11
Book value	[2]	11		11
Fair value	[2]	₩ 11		₩ 11
Korea Remicon Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	36		36
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
New Tech Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	23		23
Ownership	[2]	0.15%		0.15%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Segeon Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	124		124
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
MS Tech Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9		9
Ownership	[2]	0.15%		0.15%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
J.I Steel Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	21		21
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
HNT Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	172		172
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Taejin Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	27		27
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Macroad Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	953		953
Ownership	[2]	0.17%		0.17%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Woongjin Energy Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	94		94
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Electric Contractors' Financial Cooperative Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			0
Ownership	[2]			0%
Acquisition Cost	[2]			₩ 39
Book value	[2]			39
Fair value	[2]			₩ 39
Information&Communication Financial Cooperative Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			0
Ownership	[2]			0%
Acquisition Cost	[2]			₩ 15
Book value	[2]			15
Fair value	[2]			₩ 15
Common Computer Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3,856		3,856
Ownership	[2]	1.64%		1.87%
Acquisition Cost	[2]	₩ 1,000		₩ 1,000
Book value	[2]	1,154		1,000
Fair value	[2]	₩ 1,154		₩ 1,000
Fine Powerex Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	72,633		72,633
Ownership	[2]	4.58%		4.92%
Acquisition Cost	[2]	₩ 1,500		₩ 1,500
Book value	[2]	1,772		1,500
Fair value	[2]	₩ 1,772		₩ 1,500
Eunsung Industrial Co., Ltd
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3		3
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
KPE Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	51		51
Ownership	[2]	0.19%		0.19%
Acquisition Cost	[2]	₩ 13		₩ 13
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
Dongbangfarms Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	904		904
Ownership	[2]	0.55%		0.55%
Acquisition Cost	[2]	₩ 41		₩ 41
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Sungdo Pack Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15		15
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Coffeenie Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2		2
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Medi Pharma Plan Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,075		1,075
Ownership	[2]	0.26%		0.26%
Acquisition Cost	[2]	₩ 108		₩ 108
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Woori Ascon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	25		25
Ownership	[2]	0.34%		0.34%
Acquisition Cost	[2]	₩ 10		₩ 10
Book value	[2]	10		10
Fair value	[2]	₩ 10		₩ 10
Dong Shin Hydraulies Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9,460		9,460
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 47		₩ 47
Book value	[2]	47		47
Fair value	[2]	₩ 47		₩ 47
Cheonwoo E.P.S Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	371		371
Ownership	[2]	1.10%		1.10%
Acquisition Cost	[2]	₩ 19		₩ 19
Book value	[2]	19		19
Fair value	[2]	₩ 19		₩ 19
Koa Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,244		1,244
Ownership	[2]	0.77%		0.77%
Acquisition Cost	[2]	₩ 12		₩ 12
Book value	[2]	12		12
Fair value	[2]	₩ 12		₩ 12
Jinwoo Textile Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			91
Ownership	[2]			0.68%
Acquisition Cost	[2]			₩ 9
Book value	[2]			9
Fair value	[2]			₩ 9
SKE Cable Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	120		120
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 6		₩ 6
Book value	[2]	6		6
Fair value	[2]	₩ 6		₩ 6
Hi Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,845		1,845
Ownership	[2]	1.94%		1.94%
Acquisition Cost	[2]	₩ 185		₩ 185
Book value	[2]	185		185
Fair value	[2]	₩ 185		₩ 185
Daeheung Engineering Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	65		65
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Etapol Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,361		1,361
Ownership	[2]	0.54%		0.54%
Acquisition Cost	[2]	₩ 41		₩ 41
Book value	[2]	41		41
Fair value	[2]	₩ 41		₩ 41
Yoongwon Korea Co., Ltd. (formerly, Yoongwon International Co., Ltd.)
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	157		157
Ownership	[2]	1.47%		1.47%
Acquisition Cost	[2]	₩ 31		₩ 31
Book value	[2]	31		31
Fair value	[2]	₩ 31		₩ 31
Avoh CeramicBath Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	173		173
Ownership	[2]	0.14%		0.14%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
Dongyang R.P.F. Industrial Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	59		59
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Yuil Engineering Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	14		14
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Taesan Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	146		146
Ownership	[2]	0.69%		0.69%
Acquisition Cost	[2]	₩ 35		₩ 35
Book value	[2]	35		35
Fair value	[2]	₩ 35		₩ 35
Jico Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			10,581
Ownership	[2]			0.01%
Acquisition Cost	[2]			₩ 26
Book value	[2]			26
Fair value	[2]			₩ 26
K Shipbuilding Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			8,622
Ownership	[2]			0.25%
Acquisition Cost	[2]			₩ 1,078
Book value	[2]			1,078
Fair value	[2]			₩ 1,078
Seokjin E&T Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	81		81
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
Agencore Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	175,779		104,350
Ownership	[2]	8.32%		5.67%
Acquisition Cost	[2]	₩ 2,200		₩ 1,200
Book value	[2]	2,200		1,200
Fair value	[2]	₩ 2,200		₩ 1,200
SamHong Machinery. EMC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	476,192		476,192
Ownership	[2]	8.98%		19.23%
Acquisition Cost	[2]	₩ 5,000		₩ 5,000
Book value	[2]	5,000		5,000
Fair value	[2]	₩ 5,000		₩ 5,000
Thermo Tec Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	446		446
Ownership	[2]	0.03%		0.03%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
DaeYang Hydro Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	6		6
Ownership	[2]	0.02%		0.02%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
SangMoo Steel Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	24		24
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Jungin Distribution Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	17		17
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
TheSun Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	77		77
Ownership	[2]	0.06%		0.06%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Daedong Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			176
Ownership	[2]			0.33%
Acquisition Cost	[2]			₩ 18
Book value	[2]			18
Fair value	[2]			₩ 18
Daewoong and Technology Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	423		423
Ownership	[2]	1.14%		1.14%
Acquisition Cost	[2]	₩ 42		₩ 42
Book value	[2]	42		42
Fair value	[2]	₩ 42		₩ 42
Ebadom Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			361
Ownership	[2]			0.21%
Acquisition Cost	[2]			₩ 58
Book value	[2]			58
Fair value	[2]			₩ 58
ChoungHwa Precise Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	428		428
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 43		₩ 43
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
Snopa Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	458		458
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 5		₩ 5
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
Aloha Factory Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,970		2,970
Ownership	[2]	3.70%		3.61%
Acquisition Cost	[2]	₩ 1,000		₩ 1,000
Book value	[2]	739		1,000
Fair value	[2]	₩ 739		₩ 1,000
Dailyshot Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,695		339
Ownership	[2]	1.85%		1.85%
Acquisition Cost	[2]	₩ 1,001		₩ 1,001
Book value	[2]	1,001		1,001
Fair value	[2]	₩ 1,001		₩ 1,001
Mediquitous Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			5,080
Ownership	[2]			0.69%
Acquisition Cost	[2]			₩ 1,250
Book value	[2]			1,250
Fair value	[2]			₩ 1,250
SKD Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			40
Ownership	[2]			0.28%
Acquisition Cost	[2]			₩ 20
Book value	[2]			20
Fair value	[2]			₩ 20
Samhyup Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	376		376
Ownership	[2]	0.91%		0.91%
Acquisition Cost	[2]	₩ 38		₩ 38
Book value	[2]	38		38
Fair value	[2]	₩ 38		₩ 38
Gogang Aluminum Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	828		828
Ownership	[2]	1.52%		1.52%
Acquisition Cost	[2]	₩ 41		₩ 41
Book value	[2]	41		41
Fair value	[2]	₩ 41		₩ 41
Taekwang Paper Board Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	133		133
Ownership	[2]	0.49%		0.49%
Acquisition Cost	[2]	₩ 23		₩ 23
Book value	[2]	23		23
Fair value	[2]	₩ 23		₩ 23
NY Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	33		33
Ownership	[2]	0.15%		0.15%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Sekwang Precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			394
Ownership	[2]			0.84%
Acquisition Cost	[2]			₩ 79
Book value	[2]			79
Fair value	[2]			₩ 79
Dongbang Metal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,985		1,985
Ownership	[2]	0.32%		0.32%
Acquisition Cost	[2]	₩ 20		₩ 20
Book value	[2]	20		20
Fair value	[2]	₩ 20		₩ 20
Samwang Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	170		170
Ownership	[2]	0.25%		0.25%
Acquisition Cost	[2]	₩ 17		₩ 17
Book value	[2]	17		17
Fair value	[2]	₩ 17		₩ 17
Yurim CNF Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15		15
Ownership	[2]	0.23%		0.23%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
Guseul Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	89		89
Ownership	[2]	0.23%		0.23%
Acquisition Cost	[2]	₩ 9		₩ 9
Book value	[2]	9		9
Fair value	[2]	₩ 9		₩ 9
Gaone International Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	54		54
Ownership	[2]	0.29%		0.29%
Acquisition Cost	[2]	₩ 14		₩ 14
Book value	[2]	14		14
Fair value	[2]	₩ 14		₩ 14
Daekwang Forging Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			1,298
Ownership	[2]			1.99%
Acquisition Cost	[2]			₩ 130
Book value	[2]			130
Fair value	[2]			₩ 130
Dongyang Pratech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	265		265
Ownership	[2]	1.21%		1.21%
Acquisition Cost	[2]	₩ 29		₩ 29
Book value	[2]	29		29
Fair value	[2]	₩ 29		₩ 29
Samjin Placo Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	661		661
Ownership	[2]	0.52%		0.52%
Acquisition Cost	[2]	₩ 33		₩ 33
Book value	[2]	33		33
Fair value	[2]	₩ 33		₩ 33
MS Steel Industrial Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	167		167
Ownership	[2]	0.40%		0.40%
Acquisition Cost	[2]	₩ 8		₩ 8
Book value	[2]	8		8
Fair value	[2]	₩ 8		₩ 8
STS Global Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9		9
Ownership	[2]	0.04%		0.04%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Y Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	855		855
Ownership	[2]	0.65%		0.65%
Acquisition Cost	[2]	₩ 34		₩ 34
Book value	[2]	34		34
Fair value	[2]	₩ 34		₩ 34
CK Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			4,178
Ownership	[2]			7.54%
Acquisition Cost	[2]			₩ 167
Book value	[2]			167
Fair value	[2]			₩ 167
J&J Tech Co.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	14		14
Ownership	[2]	0.22%		0.22%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Shield Board Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	165		165
Ownership	[2]	0.15%		0.15%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
SFC International Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	11		11
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Korea Ocean Machinery Technology Co.,Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			763
Ownership	[2]			0.45%
Acquisition Cost	[2]			₩ 76
Book value	[2]			76
Fair value	[2]			₩ 76
Hana ITM Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8,443		8,443
Ownership	[2]	0.70%		0.70%
Acquisition Cost	[2]	₩ 84		₩ 84
Book value	[2]	84		84
Fair value	[2]	₩ 84		₩ 84
Jeuvis Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	191		191
Ownership	[2]	0.30%		0.30%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
JBM Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	662		662
Ownership	[2]	0.34%		0.34%
Acquisition Cost	[2]	₩ 20		₩ 20
Book value	[2]	20		20
Fair value	[2]	₩ 20		₩ 20
Jungwoo Metal Solution Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	27		27
Ownership	[2]	0.08%		0.08%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
MS Precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	220		220
Ownership	[2]	0.16%		0.16%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
YM Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2		2
Ownership	[2]	0.01%		0.01%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
C&C ENG Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	439		439
Ownership	[2]	1.59%		1.59%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Minjin Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]			24
Ownership	[2]			0.01%
Acquisition Cost	[2]			₩ 1
Book value	[2]			1
Fair value	[2]			₩ 1
Daejoo E&G Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	133		133
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 27		₩ 27
Book value	[2]	27		27
Fair value	[2]	₩ 27		₩ 27
Taeyoung Precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	31		31
Ownership	[2]	0.22%		0.22%
Acquisition Cost	[2]	₩ 1		₩ 1
Book value	[2]	1		1
Fair value	[2]	₩ 1		₩ 1
Shin Heung Precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	93		93
Ownership	[2]	4.63%		4.63%
Acquisition Cost	[2]	₩ 4		₩ 4
Book value	[2]	4		4
Fair value	[2]	₩ 4		₩ 4
TaeGwang PC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	530		530
Ownership	[2]	0.90%		0.90%
Acquisition Cost	[2]	₩ 13		₩ 13
Book value	[2]	13		13
Fair value	[2]	₩ 13		₩ 13
KyeongGwang Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	244		244
Ownership	[2]	1.04%		1.04%
Acquisition Cost	[2]	₩ 7		₩ 7
Book value	[2]	7		7
Fair value	[2]	₩ 7		₩ 7
Altron Jeonju Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	34,846		34,846
Ownership	[2]	1.34%		1.34%
Acquisition Cost	[2]	₩ 697		₩ 697
Book value	[2]	5		5
Fair value	[2]	₩ 5		₩ 5
SKD Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	40
Ownership	[2]	0.28%
Acquisition Cost	[2]	₩ 20
Book value	[2]	20
Fair value	[2]	₩ 20
Moohan Enterprise Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	63
Ownership	[2]	0.12%
Acquisition Cost	[2]	₩ 3
Book value	[2]	3
Fair value	[2]	₩ 3
Value Invest Korea Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8
Ownership	[2]	0%
Acquisition Cost	[2]	₩ 2
Book value	[2]	2
Fair value	[2]	₩ 2
Beomju Co Ltd [Member]
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,037
Ownership	[2]	0.60%
Acquisition Cost	[2]	₩ 42
Book value	[2]	42
Fair value	[2]	₩ 42
C&A Industries Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	42,062
Ownership	[2]	0.26%
Acquisition Cost	[2]	₩ 21
Book value	[2]	21
Fair value	[2]	₩ 21
Vehicle System Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	225
Ownership	[2]	0.19%
Acquisition Cost	[2]	₩ 23
Book value	[2]	23
Fair value	[2]	₩ 23
CH Solution Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,456
Ownership	[2]	0.16%
Acquisition Cost	[2]	₩ 4
Book value	[2]	4
Fair value	[2]	₩ 4
HNT Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8,567
Ownership	[2]	0.09%
Acquisition Cost	[2]	₩ 9
Book value	[2]	9
Fair value	[2]	₩ 9
Sunquen Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4
Ownership	[2]	0.01%
Acquisition Cost	[2]	₩ 0
Book value	[2]	0
Fair value	[2]	₩ 0
Hapdong Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	7,096
Ownership	[2]	1.08%
Acquisition Cost	[2]	₩ 106
Book value	[2]	106
Fair value	[2]	₩ 106
Shabath Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	48
Ownership	[2]	0.04%
Acquisition Cost	[2]	₩ 6
Book value	[2]	6
Fair value	[2]	₩ 6
Woori Elec Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	102
Ownership	[2]	0.17%
Acquisition Cost	[2]	₩ 5
Book value	[2]	5
Fair value	[2]	₩ 5
Dong-Yang Special Casting Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,027
Ownership	[2]	0.41%
Acquisition Cost	[2]	₩ 21
Book value	[2]	21
Fair value	[2]	₩ 21
DYC Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	638
Ownership	[2]	1.73%
Acquisition Cost	[2]	₩ 96
Book value	[2]	96
Fair value	[2]	₩ 96
Haegang Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,687
Ownership	[2]	1.13%
Acquisition Cost	[2]	₩ 25
Book value	[2]	25
Fair value	[2]	₩ 25
Daone Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	860
Ownership	[2]	0.23%
Acquisition Cost	[2]	₩ 9
Book value	[2]	9
Fair value	[2]	₩ 9
Yeowoon Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	3
Ownership	[2]	0%
Acquisition Cost	[2]	₩ 0
Book value	[2]	0
Fair value	[2]	₩ 0
Evertrue Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	15
Ownership	[2]	0%
Acquisition Cost	[2]	₩ 0
Book value	[2]	0
Fair value	[2]	₩ 0
Black Materials Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	37,038
Ownership	[2]	8.31%
Acquisition Cost	[2]	₩ 500
Book value	[2]	500
Fair value	[2]	₩ 500
K Shipbuilding Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8,622
Ownership	[2]	0.25%
Acquisition Cost	[2]	₩ 1,078
Book value	[2]	1,078
Fair value	[2]	₩ 1,078
Seohan Food Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	83
Ownership	[2]	0.19%
Acquisition Cost	[2]	₩ 2
Book value	[2]	2
Fair value	[2]	₩ 2
Andong Trading Corporation Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	42		42
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 2		₩ 2
Book value	[2]	2		2
Fair value	[2]	₩ 2		₩ 2
RMK Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	63		63
Ownership	[2]	0.90%		0.90%
Acquisition Cost	[2]	₩ 22		₩ 22
Book value	[2]	22		22
Fair value	[2]	₩ 22		₩ 22
Shinjin International Corporation Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	4
Ownership	[2]	0.01%
Acquisition Cost	[2]	₩ 1
Book value	[2]	1
Fair value	[2]	₩ 1
Asan Wood
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	6,391
Ownership	[2]	1.03%
Acquisition Cost	[2]	₩ 64
Book value	[2]	64
Fair value	[2]	₩ 64
Seil Textile Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16		16
Ownership	[2]	0.15%		0.15%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
JSL Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	51		51
Ownership	[2]	0.49%		0.49%
Acquisition Cost	[2]	₩ 3		₩ 3
Book value	[2]	3		3
Fair value	[2]	₩ 3		₩ 3
3i Powergen Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	0
Ownership	[2]	15%
Acquisition Cost	[2]	₩ 1,482
Book value	[2]	0
Fair value	[2]	₩ 0
PT. Kedap Sayaaq
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	671
Ownership	[2]	10%
Acquisition Cost	[2]	₩ 18,540
Book value	[2]	0
Fair value	[2]	₩ 0
Mediquitous Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5,080
Ownership	[2]	0.64%
Acquisition Cost	[2]	₩ 1,250
Book value	[2]	1,250
Fair value	[2]	₩ 1,250
Monit Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	166,667
Ownership	[2]	14.29%
Acquisition Cost	[2]	₩ 1,000
Book value	[2]	1,000
Fair value	[2]	₩ 1,000
Enersys Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	9,763
Ownership	[2]	19.62%
Acquisition Cost	[2]	₩ 2,050
Book value	[2]	2,050
Fair value	[2]	₩ 2,050
Kalman Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	23,172
Ownership	[2]	10.02%
Acquisition Cost	[2]	₩ 1,000
Book value	[2]	1,000
Fair value	[2]	₩ 1,000
HiMet Corporation Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,754,386
Ownership	[2]	13.93%
Acquisition Cost	[2]	₩ 5,000
Book value	[2]	5,000
Fair value	[2]	₩ 5,000
Wonil Image Maker Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	16
Ownership	[2]	0.04%
Acquisition Cost	[2]	₩ 0
Book value	[2]	0
Fair value	[2]	₩ 0
Ohbaksa.com Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	52
Ownership	[2]	0.23%
Acquisition Cost	[2]	₩ 3
Book value	[2]	3
Fair value	[2]	₩ 3
Hanyang Electric Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	918
Ownership	[2]	3.27%
Acquisition Cost	[2]	₩ 92
Book value	[2]	92
Fair value	[2]	₩ 92
Geumchang Synthetic Fiber Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	119
Ownership	[2]	1.02%
Acquisition Cost	[2]	₩ 12
Book value	[2]	12
Fair value	[2]	₩ 12
Sung Min Fishery Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	371
Ownership	[2]	0.09%
Acquisition Cost	[2]	₩ 4
Book value	[2]	4
Fair value	[2]	₩ 4
Dreamfact Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	77
Ownership	[2]	0.10%
Acquisition Cost	[2]	₩ 3
Book value	[2]	3
Fair value	[2]	₩ 3
Donyworld Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	125
Ownership	[2]	0.68%
Acquisition Cost	[2]	₩ 10
Book value	[2]	10
Fair value	[2]	₩ 10
Dongsuh Companies Inc.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	18
Ownership	[2]	0.23%
Acquisition Cost	[2]	₩ 2
Book value	[2]	2
Fair value	[2]	₩ 2
Dondodam Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	262
Ownership	[2]	0.34%
Acquisition Cost	[2]	₩ 13
Book value	[2]	13
Fair value	[2]	₩ 13
Vision Food Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,732
Ownership	[2]	1%
Acquisition Cost	[2]	₩ 86
Book value	[2]	86
Fair value	[2]	₩ 86
Aone Metal Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	156
Ownership	[2]	0.89%
Acquisition Cost	[2]	₩ 16
Book value	[2]	16
Fair value	[2]	₩ 16
Ecoplus Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	2,786
Ownership	[2]	0.91%
Acquisition Cost	[2]	₩ 3
Book value	[2]	3
Fair value	[2]	₩ 3
Libechen Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	151
Ownership	[2]	0.13%
Acquisition Cost	[2]	₩ 8
Book value	[2]	8
Fair value	[2]	₩ 8
Hongin Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	18
Ownership	[2]	0.03%
Acquisition Cost	[2]	₩ 5
Book value	[2]	5
Fair value	[2]	₩ 5
Bolim Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	37
Ownership	[2]	0.10%
Acquisition Cost	[2]	₩ 5
Book value	[2]	5
Fair value	[2]	₩ 5
Neo Life Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	19
Ownership	[2]	0.04%
Acquisition Cost	[2]	₩ 0
Book value	[2]	0
Fair value	[2]	₩ 0
Daehong Industry Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	1,152
Ownership	[2]	1.01%
Acquisition Cost	[2]	₩ 85
Book value	[2]	85
Fair value	[2]	₩ 85
T-Eng Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	123
Ownership	[2]	1.05%
Acquisition Cost	[2]	₩ 25
Book value	[2]	25
Fair value	[2]	₩ 25
Badanuri
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	8
Ownership	[2]	0.10%
Acquisition Cost	[2]	₩ 2
Book value	[2]	2
Fair value	[2]	₩ 2
Daeyoung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	178
Ownership	[2]	0.56%
Acquisition Cost	[2]	₩ 63
Book value	[2]	63
Fair value	[2]	₩ 63
Ki Soo Precision Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	325
Ownership	[2]	0.44%
Acquisition Cost	[2]	₩ 98
Book value	[2]	98
Fair value	[2]	₩ 98
DNGV
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	5,516
Ownership	[2]	0.14%
Acquisition Cost	[2]	₩ 11
Book value	[2]	11
Fair value	[2]	₩ 11
BJ Korea
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	446
Ownership	[2]	0.81%
Acquisition Cost	[2]	₩ 40
Book value	[2]	40
Fair value	[2]	₩ 40
R&S Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	291
Ownership	[2]	0.61%
Acquisition Cost	[2]	₩ 4
Book value	[2]	4
Fair value	[2]	₩ 4
Daekyoung Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	85
Ownership	[2]	0.66%
Acquisition Cost	[2]	₩ 17
Book value	[2]	17
Fair value	[2]	₩ 17
Gunsan Bio Energy Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2],[5]	200,000
Ownership	[2],[5]	18.87%
Acquisition Cost	[2],[5]	₩ 1,000
Book value	[2],[5]	0
Fair value	[2],[5]	0
Debt securities [member]
Financial assets at fair value through other comprehensive income [Line Items]
Acquisition Cost	[2]	4,571
Book value	[2]	4,627
Fair value	[2]	₩ 4,627
Aron Flying Ship Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	0		0
Ownership	[2]	0%		0%
Acquisition Cost	[2]	₩ 491		₩ 500
Book value	[2]	547		529
Fair value	[2]	₩ 547		₩ 529
Ino Platech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	0
Ownership	[2]	0%
Acquisition Cost	[2]	₩ 1,080
Book value	[2]	1,080
Fair value	[2]	₩ 1,080
Daebon Tech Co., Ltd.
Financial assets at fair value through other comprehensive income [Line Items]
Shares	[2]	0
Ownership	[2]	0%
Acquisition Cost	[2]	₩ 3,000
Book value	[2]	3,000
Fair value	[2]	₩ 3,000
[1]The shares were acquired through a debt-to-equity conversion during the year ended December 31, 2023, in accordance with the corporate rehabilitation procedures of BDI Co., Ltd. Since the Company has no capacity to exercise significant influence until the rehabilitation procedures are complete, the Company has classified the investment as financial assets measured at fair value through other comprehensive income.[2]The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.[3]The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2023.[4]The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2022.[5]The investee declared bankruptcy during the year ended December 31, 2023. The Company has no capacity to exercise significant influence on the investee due to the receivership of the investee by a trustee in bankruptcy, so the investment was reclassified as financial assets measured at fair value through other comprehensive income.

Financial Assets at Amortized_3

Financial Assets at Amortized Cost - Summary of Financial Assets at Amortized Cost (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financial Assets at Amortized Cost [Line Items]
Financial assets at amortized costs	₩ 38,843	₩ 26,998
Current financial assets at amortized costs	28,905	16,762
Non-current financial assets at amortized costs	9,938	10,236
Gross carrying amount [member]
Financial Assets at Amortized Cost [Line Items]
Financial assets at amortized costs	38,843	26,998
Current financial assets at amortized costs	28,905	16,762
Non-current financial assets at amortized costs	9,938	10,236
Government bonds
Financial Assets at Amortized Cost [Line Items]
Financial assets at amortized costs	1,528	1,920
Government bonds | Gross carrying amount [member]
Financial Assets at Amortized Cost [Line Items]
Financial assets at amortized costs	1,528	1,920
Others
Financial Assets at Amortized Cost [Line Items]
Financial assets at amortized costs	37,315	25,078
Others | Gross carrying amount [member]
Financial Assets at Amortized Cost [Line Items]
Financial assets at amortized costs	₩ 37,315	₩ 25,078

Derivative Instrument - Summary

Derivative Instrument - Summary of Derivative Financial Instruments (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Current derivative financial assets		₩ 307,732	₩ 289,603
Non-current derivative financial assets		692,662	728,421
Current derivative financial liabilities		18,379	44,994
Non-current derivative financial liabilities		433,855	387,757
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		234,199	224,218	₩ 822,994
Net income effects of transaction gain (loss)		89,659	224,685	84,082
Other comprehensive income (loss)	[1]	(8,518)	(65,052)	(40,460)
Currency forward | Not Designated as Hedging Instrument
Derivative [Line Items]
Current derivative financial assets		18,019	648
Non-current derivative financial assets		0	17,432
Current derivative financial liabilities		4,755	32,660
Non-current derivative financial liabilities		0	0
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		510	(20,570)	33,066
Net income effects of transaction gain (loss)		34,216	(2,710)	33,032
Other comprehensive income (loss)	[1]	0	0	0
Currency swap
Derivative [Line Items]
Current derivative financial assets		274,782	236,470
Non-current derivative financial assets		527,701	589,300
Current derivative financial liabilities		6,867	6,319
Non-current derivative financial liabilities		287,824	328,995
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		269,795	155,937	787,264
Net income effects of transaction gain (loss)		38,282	234,195	61,353
Other comprehensive income (loss)	[1]	(11,411)	(102,969)	(59,108)
Currency swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Current derivative financial assets		196,013	102,080
Non-current derivative financial assets		347,689	410,540
Current derivative financial liabilities		6,867	6,319
Non-current derivative financial liabilities		264,260	302,415
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		181,342	(77,618)	420,551
Net income effects of transaction gain (loss)		(1,244)	104,572	16,265
Other comprehensive income (loss)	[1]	0	0	0
Currency swap | Designated as Hedging Instrument
Derivative [Line Items]
Current derivative financial assets		78,769	134,390
Non-current derivative financial assets		180,012	178,760
Current derivative financial liabilities		0	0
Non-current derivative financial liabilities		23,564	26,580
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		88,453	233,555	366,713
Net income effects of transaction gain (loss)		39,526	129,623	45,088
Other comprehensive income (loss)	[1]	(11,411)	(102,969)	(59,108)
Interest rate swap
Derivative [Line Items]
Current derivative financial assets		12,124	52,485
Non-current derivative financial assets		129,570	81,188
Current derivative financial liabilities		0	0
Non-current derivative financial liabilities		48,238	2,735
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		(16,377)	66,341	18,123
Net income effects of transaction gain (loss)		10,400	(6,800)	(10,303)
Other comprehensive income (loss)	[1]	2,893	37,917	18,648
Interest rate swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Current derivative financial assets		12,124	52,485
Non-current derivative financial assets		129,570	81,188
Current derivative financial liabilities		0	0
Non-current derivative financial liabilities		48,238	2,735
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		(16,377)	66,341	18,123
Net income effects of transaction gain (loss)		10,400	(6,800)	(10,303)
Other comprehensive income (loss)	[1]	0	0	0
Interest rate swap | Designated as Hedging Instrument
Derivative [Line Items]
Current derivative financial assets		0	0
Non-current derivative financial assets		0	0
Current derivative financial liabilities		0	0
Non-current derivative financial liabilities		0	0
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		0	0	0
Net income effects of transaction gain (loss)		0	0	0
Other comprehensive income (loss)	[1]	2,893	37,917	18,648
Others | Not Designated as Hedging Instrument
Derivative [Line Items]
Current derivative financial assets	[2],[3]	2,807	0
Non-current derivative financial assets	[2],[3]	35,391	40,501
Current derivative financial liabilities	[2],[4]	6,757	6,015
Non-current derivative financial liabilities	[2],[4]	97,793	56,027
Disclosure of Gain and loss on valuation and transaction of derivatives and included in finance income and costs in the consolidated statements of comprehensive income (loss)
Net income effects of valuation gain (loss)		(19,729)	22,510	(15,459)
Net income effects of transaction gain (loss)		6,761	0	0
Other comprehensive income (loss)	[1]	₩ 0	₩ 0	₩ 0
[1]For the years ended December 31, 2021, 2022 and 2023, the net loss on valuation of derivatives applying cash flow hedge accounting of ￦15,778 million, ￦24,415 million and ￦3,654 million, net of tax, are included in other comprehensive loss, respectively.[2]The Company recorded the fair value of derivatives in accordance with the shareholders’ agreement of its associate, Hyundai Green Power Co., Ltd., as other derivatives. In addition, the fair value of the derivatives regarding the power sales agreement of its subsidiary, Elara Energy Project, LLC, were recorded as other derivatives.[3]The Company recorded the fair value of derivatives regarding the Power Purchase Agreement (“PPA”) of its subsidiary Columboola Solar Farm Hold Co Pty., Ltd. as other derivatives.[4]In relation to the agreement to purchase hybrid securities issued by Samcheok Eco Materials Co., Ltd., an associate of the Company, the Company has recognized as other derivative liabilities the fair value of ￦18,752 million for its performance obligation to the underwriter of the bonds. In addition, the Company has granted stock option to Chester Solar IV SpA, a joint venture of the Company, and 4 other third party investors, and recorded the related fair value of ￦5,986 million (prior year : ￦6,197 million) as other derivative liabilities.

Derivative Instrument - Summa_2

Derivative Instrument - Summary of Derivative Financial Instruments (Parenthetical) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Net gain on valuation of derivatives designated as cash flow hedge	₩ 3,654	₩ 24,415	₩ 15,778
Non-current derivative financial liabilities	433,855	387,757
Hybrid Bonds [member]
Derivative [Line Items]
Non-current derivative financial liabilities	18,752
Derivative financial liabilities held for trading	₩ 5,986	₩ 6,197

Derivatives - Summary of Deriva

Derivatives - Summary of Derivative Currency Swap Forward Contract List (Details) - 12 months ended Dec. 31, 2023 - Currency forward contracts $ in Thousands, ₩ in Millions	KRW (₩)	USD ($)
Disclosure of Derivative Currency forward contract detail list [Line Items]
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 08, 2023	Dec. 08, 2023
Maturity date	Jan. 05, 2024	Jan. 05, 2024
Contract Amounts Pay | ₩	₩ 41,535
Contract Amounts Receive | $		$ 29,419
Contract exchange rate	1,411.83	1,411.83
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 13, 2023	Dec. 13, 2023
Maturity date	Jan. 03, 2024	Jan. 03, 2024
Contract Amounts Pay | ₩	₩ 13,131
Contract Amounts Receive | $		$ 10,000
Contract exchange rate	1,313.1	1,313.1
Derivative Counterparty	Busan Bank	Busan Bank
Contract date	Dec. 14, 2023	Dec. 14, 2023
Maturity date	Jan. 05, 2024	Jan. 05, 2024
Contract Amounts Pay | ₩	₩ 18,126
Contract Amounts Receive | $		$ 14,000
Contract exchange rate	1,294.7	1,294.7
Derivative Counterparty	Woori Bank	Woori Bank
Contract date	Dec. 14, 2023	Dec. 14, 2023
Maturity date	Jan. 09, 2024	Jan. 09, 2024
Contract Amounts Pay | ₩	₩ 18,092
Contract Amounts Receive | $		$ 14,000
Contract exchange rate	1,292.3	1,292.3
Derivative Counterparty	Standard Chartered	Standard Chartered
Contract date	Dec. 18, 2023	Dec. 18, 2023
Maturity date	Jan. 11, 2024	Jan. 11, 2024
Contract Amounts Pay | ₩	₩ 6,480
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,295.9	1,295.9
Derivative Counterparty	Korea Development Bank	Korea Development Bank
Contract date	Dec. 20, 2023	Dec. 20, 2023
Maturity date	Jan. 15, 2024	Jan. 15, 2024
Contract Amounts Pay | ₩	₩ 10,383
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,297.9	1,297.9
Derivative Counterparty	Shinhan Bank	Shinhan Bank
Contract date	Dec. 20, 2023	Dec. 20, 2023
Maturity date	Jan. 17, 2024	Jan. 17, 2024
Contract Amounts Pay | ₩	₩ 9,074
Contract Amounts Receive | $		$ 7,000
Contract exchange rate	1,296.4	1,296.4
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 21, 2023	Dec. 21, 2023
Maturity date	Jan. 19, 2024	Jan. 19, 2024
Contract Amounts Pay | ₩	₩ 16,929
Contract Amounts Receive | $		$ 13,000
Contract exchange rate	1,302.2	1,302.2
Derivative Counterparty	Hana Bank	Hana Bank
Contract date	Dec. 21, 2023	Dec. 21, 2023
Maturity date	Jan. 12, 2024	Jan. 12, 2024
Contract Amounts Pay | ₩	₩ 14,329
Contract Amounts Receive | $		$ 11,000
Contract exchange rate	1,302.6	1,302.6
Derivative Counterparty	Kookmin Bank	Kookmin Bank
Contract date	Dec. 21, 2023	Dec. 21, 2023
Maturity date	Jan. 23, 2024	Jan. 23, 2024
Contract Amounts Pay | ₩	₩ 14,324
Contract Amounts Receive | $		$ 11,000
Contract exchange rate	1,302.2	1,302.2
Derivative Counterparty	Mizuho Bank	Mizuho Bank
Contract date	Dec. 22, 2023	Dec. 22, 2023
Maturity date	Jan. 25, 2024	Jan. 25, 2024
Contract Amounts Pay | ₩	₩ 10,382
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,297.7	1,297.7
Derivative Counterparty	Standard Chartered	Standard Chartered
Contract date	Dec. 26, 2023	Dec. 26, 2023
Maturity date	Jan. 26, 2024	Jan. 26, 2024
Contract Amounts Pay | ₩	₩ 10,382
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,297.7	1,297.7
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Jan. 29, 2024	Jan. 29, 2024
Contract Amounts Pay | ₩	₩ 6,446
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,289.2	1,289.2
Derivative Counterparty	Morgan Stanley	Morgan Stanley
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Jan. 31, 2024	Jan. 31, 2024
Contract Amounts Pay | ₩	₩ 14,159
Contract Amounts Receive | $		$ 11,000
Contract exchange rate	1,287.2	1,287.2
Derivative Counterparty	Busan Bank	Busan Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Feb. 02, 2024	Feb. 02, 2024
Contract Amounts Pay | ₩	₩ 10,296
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,287	1,287
Derivative Counterparty	Woori Bank	Woori Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Feb. 05, 2024	Feb. 05, 2024
Contract Amounts Pay | ₩	₩ 10,298
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,287.2	1,287.2
Derivative Counterparty	MUFG	MUFG
Contract date	Nov. 23, 2023	Nov. 23, 2023
Maturity date	Feb. 05, 2024	Feb. 05, 2024
Contract Amounts Pay | ₩	₩ 10,348
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,293.5	1,293.5
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Nov. 30, 2023	Nov. 30, 2023
Maturity date	Jan. 23, 2024	Jan. 23, 2024
Contract Amounts Pay | ₩	₩ 5,147
Contract Amounts Receive | $		$ 4,000
Contract exchange rate	1,286.75	1,286.75
Derivative Counterparty	MUFG	MUFG
Contract date	Nov. 30, 2023	Nov. 30, 2023
Maturity date	Jan. 23, 2024	Jan. 23, 2024
Contract Amounts Pay | ₩	₩ 5,147
Contract Amounts Receive | $		$ 4,000
Contract exchange rate	1,286.65	1,286.65
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Nov. 30, 2023	Nov. 30, 2023
Maturity date	Feb. 22, 2024	Feb. 22, 2024
Contract Amounts Pay | ₩	₩ 11,561
Contract Amounts Receive | $		$ 9,000
Contract exchange rate	1,284.6	1,284.6
Derivative Counterparty	Morgan Stanley	Morgan Stanley
Contract date	Dec. 01, 2023	Dec. 01, 2023
Maturity date	Jan. 23, 2024	Jan. 23, 2024
Contract Amounts Pay | ₩	₩ 5,199
Contract Amounts Receive | $		$ 4,000
Contract exchange rate	1,299.85	1,299.85
Derivative Counterparty	Korea Development Bank	Korea Development Bank
Contract date	Dec. 01, 2023	Dec. 01, 2023
Maturity date	Jan. 15, 2024	Jan. 15, 2024
Contract Amounts Pay | ₩	₩ 14,303
Contract Amounts Receive | $		$ 11,000
Contract exchange rate	1,300.3	1,300.3
Derivative Counterparty	Mizuho Bank	Mizuho Bank
Contract date	Dec. 01, 2023	Dec. 01, 2023
Maturity date	Feb. 14, 2024	Feb. 14, 2024
Contract Amounts Pay | ₩	₩ 10,386
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,298.25	1,298.25
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 04, 2023	Dec. 04, 2023
Maturity date	Feb. 14, 2024	Feb. 14, 2024
Contract Amounts Pay | ₩	₩ 6,485
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,296.9	1,296.9
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Dec. 06, 2023	Dec. 06, 2023
Maturity date	Feb. 14, 2024	Feb. 14, 2024
Contract Amounts Pay | ₩	₩ 5,231
Contract Amounts Receive | $		$ 4,000
Contract exchange rate	1,307.75	1,307.75
Derivative Counterparty	MUFG	MUFG
Contract date	Dec. 13, 2023	Dec. 13, 2023
Maturity date	Feb. 06, 2024	Feb. 06, 2024
Contract Amounts Pay | ₩	₩ 19,700
Contract Amounts Receive | $		$ 15,000
Contract exchange rate	1,313.3	1,313.3
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 13, 2023	Dec. 13, 2023
Maturity date	Feb. 06, 2024	Feb. 06, 2024
Contract Amounts Pay | ₩	₩ 17,072
Contract Amounts Receive | $		$ 13,000
Contract exchange rate	1,313.2	1,313.2
Derivative Counterparty	Mizuho Bank	Mizuho Bank
Contract date	Dec. 15, 2023	Dec. 15, 2023
Maturity date	Feb. 06, 2024	Feb. 06, 2024
Contract Amounts Pay | ₩	₩ 12,916
Contract Amounts Receive | $		$ 10,000
Contract exchange rate	1,291.55	1,291.55
Derivative Counterparty	Korea Development Bank	Korea Development Bank
Contract date	Dec. 15, 2023	Dec. 15, 2023
Maturity date	Feb. 14, 2024	Feb. 14, 2024
Contract Amounts Pay | ₩	₩ 11,617
Contract Amounts Receive | $		$ 9,000
Contract exchange rate	1,290.8	1,290.8
Derivative Counterparty	Busan Bank	Busan Bank
Contract date	Dec. 20, 2023	Dec. 20, 2023
Maturity date	Feb. 26, 2024	Feb. 26, 2024
Contract Amounts Pay | ₩	₩ 5,183
Contract Amounts Receive | $		$ 4,000
Contract exchange rate	1,295.8	1,295.8
Derivative Counterparty	SMBC	SMBC
Contract date	Dec. 20, 2023	Dec. 20, 2023
Maturity date	Mar. 13, 2024	Mar. 13, 2024
Contract Amounts Pay | ₩	₩ 19,416
Contract Amounts Receive | $		$ 15,000
Contract exchange rate	1,294.43	1,294.43
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Dec. 21, 2023	Dec. 21, 2023
Maturity date	Jan. 05, 2024	Jan. 05, 2024
Contract Amounts Pay | ₩	₩ 26,065
Contract Amounts Receive | $		$ 20,000
Contract exchange rate	1,303.25	1,303.25
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 21, 2023	Dec. 21, 2023
Maturity date	Jan. 05, 2024	Jan. 05, 2024
Contract Amounts Pay | ₩	₩ 26,064
Contract Amounts Receive | $		$ 20,000
Contract exchange rate	1,303.2	1,303.2
Derivative Counterparty	MUFG	MUFG
Contract date	Dec. 21, 2023	Dec. 21, 2023
Maturity date	Jan. 05, 2024	Jan. 05, 2024
Contract Amounts Pay | ₩	₩ 27,365
Contract Amounts Receive | $		$ 21,000
Contract exchange rate	1,303.1	1,303.1
Derivative Counterparty	Hana Bank	Hana Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Jan. 15, 2024	Jan. 15, 2024
Contract Amounts Pay | ₩	₩ 18,041
Contract Amounts Receive | $		$ 14,000
Contract exchange rate	1,288.65	1,288.65
Derivative Counterparty	Mizuho Bank	Mizuho Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Feb. 26, 2024	Feb. 26, 2024
Contract Amounts Pay | ₩	₩ 32,146
Contract Amounts Receive | $		$ 25,000
Contract exchange rate	1,285.85	1,285.85
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Mar. 26, 2024	Mar. 26, 2024
Contract Amounts Pay | ₩	₩ 8,984
Contract Amounts Receive | $		$ 7,000
Contract exchange rate	1,283.4	1,283.4
Derivative Counterparty	Woori Bank	Woori Bank
Contract date	Nov. 30, 2023	Nov. 30, 2023
Maturity date	Jan. 03, 2024	Jan. 03, 2024
Contract Amounts Pay | ₩	₩ 6,440
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,287.95	1,287.95
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Nov. 30, 2023	Nov. 30, 2023
Maturity date	Jan. 03, 2024	Jan. 03, 2024
Contract Amounts Pay | ₩	₩ 4,119
Contract Amounts Receive | $		$ 3,200
Contract exchange rate	1,287.15	1,287.15
Derivative Counterparty	Woori Bank	Woori Bank
Contract date	Dec. 20, 2023	Dec. 20, 2023
Maturity date	Jan. 22, 2024	Jan. 22, 2024
Contract Amounts Pay | ₩	₩ 6,487
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,297.3	1,297.3
Derivative Counterparty	Woori Bank	Woori Bank
Contract date	Dec. 27, 2023	Dec. 27, 2023
Maturity date	Jan. 29, 2024	Jan. 29, 2024
Contract Amounts Pay | ₩	₩ 6,466
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,292.2	1,292.2
Derivative Counterparty	Mizuho Bank	Mizuho Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Feb. 02, 2024	Feb. 02, 2024
Contract Amounts Pay | ₩	₩ 6,446
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,289.25	1,289.25
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Feb. 02, 2024	Feb. 02, 2024
Contract Amounts Pay | ₩	₩ 12,882
Contract Amounts Receive | $		$ 10,000
Contract exchange rate	1,288.2	1,288.2
Derivative Counterparty	HSBC	HSBC
Contract date	Oct. 19, 2020	Oct. 19, 2020
Maturity date	Oct. 29, 2024	Oct. 29, 2024
Contract Amounts Pay | ₩	₩ 140,913
Contract Amounts Receive | $		$ 125,000
Contract exchange rate	1,127.3	1,127.3
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Dec. 08, 2023	Dec. 08, 2023
Maturity date	Jan. 05, 2024	Jan. 05, 2024
Contract Amounts Pay | ₩	₩ 6,541
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,308.2	1,308.2
Derivative Counterparty	Busan Bank	Busan Bank
Contract date	Dec. 12, 2023	Dec. 12, 2023
Maturity date	Jan. 23, 2024	Jan. 23, 2024
Contract Amounts Pay | ₩	₩ 19,686
Contract Amounts Receive | $		$ 15,000
Contract exchange rate	1,312.4	1,312.4
Derivative Counterparty	Shinhan Bank	Shinhan Bank
Contract date	Dec. 14, 2023	Dec. 14, 2023
Maturity date	Jan. 23, 2024	Jan. 23, 2024
Contract Amounts Pay | ₩	₩ 10,338
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,292.19	1,292.19
Derivative Counterparty	Korea Citi Bank	Korea Citi Bank
Contract date	Dec. 15, 2023	Dec. 15, 2023
Maturity date	Jan. 15, 2024	Jan. 15, 2024
Contract Amounts Pay | ₩	₩ 6,467
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,293.45	1,293.45
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank
Contract date	Dec. 18, 2023	Dec. 18, 2023
Maturity date	Jan. 15, 2024	Jan. 15, 2024
Contract Amounts Pay | ₩	₩ 11,668
Contract Amounts Receive | $		$ 9,000
Contract exchange rate	1,296.45	1,296.45
Derivative Counterparty	Hana Bank	Hana Bank
Contract date	Dec. 27, 2023	Dec. 27, 2023
Maturity date	Jan. 26, 2024	Jan. 26, 2024
Contract Amounts Pay | ₩	₩ 6,459
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,291.89	1,291.89
Derivative Counterparty	Hana Bank	Hana Bank
Contract date	Dec. 27, 2023	Dec. 27, 2023
Maturity date	Jan. 26, 2024	Jan. 26, 2024
Contract Amounts Pay | ₩	₩ 6,457
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,291.39	1,291.39
Derivative Counterparty	JP Morgan	JP Morgan
Contract date	Nov. 02, 2023	Nov. 02, 2023
Maturity date	Jan. 26, 2024	Jan. 26, 2024
Contract Amounts Pay | ₩	₩ 8,406
Contract Amounts Receive | $		$ 6,286
Contract exchange rate	1,337.2	1,337.2
Derivative Counterparty	HSBC	HSBC
Contract date	Nov. 27, 2023	Nov. 27, 2023
Maturity date	Mar. 08, 2024	Mar. 08, 2024
Contract Amounts Pay | ₩	₩ 6,482
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,296.3	1,296.3
Derivative Counterparty	HSBC	HSBC
Contract date	Nov. 27, 2023	Nov. 27, 2023
Maturity date	Mar. 08, 2024	Mar. 08, 2024
Contract Amounts Pay | ₩	₩ 6,476
Contract Amounts Receive | $		$ 5,000
Contract exchange rate	1,295.2	1,295.2
Derivative Counterparty	Shinhan Bank	Shinhan Bank
Contract date	Dec. 08, 2023	Dec. 08, 2023
Maturity date	Mar. 08, 2024	Mar. 08, 2024
Contract Amounts Pay | ₩	₩ 13,034
Contract Amounts Receive | $		$ 10,000
Contract exchange rate	1,303.38	1,303.38
Derivative Counterparty	Shinhan Bank	Shinhan Bank
Contract date	Dec. 15, 2023	Dec. 15, 2023
Maturity date	Mar. 08, 2024	Mar. 08, 2024
Contract Amounts Pay | ₩	₩ 3,865
Contract Amounts Receive | $		$ 3,000
Contract exchange rate	1,288.22	1,288.22
Derivative Counterparty	Shinhan Bank	Shinhan Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Apr. 23, 2024	Apr. 23, 2024
Contract Amounts Pay | ₩	₩ 2,160
Contract Amounts Receive | $		$ 1,684
Contract exchange rate	1,282.4	1,282.4
Derivative Counterparty	Woori Bank	Woori Bank
Contract date	Dec. 28, 2023	Dec. 28, 2023
Maturity date	Apr. 23, 2024	Apr. 23, 2024
Contract Amounts Pay | ₩	₩ 10,253
Contract Amounts Receive | $		$ 8,000
Contract exchange rate	1,281.65	1,281.65

Derivatives - Summary of Deri_2

Derivatives - Summary of Derivative Currency Swap Contract List (Details) - 12 months ended Dec. 31, 2023 - Currency swap contracts € in Thousands, kr in Thousands, SFr in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions	KRW (₩)	USD ($)	HKD ($)	CHF (SFr)	AUD ($)	EUR (€)	SEK (kr)
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered
Derivative, Term of Contract	2014~2029	2014~2029	2014~2029	2014~2029	2014~2029	2014~2029	2014~2029
Contract Amount Pay	₩ 102,470
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.14%	3.14%	3.14%	3.14%	3.14%	3.14%	3.14%
Contract Interest rate Receive	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%
Contract exchange rate	1,024.7	1,024.7	1,024.7	1,024.7	1,024.7	1,024.7	1,024.7
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Societe Generale	Societe Generale	Societe Generale	Societe Generale	Societe Generale	Societe Generale	Societe Generale
Derivative, Term of Contract	2014~2024	2014~2024	2014~2024	2014~2024	2014~2024	2014~2024	2014~2024
Contract Amount Pay	₩ 105,017
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.92%	4.92%	4.92%	4.92%	4.92%	4.92%	4.92%
Contract Interest rate Receive	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%
Contract exchange rate	1,050.17	1,050.17	1,050.17	1,050.17	1,050.17	1,050.17	1,050.17
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2015~2024	2015~2024	2015~2024	2015~2024	2015~2024	2015~2024	2015~2024
Contract Amount Pay	₩ 107,970
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.75%	4.75%	4.75%	4.75%	4.75%	4.75%	4.75%
Contract Interest rate Receive	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%
Contract exchange rate	1,079.7	1,079.7	1,079.7	1,079.7	1,079.7	1,079.7	1,079.7
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Credit Agricole	Credit Agricole	Credit Agricole	Credit Agricole	Credit Agricole	Credit Agricole	Credit Agricole
Derivative, Term of Contract	2015~2024	2015~2024	2015~2024	2015~2024	2015~2024	2015~2024	2015~2024
Contract Amount Pay	₩ 94,219
Contract Amount Receive | $		$ 86,920
Contract Interest rate Pay	4.85%	4.85%	4.85%	4.85%	4.85%	4.85%	4.85%
Contract Interest rate Receive	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%
Contract exchange rate	1,083.97	1,083.97	1,083.97	1,083.97	1,083.97	1,083.97	1,083.97
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2019~2027	2019~2027	2019~2027	2019~2027	2019~2027	2019~2027	2019~2027
Contract Amount Pay	₩ 21,708
Contract Amount Receive | $		$ 19,417
Contract Interest rate Pay	5.04%	5.04%	5.04%	5.04%	5.04%	5.04%	5.04%
Contract Interest rate Receive	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Contract exchange rate	1,118	1,118	1,118	1,118	1,118	1,118	1,118
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay	₩ 296,000
Contract Amount Receive | $		$ 250,000
Contract Interest rate Pay	1.21%	1.21%	1.21%	1.21%	1.21%	1.21%	1.21%
Contract Interest rate Receive	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Contract exchange rate	1,184	1,184	1,184	1,184	1,184	1,184	1,184
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay	₩ 177,600
Contract Amount Receive | $		$ 150,000
Contract Interest rate Pay	1.24%	1.24%	1.24%	1.24%	1.24%	1.24%	1.24%
Contract Interest rate Receive	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Contract exchange rate	1,184	1,184	1,184	1,184	1,184	1,184	1,184
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay	₩ 118,400
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.24%	1.24%	1.24%	1.24%	1.24%	1.24%	1.24%
Contract Interest rate Receive	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Contract exchange rate	1,184	1,184	1,184	1,184	1,184	1,184	1,184
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 241,320
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.54%	0.54%	0.54%	0.54%	0.54%	0.54%	0.54%
Contract Interest rate Receive	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Contract exchange rate	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 241,320
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.54%	0.54%	0.54%	0.54%	0.54%	0.54%	0.54%
Contract Interest rate Receive	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Contract exchange rate	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 120,660
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.54%	0.54%	0.54%	0.54%	0.54%	0.54%	0.54%
Contract Interest rate Receive	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Contract exchange rate	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6	1,206.6
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026
Contract Amount Pay	₩ 76,355
Contract Amount Receive | $		$ 70,445
Contract Interest rate Pay	5.83%	5.83%	5.83%	5.83%	5.83%	5.83%	5.83%
Contract Interest rate Receive	6.00%	6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Contract exchange rate	1,083.9	1,083.9	1,083.9	1,083.9	1,083.9	1,083.9	1,083.9
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 118,170
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.11%	1.11%	1.11%	1.11%	1.11%	1.11%	1.11%
Contract Interest rate Receive	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Contract exchange rate	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 118,170
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.11%	1.11%	1.11%	1.11%	1.11%	1.11%	1.11%
Contract Interest rate Receive	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Contract exchange rate	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 118,170
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.11%	1.11%	1.11%	1.11%	1.11%	1.11%	1.11%
Contract Interest rate Receive	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Contract exchange rate	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7	1,181.7
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 385,800
Contract Amount Receive | $		$ 300,000
Contract Interest rate Pay	3.11%	3.11%	3.11%	3.11%	3.11%	3.11%	3.11%
Contract Interest rate Receive	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
Contract exchange rate	1,286	1,286	1,286	1,286	1,286	1,286	1,286
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 257,200
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	3.12%	3.12%	3.12%	3.12%	3.12%	3.12%	3.12%
Contract Interest rate Receive	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
Contract exchange rate	1,286	1,286	1,286	1,286	1,286	1,286	1,286
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 128,600
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.56%	3.56%	3.56%	3.56%	3.56%	3.56%	3.56%
Contract Interest rate Receive	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Contract exchange rate	1,286	1,286	1,286	1,286	1,286	1,286	1,286
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 128,600
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.56%	3.56%	3.56%	3.56%	3.56%	3.56%	3.56%
Contract Interest rate Receive	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Contract exchange rate	1,286	1,286	1,286	1,286	1,286	1,286	1,286
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 128,600
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.56%	3.56%	3.56%	3.56%	3.56%	3.56%	3.56%
Contract Interest rate Receive	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Contract exchange rate	1,286	1,286	1,286	1,286	1,286	1,286	1,286
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026
Contract Amount Pay	₩ 283,820
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	4.67%	4.67%	4.67%	4.67%	4.67%	4.67%	4.67%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026
Contract Amount Pay	₩ 141,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.68%	4.68%	4.68%	4.68%	4.68%	4.68%	4.68%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan
Derivative, Term of Contract	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026
Contract Amount Pay	₩ 141,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.69%	4.69%	4.69%	4.69%	4.69%	4.69%	4.69%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026	2022~2026
Contract Amount Pay	₩ 141,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.68%	4.68%	4.68%	4.68%	4.68%	4.68%	4.68%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2022~2028	2022~2028	2022~2028	2022~2028	2022~2028	2022~2028	2022~2028
Contract Amount Pay	₩ 283,820
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	5.12%	5.12%	5.12%	5.12%	5.12%	5.12%	5.12%
Contract Interest rate Receive	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2028	2022~2028	2022~2028	2022~2028	2022~2028	2022~2028	2022~2028
Contract Amount Pay	₩ 141,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%
Contract Interest rate Receive	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1	1,419.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 256,000
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	3.97%	3.97%	3.97%	3.97%	3.97%	3.97%	3.97%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 192,000
Contract Amount Receive | $		$ 150,000
Contract Interest rate Pay	3.99%	3.99%	3.99%	3.99%	3.99%	3.99%	3.99%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 128,000
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.03%	4.03%	4.03%	4.03%	4.03%	4.03%	4.03%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 256,000
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	4.04%	4.04%	4.04%	4.04%	4.04%	4.04%	4.04%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Bank of America	Bank of America	Bank of America	Bank of America	Bank of America	Bank of America	Bank of America
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 128,000
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.04%	4.04%	4.04%	4.04%	4.04%	4.04%	4.04%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered	Standard Chartered
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 128,000
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.04%	4.04%	4.04%	4.04%	4.04%	4.04%	4.04%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 192,000
Contract Amount Receive | $		$ 150,000
Contract Interest rate Pay	4.05%	4.05%	4.05%	4.05%	4.05%	4.05%	4.05%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,280	1,280	1,280	1,280	1,280	1,280	1,280
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Nomura	Nomura	Nomura	Nomura	Nomura	Nomura	Nomura
Derivative, Term of Contract	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025
Contract Amount Pay	₩ 111,190
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%
Contract Interest rate Receive	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Contract exchange rate	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025
Contract Amount Pay	₩ 111,190
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%
Contract Interest rate Receive	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Contract exchange rate	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025
Contract Amount Pay	₩ 55,595
Contract Amount Receive | $		$ 50,000
Contract Interest rate Pay	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%
Contract Interest rate Receive	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Contract exchange rate	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025	2015~2025
Contract Amount Pay	₩ 55,595
Contract Amount Receive | $		$ 50,000
Contract Interest rate Pay	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%
Contract Interest rate Receive	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Contract exchange rate	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9	1,111.9
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027
Contract Amount Pay	₩ 111,610
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.25%	2.25%	2.25%	2.25%	2.25%	2.25%	2.25%
Contract Interest rate Receive	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%
Contract exchange rate	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027
Contract Amount Pay	₩ 111,610
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.31%	2.31%	2.31%	2.31%	2.31%	2.31%	2.31%
Contract Interest rate Receive	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%
Contract exchange rate	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027	2017~2027
Contract Amount Pay	₩ 111,610
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.31%	2.31%	2.31%	2.31%	2.31%	2.31%	2.31%
Contract Interest rate Receive	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%
Contract exchange rate	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1	1,116.1
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2018~2028	2018~2028	2018~2028	2018~2028	2018~2028	2018~2028	2018~2028
Contract Amount Pay	₩ 108,600
Contract Amount Receive | $			$ 800,000
Contract Interest rate Pay	2.69%	2.69%	2.69%	2.69%	2.69%	2.69%	2.69%
Contract Interest rate Receive	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%
Contract exchange rate	135.75	135.75	135.75	135.75	135.75	135.75	135.75
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank
Derivative, Term of Contract	2018~2028	2018~2028	2018~2028	2018~2028	2018~2028	2018~2028	2018~2028
Contract Amount Pay	₩ 115,387
Contract Amount Receive | $			$ 850,000
Contract Interest rate Pay	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%
Contract Interest rate Receive	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%
Contract exchange rate	135.75	135.75	135.75	135.75	135.75	135.75	135.75
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Citi Bank	Korea Citi Bank	Korea Citi Bank	Korea Citi Bank	Korea Citi Bank	Korea Citi Bank	Korea Citi Bank
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay	₩ 239,956
Contract Amount Receive | SFr				SFr 200,000
Contract Interest rate Pay	1.44%	1.44%	1.44%	1.44%	1.44%	1.44%	1.44%
Contract Interest rate Receive	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
Contract exchange rate	1,199.78	1,199.78	1,199.78	1,199.78	1,199.78	1,199.78	1,199.78
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2019~2027	2019~2027	2019~2027	2019~2027	2019~2027	2019~2027	2019~2027
Contract Amount Pay	₩ 119,978
Contract Amount Receive | SFr				SFr 100,000
Contract Interest rate Pay	1.43%	1.43%	1.43%	1.43%	1.43%	1.43%	1.43%
Contract Interest rate Receive	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%
Contract exchange rate	1,199.78	1,199.78	1,199.78	1,199.78	1,199.78	1,199.78	1,199.78
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 222,800
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%
Contract Interest rate Receive	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%
Contract exchange rate	1,114	1,114	1,114	1,114	1,114	1,114	1,114
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 111,400
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.92	0.92	0.92	0.92	0.92	0.92	0.92
Contract Interest rate Receive	1.25	1.25	1.25	1.25	1.25	1.25	1.25
Contract exchange rate	1,114	1,114	1,114	1,114	1,114	1,114	1,114
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 111,400
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.93	0.93	0.93	0.93	0.93	0.93	0.93
Contract Interest rate Receive	1.25	1.25	1.25	1.25	1.25	1.25	1.25
Contract exchange rate	1,114	1,114	1,114	1,114	1,114	1,114	1,114
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 111,400
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.93	0.93	0.93	0.93	0.93	0.93	0.93
Contract Interest rate Receive	1.25	1.25	1.25	1.25	1.25	1.25	1.25
Contract exchange rate	1,114	1,114	1,114	1,114	1,114	1,114	1,114
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 262,000
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	3.62	3.62	3.62	3.62	3.62	3.62	3.62
Contract Interest rate Receive	4.25	4.25	4.25	4.25	4.25	4.25	4.25
Contract exchange rate	1,310	1,310	1,310	1,310	1,310	1,310	1,310
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 131,000
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.63	3.63	3.63	3.63	3.63	3.63	3.63
Contract Interest rate Receive	4.25	4.25	4.25	4.25	4.25	4.25	4.25
Contract exchange rate	1,310	1,310	1,310	1,310	1,310	1,310	1,310
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 131,000
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.62	3.62	3.62	3.62	3.62	3.62	3.62
Contract Interest rate Receive	4.25	4.25	4.25	4.25	4.25	4.25	4.25
Contract exchange rate	1,310	1,310	1,310	1,310	1,310	1,310	1,310
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 131,000
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.61	3.61	3.61	3.61	3.61	3.61	3.61
Contract Interest rate Receive	4.25	4.25	4.25	4.25	4.25	4.25	4.25
Contract exchange rate	1,310	1,310	1,310	1,310	1,310	1,310	1,310
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 262,000
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	3.63	3.63	3.63	3.63	3.63	3.63	3.63
Contract Interest rate Receive	4.25	4.25	4.25	4.25	4.25	4.25	4.25
Contract exchange rate	1,310	1,310	1,310	1,310	1,310	1,310	1,310
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea
Derivative, Term of Contract	2022~2032	2022~2032	2022~2032	2022~2032	2022~2032	2022~2032	2022~2032
Contract Amount Pay	₩ 349,829
Contract Amount Receive | $			$ 1,935,000
Contract Interest rate Pay	4.87	4.87	4.87	4.87	4.87	4.87	4.87
Contract Interest rate Receive	5.16	5.16	5.16	5.16	5.16	5.16	5.16
Contract exchange rate	180.79	180.79	180.79	180.79	180.79	180.79	180.79
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan
Derivative, Term of Contract	2022~2032	2022~2032	2022~2032	2022~2032	2022~2032	2022~2032	2022~2032
Contract Amount Pay	₩ 75,194
Contract Amount Receive | $			$ 415,000
Contract Interest rate Pay	5.00	5.00	5.00	5.00	5.00	5.00	5.00
Contract Interest rate Receive	5.16	5.16	5.16	5.16	5.16	5.16	5.16
Contract exchange rate	181.19	181.19	181.19	181.19	181.19	181.19	181.19
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea	Export-Import Bank of Korea
Derivative, Term of Contract	2023~2030	2023~2030	2023~2030	2023~2030	2023~2030	2023~2030	2023~2030
Contract Amount Pay	₩ 172,982
Contract Amount Receive | $			$ 1,037,000
Contract Interest rate Pay	4.25	4.25	4.25	4.25	4.25	4.25	4.25
Contract Interest rate Receive	4.51	4.51	4.51	4.51	4.51	4.51	4.51
Contract exchange rate	166.81	166.81	166.81	166.81	166.81	166.81	166.81
Not Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	HSBC	HSBC	HSBC	HSBC	HSBC	HSBC	HSBC
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay | $		$ 205,500
Contract Amount Receive | $					$ 300,000
Contract Interest rate Pay	3M SOFR+1.04	3M SOFR+1.04	3M SOFR+1.04	3M SOFR+1.04	3M SOFR+1.04	3M SOFR+1.04	3M SOFR+1.04
Contract Interest rate Receive	3M BBSW+0.97	3M BBSW+0.97	3M BBSW+0.97	3M BBSW+0.97	3M BBSW+0.97	3M BBSW+0.97	3M BBSW+0.97
Contract exchange rate	0.69	0.69	0.69	0.69	0.69	0.69	0.69
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 118,780
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.29%	1.29%	1.29%	1.29%	1.29%	1.29%	1.29%
Contract Interest rate Receive	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%
Contract exchange rate	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 118,780
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.29%	1.29%	1.29%	1.29%	1.29%	1.29%	1.29%
Contract Interest rate Receive	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%
Contract exchange rate	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 118,780
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.29%	1.29%	1.29%	1.29%	1.29%	1.29%	1.29%
Contract Interest rate Receive	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%
Contract exchange rate	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8	1,187.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026
Contract Amount Pay	₩ 118,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.61%	0.61%	0.61%	0.61%	0.61%	0.61%	0.61%
Contract Interest rate Receive	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Contract exchange rate	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026
Contract Amount Pay	₩ 118,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.61%	0.61%	0.61%	0.61%	0.61%	0.61%	0.61%
Contract Interest rate Receive	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Contract exchange rate	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026	2020~2026
Contract Amount Pay	₩ 118,910
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.62%	0.62%	0.62%	0.62%	0.62%	0.62%	0.62%
Contract Interest rate Receive	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Contract exchange rate	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1	1,189.1
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Nomura	Nomura	Nomura	Nomura	Nomura	Nomura	Nomura
Derivative, Term of Contract	2017~2037	2017~2037	2017~2037	2017~2037	2017~2037	2017~2037	2017~2037
Contract Amount Pay	₩ 52,457
Contract Amount Receive | €						€ 40,000
Contract Interest rate Pay	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%
Contract Interest rate Receive	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%
Contract exchange rate	1,311.42	1,311.42	1,311.42	1,311.42	1,311.42	1,311.42	1,311.42
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Nomura	Nomura	Nomura	Nomura	Nomura	Nomura	Nomura
Derivative, Term of Contract	2017~2037	2017~2037	2017~2037	2017~2037	2017~2037	2017~2037	2017~2037
Contract Amount Pay	₩ 59,423
Contract Amount Receive | kr							kr 450,000
Contract Interest rate Pay	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%	2.62%
Contract Interest rate Receive	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%
Contract exchange rate	132.05	132.05	132.05	132.05	132.05	132.05	132.05
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 114,230
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.27%	1.27%	1.27%	1.27%	1.27%	1.27%	1.27%
Contract Interest rate Receive	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%
Contract exchange rate	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 114,230
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.27%	1.27%	1.27%	1.27%	1.27%	1.27%	1.27%
Contract Interest rate Receive	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%
Contract exchange rate	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 114,230
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	1.27%	1.27%	1.27%	1.27%	1.27%	1.27%	1.27%
Contract Interest rate Receive	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%
Contract exchange rate	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3	1,142.3
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 123,710
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.41%	3.41%	3.41%	3.41%	3.41%	3.41%	3.41%
Contract Interest rate Receive	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
Contract exchange rate	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 123,710
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.41%	3.41%	3.41%	3.41%	3.41%	3.41%	3.41%
Contract Interest rate Receive	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
Contract exchange rate	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan
Derivative, Term of Contract	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027	2022~2027
Contract Amount Pay	₩ 123,710
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.41%	3.41%	3.41%	3.41%	3.41%	3.41%	3.41%
Contract Interest rate Receive	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
Contract exchange rate	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1	1,237.1
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	BNP Paribas	BNP Paribas	BNP Paribas	BNP Paribas	BNP Paribas	BNP Paribas	BNP Paribas
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay	₩ 111,841
Contract Amount Receive | SFr				SFr 100,000
Contract Interest rate Pay	1.78%	1.78%	1.78%	1.78%	1.78%	1.78%	1.78%
Contract Interest rate Receive	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%
Contract exchange rate	1,118.41	1,118.41	1,118.41	1,118.41	1,118.41	1,118.41	1,118.41
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024	2019~2024
Contract Amount Pay	₩ 111,841
Contract Amount Receive | SFr				SFr 100,000
Contract Interest rate Pay	1.78%	1.78%	1.78%	1.78%	1.78%	1.78%	1.78%
Contract Interest rate Receive	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%
Contract exchange rate	1,118.41	1,118.41	1,118.41	1,118.41	1,118.41	1,118.41	1,118.41
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 128,560
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.37%	3.37%	3.37%	3.37%	3.37%	3.37%	3.37%
Contract Interest rate Receive	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%
Contract exchange rate	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 128,560
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.37%	3.37%	3.37%	3.37%	3.37%	3.37%	3.37%
Contract Interest rate Receive	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%
Contract exchange rate	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 128,560
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.37%	3.37%	3.37%	3.37%	3.37%	3.37%	3.37%
Contract Interest rate Receive	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%
Contract exchange rate	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6	1,285.6
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 220,600
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.47%	0.47%	0.47%	0.47%	0.47%	0.47%	0.47%
Contract Interest rate Receive	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Contract exchange rate	1,103	1,103	1,103	1,103	1,103	1,103	1,103
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 220,600
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.47%	0.47%	0.47%	0.47%	0.47%	0.47%	0.47%
Contract Interest rate Receive	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Contract exchange rate	1,103	1,103	1,103	1,103	1,103	1,103	1,103
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026	2021~2026
Contract Amount Pay	₩ 55,150
Contract Amount Receive | $		$ 50,000
Contract Interest rate Pay	0.48%	0.48%	0.48%	0.48%	0.48%	0.48%	0.48%
Contract Interest rate Receive	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Contract exchange rate	1,103	1,103	1,103	1,103	1,103	1,103	1,103
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank	Shinhan Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 132,930
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.07%	4.07%	4.07%	4.07%	4.07%	4.07%	4.07%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank	Nonghyup Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 132,930
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.05%	4.05%	4.05%	4.05%	4.05%	4.05%	4.05%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank	Kookmin Bank
Derivative, Term of Contract	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026	2023~2026
Contract Amount Pay	₩ 132,930
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	4.07%	4.07%	4.07%	4.07%	4.07%	4.07%	4.07%
Contract Interest rate Receive	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Contract exchange rate	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3	1,329.3
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 245,560
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%
Contract Interest rate Receive	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%
Contract exchange rate	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 245,560
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%
Contract Interest rate Receive	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%
Contract exchange rate	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025	2020~2025
Contract Amount Pay	₩ 122,780
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%
Contract Interest rate Receive	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%
Contract exchange rate	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8	1,227.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan	JP Morgan
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 126,180
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%
Contract Interest rate Receive	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%
Contract exchange rate	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank	Hana Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 126,180
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%
Contract Interest rate Receive	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%
Contract exchange rate	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 252,360
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	2.83%	2.83%	2.83%	2.83%	2.83%	2.83%	2.83%
Contract Interest rate Receive	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%
Contract exchange rate	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025	2022~2025
Contract Amount Pay	₩ 126,180
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	2.85%	2.85%	2.85%	2.85%	2.85%	2.85%	2.85%
Contract Interest rate Receive	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%
Contract exchange rate	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8	1,261.8
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank	Woori Bank
Derivative, Term of Contract	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028
Contract Amount Pay	₩ 259,000
Contract Amount Receive | $		$ 200,000
Contract Interest rate Pay	3.83%	3.83%	3.83%	3.83%	3.83%	3.83%	3.83%
Contract Interest rate Receive	4.88%	4.88%	4.88%	4.88%	4.88%	4.88%	4.88%
Contract exchange rate	1,295	1,295	1,295	1,295	1,295	1,295	1,295
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank	Korea Development Bank
Derivative, Term of Contract	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028
Contract Amount Pay	₩ 129,500
Contract Amount Receive | $		$ 100,000
Contract Interest rate Pay	3.85%	3.85%	3.85%	3.85%	3.85%	3.85%	3.85%
Contract Interest rate Receive	4.88%	4.88%	4.88%	4.88%	4.88%	4.88%	4.88%
Contract exchange rate	1,295	1,295	1,295	1,295	1,295	1,295	1,295
Designated as Hedging Instrument
Disclosure of Derivative Currency swap contract detail list [Line Items]
Derivative Counterparty	Bank of America	Bank of America	Bank of America	Bank of America	Bank of America	Bank of America	Bank of America
Derivative, Term of Contract	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028	2023~2028
Contract Amount Pay	₩ 64,750
Contract Amount Receive | $		$ 50,000
Contract Interest rate Pay	3.85%	3.85%	3.85%	3.85%	3.85%	3.85%	3.85%
Contract Interest rate Receive	4.88%	4.88%	4.88%	4.88%	4.88%	4.88%	4.88%
Contract exchange rate	1,295	1,295	1,295	1,295	1,295	1,295	1,295

Derivatives - Summary of Deri_3

Derivatives - Summary of Derivative Interest Rate Swap Contract List (Details) - 12 months ended Dec. 31, 2023 $ in Thousands, $ in Thousands, ₩ in Millions		KRW (₩)	AUD ($)	USD ($)
Designated as Hedging Instrument | Interest rate swap 1 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Export-Import Bank of Korea
Derivative, Term of Contract		2015~2031
Contract Interest rate Pay		2.67
Contract Interest rate Receive		6M USD Libor
Contract amount | $				$ 15,893
Designated as Hedging Instrument | Interest rate swap 2 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		ING Bank
Derivative, Term of Contract		2015~2031
Contract Interest rate Pay		2.67
Contract Interest rate Receive		6M USD Libor
Contract amount | $				7,861
Designated as Hedging Instrument | Interest rate swap 3 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		BNP Paribas
Derivative, Term of Contract		2015~2031
Contract Interest rate Pay		2.67
Contract Interest rate Receive		6M USD Libor
Contract amount | $				7,861
Designated as Hedging Instrument | Interest rate swap 4 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		BNP Paribas
Derivative, Term of Contract		2009~2027
Contract Interest rate Pay		4.16
Contract Interest rate Receive		6M USD Libor
Contract amount | $				41,040
Designated as Hedging Instrument | Interest rate swap 5 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		KFW
Derivative, Term of Contract		2009~2027
Contract Interest rate Pay		4.16
Contract Interest rate Receive		6M USD Libor
Contract amount | $				41,040
Designated as Hedging Instrument | Interest rate swap 6 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Export-Import Bank of Korea
Derivative, Term of Contract		2016~2036
Contract Interest rate Pay		3.00
Contract Interest rate Receive		6M USD Libor
Contract amount | $				60,977
Not Designated as Hedging Instrument | Interest rate swap 1 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty	[1]	Nomura
Derivative, Term of Contract	[1]	2018~2038
Contract Interest rate Pay	[1]	3M CD+0.10
Contract Interest rate Receive	[1]	3.75
Contract amount	[1]	₩ 30,000
Not Designated as Hedging Instrument | Interest rate swap 2 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2019~2024
Contract Interest rate Pay		1.87
Contract Interest rate Receive		3M CD+0.13
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 3 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Shinhan Bank
Derivative, Term of Contract		2021~2025
Contract Interest rate Pay		2.32
Contract Interest rate Receive		3M CD+0.43
Contract amount		₩ 100,000
Not Designated as Hedging Instrument | Interest rate swap 4 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.02
Contract Interest rate Receive		3M CD+0.61
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 5 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.04
Contract Interest rate Receive		3M CD+0.58
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 6 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.38
Contract Interest rate Receive		3M CD+0.59
Contract amount		₩ 250,000
Not Designated as Hedging Instrument | Interest rate swap 7 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.55
Contract Interest rate Receive		3M CD+0.60
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 8 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Shinhan Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.53
Contract Interest rate Receive		3M CD+0.55
Contract amount		₩ 150,000
Not Designated as Hedging Instrument | Interest rate swap 9 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.70
Contract Interest rate Receive		3M CD+0.59
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 10 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.89
Contract Interest rate Receive		3M CD+0.67
Contract amount		₩ 300,000
Not Designated as Hedging Instrument | Interest rate swap 11 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.93
Contract Interest rate Receive		3M CD+0.67
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 12 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		3.80
Contract Interest rate Receive		3M CD+0.68
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 13 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		4.04
Contract Interest rate Receive		3M CD+0.60
Contract amount		₩ 300,000
Not Designated as Hedging Instrument | Interest rate swap 14 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		4.68
Contract Interest rate Receive		3M CD+1.04
Contract amount		₩ 100,000
Not Designated as Hedging Instrument | Interest rate swap 15 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2022~2027
Contract Interest rate Pay		5.45
Contract Interest rate Receive		3M CD+1.20
Contract amount		₩ 100,000
Not Designated as Hedging Instrument | Interest rate swap 16 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Shinhan Bank
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		4.27
Contract Interest rate Receive		3M CD+0.76
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 17 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Shinhan Bank
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		4.27
Contract Interest rate Receive		3M CD+0.76
Contract amount		₩ 50,000
Not Designated as Hedging Instrument | Interest rate swap 18 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		4.13
Contract Interest rate Receive		3M CD+0.73
Contract amount		₩ 250,000
Not Designated as Hedging Instrument | Interest rate swap 19 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		3.74
Contract Interest rate Receive		3M CD+0.51
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 20 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		4.19
Contract Interest rate Receive		3M CD+0.50
Contract amount		₩ 100,000
Not Designated as Hedging Instrument | Interest rate swap 21 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Shinhan Bank
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		3.81
Contract Interest rate Receive		3M CD+0.70
Contract amount		₩ 300,000
Not Designated as Hedging Instrument | Interest rate swap 22 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Hana Bank
Derivative, Term of Contract		2023~2028
Contract Interest rate Pay		3.95
Contract Interest rate Receive		3M CD+0.50
Contract amount		₩ 200,000
Not Designated as Hedging Instrument | Interest rate swap 23 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2017~2032
Contract Interest rate Pay		2.55%+Floating rate
Contract Interest rate Receive		2.60
Contract amount		₩ 52,457
Not Designated as Hedging Instrument | Interest rate swap 24 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Nomura
Derivative, Term of Contract		2017~2032
Contract Interest rate Pay		2.57%+Floating rate
Contract Interest rate Receive		2.62
Contract amount		₩ 59,423
Not Designated as Hedging Instrument | Interest rate swap 25 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty	[2]	Nomura
Derivative, Term of Contract	[2]	2021~2041
Contract Interest rate Pay	[2]	1.84
Contract Interest rate Receive	[2]	2.60
Contract amount	[2]	₩ 30,000
Not Designated as Hedging Instrument | Interest rate swap 26 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty	[3]	Nomura
Derivative, Term of Contract	[3]	2021~2041
Contract Interest rate Pay	[3]	1.87
Contract Interest rate Receive	[3]	2.38
Contract amount	[3]	₩ 50,000
Not Designated as Hedging Instrument | Interest rate swap 27 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		ANZ
Derivative, Term of Contract		2022~2025
Contract Interest rate Pay		0.48
Contract Interest rate Receive		3.33
Contract amount | $			$ 865
Not Designated as Hedging Instrument | Interest rate swap 28 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		DBS Bank
Derivative, Term of Contract		2022~2025
Contract Interest rate Pay		0.48
Contract Interest rate Receive		3.33
Contract amount | $			865
Not Designated as Hedging Instrument | Interest rate swap 29 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Societe Generale
Derivative, Term of Contract		2022~2025
Contract Interest rate Pay		0.48
Contract Interest rate Receive		3.28
Contract amount | $			$ 865
Not Designated as Hedging Instrument | Interest rate swap 30 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		MUFG
Derivative, Term of Contract		2022~2048
Contract Interest rate Pay		SOFR(3M)
Contract Interest rate Receive		3.71
Contract amount | $				155,941
Not Designated as Hedging Instrument | Interest rate swap 31 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Mizuho Bank
Derivative, Term of Contract		2022~2048
Contract Interest rate Pay		SOFR(3M)
Contract Interest rate Receive		1.05
Contract amount | $				155,941
Not Designated as Hedging Instrument | Interest rate swap 32 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Mizuho Bank
Derivative, Term of Contract		2022~2024
Contract Interest rate Pay		SOFR(1M)
Contract Interest rate Receive		1.80
Contract amount | $				112,194
Not Designated as Hedging Instrument | Interest rate swap 33 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Rabobank
Derivative, Term of Contract		2022~2036
Contract Interest rate Pay		1.83
Contract Interest rate Receive		SOFR(6M)
Contract amount | $				37,130
Not Designated as Hedging Instrument | Interest rate swap 34 contracts
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Counterparty		Mizuho Capital Markets LLC
Derivative, Term of Contract		2021~2045
Contract Interest rate Pay		5.38
Contract Interest rate Receive		1.14
Contract amount | $				$ 82,886
[1]Depending on the counterparty exercising the right, the contract may be early settled on the same date every year from June 15, 2023.[2]1.84% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+0.35% is applied thereafter.[3]1.87% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+0.35% is applied thereafter.

Derivatives - Summary of Deri_4

Derivatives - Summary of Derivative Interest Rate Swap Contract List (Parenthetical) (Details) - Not Designated as Hedging Instrument	12 Months Ended
	Dec. 31, 2023
Interest rate swap contracts 25 [Member]
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Contract Interest rate Pay	1.84	[1]
Interest rate swap contracts 25 [Member] | First Five Years [Member]
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Contract Interest rate Pay	1.84
Interest rate swap contracts 25 [Member] | Thereafter [Member]
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Contract Interest rate Pay	3M CMT+0.35
Interest Rate Swap Contracts 26 [Member]
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Contract Interest rate Pay	1.87	[2]
Interest Rate Swap Contracts 26 [Member] | First Five Years [Member]
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Contract Interest rate Pay	1.87
Interest Rate Swap Contracts 26 [Member] | Thereafter [Member]
Disclosure of Derivative Interest rate swap contract detail list [Line Items]
Contract Interest rate Pay	3M CMT+0.35
[1]1.84% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+0.35% is applied thereafter.[2]1.87% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT+0.35% is applied thereafter.

Other Financial Assets - Summar

Other Financial Assets - Summary of Other Financial Assets (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Financial Assets [Line Items]
Current Other financial assets	₩ 3,107,397	₩ 4,286,975
Non-Current Other financial assets	3,546,214	3,336,835
Loans and receivables
Other Financial Assets [Line Items]
Current Other financial assets	138,161	132,061
Non-Current Other financial assets	850,170	881,310
Loans and receivables | Gross amount
Other Financial Assets [Line Items]
Current Other financial assets	139,178	132,890
Non-Current Other financial assets	966,421	968,468
Loans and receivables | Allowance for doubtful accounts
Other Financial Assets [Line Items]
Current Other financial assets	(10)	(13)
Non-Current Other financial assets	(80,783)	(54,824)
Loans and receivables | Present value discount
Other Financial Assets [Line Items]
Current Other financial assets	(1,007)	(816)
Non-Current Other financial assets	(35,468)	(32,334)
Short-term financial instruments
Other Financial Assets [Line Items]
Current Other financial assets	578,578	666,758
Long-term financial instruments
Other Financial Assets [Line Items]
Non-Current Other financial assets	833,737	686,322
Other financial assets
Other Financial Assets [Line Items]
Current Other financial assets	716,739	798,819
Non-Current Other financial assets	₩ 1,683,907	₩ 1,567,632

Other Financial Assets - Summ_2

Other Financial Assets - Summary of Loans and Receivables (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Loans And Leases Receivable Disclosure [Line Items]
Short-term loans and receivables Face value	₩ 139,178	₩ 132,890
Short-term loans and receivables Allowance for doubtful accounts	(10)	(13)
Short-term loans and receivables Present value discount	(1,007)	(816)
Short-term loans and receivables	138,161	132,061
Long-term loans and receivables Face value	966,421	968,468
Long-term loans and receivables Allowance for doubtful accounts	(80,783)	(54,824)
Long-term loans and receivables Present value discount	(35,468)	(32,334)
Long-term loans and receivables	850,170	881,310
Loans and receivables Face value	1,105,599	1,101,358
Loans and receivables Allowance for doubtful accounts	(80,793)	(54,837)
Loans and receivables Present value discount	(36,475)	(33,150)
Loans and receivables	988,331	1,013,371
Loans for tuition
Loans And Leases Receivable Disclosure [Line Items]
Short-term loans and receivables Face value	30,497	30,261
Short-term loans and receivables Allowance for doubtful accounts	0	0
Short-term loans and receivables Present value discount	(1,007)	(816)
Short-term loans and receivables	29,490	29,445
Long-term loans and receivables Face value	419,684	436,131
Long-term loans and receivables Allowance for doubtful accounts	(24,745)	(37,783)
Long-term loans and receivables Present value discount	(35,468)	(32,334)
Long-term loans and receivables	359,471	366,014
Loans for housing
Loans And Leases Receivable Disclosure [Line Items]
Short-term loans and receivables Face value	35,560	29,630
Short-term loans and receivables Allowance for doubtful accounts	0	0
Short-term loans and receivables Present value discount	0	0
Short-term loans and receivables	35,560	29,630
Long-term loans and receivables Face value	301,840	309,446
Long-term loans and receivables Allowance for doubtful accounts	0	0
Long-term loans and receivables Present value discount	0	0
Long-term loans and receivables	301,840	309,446
Loans for related parties
Loans And Leases Receivable Disclosure [Line Items]
Long-term loans and receivables Face value	222,014	187,728
Long-term loans and receivables Allowance for doubtful accounts	(43,640)	(17,041)
Long-term loans and receivables Present value discount	0	0
Long-term loans and receivables	178,374	170,687
Other loans
Loans And Leases Receivable Disclosure [Line Items]
Short-term loans and receivables Face value	73,121	72,999
Short-term loans and receivables Allowance for doubtful accounts	(10)	(13)
Short-term loans and receivables Present value discount	0	0
Short-term loans and receivables	73,111	72,986
Long-term loans and receivables Face value	22,883	35,163
Long-term loans and receivables Allowance for doubtful accounts	(12,398)	0
Long-term loans and receivables Present value discount	0	0
Long-term loans and receivables	₩ 10,485	₩ 35,163

Other Financial Assets - Summ_3

Other Financial Assets - Summary of Changes in the Allowance for Doubtful Accounts of Loans and Receivables (Details) - Corporate loans - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for doubtful accounts [Line Items]
Beginning balance	₩ 54,837	₩ 52,677	₩ 20,267
Bad debt expense	16,394	2,180	30,942
Other	9,562	(20)	1,468
Ending balance	₩ 80,793	₩ 54,837	₩ 52,677

Other Financial Assets - Summ_4

Other Financial Assets - Summary of Long-Term and Short-Term Financial Instruments (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Long / short-term financial instruments [Line Items]
Current financial assets	₩ 19,436,019	₩ 17,983,577
Non-current financial assets	5,739,801	5,489,915
Other financial assets
Long / short-term financial instruments [Line Items]
Current financial assets	578,578	666,758
Non-current financial assets	833,737	686,322
Other financial assets | Time deposits
Long / short-term financial instruments [Line Items]
Current financial assets	363,286	428,813
Non-current financial assets	145,336	130,570
Other financial assets | CD
Long / short-term financial instruments [Line Items]
Current financial assets	0	30,000
Non-current financial assets	0	0
Other financial assets | Others
Long / short-term financial instruments [Line Items]
Current financial assets	215,292	207,945
Non-current financial assets	₩ 688,401	₩ 555,752

Inventories - Summary of Invent

Inventories - Summary of Inventories (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Inventories [Line Items]
Raw materials	₩ 4,623,251	₩ 4,520,821
Merchandise	335	1,001
Work-in-progress	187,304	172,014
Finished goods	97,215	52,585
Supplies	2,930,978	2,814,377
Inventories-in-transit	1,021,797	2,356,444
Other inventories	14,735	13,490
Total Inventories	8,875,615	9,930,732
Acquisition cost
Inventories [Line Items]
Raw materials	4,624,638	4,522,171
Merchandise	335	1,001
Work-in-progress	187,304	172,089
Finished goods	97,272	52,642
Supplies	2,930,978	2,814,377
Inventories-in-transit	1,021,797	2,356,444
Other inventories	14,735	13,490
Total Inventories	8,877,059	9,932,214
Valuation allowance
Inventories [Line Items]
Raw materials	(1,387)	(1,350)
Merchandise	0	0
Work-in-progress	0	(75)
Finished goods	(57)	(57)
Supplies	0	0
Inventories-in-transit	0	0
Other inventories	0	0
Total Inventories	₩ (1,444)	₩ (1,482)

Inventories - Additional inform

Inventories - Additional information (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Inventories [Line Items]
Reversal of write down of inventory	₩ 9,974	₩ 18,162	₩ 11,422
Write down of inventory	9,936	14,528	7,761
Other Gains Losses [Member]
Inventories [Line Items]
Write down of inventory	₩ 9,936	₩ 14,528	₩ 7,761

Non-Financial Assets - Summary

Non-Financial Assets - Summary of Non-Financial Assets (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current non-financial assets [Abstract]
Advance payments	₩ 300,350	₩ 160,596
Prepaid expenses	440,079	366,532
Greenhouse gas emissions rights	25,246	192,005
Other quick assets	343,646	1,025,736
Others	368,892	1,217,741
Current non-financial assets	1,109,321	1,744,869
Non-current non-financial assets [Abstract]
Advance payments	75,489	51,425
Prepaid expenses	214,022	153,830
Greenhouse gas emissions rights	0	0
Other quick assets	60,659	103,879
Others	60,659	103,879
Non-current non-financial assets	₩ 350,170	₩ 309,134

Consolidated Subsidiaries - Sum

Consolidated Subsidiaries - Summary of Consolidated Subsidiaries (Details)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Korea Hydro & Nuclear Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Korea South-East Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Korea Midland Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Korea Western Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Korea Southern Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Korea East-West Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KEPCO Engineering & Construction Company, Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Engineering and construction for utility plant and others	Engineering and construction for utility plant and others
Location		Korea	Korea
Proportion of ownership (%)		51%	65.77%
KEPCO Plant Service & Engineering Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Korea	Korea
Proportion of ownership (%)		51%	51%
KEPCO Nuclear Fuel Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Nuclear fuel	Nuclear fuel
Location		Korea	Korea
Proportion of ownership (%)		96.36%	96.36%
KEPCO KDN Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Electric power information technology and others	Electric power information technology and others
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KEPCO International HongKong Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Hong Kong	Hong Kong
Proportion of ownership (%)		100%	100%
KEPCO International Philippines Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Philippines	Philippines
Proportion of ownership (%)		100%	100%
KEPCO Gansu International Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Hong Kong	Hong Kong
Proportion of ownership (%)		100%	100%
KEPCO Philippines Holdings Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Philippines	Philippines
Proportion of ownership (%)		100%	100%
KEPCO Philippines Corporation
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Philippines	Philippines
Proportion of ownership (%)		100%	100%
KEPCO Ilijan Corporation
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Construction and operation of utility plant	Construction and operation of utility plant
Location		Philippines	Philippines
Proportion of ownership (%)		51%	51%
KEPCO Lebanon SARL
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Lebanon	Lebanon
Proportion of ownership (%)		0%	100%
Reason		Under liquidation process
KEPCO Neimenggu International Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Hong Kong	Hong Kong
Proportion of ownership (%)		100%	100%
KEPCO Shanxi International Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Hong Kong	Hong Kong
Proportion of ownership (%)		100%	100%
KOMIPO Global Pte Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Singapore	Singapore
Proportion of ownership (%)		100%	100%
KEPCO Netherlands B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
KEPCO Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOSEP Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOMIPO Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOWEPO Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOSPO Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KEPCO Middle East Holding Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Bahrain	Bahrain
Proportion of ownership (%)		100%	100%
Qatrana Electric Power Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Construction and operation of utility plant	Construction and operation of utility plant
Location		Jordan	Jordan
Proportion of ownership (%)		80%	80%
KHNP Canada Energy Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Canada	Canada
Proportion of ownership (%)		100%	100%
KEPCO Bylong Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
Korea Waterbury Uranium Limited Partnership
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Canada	Canada
Proportion of ownership (%)		80.03%	80%
KEPCO Holdings de Mexico
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Mexico	Mexico
Proportion of ownership (%)		100%	100%
KST Electric Power Company, S.A.P.I. de C.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Construction and operation of utility plant	Construction and operation of utility plant
Location		Mexico	Mexico
Proportion of ownership (%)		56%	56%
KEPCO Energy Service Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Mexico	Mexico
Proportion of ownership (%)		100%	100%
KEPCO Netherlands S3 B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
PT. KOMIPO Pembangkitan Jawa Bali
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Indonesia	Indonesia
Proportion of ownership (%)		51%	51%
PT. Cirebon Power Service
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Indonesia	Indonesia
Proportion of ownership (%)		27.50%	27.50%
KOWEPO International Corporation
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Philippines	Philippines
Proportion of ownership (%)		99.99%	99.99%
KOSPO Jordan LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Jordan	Jordan
Proportion of ownership (%)		100%	100%
EWP America Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
EWP Renewable Corporation
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
KNF Canada Energy Limited
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Canada	Canada
Proportion of ownership (%)		100%	100%
EWP Barbados 1 SRL
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Barbados	Barbados
Proportion of ownership (%)		100%	100%
California Power Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		USA	USA
Proportion of ownership (%)		100%	100%
Gyeonggi Green Energy Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		62.01%	62.01%
PT. Tanggamus Electric Power
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Indonesia	Indonesia
Proportion of ownership (%)		52.50%	52.50%
Gyeongju Wind Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		70%	70%
KOMIPO America Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
PT. EWP Indonesia
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Indonesia	Indonesia
Proportion of ownership (%)		99.96%	99.96%
KEPCO Netherlands J3 B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
Korea Offshore Wind Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Global One Pioneer B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
Global Energy Pioneer B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
Mira Power Limited
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Pakistan	Pakistan
Proportion of ownership (%)		76%	76%
KOSEP Material Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Recycling fly ashes	Recycling fly ashes
Location		Korea	Korea
Proportion of ownership (%)		86.22%	86.22%
Commerce and Industry Energy Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		RDF power generation	RDF power generation
Location		Korea	Korea
Proportion of ownership (%)		85.03%	85.03%
KEPCO KPS Philippines Corp.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Philippines	Philippines
Proportion of ownership (%)		99.99%	99.99%
KOSPO Chile SpA
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Chile	Chile
Proportion of ownership (%)		100%	100%
PT. KOWEPO Sumsel Operation and Maintenance Services
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Indonesia	Indonesia
Proportion of ownership (%)		95%	95%
Hee Mang Sunlight Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Fujeij Wind Power Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Jordan	Jordan
Proportion of ownership (%)		100%	100%
KOSPO Youngnam Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Operation of utility plant	Operation of utility plant
Location		Korea	Korea
Proportion of ownership (%)		100%	50%
Chitose Solar Power Plant LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Japan	Japan
Proportion of ownership (%)		65%	65%
KEPCO Energy Solution Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Energy service	Energy service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KEPCO Solar Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KOSPO Power Services Ltda.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Chile	Chile
Proportion of ownership (%)		65%	65%
Energy New Industry Specialized Investment Private Investment Trust
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		99.01%	99.01%
KOEN Bylong Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOMIPO Bylong Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOWEPO Bylong Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOSPO Bylong Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
EWP Bylong Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Resources development	Resources development
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
KOWEPO Lao International
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Laos	Laos
Proportion of ownership (%)		100%	100%
KEPCO US Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		0%	100%
Reason		Liquidation
KEPCO Mangilao Holdings LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Mangilao Investment LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		80.06%	80.06%
KEPCO Mangilao Solar, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		USA	USA
Proportion of ownership (%)		100%	100%
Jeju Hanlim Offshore Wind Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		79.03%	79.03%
PT. Siborpa Eco Power
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Construction and operation of utility plant	Construction and operation of utility plant
Location		Indonesia	Indonesia
Proportion of ownership (%)		55%	55%
BSK E-New Industry Fund VII
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		81.67%	81.67%
e-New Industry LB Fund 1
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		76.11%	76.11%
Songhyun e-New Industry Fund
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		80.65%	80.65%
BSK E-New Industry Fund X
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		66.80%	66.80%
PT. Korea Energy Indonesia
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Indonesia	Indonesia
Proportion of ownership (%)		95%	95%
KOLAT SpA
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Chile	Chile
Proportion of ownership (%)		100%	100%
KEPCO California, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
KEPCO Mojave Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Incheon Fuel Cell Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		60%	60%
KOEN Service Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KOMIPO Service Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KOWEPO Service Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KOSPO Service Co., Ltd
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
EWP Service Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
PT. KOMIPO Energy Indonesia
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Indonesia	Indonesia
Proportion of ownership (%)		95%	95%
KNF Partners Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KOSPO USA Inc.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Nambu USA LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Tamra Offshore Wind Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		63%	63%
KEPCO MCS Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Electric meter reading and others	Electric meter reading and others
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KEPCO FMS Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Security service and others	Security service and others
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Firstkeepers Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Secutec Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Security service	Security service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
SE Green Energy Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		84.80%	84.80%
Mangilao Intermediate Holdings LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
KEPCO CSC Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KOAK Power Limited
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Hydro power facility maintenance	Hydro power facility maintenance
Location		Pakistan	Pakistan
Proportion of ownership (%)		100%	100%
KOMIPO Europe B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
Haenanum Energy Fund
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		99.64%	99.64%
Paju Ecoenergy Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		89%	89%
Guam Ukudu Power LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		USA	USA
Proportion of ownership (%)		100%	100%
K-SOLAR SHINAN Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		90%	90%
KPS Partners Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
KEPCO E&C Service Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Facility maintenance and service	Facility maintenance and service
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Moha Solar Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Ogiri Solar Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		70%	70%
KHNP USA LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
KOMIPO Vanphong Power Service LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Vietnam	Vietnam
Proportion of ownership (%)		100%	100%
Energy Innovation Fund I
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		71.91%	71.91%
KHNP Chile SpA
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Chile	Chile
Proportion of ownership (%)		100%	100%
Yeong Yang Apollon Photovoltaic Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Yeong Yang Corporation Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
SolarVader Co., Ltd
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Yeong Yang Innovation Co., Ltd
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Yeong Yang Horus Photovoltaic Co., Ltd
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
Yeong Yang Solar Management Co., Ltd
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
LSG Hydro Power Limited
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Pakistan	Pakistan
Proportion of ownership (%)		99.80%	99.80%
KOEN Bio Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Wood pellet utilization business	Wood pellet utilization business
Location		Korea	Korea
Proportion of ownership (%)		70%	70%
KOMIPO Energy Solution America, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Elara Investment Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		0.10%	0.10%
Elara Equity Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		54%	54%
Elara Class B Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Elara Class B Member, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Elara Development Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
KOMIPO Development, LLC (formerly, Elara Development, LLC)
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Elara Energy Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		43.94%	43.94%
Elara Energy Project, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		USA	USA
Proportion of ownership (%)		100%	100%
KOMIPO Iberian Solar Group, S.L.U.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Spain	Spain
Proportion of ownership (%)		100%	100%
Jeongam Wind Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		80%	80%
KOWEPO Europe B.V.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Netherlands	Netherlands
Proportion of ownership (%)		100%	100%
CVS Equity Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		81.34%	81.34%
CVS Class B Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
CVS Development Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
CVS Development, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
CVS Class B Member, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
CVS Energy Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		70.79%	70.79%
Concho Valley Energy, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Concho Valley Solar, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		USA	USA
Proportion of ownership (%)		100%	100%
Yeongdeok Sunrise Wind Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		70%	70%
KHNP Spain, S.L.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Spain	Spain
Proportion of ownership (%)		0%	100%
Reason		Liquidation
UI Carbon-Neutrality Fund
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		78.97%	78.97%
KA Power Limited
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Pakistan	Pakistan
Proportion of ownership (%)		100%	100%
Western Power Changgi Solar Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		100%	100%
EWP Australia Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Australia	Australia
Proportion of ownership (%)		100%	100%
Columboola Solar Farm Hold Co Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Australia	Australia
Proportion of ownership (%)		74.04%	74.04%
Digital Innovation Growth Fund
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		76.92%	76.92%
J Wind First, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Company specializing in liquidization	Company specializing in liquidization
Location		Korea	Korea
Proportion of ownership (%)		0%	0%
KEPCO Holding Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Saudi Arabia	Saudi Arabia
Proportion of ownership (%)		100%	100%
KEPCO for Power Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Saudi Arabia	Saudi Arabia
Proportion of ownership (%)		0%	60%
Reason		Change in the scope of consolidation
KEPCO for Maintenance Company
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		Saudi Arabia	Saudi Arabia
Proportion of ownership (%)		100%	100%
KOSPO Trumbull LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	100%
Changjuk Wind Power Co., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Korea	Korea
Proportion of ownership (%)		73%	73%
Chile Solar JV SpA
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Power generation	Power generation
Location		Chile	Chile
Proportion of ownership (%)		100%	0%
Reason		Change in the scope of consolidation
KEPCO KPS South Africa Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Utility plant maintenance and others	Utility plant maintenance and others
Location		South Africa	South Africa
Proportion of ownership (%)		100%	0%
Reason		New investment
KOWEPO Holding Limited
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		United Arab Emirates	United Arab Emirates
Proportion of ownership (%)		100%	0%
Reason		New investment
Magna Energy New Industrial Fund
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		Korea	Korea
Proportion of ownership (%)		82%	0%
Reason		New investment
Columboola Solar Farm Nominees Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities	[1]	Power generation	Power generation
Location	[1]	Australia	Australia
Proportion of ownership (%)	[1]	100%	0%
Reason		New investment
Columboola Solar Farm Op Trust
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities	[1]	Power generation	Power generation
Location	[1]	Australia	Australia
Proportion of ownership (%)	[1]	100%	0%
Reason		New investment
Columboola Solar Farm Fin Co Pty., Ltd.
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities	[1]	Holding company	Holding company
Location	[1]	Australia	Australia
Proportion of ownership (%)	[1]	100%	0%
Reason		New investment
EWP ESS Holdings, LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	0%
Reason		New investment
Fairhaven ESS LLC
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items]
Key operation activities		Holding company	Holding company
Location		USA	USA
Proportion of ownership (%)		100%	0%
Reason		New investment
[1]As of December 31, 2023, the annual reporting period of all subsidiaries ends on December 31, except for Mira Power Limited, Columboola Solar Farm Hold Co Pty., Ltd., Columboola Solar Farm Nominees Pty., Ltd., Columboola Solar Farm Op Trust and Columboola Solar Farm Fin Co Pty., Ltd.

Consolidated Subsidiaries - S_2

Consolidated Subsidiaries - Summary of Consolidated Subsidiaries (Parentheticals) (Details)	12 Months Ended
	Dec. 31, 2023
Disclosure of subsidiaries [line items]
Percentage of voting equity interests acquired	100%
KEPCO Engineering & Construction Company, Inc.
Disclosure of subsidiaries [line items]
Sale of shares held percentage	14.77%
Percentage of Effective Percentage Ownership Holding In Subsidiary	51.24%
PT. Cirebon Power Service
Disclosure of subsidiaries [line items]
Description of significant judgements and assumptions made in determining that entity controls another entity even though it holds less than half of voting rights	The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company obtained the majority of the voting power under the shareholders’ agreement.
Elara Investment Holdings, LLC
Disclosure of subsidiaries [line items]
Description of significant judgements and assumptions made in determining that entity controls another entity even though it holds less than half of voting rights	The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company has control over the board of directors under the shareholders' agreement.
J Wind First, LLC
Disclosure of subsidiaries [line items]
Description of significant judgements and assumptions made in determining that entity controls another entity even though it holds less than half of voting rights	Although the Company does not hold a stake as of December 31, 2023, considering the purpose and design of the structured entity, the Company is exposed to volatility in the profits of the structured entity. In addition, Company has the ability to direct activities that can most significantly affect the operations of the structured entity, so it has been determined that the Company has control over the entity.
Elara Energy Holdings, LLC
Disclosure of subsidiaries [line items]
Description of significant judgements and assumptions made in determining that entity controls another entity even though it holds less than half of voting rights	The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company has control over the board of directors under the shareholders' agreement.

Consolidated Subsidiaries - S_3

Consolidated Subsidiaries - Summary of Financial Information of Consolidated Subsidiaries (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	₩ 239,714,965	₩ 234,804,994
Total liabilities	202,450,215	192,804,738
Sales	87,476,410	70,546,024	₩ 60,012,375
Profit (loss) for the period	(4,716,144)	(24,429,108)	₩ (5,215,581)
Korea Hydro & Nuclear Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	70,535,018	69,129,625
Total liabilities	45,660,916	42,843,974
Sales	10,798,378	10,386,091
Profit (loss) for the period	151,638	(16,382)
Korea South-East Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	13,158,245	13,855,071
Total liabilities	6,964,695	7,410,881
Sales	7,761,713	8,972,991
Profit (loss) for the period	196,522	71,662
Korea Midland Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	15,309,205	16,062,605
Total liabilities	10,368,698	10,776,943
Sales	7,611,821	8,629,165
Profit (loss) for the period	(1,844)	(58,173)
Korea Western Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	12,710,246	13,459,054
Total liabilities	7,648,441	8,125,312
Sales	6,915,233	8,112,727
Profit (loss) for the period	126,519	106,361
Korea Southern Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	13,405,076	14,011,354
Total liabilities	7,807,334	8,296,983
Sales	7,298,989	9,304,362
Profit (loss) for the period	226,811	(68,315)
Korea East-West Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	11,683,112	12,079,954
Total liabilities	5,626,034	5,818,789
Sales	5,571,885	6,925,094
Profit (loss) for the period	139,013	2,888
KEPCO Engineering & Construction Company, Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	854,704	815,533
Total liabilities	307,396	272,119
Sales	545,092	505,291
Profit (loss) for the period	32,654	17,954
KEPCO Plant Service & Engineering Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,585,380	1,555,453
Total liabilities	318,597	344,702
Sales	1,523,031	1,425,913
Profit (loss) for the period	161,849	97,881
KEPCO Nuclear Fuel Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,101,960	949,455
Total liabilities	622,157	490,215
Sales	284,066	304,405
Profit (loss) for the period	43,533	31,508
KEPCO KDN Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	733,434	734,439
Total liabilities	301,713	166,272
Sales	738,833	739,453
Profit (loss) for the period	65,495	42,584
KEPCO International HongKong Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	133,915	128,784
Total liabilities	0	0
Sales	0	0
Profit (loss) for the period	8,795	(216)
KEPCO International Philippines Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	72,830	127,744
Total liabilities	0	101
Sales	0	0
Profit (loss) for the period	4,891	9,976
KEPCO Gansu International Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	7,226	7,125
Total liabilities	608	598
Sales	0	0
Profit (loss) for the period	(23)	(22)
KEPCO Philippines Holdings Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	180,592	191,634
Total liabilities	96	129
Sales	0	0
Profit (loss) for the period	8,802	39,346
KEPCO Philippines Corporation
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	2,607	3,799
Total liabilities	0	14
Sales	0	0
Profit (loss) for the period	127	102
KEPCO Ilijan Corporation
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	142,711	231,132
Total liabilities	800	3,642
Sales	0	23,263
Profit (loss) for the period	3,718	16,455
KEPCO Lebanon SARL
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets		1,890
Total liabilities		10,482
Sales		0
Profit (loss) for the period		20
KEPCO Neimenggu International Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	284,280	269,582
Total liabilities	4,346	3,917
Sales	0	0
Profit (loss) for the period	15,021	9,938
KEPCO Shanxi International Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	707,447	597,635
Total liabilities	329,539	222,186
Sales	0	0
Profit (loss) for the period	(3,875)	(11,312)
KOMIPO Global Pte Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	411,249	388,071
Total liabilities	32,900	1,817
Sales	0	0
Profit (loss) for the period	17,174	58,030
KEPCO Netherlands B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	141,088	137,454
Total liabilities	45	64
Sales	0	0
Profit (loss) for the period	3,856	8,570
KEPCO Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	749	579
Total liabilities	34	11
Sales	0	0
Profit (loss) for the period	131	102
KOSEP Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	79,308	74,180
Total liabilities	7,990	13,097
Sales	29,675	52,271
Profit (loss) for the period	10,665	24,443
KOMIPO Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	86,077	81,216
Total liabilities	4,014	10,327
Sales	29,676	52,272
Profit (loss) for the period	9,248	23,368
KOWEPO Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	86,074	81,696
Total liabilities	3,571	10,184
Sales	29,675	52,271
Profit (loss) for the period	9,001	22,745
KOSPO Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	32,828	41,872
Total liabilities	3,923	10,174
Sales	29,675	52,271
Profit (loss) for the period	10,329	24,362
KEPCO Middle East Holding Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	121,015	116,731
Total liabilities	107,611	102,054
Sales	0	0
Profit (loss) for the period	(1,548)	(634)
Qatrana Electric Power Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	491,627	513,277
Total liabilities	208,707	247,027
Sales	26,779	24,354
Profit (loss) for the period	20,949	22,578
KHNP Canada Energy Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	155,242	107,200
Total liabilities	12,379	6,218
Sales	0	0
Profit (loss) for the period	392	149
KEPCO Bylong Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	44,557	44,034
Total liabilities	465,231	437,852
Sales	0	0
Profit (loss) for the period	(16,669)	(45,880)
Korea Waterbury Uranium Limited Partnership
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	20,772	20,934
Total liabilities	44	224
Sales	0	0
Profit (loss) for the period	(67)	(116)
KEPCO Holdings de Mexico
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,171	728
Total liabilities	2,621	1,974
Sales	0	0
Profit (loss) for the period	(121)	(1,363)
KST Electric Power Company, S.A.P.I. de C.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	631,348	653,830
Total liabilities	490,470	528,315
Sales	93,843	232,893
Profit (loss) for the period	19,657	23,122
KEPCO Energy Service Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	2,028	2,238
Total liabilities	716	2,173
Sales	10,193	7,015
Profit (loss) for the period	251	(211)
KEPCO Netherlands S3 B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	70,613	71,326
Total liabilities	16,710	16,419
Sales	0	0
Profit (loss) for the period	1,769	4,465
PT. KOMIPO Pembangkitan Jawa Bali
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	17,303	15,753
Total liabilities	3,929	3,232
Sales	23,639	22,488
Profit (loss) for the period	1,579	3,668
PT. Cirebon Power Service
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	2,936	2,316
Total liabilities	714	784
Sales	9,457	9,602
Profit (loss) for the period	672	355
KOWEPO International Corporation
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	0	0
Total liabilities	10	10
Sales	0	0
Profit (loss) for the period	0	0
KOSPO Jordan LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	19,387	22,854
Total liabilities	3,881	6,964
Sales	17,665	45,009
Profit (loss) for the period	7,082	7,657
EWP America Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	46,954	47,775
Total liabilities	4,032	2,595
Sales	14,549	21,717
Profit (loss) for the period	895	4,337
KNF Canada Energy Limited
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	2,261	2,116
Total liabilities	34	34
Sales	0	0
Profit (loss) for the period	(56)	(59)
EWP Barbados 1 SRL
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	434,690	395,067
Total liabilities	14,217	901
Sales	2,448	3,230
Profit (loss) for the period	36,566	34,260
Gyeonggi Green Energy Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	180,176	220,414
Total liabilities	214,822	226,517
Sales	80,630	112,524
Profit (loss) for the period	(28,549)	(26,004)
PT. Tanggamus Electric Power
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	214,892	227,638
Total liabilities	150,483	163,106
Sales	2,127	3,781
Profit (loss) for the period	(2,230)	5,778
Gyeongju Wind Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	90,616	98,513
Total liabilities	49,982	55,579
Sales	19,807	24,888
Profit (loss) for the period	6,716	9,711
KOMIPO America Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	579,403	571,200
Total liabilities	318,295	317,903
Sales	39,323	34,059
Profit (loss) for the period	3,376	(3,293)
PT. EWP Indonesia
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	90,650	93,390
Total liabilities	132	5
Sales	0	0
Profit (loss) for the period	9,590	4,100
KEPCO Netherlands J3 B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	153,324	135,213
Total liabilities	13,634	63
Sales	0	0
Profit (loss) for the period	15,289	19,396
Korea Offshore Wind Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	334,444	376,449
Total liabilities	143,827	192,335
Sales	40,313	52,526
Profit (loss) for the period	6,497	13,083
Global One Pioneer B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	143	135
Total liabilities	44	41
Sales	0	0
Profit (loss) for the period	(85)	(68)
Global Energy Pioneer B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	336	320
Total liabilities	44	40
Sales	0	0
Profit (loss) for the period	(81)	(64)
Mira Power Limited
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	403,843	416,750
Total liabilities	318,557	310,529
Sales	2,683	57,135
Profit (loss) for the period	(1,590)	12,394
KOSEP Material Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	4,974	3,985
Total liabilities	542	662
Sales	4,834	4,589
Profit (loss) for the period	908	775
Commerce and Industry Energy Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	73,671	79,172
Total liabilities	29,611	32,147
Sales	33,050	31,068
Profit (loss) for the period	(2,901)	(3,730)
KEPCO KPS Philippines Corp.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	5,775	5,294
Total liabilities	884	600
Sales	4,608	5,232
Profit (loss) for the period	97	1,004
KOSPO Chile SpA
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	166,643	159,500
Total liabilities	75,619	70,037
Sales	0	0
Profit (loss) for the period	0	(2,811)
PT. KOWEPO Sumsel Operation and Maintenance Services
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	26	25
Total liabilities	260	252
Sales	0	0
Profit (loss) for the period	0	(94)
Hee Mang Sunlight Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	5,877	5,877
Total liabilities	2,403	2,606
Sales	689	862
Profit (loss) for the period	202	304
Fujeij Wind Power Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	216,082	213,113
Total liabilities	158,081	163,690
Sales	0	0
Profit (loss) for the period	15,067	16,564
KOSPO Youngnam Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	360,026	425,000
Total liabilities	255,761	312,831
Sales	410,173	568,224
Profit (loss) for the period	(7,965)	10,878
Chitose Solar Power Plant LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	98,911	109,964
Total liabilities	84,228	94,366
Sales	14,447	14,384
Profit (loss) for the period	2,059	1,615
KEPCO Energy Solution Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	322,529	317,392
Total liabilities	15,367	6,147
Sales	14,151	33,638
Profit (loss) for the period	5,384	138
KEPCO Solar Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	246,273	243,221
Total liabilities	36,127	25,405
Sales	23,234	24,778
Profit (loss) for the period	8,367	9,305
KOSPO Power Services Ltda.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	6,976	6,722
Total liabilities	7,086	4,762
Sales	17,634	17,911
Profit (loss) for the period	(211)	(358)
Energy New Industry Specialized Investment Private Investment Trust
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	454,888	451,762
Total liabilities	3,364	4,338
Sales	24,030	24,725
Profit (loss) for the period	10,812	7,093
KOEN Bylong Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	11	11
Total liabilities	128	119
Sales	0	0
Profit (loss) for the period	0	(12)
KOMIPO Bylong Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	13	11
Total liabilities	147	122
Sales	0	0
Profit (loss) for the period	(20)	(33)
KOWEPO Bylong Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	12	8
Total liabilities	142	94
Sales	0	0
Profit (loss) for the period	(43)	(7)
KOSPO Bylong Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	388	25
Total liabilities	541	148
Sales	0	0
Profit (loss) for the period	(20)	(17)
EWP Bylong Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	13	8
Total liabilities	13	54
Sales	0	0
Profit (loss) for the period	46	1
KOWEPO Lao International
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	13,038	8,248
Total liabilities	223	87
Sales	10,270	10,010
Profit (loss) for the period	6,268	11,185
KEPCO US Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets		91
Total liabilities		0
Sales		0
Profit (loss) for the period		(19,181)
KEPCO Mangilao Holdings LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	90,445	112,948
Total liabilities	41,898	40,558
Sales	775	21,743
Profit (loss) for the period	785	21,166
Mangilao Investment LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	206,714	258,674
Total liabilities	15	4
Sales	0	0
Profit (loss) for the period	(1)	(1)
KEPCO Mangilao Solar, LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	206,600	240,736
Total liabilities	1,918	373
Sales	13,593	8,870
Profit (loss) for the period	826	(14,818)
Jeju Hanlim Offshore Wind Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	459,229	185,357
Total liabilities	388,171	111,343
Sales	0	0
Profit (loss) for the period	(3,032)	(3,546)
PT. Siborpa Eco Power
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	12,209	12,050
Total liabilities	3	3
Sales	0	0
Profit (loss) for the period	(52)	(39)
PT. Korea Energy Indonesia
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,878	1,675
Total liabilities	101	80
Sales	1,897	1,937
Profit (loss) for the period	132	(104)
KOLAT SpA
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	46,958	48,787
Total liabilities	352	3,701
Sales	2,237	1,647
Profit (loss) for the period	1,820	1,888
KEPCO California, LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	46,606	46,151
Total liabilities	6,823	4,768
Sales	613	596
Profit (loss) for the period	(385)	(670)
KEPCO Mojave Holdings, LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	93,233	95,550
Total liabilities	78,328	75,846
Sales	0	0
Profit (loss) for the period	(3,901)	(4,705)
Incheon Fuel Cell Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	259,169	268,063
Total liabilities	237,409	242,176
Sales	96,924	107,193
Profit (loss) for the period	(4,112)	(5,323)
KOEN Service Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	11,470	9,353
Total liabilities	8,745	7,035
Sales	38,164	36,340
Profit (loss) for the period	305	356
KOMIPO Service Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	7,944	6,597
Total liabilities	4,777	4,503
Sales	37,525	35,031
Profit (loss) for the period	960	905
KOWEPO Service Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	10,300	6,266
Total liabilities	6,584	3,130
Sales	36,421	34,031
Profit (loss) for the period	264	171
KOSPO Service Co., Ltd
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	6,122	6,672
Total liabilities	4,182	5,048
Sales	30,369	28,321
Profit (loss) for the period	703	60
EWP Service Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	5,487	3,756
Total liabilities	3,790	2,507
Sales	26,767	24,526
Profit (loss) for the period	176	581
PT. KOMIPO Energy Indonesia
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	2,983	2,978
Total liabilities	250	368
Sales	2,023	1,698
Profit (loss) for the period	38	83
KNF Partners Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	2,589	2,285
Total liabilities	1,106	1,053
Sales	6,380	5,997
Profit (loss) for the period	340	293
KOSPO USA Inc.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	378,732	315,018
Total liabilities	377	430
Sales	0	0
Profit (loss) for the period	(6,351)	5,024
Nambu USA LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	297,370	297,516
Total liabilities	230	0
Sales	0	0
Profit (loss) for the period	(732)	670
Tamra Offshore Wind Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	120,460	133,598
Total liabilities	83,161	93,639
Sales	18,570	18,332
Profit (loss) for the period	1,089	5,316
KEPCO MCS Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	111,189	114,316
Total liabilities	73,940	52,241
Sales	307,146	363,627
Profit (loss) for the period	(4,757)	8,468
KEPCO FMS Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	21,310	16,852
Total liabilities	18,142	11,667
Sales	107,336	105,339
Profit (loss) for the period	1,895	2,176
Firstkeepers Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	18,698	16,448
Total liabilities	12,437	12,912
Sales	90,575	84,620
Profit (loss) for the period	2,689	2,482
Secutec Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	16,038	12,578
Total liabilities	11,797	9,209
Sales	72,284	69,383
Profit (loss) for the period	699	690
SE Green Energy Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	147,251	149,189
Total liabilities	114,737	114,241
Sales	40,326	49,873
Profit (loss) for the period	(1,305)	1,304
Mangilao Intermediate Holdings LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	206,771	236,266
Total liabilities	114,954	116,426
Sales	0	0
Profit (loss) for the period	(5,293)	(4,709)
KEPCO CSC Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	15,985	10,668
Total liabilities	12,170	8,937
Sales	49,502	46,559
Profit (loss) for the period	2,644	(2,134)
KOAK Power Limited
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	15,000	12,626
Total liabilities	528	839
Sales	0	0
Profit (loss) for the period	714	49
KOMIPO Europe B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	86,109	81,364
Total liabilities	69	54
Sales	1,183	1,195
Profit (loss) for the period	109	1,134
Haenanum Energy Fund
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	7,415	7,416
Total liabilities	3	3
Sales	47	0
Profit (loss) for the period	(1)	(48)
Paju Ecoenergy Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	60,653	61,930
Total liabilities	2,146	3,066
Sales	15,351	20,718
Profit (loss) for the period	(357)	1,290
Guam Ukudu Power LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	749,837	293,422
Total liabilities	720,795	323,292
Sales	0	0
Profit (loss) for the period	(19,904)	(31,410)
K-SOLAR SHINAN Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	298,866	320,227
Total liabilities	281,676	296,141
Sales	37,137	16,980
Profit (loss) for the period	(6,896)	3,690
KPS Partners Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	3,503	3,619
Total liabilities	1,776	2,007
Sales	12,921	12,417
Profit (loss) for the period	183	487
KEPCO E&C Service Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	7,167	5,676
Total liabilities	1,938	1,897
Sales	16,454	16,180
Profit (loss) for the period	1,505	1,493
Moha Solar Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	27,213	29,096
Total liabilities	29,363	31,359
Sales	0	169
Profit (loss) for the period	112	(1,137)
Ogiri Solar Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,032	1,033
Total liabilities	31	23
Sales	0	0
Profit (loss) for the period	(9)	(30)
KHNP USA LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,517	1,290
Total liabilities	140	97
Sales	1,142	1,127
Profit (loss) for the period	166	392
KOMIPO Vanphong Power Service LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	26,819	15,940
Total liabilities	3,768	3,333
Sales	21,396	20,233
Profit (loss) for the period	10,879	9,871
Energy Innovation Fund I
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	43,725	35,310
Total liabilities	419	445
Sales	0	0
Profit (loss) for the period	(766)	(961)
KHNP Chile SpA
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	5,555	5,547
Total liabilities	4,219	4,147
Sales	0	0
Profit (loss) for the period	(66)	(16)
Yeong Yang Apollon Photovoltaic Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,529	1,566
Total liabilities	1,427	1,507
Sales	219	254
Profit (loss) for the period	42	(82)
Yeong Yang Corporation Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,519	1,559
Total liabilities	1,418	1,497
Sales	216	251
Profit (loss) for the period	39	(91)
SolarVader Co., Ltd
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,529	1,568
Total liabilities	1,421	1,500
Sales	219	256
Profit (loss) for the period	40	(78)
Yeong Yang Innovation Co., Ltd
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,510	1,557
Total liabilities	1,418	1,497
Sales	210	244
Profit (loss) for the period	32	(91)
Yeong Yang Horus Photovoltaic Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,502	1,552
Total liabilities	1,418	1,498
Sales	206	243
Profit (loss) for the period	28	(93)
Yeong Yang Solar Management Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,540	1,573
Total liabilities	1,420	1,500
Sales	224	262
Profit (loss) for the period	46	(75)
LSG Hydro Power Limited
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	717	1,144
Total liabilities	8	1,159
Sales	0	0
Profit (loss) for the period	(219)	(18)
KOEN Bio Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,010	261
Total liabilities	585	219
Sales	2,467	639
Profit (loss) for the period	372	(150)
KOMIPO Iberian Solar Group, S.L.U.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	79,666	78,094
Total liabilities	66,874	65,012
Sales	0	0
Profit (loss) for the period	(931)	(1,304)
Jeongam Wind Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	75,744	81,800
Total liabilities	63,219	68,317
Sales	8,154	10,722
Profit (loss) for the period	(958)	892
KOWEPO Europe B.V.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	107	42,865
Total liabilities	3,177	2,422
Sales	0	0
Profit (loss) for the period	(44,685)	1,668
Yeongdeok Sunrise Wind Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	94,615	42,187
Total liabilities	74,842	22,031
Sales	0	0
Profit (loss) for the period	(383)	(328)
KHNP Spain, S.L.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets		3
Total liabilities		0
Sales		0
Profit (loss) for the period		(1)
KA Power Limited
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	3,173	3,937
Total liabilities	172	418
Sales	0	0
Profit (loss) for the period	126	442
Western Power Changgi Solar Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	46,950	48,770
Total liabilities	40,815	44,647
Sales	7,036	3,447
Profit (loss) for the period	2,011	(354)
EWP Australia Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	52,734	51,105
Total liabilities	0	0
Sales	325	0
Profit (loss) for the period	337	15,203
Columboola Solar Farm Hold Co Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	311,259	310,271
Total liabilities	213,822	214,792
Sales	10,072	2,228
Profit (loss) for the period	3,217	2,884
Digital Innovation Growth Fund
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	11,624	12,594
Total liabilities	96	100
Sales	0	0
Profit (loss) for the period	(266)	(363)
J Wind First, LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	52,304	33,611
Total liabilities	52,304	33,611
Sales	2,540	450
Profit (loss) for the period	0	0
KEPCO Holding Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	3,307	3,273
Total liabilities	0	17
Sales	0	0
Profit (loss) for the period	(23)	(18)
KEPCO for Power Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets		57,501
Total liabilities		58,441
Sales		0
Profit (loss) for the period		(960)
KEPCO for Maintenance Company
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	118	0
Total liabilities	0	0
Sales	0	0
Profit (loss) for the period	(45)	0
KOSPO Trumbull LLC
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	25	37
Total liabilities	0	3
Sales	0	0
Profit (loss) for the period	(10)	0
Changjuk Wind Power Co., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	24,364	29,208
Total liabilities	3,049	3,137
Sales	6,230	9,027
Profit (loss) for the period	744	₩ 3,503
Chile Solar JV SpA
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	98,705
Total liabilities	75,472
Sales	9,050
Profit (loss) for the period	(2,768)
KEPCO KPS South Africa Pty., Ltd.
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	9,222
Total liabilities	4,236
Sales	8,512
Profit (loss) for the period	834
KOWEPO Holding Limited
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items]
Total assets	1,323
Total liabilities	1,371
Sales	0
Profit (loss) for the period	₩ (49)

Consolidated Subsidiaries - S_4

Consolidated Subsidiaries - Summary of Significant Restrictions on Abilities to Subsidiaries (Details) ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Gyeonggi Green Energy Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Acquisition or disposal of assets of more than W10 billion, change in the capacity of cogeneration units (except for the change due to performance improvement of equipment, maintenance) will require unanimous consent of all directors of the Company.
Assets to which significant restrictions apply	₩ 10,000
KOSPO Youngnam Power [Member]
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends may be payable only when all conditions of the loan agreement are satisfied. Group’s shares cannot be wholly or partially transferred without prior written consent of financial institutions.
Jeongam Wind Power Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends may be payable only when all conditions of the loan agreement are satisfied, and prior written consent of financial institutions is obtained. Also, payments to the contracting party may be restricted depending on the financial management priority of the contract. Group’s shares cannot be wholly or partially transferred without prior consent of other stakeholders including shareholders or financial institutions.
Jeongam Wind Power Co., Ltd. | Shareholders agreements [member]
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	When the Company requests other shareholders to transfer shares after the completion of the power generation complex, the Company has a right to purchase the shares at fair value.
Incheon Fuel Cell Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Acquisition or disposal of assets of more than W20 billion, change in the capacity of cogeneration units (except for the change due to performance improvement of equipment, maintenance) will require unanimous consent of all directors of the Company.
Assets to which significant restrictions apply	₩ 20,000
Gyeongju Wind Power Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends and settlement amounts for O&M and renewable energy certificate may be payable only when all conditions of the loan agreement are satisfied, and prior written consent of financial institutions is obtained.
Korea Offshore Wind Power Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Principals and interest on subordinated loans or dividends and settlement amounts for renewable energy certificate may be payable only when all conditions of the loan agreement are satisfied and prior written consent of financial institutions is obtained. The Company’s equity interest in the subsidiary may be transferred either wholly or partially without prior written consent of financial institutions.
Jeju Hanlim Offshore Wind Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Prior approval from the lender is required when withdrawing funds (major expenditure, REC settlement, dividend payment, etc.) according to the loan agreement.
Yeongdeok Sunrise Wind Power Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends may be payable only when all conditions of the loan agreement are satisfied.
Columboola Solar Farm Hold Co Pty., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends may be payable only when all conditions of the loan agreement are satisfied.
Columboola Solar Farm Hold Co Pty., Ltd. | Shareholders agreements [member]
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	The Company holds a call option to purchase the shares held by another shareholder at 80% of the stock's valuation in the event of a breach of obligation specified in the shareholder agreement.
Guam Ukudu Power LLC
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends may be payable only when all conditions of the loan agreement are satisfied. Disposing or transferring assets either as a whole or as a part is restricted, and the Company’s equity interest in the subsidiary may not be transferred either wholly or partially without prior consent of other stakeholders including financial institutions.
Changjuk Wind Power Co., Ltd. | Shareholders agreements [member]
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	When other shareholders want to sell their shares after the performance guarantee period of wind power generators stipulated in the equipment supply contract is completed, the Company has an obligation to purchase the shares at fair value after consulting with the parties on the timing and size of the acquisition, taking in to account financial conditions, business conditions, and other circumstances.
KOSPO Trumbull LLC
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	The Company’s equity interest may not be transferred either wholly or partially without prior consent of other shareholders.
Mira Power Limited
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	The Company’s equity interest may be transferred either wholly or partially without prior consent of other stakeholders.
Chile Solar JV SpA
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	The Company’s equity interest may be transferred either wholly or partially without prior consent of other stakeholders.
K-SOLAR SHINAN Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends may be payable only when all conditions of the loan agreement are satisfied. The Company’s equity interest may not be transferred either wholly or partially without prior consent of other stakeholders until five years have elapsed after the commencement of the operation.
Western Power Changgi Solar Co., Ltd.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Principals and interest on subordinated loans or dividends to investors are only payable when all conditions of the loan agreement are satisfied, and prior written consent of financial institutions is obtained. Also, the Company’s equity interest may not be transferred either wholly or partially without prior written consent of financial institutions.
Chitose Solar Power Plant LLC
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Capital expenditure may be incurred only upon prior consent of financial institutions. The issuance of securities to third parties, including current investors, is restricted, and the amount of paid-in capital cannot either increase, be written off or decrease.
Mangilao Intermediate Holdings LLC
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Changes or termination of the O&M contract, and delays in the EPC contract may not be made without the prior written consent of the majority of the lenders, and dividends can be implemented only after repayment of the loan is completed.
Fujeij Wind Power Company
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Incurring additional borrowings not specified in the loan agreement, or changing the PPA schedule or the EPC contract without the lender’s prior written consent is restricted. Also, commercial operation before acquiring wind turbine is restricted without prior consent from the EPC contractor. In addition, capital acquisition and new share issuance other than dividends payment to investors are restricted.
Qatrana Electric Power Company
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Dividends payment, repayment of capital investment, and settlement for O&M can only be made when all conditions of the loan agreement are satisfied and prior consent of financial institutions is obtained.
KST Electric Power Company, S.A.P.I. de C.V.
Disclosure Of Significant Restrictions On Abilities To Subsidiaries Explanatory [Line Items]
Description of significant restrictions on entity's ability to access or use assets and settle liabilities of group	Disposal of assets exceeding $5 million per year is restricted, and the debt ratio is required to be maintained below 90%. Additionally, capital and cost expenditures that do not meet the conditions in the loan agreement are restricted.
Assets to which significant restrictions apply	₩ 5
Requirement of debt ratio to be maintained	90%

Consolidated Subsidiaries - S_5

Consolidated Subsidiaries - Summary of Non-Controlling Interest Prior to Intra-Group Eliminations (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items]
Current assets	₩ 2,735,212	₩ 2,611,740	₩ 2,312,226
Non-current assets of subsidiaries	5,680,421	6,080,580	4,940,873
Current liabilities of subsidiaries	(1,573,191)	(1,405,456)	(1,078,273)
Non-current liabilities of subsidiaries	(2,800,982)	(3,000,673)	(2,729,199)
Net assets of subsidiaries	4,041,460	4,286,191	3,445,627
Book value of non-controlling interest	1,419,707	1,454,860	1,546,434
Sales	3,280,495	3,663,857	3,155,329
Profit for the year	261,366	223,856	255,829
Profit for the year attributable to non-controlling interest of subsidiaries	106,405	37,745	88,941
Cash flows from operating activities of subsidiaries	373,994	386,465	536,907
Cash flows from investing activities of subsidiaries	(501,190)	(678,819)	(327,614)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries	(17,359)	532,524	(2,308)
Dividends to non-controlling interests of subsidiaries	(55,534)	(42,344)	(31,516)
Effect of exchange rate fluctuation of subsidiaries	7,459	(2,697)	18,849
Net increase (decrease) of cash and cash equivalents of subsidiaries	₩ (192,630)	₩ 195,129	₩ 194,318
KEPCO Ilijan Corporation
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items]
Percentage of ownership	49%	49%	49%
Current assets	₩ 142,023	₩ 230,031	₩ 234,224
Non-current assets of subsidiaries	688	1,101	24,845
Current liabilities of subsidiaries	(252)	(3,642)	(30,783)
Non-current liabilities of subsidiaries	(548)	0	(7,772)
Net assets of subsidiaries	141,911	227,490	220,514
Book value of non-controlling interest	69,536	111,470	108,052
Sales	0	23,263	60,532
Profit for the year	3,718	16,455	12,981
Profit for the year attributable to non-controlling interest of subsidiaries	1,822	8,063	6,361
Cash flows from operating activities of subsidiaries	1,086	68,475	116,440
Cash flows from investing activities of subsidiaries	84	22,604	2,216
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries	(93,348)	(9,609)	(88,927)
Dividends to non-controlling interests of subsidiaries	(643)	(8,834)	0
Effect of exchange rate fluctuation of subsidiaries	5,135	8,807	10,683
Net increase (decrease) of cash and cash equivalents of subsidiaries	₩ (87,686)	₩ 81,443	₩ 40,412
KEPCO Plant Service & Engineering Co., Ltd.
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items]
Percentage of ownership	49%	49%	49%
Current assets	₩ 953,211	₩ 861,705	₩ 793,995
Non-current assets of subsidiaries	632,169	693,748	626,710
Current liabilities of subsidiaries	(313,249)	(316,497)	(265,017)
Non-current liabilities of subsidiaries	(5,348)	(28,205)	(46,590)
Net assets of subsidiaries	1,266,783	1,210,751	1,109,098
Book value of non-controlling interest	620,723	593,268	543,458
Sales	1,523,031	1,425,913	1,375,668
Profit for the year	161,849	97,881	98,132
Profit for the year attributable to non-controlling interest of subsidiaries	79,306	47,962	48,085
Cash flows from operating activities of subsidiaries	(35,492)	81,419	133,160
Cash flows from investing activities of subsidiaries	26,915	27,372	(39,444)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries	(36,433)	(33,187)	(30,599)
Dividends to non-controlling interests of subsidiaries	(28,775)	(26,438)	(25,269)
Effect of exchange rate fluctuation of subsidiaries	(454)	(486)	885
Net increase (decrease) of cash and cash equivalents of subsidiaries	₩ (74,239)	₩ 48,680	₩ 38,733
KEPCO Engineering & Construction Company, Inc.
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items]
Percentage of ownership	48.76%	33.92%	33.92%
Current assets	₩ 446,900	₩ 372,031	₩ 253,958
Non-current assets of subsidiaries	407,804	443,502	451,085
Current liabilities of subsidiaries	(249,899)	(243,796)	(183,100)
Non-current liabilities of subsidiaries	(57,497)	(28,323)	(8,492)
Net assets of subsidiaries	547,308	543,414	513,451
Book value of non-controlling interest	266,867	184,326	174,163
Sales	545,092	505,291	433,127
Profit for the year	32,654	17,954	16,452
Profit for the year attributable to non-controlling interest of subsidiaries	15,922	6,090	5,581
Cash flows from operating activities of subsidiaries	39,985	4,918	(16,270)
Cash flows from investing activities of subsidiaries	(19,345)	18,712	19,061
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries	(6,687)	(7,260)	(8,467)
Dividends to non-controlling interests of subsidiaries	(5,250)	(3,071)	(3,639)
Effect of exchange rate fluctuation of subsidiaries	(35)	5	38
Net increase (decrease) of cash and cash equivalents of subsidiaries	8,668	13,304	(9,277)
Others
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items]
Current assets	1,193,078	1,147,973	1,030,049
Non-current assets of subsidiaries	4,639,760	4,942,229	3,838,233
Current liabilities of subsidiaries	(1,009,791)	(841,521)	(599,373)
Non-current liabilities of subsidiaries	(2,737,589)	(2,944,145)	(2,666,345)
Net assets of subsidiaries	2,085,458	2,304,536	1,602,564
Book value of non-controlling interest	462,581	565,796	720,761
Sales	1,212,372	1,709,390	1,286,002
Profit for the year	63,145	91,566	128,264
Profit for the year attributable to non-controlling interest of subsidiaries	9,355	(24,370)	28,914
Cash flows from operating activities of subsidiaries	368,415	231,653	303,577
Cash flows from investing activities of subsidiaries	(508,844)	(747,507)	(309,447)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries	119,109	582,580	125,685
Dividends to non-controlling interests of subsidiaries	(20,866)	(4,001)	(2,608)
Effect of exchange rate fluctuation of subsidiaries	2,813	(11,023)	7,243
Net increase (decrease) of cash and cash equivalents of subsidiaries	₩ (39,373)	₩ 51,702	₩ 124,450

Consolidated Subsidiaries - S_6

Consolidated Subsidiaries - Summary of Changes in Goodwill (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	₩ 99,156	₩ 100,093
Goodwill, Beginning	100,093	105,647
Increase	1,859	0
Decrease	0	0
Impairment	(2,582)
Others	(214)	(5,554)
Goodwill, Ending	99,156	100,093
Acquisition cost
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	101,738	100,093
Goodwill, Beginning	100,093	105,647
Increase	1,859	0
Decrease	0	0
Impairment	0
Others	(214)	(5,554)
Goodwill, Ending	101,738	100,093
Less: Accumulated impairment
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	(2,582)	0
Goodwill, Beginning	0	0
Increase	0	0
Decrease	0	0
Impairment	(2,582)
Others	0	0
Goodwill, Ending	₩ (2,582)	₩ 0

Consolidated Subsidiaries - S_7

Consolidated Subsidiaries - Summary of Cash Dividends Received from Subsidiaries (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Subsidiaries
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	₩ 3,575,130	₩ 466,268	₩ 454,255
Korea Hydro & Nuclear Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	1,560,120	136,010	279,779
Korea South-East Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	340,710	4,808	0
Korea Midland Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	291,558	24,694	0
Korea Western Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	344,756	0	0
Korea Southern Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	293,027	0	0
Korea East-West Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	300,436	4,866	0
KEPCO Engineering & Construction Company, Inc.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	7,114	5,983	7,089
KEPCO Plant Service & Engineering Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	29,952	27,517	26,301
KEPCO Nuclear Fuel Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	15,178	11,184	5,206
KEPCO KDN Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	185,549	36,986	18,854
KEPCO Energy Solution Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	9,480	1,707	0
KEPCO Solar Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	16,023	1,409	0
KEPCO MCS Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	15,353	0	0
KEPCO International HongKong Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	5,962	9,044	0
KEPCO Philippines Corporation
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	24,246	2,375	0
KEPCO Ilijan Corporation
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	1,298	9,195	7,955
KEPCO Philippines Holdings Inc.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	1,386	34,913	60,520
KOSPO Australia Pty., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	0	31,386	3,095
KEPCO Netherlands B.V.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	3,124	16,795	0
Qatrana Electric Power Company
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	6,511	2,751	2,615
KEPCO KPS Philippines Corp.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	0	302	0
Tamra Offshore Wind Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	3,863	2,877	0
KEPCO Netherlands S3 B.V.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	2,477	4,005	0
PT. KOMIPO Pembangkitan Jawa Bali
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	578	859	153
PT. EWP Indonesia
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	0	4,262	0
Gyeongju Wind Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	6,300	2,100	2,800
KOSPO Power Services Ltda.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	1,201	305	0
KEPCO Netherlands J3 B.V.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	13,144	46,510	27,237
PT. Cirebon Power Service
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	12,673	241	0
Chitose Solar Power Plant LLC
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	1,386	639	0
Fujeij Wind Power Company
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	6,047	15,102	11,920
KOSPO Jordan LLC
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	6,089	11,450	731
EWP America Inc.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	0	3,887	0
KOWEPO Lao International
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	0	12,106	0
KEPCO Neimenggu International Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	4,058	0	0
KST Electric Power Company, S.A.P.I. de C.V.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	3,145	0	0
KOMIPO Global Pte Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	31,066	0	0
KOSPO Australia Pty., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	12,558	0	0
Changjuk Wind Power Co., Ltd.
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	4,015	0	0
EWP Barbados 1 SRL
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	12,987	0	0
KEPCO Energy Service Company
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	629	0	0
Chile Solar JV SpA
Disclosure of Cash dividends received from subsidiaries [Line Items]
Cash dividends received from subsidiaries	₩ 1,127	₩ 0	₩ 0

Investments in Associates 1 (De

Investments in Associates 1 (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Disclosure of associates [line items]
Location				Korea
Acquisition cost		₩ 3,509,099		₩ 3,089,683
Book value		₩ 6,176,889		₩ 5,844,464		₩ 5,232,373
Korea Gas Corporation
Disclosure of associates [line items]
Key operation activities		Importing and wholesaling LNG		Importing and wholesaling LNG
Location		Korea		Korea
Percentage of ownership		20.47%		20.47%
Acquisition cost		₩ 94,500		₩ 94,500
The fair value of associates	[1]	466,830		684,180
Book value		₩ 1,970,643		₩ 2,085,296		1,815,513
Korea Electric Power Industrial Development Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Electricity metering and others		Electricity metering and others
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 4,727		₩ 4,727
The fair value of associates		69,298		80,454
Book value		₩ 29,500		₩ 31,078		24,617
YTN Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Broadcasting	[2]	Broadcasting	[3]
Location	[2],[3]	Korea
Percentage of ownership		21.43%	[2]	21.43%	[3]
Acquisition cost		₩ 59,000	[2]	₩ 59,000	[3]
The fair value of associates	[4]	54,180		50,220
Book value		₩ 52,303	[2]	₩ 55,027	[3]	51,828
Gangwon Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	15%		15%
Acquisition cost	[5]	₩ 5,725		₩ 5,725
Book value		₩ 12,001	[5]	₩ 12,158	[5]	10,554
Hyundai Green Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation equipment consignment and operation service		Power generation equipment consignment and operation service
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 88,885		₩ 88,885
Book value		₩ 118,173		₩ 119,791		121,955
Korea Power Exchange
Disclosure of associates [line items]
Key operation activities	[6]	Management of power market and others		Management of power market and others
Location	[6]	Korea		Korea
Percentage of ownership	[6]	100%		100%
Acquisition cost	[6]	₩ 127,839		₩ 127,839
Book value		274,286	[6]	275,126	[6]	269,728
Dayone Energy Co., Ltd.
Disclosure of associates [line items]
Unrecognized equity interest		937		3,565
Accumulated unrecognized equity interest		27,954		₩ 27,017
Taebaek Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[7]			Power generation
Location	[7]			Korea
Percentage of ownership	[7]			60%
Acquisition cost	[7]			₩ 11,494
Book value		₩ 0		₩ 14,501	[7]	6,800
Taebaek Guinemi Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation	[8]	Power generation	[7]
Location		Korea	[8]	Korea	[7]
Percentage of ownership		67.25%	[8]	67.25%	[7]
Acquisition cost		₩ 12,637	[8]	₩ 12,637	[7]
Book value		₩ 13,530	[8]	₩ 13,049	[7]	3,357
Daeryun Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	6.85%		6.85%
Acquisition cost	[5]	₩ 46,373		₩ 40,854
Book value		₩ 26,834	[5]	₩ 26,727	[5]	25,426
KNH Solar Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		27%		27%
Acquisition cost		₩ 1,296		₩ 1,296
Book value		₩ 3,194		₩ 2,883		2,278
SPC Power Corporation
Disclosure of associates [line items]
Key operation activities		Power generation	[9]	Power generation	[10]
Location		Philippines	[9]	Philippines	[10]
Percentage of ownership		38%	[9]	38%	[10]
Acquisition cost		₩ 20,635	[9]	₩ 20,635	[10]
The fair value of associates		92,219		121,995
Book value		₩ 78,931	[9]	₩ 70,868	[10]	65,046
Gemeng International Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		China		China
Percentage of ownership		42%		34%
Acquisition cost		₩ 516,007		₩ 413,153
Book value		₩ 705,812		₩ 578,821		595,218
PT. Cirebon Electric Power
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Indonesia		Indonesia
Percentage of ownership		27.50%		27.50%
Acquisition cost		₩ 40,365		₩ 40,365
Book value		₩ 134,259		₩ 135,114		121,969
KNOC Nigerian East Oil Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[11]	Resources development		Resources development
Location	[11]	Nigeria		Nigeria
Percentage of ownership	[11]	14.63%		14.63%
Acquisition cost	[11]	₩ 12		₩ 12
Book value		₩ 0	[11]	₩ 0	[11]	0
KNOC Nigerian West Oil Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[11]	Resources development		Resources development
Location	[11]	Nigeria		Nigeria
Percentage of ownership	[11]	14.63%		14.63%
Acquisition cost	[11]	₩ 12		₩ 12
Book value		₩ 0	[11]	₩ 0	[11]	0
PT Wampu Electric Power
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Indonesia		Indonesia
Percentage of ownership		46%		46%
Acquisition cost		₩ 21,292		₩ 21,292
Book value		₩ 34,555		₩ 37,743		35,077
PT. Bayan Resources TBK
Disclosure of associates [line items]
Key operation activities		Resources development		Resources development
Location		Indonesia		Indonesia
Percentage of ownership		20%		20%
Acquisition cost		₩ 615,860		₩ 615,860
The fair value of associates		11,090,934		11,326,001
Book value		₩ 619,207		₩ 684,719		661,289
S-Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		49%		49%
Acquisition cost		₩ 132,300		₩ 132,300
Book value		₩ 162,765		₩ 141,128		122,786
Pioneer Gas Power Limited
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		India		India
Percentage of ownership		38.50%		38.50%
Acquisition cost		₩ 49,831		₩ 49,831
Book value		0		0		0
Unrecognized equity interest		19,835		19,248
Accumulated unrecognized equity interest		76,712		₩ 56,877
Eurasia Energy Holdings
Disclosure of associates [line items]
Key operation activities				Power generation and resources development
Location				Russia
Percentage of ownership				40%
Acquisition cost				₩ 461
Book value		0		0		0
Unrecognized equity interest		(203)		13
Accumulated unrecognized equity interest		₩ 0		₩ 203
Xe-Pian Xe-Namnoy Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Laos		Laos
Percentage of ownership		25%		25%
Acquisition cost		₩ 87,426		₩ 87,426
Book value		₩ 116,378		₩ 115,584		92,441
PT. Mutiara Jawa
Disclosure of associates [line items]
Key operation activities		Manufacturing and operating floating coal terminal		Manufacturing and operating floating coal terminal
Location		Indonesia		Indonesia
Percentage of ownership		29%		29%
Acquisition cost		₩ 2,978		₩ 2,978
Book value		₩ 5,168		₩ 3,597		2,569
Samcheok Eco Materials Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Recycling fly ashes	[12]	Recycling fly ashes	[13]
Location		Korea	[12]	Korea	[13]
Percentage of ownership		25.54%	[12]	2.35%	[13]
Acquisition cost		₩ 686	[12]	₩ 686	[13]
Book value		0	[12]	0	[13]
Unrecognized equity interest		3,625		344
Accumulated unrecognized equity interest		₩ 4,431		₩ 806
Noeul Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 1,740		₩ 1,740
Book value		0		0		3,808
Unrecognized equity interest		(258)		5,470
Accumulated unrecognized equity interest		5,212		5,470
Naepo Green Energy Co., Ltd.
Disclosure of associates [line items]
Unrecognized equity interest		(14,956)		7,209
Accumulated unrecognized equity interest		₩ 0		₩ 14,956
Goseong Green Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 262,740		₩ 262,740
Book value		₩ 287,624		₩ 288,893		260,858
Gangneung Eco Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation	[14]	Power generation	[5]
Location		Korea	[14]	Korea	[5]
Percentage of ownership		29%	[14]	1.61%	[5]
Acquisition cost		₩ 261,000	[14]	₩ 2,900	[5]
Book value		254,929	[14]	0	[5]	2,288
Unrecognized equity interest		(14)		14
Accumulated unrecognized equity interest		₩ 0		₩ 14
Shin Pyeongtaek Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		40%		40%
Acquisition cost		₩ 72,000		₩ 72,000
Book value		₩ 145,026		₩ 133,823		93,074
Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		28%		28%
Acquisition cost		₩ 194		₩ 194
Book value		₩ 294		₩ 278		223
Dongducheon Dream Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[15]	Power generation		Power generation
Location	[15]	Korea		Korea
Percentage of ownership	[15]	33.61%		33.61%
Acquisition cost	[15]	₩ 148,105		₩ 148,105
Book value		₩ 87,203	[15]	₩ 89,300	[15]	74,198
Jinbhuvish Power Generation Pvt. Ltd.
Disclosure of associates [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	India		India
Percentage of ownership	[5]	5.16%		5.16%
Acquisition cost	[5]	₩ 9,000		₩ 9,000
Book value		₩ 0	[5]	₩ 0	[5]	0
Daejung Offshore Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		46.59%		46.59%
Acquisition cost		₩ 5,190		₩ 5,190
Book value		₩ 1,483		₩ 1,555		1,704
GS Donghae Electric Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		34%		34%
Acquisition cost		₩ 204,000		₩ 204,000
Book value		₩ 259,085		₩ 260,145		243,772
Daegu Photovoltaic Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 1,230		₩ 1,230
Book value		₩ 2,804		₩ 2,849		2,342
Busan Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 5,243		₩ 5,243
Book value		3,259		₩ 4,395		5,032
Gunsan Bio Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[5]			Power generation
Location	[5]			Korea
Percentage of ownership	[5]			18.87%
Acquisition cost	[5]			₩ 1,000
Book value		0		0	[5]	0
Unrecognized equity interest	[16]	0		122
Accumulated unrecognized equity interest	[16]	₩ 0		₩ 3,986
Hansuwon KNP Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Electric material agency		Electric material agency
Location		Korea		Korea
Percentage of ownership		28.98%		28.98%
Acquisition cost		₩ 537		₩ 537
Book value		₩ 467		₩ 280		219
Korea Electric Power Corporation Fund
Disclosure of associates [line items]
Key operation activities	[17]	Developing electric enterprises		Developing electric enterprises
Location	[17]	Korea		Korea
Percentage of ownership	[17]	98.09%		98.09%
Acquisition cost	[17]	₩ 20,847		₩ 23,113
Book value		₩ 23,421	[17]	₩ 28,842	[17]	47,983
Energy Infra Asset Management Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Asset management	[18]	Asset management	[5]
Location		Korea	[18]	Korea	[5]
Percentage of ownership		9.90%	[18]	9.90%	[5]
Acquisition cost		₩ 297	[18]	₩ 297	[5]
Book value		₩ 1,213	[18]	₩ 1,184	[5]	1,066
Daegu clean Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Renewable power generation		Renewable power generation
Location		Korea		Korea
Percentage of ownership		28%		28%
Acquisition cost		₩ 140		₩ 140
Book value		₩ 0		₩ 12		12
YaksuESS Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Installing ESS related equipment		Installing ESS related equipment
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 210		₩ 210
Book value		₩ 285		₩ 486		716
Nepal Water & Energy Development Company Private Limited
Disclosure of associates [line items]
Key operation activities	[19]	Construction and operation of utility plant	[14]	Construction and operation of utility plant
Location	[19]	Nepal	[14]	Nepal
Percentage of ownership	[19]	68.88%	[14]	69.06%
Acquisition cost	[19]	₩ 110,332	[14]	₩ 70,228
Book value		₩ 110,573	[14],[19]	₩ 69,940	[19]	66,333
Gwangyang Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 26,800		₩ 26,800
Book value		₩ 24,638		₩ 25,044		25,466
PND Solar Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 1,250		₩ 1,250
Book value		₩ 1,510		₩ 1,403		1,229
Hyundai Eco Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	19%		19%
Acquisition cost	[5]	₩ 3,610		₩ 3,610
Book value		₩ 7,947	[5]	₩ 7,631	[5]	5,572
YeongGwang Yaksu Wind Electric Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	9.63%		9.63%
Acquisition cost	[5]	₩ 533		₩ 533
Book value		₩ 133	[5]	₩ 156	[5]	233
Green Energy Electricity Generation Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 1,189		₩ 1,189
Book value		₩ 8		₩ 1,571		1,713
Korea Energy Solutions Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 300		₩ 300
Book value		₩ 170		₩ 93		123
ITR Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D	[20]	R & D
Location		Korea	[20]	Korea
Percentage of ownership		10%	[20]	20%
Acquisition cost		₩ 50	[20]	₩ 50
Book value		0	[20]	0		32
Unrecognized equity interest		(4)		5
Accumulated unrecognized equity interest		₩ 1		₩ 5
STN Co., Ltd. (formerly, Structure test network Co., Ltd..)
Disclosure of associates [line items]
Key operation activities		Technical testing and consulting		Technical testing and consulting
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 25		₩ 25
Book value		391		₩ 366		306
Namjeongsusang Solar Power Operation Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[21]			Power generation
Location	[21]			Korea
Percentage of ownership	[21]			15%
Acquisition cost	[21]			₩ 969
Book value		₩ 0		₩ 373	[21]	361
Indeck Niles Development, LLC
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		50%		50%
Acquisition cost		₩ 263,825		₩ 263,825
Book value		₩ 335,401		₩ 302,038		246,273
Indeck Niles Asset Management, LLC
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		33.33%		33.33%
Acquisition cost		₩ 0		₩ 0
Book value		₩ 93		₩ 94		111
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1
Disclosure of associates [line items]
Key operation activities		Holding company		Holding company
Location		Korea		Korea
Percentage of ownership		49%		49%
Acquisition cost		₩ 6,482		₩ 6,910
Book value		₩ 6,496		₩ 6,932		7,138
Suwon New Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		39.90%		39.90%
Acquisition cost		₩ 798		₩ 798
Book value		₩ 1,022		₩ 919		1,035
Gwangbaek Solar Power Investment Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		44%		44%
Acquisition cost		₩ 4,757		₩ 4,757
Book value		₩ 5,155		₩ 5,133		4,806
Go deok Clean Energy Co., Ltd
Disclosure of associates [line items]
Key operation activities		Fuel cell generation		Fuel cell generation
Location		Korea		Korea
Percentage of ownership		40%		40%
Acquisition cost		₩ 5,560		₩ 5,560
Book value		₩ 4,723		₩ 4,420		4,302
SureDataLab Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		23.95%		23.95%
Acquisition cost		₩ 126		₩ 126
Book value		₩ 114		₩ 177		128
SEP Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		21.26%		21.26%
Acquisition cost		₩ 27		₩ 27
Book value		0		0		7
Unrecognized equity interest		1		14
Accumulated unrecognized equity interest		₩ 15		₩ 14
Hankook Electric Power Information Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[22]	R & D		R & D
Location	[22]	Korea		Korea
Percentage of ownership	[22]	16.49%		16.49%
Acquisition cost	[22]	₩ 38		₩ 38
Book value		₩ 214	[22]	₩ 220	[22]	161
Tronix Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[22]	R & D		R & D
Location	[22]	Korea		Korea
Percentage of ownership	[22]	12.50%		12.50%
Acquisition cost	[22]	₩ 75		₩ 75
Book value		₩ 220	[22]	₩ 66	[22]	109
O2&B Global Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 25		₩ 25
Book value		₩ 21		₩ 36		35
Muan Sunshine Solar Power Plant Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 1,570		₩ 1,570
Book value		₩ 2,822		₩ 2,562		1,268
Bigeum Resident Photovoltaic Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29.90%		29.90%
Acquisition cost		₩ 1		₩ 1
Book value		0		0		0
Unrecognized equity interest		(460)		162
Accumulated unrecognized equity interest		₩ 0		₩ 460
Goesan Solar Park Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 1,276		₩ 1,276
Book value		₩ 2,877		₩ 2,591		1,927
Saemangeum Heemang Photovoltaic Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		35%		35%
Acquisition cost		₩ 11,022		₩ 11,022
Book value		₩ 14,420		₩ 13,010		10,238
Bitgoel Eco Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		49.25%		49.25%
Acquisition cost		₩ 7,880		₩ 7,880
Book value		₩ 12,394		₩ 8,951		4,356
Jeju Gimnyeong Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		30%		30%
Acquisition cost		₩ 714		₩ 714
Book value		₩ 246		₩ 872		911
Seoroseoro Sunny Power Plant Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		42.58%		42.58%
Acquisition cost		₩ 706		₩ 706
Book value		₩ 941		₩ 859		721
Muan Solar park Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 4,400		₩ 4,400
Book value		₩ 6,830		₩ 7,838		6,083
YuDang Solar Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 360		₩ 360
Book value		₩ 570		₩ 586		565
Anjwa Smart Farm & Solar City Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 5,651		₩ 5,651
Book value		₩ 7,665		8,662		6,784
KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)
Disclosure of associates [line items]
Key operation activities		Power generation
Location		Korea
Percentage of ownership		25.36%
Acquisition cost		₩ 3,910
Book value		7,779		₩ 4,485
Daewon Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities				Power generation
Location				Korea
Percentage of ownership				25.36%
Acquisition cost				₩ 3,910
Book value		₩ 7,779		₩ 4,485		3,877
G.GURU Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		24.65%		24.65%
Acquisition cost		₩ 493		₩ 493
Book value		₩ 167		₩ 300		403
UD4M Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[23]	R & D		R & D
Location	[23]	Korea		Korea
Percentage of ownership	[23]	12.50%		12.50%
Acquisition cost	[23]	₩ 75		₩ 75
Book value	[23]	₩ 150		₩ 161
Dongbu Highway Solar Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea	[23]	Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 190		₩ 190
Book value		₩ 380		₩ 352
Seobu Highway Solar Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 195		₩ 195
Book value		₩ 406		₩ 316
Korea Energy Data Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		29.37%		29.37%
Acquisition cost		₩ 60		₩ 60
Book value		₩ 36		₩ 62		62
Gangneung Sacheon Fuel Cell Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		41%		41%
Acquisition cost		₩ 5,695		₩ 5,695
Book value		₩ 7,870		₩ 4,277		1,878
KOSTURE Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[5]	Coal recycling business		Coal recycling business
Location	[5]	Korea		Korea
Percentage of ownership	[5]	4.42%		0.82%
Acquisition cost	[5]	₩ 7		₩ 1
Book value		₩ 8	[5]	₩ 1	[5]	0
Taebaek Gadeoksan Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		34%		34%
Acquisition cost		₩ 12,570		₩ 12,570
Book value		₩ 19,426		₩ 20,040		16,495
Chuncheon Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		45%		45%
Acquisition cost		₩ 9,540		₩ 9,540
Book value		₩ 8,900		₩ 9,155		3,372
Yeomsubong Wind Power Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation	[24]	Power generation	[25]
Location		Korea	[24]	Korea	[25]
Percentage of ownership		29%	[24]	3.81%	[25]
Acquisition cost		₩ 1,411	[24]	₩ 95	[25]
Book value		₩ 871	[24]	₩ 62	[25]	95
Yeongyang Wind Power Corporation II
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		30%		30%
Acquisition cost		₩ 7,965		₩ 7,965
Book value		₩ 10,100		₩ 7,461		7,965
Haeparang Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		25%		25%
Acquisition cost		₩ 2,241		₩ 2,241
Book value		₩ 2,104		₩ 2,188		2,241
Saemangeum Sebit Power Plant Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation	[26]	Power generation	[27]
Location		Korea	[26]	Korea	[27]
Percentage of ownership		55.14%	[26]	63.33%	[27]
Acquisition cost		₩ 21,037	[26]	₩ 13,788	[27]
Book value		37,191	[26]	23,199	[27]	6,000
Nghi Son 2 Power LLC
Disclosure of associates [line items]
Unrecognized equity interest		0		(18,940)
Accumulated unrecognized equity interest		0		0
Barakah One Company
Disclosure of associates [line items]
Unrecognized equity interest		46,746		51,137
Accumulated unrecognized equity interest		140,719		93,973
Incheon New Power Co., Ltd.
Disclosure of associates [line items]
Unrecognized equity interest		0		(163)
Accumulated unrecognized equity interest		0		0
KAPES, Inc.
Disclosure of associates [line items]
Unrecognized equity interest		(145)		(355)
Accumulated unrecognized equity interest		3,015		3,160
Chester Solar IV SpA
Disclosure of associates [line items]
Unrecognized equity interest		0		(21)
Accumulated unrecognized equity interest		₩ 0		₩ 0
Boulder Solar III, LLC
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		30%		30%
Acquisition cost		₩ 715		₩ 715
Book value		₩ 754		₩ 744
PlatformN. Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		29.58%		29.58%
Acquisition cost		₩ 105		₩ 105
Book value		0		84
Unrecognized equity interest		62		0
Accumulated unrecognized equity interest		₩ 62		₩ 0
PT. Cirebon Energi Prasarana
Disclosure of associates [line items]
Key operation activities	[21]	Power generation		Power generation
Location	[21]	Indonesia		Indonesia
Percentage of ownership	[21]	10%		10%
Acquisition cost	[21]	₩ 26,710		₩ 26,710
Book value		₩ 76,597	[21]	₩ 69,035	[21]	0
Green Radiation Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[22]	R & D		R & D
Location	[22]	Korea		Korea
Percentage of ownership	[22]	10%		10%
Acquisition cost	[22]	₩ 20		₩ 20
Book value	[22]	₩ 26		₩ 11
Future Convergence Technology Laboratory. Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		20.12%		20.12%
Acquisition cost		₩ 76		₩ 76
Book value		₩ 36		₩ 50
Eco Motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.)
Disclosure of associates [line items]
Key operation activities		R & D
Location		Korea
Percentage of ownership		20%
Acquisition cost		₩ 90
Book value		267
SC E&G. Co,. Ltd.
Disclosure of associates [line items]
Key operation activities				R & D
Location				Korea
Percentage of ownership				20%
Acquisition cost				₩ 90
Book value		₩ 267		₩ 214		0
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd..)
Disclosure of associates [line items]
Key operation activities		R & D	[18]	R & D
Location		Korea	[18]	Korea
Percentage of ownership		16.67%	[18]	20%
Acquisition cost		₩ 81	[18]	₩ 81
Book value		₩ 120	[18]	₩ 166		0
ACE
Disclosure of associates [line items]
Key operation activities		R & D		R & D
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 25		₩ 20
Book value		₩ 2		₩ 20		0
Environment and Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[22]	R & D		R & D
Location	[22]	Korea		Korea
Percentage of ownership	[22]	10.54%		10.54%
Acquisition cost	[22]	₩ 11		₩ 11
Book value		₩ 9	[22]	₩ 10	[22]	0
Santiago Solar Power SpA
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		50%		50%
Acquisition cost		₩ 13,851		₩ 13,851
Book value		₩ 11,769		₩ 13,373		0
Yanggu Floating Photovoltaic Power Plant Inc.
Disclosure of associates [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 904		₩ 904
Book value		760		903		₩ 0
International Offshore Power Transmission Holding Company Limited [Member]
Disclosure of associates [line items]
Unrecognized equity interest		(23,378)		23,378
Accumulated unrecognized equity interest		₩ 0		23,378
Power Embedded [Member]
Disclosure of associates [line items]
Key operation activities		R & D
Location		Korea
Percentage of ownership		23.33%
Acquisition cost		₩ 70
Book value		₩ 70		0
Changwon SG Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[22]	Power generation
Location	[22]	Korea
Percentage of ownership	[22]	18.78%
Acquisition cost	[22]	₩ 900
Book value		₩ 783	[22]	0
Donpyung Technology. Co., Ltd.
Disclosure of associates [line items]
Key operation activities		R & D
Location		Korea
Percentage of ownership		20%
Acquisition cost		₩ 125
Book value		₩ 254		0
HORANG ENERGY Inc.
Disclosure of associates [line items]
Key operation activities		Power generation
Location		Korea
Percentage of ownership		40%
Acquisition cost		₩ 4,240
Book value		₩ 4,149		0
Hoenggye Renewable Energy Co Ltd [Member]
Disclosure of associates [line items]
Key operation activities		Power generation
Location		Korea
Percentage of ownership		36.12%
Acquisition cost		₩ 2,375
Book value		₩ 2,375		0
Haman Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities		Power generation
Location		Korea
Percentage of ownership		35%
Acquisition cost		₩ 4,771
Book value		₩ 2,981		0
Songsan Green Energy Co., Ltd.
Disclosure of associates [line items]
Key operation activities	[28]	Power generation
Location	[28]	Korea
Percentage of ownership	[28]	60%
Acquisition cost	[28]	₩ 8,400
Book value		8,323	[28]	0
KEPCO KPS CARABAO Corp.
Disclosure of associates [line items]
Unrecognized equity interest		37		0
Accumulated unrecognized equity interest		₩ 37		₩ 0
[1]An indicator of impairment has been identified for the Company’s investment in Korea Gas Corporation (“KOGAS”) for the years ended December 31, 2022 and 2023 as management determined that the carrying amount of the investment in KOGAS at ￦2,085,296 million and ￦1,970,642 million respectively were significantly higher than its fair value. Accordingly, management has assessed the recoverable amount of the investment by estimating the Company’s share of the present value of the estimated future cash flows expected to be generated by KOGAS. The carrying amount of KOGAS as at December 31, 2022 and 2023 are supported by the recoverable amount determination and as such, no impairment has been recognized for the years ended December 31, 2022 and 2023.[2]the Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn’t started the active selling procedures as of December 31, 2023.[3]The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022.[4]The Company sold all of its shares in YTN Co., Ltd. (21.43 %) on February 15, 2024 at the price of W221,490 million as the Korea Communications Commission approved to sell the Company’s shares in entirety on February 7, 2024 (see Note 51).[5]The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors.[6]The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity.[7]After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating in the board of directors by the shareholders’ agreement. Accordingly, the entity is classified as an associate.[8]The effective percentage of ownership is more than 50%. However, by the shareholders’ agreement, the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision committee. Accordingly, the entity is classified as an associate.[9]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.[10]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.[11]The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity.[12]Although the nominal percentage of ownership is 2.35%, the effective percentage of ownership is 25.54%, considering redeemable convertible preferred stock as a liability component. The redeemable convertible preferred stock has been repaid in the current period.[13]Although the nominal percentage of ownership is 2.35%, the effective percentage of ownership is 25.54%, considering redeemable convertible preferred stock as a liability component.[14]The effective percentage of ownership changed due to the disproportionate capital reduction of financial investors during the year ended December 31, 2023.[15]The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock.[16]During the year ended December 31, 2023, the entity was reclassified from an associate to financial assets measured at fair value through other comprehensive income.[17]The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[18]Although the Company’s effective percentage of ownership is less than 20%, the Company can exercise significant influence on the entity through its contractual right to appoint one director to the entity’s board of directors.[19]The effective percentage of ownership is more than 50% but the Company does not hold control over the entity according to the shareholders’ agreement. Accordingly, the entity is classified as an associate.[20]Although the Company’s effective percentage of ownership is less than 20%, the entity has been classified as an associate as the Company has significant influence on the entity considering the fact that ordinary resolutions passed at the shareholders’ meeting require the majority decision and the Company has the right to elect the entity’s directors.[21]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation.[22]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity.[23]The effective percentage of ownership is 14.29% due to the acquisition of treasury stocks. The effective percentage of ownership is less than 20%. However, the Company exercises significant influence over the decisions related to finance and operation by virtue of right to nominate directors to the board of directors of the entity.[24]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase.[25]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation.[26]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2023. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[27]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[28]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.

Investments in Associates 2 (De

Investments in Associates 2 (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Book value
Beginning balance		₩ 5,844,464		₩ 5,232,373
Acquisition		422,109		95,037
Disposal		(2,911)		(31,398)
Dividends received		(486,012)		(599,328)
Share of profit (loss)		334,379		1,091,588
Other comprehensive income (loss)		73,198		45,268
Others		(8,338)		10,924
Ending balance		6,176,889		5,844,464
Korea Gas Corporation
Book value
Beginning balance		2,085,296		1,815,513
Acquisition		0		0
Disposal		0		0
Dividends received		0		(51,559)
Share of profit (loss)		(155,819)		305,638
Other comprehensive income (loss)		47,220		7,746
Others		(6,054)		7,958
Ending balance		1,970,643		2,085,296
Korea Electric Power Industrial Development Co., Ltd.
Book value
Beginning balance		31,078		24,617
Acquisition		0		0
Disposal		0		0
Dividends received		(2,156)		(1,872)
Share of profit (loss)		1,790		3,807
Other comprehensive income (loss)		0		0
Others		(1,212)		4,526
Ending balance		29,500		31,078
YTN Co., Ltd.
Book value
Beginning balance		55,027	[1]	51,828
Acquisition		0		0
Disposal		0		0
Dividends received		(540)		(450)
Share of profit (loss)		(1,147)		1,565
Other comprehensive income (loss)		(14)		(34)
Others		(1,023)		2,118
Ending balance		52,303	[2]	55,027	[1]
Gangwon Wind Power Co., Ltd.
Book value
Beginning balance		12,158	[3]	10,554
Acquisition		0		0
Disposal		0		0
Dividends received		(2,272)		(1,420)
Share of profit (loss)		2,115		3,024
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[3]	12,001		12,158
Hyundai Green Power Co., Ltd.
Book value
Beginning balance		119,791		121,955
Acquisition		0		0
Disposal		0		0
Dividends received		(3,555)		(4,008)
Share of profit (loss)		2,159		1,770
Other comprehensive income (loss)		0		1,345
Others		(222)		(1,271)
Ending balance		118,173		119,791
Korea Power Exchange
Book value
Beginning balance		275,126	[4]	269,728
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		4,575		772
Other comprehensive income (loss)		0		0
Others		(5,415)		4,626
Ending balance	[4]	274,286		275,126
Taebaek Wind Power Co., Ltd.
Book value
Beginning balance		14,501	[5]	6,800
Acquisition		0		7,684
Disposal		0		0
Dividends received		0		(825)
Share of profit (loss)		0		842
Other comprehensive income (loss)		0		0
Others		(14,501)		0
Ending balance		0		14,501	[5]
Taebaek Guinemi Wind Power Co., Ltd.
Book value
Beginning balance		13,049	[5]	3,357
Acquisition		0		9,217
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		481		475
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		13,530	[6]	13,049	[5]
Pyeongchang Wind Power Co., Ltd.
Book value
Beginning balance		0		5,411
Acquisition				5,454
Disposal				0
Dividends received				(100)
Share of profit (loss)				3,695
Other comprehensive income (loss)				0
Others				(14,460)
Ending balance				0
Daeryun Power Co., Ltd.
Book value
Beginning balance		26,727	[3]	25,426
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		143		429
Other comprehensive income (loss)		(12)		1
Others		(24)		871
Ending balance	[3]	26,834		26,727
Changjuk Wind Power Co., Ltd.
Book value
Beginning balance		0		8,355
Acquisition				11,862
Disposal				0
Dividends received				(1,350)
Share of profit (loss)				817
Other comprehensive income (loss)				0
Others				(19,684)
Ending balance				0
KNH Solar Co., Ltd.
Book value
Beginning balance		2,883		2,278
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		311		606
Other comprehensive income (loss)		0		(1)
Others		0		0
Ending balance		3,194		2,883
SPC Power Corporation
Book value
Beginning balance		70,868	[7]	65,046
Acquisition		0		0
Disposal		0		0
Dividends received		(2,669)		(2,694)
Share of profit (loss)		9,667		1,188
Other comprehensive income (loss)		1,065		7,330
Others		0		(2)
Ending balance		78,931	[8]	70,868	[7]
Gemeng International Energy Co., Ltd.
Book value
Beginning balance		578,821		595,218
Acquisition		102,854		0
Disposal		0		0
Dividends received		(12,527)		0
Share of profit (loss)		41,280		(233)
Other comprehensive income (loss)		565		(16,164)
Others		(5,181)		0
Ending balance		705,812		578,821
PT. Cirebon Electric Power
Book value
Beginning balance		135,114		121,969
Acquisition		0		0
Disposal		0		0
Dividends received		(10,770)		(10,659)
Share of profit (loss)		7,519		14,776
Other comprehensive income (loss)		0		704
Others		2,396		8,324
Ending balance		134,259		135,114
KNOC Nigerian East Oil Co., Ltd.
Book value
Beginning balance		0	[9]	0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(7)		(11)
Other comprehensive income (loss)		(213)		(787)
Others		220		798
Ending balance	[9]	0		0
KNOC Nigerian West Oil Co., Ltd.
Book value
Beginning balance		0	[9]	0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(7)		(10)
Other comprehensive income (loss)		(196)		(724)
Others		203		734
Ending balance	[9]	0		0
PT Wampu Electric Power
Book value
Beginning balance		37,743		35,077
Acquisition		0		0
Disposal		0		0
Dividends received		(3,850)		(5,551)
Share of profit (loss)		(268)		5,848
Other comprehensive income (loss)		224		54
Others		706		2,315
Ending balance		34,555		37,743
PT. Bayan Resources TBK
Book value
Beginning balance		684,719		661,289
Acquisition		0		0
Disposal		0		0
Dividends received		(344,360)		(515,139)
Share of profit (loss)		252,406		531,528
Other comprehensive income (loss)		26,500		7,041
Others		(58)		0
Ending balance		619,207		684,719
S-Power Co., Ltd.
Book value
Beginning balance		141,128		122,786
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		21,637		18,342
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		162,765		141,128
Pioneer Gas Power Limited
Book value
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0
Eurasia Energy Holdings
Book value
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0
Xe-Pian Xe-Namnoy Power Co., Ltd.
Book value
Beginning balance		115,584		92,441
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(848)		15,582
Other comprehensive income (loss)		1,642		7,561
Others		0		0
Ending balance		116,378		115,584
PT. Mutiara Jawa
Book value
Beginning balance		3,597		2,569
Acquisition		0		0
Disposal		0		0
Dividends received		(459)		0
Share of profit (loss)		1,936		1,197
Other comprehensive income (loss)		94		(169)
Others		0		0
Ending balance		5,168		3,597
Samcheok Eco Materials Co., Ltd.
Book value
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0
Noeul Green Energy Co., Ltd.
Book value
Beginning balance		0		3,808
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		(3,824)
Other comprehensive income (loss)		0		0
Others		0		16
Ending balance		0		0
Goseong Green Power Co., Ltd.
Book value
Beginning balance		288,893		260,858
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(1,240)		27,992
Other comprehensive income (loss)		0		0
Others		(29)		43
Ending balance		287,624		288,893
Gangneung Eco Power Co., Ltd.
Book value
Beginning balance		0	[3]	2,288
Acquisition		258,100		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(3,171)		(2,288)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		254,929	[10]	0	[3]
Shin Pyeongtaek Power Co., Ltd.
Book value
Beginning balance		133,823		93,074
Acquisition		0		0
Disposal		0		0
Dividends received		(70,040)		0
Share of profit (loss)		81,258		40,713
Other comprehensive income (loss)		0		0
Others		(15)		36
Ending balance		145,026		133,823
Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Book value
Beginning balance		278		223
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		16		55
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		294		278
Dongducheon Dream Power Co., Ltd.
Book value
Beginning balance		89,300	[11]	74,198
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(2,568)		15,086
Other comprehensive income (loss)		0		0
Others		471		16
Ending balance	[11]	87,203		89,300
Jinbhuvish Power Generation Pvt. Ltd.
Book value
Beginning balance		0	[3]	0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[3]	0		0
Daejung Offshore Wind Power Co., Ltd.
Book value
Beginning balance		1,555		1,704
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(72)		(149)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		1,483		1,555
GS Donghae Electric Power Co., Ltd.
Book value
Beginning balance		260,145		243,772
Acquisition		0		0
Disposal		0		0
Dividends received		(21,846)		0
Share of profit (loss)		21,240		15,717
Other comprehensive income (loss)		0		0
Others		(454)		656
Ending balance		259,085		260,145
Daegu Photovoltaic Co., Ltd.
Book value
Beginning balance		2,849		2,342
Acquisition		0		0
Disposal		0		0
Dividends received		(408)		(268)
Share of profit (loss)		363		775
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,804		2,849
Busan Green Energy Co., Ltd.
Book value
Beginning balance		4,395		5,032
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(1,137)		(667)
Other comprehensive income (loss)		0		0
Others		1		30
Ending balance		3,259		4,395
Gunsan Bio Energy Co., Ltd.
Book value
Beginning balance		0	[3]	0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0	[3]
Korea Electric Vehicle Charging Service
Book value
Beginning balance		0		1,250
Acquisition				0
Disposal				(1,293)
Dividends received				0
Share of profit (loss)				43
Other comprehensive income (loss)				0
Others				0
Ending balance				0
Hansuwon KNP Co., Ltd. (formerly, Korea Nuclear Partners Co., Ltd.)
Book value
Beginning balance		280		219
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		187		61
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		467		280
Korea Electric Power Corporation Fund
Book value
Beginning balance		28,842	[12]	47,983
Acquisition		0		0
Disposal		(2,266)		(25,297)
Dividends received		0		0
Share of profit (loss)		(2,865)		7,966
Other comprehensive income (loss)		(290)		(1,810)
Others		0		0
Ending balance	[12]	23,421		28,842
Energy Infra Asset Management Co., Ltd.
Book value
Beginning balance		1,184	[3]	1,066
Acquisition		0		0
Disposal		0		0
Dividends received		(89)		0
Share of profit (loss)		118		118
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		1,213	[13]	1,184	[3]
Daegu clean Energy Co., Ltd.
Book value
Beginning balance		12		12
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		(12)		0
Ending balance		0		12
YaksuESS Co., Ltd.
Book value
Beginning balance		486		716
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(201)		(230)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		285		486
Nepal Water & Energy Development Company Private Limited
Book value
Beginning balance		69,940	[14]	66,333
Acquisition		40,103		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(325)		(923)
Other comprehensive income (loss)		855		4,530
Others		0		0
Ending balance	[14]	110,573	[10]	69,940
Gwangyang Green Energy Co., Ltd.
Book value
Beginning balance		25,044		25,466
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(406)		(422)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		24,638		25,044
PND Solar Co., Ltd.
Book value
Beginning balance		1,403		1,229
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		107		174
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		1,510		1,403
Hyundai Eco Energy Co., Ltd.
Book value
Beginning balance		7,631	[3]	5,572
Acquisition		0		0
Disposal		0		0
Dividends received		(874)		0
Share of profit (loss)		1,198		2,058
Other comprehensive income (loss)		(8)		1
Others		0		0
Ending balance	[3]	7,947		7,631
YeongGwang Yaksu Wind Electric Co., Ltd.
Book value
Beginning balance		156	[3]	233
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(23)		143
Other comprehensive income (loss)		0		0
Others		0		(220)
Ending balance	[3]	133		156
Green Energy Electricity Generation Co., Ltd.
Book value
Beginning balance		1,571		1,713
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(1,563)		(142)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		8		1,571
Korea Energy Solutions Co., Ltd.
Book value
Beginning balance		93		123
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		77		(30)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		170		93
ITR Co., Ltd.
Book value
Beginning balance		0		32
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(33)		(32)
Other comprehensive income (loss)		0		0
Others		33		0
Ending balance		0	[15]	0
STN Co., Ltd. (formerly, Structure test network Co., Ltd.)
Book value
Beginning balance		366		306
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		25		60
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		391		366
Namjeongsusang Solar Power Operation Co., Ltd.
Book value
Beginning balance		373	[16]	361
Acquisition		0		0
Disposal		(217)		0
Dividends received		0		0
Share of profit (loss)		(156)		12
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		373	[16]
Indeck Niles Development, LLC
Book value
Beginning balance		302,038		246,273
Acquisition		0		0
Disposal		0		(4,289)
Dividends received		0		0
Share of profit (loss)		32,067		21,975
Other comprehensive income (loss)		(3,623)		21,840
Others		4,919		16,239
Ending balance		335,401		302,038
Indeck Niles Asset Management, LLC
Book value
Beginning balance		94		111
Acquisition		0		0
Disposal		0		0
Dividends received		(337)		(497)
Share of profit (loss)		334		472
Other comprehensive income (loss)		0		0
Others		2		8
Ending balance		93		94
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1
Book value
Beginning balance		6,932		7,138
Acquisition		0		0
Disposal		(428)		(202)
Dividends received		(373)		(392)
Share of profit (loss)		366		389
Other comprehensive income (loss)		(1)		(1)
Others		0		0
Ending balance		6,496		6,932
Suwon New Power Co., Ltd.
Book value
Beginning balance		919		1,035
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		103		(116)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		1,022		919
KPGE Inc.
Book value
Beginning balance		0		309
Acquisition				0
Disposal				(317)
Dividends received				0
Share of profit (loss)				8
Other comprehensive income (loss)				0
Others				0
Ending balance				0
Gwangbaek Solar Power Investment Co., Ltd.
Book value
Beginning balance		5,133		4,806
Acquisition		0		0
Disposal		0		0
Dividends received		(644)		0
Share of profit (loss)		666		327
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		5,155		5,133
Go deok Clean Energy Co., Ltd
Book value
Beginning balance		4,420		4,302
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		303		118
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		4,723		4,420
SureDataLab Co., Ltd.
Book value
Beginning balance		177		128
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(63)		49
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		114		177
SEP Co., Ltd.
Book value
Beginning balance		0		7
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		(7)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0
Hankook Electric Power Information Co., Ltd.
Book value
Beginning balance		220	[17]	161
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(6)		121
Other comprehensive income (loss)		0		0
Others		0		(62)
Ending balance	[17]	214		220
Tronix Co., Ltd.
Book value
Beginning balance		66	[17]	109
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		154		(37)
Other comprehensive income (loss)		0		0
Others		0		(6)
Ending balance	[17]	220		66
O2&B Global Co., Ltd.
Book value
Beginning balance		36		35
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(15)		1
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		21		36
Muan Sunshine Solar Power Plant Co., Ltd.
Book value
Beginning balance		2,562		1,268
Acquisition		0		0
Disposal		0		0
Dividends received		(340)		0
Share of profit (loss)		600		1,294
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,822		2,562
Bigeum Resident Photovoltaic Power Co., Ltd.
Book value
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(414)		0
Other comprehensive income (loss)		414		0
Others		0		0
Ending balance		0		0
Goesan Solar Park Co., Ltd.
Book value
Beginning balance		2,591		1,927
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		286		664
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,877		2,591
Saemangeum Heemang Photovoltaic Co., Ltd.
Book value
Beginning balance		13,010		10,238
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		1,410		2,772
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		14,420		13,010
Bitgoel Eco Energy Co., Ltd.
Book value
Beginning balance		8,951		4,356
Acquisition		0		3,240
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		3,443		1,355
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		12,394		8,951
Jeju Gimnyeong Wind Power Co., Ltd.
Book value
Beginning balance		872		911
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(626)		(39)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		246		872
Seoroseoro Sunny Power Plant Co., Ltd.
Book value
Beginning balance		859		721
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		82		138
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		941		859
Muan Solar park Co., Ltd.
Book value
Beginning balance		7,838		6,083
Acquisition		0		0
Disposal		0		0
Dividends received		(2,680)		(600)
Share of profit (loss)		1,672		2,377
Other comprehensive income (loss)		0		(22)
Others		0		0
Ending balance		6,830		7,838
YuDang Solar Co., Ltd.
Book value
Beginning balance		586		565
Acquisition		0		0
Disposal		0		0
Dividends received		(100)		(160)
Share of profit (loss)		84		181
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		570		586
Anjwa Smart Farm & Solar City Co., Ltd.
Book value
Beginning balance		8,662		6,784
Acquisition		0		0
Disposal		0		0
Dividends received		(1,400)		0
Share of profit (loss)		403		1,878
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		7,665		8,662
KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)
Book value
Beginning balance		4,485
Acquisition		0
Disposal		0
Dividends received		0
Share of profit (loss)		3,294
Other comprehensive income (loss)		0
Others		0
Ending balance		7,779		4,485
Daewon Green Energy Co., Ltd.
Book value
Beginning balance		4,485		3,877
Acquisition				0
Disposal				0
Dividends received				0
Share of profit (loss)				608
Other comprehensive income (loss)				0
Others				0
Ending balance		7,779		4,485
G.GURU Co., Ltd.
Book value
Beginning balance		300		403
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(133)		(103)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		167		300
UD4M Co., Ltd.
Book value
Beginning balance		161		144
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(11)		17
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		150		161
Dongbu Highway Solar Co., Ltd.
Book value
Beginning balance		352		265
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		28		87
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		380		352
Seobu Highway Solar Co., Ltd.
Book value
Beginning balance		316		289
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		90		27
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		406		316
Korea Energy Data Co., Ltd.
Book value
Beginning balance		62		62
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(26)		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		36		62
Gangneung Sacheon Fuel Cell Co., Ltd.
Book value
Beginning balance		4,277		1,878
Acquisition		0		3,745
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		3,593		(1,310)
Other comprehensive income (loss)		0		(36)
Others		0		0
Ending balance		7,870		4,277
KOSTURE Co., Ltd.
Book value
Beginning balance		1	[3]	0
Acquisition		6		1
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		1		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[3]	8		1
Digital Innovation Growth Fund
Book value
Beginning balance		0		9,890
Acquisition				0
Disposal				0
Dividends received				0
Share of profit (loss)				(204)
Other comprehensive income (loss)				0
Others				(9,686)
Ending balance				0
Taebaek Gadeoksan Wind Power Co., Ltd.
Book value
Beginning balance		20,040		16,495
Acquisition		0		0
Disposal		0		0
Dividends received		(3,723)		(1,784)
Share of profit (loss)		3,109		5,644
Other comprehensive income (loss)		0		0
Others		0		(315)
Ending balance		19,426		20,040
Chuncheon Green Energy Co., Ltd.
Book value
Beginning balance		9,155		3,372
Acquisition		0		6,140
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(204)		(357)
Other comprehensive income (loss)		(51)		0
Others		0		0
Ending balance		8,900		9,155
Yeomsubong Wind Power Co., Ltd.
Book value
Beginning balance		62	[18]	95
Acquisition		1,316		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(507)		(40)
Other comprehensive income (loss)		0		0
Others		0		7
Ending balance		871	[19]	62	[18]
Yeongyang Wind Power Corporation II
Book value
Beginning balance		7,461		7,965
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		2,639		(504)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		10,100		7,461
Haeparang Energy Co., Ltd.
Book value
Beginning balance		2,188		2,241
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(84)		(53)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,104		2,188
Saemangeum Sebit Power Plant Co., Ltd.
Book value
Beginning balance		23,199	[20]	6,000
Acquisition		7,249		7,788
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(709)		4,855
Other comprehensive income (loss)		0		0
Others		7,452		4,556
Ending balance		37,191	[21]	23,199	[20]
Boulder Solar III, LLC
Book value
Beginning balance		744		0
Acquisition		0		715
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		10		29
Ending balance		754		744
PlatformN. Co., Ltd
Book value
Beginning balance		84		0
Acquisition		0		105
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(84)		(21)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		84
PT. Cirebon Energi Prasarana
Book value
Beginning balance		69,035	[16]	0
Acquisition		0		24,052
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		7,328		35,315
Other comprehensive income (loss)		(891)		6,963
Others		1,125		2,705
Ending balance	[16]	76,597		69,035
Green Radiation Co., Ltd
Book value
Beginning balance		11		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		15		(9)
Other comprehensive income (loss)		0		0
Others		0		20
Ending balance		26		11
Future Convergence Technology Laboratory. Co., Ltd
Book value
Beginning balance		50		0
Acquisition		0		76
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(14)		(26)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		36		50
Eco motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.)
Book value
Beginning balance		214		0
Acquisition		0		90
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		53		124
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		267		214
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.)
Book value
Beginning balance		166		0
Acquisition		0		81
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(72)		85
Other comprehensive income (loss)		0		0
Others		26		0
Ending balance		120	[13]	166
ACE
Book value
Beginning balance		20		0
Acquisition		0		20
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(18)		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2		20
Environment and Energy Co., Ltd
Book value
Beginning balance		10	[17]	0
Acquisition		0		11
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(1)		(1)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[17]	9		10
Santiago Solar Power SpA
Book value
Beginning balance		13,373		0
Acquisition		0		13,853
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(1,522)		(379)
Other comprehensive income (loss)		(82)		(100)
Others		0		(1)
Ending balance		11,769		13,373
Yanggu Floating Photovoltaic Power Plant Inc.
Book value
Beginning balance		903		0
Acquisition		0		903
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(143)		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		760		903
Power Embedded [Member]
Book value
Beginning balance		0
Acquisition		70
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		0
Ending balance		70		0
Changwon SG Energy Co Ltd [Member]
Book value
Beginning balance		0
Acquisition		900
Disposal		0
Dividends received		0
Share of profit (loss)		(117)
Other comprehensive income (loss)		0
Others		0
Ending balance		783	[17]	0
Donpyung Technology Co Ltd [Member]
Book value
Beginning balance		0
Acquisition		125
Disposal		0
Dividends received		0
Share of profit (loss)		154
Other comprehensive income (loss)		0
Others		(25)
Ending balance		254		0
HORANG ENERGY Inc [Member]
Book value
Beginning balance		0
Acquisition		4,240
Disposal		0
Dividends received		0
Share of profit (loss)		(91)
Other comprehensive income (loss)		0
Others		0
Ending balance		4,149		0
Hoenggye Renewable Energy Co Ltd [Member]
Book value
Beginning balance		0
Acquisition		2,375
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		0
Ending balance		2,375		0
Haman Green Energy Co Ltd [Member]
Book value
Beginning balance		0
Acquisition		4,771
Disposal		0
Dividends received		0
Share of profit (loss)		(1,790)
Other comprehensive income (loss)		0
Others		0
Ending balance		2,981		0
Songsan Green Energy Co Ltd [Member]
Book value
Beginning balance		0
Acquisition		0
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		8,323
Ending balance		₩ 8,323	[22]	₩ 0
[1]The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022.[2]the Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn’t started the active selling procedures as of December 31, 2023.[3]The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors.[4]The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity.[5]After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating in the board of directors by the shareholders’ agreement. Accordingly, the entity is classified as an associate.[6]The effective percentage of ownership is more than 50%. However, by the shareholders’ agreement, the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision committee. Accordingly, the entity is classified as an associate.[7]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.[8]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.[9]The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity.[10]The effective percentage of ownership changed due to the disproportionate capital reduction of financial investors during the year ended December 31, 2023.[11]The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock.[12]The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[13]Although the Company’s effective percentage of ownership is less than 20%, the Company can exercise significant influence on the entity through its contractual right to appoint one director to the entity’s board of directors.[14]The effective percentage of ownership is more than 50% but the Company does not hold control over the entity according to the shareholders’ agreement. Accordingly, the entity is classified as an associate.[15]Although the Company’s effective percentage of ownership is less than 20%, the entity has been classified as an associate as the Company has significant influence on the entity considering the fact that ordinary resolutions passed at the shareholders’ meeting require the majority decision and the Company has the right to elect the entity’s directors.[16]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation.[17]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity.[18]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation.[19]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase.[20]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[21]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2023. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[22]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.

Investments in Associates 3 (De

Investments in Associates 3 (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of associates [line items]
Total assets	₩ 239,714,965	₩ 234,804,994
Total liabilities	202,450,215	192,804,738
Sales	87,476,410	70,546,024	₩ 60,012,375
Profit (loss) for the period	(4,716,144)	(24,429,108)	₩ (5,215,581)
Korea Gas Corporation
Disclosure of associates [line items]
Total assets	57,254,666	62,424,983
Total liabilities	47,428,628	52,014,243
Sales	44,555,995	51,724,287
Profit (loss) for the period	(747,428)	1,497,008
Korea Electric Power Industrial Development Co., Ltd.
Disclosure of associates [line items]
Total assets	174,788	148,112
Total liabilities	73,065	40,946
Sales	354,850	336,333
Profit (loss) for the period	21,170	15,434
YTN Co., Ltd.
Disclosure of associates [line items]
Total assets	352,188	364,115
Total liabilities	108,108	107,324
Sales	130,450	152,187
Profit (loss) for the period	(3,616)	7,250
Gangwon Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets	83,062	86,758
Total liabilities	3,380	6,029
Sales	32,525	40,130
Profit (loss) for the period	14,098	20,163
Hyundai Green Power Co., Ltd.
Disclosure of associates [line items]
Total assets	738,107	773,998
Total liabilities	330,616	360,926
Sales	107,367	105,374
Profit (loss) for the period	7,446	5,010
Korea Power Exchange
Disclosure of associates [line items]
Total assets	366,092	311,691
Total liabilities	91,806	36,564
Sales	119,182	118,501
Profit (loss) for the period	4,443	1,036
Taebaek Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets		27,562
Total liabilities		3,394
Sales		7,565
Profit (loss) for the period		551
Taebaek Guinemi Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets	42,243	44,036
Total liabilities	26,200	28,709
Sales	5,529	6,793
Profit (loss) for the period	716	1,906
Daeryun Power Co., Ltd.
Disclosure of associates [line items]
Total assets	1,120,453	1,201,510
Total liabilities	716,752	799,370
Sales	451,527	472,211
Profit (loss) for the period	4,043	4,999
KNH Solar Co., Ltd.
Disclosure of associates [line items]
Total assets	12,142	13,584
Total liabilities	314	2,905
Sales	3,535	4,348
Profit (loss) for the period	1,394	2,173
SPC Power Corporation
Disclosure of associates [line items]
Total assets	287,249	254,951
Total liabilities	28,485	26,417
Sales	106,926	80,630
Profit (loss) for the period	27,946	25,614
Gemeng International Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	7,507,274	7,796,180
Total liabilities	5,189,729	5,460,183
Sales	2,963,614	3,183,398
Profit (loss) for the period	33,580	11,637
PT. Cirebon Electric Power
Disclosure of associates [line items]
Total assets	665,365	691,311
Total liabilities	177,150	199,987
Sales	265,054	287,261
Profit (loss) for the period	27,341	53,730
KNOC Nigerian East Oil Co., Ltd.
Disclosure of associates [line items]
Total assets	27,029	26,491
Total liabilities	112,017	109,974
Sales	0	0
Profit (loss) for the period	(50)	(72)
KNOC Nigerian West Oil Co., Ltd.
Disclosure of associates [line items]
Total assets	29,157	28,537
Total liabilities	107,300	105,292
Sales	0	0
Profit (loss) for the period	(50)	(72)
PT Wampu Electric Power
Disclosure of associates [line items]
Total assets	206,943	209,815
Total liabilities	131,823	127,764
Sales	20,155	21,773
Profit (loss) for the period	(582)	12,713
PT. Bayan Resources TBK
Disclosure of associates [line items]
Total assets	4,447,335	4,994,538
Total liabilities	2,018,870	2,518,129
Sales	4,675,174	6,076,844
Profit (loss) for the period	1,670,522	3,042,123
S-Power Co., Ltd.
Disclosure of associates [line items]
Total assets	762,398	937,067
Total liabilities	427,807	646,411
Sales	1,012,050	1,091,425
Profit (loss) for the period	44,730	37,104
Pioneer Gas Power Limited
Disclosure of associates [line items]
Total assets	274,693	271,340
Total liabilities	532,005	477,127
Sales	551	0
Profit (loss) for the period	(49,745)	(46,290)
Eurasia Energy Holdings
Disclosure of associates [line items]
Total assets		648
Total liabilities		1,156
Sales		0
Profit (loss) for the period		0
Xe-Pian Xe-Namnoy Power Co., Ltd.
Disclosure of associates [line items]
Total assets	1,370,110	1,371,292
Total liabilities	900,713	904,907
Sales	171,978	174,693
Profit (loss) for the period	(5,674)	61,020
PT. Mutiara Jawa
Disclosure of associates [line items]
Total assets	27,296	26,024
Total liabilities	9,474	13,622
Sales	16,160	15,421
Profit (loss) for the period	7,999	4,912
Samcheok Eco Materials Co., Ltd.
Disclosure of associates [line items]
Total assets	22,544	24,952
Total liabilities	39,895	1,609
Sales	8,028	11,907
Profit (loss) for the period	(1,776)	(1,127)
Noeul Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	89,861	82,611
Total liabilities	107,834	101,472
Sales	24,017	23,493
Profit (loss) for the period	920	(31,970)
Goseong Green Power Co., Ltd.
Disclosure of associates [line items]
Total assets	5,374,233	5,518,258
Total liabilities	4,372,531	4,516,607
Sales	1,580,545	1,999,825
Profit (loss) for the period	152	26,981
Gangneung Eco Power Co., Ltd.
Disclosure of associates [line items]
Total assets	5,381,984	4,907,872
Total liabilities	4,665,083	4,900,408
Sales	1,419,436	435,755
Profit (loss) for the period	(7,388)	(142,387)
Shin Pyeongtaek Power Co., Ltd.
Disclosure of associates [line items]
Total assets	1,222,968	1,203,406
Total liabilities	832,633	839,568
Sales	1,040,219	957,062
Profit (loss) for the period	201,635	100,554
Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Disclosure of associates [line items]
Total assets	1,618	1,788
Total liabilities	573	802
Sales	575	558
Profit (loss) for the period	82	200
Dongducheon Dream Power Co., Ltd.
Disclosure of associates [line items]
Total assets	1,337,529	1,521,089
Total liabilities	1,042,681	1,219,018
Sales	1,744,247	2,240,175
Profit (loss) for the period	(8,608)	43,072
Jinbhuvish Power Generation Pvt. Ltd.
Disclosure of associates [line items]
Total assets	61,227	60,477
Total liabilities	12,644	12,489
Sales	0	0
Profit (loss) for the period	0	0
Daejung Offshore Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets	5,277	5,350
Total liabilities	2,094	2,013
Sales	0	0
Profit (loss) for the period	(145)	(228)
GS Donghae Electric Power Co., Ltd.
Disclosure of associates [line items]
Total assets	1,932,098	2,130,287
Total liabilities	1,170,085	1,365,156
Sales	876,826	1,053,112
Profit (loss) for the period	62,471	46,226
Daegu Photovoltaic Co., Ltd.
Disclosure of associates [line items]
Total assets	14,140	13,254
Total liabilities	4,471	3,431
Sales	4,225	4,755
Profit (loss) for the period	1,772	2,914
Busan Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	160,299	168,588
Total liabilities	149,060	153,432
Sales	69,108	72,290
Profit (loss) for the period	(3,920)	(7,409)
Gunsan Bio Energy Co., Ltd.
Disclosure of associates [line items]
Total assets		8,397
Total liabilities		29,524
Sales		0
Profit (loss) for the period		(649)
Hansuwon KNP Co., Ltd. (formerly, Korea Nuclear Partners Co., Ltd.)
Disclosure of associates [line items]
Total assets	3,063	1,887
Total liabilities	899	368
Sales	7,618	2,149
Profit (loss) for the period	645	210
Korea Electric Power Corporation Fund
Disclosure of associates [line items]
Total assets	23,981	29,530
Total liabilities	108	130
Sales	332	8,034
Profit (loss) for the period	(2,921)	7,854
Energy Infra Asset Management Co., Ltd.
Disclosure of associates [line items]
Total assets	13,628	12,874
Total liabilities	1,371	918
Sales	5,130	4,954
Profit (loss) for the period	1,254	1,354
Daegu clean Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	368	368
Total liabilities	324	324
Sales	0	0
Profit (loss) for the period	(1)	(1)
Yaksu ESS Co., Ltd.
Disclosure of associates [line items]
Total assets	5,697	5,984
Total liabilities	4,717	4,314
Sales	508	851
Profit (loss) for the period	(691)	(146)
Nepal Water & Energy Development Company Private Limited
Disclosure of associates [line items]
Total assets	327,057	241,061
Total liabilities	167,792	141,199
Sales	82,720	70,923
Profit (loss) for the period	(3,186)	(1,364)
Gwangyang Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	370,778	170,390
Total liabilities	247,675	45,260
Sales	0	0
Profit (loss) for the period	(2,034)	(1,923)
PND Solar Co., Ltd.
Disclosure of associates [line items]
Total assets	34,804	36,174
Total liabilities	30,127	31,868
Sales	5,413	5,940
Profit (loss) for the period	373	217
Hyundai Eco Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	169,180	181,566
Total liabilities	128,481	142,533
Sales	26,266	29,209
Profit (loss) for the period	7,206	10,270
YeongGwang Yaksu Wind Electric Co., Ltd.
Disclosure of associates [line items]
Total assets	38,720	40,712
Total liabilities	38,173	39,924
Sales	5,593	6,628
Profit (loss) for the period	(241)	1,480
Green Energy Electricity Generation Co., Ltd.
Disclosure of associates [line items]
Total assets	69,667	75,033
Total liabilities	72,325	72,300
Sales	948	1,404
Profit (loss) for the period	(5,392)	(488)
Korea Energy Solutions Co., Ltd.
Disclosure of associates [line items]
Total assets	1,151	843
Total liabilities	303	377
Sales	643	437
Profit (loss) for the period	87	(185)
ITR Co., Ltd.
Disclosure of associates [line items]
Total assets	480	446
Total liabilities	490	472
Sales	144	188
Profit (loss) for the period	(234)	(190)
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.)
Disclosure of associates [line items]
Total assets	1,818	1,948
Total liabilities	127	383
Sales	771	732
Profit (loss) for the period	178	202
Namjeongsusang Solar Power Operation Co., Ltd.
Disclosure of associates [line items]
Total assets		55,616
Total liabilities		53,261
Sales		7,724
Profit (loss) for the period		83
Indeck Niles Development, LLC
Disclosure of associates [line items]
Total assets	1,157,838	1,178,303
Total liabilities	675,638	762,139
Sales	318,392	302,041
Profit (loss) for the period	64,813	(22,541)
Indeck Niles Asset Management, LLC
Disclosure of associates [line items]
Total assets	307	299
Total liabilities	29	16
Sales	1,081	1,863
Profit (loss) for the period	1,001	1,136
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1
Disclosure of associates [line items]
Total assets	13,444	14,356
Total liabilities	186	210
Sales	820	826
Profit (loss) for the period	747	796
Suwon New Power Co., Ltd.
Disclosure of associates [line items]
Total assets	3,448	2,142
Total liabilities	1,130	164
Sales	2,318	0
Profit (loss) for the period	341	11
Gwangbaek Solar Power Investment Co., Ltd.
Disclosure of associates [line items]
Total assets	287,838	307,864
Total liabilities	276,840	296,915
Sales	11,267	10,270
Profit (loss) for the period	1,513	743
Go deok Clean Energy Co., Ltd
Disclosure of associates [line items]
Total assets	139,352	71,431
Total liabilities	127,545	60,382
Sales	22,671	0
Profit (loss) for the period	2,426	(1,101)
SureDataLab Co., Ltd.
Disclosure of associates [line items]
Total assets	890	879
Total liabilities	416	140
Sales	548	938
Profit (loss) for the period	(263)	203
SEP Co., Ltd.
Disclosure of associates [line items]
Total assets	45	38
Total liabilities	117	103
Sales	0	0
Profit (loss) for the period	(7)	(98)
Hankook Electric Power Information Co., Ltd.
Disclosure of associates [line items]
Total assets	2,270	2,334
Total liabilities	974	997
Sales	1,672	1,797
Profit (loss) for the period	223	392
Tronix Co., Ltd.
Disclosure of associates [line items]
Total assets	4,564	2,880
Total liabilities	2,807	2,354
Sales	2,718	1,938
Profit (loss) for the period	578	(226)
O2&B Global Co., Ltd.
Disclosure of associates [line items]
Total assets	369	419
Total liabilities	264	238
Sales	242	220
Profit (loss) for the period	(73)	5
Muan Sunshine Solar Power Plant Co., Ltd.
Disclosure of associates [line items]
Total assets	136,382	142,911
Total liabilities	124,745	132,573
Sales	16,360	19,591
Profit (loss) for the period	2,999	6,467
Bigeum Resident Photovoltaic Power Co., Ltd.
Disclosure of associates [line items]
Total assets	303,462	107,690
Total liabilities	309,185	109,229
Sales	0	0
Profit (loss) for the period	(3,031)	(537)
Goesan Solar Park Co., Ltd.
Disclosure of associates [line items]
Total assets	50,659	52,235
Total liabilities	40,738	43,299
Sales	6,530	7,642
Profit (loss) for the period	985	2,292
Saemangeum Heemang Photovoltaic Co., Ltd.
Disclosure of associates [line items]
Total assets	152,496	160,695
Total liabilities	113,407	125,635
Sales	23,448	29,543
Profit (loss) for the period	4,063	6,481
Bitgoel Eco Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	85,571	85,236
Total liabilities	60,302	66,987
Sales	29,907	10,054
Profit (loss) for the period	7,019	3,229
Jeju Gimnyeong Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets	56,906	63,471
Total liabilities	56,087	60,564
Sales	9,261	12,231
Profit (loss) for the period	(2,088)	(130)
Seoroseoro Sunny Power Plant Co., Ltd.
Disclosure of associates [line items]
Total assets	6,813	7,015
Total liabilities	4,650	5,045
Sales	1,039	1,157
Profit (loss) for the period	193	247
Muan Solar park Co., Ltd.
Disclosure of associates [line items]
Total assets	204,168	225,894
Total liabilities	171,642	188,329
Sales	31,532	36,081
Profit (loss) for the period	8,648	11,339
YuDang Solar Co., Ltd.
Disclosure of associates [line items]
Total assets	20,566	22,073
Total liabilities	17,717	19,144
Sales	3,483	3,997
Profit (loss) for the period	420	957
Anjwa Smart Farm & Solar City Co., Ltd.
Disclosure of associates [line items]
Total assets	258,076	278,806
Total liabilities	223,831	239,581
Sales	37,742	42,477
Profit (loss) for the period	3,119	9,672
Daewon Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	143,157	141,974
Total liabilities	112,651	124,460
Sales	58,423	45,095
Profit (loss) for the period	13,407	4,037
G.GURU Co., Ltd.
Disclosure of associates [line items]
Total assets	818	1,228
Total liabilities	142	12
Sales	162	478
Profit (loss) for the period	(540)	(423)
UD4M Co., Ltd.
Disclosure of associates [line items]
Total assets	1,242	1,322
Total liabilities	194	197
Sales	1,066	1,109
Profit (loss) for the period	(59)	59
Dongbu Highway Solar Co., Ltd.
Disclosure of associates [line items]
Total assets	16,563	17,935
Total liabilities	14,913	16,426
Sales	2,580	2,901
Profit (loss) for the period	140	439
Seobu Highway Solar Co., Ltd.
Disclosure of associates [line items]
Total assets	16,739	18,236
Total liabilities	14,707	16,655
Sales	2,646	3,052
Profit (loss) for the period	451	138
Korea Energy Data Co., Ltd.
Disclosure of associates [line items]
Total assets	313	339
Total liabilities	191	128
Sales	348	308
Profit (loss) for the period	(87)	5
Gangneung Sacheon Fuel Cell Co., Ltd.
Disclosure of associates [line items]
Total assets	138,761	108,688
Total liabilities	119,779	98,470
Sales	23,523	0
Profit (loss) for the period	9,191	(2,720)
KOSTURE Co., Ltd.
Disclosure of associates [line items]
Total assets	196	180
Total liabilities	22	24
Sales	208	293
Profit (loss) for the period	16	32
Taebaek Gadeoksan Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets	196,810	197,944
Total liabilities	139,675	139,004
Sales	35,000	31,534
Profit (loss) for the period	13,138	19,406
Chuncheon Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	217,335	159,151
Total liabilities	197,676	138,925
Sales	6,052	0
Profit (loss) for the period	(497)	(858)
Yeomsubong Wind Power Co., Ltd.
Disclosure of associates [line items]
Total assets	32,742	4,369
Total liabilities	30,586	2,829
Sales	0	0
Profit (loss) for the period	(1,753)	(859)
Yeongyang Wind Power Corporation II
Disclosure of associates [line items]
Total assets	133,053	104,821
Total liabilities	106,419	86,984
Sales	15,190	0
Profit (loss) for the period	8,797	(1,678)
Haeparang Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	40,698	19,394
Total liabilities	32,359	10,721
Sales	0	0
Profit (loss) for the period	(335)	(211)
Saemangeum Sebit Power Plant Co., Ltd.
Disclosure of associates [line items]
Total assets	165,283	167,822
Total liabilities	97,997	131,383
Sales	22,663	23,159
Profit (loss) for the period	(812)	7,742
Boulder Solar III, LLC
Disclosure of associates [line items]
Total assets	1,929	1,896
Total liabilities	0	0
Sales	0	0
Profit (loss) for the period	0	0
PlatformN. Co., Ltd
Disclosure of associates [line items]
Total assets	184	379
Total liabilities	394	94
Sales	404	486
Profit (loss) for the period	(566)	(70)
PT. Cirebon Energi Prasarana
Disclosure of associates [line items]
Total assets	3,372,539	3,361,288
Total liabilities	2,606,566	2,670,941
Sales	434,806	319,986
Profit (loss) for the period	73,285	36,451
Green Radiation Co., Ltd
Disclosure of associates [line items]
Total assets	1,038	111
Total liabilities	812	34
Sales	298	89
Profit (loss) for the period	100	(93)
Future Convergence Technology Laboratory. Co., Ltd
Disclosure of associates [line items]
Total assets	479	551
Total liabilities	302	302
Sales	0	9
Profit (loss) for the period	(70)	(130)
SC E&G. Co,. Ltd
Disclosure of associates [line items]
Total assets	1,664	1,199
Total liabilities	329	131
Sales	633	1,048
Profit (loss) for the period	372	609
STN Co., Ltd. (formerly, Structure test network Co., Ltd.)
Disclosure of associates [line items]
Total assets	1,801	1,275
Total liabilities	1,081	447
Sales	856	754
Profit (loss) for the period	0	499
ACE
Disclosure of associates [line items]
Total assets	385	100
Total liabilities	348	0
Sales	53	0
Profit (loss) for the period	(30)	0
Environment and Energy Co., Ltd
Disclosure of associates [line items]
Total assets	89	93
Total liabilities	0	0
Sales	0	0
Profit (loss) for the period	(4)	(7)
Santiago Solar Power SpA
Disclosure of associates [line items]
Total assets	88,687	56,138
Total liabilities	65,149	29,390
Sales	0	0
Profit (loss) for the period	(2,994)	(2,943)
Yanggu Floating Photovoltaic Power Plant Inc
Disclosure of associates [line items]
Total assets	17,092	3,115
Total liabilities	14,470	0
Sales	135	0
Profit (loss) for the period	(495)	₩ 0
Power Embedded
Disclosure of associates [line items]
Total assets	298
Total liabilities	2
Sales	0
Profit (loss) for the period	(2)
Changwon SG Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	5,738
Total liabilities	1,649
Sales	436
Profit (loss) for the period	(703)
Donpyung Technology. Co., Ltd.
Disclosure of associates [line items]
Total assets	2,039
Total liabilities	643
Sales	1,664
Profit (loss) for the period	93
HORANG ENERGY Inc.
Disclosure of associates [line items]
Total assets	64,736
Total liabilities	54,923
Sales	0
Profit (loss) for the period	(389)
Hoenggye Renewable Energy Co., Ltd
Disclosure of associates [line items]
Total assets	24,702
Total liabilities	25,730
Sales	0
Profit (loss) for the period	(4,864)
Haman Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	40,801
Total liabilities	32,285
Sales	0
Profit (loss) for the period	(5,116)
Songsan Green Energy Co., Ltd.
Disclosure of associates [line items]
Total assets	46,016
Total liabilities	32,262
Sales	0
Profit (loss) for the period	₩ (100)

Investments in Associates 4 (De

Investments in Associates 4 (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Disclosure of associates [line items]
Effective percentage of ownership				20%
Book value		₩ 6,176,889		₩ 5,844,464		₩ 5,232,373
Korea Gas Corporation
Disclosure of associates [line items]
Net assets		₩ 9,826,038		₩ 10,410,740
Effective percentage of ownership	[1]	20.47%		20.47%
Share in net assets		₩ 2,011,390		₩ 2,131,078
Investment differential		0		0
Intercompany transaction		0		0
Others		(40,747)		(45,782)
Book value		1,970,643		2,085,296		1,815,513
Korea Electric Power Industrial Development Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 101,723		₩ 107,166
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 29,500		₩ 31,078
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		29,500		31,078		24,617
YTN Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 244,080		₩ 256,791
Effective percentage of ownership	[1]	21.43%		21.43%
Share in net assets		₩ 52,303		₩ 55,027
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		52,303	[2]	55,027	[3]	51,828
Gangwon Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 79,682		₩ 80,729
Effective percentage of ownership	[1]	15%		15%
Share in net assets		₩ 11,952		₩ 12,109
Investment differential		49		49
Intercompany transaction		0		0
Others		0		0
Book value		12,001	[4]	12,158	[4]	10,554
Hyundai Green Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 407,491		₩ 413,072
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 118,173		₩ 119,791
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		118,173		119,791		121,955
Korea Power Exchange
Disclosure of associates [line items]
Net assets		₩ 274,286		₩ 275,126
Effective percentage of ownership	[1]	100%		100%
Share in net assets		₩ 274,286		₩ 275,126
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		274,286	[5]	275,126	[5]	269,728
Taebaek Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets				₩ 24,168
Effective percentage of ownership	[1]			60%
Share in net assets				₩ 14,501
Investment differential				0
Intercompany transaction				0
Others				0
Book value		0		14,501	[6]	6,800
Taebaek Guinemi Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 16,043		₩ 15,327
Effective percentage of ownership	[1]	67.25%		67.25%
Share in net assets		₩ 10,788		₩ 10,307
Investment differential		2,742		0
Intercompany transaction		0		0
Others		0		2,742
Book value		13,530	[7]	13,049	[6]	3,357
Daeryun Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 403,701		₩ 402,140
Effective percentage of ownership	[1]	6.85%		6.85%
Share in net assets		₩ 27,654		₩ 27,547
Investment differential		0		0
Intercompany transaction		0		0
Others		(820)		(820)
Book value		26,834	[4]	26,727	[4]	25,426
KNH Solar Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 11,828		₩ 10,679
Effective percentage of ownership	[1]	27%		27%
Share in net assets		₩ 3,194		₩ 2,883
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		3,194		2,883		2,278
SPC Power Corporation
Disclosure of associates [line items]
Net assets		₩ 258,764		₩ 228,534
Effective percentage of ownership	[1]	38%		38%
Share in net assets		₩ 98,330		₩ 86,843
Investment differential		0		0
Intercompany transaction		0		0
Others		(19,399)		(15,975)
Book value		78,931	[8]	70,868	[9]	65,046
Gemeng International Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 2,317,545		₩ 2,335,997
Effective percentage of ownership	[1]	42%		34%
Share in net assets		₩ 973,369		₩ 794,239
Investment differential		0		0
Intercompany transaction		0		0
Others		(267,557)		(215,418)
Book value		705,812		578,821		595,218
PT. Cirebon Electric Power
Disclosure of associates [line items]
Net assets		₩ 488,215		₩ 491,324
Effective percentage of ownership	[1]	27.50%		27.50%
Share in net assets		₩ 134,259		₩ 135,114
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		134,259		135,114		121,969
KNOC Nigerian East Oil Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (84,988)		₩ (83,483)
Effective percentage of ownership	[1]	14.63%		14.63%
Share in net assets		₩ (12,434)		₩ (12,214)
Investment differential		0		0
Intercompany transaction		0		0
Others		12,434		12,214
Book value		0	[10]	0	[10]	0
KNOC Nigerian West Oil Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (78,143)		₩ (76,755)
Effective percentage of ownership	[1]	14.63%		14.63%
Share in net assets		₩ (11,432)		₩ (11,229)
Investment differential		0		0
Intercompany transaction		0		0
Others		11,432		11,229
Book value		0	[10]	0	[10]	0
PT Wampu Electric Power
Disclosure of associates [line items]
Net assets		₩ 75,120		₩ 82,051
Effective percentage of ownership	[1]	46%		46%
Share in net assets		₩ 34,555		₩ 37,743
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		34,555		37,743		35,077
PT. Bayan Resources TBK
Disclosure of associates [line items]
Net assets		₩ 2,428,465		₩ 2,476,409
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 485,693		₩ 495,282
Investment differential		209,894		265,817
Intercompany transaction		0		0
Others		(76,380)		(76,380)
Book value		619,207		684,719		661,289
S-Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 334,591		₩ 290,656
Effective percentage of ownership	[1]	49%		49%
Share in net assets		₩ 163,950		₩ 142,421
Investment differential		0		0
Intercompany transaction		(1,185)		(1,293)
Others		0		0
Book value		162,765		141,128		122,786
Pioneer Gas Power Limited
Disclosure of associates [line items]
Net assets		₩ (257,311)		₩ (205,787)
Effective percentage of ownership	[1]	38.50%		38.50%
Share in net assets		₩ (99,058)		₩ (79,223)
Investment differential		22,278		22,278
Intercompany transaction		0		0
Others		76,780		56,945
Book value		0		0		0
Eurasia Energy Holdings
Disclosure of associates [line items]
Net assets				₩ (508)
Effective percentage of ownership	[1]			40%
Share in net assets				₩ (203)
Investment differential				0
Intercompany transaction				0
Others				203
Book value		0		0		0
Xe-Pian Xe-Namnoy Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 469,397		₩ 466,385
Effective percentage of ownership	[1]	25%		25%
Share in net assets		₩ 117,349		₩ 116,596
Investment differential		305		305
Intercompany transaction		(987)		(1,028)
Others		(289)		(289)
Book value		116,378		115,584		92,441
PT. Mutiara Jawa
Disclosure of associates [line items]
Net assets		₩ 17,822		₩ 12,402
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 5,168		₩ 3,597
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		5,168		3,597		2,569
Samcheok Eco Materials Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (17,351)		₩ 23,343
Effective percentage of ownership	[1]	25.54%		25.54%
Share in net assets		₩ (4,431)		₩ 5,962
Investment differential		0		0
Intercompany transaction		0		0
Others		4,431		(5,962)
Book value		0		0		0
Noeul Green Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (17,973)		₩ (18,861)
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ (5,212)		₩ (5,470)
Investment differential		0		0
Intercompany transaction		0		0
Others		5,212		5,470
Book value		0		0		3,808
Goseong Green Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,001,702		₩ 1,001,651
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 290,494		₩ 290,479
Investment differential		0		0
Intercompany transaction		(2,870)		(1,586)
Others		0		0
Book value		287,624		288,893		260,858
Gangneung Eco Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 716,901		₩ 7,464
Effective percentage of ownership	[1]	29%		1.61%
Share in net assets		₩ 207,901		₩ 120
Investment differential		48,531		0
Intercompany transaction		(1,503)		(134)
Others		0		14
Book value		254,929	[11]	0	[4]	2,288
Shin Pyeongtaek Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 390,335		₩ 363,838
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 156,134		₩ 145,535
Investment differential		3,559		3,559
Intercompany transaction		(14,667)		(15,271)
Others		0		0
Book value		145,026		133,823		93,074
Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,045		₩ 986
Effective percentage of ownership	[1]	28%		28%
Share in net assets		₩ 293		₩ 276
Investment differential		0		0
Intercompany transaction		0		0
Others		1		2
Book value		294		278		223
Dongducheon Dream Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 294,848		₩ 302,071
Effective percentage of ownership	[1]	34.01%		34.01%
Share in net assets		₩ 100,278		₩ 102,734
Investment differential		1,757		1,757
Intercompany transaction		(2,249)		(2,609)
Others		(12,583)		(12,582)
Book value		87,203	[12]	89,300	[12]	74,198
Jinbhuvish Power Generation Pvt. Ltd.
Disclosure of associates [line items]
Net assets		₩ 48,583		₩ 47,988
Effective percentage of ownership	[1]	5.16%		5.16%
Share in net assets		₩ 2,526		₩ 2,496
Investment differential		0		0
Intercompany transaction		0		0
Others		(2,526)		(2,496)
Book value		0	[4]	0	[4]	0
Daejung Offshore Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 3,183		₩ 3,337
Effective percentage of ownership	[1]	46.59%		46.59%
Share in net assets		₩ 1,483		₩ 1,555
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		1,483		1,555		1,704
GS Donghae Electric Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 762,013		₩ 765,131
Effective percentage of ownership	[1]	34%		34%
Share in net assets		₩ 259,085		₩ 260,145
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		259,085		260,145		243,772
Daegu Photovoltaic Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 9,669		₩ 9,823
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 2,804		₩ 2,849
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		2,804		2,849		2,342
Busan Green Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 11,239		₩ 15,156
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 3,259		₩ 4,395
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		3,259		4,395		5,032
Gunsan Bio Energy Co., Ltd.
Disclosure of associates [line items]
Net assets				₩ (21,127)
Effective percentage of ownership	[1]			18.87%
Share in net assets				₩ (3,986)
Investment differential				0
Intercompany transaction				0
Others				3,986
Book value		0		0	[4]	0
Hansuwon KNP Co., Ltd. (formerly, Korea Nuclear Partners Co., Ltd.)
Disclosure of associates [line items]
Net assets		₩ 2,164		₩ 1,519
Effective percentage of ownership	[1]	28.98%		28.98%
Share in net assets		₩ 627		₩ 440
Investment differential		0		0
Intercompany transaction		0		0
Others		(160)		(160)
Book value		467		280		219
Korea Electric Power Corporation Fund
Disclosure of associates [line items]
Net assets		₩ 23,873		₩ 29,400
Effective percentage of ownership	[1]	98.09%		98.09%
Share in net assets		₩ 23,417		₩ 28,838
Investment differential		0		0
Intercompany transaction		0		0
Others		4		4
Book value		23,421	[13]	28,842	[13]	47,983
Energy Infra Asset Management Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 12,257		₩ 11,956
Effective percentage of ownership	[1]	9.90%		9.90%
Share in net assets		₩ 1,213		₩ 1,184
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		1,213	[14]	1,184	[4]	1,066
Daegu clean Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 44		₩ 44
Effective percentage of ownership	[1]	28%		28%
Share in net assets		₩ 12		₩ 12
Investment differential		0		0
Intercompany transaction		0		0
Others		(12)		0
Book value		0		12		12
Yaksu ESS Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 980		₩ 1,670
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 284		₩ 484
Investment differential		1		2
Intercompany transaction		0		0
Others		0		0
Book value		285		486
Nepal Water & Energy Development Company Private Limited
Disclosure of associates [line items]
Net assets		₩ 159,265		₩ 99,862
Effective percentage of ownership	[1]	68.88%		69.06%
Share in net assets		₩ 109,701		₩ 68,968
Investment differential		872		972
Intercompany transaction		0		0
Others		0		0
Book value		110,573		69,940
Gwangyang Green Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 123,103		₩ 125,130
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 24,620		₩ 25,026
Investment differential		18		18
Intercompany transaction		0		0
Others		0		0
Book value		24,638		25,044		25,466
PND Solar Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 4,677		₩ 4,306
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 1,356		₩ 1,249
Investment differential		154		154
Intercompany transaction		0		0
Others		0		0
Book value		1,510		1,403		1,229
Hyundai Eco Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 40,699		₩ 39,033
Effective percentage of ownership	[1]	19%		19%
Share in net assets		₩ 7,733		₩ 7,416
Investment differential		214		215
Intercompany transaction		0		0
Others		0		0
Book value		7,947	[4]	7,631	[4]	5,572
YeongGwang Yaksu Wind Electric Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 547		₩ 788
Effective percentage of ownership	[1]	9.63%		9.63%
Share in net assets		₩ 53		₩ 76
Investment differential		300		300
Intercompany transaction		0		0
Others		(220)		(220)
Book value		133	[4]	156	[4]	233
Green Energy Electricity Generation Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (2,658)		₩ 2,733
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ (771)		₩ 793
Investment differential		779		778
Intercompany transaction		0		0
Others		0		0
Book value		8		1,571		1,713
Korea Energy Solutions Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 848		₩ 466
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 170		₩ 93
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		170		93		123
ITR Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (10)		₩ (26)
Effective percentage of ownership	[1]	10%		20%
Share in net assets		₩ (1)		₩ (5)
Investment differential		0		1
Intercompany transaction		0		0
Others		1		4
Book value		0	[15]	0		32
STN Co., Ltd. (formerly, Structure test network Co., Ltd.)
Disclosure of associates [line items]
Net assets		₩ 1,691		₩ 1,565
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 338		₩ 313
Investment differential		53		53
Intercompany transaction		0		0
Others		0		0
Book value		391		366		306
Namjeongsusang Solar Power Operation Co., Ltd.
Disclosure of associates [line items]
Net assets				₩ 2,355
Effective percentage of ownership	[1]			15%
Share in net assets				₩ 353
Investment differential				20
Intercompany transaction				0
Others				0
Book value		0		373	[16]	361
Indeck Niles Development, LLC
Disclosure of associates [line items]
Net assets		₩ 482,200		₩ 416,164
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 241,100		₩ 208,082
Investment differential		90,074		93,956
Intercompany transaction		0		0
Others		4,227		0
Book value		335,401		302,038		246,273
Indeck Niles Asset Management, LLC
Disclosure of associates [line items]
Net assets		₩ 278		₩ 283
Effective percentage of ownership	[1]	33.33%		33.33%
Share in net assets		₩ 93		₩ 94
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		93		94		111
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1
Disclosure of associates [line items]
Net assets		₩ 13,258		₩ 14,146
Effective percentage of ownership	[1]	49%		49%
Share in net assets		₩ 6,496		₩ 6,932
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		6,496		6,932		7,138
Suwon New Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 2,318		₩ 1,978
Effective percentage of ownership	[1]	33.05%		33.05%
Share in net assets		₩ 766		₩ 654
Investment differential		0		0
Intercompany transaction		256		265
Others		0		0
Book value		1,022		919		1,035
Gwangbaek Solar Power Investment Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 10,998		₩ 10,949
Effective percentage of ownership	[1]	44%		44%
Share in net assets		₩ 4,839		₩ 4,818
Investment differential		316		315
Intercompany transaction		0		0
Others		0		0
Book value		5,155		5,133		4,806
Go deok Clean Energy Co., Ltd
Disclosure of associates [line items]
Net assets		₩ 11,807		₩ 11,049
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 4,723		₩ 4,420
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		4,723		4,420		4,302
SureDataLab Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 474		₩ 739
Effective percentage of ownership	[1]	23.95%		23.95%
Share in net assets		₩ 114		₩ 177
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		114		177		128
SEP Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (72)		₩ (65)
Effective percentage of ownership	[1]	21.26%		21.26%
Share in net assets		₩ (15)		₩ (14)
Investment differential		0		0
Intercompany transaction		0		0
Others		15		14
Book value		0		0		7
Hankook Electric Power Information Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,296		₩ 1,337
Effective percentage of ownership	[1]	16.49%		16.49%
Share in net assets		₩ 214		₩ 220
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		214	[17]	220	[17]	161
Tronix Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,757		₩ 526
Effective percentage of ownership	[1]	12.50%		12.50%
Share in net assets		₩ 220		₩ 66
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		220	[17]	66	[17]	109
O2&B Global Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 105		₩ 181
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 21		₩ 36
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		21		36		35
Muan Sunshine Solar Power Plant Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 11,637		₩ 10,338
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 2,328		₩ 2,068
Investment differential		494		494
Intercompany transaction		0		0
Others		0		0
Book value		2,822		2,562		1,268
Bigeum Resident Photovoltaic Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ (5,723)		₩ (1,539)
Effective percentage of ownership	[1]	29.90%		29.90%
Share in net assets		₩ (1,711)		₩ (460)
Investment differential		24		24
Intercompany transaction		0		0
Others		1,687		436
Book value		0		0		0
Goesan Solar Park Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 9,921		₩ 8,936
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 2,877		₩ 2,591
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		2,877		2,591		1,927
Saemangeum Heemang Photovoltaic Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 39,089		₩ 35,060
Effective percentage of ownership	[1]	35%		35%
Share in net assets		₩ 13,681		₩ 12,271
Investment differential		739		739
Intercompany transaction		0		0
Others		0		0
Book value		14,420		13,010		10,238
Bitgoel Eco Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 25,269		₩ 18,249
Effective percentage of ownership	[1]	49.05%		49.05%
Share in net assets		₩ 12,394		₩ 8,951
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		12,394		8,951		4,356
Jeju Gimnyeong Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 819		₩ 2,907
Effective percentage of ownership	[1]	30%		30%
Share in net assets		₩ 246		₩ 872
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		246		872		911
Seoroseoro Sunny Power Plant Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 2,163		₩ 1,970
Effective percentage of ownership	[1]	42.58%		42.58%
Share in net assets		₩ 921		₩ 839
Investment differential		20		20
Intercompany transaction		0		0
Others		0		0
Book value		941		859		721
Muan Solar park Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 32,526		₩ 37,565
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 6,505		₩ 7,513
Investment differential		325		325
Intercompany transaction		0		0
Others		0		0
Book value		6,830		7,838		6,083
YuDang Solar Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 2,849		₩ 2,929
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 570		₩ 586
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		570		586		565
Anjwa Smart Farm & Solar City Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 34,245		₩ 39,225
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 6,849		₩ 7,845
Investment differential		816		817
Intercompany transaction		0		0
Others		0		0
Book value		7,665		8,662		6,784
KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)
Disclosure of associates [line items]
Net assets		₩ 30,506		₩ 17,514
Effective percentage of ownership	[1]	25.36%		25.36%
Share in net assets		₩ 7,735		₩ 4,441
Investment differential		44		44
Intercompany transaction		0		0
Others		0		0
Book value		7,779		4,485		3,877
G.GURU Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 676		₩ 1,216
Effective percentage of ownership	[1]	24.65%		24.65%
Share in net assets		₩ 167		₩ 300
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		167		300		403
UD4M Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,048		₩ 1,125
Effective percentage of ownership	[1]	14.29%		14.29%
Share in net assets		₩ 150		₩ 161
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		150		161		144
Dongbu Highway Solar Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,650		₩ 1,509
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 330		₩ 302
Investment differential		50		50
Intercompany transaction		0		0
Others		0		0
Book value		380		352
Seobu Highway Solar Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 2,032		₩ 1,581
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 406		₩ 316
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		406		316
Korea Energy Data Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 122		₩ 211
Effective percentage of ownership	[1]	29.37%		29.37%
Share in net assets		₩ 36		₩ 62
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		36		62		62
Gangneung Sacheon Fuel Cell Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 18,982		₩ 10,218
Effective percentage of ownership	[1]	41%		41%
Share in net assets		₩ 7,783		₩ 4,189
Investment differential		87		88
Intercompany transaction		0		0
Others		0		0
Book value		7,870		4,277		1,878
KOSTURE Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 174		₩ 156
Effective percentage of ownership	[1]	4.42%		0.82%
Share in net assets		₩ 8		₩ 1
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		8	[4]	1	[4]	0
Taebaek Gadeoksan Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 57,135		₩ 58,940
Effective percentage of ownership	[1]	34%		34%
Share in net assets		₩ 19,426		₩ 20,040
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		19,426		20,040		16,495
Chuncheon Green Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 19,659		₩ 20,226
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 8,847		₩ 9,102
Investment differential		53		53
Intercompany transaction		0		0
Others		0		0
Book value		8,900		9,155		3,372
Yeomsubong Wind Power Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 2,156		₩ 1,540
Effective percentage of ownership	[1]	29%		3.81%
Share in net assets		₩ 625		₩ 59
Investment differential		246		3
Intercompany transaction		0		0
Others		0		0
Book value		871	[18]	62	[19]	95
Yeongyang Wind Power Corporation II
Disclosure of associates [line items]
Net assets		₩ 26,634		₩ 17,837
Effective percentage of ownership	[1]	30%		30%
Share in net assets		₩ 7,990		₩ 5,351
Investment differential		2,110		2,110
Intercompany transaction		0		0
Others		0		0
Book value		10,100		7,461		7,965
Haeparang Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 8,339		₩ 8,673
Effective percentage of ownership	[1]	25%		25%
Share in net assets		₩ 2,084		₩ 2,168
Investment differential		20		20
Intercompany transaction		0		0
Others		0		0
Book value		2,104		2,188		2,241
Saemangeum Sebit Power Plant Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 67,286		₩ 36,439
Effective percentage of ownership	[1]	55%		63.09%
Share in net assets		₩ 37,009		₩ 22,990
Investment differential		182		209
Intercompany transaction		0		0
Others		0		0
Book value		37,191	[20]	23,199	[21]	6,000
Boulder Solar III, LLC
Disclosure of associates [line items]
Net assets		₩ 1,929		₩ 1,896
Effective percentage of ownership	[1]	30%		30%
Share in net assets		₩ 579		₩ 569
Investment differential		175		175
Intercompany transaction		0		0
Others		0		0
Book value		754		744
PlatformN. Co., Ltd
Disclosure of associates [line items]
Net assets		₩ (210)		₩ 285
Effective percentage of ownership	[1]	29.58%		29.58%
Share in net assets		₩ (62)		₩ 84
Investment differential		0		0
Intercompany transaction		0		0
Others		62		0
Book value		0		84		0
PT. Cirebon Energi Prasarana
Disclosure of associates [line items]
Net assets		₩ 765,973		₩ 690,347
Effective percentage of ownership	[1]	10%		10%
Share in net assets		₩ 76,597		₩ 69,035
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		76,597	[16]	69,035	[16]	0
Green Radiation Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 226		₩ 77
Effective percentage of ownership	[1]	10%		10%
Share in net assets		₩ 23		₩ 8
Investment differential		3		3
Intercompany transaction		0		0
Others		0		0
Book value	[17]	26		11
Future Convergence Technology Laboratory. Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 177		₩ 249
Effective percentage of ownership	[1]	20.12%		20.12%
Share in net assets		₩ 36		₩ 50
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		36		50
Eco motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.)
Disclosure of associates [line items]
Net assets		₩ 1,335		₩ 1,068
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 267		₩ 214
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		267		214		0
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.)
Disclosure of associates [line items]
Net assets		₩ 720		₩ 828
Effective percentage of ownership	[1]	16.67%		20%
Share in net assets		₩ 120		₩ 166
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		120	[14]	166		0
ACE
Disclosure of associates [line items]
Net assets		₩ 37		₩ 100
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 7		₩ 20
Investment differential		0		0
Intercompany transaction		(5)		0
Others		0		0
Book value		2		20		0
Environment and Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 89		₩ 93
Effective percentage of ownership	[1]	10.54%		10.54%
Share in net assets		₩ 9		₩ 10
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		9	[17]	10	[17]	0
Santiago Solar Power SpA
Disclosure of associates [line items]
Net assets		₩ 23,538		₩ 26,748
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 11,769		₩ 13,373
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		11,769		13,373		0
Yanggu Floating Photovoltaic Power Plant Inc.
Disclosure of associates [line items]
Net assets		₩ 2,622		₩ 3,115
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 760		₩ 903
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		760		903		₩ 0
Power Embedded
Disclosure of associates [line items]
Net assets		₩ 296
Effective percentage of ownership	[1]	23.33%
Share in net assets		₩ 69
Investment differential		1
Intercompany transaction		0
Others		0
Book value		70		0
Changwon SG Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 4,089
Effective percentage of ownership	[1]	18.78%
Share in net assets		₩ 768
Investment differential		15
Intercompany transaction		0
Others		0
Book value		783	[17]	0
Donpyung Technology. Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 1,396
Effective percentage of ownership	[1]	20%
Share in net assets		₩ 279
Investment differential		0
Intercompany transaction		(25)
Others		0
Book value		254		0
HORANG ENERGY Inc.
Disclosure of associates [line items]
Net assets		₩ 9,813
Effective percentage of ownership	[1]	40%
Share in net assets		₩ 3,925
Investment differential		224
Intercompany transaction		0
Others		0
Book value		4,149		0
Hoenggye Renewable Energy Co., Ltd
Disclosure of associates [line items]
Net assets		₩ (1,028)
Effective percentage of ownership	[1]	36.10%
Share in net assets		₩ (370)
Investment differential		2,270
Intercompany transaction		0
Others		475
Book value		2,375		0
Haman Green Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 8,516
Effective percentage of ownership	[1]	35%
Share in net assets		₩ 2,981
Investment differential		0
Intercompany transaction		0
Others		0
Book value		2,981		0
Songsan Green Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 13,754
Effective percentage of ownership	[1]	60%
Share in net assets		₩ 8,252
Investment differential		71
Intercompany transaction		0
Others		0
Book value		8,323	[22]	₩ 0
Eumseong Eco Park Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 26,929
Effective percentage of ownership	[1]	29%
Share in net assets		₩ 7,809
Investment differential		577
Intercompany transaction		0
Others		0
Book value		8,386
Changwon Nu-ri Energy Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 13,154
Effective percentage of ownership	[1]	61%
Share in net assets		₩ 8,024
Investment differential		3
Intercompany transaction		0
Others		0
Book value		8,027
PungBack Wind Farm Corporation
Disclosure of associates [line items]
Net assets		₩ 18,526
Effective percentage of ownership	[1]	37%
Share in net assets		₩ 6,855
Investment differential		1,085
Intercompany transaction		0
Others		0
Book value		7,940
Trumbull Asset Management, LLC
Disclosure of associates [line items]
Net assets		₩ 1,200
Effective percentage of ownership	[1]	78%
Share in net assets		₩ 936
Investment differential		0
Intercompany transaction		0
Others		0
Book value		936
S-Power Chile SpA
Disclosure of associates [line items]
Net assets		₩ (150)
Effective percentage of ownership	[1]	50%
Share in net assets		₩ (75)
Investment differential		139
Intercompany transaction		0
Others		0
Book value		64
Seungmun Green Energy
Disclosure of associates [line items]
Net assets		₩ 29,566
Effective percentage of ownership	[1]	33%
Share in net assets		₩ 9,757
Investment differential		0
Intercompany transaction		0
Others		0
Book value		9,757
Seobusambo highway photovoltaics Co., Ltd.
Disclosure of associates [line items]
Net assets		₩ 4,476
Effective percentage of ownership	[1]	80%
Share in net assets		₩ 3,580
Investment differential		0
Intercompany transaction		0
Others		0
Book value		₩ 3,580
[1]The percentage of ownership shown above is after considering the treasury stocks and others.[2]the Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn’t started the active selling procedures as of December 31, 2023.[3]The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022.[4]The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors.[5]The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity.[6]After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating in the board of directors by the shareholders’ agreement. Accordingly, the entity is classified as an associate.[7]The effective percentage of ownership is more than 50%. However, by the shareholders’ agreement, the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision committee. Accordingly, the entity is classified as an associate.[8]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.[9]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.[10]The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity.[11]The effective percentage of ownership changed due to the disproportionate capital reduction of financial investors during the year ended December 31, 2023.[12]The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock.[13]The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[14]Although the Company’s effective percentage of ownership is less than 20%, the Company can exercise significant influence on the entity through its contractual right to appoint one director to the entity’s board of directors.[15]Although the Company’s effective percentage of ownership is less than 20%, the entity has been classified as an associate as the Company has significant influence on the entity considering the fact that ordinary resolutions passed at the shareholders’ meeting require the majority decision and the Company has the right to elect the entity’s directors.[16]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation.[17]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity.[18]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase.[19]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation.[20]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2023. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[21]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[22]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.

Investments in Joint Ventures 1

Investments in Joint Ventures 1 (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Disclosure of joint ventures [line items]
Acquisition cost		₩ 2,431,604		₩ 2,332,579
Total acquisition cost		5,940,703		5,422,262
Book value [Abstract]
Total book value		9,662,588		8,992,048
Book value		3,485,699		₩ 3,147,584		₩ 2,239,011
KEPCO-Uhde Inc.
Disclosure of joint ventures [line items]
Key operation activities	[1]			Power generation
Location	[1]			Korea
Percentage of ownership	[1]			52.80%
Acquisition cost	[1]			₩ 11,355
Book value [Abstract]
Book value		₩ 0		₩ 17	[1]	58
Shuweihat Asia Power Investment B.V.
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company
Location		Netherlands		Netherlands
Percentage of ownership		49%		49%
Acquisition cost		₩ 44,405		₩ 44,405
Book value [Abstract]
Book value		₩ 69,902		₩ 66,452		37,069
Shuweihat Asia Operation & Maintenance Company
Disclosure of joint ventures [line items]
Key operation activities		Maintenance of utility plant		Maintenance of utility plant	[1]
Location		Cayman		Cayman	[1]
Percentage of ownership		55%		55%	[1]
Acquisition cost		₩ 30		₩ 30	[1]
Book value [Abstract]
Book value		₩ 1,818		₩ 1,631	[1]	1,380
Waterbury Lake Uranium L.P.
Disclosure of joint ventures [line items]
Key operation activities	[2]	Resources development		Resources development
Location	[2]	Canada		Canada
Percentage of ownership	[2]	30.65%		32.59%
Acquisition cost	[2]	₩ 26,602		₩ 26,602
Book value [Abstract]
Book value		₩ 22,612	[2]	₩ 21,750	[2]	21,590
ASM-BG Investicii AD
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Bulgaria		Bulgaria
Percentage of ownership		50%		50%
Acquisition cost		₩ 9,846		₩ 9,846
Book value [Abstract]
Book value		₩ 14,739		₩ 14,555		18,692
RES Technology AD
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Bulgaria		Bulgaria
Percentage of ownership		50%		50%
Acquisition cost		₩ 11,922		₩ 11,922
Book value [Abstract]
Book value		₩ 14,383		₩ 15,133		16,703
KV Holdings, Inc.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[3]
Location		Philippines		Philippines	[3]
Percentage of ownership		40%		40%	[3]
Acquisition cost		₩ 2,103		₩ 2,103	[3]
Book value [Abstract]
Book value		₩ 5,186		₩ 9,659	[3]	2,527
KEPCO SPC Power Corporation
Disclosure of joint ventures [line items]
Key operation activities		Construction and operation of utility plant	[1],[4]	Construction and operation of utility plant	[3]
Location		Philippines	[1],[4]	Philippines	[3]
Percentage of ownership		75.20%	[1],[4]	75.20%	[3]
Acquisition cost		₩ 94,579	[1],[4]	₩ 94,579	[3]
Book value [Abstract]
Book value		₩ 196,544	[1],[4]	₩ 179,594	[3]	198,979
Gansu Datang Yumen Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		China		China
Percentage of ownership		40%		40%
Acquisition cost		₩ 16,621		₩ 16,621
Book value [Abstract]
Book value		₩ 6,315		₩ 6,024		6,635
Datang Chifeng Renewable Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		China		China
Percentage of ownership		40%		40%
Acquisition cost		₩ 121,928		₩ 121,928
Book value [Abstract]
Book value		₩ 186,739		₩ 191,982		204,587
Datang KEPCO Chaoyang Renewable Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		China		China
Percentage of ownership		40%		40%
Acquisition cost		₩ 39,872		₩ 39,872
Book value [Abstract]
Book value		₩ 43,207		₩ 44,398		44,217
Rabigh Electricity Company
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Saudi arabia		Saudi arabia
Percentage of ownership		40%		40%
Acquisition cost		₩ 109,743		₩ 109,743
Book value [Abstract]
Book value		₩ 235,051		₩ 214,607		143,678
Rabigh Operation & Maintenance Company Limited
Disclosure of joint ventures [line items]
Key operation activities		Maintenance of utility plant		Maintenance of utility plant
Location		Saudi arabia		Saudi arabia
Percentage of ownership		40%		40%
Acquisition cost		₩ 70		₩ 70
Book value [Abstract]
Book value		₩ 4,964		₩ 5,113		4,071
Jamaica Public Service Company Limited
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Jamaica		Jamaica
Percentage of ownership		40%		40%
Acquisition cost		₩ 301,910		₩ 301,910
Book value [Abstract]
Book value		₩ 349,866		₩ 331,407		294,649
KW Nuclear Components Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Manufacturing		Manufacturing
Location		Korea		Korea
Percentage of ownership		45%		45%
Acquisition cost		₩ 833		₩ 833
Book value [Abstract]
Book value		₩ 18,680		₩ 17,090		15,734
Busan Shinho Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		25%		25%
Acquisition cost		₩ 2,100		₩ 2,100
Book value [Abstract]
Book value		₩ 6,669		₩ 6,719		5,841
Global Trade Of Power System Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Exporting products and technology of small or medium business by proxy		Exporting products and technology of small or medium business by proxy	[5]
Location		Korea		Korea	[5]
Percentage of ownership		29%		29%	[5]
Acquisition cost		₩ 290		₩ 290	[5]
Book value [Abstract]
Book value		₩ 615		₩ 698	[5]	597
Expressway Solar-light Power Generation Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[6]
Location		Korea		Korea	[6]
Percentage of ownership		50%		50%	[6]
Acquisition cost		₩ 1,856		₩ 1,856	[6]
Book value [Abstract]
Book value		₩ 5,187		₩ 4,754	[6]	3,084
Amman Asia Electric Power Company
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[1]
Location		Jordan		Jordan	[1]
Percentage of ownership		60%		60%	[1]
Acquisition cost		₩ 111,476		₩ 111,476	[1]
Book value [Abstract]
Book value		₩ 223,424		₩ 220,254	[1]	178,679
KAPES, Inc.
Disclosure of joint ventures [line items]
Key operation activities		R & D		R & D	[1]
Location		Korea		Korea	[1]
Percentage of ownership		51%		51%	[1]
Acquisition cost		₩ 5,629		₩ 5,629	[1]
Book value [Abstract]
Book value		₩ 0		₩ 0	[1]	0
Honam Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 3,480		₩ 3,480
Book value [Abstract]
Book value		₩ 4,743		₩ 4,819		4,041
Korea Power Engineering Service Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Construction and service		Construction and service
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 290		₩ 290
Book value [Abstract]
Book value		₩ 5,708		₩ 5,543		5,415
Chun-cheon Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29.90%		29.90%
Acquisition cost		₩ 52,700		₩ 52,700
Book value [Abstract]
Book value		₩ 35,083		₩ 32,044		25,896
Yeonggwangbaeksu Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[5]
Location		Korea		Korea	[5]
Percentage of ownership		15%		15%	[5]
Acquisition cost		₩ 3,000		₩ 3,000	[5]
Book value [Abstract]
Book value		₩ 3,443		₩ 3,151	[5]	2,728
Nghi Son 2 Power LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Vietnam		Vietnam
Percentage of ownership		50%		50%
Acquisition cost		₩ 175,261		₩ 175,261
Book value [Abstract]
Book value		₩ 417,989		₩ 408,839		0
Kelar S.A
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[1]
Location		Chile		Chile	[1]
Percentage of ownership		65%		65%	[1]
Acquisition cost		₩ 78,060		₩ 78,060	[1]
Book value [Abstract]
Book value		₩ 131,529		₩ 117,137	[1]	86,695
PT. Tanjung Power Indonesia
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Indonesia		Indonesia
Percentage of ownership		35%		35%
Acquisition cost		₩ 57,039		₩ 57,039
Book value [Abstract]
Book value		₩ 90,151		₩ 92,907		46,546
Incheon New Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[2]
Location		Korea		Korea	[2]
Percentage of ownership		29%		29%	[2]
Acquisition cost		₩ 461		₩ 461	[2]
Book value [Abstract]
Book value		₩ 298		₩ 198	[2]	0
Seokmun Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 15,370		₩ 15,370
Book value [Abstract]
Book value		₩ 16,591		₩ 17,336		13,842
Daehan Wind Power PSC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Jordan		Jordan
Percentage of ownership		50%		50%
Acquisition cost		₩ 7,493		₩ 7,493
Book value [Abstract]
Book value		₩ 16,426		₩ 13,923		5,154
Barakah One Company
Disclosure of joint ventures [line items]
Key operation activities	[7]	Power generation		Power generation
Location	[7]	UAE		UAE
Percentage of ownership	[7]	18%		18%
Acquisition cost	[7]	₩ 118		₩ 118
Book value [Abstract]
Book value		₩ 0	[7]	₩ 0	[7]	0
Nawah Energy Company
Disclosure of joint ventures [line items]
Key operation activities	[7]	Operation of utility plant		Operation of utility plant
Location	[7]	UAE		UAE
Percentage of ownership	[7]	18%		18%
Acquisition cost	[7]	₩ 296		₩ 296
Book value [Abstract]
Book value		₩ 330	[7]	₩ 315	[7]	294
MOMENTUM
Disclosure of joint ventures [line items]
Key operation activities		International thermonuclear experimental reactor construction management		International thermonuclear experimental reactor construction management
Location		France		France
Percentage of ownership		33.33%		33.33%
Acquisition cost		₩ 1		₩ 1
Book value [Abstract]
Book value		₩ 209		₩ 345		368
Daegu Green Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[8]
Location		Korea		Korea	[8]
Percentage of ownership		29%		29%	[8]
Acquisition cost		₩ 46,225		₩ 46,225	[8]
Book value [Abstract]
Book value		₩ 26,430		₩ 29,360	[8]	24,054
Yeonggwang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		46%		46%
Acquisition cost		₩ 17,475		₩ 17,475
Book value [Abstract]
Book value		₩ 23,380		₩ 20,713		17,646
Chester Solar IV SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		45%		45%
Acquisition cost		₩ 1,700		₩ 1,700
Book value [Abstract]
Book value		₩ 484		₩ 181		0
Chester Solar V SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		45%		45%
Acquisition cost		₩ 525		₩ 525
Book value [Abstract]
Book value		₩ 191		₩ 156		25
Diego de Almagro Solar SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		45%		45%
Acquisition cost		₩ 2,091		₩ 2,091
Book value [Abstract]
Book value		₩ 954		₩ 540		362
South Jamaica Power Company Limited
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Jamaica		Jamaica
Percentage of ownership		20%		20%
Acquisition cost		₩ 20,430		₩ 20,430
Book value [Abstract]
Book value		₩ 43,109		₩ 46,437		37,360
Daesan Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		35%		35%
Acquisition cost		₩ 17,850		₩ 17,850
Book value [Abstract]
Book value		₩ 22,191		₩ 19,218		21,244
RE Holiday Holdings LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		50%		50%
Acquisition cost		₩ 42,948		₩ 42,948
Book value [Abstract]
Book value		₩ 84,092		₩ 85,370		73,167
RE Pioneer Holdings LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		50%		50%
Acquisition cost		₩ 27,891		₩ 27,891
Book value [Abstract]
Book value		₩ 54,081		₩ 55,172		47,015
RE Barren Ridge 1 Holdings LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		50%		50%
Acquisition cost		₩ 28,021		₩ 28,021
Book value [Abstract]
Book value		₩ 58,154		₩ 3,350		1,883
RE Astoria 2 LandCo LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		50%		50%
Acquisition cost		₩ 5,188		₩ 5,188
Book value [Abstract]
Book value		₩ 6,937		₩ 6,599		5,998
RE Barren Ridge LandCo LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		USA		USA
Percentage of ownership		50%		50%
Acquisition cost		₩ 2,187		₩ 2,187
Book value [Abstract]
Book value		₩ 2,441		₩ 2,333		2,120
Laurel SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		45%		45%
Acquisition cost		₩ 1,222		₩ 1,222
Book value [Abstract]
Book value		₩ 613		₩ 554		290
KIAMCO KOWEPO Bannerton Hold Co Pty Ltd
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[5]
Location		Australia		Australia	[5]
Percentage of ownership		12.37%		12.37%	[5]
Acquisition cost		₩ 4,095		₩ 4,095	[5]
Book value [Abstract]
Book value		3,719		₩ 3,651	[5]	3,625
Chile Solar JV SpA
Disclosure of joint ventures [line items]
Key operation activities				Power generation
Location				Chile
Percentage of ownership				50%
Acquisition cost				₩ 12,674
Book value [Abstract]
Book value		₩ 0		₩ 9,819		32,457
Cheong-Song Noraesan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities	[2]	Power generation		Power generation
Location	[2]	Korea		Korea
Percentage of ownership	[2]	29.01%		29.01%
Acquisition cost	[2]	₩ 3,200		₩ 3,200
Book value [Abstract]
Book value		₩ 3,756	[2]	₩ 4,263	[2]	4,106
Chester Solar I SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		45%		45%
Acquisition cost		₩ 1,181		₩ 1,181
Book value [Abstract]
Book value		₩ 1,238		₩ 1,314		1,120
Solar Philippines Calatagan Corporation
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Philippines		Philippines
Percentage of ownership		38%		38%
Acquisition cost		₩ 47,903		₩ 47,903
Book value [Abstract]
Book value		₩ 58,130		₩ 56,902		58,231
Saemangeum Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[9]
Location		Korea		Korea	[9]
Percentage of ownership		81.01%		81.01%	[9]
Acquisition cost		₩ 26,400		₩ 26,400	[9]
Book value [Abstract]
Book value		₩ 23,419		₩ 23,551	[9]	23,939
Chungsongmeon BongSan wind power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[5]
Location		Korea		Korea	[5]
Percentage of ownership		29%		29%	[5]
Acquisition cost		₩ 2,900		₩ 2,900	[5]
Book value [Abstract]
Book value		₩ 2,665		₩ 3,470	[5]	3,808
Jaeun Resident Wind Power Plant Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	29%		29%
Acquisition cost	[5]	₩ 2,494		₩ 2,494
Book value [Abstract]
Book value		₩ 2,214	[5]	₩ 2,236	[5]	1,958
DE Energia SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		49%		49%
Acquisition cost		₩ 8,364		₩ 8,364
Book value [Abstract]
Book value		₩ 9,703		₩ 9,536		8,921
Dangjin Eco Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		34%		34%
Acquisition cost		₩ 25,661		₩ 25,661
Book value [Abstract]
Book value		₩ 26,753		₩ 26,859
Haemodum Solar Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		49%		49%
Acquisition cost		₩ 2,940		₩ 2,940
Book value [Abstract]
Book value		₩ 3,122		₩ 3,367		3,081
Yangyang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		50%		50%
Acquisition cost		₩ 12,000		₩ 12,000
Book value [Abstract]
Book value		₩ 10,435		₩ 10,864		11,191
HORUS SOLAR, S.A. DE C.V.
Disclosure of joint ventures [line items]
Key operation activities		Renewable power generation	[10]	Renewable power generation	[11]
Location		Mexico	[10]	Mexico	[11]
Percentage of ownership		14.95%	[10]	14.95%	[11]
Acquisition cost		₩ 5,068	[10]	₩ 5,068	[11]
Book value [Abstract]
Book value		₩ 11,181	[10]	₩ 6,976	[11]	5,842
RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V.
Disclosure of joint ventures [line items]
Key operation activities		Renewable power generation	[10]	Renewable power generation	[11]
Location		Mexico	[10]	Mexico	[11]
Percentage of ownership		14.95%	[10]	14.95%	[11]
Acquisition cost		₩ 3,678	[10]	₩ 3,678	[11]
Book value [Abstract]
Book value		₩ 10,935	[10]	₩ 4,899	[11]	4,536
SUNMEX RENOVABLES, S.A. DE C.V.
Disclosure of joint ventures [line items]
Key operation activities		Renewable power generation	[10]	Renewable power generation	[11]
Location		Mexico	[10]	Mexico	[11]
Percentage of ownership		14.95%	[10]	14.95%	[11]
Acquisition cost		₩ 1,678	[10]	₩ 1,678	[11]
Book value [Abstract]
Book value		₩ 3,541	[10]	₩ 1,657	[11]	1,610
Stavro Holding II A.B.
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company
Location		Sweden		Sweden
Percentage of ownership		20%		20%
Acquisition cost		₩ 18,566		₩ 18,566
Book value [Abstract]
Book value		₩ 18,263		₩ 17,171		17,627
Solaseado Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		39%		39%
Acquisition cost		₩ 7,020		₩ 7,020
Book value [Abstract]
Book value		₩ 17,953		₩ 16,233		9,891
Yeongam Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	19%		19%
Acquisition cost	[5]	₩ 6,460		₩ 6,460
Book value [Abstract]
Book value		₩ 9,637	[5]	₩ 9,879	[5]	6,838
Samsu Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	19%		19%
Acquisition cost	[5]	₩ 2,637		₩ 2,637
Book value [Abstract]
Book value		₩ 3,022	[5]	₩ 3,205	[5]	2,828
Pulau Indah Power Plant Sdn. Bhd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Malaysia		Malaysia
Percentage of ownership		25%		25%
Acquisition cost		₩ 24,339		₩ 23,833
Book value [Abstract]
Book value		₩ 25,603		₩ 26,814		22,099
NH-Amundi Global Infrastructure Investment Private Investment Trust 21
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company
Location		Korea		Korea
Percentage of ownership		29.53%		29.53%
Acquisition cost		₩ 19,897		₩ 20,061
Book value [Abstract]
Book value		₩ 21,897		₩ 21,723		21,456
Shin-han BNPP Private Investment Trust for East-West Sunlight Dream
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company	[1]
Location		Korea		Korea	[1]
Percentage of ownership		90%		90%	[1]
Acquisition cost		₩ 14,916		₩ 15,012	[1]
Book value [Abstract]
Book value		₩ 15,487		₩ 15,587	[1]	16,288
PT Barito Wahana Tenaga
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Indonesia		Indonesia
Percentage of ownership		30.61%		30.61%
Acquisition cost		₩ 59,574		₩ 59,574
Book value [Abstract]
Book value		₩ 156,994		₩ 137,047		81,595
Cheongna Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Generating and distributing vapor and hot/cold water		Generating and distributing vapor and hot/cold water	[9]
Location		Korea		Korea	[9]
Percentage of ownership		50.10%		50.10%	[9]
Acquisition cost		₩ 49,344		₩ 49,344	[9]
Book value [Abstract]
Book value		₩ 25,549		₩ 10,758	[9]	11,198
Naepo Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29.20%		29.20%
Acquisition cost		₩ 29,200		₩ 29,200
Book value [Abstract]
Book value		₩ 5,285		₩ 0		0
Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Disclosure of joint ventures [line items]
Key operation activities		Power generation	[12]	Power generation	[13]
Location		Korea	[12]	Korea	[13]
Percentage of ownership		30.66%	[12]	30.66%	[13]
Acquisition cost		₩ 71,070	[12]	₩ 71,070	[13]
Book value [Abstract]
Book value		₩ 0	[12]	₩ 0	[13]	0
OneEnergy Asia Limited
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Vietnam		Vietnam
Percentage of ownership		40%		40%
Acquisition cost		₩ 195,130		₩ 115,949
Book value [Abstract]
Book value		₩ 289,966		₩ 172,218		79,700
KAS INVESTMENT I LLC
Disclosure of joint ventures [line items]
Key operation activities	[2]	Holding company		Holding company
Location	[2]	USA		USA
Percentage of ownership	[2]	29.89%		29.89%
Acquisition cost	[2]	₩ 23,437		₩ 23,437
Book value [Abstract]
Book value		₩ 15,784	[2]	₩ 18,247	[2]	15,273
KAS INVESTMENT II LLC
Disclosure of joint ventures [line items]
Key operation activities	[2]	Holding company		Holding company
Location	[2]	USA		USA
Percentage of ownership	[2]	29.89%		29.89%
Acquisition cost	[2]	₩ 23,343		₩ 23,343
Book value [Abstract]
Book value		₩ 15,709	[2]	₩ 18,173	[2]	15,213
Energyco Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 1,659		₩ 1,659
Book value [Abstract]
Book value		₩ 2,140		₩ 2,190		1,535
CAES, LLC
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company
Location		USA		USA
Percentage of ownership		36%		36%
Acquisition cost		₩ 19,414		₩ 19,414
Book value [Abstract]
Book value		₩ 20,380		₩ 20,805		18,435
Hapcheon Floating Photovoltaic Power Plant Inc.
Disclosure of joint ventures [line items]
Key operation activities	[5]	Power generation		Power generation
Location	[5]	Korea		Korea
Percentage of ownership	[5]	49%		49%
Acquisition cost	[5]	₩ 7,512		₩ 7,512
Book value [Abstract]
Book value		₩ 10,348	[5]	₩ 8,471	[5]	6,971
Busan Industrial Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		28.02%		28.02%
Acquisition cost		₩ 510		₩ 510
Book value [Abstract]
Book value		₩ 1,058		₩ 1,168		612
Bitsolar Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		27.10%		27.10%
Acquisition cost		₩ 352		₩ 352
Book value [Abstract]
Book value		₩ 352		₩ 352		352
Pulau Indah O&M Sdn. Bhd.
Disclosure of joint ventures [line items]
Key operation activities	[9]	Power generation		Power generation
Location	[9]	Malaysia		Malaysia
Percentage of ownership	[9]	60%		60%
Acquisition cost	[9]	₩ 0		₩ 0
Book value [Abstract]
Book value	[9]	₩ 0		₩ 0
Guadalupe Solar SpA
Disclosure of joint ventures [line items]
Key operation activities	[9]	Power generation		Power generation
Location	[9]	Chile		Chile
Percentage of ownership	[9]	60%		60%
Acquisition cost	[9]	₩ 1,397		₩ 1,397
Book value [Abstract]
Book value		₩ 1,200	[9]	₩ 913	[9]	659
Omisan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		42%		42%
Acquisition cost		₩ 10,752		₩ 10,752
Book value [Abstract]
Book value		₩ 10,229		₩ 10,411		10,633
Foresight Iberian Solar Group Holding, S.L.
Disclosure of joint ventures [line items]
Key operation activities	[9]	Power generation		Power generation
Location	[9]	Spain		Spain
Percentage of ownership	[9]	75%		75%
Acquisition cost	[9]	₩ 10,564		₩ 11,465
Book value [Abstract]
Book value	[9]	₩ 8,119		₩ 10,565
Yeongwol Eco Wind Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 3,089		₩ 3,089
Book value [Abstract]
Book value		₩ 4,024		₩ 3,155		3,196
Gurae Resident Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 386		₩ 386
Book value [Abstract]
Book value		₩ 569		₩ 391		395
Cheongju Eco Park Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 5,858		₩ 5,858
Book value [Abstract]
Book value		₩ 9,072		₩ 10,490		5,465
Enel X Midland Photovoltaic, LLC
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		20%		20%
Acquisition cost		₩ 2,211		₩ 1,695
Book value [Abstract]
Book value		₩ 2,542		₩ 1,856		1,688
Geumsungsan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 6,531		₩ 6,531
Book value [Abstract]
Book value		₩ 5,515		₩ 3,493		6,053
KEPCO KPS CARABAO Corp.
Disclosure of joint ventures [line items]
Key operation activities		Utility plant maintenance		Utility plant maintenance	[14]
Location		Philippines		Philippines	[14]
Percentage of ownership		40%		40%	[14]
Acquisition cost		₩ 93		₩ 93	[14]
Book value [Abstract]
Book value		₩ 0		₩ 177	[14]	386
Prime Swedish Holding AB
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company
Location		Sweden		Sweden
Percentage of ownership		45%		45%
Acquisition cost		₩ 36,227		₩ 35,410
Book value [Abstract]
Book value		₩ 38,789		₩ 36,245		15,441
Goheung New Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		46.15%		46.15%
Acquisition cost		₩ 12,959		₩ 12,959
Book value [Abstract]
Book value		₩ 15,736		₩ 11,832		11,708
Gunsan Land Solar Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities	[9]	Power generation	[15]	Power generation
Location	[9]	Korea	[15]	Korea
Percentage of ownership	[9]	75.29%	[15]	75.29%
Acquisition cost	[9]	₩ 19,091	[15]	₩ 19,091
Book value [Abstract]
Book value		₩ 22,429	[9],[15]	₩ 27,544	[9]	19,317
Capman Lynx SCA, SICAR
Disclosure of joint ventures [line items]
Key operation activities		Holding company		Holding company
Location		Luxembourg		Luxembourg
Percentage of ownership		50%		50%
Acquisition cost		₩ 9,601		₩ 9,601
Book value [Abstract]
Book value		₩ 0		₩ 0		9,976
International Offshore Power Transmission Holding Company Limited
Disclosure of joint ventures [line items]
Key operation activities		Undersea transmission network operation		Undersea transmission network operation
Location		UAE		UAE
Percentage of ownership		35%		35%
Acquisition cost		₩ 0		₩ 0
Book value [Abstract]
Book value		₩ 1,423		₩ 0		0
Pyeongchang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation	[16]	Power generation	[17]
Location		Korea	[16]	Korea	[17]
Percentage of ownership		58%	[16]	58%	[17]
Acquisition cost		₩ 9,329	[16]	₩ 9,329	[17]
Book value [Abstract]
Book value		₩ 12,228	[16]	₩ 14,464	[17]	0
Eumseong Eco Park Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		29%		29%
Acquisition cost		₩ 5,741		₩ 5,741
Book value [Abstract]
Book value		8,386		₩ 5,557		0
Songsan Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities	[2]			Fuel cell generation
Location	[2]			Korea
Percentage of ownership	[2]			25%
Acquisition cost	[2]			₩ 1,400
Book value [Abstract]
Book value		₩ 0		₩ 1,387	[2]	0
Changwon Nu-ri Energy Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Fuel cell generation	[5]	Fuel cell generation	[2]
Location		Korea	[5]	Korea	[2]
Percentage of ownership		61%	[5]	33.33%	[2]
Acquisition cost		₩ 8,095	[5]	₩ 500	[2]
Book value [Abstract]
Book value		8,027	[5]	₩ 497	[2]	0
Hasami Wind Farm Corporation
Disclosure of joint ventures [line items]
Key operation activities				Power generation
Location				Korea
Percentage of ownership				29%
Acquisition cost				₩ 1,596
Book value [Abstract]
Book value		₩ 0		₩ 1,589		0
PungBack Wind Farm Corporation
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[18]
Location		Korea		Korea	[18]
Percentage of ownership		32.89%		32.89%	[18]
Acquisition cost		₩ 7,885		₩ 7,885	[18]
Book value [Abstract]
Book value		₩ 7,940		₩ 6,743	[18]	0
Trumbull Asset Management, LLC
Disclosure of joint ventures [line items]
Key operation activities	[16]	Holding company		Holding company
Location	[16]	USA		USA
Percentage of ownership	[16]	78%		78%
Acquisition cost	[16]	₩ 1		₩ 0
Book value [Abstract]
Book value		₩ 936	[16]	₩ 246	[16]	0
S-Power Chile SpA
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Chile		Chile
Percentage of ownership		50%		50%
Acquisition cost		₩ 127		₩ 127
Book value [Abstract]
Book value		₩ 64		₩ 127		0
Seungmun Green Energy
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation
Location		Korea		Korea
Percentage of ownership		33%		33%
Acquisition cost		₩ 8,973		₩ 8,973
Book value [Abstract]
Book value		₩ 9,757		₩ 9,054		0
Seobusambo highway photovoltaics Co., Ltd.
Disclosure of joint ventures [line items]
Key operation activities		Power generation		Power generation	[19]
Location		Korea		Korea	[19]
Percentage of ownership		80%		80%	[19]
Acquisition cost		₩ 3,020		₩ 3,020	[19]
Book value [Abstract]
Book value		₩ 3,580		3,066	[19]	₩ 0
Yangyang Suri Wind Power Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities	[2]	Power generation
Location	[2]	Korea
Percentage of ownership	[2]	29%
Acquisition cost	[2]	₩ 10,498
Book value [Abstract]
Book value		₩ 9,608	[2]	0
Taebaek Wind Power Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities	[20]	Power generation
Location	[20]	Korea
Percentage of ownership	[20]	60%
Acquisition cost	[20]	₩ 11,494
Book value [Abstract]
Book value	[20]	₩ 13,932
Jeonju Bio Green Energy Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities	[9]	Power generation
Location	[9]	Korea
Percentage of ownership	[9]	65%
Acquisition cost	[9]	₩ 3,250
Book value [Abstract]
Book value		₩ 3,195	[9]	0
Kumyang Eco Park Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities		Power generation
Location		Korea
Percentage of ownership		29%
Acquisition cost		₩ 3,663
Book value [Abstract]
Book value		₩ 3,663		0
Jeongeup Green Power Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities	[21]	Power generation
Location	[21]	Korea
Percentage of ownership	[21]	18.71%
Acquisition cost	[21]	₩ 1,560
Book value [Abstract]
Book value		₩ 1,560	[21]	0
Hadong Efactory Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities	[2]	Power generation
Location	[2]	Korea
Percentage of ownership	[2]	30%
Acquisition cost	[2]	₩ 350
Book value [Abstract]
Book value		₩ 349	[2]	0
Namyangju Combined Heat and Power Co Ltd [Member]
Disclosure of joint ventures [line items]
Key operation activities	[22]	Generating and distributing vapor and hot/cold water
Location	[22]	Korea
Percentage of ownership	[22]	55%
Acquisition cost	[22]	₩ 3,850
Book value [Abstract]
Book value		₩ 3,850	[22]	0
Wadi Noor Solar Power Company SAOC [Member]
Disclosure of joint ventures [line items]
Key operation activities		Power generation
Location		Oman
Percentage of ownership		50%
Acquisition cost		₩ 847
Book value [Abstract]
Book value		₩ 846		0
Fairhaven Energy Storage LLC [Member]
Disclosure of joint ventures [line items]
Key operation activities	[23]	Power generation
Location	[23]	USA
Percentage of ownership	[23]	35%
Acquisition cost	[23]	₩ 0
Book value [Abstract]
Book value		₩ 0	[23]	0
KEPCO for Power Company [Member]
Disclosure of joint ventures [line items]
Key operation activities	[24]	Power generation
Location	[24]	Saudi arabia
Percentage of ownership	[24]	60%
Acquisition cost	[24]	₩ 3,083
Book value [Abstract]
Book value		₩ 435	[24]	₩ 0
[1]The effective percentage of ownership is more than 50%. However, according to the shareholders’ agreement, all critical financial and operating decisions must be agreed to by all ownership parties and the Company can exercise same voting rights as other shareholders at the board of directors. Accordingly, the entities are classified as joint ventures.[2]The effective percentage of ownership is less than 50%. However, the entity is classified as a joint venture, because all consent was required to make decisions on related activities.[3]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.[4]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.[5]According to the shareholders’ agreement, the parties have joint control over all decisions related to finance and operation. Accordingly, the entity is classified as joint ventures.[6]The effective percentage of ownership increased due to the disproportionate capital reduction of financial investors during the year ended December 31, 2022.[7]The effective percentage of ownership is less than 20%. However, decisions in relevant activities must be agreed by ownership parties. Accordingly, the entity is classified as joint ventures.[8]Although the nominal percentage of ownership is 29%, the effective percentage of ownership is 54.24%, considering the interest of financial investors as a liability component.[9]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.[10]The percentage of effective ownership is more than 20%. However, according to the shareholders’ agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.[11]The effective percentage of ownership is less than 20%. However, according to the shareholders' agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the Company can exercise significant influence.[12]According to the REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.). Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders' agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture.[13]According to the Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders’ agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture.[14]The joint arrangement which the Company has joint control is structured through a separate company. The parties have joint control over the joint arrangement are classified as joint ventures, judging that they have rights to the net assets of the arrangement.[15]The nominal percentage of ownership is 75.29% and the effective percentage of ownership is 56.91%, as the Company has an obligation to provide excessive dividend income to Gunsan City when a certain rate of return defined in the shareholders’ agreement is met.[16]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture.[17]After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture.[18]The effective percentage of ownership is 37%, considering potential common stock.[19]Due to the changes in the agreement, the Company lost its control over the entity. Accordingly, the entity is reclassified to a joint venture from a subsidiary. Although the effective percentage of ownership is more than 50%, decisions in relevant activities must be agreed by all members of the board of directors.[20]Although the Company’s effective percentage of ownership is more than 50%, the entity is reclassified as a joint venture considering the minimum number of the entity’s board of directors’ members required to agree for making decision on material financial and operational policies, as the joint shareholders’ agreement changed during the year ended December 31, 2023.[21]Although the Company’s effective percentage of ownership is less than 20%, the entity is reclassified as a joint venture considering the Company can exercise significant influence on the entity due to the Company’s contractual right to appoint a director to the entity’s board of directors and the minimum number of the entity’s board of directors members required to agree for making decision on material financial and operational policies in accordance with the joint shareholders’ agreement .[22]Although the Company’s effective percentage of ownership is more than 50%, the entity is classified as a joint venture since the entity’s material financial and operational decisions require unanimous agreement of members in the board of directors.[23]Although the investment has not yet been paid, commitment to pay 35% of investment in the future has been made.[24]Although the Company’s effective percentage of ownership is more than 50%, the entity is reclassified as a joint venture since the entity’s material financial and operational decisions require unanimous agreement of members in the board of directors due to the shareholders’ agreement concluded during the year ended December 31, 2023.

Investments in Joint Ventures 2

Investments in Joint Ventures 2 (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Book value [Abstract]
Beginning balance		₩ 3,147,584		₩ 2,239,011
Acquisition		123,143		292,033
Disposal		(2,774)		(35,915)
Dividends received		(106,801)		(112,612)
Share of profit (loss)		260,677		246,705
Other comprehensive income (loss)		79,554		507,544
Others		(15,684)		10,818
Ending balance		3,485,699		3,147,584
Beginning balance		8,992,048		7,471,384
Acquisition		545,252		387,070
Disposal		(5,685)		(67,313)
Dividends received		(592,813)		(711,940)
Share of profit (loss)		595,056		1,338,293
Other comprehensive income (loss)		152,752		552,812
Others		(24,022)		21,742
Ending balance		9,662,588		8,992,048
KEPCO-Uhde Inc.
Book value [Abstract]
Beginning balance		17	[1]	58
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(10)		(43)
Other comprehensive income (loss)		0		0
Others		(7)		2
Ending balance		0		17	[1]
Shuweihat Asia Power Investment B.V.
Book value [Abstract]
Beginning balance		66,452		37,069
Acquisition		0		0
Disposal		0		0
Dividends received		(512)		(3,545)
Share of profit (loss)		(440)		(1,303)
Other comprehensive income (loss)		4,402		34,231
Others		0		0
Ending balance		69,902		66,452
Shuweihat Asia Operation & Maintenance Company
Book value [Abstract]
Beginning balance		1,631	[1]	1,380
Acquisition		0		0
Disposal		0		0
Dividends received		(1,077)		(995)
Share of profit (loss)		1,237		1,154
Other comprehensive income (loss)		27		92
Others		0		0
Ending balance		1,818		1,631	[1]
Waterbury Lake Uranium L.P.
Book value [Abstract]
Beginning balance		21,750	[2]	21,590
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		70		1
Other comprehensive income (loss)		792		159
Others		0		0
Ending balance	[2]	22,612		21,750
ASM-BG Investicii AD
Book value [Abstract]
Beginning balance		14,555		18,692
Acquisition		0		0
Disposal		0		(6,255)
Dividends received		(697)		(2,395)
Share of profit (loss)		680		2,979
Other comprehensive income (loss)		201		1,534
Others		0		0
Ending balance		14,739		14,555
RES Technology AD
Book value [Abstract]
Beginning balance		15,133		16,703
Acquisition		0		0
Disposal		0		(3,673)
Dividends received		(697)		(333)
Share of profit (loss)		(513)		1,427
Other comprehensive income (loss)		460		1,009
Others		0		0
Ending balance		14,383		15,133
KV Holdings, Inc.
Book value [Abstract]
Beginning balance		9,659	[3]	2,527
Acquisition		0		0
Disposal		0		0
Dividends received		0		(394)
Share of profit (loss)		280		7,747
Other comprehensive income (loss)		161		(221)
Others		(4,914)		0
Ending balance		5,186		9,659	[3]
KEPCO SPC Power Corporation
Book value [Abstract]
Beginning balance		179,594	[3]	198,979
Acquisition		0		0
Disposal		0		0
Dividends received		0		(34,280)
Share of profit (loss)		13,224		27,591
Other comprehensive income (loss)		3,726		(12,696)
Others		0		0
Ending balance		196,544	[1],[4]	179,594	[3]
Gansu Datang Yumen Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		6,024		6,635
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		316		(464)
Other comprehensive income (loss)		(25)		(147)
Others		0		0
Ending balance		6,315		6,024
Datang Chifeng Renewable Power Co., Ltd.
Book value [Abstract]
Beginning balance		191,982		204,587
Acquisition		0		0
Disposal		0		0
Dividends received		(14,293)		(8,732)
Share of profit (loss)		9,012		2,849
Other comprehensive income (loss)		38		(6,722)
Others		0		0
Ending balance		186,739		191,982
Datang KEPCO Chaoyang Renewable Power Co., Ltd.
Book value [Abstract]
Beginning balance		44,398		44,217
Acquisition		0		0
Disposal		0		0
Dividends received		(1,771)		(2,694)
Share of profit (loss)		639		3,936
Other comprehensive income (loss)		(59)		(1,061)
Others		0		0
Ending balance		43,207		44,398
Rabigh Electricity Company
Book value [Abstract]
Beginning balance		214,607		143,678
Acquisition		0		0
Disposal		0		0
Dividends received		(6,263)		(11,447)
Share of profit (loss)		28,456		31,523
Other comprehensive income (loss)		(1,749)		50,853
Others		0		0
Ending balance		235,051		214,607
Rabigh Operation & Maintenance Company Limited
Book value [Abstract]
Beginning balance		5,113		4,071
Acquisition		0		0
Disposal		0		0
Dividends received		(2,994)		(2,735)
Share of profit (loss)		2,759		3,866
Other comprehensive income (loss)		86		(89)
Others		0		0
Ending balance		4,964		5,113
Jamaica Public Service Company Limited
Book value [Abstract]
Beginning balance		331,407		294,649
Acquisition		0		0
Disposal		0		0
Dividends received		(15,715)		(7,752)
Share of profit (loss)		32,862		28,541
Other comprehensive income (loss)		7,959		19,494
Others		(6,647)		(3,525)
Ending balance		349,866		331,407
KW Nuclear Components Co., Ltd.
Book value [Abstract]
Beginning balance		17,090		15,734
Acquisition		0		0
Disposal		0		0
Dividends received		(833)		(833)
Share of profit (loss)		2,423		2,189
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		18,680		17,090
Busan Shinho Solar Power Co., Ltd.
Book value [Abstract]
Beginning balance		6,719		5,841
Acquisition		0		0
Disposal		0		0
Dividends received		(1,169)		(478)
Share of profit (loss)		1,119		1,356
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		6,669		6,719
Global Trade Of Power System Co., Ltd.
Book value [Abstract]
Beginning balance		698	[5]	597
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(83)		101
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		615		698	[5]
Expressway Solar-light Power Generation Co., Ltd.
Book value [Abstract]
Beginning balance		4,754	[6]	3,084
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		433		1,670
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		5,187		4,754	[6]
Amman Asia Electric Power Company
Book value [Abstract]
Beginning balance		220,254	[1]	178,679
Acquisition		0		0
Disposal		0		0
Dividends received		(15,636)		(19,350)
Share of profit (loss)		17,833		23,442
Other comprehensive income (loss)		973		37,483
Others		0		0
Ending balance		223,424		220,254	[1]
KAPES, Inc.
Book value [Abstract]
Beginning balance		0	[1]	0
Acquisition		0		0
Disposal		0		0
Dividends received		(1,162)		0
Share of profit (loss)		1,162		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0	[1]
Honam Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		4,819		4,041
Acquisition		0		0
Disposal		0		0
Dividends received		(522)		(174)
Share of profit (loss)		446		952
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		4,743		4,819
Korea Power Engineering Service Co., Ltd.
Book value [Abstract]
Beginning balance		5,543		5,415
Acquisition		0		0
Disposal		0		0
Dividends received		(44)		(86)
Share of profit (loss)		349		145
Other comprehensive income (loss)		0		0
Others		(140)		69
Ending balance		5,708		5,543
Chun-cheon Energy Co., Ltd.
Book value [Abstract]
Beginning balance		32,044		25,896
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		3,039		6,148
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		35,083		32,044
Yeonggwangbaeksu Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		3,151	[5]	2,728
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		292		423
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		3,443		3,151	[5]
Nghi Son 2 Power LLC
Book value [Abstract]
Beginning balance		408,839		0
Acquisition		0		172,480
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		14,742		51,218
Other comprehensive income (loss)		(5,592)		185,141
Others		0		0
Ending balance		417,989		408,839
Kelar S.A
Book value [Abstract]
Beginning balance		117,137	[1]	86,695
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		11,655		3,695
Other comprehensive income (loss)		848		21,241
Others		1,889		5,506
Ending balance		131,529		117,137	[1]
PT. Tanjung Power Indonesia
Book value [Abstract]
Beginning balance		92,907		46,546
Acquisition		0		30,147
Disposal		0		0
Dividends received		(12,641)		(6,104)
Share of profit (loss)		9,679		4,645
Other comprehensive income (loss)		338		18,323
Others		(132)		(650)
Ending balance		90,151		92,907
Incheon New Power Co., Ltd.
Book value [Abstract]
Beginning balance		198	[2]	0
Acquisition		0		0
Disposal		0		0
Dividends received		(69)		0
Share of profit (loss)		147		198
Other comprehensive income (loss)		0		0
Others		22		0
Ending balance		298		198	[2]
Seokmun Energy Co., Ltd.
Book value [Abstract]
Beginning balance		17,336		13,842
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(745)		3,494
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		16,591		17,336
Daehan Wind Power PSC
Book value [Abstract]
Beginning balance		13,923		5,154
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		2,437		2,446
Other comprehensive income (loss)		66		6,323
Others		0		0
Ending balance		16,426		13,923
Barakah One Company
Book value [Abstract]
Beginning balance		0	[7]	0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[7]	0		0
Nawah Energy Company
Book value [Abstract]
Beginning balance		315	[7]	294
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		10		1
Other comprehensive income (loss)		5		20
Others		0		0
Ending balance	[7]	330		315
Momentum
Book value [Abstract]
Beginning balance		345		368
Acquisition		0		0
Disposal		0		0
Dividends received		(365)		(369)
Share of profit (loss)		208		345
Other comprehensive income (loss)		21		1
Others		0		0
Ending balance		209		345
Daegu Green Power Co., Ltd.
Book value [Abstract]
Beginning balance		29,360	[8]	24,054
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(2,856)		5,079
Other comprehensive income (loss)		0		0
Others		(74)		227
Ending balance		26,430		29,360	[8]
Yeonggwang Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		20,713		17,646
Acquisition		0		0
Disposal		0		0
Dividends received		(2,688)		0
Share of profit (loss)		5,355		3,067
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		23,380		20,713
Chester Solar IV SpA
Book value [Abstract]
Beginning balance		181		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		324		202
Other comprehensive income (loss)		(21)		(17)
Others		0		(4)
Ending balance		484		181
Chester Solar V SpA
Book value [Abstract]
Beginning balance		156		25
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		35		129
Other comprehensive income (loss)		(3)		3
Others		3		(1)
Ending balance		191		156
Diego de Almagro Solar SpA
Book value [Abstract]
Beginning balance		540		362
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		447		154
Other comprehensive income (loss)		(37)		2
Others		4		22
Ending balance		954		540
South Jamaica Power Company Limited
Book value [Abstract]
Beginning balance		46,437		37,360
Acquisition		0		0
Disposal		0		0
Dividends received		(7,667)		0
Share of profit (loss)		3,709		6,625
Other comprehensive income (loss)		630		2,452
Others		0		0
Ending balance		43,109		46,437
Daesan Green Energy Co., Ltd.
Book value [Abstract]
Beginning balance		19,218		21,244
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		2,977		(2,030)
Other comprehensive income (loss)		0		0
Others		(4)		4
Ending balance		22,191		19,218
RE Holiday Holdings LLC
Book value [Abstract]
Beginning balance		85,370		73,167
Acquisition		0		0
Disposal		0		0
Dividends received		(1,549)		(2,288)
Share of profit (loss)		(1,425)		2,526
Other comprehensive income (loss)		1,696		11,965
Others		0		0
Ending balance		84,092		85,370
RE Pioneer Holdings LLC
Book value [Abstract]
Beginning balance		55,172		47,015
Acquisition		0		0
Disposal		0		0
Dividends received		(1,162)		(1,337)
Share of profit (loss)		(2,089)		(275)
Other comprehensive income (loss)		2,160		9,769
Others		0		0
Ending balance		54,081		55,172
RE Barren Ridge 1 Holdings LLC
Book value [Abstract]
Beginning balance		3,350		1,883
Acquisition		0		0
Disposal		0		0
Dividends received		(3,087)		(1,625)
Share of profit (loss)		(1,733)		(2,886)
Other comprehensive income (loss)		59,624		5,978
Others		0		0
Ending balance		58,154		3,350
RE Astoria 2 LandCo LLC
Book value [Abstract]
Beginning balance		6,599		5,998
Acquisition		0		0
Disposal		0		0
Dividends received		(354)		(388)
Share of profit (loss)		575		571
Other comprehensive income (loss)		117		418
Others		0		0
Ending balance		6,937		6,599
RE Barren Ridge LandCo LLC
Book value [Abstract]
Beginning balance		2,333		2,120
Acquisition		0		0
Disposal		0		0
Dividends received		(161)		(160)
Share of profit (loss)		228		225
Other comprehensive income (loss)		41		148
Others		0		0
Ending balance		2,441		2,333
Laurel SpA
Book value [Abstract]
Beginning balance		554		290
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		64		245
Other comprehensive income (loss)		(14)		3
Others		9		16
Ending balance		613		554
KIAMCO KOWEPO Bannerton Hold Co Pty Ltd
Book value [Abstract]
Beginning balance		3,651	[5]	3,625
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(23)		26
Other comprehensive income (loss)		91		0
Others		0		0
Ending balance		3,719		3,651	[5]
Chile Solar JV SpA
Book value [Abstract]
Beginning balance		9,819		32,457
Acquisition		0		0
Disposal		0		(24,894)
Dividends received		0		0
Share of profit (loss)		3,569		159
Other comprehensive income (loss)		1,276		2,097
Others		(14,664)		0
Ending balance		0		9,819
Cheong-Song Noraesan Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		4,263	[2]	4,106
Acquisition		0		0
Disposal		0		0
Dividends received		(865)		(672)
Share of profit (loss)		358		832
Other comprehensive income (loss)		0		0
Others		0		(3)
Ending balance	[2]	3,756		4,263
Chester Solar I SpA
Book value [Abstract]
Beginning balance		1,314		1,120
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(71)		120
Other comprehensive income (loss)		(29)		(1)
Others		24		75
Ending balance		1,238		1,314
Solar Philippines Calatagan Corporation
Book value [Abstract]
Beginning balance		56,902		58,231
Acquisition		0		0
Disposal		0		0
Dividends received		(6,025)		(1,710)
Share of profit (loss)		6,025		6,081
Other comprehensive income (loss)		1,228		(5,700)
Others		0		0
Ending balance		58,130		56,902
Saemangeum Solar Power Co., Ltd.
Book value [Abstract]
Beginning balance		23,551	[9]	23,939
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(132)		(388)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		23,419		23,551	[9]
Chungsongmeon BongSan wind power Co., Ltd.
Book value [Abstract]
Beginning balance		3,470	[5]	3,808
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(805)		(338)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,665		3,470	[5]
Jaeun Resident Wind Power Plant Co., Ltd.
Book value [Abstract]
Beginning balance		2,236	[5]	1,958
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(22)		278
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[5]	2,214		2,236
DE Energia SpA
Book value [Abstract]
Beginning balance		9,536		8,921
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		167		615
Others		0		0
Ending balance		9,703		9,536
Dangjin Eco Power Co., Ltd.
Book value [Abstract]
Beginning balance		26,859		26,109
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		212		233
Other comprehensive income (loss)		(318)		513
Others		0		4
Ending balance		26,753		26,859
Haemodum Solar Co., Ltd.
Book value [Abstract]
Beginning balance		3,367		3,081
Acquisition		0		0
Disposal		0		0
Dividends received		(392)		0
Share of profit (loss)		147		286
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		3,122		3,367
Yangyang Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		10,864		11,191
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(429)		(327)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		10,435		10,864
Horus Solar, S.A. De C.V.
Book value [Abstract]
Beginning balance		6,976	[10]	5,842
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		3,594		841
Other comprehensive income (loss)		611		293
Others		0		0
Ending balance		11,181	[11]	6,976	[10]
Recursos Solares PV De Mexico II, S.A. De C.V.
Book value [Abstract]
Beginning balance		4,899	[10]	4,536
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		4,088		68
Other comprehensive income (loss)		1,948		295
Others		0		0
Ending balance		10,935	[11]	4,899	[10]
Sunmex Renovables, S.A. De C.V.
Book value [Abstract]
Beginning balance		1,657	[10]	1,610
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		1,482		(151)
Other comprehensive income (loss)		402		198
Others		0		0
Ending balance		3,541	[11]	1,657	[10]
Stavro Holding II A.B.
Book value [Abstract]
Beginning balance		17,171		17,627
Acquisition		0		952
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(17)		157
Other comprehensive income (loss)		149		(1,687)
Others		960		122
Ending balance		18,263		17,171
Solaseado Solar Power Co., Ltd.
Book value [Abstract]
Beginning balance		16,233		9,891
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		1,720		6,342
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		17,953		16,233
Yeongam Solar Power Co., Ltd.
Book value [Abstract]
Beginning balance		9,879	[5]	6,838
Acquisition		0		0
Disposal		0		0
Dividends received		(592)		0
Share of profit (loss)		350		3,041
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[5]	9,637		9,879
Samsu Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		3,205	[5]	2,828
Acquisition		0		0
Disposal		0		0
Dividends received		(514)		0
Share of profit (loss)		331		377
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[5]	3,022		3,205
Pulau Indah Power Plant Sdn. Bhd.
Book value [Abstract]
Beginning balance		26,814		22,099
Acquisition		0		0
Disposal		0		0
Dividends received		(27)		0
Share of profit (loss)		671		1,681
Other comprehensive income (loss)		(2,360)		3,034
Others		505		0
Ending balance		25,603		26,814
Sam-Yang Photovoltaic Power Co., Ltd.
Book value [Abstract]
Beginning balance		0		4,993
Acquisition				0
Disposal				0
Dividends received				0
Share of profit (loss)				(123)
Other comprehensive income (loss)				0
Others				(4,870)
Ending balance				0
NH-Amundi Global Infrastructure Investment Private Investment Trust 21
Book value [Abstract]
Beginning balance		21,723		21,456
Acquisition		928		485
Disposal		(1,092)		(406)
Dividends received		(1,568)		(1,415)
Share of profit (loss)		1,906		1,603
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		21,897		21,723
Shin-han BNPP Private Investment Trust for East-West Sunlight Dream
Book value [Abstract]
Beginning balance		15,587	[1]	16,288
Acquisition		0		0
Disposal		(96)		(687)
Dividends received		0		0
Share of profit (loss)		(4)		(14)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		15,487		15,587	[1]
PT Barito Wahana Tenaga
Book value [Abstract]
Beginning balance		137,047		81,595
Acquisition		0		39
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		20,546		13,352
Other comprehensive income (loss)		(599)		42,061
Others		0		0
Ending balance		156,994		137,047
Cheongna Energy Co., Ltd.
Book value [Abstract]
Beginning balance		10,758	[9]	11,198
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		14,791		(440)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		25,549		10,758	[9]
Naepo Green Energy Co., Ltd.
Book value [Abstract]
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		5,285		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		5,285		0
Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Book value [Abstract]
Beginning balance		0	[12]	0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0	[13]	0	[12]
OneEnergy Asia Limited
Book value [Abstract]
Beginning balance		172,218		79,700
Acquisition		79,182		39,033
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		39,091		(18,294)
Other comprehensive income (loss)		(525)		71,779
Others		0		0
Ending balance		289,966		172,218
KAS Investment I LLC
Book value [Abstract]
Beginning balance		18,247	[2]	15,273
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(2,223)		2,426
Other comprehensive income (loss)		(240)		548
Others		0		0
Ending balance	[2]	15,784		18,247
KAS Investment II LLC
Book value [Abstract]
Beginning balance		18,173	[2]	15,213
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(2,225)		2,082
Other comprehensive income (loss)		(239)		878
Others		0		0
Ending balance	[2]	15,709		18,173
Energyco Co., Ltd. (formerly, Energyco LLC)
Book value [Abstract]
Beginning balance		2,190		1,535
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(50)		655
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,140		2,190
CAES, LLC
Book value [Abstract]
Beginning balance		20,805		18,435
Acquisition		0		0
Disposal		0		0
Dividends received		0		(217)
Share of profit (loss)		(860)		(198)
Other comprehensive income (loss)		114		1,756
Others		321		1,029
Ending balance		20,380		20,805
Hapcheon Floating Photovoltaic Power Plant Inc.
Book value [Abstract]
Beginning balance		8,471	[5]	6,971
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		1,877		1,500
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance	[5]	10,348		8,471
Busan Industrial Solar Power Co., Ltd.
Book value [Abstract]
Beginning balance		1,168		612
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(110)		556
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		1,058		1,168
Bitsolar Energy Co., Ltd.
Book value [Abstract]
Beginning balance		352		352
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		352		352
Pulau Indah O&M Sdn. Bhd.
Book value [Abstract]
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		0
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		0
Guadalupe Solar SpA
Book value [Abstract]
Beginning balance		913	[9]	659
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		322		221
Other comprehensive income (loss)		(35)		33
Others		0		0
Ending balance	[9]	1,200		913
Omisan Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		10,411		10,633
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(182)		(222)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		10,229		10,411
Foresight Iberian Solar Group Holding, S.L.
Book value [Abstract]
Beginning balance		10,565		9,743
Acquisition		0		1,781
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(2,034)		(1,016)
Other comprehensive income (loss)		0		3
Others		(412)		54
Ending balance		8,119		10,565
Yeongwol Eco Wind Co., Ltd.
Book value [Abstract]
Beginning balance		3,155		3,196
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		869		(41)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		4,024		3,155
Gurae Resident Power Co., Ltd.
Book value [Abstract]
Beginning balance		391		395
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		178		(4)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		569		391
Cheongju Eco Park Co., Ltd.
Book value [Abstract]
Beginning balance		10,490		5,465
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(1,418)		5,025
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		9,072		10,490
Enel X Midland Photovoltaic, LLC
Book value [Abstract]
Beginning balance		1,856		1,688
Acquisition		516		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		170		168
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		2,542		1,856
Geumsungsan Wind Power Co., Ltd.
Book value [Abstract]
Beginning balance		3,493		6,053
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		2,022		(2,560)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		5,515		3,493
KEPCO KPS CARABAO Corp.
Book value [Abstract]
Beginning balance		177	[14]	386
Acquisition		0		0
Disposal		0		0
Dividends received		0		(104)
Share of profit (loss)		(184)		(105)
Other comprehensive income (loss)		7		0
Others		0		0
Ending balance		0		177	[14]
Prime Swedish Holding AB
Book value [Abstract]
Beginning balance		36,245		15,441
Acquisition		820		20,896
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(236)		(261)
Other comprehensive income (loss)		0		0
Others		1,960		169
Ending balance		38,789		36,245
Goheung New Energy Co., Ltd.
Book value [Abstract]
Beginning balance		11,832		11,708
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		3,904		124
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		15,736		11,832
Gunsan Land Solar Co., Ltd.
Book value [Abstract]
Beginning balance		27,544	[9]	19,317
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(5,115)		8,220
Other comprehensive income (loss)		0		7
Others		0		0
Ending balance	[9]	22,429	[15]	27,544
Capman Lynx SCA, SICAR
Book value [Abstract]
Beginning balance		0		9,976
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		0		(10,195)
Other comprehensive income (loss)		0		5,173
Others		0		(4,954)
Ending balance		0		0
International Offshore Power Transmission Holding Company Limited
Book value [Abstract]
Beginning balance		0		0
Acquisition		0		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		338		0
Other comprehensive income (loss)		1,085		0
Others		0		0
Ending balance		1,423		0
Pyeongchang Wind Power Co., Ltd
Book value [Abstract]
Beginning balance		14,464	[16]	0
Acquisition		0		0
Disposal		0		0
Dividends received		(870)		0
Share of profit (loss)		(1,366)		0
Other comprehensive income (loss)		0		0
Others		0		14,464
Ending balance		12,228	[17]	14,464	[16]
Eumseong Eco Park Co., Ltd
Book value [Abstract]
Beginning balance		5,557		0
Acquisition		0		5,741
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		2,829		(184)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		8,386		5,557
Songsan Green Energy Co., Ltd
Book value [Abstract]
Beginning balance		1,387	[2]	0
Acquisition		7,000		1,400
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(25)		(13)
Other comprehensive income (loss)		(39)		0
Others		(8,323)		0
Ending balance		0		1,387	[2]
Changwon Nu-ri Energy Co., Ltd
Book value [Abstract]
Beginning balance		497	[2]	0
Acquisition		7,595		500
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(27)		(3)
Other comprehensive income (loss)		(38)		0
Others		0		0
Ending balance		8,027	[5]	497	[2]
Hasami Wind Farm Corporation
Book value [Abstract]
Beginning balance		1,589		0
Acquisition		0		1,596
Disposal		(1,586)		0
Dividends received		0		0
Share of profit (loss)		(3)		(7)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		0		1,589
PungBack Wind Farm Corporation
Book value [Abstract]
Beginning balance		6,743	[18]	0
Acquisition		0		7,884
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		1,197		(1,141)
Other comprehensive income (loss)		0		0
Others		0		0
Ending balance		7,940		6,743	[18]
Trumbull Asset Management, LLC
Book value [Abstract]
Beginning balance		246	[17]	0
Acquisition		1		0
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		693		252
Other comprehensive income (loss)		0		(1)
Others		(4)		(5)
Ending balance	[17]	936		246
S-Power Chile SpA
Book value [Abstract]
Beginning balance		127		0
Acquisition		0		127
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		(70)		0
Other comprehensive income (loss)		4		0
Others		3		0
Ending balance		64		127
Seungmun Green Energy
Book value [Abstract]
Beginning balance		9,054		0
Acquisition		0		8,973
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		703		120
Other comprehensive income (loss)		0		(39)
Others		0		0
Ending balance		9,757		9,054
Seobusambo highway photovoltaics Co., Ltd
Book value [Abstract]
Beginning balance		3,066	[19]	0
Acquisition		0		(1)
Disposal		0		0
Dividends received		0		0
Share of profit (loss)		514		0
Other comprehensive income (loss)		0		0
Others		0		3,067
Ending balance		3,580		3,066	[19]
Yangyang Suri Wind Power Co Ltd [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		10,498
Disposal		0
Dividends received		0
Share of profit (loss)		(890)
Other comprehensive income (loss)		0
Others		0
Ending balance		9,608	[2]	0
KEPCO for Power Company [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		3,083
Disposal		0
Dividends received		0
Share of profit (loss)		(2,109)
Other comprehensive income (loss)		25
Others		(564)
Ending balance		435	[20]	0
Taebaek Wind Power Co., Ltd. [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		0
Disposal		0
Dividends received		(2,820)
Share of profit (loss)		2,251
Other comprehensive income (loss)		0
Others		14,501
Ending balance		13,932		0
Jeonju Bio Green Energy Co Ltd [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		3,250
Disposal		0
Dividends received		0
Share of profit (loss)		(55)
Other comprehensive income (loss)		0
Others		0
Ending balance		3,195	[9]	0
Kumyang Eco Park Co Ltd [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		3,663
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		0
Ending balance		3,663		0
Jeongeup Green Power Co Ltd [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		1,560
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		0
Ending balance		1,560	[21]	0
Hadong Efactory Co Ltd [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		350
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		(1)
Others		0
Ending balance		349	[2]	0
Namyangju Combined Heat and Power Co Ltd [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		3,850
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		0
Ending balance		3,850	[22]	0
Wadi Noor Solar Power Company SAOC [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		847
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		(1)
Others		0
Ending balance		846		0
Fairhaven Energy Storage LLC [Member]
Book value [Abstract]
Beginning balance		0
Acquisition		0
Disposal		0
Dividends received		0
Share of profit (loss)		0
Other comprehensive income (loss)		0
Others		0
Ending balance		₩ 0	[23]	₩ 0
[1]The effective percentage of ownership is more than 50%. However, according to the shareholders’ agreement, all critical financial and operating decisions must be agreed to by all ownership parties and the Company can exercise same voting rights as other shareholders at the board of directors. Accordingly, the entities are classified as joint ventures.[2]The effective percentage of ownership is less than 50%. However, the entity is classified as a joint venture, because all consent was required to make decisions on related activities.[3]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.[4]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.[5]According to the shareholders’ agreement, the parties have joint control over all decisions related to finance and operation. Accordingly, the entity is classified as joint ventures.[6]The effective percentage of ownership increased due to the disproportionate capital reduction of financial investors during the year ended December 31, 2022.[7]The effective percentage of ownership is less than 20%. However, decisions in relevant activities must be agreed by ownership parties. Accordingly, the entity is classified as joint ventures.[8]Although the nominal percentage of ownership is 29%, the effective percentage of ownership is 54.24%, considering the interest of financial investors as a liability component.[9]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.[10]The effective percentage of ownership is less than 20%. However, according to the shareholders' agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the Company can exercise significant influence.[11]The percentage of effective ownership is more than 20%. However, according to the shareholders’ agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.[12]According to the Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders’ agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture.[13]According to the REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.). Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders' agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture.[14]The joint arrangement which the Company has joint control is structured through a separate company. The parties have joint control over the joint arrangement are classified as joint ventures, judging that they have rights to the net assets of the arrangement.[15]The nominal percentage of ownership is 75.29% and the effective percentage of ownership is 56.91%, as the Company has an obligation to provide excessive dividend income to Gunsan City when a certain rate of return defined in the shareholders’ agreement is met.[16]After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture.[17]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture.[18]The effective percentage of ownership is 37%, considering potential common stock.[19]Due to the changes in the agreement, the Company lost its control over the entity. Accordingly, the entity is reclassified to a joint venture from a subsidiary. Although the effective percentage of ownership is more than 50%, decisions in relevant activities must be agreed by all members of the board of directors.[20]Although the Company’s effective percentage of ownership is more than 50%, the entity is reclassified as a joint venture since the entity’s material financial and operational decisions require unanimous agreement of members in the board of directors due to the shareholders’ agreement concluded during the year ended December 31, 2023.[21]Although the Company’s effective percentage of ownership is less than 20%, the entity is reclassified as a joint venture considering the Company can exercise significant influence on the entity due to the Company’s contractual right to appoint a director to the entity’s board of directors and the minimum number of the entity’s board of directors members required to agree for making decision on material financial and operational policies in accordance with the joint shareholders’ agreement .[22]Although the Company’s effective percentage of ownership is more than 50%, the entity is classified as a joint venture since the entity’s material financial and operational decisions require unanimous agreement of members in the board of directors.[23]Although the investment has not yet been paid, commitment to pay 35% of investment in the future has been made.

Investments in Joint Ventures 3

Investments in Joint Ventures 3 (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of joint ventures [line items]
Total assets	₩ 239,714,965	₩ 234,804,994
Total liabilities	202,450,215	192,804,738
Sales	87,476,410	70,546,024	₩ 60,012,375
Profit (loss) for the year	(4,716,144)	(24,429,108)	₩ (5,215,581)
KEPCO-Uhde Inc.
Disclosure of joint ventures [line items]
Total assets		48
Total liabilities		15
Sales		0
Profit (loss) for the year		(84)
Shuweihat Asia Power Investment B.V.
Disclosure of joint ventures [line items]
Total assets	142,680	135,646
Total liabilities	20	29
Sales	0	0
Profit (loss) for the year	897	(2,660)
Shuweihat Asia Operation & Maintenance Company
Disclosure of joint ventures [line items]
Total assets	4,421	3,037
Total liabilities	1,116	71
Sales	3,194	3,013
Profit (loss) for the year	2,249	2,099
Waterbury Lake Uranium L.P.
Disclosure of joint ventures [line items]
Total assets	74,320	66,706
Total liabilities	550	117
Sales	0	0
Profit (loss) for the year	0	0
ASM-BG Investicii AD
Disclosure of joint ventures [line items]
Total assets	68,837	72,999
Total liabilities	39,359	43,889
Sales	10,931	16,056
Profit (loss) for the year	1,359	6,230
RES Technology AD
Disclosure of joint ventures [line items]
Total assets	58,152	62,345
Total liabilities	29,387	32,079
Sales	5,969	11,205
Profit (loss) for the year	(1,027)	3,018
KV Holdings, Inc.
Disclosure of joint ventures [line items]
Total assets	12,968	24,149
Total liabilities	2	1
Sales	20	1
Profit (loss) for the year	367	353
KEPCO SPC Power Corporation
Disclosure of joint ventures [line items]
Total assets	288,140	267,904
Total liabilities	26,778	29,082
Sales	222,773	253,145
Profit (loss) for the year	17,270	44,751
Gansu Datang Yumen Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	61,657	67,651
Total liabilities	45,869	52,592
Sales	10,684	10,048
Profit (loss) for the year	791	(1,161)
Datang Chifeng Renewable Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	812,124	835,331
Total liabilities	345,277	355,377
Sales	117,833	140,343
Profit (loss) for the year	25,055	42,889
Datang KEPCO Chaoyang Renewable Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	166,959	168,680
Total liabilities	58,942	57,685
Sales	23,638	29,459
Profit (loss) for the year	1,597	4,919
Rabigh Electricity Company
Disclosure of joint ventures [line items]
Total assets	2,556,848	2,520,946
Total liabilities	1,855,234	1,855,836
Sales	304,727	322,108
Profit (loss) for the year	51,539	65,550
Rabigh Operation & Maintenance Company Limited
Disclosure of joint ventures [line items]
Total assets	40,339	23,664
Total liabilities	27,928	10,882
Sales	31,301	32,572
Profit (loss) for the year	6,676	9,176
Jamaica Public Service Company Limited
Disclosure of joint ventures [line items]
Total assets	2,332,019	2,310,611
Total liabilities	1,491,199	1,515,361
Sales	1,400,582	1,499,897
Profit (loss) for the year	87,307	69,458
KW Nuclear Components Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	42,363	40,381
Total liabilities	460	2,013
Sales	14,344	16,968
Profit (loss) for the year	5,386	6,755
Busan Shinho Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	31,863	36,868
Total liabilities	5,188	9,991
Sales	9,197	10,543
Profit (loss) for the year	4,473	5,424
Global Trade Of Power System Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	2,398	5,628
Total liabilities	277	3,222
Sales	2,044	8,434
Profit (loss) for the year	(229)	351
Expressway Solar-light Power Generation Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	13,065	14,248
Total liabilities	2,691	4,740
Sales	3,397	3,711
Profit (loss) for the year	892	1,654
Amman Asia Electric Power Company
Disclosure of joint ventures [line items]
Total assets	719,388	759,885
Total liabilities	347,015	392,795
Sales	21,772	28,665
Profit (loss) for the year	33,811	39,090
KAPES, Inc.
Disclosure of joint ventures [line items]
Total assets	203,066	82,943
Total liabilities	165,475	45,068
Sales	32,294	20,006
Profit (loss) for the year	2,150	3,797
Honam Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	31,183	34,028
Total liabilities	14,938	17,522
Sales	6,570	8,781
Profit (loss) for the year	1,540	3,283
Korea Power Engineering Service Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	21,534	20,931
Total liabilities	1,853	1,817
Sales	11,248	9,176
Profit (loss) for the year	1,203	500
Chun-cheon Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	565,972	629,202
Total liabilities	447,820	521,212
Sales	502,889	585,641
Profit (loss) for the year	10,435	19,940
Yeonggwangbaeksu Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	73,854	80,042
Total liabilities	50,936	59,070
Sales	13,523	14,150
Profit (loss) for the year	1,944	2,764
Nghi Son 2 Power LLC
Disclosure of joint ventures [line items]
Total assets	3,775,717	3,652,801
Total liabilities	2,939,740	2,835,123
Sales	825,701	589,023
Profit (loss) for the year	33,505	102,436
Kelar S.A
Disclosure of joint ventures [line items]
Total assets	691,104	689,802
Total liabilities	493,325	514,085
Sales	112,201	107,577
Profit (loss) for the year	12,488	943
PT. Tanjung Power Indonesia
Disclosure of joint ventures [line items]
Total assets	704,274	730,239
Total liabilities	446,700	464,791
Sales	111,138	99,169
Profit (loss) for the year	21,854	13,619
Incheon New Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	1,404	2,633
Total liabilities	377	755
Sales	3,781	4,497
Profit (loss) for the year	485	1,244
Seokmun Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	201,776	212,509
Total liabilities	144,565	152,731
Sales	54,575	61,513
Profit (loss) for the year	(1,581)	12,064
Daehan Wind Power PSC
Disclosure of joint ventures [line items]
Total assets	144,260	145,065
Total liabilities	111,407	117,219
Sales	17,880	17,958
Profit (loss) for the year	4,951	5,524
Barakah One Company
Disclosure of joint ventures [line items]
Total assets	35,586,640	33,587,352
Total liabilities	36,901,367	34,422,965
Sales	1,243,735	498,129
Profit (loss) for the year	(230,503)	(444,338)
Nawah Energy Company
Disclosure of joint ventures [line items]
Total assets	569,982	338,883
Total liabilities	568,147	337,134
Sales	555,338	395,580
Profit (loss) for the year	34	3
Momentum
Disclosure of joint ventures [line items]
Total assets	13,449	7,315
Total liabilities	12,821	6,280
Sales	23,160	30,864
Profit (loss) for the year	624	1,036
Daegu Green Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	515,354	551,431
Total liabilities	429,204	459,881
Sales	380,130	516,254
Profit (loss) for the year	(5,146)	9,364
Yeonggwang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	225,286	233,695
Total liabilities	175,530	189,737
Sales	36,326	31,221
Profit (loss) for the year	11,672	6,700
Chester Solar IV SpA
Disclosure of joint ventures [line items]
Total assets	12,435	12,728
Total liabilities	11,504	12,469
Sales	2,119	1,521
Profit (loss) for the year	395	(174)
Chester Solar V SpA
Disclosure of joint ventures [line items]
Total assets	4,124	4,364
Total liabilities	4,002	4,315
Sales	696	520
Profit (loss) for the year	141	83
Diego de Almagro Solar SpA
Disclosure of joint ventures [line items]
Total assets	15,785	15,908
Total liabilities	13,907	14,946
Sales	3,114	1,877
Profit (loss) for the year	931	(288)
South Jamaica Power Company Limited
Disclosure of joint ventures [line items]
Total assets	482,866	521,558
Total liabilities	267,307	289,359
Sales	240,664	314,064
Profit (loss) for the year	18,833	33,348
Daesan Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	237,663	245,826
Total liabilities	174,261	190,918
Sales	111,225	101,689
Profit (loss) for the year	11,480	(6,641)
RE Holiday Holdings LLC
Disclosure of joint ventures [line items]
Total assets	340,773	351,243
Total liabilities	172,589	180,503
Sales	21,178	22,671
Profit (loss) for the year	664	3,022
RE Pioneer Holdings LLC
Disclosure of joint ventures [line items]
Total assets	257,091	263,232
Total liabilities	148,929	152,888
Sales	14,136	15,701
Profit (loss) for the year	(2,164)	369
RE Barren Ridge 1 Holdings LLC
Disclosure of joint ventures [line items]
Total assets	213,491	226,504
Total liabilities	97,184	100,436
Sales	11,915	11,740
Profit (loss) for the year	(1,979)	(903)
RE Astoria 2 LandCo LLC
Disclosure of joint ventures [line items]
Total assets	14,116	13,517
Total liabilities	242	319
Sales	1,014	1,004
Profit (loss) for the year	823	913
RE Barren Ridge LandCo LLC
Disclosure of joint ventures [line items]
Total assets	4,980	4,761
Total liabilities	97	95
Sales	393	389
Profit (loss) for the year	329	357
Laurel SpA
Disclosure of joint ventures [line items]
Total assets	10,665	11,221
Total liabilities	9,768	10,447
Sales	1,646	1,424
Profit (loss) for the year	169	54
KIAMCO KOWEPO Bannerton Hold Co Pty Ltd
Disclosure of joint ventures [line items]
Total assets	30,081	29,517
Total liabilities	84	74
Sales	0	0
Profit (loss) for the year	(182)	(260)
Chile Solar JV SpA
Disclosure of joint ventures [line items]
Total assets		75,246
Total liabilities		55,609
Sales		7,842
Profit (loss) for the year		6,425
Cheong-Song Noraesan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	54,086	55,948
Total liabilities	41,352	41,464
Sales	6,780	7,988
Profit (loss) for the year	1,240	1,916
Chester Solar I SpA
Disclosure of joint ventures [line items]
Total assets	12,846	13,246
Total liabilities	10,712	10,933
Sales	1,620	1,094
Profit (loss) for the year	214	(221)
Solar Philippines Calatagan Corporation
Disclosure of joint ventures [line items]
Total assets	146,304	113,327
Total liabilities	37,922	36,756
Sales	16,420	17,728
Profit (loss) for the year	9,121	10,194
Saemangeum Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	34,905	35,890
Total liabilities	5,994	6,817
Sales	0	0
Profit (loss) for the year	(162)	(479)
Chungsongmeon BongSan wind power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	83,147	81,030
Total liabilities	80,102	75,207
Sales	0	0
Profit (loss) for the year	(925)	(1,120)
Jaeun Resident Wind Power Plant Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	95,529	89,756
Total liabilities	87,893	82,047
Sales	181	0
Profit (loss) for the year	(80)	(190)
DE Energia SpA
Disclosure of joint ventures [line items]
Total assets	28,017	48,350
Total liabilities	21,416	62,481
Sales	5,006	5,959
Profit (loss) for the year	21,118	(1,109)
Dangjin Eco Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	96,980	98,714
Total liabilities	19,299	20,721
Sales	3,789	4,185
Profit (loss) for the year	589	700
Haemodum Solar Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	21,612	22,974
Total liabilities	15,241	16,103
Sales	2,216	2,556
Profit (loss) for the year	299	581
Yangyang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	124,550	107,471
Total liabilities	103,766	85,829
Sales	211	0
Profit (loss) for the year	(858)	(634)
Horus Solar, S.A. De C.V.
Disclosure of joint ventures [line items]
Total assets	210,868	156,436
Total liabilities	160,006	133,714
Sales	20,586	5,568
Profit (loss) for the year	26,865	5,628
Recursos Solares PV De Mexico II, S.A. De C.V.
Disclosure of joint ventures [line items]
Total assets	239,548	173,262
Total liabilities	180,912	155,009
Sales	4,920	468
Profit (loss) for the year	24,984	457
Sunmex Renovables, S.A. De C.V.
Disclosure of joint ventures [line items]
Total assets	156,696	129,502
Total liabilities	133,032	118,449
Sales	0	0
Profit (loss) for the year	6,232	(1,008)
Stavro Holding II A.B.
Disclosure of joint ventures [line items]
Total assets	91,342	85,883
Total liabilities	28	27
Sales	0	0
Profit (loss) for the year	(87)	61
Solaseado Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	346,793	363,492
Total liabilities	304,142	325,262
Sales	39,907	51,198
Profit (loss) for the year	4,823	16,301
Yeongam Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	326,429	329,714
Total liabilities	279,779	281,791
Sales	35,280	44,568
Profit (loss) for the year	4,506	8,563
Samsu Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	67,150	71,123
Total liabilities	51,247	54,254
Sales	8,751	10,118
Profit (loss) for the year	1,741	1,987
Pulau Indah Power Plant Sdn. Bhd.
Disclosure of joint ventures [line items]
Total assets	800,300	760,536
Total liabilities	720,459	675,853
Sales	431	797
Profit (loss) for the year	2,095	6,723
NH-Amundi Global Infrastructure Investment Private Investment Trust 21
Disclosure of joint ventures [line items]
Total assets	72,465	71,851
Total liabilities	97	74
Sales	7,569	4,850
Profit (loss) for the year	7,080	5,431
Shin-han BNPP Private Investment Trust for East-West Sunlight Dream
Disclosure of joint ventures [line items]
Total assets	17,230	17,341
Total liabilities	22	22
Sales	38	38
Profit (loss) for the year	(3)	(10)
PT Barito Wahana Tenaga
Disclosure of joint ventures [line items]
Total assets	512,846	447,688
Total liabilities	0	0
Sales	0	0
Profit (loss) for the year	72,320	49,471
Cheongna Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	428,042	385,935
Total liabilities	380,935	368,340
Sales	119,530	100,200
Profit (loss) for the year	29,511	(889)
Naepo Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	695,684	448,309
Total liabilities	677,583	499,528
Sales	312,592	8,905
Profit (loss) for the year	53,343	(34,347)
Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Disclosure of joint ventures [line items]
Total assets	441,975	470,677
Total liabilities	498,353	530,304
Sales	212,997	278,363
Profit (loss) for the year	5,544	(12,893)
OneEnergy Asia Limited
Disclosure of joint ventures [line items]
Total assets	2,181,165	1,039,987
Total liabilities	1,520,032	673,223
Sales	1,149,944	0
Profit (loss) for the year	94,298	16,041
KAS Investment I LLC
Disclosure of joint ventures [line items]
Total assets	52,806	61,907
Total liabilities	0	861
Sales	(7,436)	1,603
Profit (loss) for the year	(7,437)	6,998
KAS Investment II LLC
Disclosure of joint ventures [line items]
Total assets	52,555	61,661
Total liabilities	1	861
Sales	(7,444)	1,592
Profit (loss) for the year	(7,445)	6,967
Energyco LLC
Disclosure of joint ventures [line items]
Total assets	54,336	56,996
Total liabilities	49,816	52,304
Sales	6,599	7,898
Profit (loss) for the year	(173)	2,258
CAES, LLC
Disclosure of joint ventures [line items]
Total assets	48,495	49,676
Total liabilities	5	6
Sales	0	0
Profit (loss) for the year	(2,388)	(547)
Hapcheon Floating Photovoltaic Power Plant Inc.
Disclosure of joint ventures [line items]
Total assets	79,924	78,768
Total liabilities	58,887	61,561
Sales	12,679	12,705
Profit (loss) for the year	4,266	3,061
Busan Industrial Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	18,636	21,149
Total liabilities	15,896	18,016
Sales	2,378	3,190
Profit (loss) for the year	106	901
Bitsolar Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	73,435	78,779
Total liabilities	79,367	83,324
Sales	8,249	9,557
Profit (loss) for the year	(1,125)	261
Pulau Indah O&M Sdn. Bhd.
Disclosure of joint ventures [line items]
Total assets	0	0
Total liabilities	0	0
Sales	0	0
Profit (loss) for the year	0	0
Guadalupe Solar SpA
Disclosure of joint ventures [line items]
Total assets	10,646	10,148
Total liabilities	8,811	8,790
Sales	1,684	924
Profit (loss) for the year	626	(43)
Omisan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	150,813	142,274
Total liabilities	126,853	117,881
Sales	0	0
Profit (loss) for the year	(453)	(519)
Foresight Iberian Solar Group Holding, S.L.
Disclosure of joint ventures [line items]
Total assets	94,972	94,181
Total liabilities	86,049	81,997
Sales	0	0
Profit (loss) for the year	(2,712)	(1,365)
Yeongwol Eco Wind Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	109,716	87,856
Total liabilities	102,143	83,281
Sales	3,561	0
Profit (loss) for the year	2,975	(144)
Gurae Resident Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	14,096	11,649
Total liabilities	12,299	10,467
Sales	652	0
Profit (loss) for the year	615	(19)
Cheongju Eco Park Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	145,956	152,139
Total liabilities	115,347	116,639
Sales	38,907	66,260
Profit (loss) for the year	(4,892)	17,319
Enel X Midland Photovoltaic, LLC
Disclosure of joint ventures [line items]
Total assets	12,825	10,289
Total liabilities	115	1,010
Sales	2,128	1,684
Profit (loss) for the year	850	837
Geumsungsan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	142,703	125,324
Total liabilities	125,602	115,196
Sales	13,568	0
Profit (loss) for the year	6,570	(1,770)
KEPCO KPS CARABAO Corp.
Disclosure of joint ventures [line items]
Total assets	375	2,025
Total liabilities	468	1,582
Sales	0	611
Profit (loss) for the year	(467)	(327)
Prime Swedish Holding AB
Disclosure of joint ventures [line items]
Total assets	83,699	77,942
Total liabilities	218	114
Sales	0	0
Profit (loss) for the year	(524)	(577)
Goheung New Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	177,924	136,682
Total liabilities	146,175	113,393
Sales	29,246	0
Profit (loss) for the year	8,460	(1,591)
Gunsan Land Solar Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	144,435	158,371
Total liabilities	108,848	121,785
Sales	23,523	28,828
Profit (loss) for the year	(974)	12,154
Capman Lynx SCA, SICAR
Disclosure of joint ventures [line items]
Total assets	139,262	112,718
Total liabilities	132,430	102,810
Sales	1,427	504
Profit (loss) for the year	(12,401)	(16,780)
International Offshore Power Transmission Holding Company Limited
Disclosure of joint ventures [line items]
Total assets	6,555	4,680
Total liabilities	2,486	71,468
Sales	0	0
Profit (loss) for the year	(195)	(68,093)
Pyeongchang Wind Power Co., Ltd
Disclosure of joint ventures [line items]
Total assets	60,535	70,599
Total liabilities	39,452	45,661
Sales	9,361	14,524
Profit (loss) for the year	(2,354)	3,693
Eumseong Eco Park Co., Ltd
Disclosure of joint ventures [line items]
Total assets	153,927	136,909
Total liabilities	126,998	119,736
Sales	46,679	0
Profit (loss) for the year	5,609	(636)
Songsan Green Energy Co., Ltd
Disclosure of joint ventures [line items]
Total assets		5,500
Total liabilities		0
Sales		0
Profit (loss) for the year		(69)
Changwon Nu-ri Energy Co., Ltd
Disclosure of joint ventures [line items]
Total assets	13,183	1,490
Total liabilities	29	0
Sales	0	0
Profit (loss) for the year	(44)	(10)
Hasami Wind Farm Corporation
Disclosure of joint ventures [line items]
Total assets		3,100
Total liabilities		0
Sales		0
Profit (loss) for the year		(23)
PungBack Wind Farm Corporation
Disclosure of joint ventures [line items]
Total assets	70,330	46,957
Total liabilities	51,804	31,667
Sales	0	0
Profit (loss) for the year	(255)	(3,089)
Trumbull Asset Management, LLC
Disclosure of joint ventures [line items]
Total assets	1,697	316
Total liabilities	497	0
Sales	5,955	656
Profit (loss) for the year	887	323
S-Power Chile SpA
Disclosure of joint ventures [line items]
Total assets	2,240	2,430
Total liabilities	2,390	2,450
Sales	1,327	1,334
Profit (loss) for the year	(139)	22
Seungmun Green Energy
Disclosure of joint ventures [line items]
Total assets	144,600	46,283
Total liabilities	115,034	18,843
Sales	10,879	0
Profit (loss) for the year	2,127	367
Seobusambo highway photovoltaics Co., Ltd
Disclosure of joint ventures [line items]
Total assets	9,838	8,286
Total liabilities	5,362	4,453
Sales	1,051	217
Profit (loss) for the year	624	₩ 265
Yangyang Suri Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	111,682
Total liabilities	78,552
Sales	0
Profit (loss) for the year	(3,069)
KEPCO for Power Company
Disclosure of joint ventures [line items]
Total assets	235,212
Total liabilities	234,487
Sales	0
Profit (loss) for the year	(3,610)
Taebaek Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	26,606
Total liabilities	3,385
Sales	7,384
Profit (loss) for the year	3,752
Jeonju Bio Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	4,916
Total liabilities	0
Sales	0
Profit (loss) for the year	(84)
Kumyang Eco Park Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	13,831
Total liabilities	1,395
Sales	0
Profit (loss) for the year	(71)
Jeongeup Green Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	11,243
Total liabilities	5,462
Sales	0
Profit (loss) for the year	(1,343)
Hadong E-factory Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	1,544
Total liabilities	399
Sales	0
Profit (loss) for the year	(13)
Namyangju Combined Heat and Power Co., Ltd.
Disclosure of joint ventures [line items]
Total assets	7,000
Total liabilities	0
Sales	0
Profit (loss) for the year	0
Wadi Noor Solar Power Company SAOC
Disclosure of joint ventures [line items]
Total assets	70,963
Total liabilities	69,288
Sales	0
Profit (loss) for the year	0
Fairhaven Energy Storage LLC
Disclosure of joint ventures [line items]
Total assets	0
Total liabilities	0
Sales	0
Profit (loss) for the year	₩ 0

Investments in Joint Ventures 4

Investments in Joint Ventures 4 (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Disclosure of joint ventures [line items]
Book value		₩ 3,485,699		₩ 3,147,584		₩ 2,239,011
KEPCO-Uhde Inc.
Disclosure of joint ventures [line items]
Net assets				₩ 33
Effective percentage of ownership	[1]			50.85%
Share in net assets				₩ 17
Investment differential				0
Intercompany transaction				0
Others				0
Book value		0		17	[2]	58
Shuweihat Asia Power Investment B.V.
Disclosure of joint ventures [line items]
Net assets		₩ 142,660		₩ 135,617
Effective percentage of ownership	[1]	49%		49%
Share in net assets		₩ 69,902		₩ 66,452
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		69,902		66,452		37,069
Shuweihat Asia Operation & Maintenance Company
Disclosure of joint ventures [line items]
Net assets		₩ 3,305		₩ 2,966
Effective percentage of ownership	[1]	55%		55%
Share in net assets		₩ 1,818		₩ 1,631
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		1,818		1,631	[2]	1,380
Waterbury Lake Uranium L.P.
Disclosure of joint ventures [line items]
Net assets		₩ 73,770		₩ 66,589
Effective percentage of ownership	[1]	30.65%		32.59%
Share in net assets		₩ 22,612		₩ 21,701
Investment differential		0		49
Intercompany transaction		0		0
Others		0		0
Book value		22,612	[3]	21,750	[3]	21,590
ASM-BG Investicii AD
Disclosure of joint ventures [line items]
Net assets		₩ 29,478		₩ 29,110
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 14,739		₩ 14,555
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		14,739		14,555		18,692
RES Technology AD
Disclosure of joint ventures [line items]
Net assets		₩ 28,765		₩ 30,266
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 14,383		₩ 15,133
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		14,383		15,133		16,703
KV Holdings, Inc.
Disclosure of joint ventures [line items]
Net assets		₩ 12,966		₩ 24,148
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 5,186		₩ 9,659
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		5,186		9,659	[4]	2,527
KEPCO SPC Power Corporation
Disclosure of joint ventures [line items]
Net assets		₩ 261,362		₩ 238,822
Effective percentage of ownership	[1]	75.20%		75.20%
Share in net assets		₩ 196,544		₩ 179,594
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		196,544	[2],[5]	179,594	[4]	198,979
Gansu Datang Yumen Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 15,788		₩ 15,059
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 6,315		₩ 6,024
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		6,315		6,024		6,635
Datang Chifeng Renewable Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 466,847		₩ 479,954
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 186,739		₩ 191,982
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		186,739		191,982		204,587
Datang KEPCO Chaoyang Renewable Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 108,017		₩ 110,995
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 43,207		₩ 44,398
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		43,207		44,398		44,217
Rabigh Electricity Company
Disclosure of joint ventures [line items]
Net assets		₩ 701,614		₩ 665,110
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 280,646		₩ 266,044
Investment differential		0		0
Intercompany transaction		(45,692)		(50,632)
Others		97		(805)
Book value		235,051		214,607		143,678
Rabigh Operation & Maintenance Company Limited
Disclosure of joint ventures [line items]
Net assets		₩ 12,411		₩ 12,782
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 4,964		₩ 5,113
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		4,964		5,113		4,071
Jamaica Public Service Company Limited
Disclosure of joint ventures [line items]
Net assets		₩ 840,820		₩ 795,250
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 336,328		₩ 318,100
Investment differential		29,357		29,357
Intercompany transaction		0		0
Others		(15,819)		(16,050)
Book value		349,866		331,407		294,649
KW Nuclear Components Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 41,903		₩ 38,368
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 18,856		₩ 17,266
Investment differential		0		0
Intercompany transaction		0		0
Others		(176)		(176)
Book value		18,680		17,090		15,734
Busan Shinho Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 26,675		₩ 26,877
Effective percentage of ownership	[1]	25%		25%
Share in net assets		₩ 6,669		₩ 6,719
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		6,669		6,719		5,841
Global Trade Of Power System Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 2,121		₩ 2,406
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 615		₩ 698
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		615		698	[6]	597
Expressway Solar-light Power Generation Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 10,374		₩ 9,508
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 5,187		₩ 4,754
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		5,187		4,754	[7]	3,084
Amman Asia Electric Power Company
Disclosure of joint ventures [line items]
Net assets		₩ 372,373		₩ 367,090
Effective percentage of ownership	[1]	60%		60%
Share in net assets		₩ 223,424		₩ 220,254
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		223,424		220,254	[2]	178,679
KAPES, Inc.
Disclosure of joint ventures [line items]
Net assets		₩ 37,591		₩ 37,875
Effective percentage of ownership	[1]	51%		51%
Share in net assets		₩ 19,171		₩ 19,316
Investment differential		0		0
Intercompany transaction		(22,186)		(22,451)
Others		3,015		3,135
Book value		0		0	[2]	0
Honam Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 16,245		₩ 16,506
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 4,711		₩ 4,787
Investment differential		32		32
Intercompany transaction		0		0
Others		0		0
Book value		4,743		4,819		4,041
Korea Power Engineering Service Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 19,681		₩ 19,114
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 5,708		₩ 5,543
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		5,708		5,543		5,415
Chun-cheon Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 118,152		₩ 107,990
Effective percentage of ownership	[1]	29.90%		29.90%
Share in net assets		₩ 35,327		₩ 32,289
Investment differential		3		3
Intercompany transaction		0		0
Others		(247)		(248)
Book value		35,083		32,044		25,896
Yeonggwangbaeksu Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 22,918		₩ 20,972
Effective percentage of ownership	[1]	15%		15%
Share in net assets		₩ 3,437		₩ 3,146
Investment differential		6		5
Intercompany transaction		0		0
Others		0		0
Book value		3,443		3,151	[6]	2,728
Nghi Son 2 Power LLC
Disclosure of joint ventures [line items]
Net assets		₩ 835,977		₩ 817,678
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 417,989		₩ 408,839
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		417,989		408,839		0
Kelar S.A
Disclosure of joint ventures [line items]
Net assets		₩ 197,779		₩ 175,717
Effective percentage of ownership	[1]	65%		65%
Share in net assets		₩ 128,557		₩ 114,216
Investment differential		2,972		2,921
Intercompany transaction		0		0
Others		0		0
Book value		131,529		117,137	[2]	86,695
PT. Tanjung Power Indonesia
Disclosure of joint ventures [line items]
Net assets		₩ 257,574		₩ 265,448
Effective percentage of ownership	[1]	35%		35%
Share in net assets		₩ 90,151		₩ 92,907
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		90,151		92,907		46,546
Incheon New Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 1,027		₩ 1,878
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 298		₩ 545
Investment differential		0		0
Intercompany transaction		0		0
Others		0		(347)
Book value		298		198	[3]	0
Seokmun Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 57,211		₩ 59,778
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 16,591		₩ 17,336
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		16,591		17,336		13,842
Daehan Wind Power PSC
Disclosure of joint ventures [line items]
Net assets		₩ 32,853		₩ 27,846
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 16,426		₩ 13,923
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		16,426		13,923		5,154
Barakah One Company
Disclosure of joint ventures [line items]
Net assets		₩ (1,314,727)		₩ (835,613)
Effective percentage of ownership	[1]	18%		18%
Share in net assets		₩ (236,651)		₩ (150,410)
Investment differential		0		0
Intercompany transaction		95,932		56,437
Others		140,719		93,973
Book value		0	[8]	0	[8]	0
Nawah Energy Company
Disclosure of joint ventures [line items]
Net assets		₩ 1,835		₩ 1,749
Effective percentage of ownership	[1]	18%		18%
Share in net assets		₩ 330		₩ 315
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		330	[8]	315	[8]	294
Momentum
Disclosure of joint ventures [line items]
Net assets		₩ 628		₩ 1,035
Effective percentage of ownership	[1]	33.33%		33.33%
Share in net assets		₩ 209		₩ 345
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		209		345		368
Daegu Green Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 86,150		₩ 91,550
Effective percentage of ownership	[1]	54.24%		54.24%
Share in net assets		₩ 46,728		₩ 49,657
Investment differential		84		84
Intercompany transaction		0		0
Others		(20,382)		(20,381)
Book value		26,430		29,360	[9]	24,054
Yeonggwang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 49,756		₩ 43,958
Effective percentage of ownership	[1]	46%		46%
Share in net assets		₩ 22,888		₩ 20,221
Investment differential		492		492
Intercompany transaction		0		0
Others		0		0
Book value		23,380		20,713		17,646
Chester Solar IV SpA
Disclosure of joint ventures [line items]
Net assets		₩ 931		₩ 259
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 419		₩ 117
Investment differential		65		64
Intercompany transaction		0		0
Others		0		0
Book value		484		181		0
Chester Solar V SpA
Disclosure of joint ventures [line items]
Net assets		₩ 122		₩ 49
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 55		₩ 22
Investment differential		136		134
Intercompany transaction		0		0
Others		0		0
Book value		191		156		25
Diego de Almagro Solar SpA
Disclosure of joint ventures [line items]
Net assets		₩ 1,878		₩ 962
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 846		₩ 433
Investment differential		108		107
Intercompany transaction		0		0
Others		0		0
Book value		954		540		362
South Jamaica Power Company Limited
Disclosure of joint ventures [line items]
Net assets		₩ 215,559		₩ 232,199
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 43,112		₩ 46,440
Investment differential		0		0
Intercompany transaction		0		0
Others		(3)		(3)
Book value		43,109		46,437		37,360
Daesan Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 63,402		₩ 54,908
Effective percentage of ownership	[1]	35%		35%
Share in net assets		₩ 22,191		₩ 19,218
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		22,191		19,218		21,244
RE Holiday Holdings LLC
Disclosure of joint ventures [line items]
Net assets		₩ 168,184		₩ 170,740
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 84,092		₩ 85,370
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		84,092		85,370		73,167
RE Pioneer Holdings LLC
Disclosure of joint ventures [line items]
Net assets		₩ 108,162		₩ 110,344
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 54,081		₩ 55,172
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		54,081		55,172		47,015
RE Barren Ridge 1 Holdings LLC
Disclosure of joint ventures [line items]
Net assets		₩ 116,307		₩ 126,068
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 58,154		₩ 63,034
Investment differential		0		0
Intercompany transaction		0		0
Others		0		(59,684)
Book value		58,154		3,350		1,883
RE Astoria 2 LandCo LLC
Disclosure of joint ventures [line items]
Net assets		₩ 13,874		₩ 13,198
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 6,937		₩ 6,599
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		6,937		6,599		5,998
RE Barren Ridge LandCo LLC
Disclosure of joint ventures [line items]
Net assets		₩ 4,883		₩ 4,666
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 2,441		₩ 2,333
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		2,441		2,333		2,120
Laurel SpA
Disclosure of joint ventures [line items]
Net assets		₩ 897		₩ 774
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 403		₩ 348
Investment differential		210		206
Intercompany transaction		0		0
Others		0		0
Book value		613		554		290
KIAMCO KOWEPO Bannerton Hold Co Pty Ltd
Disclosure of joint ventures [line items]
Net assets		₩ 29,997		₩ 29,443
Effective percentage of ownership	[1]	12.37%		12.37%
Share in net assets		₩ 3,710		₩ 3,642
Investment differential		9		9
Intercompany transaction		0		0
Others		0		0
Book value		3,719		3,651	[6]	3,625
Chile Solar JV SpA
Disclosure of joint ventures [line items]
Net assets				₩ 19,637
Effective percentage of ownership	[1]			50%
Share in net assets				₩ 9,819
Investment differential				0
Intercompany transaction				0
Others				0
Book value		0		9,819		32,457
Cheong-Song Noraesan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 12,734		₩ 14,484
Effective percentage of ownership	[1]	29.01%		29.01%
Share in net assets		₩ 3,695		₩ 4,202
Investment differential		61		61
Intercompany transaction		0		0
Others		0		0
Book value		3,756	[3]	4,263	[3]	4,106
Chester Solar I SpA
Disclosure of joint ventures [line items]
Net assets		₩ 2,134		₩ 2,313
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 960		₩ 1,041
Investment differential		278		273
Intercompany transaction		0		0
Others		0		0
Book value		1,238		1,314		1,120
Solar Philippines Calatagan Corporation
Disclosure of joint ventures [line items]
Net assets		₩ 108,382		₩ 76,571
Effective percentage of ownership	[1]	38%		38%
Share in net assets		₩ 41,185		₩ 29,097
Investment differential		0		0
Intercompany transaction		0		0
Others		16,945		27,805
Book value		58,130		56,902		58,231
Saemangeum Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 28,911		₩ 29,073
Effective percentage of ownership	[1]	81.01%		81.01%
Share in net assets		₩ 23,419		₩ 23,551
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		23,419		23,551	[10]	23,939
Chungsongmeon BongSan wind power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 3,045		₩ 5,823
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 883		₩ 1,689
Investment differential		1,782		1,781
Intercompany transaction		0		0
Others		0		0
Book value		2,665		3,470	[6]	3,808
Jaeun Resident Wind Power Plant Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 7,636		₩ 7,709
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 2,214		₩ 2,236
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		2,214	[6]	2,236	[6]	1,958
DE Energia SpA
Disclosure of joint ventures [line items]
Net assets		₩ 6,601		₩ (14,131)
Effective percentage of ownership	[1]	49%		49%
Share in net assets		₩ 3,235		₩ (6,924)
Investment differential		0		0
Intercompany transaction		0		0
Others		6,468		16,460
Book value		9,703		9,536		8,921
Dangjin Eco Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 77,681		₩ 77,993
Effective percentage of ownership	[1]	34%		34%
Share in net assets		₩ 26,412		₩ 26,518
Investment differential		341		341
Intercompany transaction		0		0
Others		0		0
Book value		26,753		26,859		26,109
Haemodum Solar Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 6,371		₩ 6,871
Effective percentage of ownership	[1]	49%		49%
Share in net assets		₩ 3,122		₩ 3,367
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		3,122		3,367		3,081
Yangyang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 20,784		₩ 21,642
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 10,392		₩ 10,821
Investment differential		43		43
Intercompany transaction		0		0
Others		0		0
Book value		10,435		10,864		11,191
Horus Solar, S.A. De C.V.
Disclosure of joint ventures [line items]
Net assets		₩ 50,862		₩ 22,722
Effective percentage of ownership	[1]	14.95%		14.95%
Share in net assets		₩ 7,601		₩ 3,396
Investment differential		3,580		3,580
Intercompany transaction		0		0
Others		0		0
Book value		11,181	[11]	6,976	[12]	5,842
Recursos Solares PV De Mexico II, S.A. De C.V.
Disclosure of joint ventures [line items]
Net assets		₩ 58,636		₩ 18,253
Effective percentage of ownership	[1]	14.95%		14.95%
Share in net assets		₩ 8,764		₩ 2,728
Investment differential		2,171		2,171
Intercompany transaction		0		0
Others		0		0
Book value		10,935	[11]	4,899	[12]	4,536
Sunmex Renovables, S.A. De C.V.
Disclosure of joint ventures [line items]
Net assets		₩ 23,664		₩ 11,053
Effective percentage of ownership	[1]	14.95%		14.95%
Share in net assets		₩ 3,536		₩ 1,652
Investment differential		5		5
Intercompany transaction		0		0
Others		0		0
Book value		3,541	[11]	1,657	[12]	1,610
Stavro Holding II A.B.
Disclosure of joint ventures [line items]
Net assets		₩ 91,314		₩ 85,856
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 18,263		₩ 17,171
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		18,263		17,171		17,627
Solaseado Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 42,651		₩ 38,230
Effective percentage of ownership	[1]	38.90%		38.90%
Share in net assets		₩ 16,592		₩ 14,872
Investment differential		1,361		1,361
Intercompany transaction		0		0
Others		0		0
Book value		17,953		16,233		9,891
Yeongam Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 46,650		₩ 47,923
Effective percentage of ownership	[1]	19%		19%
Share in net assets		₩ 8,864		₩ 9,105
Investment differential		773		774
Intercompany transaction		0		0
Others		0		0
Book value		9,637	[6]	9,879	[6]	6,838
Samsu Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 15,903		₩ 16,869
Effective percentage of ownership	[1]	19%		19%
Share in net assets		₩ 3,022		₩ 3,205
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		3,022	[6]	3,205	[6]	2,828
Pulau Indah Power Plant Sdn. Bhd.
Disclosure of joint ventures [line items]
Net assets		₩ 79,841		₩ 84,683
Effective percentage of ownership	[1]	25%		25%
Share in net assets		₩ 19,960		₩ 21,171
Investment differential		5,643		5,643
Intercompany transaction		0		0
Others		0		0
Book value		25,603		26,814		22,099
NH-Amundi Global Infrastructure Investment Private Investment Trust 21
Disclosure of joint ventures [line items]
Net assets		₩ 72,368		₩ 71,777
Effective percentage of ownership	[1]	29.53%		29.53%
Share in net assets		₩ 21,370		₩ 21,196
Investment differential		527		527
Intercompany transaction		0		0
Others		0		0
Book value		21,897		21,723		21,456
Shin-han BNPP Private Investment Trust for East-West Sunlight Dream
Disclosure of joint ventures [line items]
Net assets		₩ 17,208		₩ 17,319
Effective percentage of ownership	[1]	90%		90%
Share in net assets		₩ 15,487		₩ 15,587
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		15,487		15,587	[2]	16,288
PT Barito Wahana Tenaga
Disclosure of joint ventures [line items]
Net assets		₩ 512,846		₩ 447,688
Effective percentage of ownership	[1]	30.61%		30.61%
Share in net assets		₩ 156,994		₩ 137,047
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		156,994		137,047		81,595
Cheongna Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 47,107		₩ 17,595
Effective percentage of ownership	[1]	50.10%		50.10%
Share in net assets		₩ 23,601		₩ 8,815
Investment differential		3,137		3,137
Intercompany transaction		(1,189)		(1,194)
Others		0		0
Book value		25,549		10,758	[10]	11,198
Naepo Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 18,101		₩ (51,219)
Effective percentage of ownership	[1]	29.20%		29.20%
Share in net assets		₩ 5,285		₩ (14,956)
Investment differential		0		0
Intercompany transaction		0		0
Others		0		14,956
Book value		5,285		0		0
Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Disclosure of joint ventures [line items]
Net assets		₩ (56,378)		₩ (59,627)
Effective percentage of ownership	[1]	46.30%		46.30%
Share in net assets		₩ (26,103)		₩ (27,607)
Investment differential		0		0
Intercompany transaction		(826)		(868)
Others		26,929		28,475
Book value		0	[13]	0	[14]	0
OneEnergy Asia Limited
Disclosure of joint ventures [line items]
Net assets		₩ 661,133		₩ 366,764
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ 264,454		₩ 146,706
Investment differential		25,512		25,512
Intercompany transaction		0		0
Others		0		0
Book value		289,966		172,218		79,700
KAS Investment I LLC
Disclosure of joint ventures [line items]
Net assets		₩ 52,806		₩ 61,046
Effective percentage of ownership	[1]	29.89%		29.89%
Share in net assets		₩ 15,784		₩ 18,247
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		15,784	[3]	18,247	[3]	15,273
KAS Investment II LLC
Disclosure of joint ventures [line items]
Net assets		₩ 52,554		₩ 60,800
Effective percentage of ownership	[1]	29.89%		29.89%
Share in net assets		₩ 15,709		₩ 18,173
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		15,709	[3]	18,173	[3]	15,213
Energyco Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 4,520		₩ 4,692
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 1,311		₩ 1,361
Investment differential		829		829
Intercompany transaction		0		0
Others		0		0
Book value		2,140		2,190		1,535
CAES, LLC
Disclosure of joint ventures [line items]
Net assets		₩ 48,490		₩ 49,670
Effective percentage of ownership	[1]	36%		36%
Share in net assets		₩ 17,457		₩ 17,881
Investment differential		2,923		2,924
Intercompany transaction		0		0
Others		0		0
Book value		20,380		20,805		18,435
Hapcheon Floating Photovoltaic Power Plant Inc.
Disclosure of joint ventures [line items]
Net assets		₩ 21,037		₩ 17,207
Effective percentage of ownership	[1]	49%		49%
Share in net assets		₩ 10,309		₩ 8,432
Investment differential		39		39
Intercompany transaction		0		0
Others		0		0
Book value		10,348	[6]	8,471	[6]	6,971
Busan Industrial Solar Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 2,740		₩ 3,133
Effective percentage of ownership	[1]	28.02%		28.02%
Share in net assets		₩ 768		₩ 878
Investment differential		290		290
Intercompany transaction		0		0
Others		0		0
Book value		1,058		1,168		612
Bitsolar Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ (5,932)		₩ (4,545)
Effective percentage of ownership	[1]	27.10%		27.10%
Share in net assets		₩ (1,607)		₩ (1,232)
Investment differential		352		352
Intercompany transaction		0		0
Others		1,607		1,232
Book value		352		352		352
Pulau Indah O&M Sdn. Bhd.
Disclosure of joint ventures [line items]
Net assets		₩ 0		₩ 0
Effective percentage of ownership	[1]	60%		60%
Share in net assets		₩ 0		₩ 0
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		0		0		0
Guadalupe Solar SpA
Disclosure of joint ventures [line items]
Net assets		₩ 1,835		₩ 1,358
Effective percentage of ownership	[1]	60%		60%
Share in net assets		₩ 1,102		₩ 815
Investment differential		98		98
Intercompany transaction		0		0
Others		0		0
Book value		1,200	[10]	913	[10]	659
Omisan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 23,960		₩ 24,393
Effective percentage of ownership	[1]	42%		42%
Share in net assets		₩ 10,063		₩ 10,245
Investment differential		166		166
Intercompany transaction		0		0
Others		0		0
Book value		10,229		10,411		10,633
Foresight Iberian Solar Group Holding, S.L.
Disclosure of joint ventures [line items]
Net assets		₩ 8,923		₩ 12,184
Effective percentage of ownership	[1]	75%		75%
Share in net assets		₩ 6,692		₩ 9,138
Investment differential		1,427		1,427
Intercompany transaction		0		0
Others		0		0
Book value		8,119		10,565		9,743
Yeongwol Eco Wind Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 7,573		₩ 4,575
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 2,196		₩ 1,327
Investment differential		1,828		1,828
Intercompany transaction		0		0
Others		0		0
Book value		4,024		3,155		3,196
Gurae Resident Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 1,797		₩ 1,182
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 521		₩ 343
Investment differential		48		48
Intercompany transaction		0		0
Others		0		0
Book value		569		391		395
Cheongju Eco Park Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 30,609		₩ 35,500
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 8,877		₩ 10,295
Investment differential		195		195
Intercompany transaction		0		0
Others		0		0
Book value		9,072		10,490		5,465
Enel X Midland Photovoltaic, LLC
Disclosure of joint ventures [line items]
Net assets		₩ 12,710		₩ 9,279
Effective percentage of ownership	[1]	20%		20%
Share in net assets		₩ 2,542		₩ 1,856
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		2,542		1,856		1,688
Geumsungsan Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 17,101		₩ 10,128
Effective percentage of ownership	[1]	29%		29%
Share in net assets		₩ 4,959		₩ 2,937
Investment differential		556		556
Intercompany transaction		0		0
Others		0		0
Book value		5,515		3,493		6,053
KEPCO KPS CARABAO Corp.
Disclosure of joint ventures [line items]
Net assets		₩ (93)		₩ 443
Effective percentage of ownership	[1]	40%		40%
Share in net assets		₩ (37)		₩ 177
Investment differential		0		0
Intercompany transaction		0		0
Others		37		0
Book value		0		177	[15]	386
Prime Swedish Holding AB
Disclosure of joint ventures [line items]
Net assets		₩ 83,481		₩ 77,828
Effective percentage of ownership	[1]	45%		45%
Share in net assets		₩ 37,566		₩ 35,023
Investment differential		1,223		1,222
Intercompany transaction		0		0
Others		0		0
Book value		38,789		36,245		15,441
Goheung New Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 31,749		₩ 23,289
Effective percentage of ownership	[1]	46.15%		46.15%
Share in net assets		₩ 14,652		₩ 10,748
Investment differential		1,084		1,084
Intercompany transaction		0		0
Others		0		0
Book value		15,736		11,832		11,708
Gunsan Land Solar Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 35,587		₩ 36,586
Effective percentage of ownership	[1]	56.91%		75.29%
Share in net assets		₩ 20,251		₩ 27,544
Investment differential		0		0
Intercompany transaction		0		0
Others		2,178		0
Book value		22,429	[10],[16]	27,544	[10]	19,317
Capman Lynx SCA, SICAR
Disclosure of joint ventures [line items]
Net assets		₩ 6,832		₩ 9,908
Effective percentage of ownership	[1]	50%		50%
Share in net assets		₩ 3,416		₩ 4,954
Investment differential		0		0
Intercompany transaction		0		0
Others		(3,416)		(4,954)
Book value		0		0		9,976
International Offshore Power Transmission Holding Company Limited
Disclosure of joint ventures [line items]
Net assets		₩ 4,069		₩ (66,788)
Effective percentage of ownership	[1]	35%		35%
Share in net assets		₩ 1,425		₩ (23,376)
Investment differential		(2)		(2)
Intercompany transaction		0		0
Others		0		23,378
Book value		1,423		0		0
Pyeongchang Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 21,083		₩ 24,938
Effective percentage of ownership	[1]	58%		58%
Share in net assets		₩ 12,228		₩ 14,464
Investment differential		0		0
Intercompany transaction		0		0
Others		0		0
Book value		12,228	[17]	14,464	[18]	0
Eumseong Eco Park [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 17,173
Effective percentage of ownership	[1]			29%
Share in net assets				₩ 4,980
Investment differential				577
Intercompany transaction				0
Others				0
Book value		8,386		5,557		0
Songsan Green Energy [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 5,500
Effective percentage of ownership	[1]			25%
Share in net assets				₩ 1,375
Investment differential				12
Intercompany transaction				0
Others				0
Book value		0		1,387	[3]	0
Changwon Nuri Energy [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 1,490
Effective percentage of ownership	[1]			33.33%
Share in net assets				₩ 497
Investment differential				0
Intercompany transaction				0
Others				0
Book value		8,027	[6]	497	[3]	0
Hasami Wind Farm Corporation [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 3,100
Effective percentage of ownership	[1]			29%
Share in net assets				₩ 899
Investment differential				690
Intercompany transaction				0
Others				0
Book value		0		1,589		0
PungBack Wind Farm Corporation [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 15,290
Effective percentage of ownership	[1]			37%
Share in net assets				₩ 5,657
Investment differential				1,086
Intercompany transaction				0
Others				0
Book value		7,940		6,743	[19]	0
Trumbull Asset Management, LLC [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 316
Effective percentage of ownership	[1]			78%
Share in net assets				₩ 246
Investment differential				0
Intercompany transaction				0
Others				0
Book value		936	[17]	246	[17]	0
SPower Chile SpA [Member]
Disclosure of joint ventures [line items]
Net assets				₩ (20)
Effective percentage of ownership	[1]			50%
Share in net assets				₩ (10)
Investment differential				0
Intercompany transaction				0
Others				137
Book value		64		127		0
Seungmun Green Energy [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 27,440
Effective percentage of ownership	[1]			33%
Share in net assets				₩ 9,054
Investment differential				0
Intercompany transaction				0
Others				0
Book value		9,757		9,054		0
Seobusambo highway photovoltaics Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Net assets				₩ 3,833
Effective percentage of ownership	[1]			80%
Share in net assets				₩ 3,066
Investment differential				0
Intercompany transaction				0
Others				0
Book value		3,580		3,066	[20]	₩ 0
Yangyang Suri Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 33,130
Effective percentage of ownership	[1]	29%
Share in net assets		₩ 9,608
Investment differential		0
Intercompany transaction		0
Others		0
Book value		9,608	[3]	0
KEPCO for Power Company
Disclosure of joint ventures [line items]
Net assets		₩ 725
Effective percentage of ownership	[1]	60%
Share in net assets		₩ 435
Investment differential		0
Intercompany transaction		0
Others		0
Book value		435	[21]	0
Taebaek Wind Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 23,221
Effective percentage of ownership	[1]	60%
Share in net assets		₩ 13,932
Investment differential		0
Intercompany transaction		0
Others		0
Book value		13,932		0
Jeonju Bio Green Energy Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 4,916
Effective percentage of ownership	[1]	65%
Share in net assets		₩ 3,195
Investment differential		0
Intercompany transaction		0
Others		0
Book value		3,195	[10]	0
Kumyang Eco Park Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 12,436
Effective percentage of ownership	[1]	29%
Share in net assets		₩ 3,607
Investment differential		56
Intercompany transaction		0
Others		0
Book value		3,663		0
Jeongeup Green Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 5,781
Effective percentage of ownership	[1]	18.71%
Share in net assets		₩ 1,082
Investment differential		478
Intercompany transaction		0
Others		0
Book value		1,560	[22]	0
Hadong E-factory Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 1,145
Effective percentage of ownership	[1]	29.99%
Share in net assets		₩ 343
Investment differential		6
Intercompany transaction		0
Others		0
Book value		349	[3]	0
Namyangju Combined Heat and Power Co., Ltd.
Disclosure of joint ventures [line items]
Net assets		₩ 7,000
Effective percentage of ownership	[1]	55%
Share in net assets		₩ 3,850
Investment differential		0
Intercompany transaction		0
Others		0
Book value		3,850	[23]	0
Wadi Noor Solar Power Company SAOC
Disclosure of joint ventures [line items]
Net assets		₩ 1,675
Effective percentage of ownership	[1]	50%
Share in net assets		₩ 837
Investment differential		9
Intercompany transaction		0
Others		0
Book value		846		0
Fairhaven Energy Storage LLC
Disclosure of joint ventures [line items]
Net assets		₩ 0
Effective percentage of ownership	[1]	35%
Share in net assets		₩ 0
Investment differential		0
Intercompany transaction		0
Others		0
Book value		₩ 0	[24]	₩ 0
[1]The percentage of ownership shown above is after considering the treasury stocks and others.[2]The effective percentage of ownership is more than 50%. However, according to the shareholders’ agreement, all critical financial and operating decisions must be agreed to by all ownership parties and the Company can exercise same voting rights as other shareholders at the board of directors. Accordingly, the entities are classified as joint ventures.[3]The effective percentage of ownership is less than 50%. However, the entity is classified as a joint venture, because all consent was required to make decisions on related activities.[4]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.[5]The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.[6]According to the shareholders’ agreement, the parties have joint control over all decisions related to finance and operation. Accordingly, the entity is classified as joint ventures.[7]The effective percentage of ownership increased due to the disproportionate capital reduction of financial investors during the year ended December 31, 2022.[8]The effective percentage of ownership is less than 20%. However, decisions in relevant activities must be agreed by ownership parties. Accordingly, the entity is classified as joint ventures.[9]Although the nominal percentage of ownership is 29%, the effective percentage of ownership is 54.24%, considering the interest of financial investors as a liability component.[10]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.[11]The percentage of effective ownership is more than 20%. However, according to the shareholders’ agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.[12]The effective percentage of ownership is less than 20%. However, according to the shareholders' agreement, decisions related principal operation must be agreed by all ownership parties. Accordingly, the Company can exercise significant influence.[13]According to the REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.). Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of REC’s Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders' agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture.[14]According to the Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Investment Agreement signed in March 2011, the Company has a commitment to guarantee principal and certain returns on shares of Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.). held by NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation. Since NH Power 2nd Co., Ltd. and the National Agricultural Cooperative Federation have put option regarding their share of the entity, the Company was deemed to have acquired an additional 15.64% stake. As a result, the effective percentage of ownership is 46.3% in the current and prior period. In accordance with shareholders’ agreement signed during the current period, the Company has joint control with other investors in making important financial and operation decisions, so it has been reclassified from an associate to a joint venture.[15]The joint arrangement which the Company has joint control is structured through a separate company. The parties have joint control over the joint arrangement are classified as joint ventures, judging that they have rights to the net assets of the arrangement.[16]The nominal percentage of ownership is 75.29% and the effective percentage of ownership is 56.91%, as the Company has an obligation to provide excessive dividend income to Gunsan City when a certain rate of return defined in the shareholders’ agreement is met.[17]The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture.[18]After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all members of the board of directors. Accordingly, the entity is classified as a joint venture.[19]The effective percentage of ownership is 37%, considering potential common stock.[20]Due to the changes in the agreement, the Company lost its control over the entity. Accordingly, the entity is reclassified to a joint venture from a subsidiary. Although the effective percentage of ownership is more than 50%, decisions in relevant activities must be agreed by all members of the board of directors.[21]Although the Company’s effective percentage of ownership is more than 50%, the entity is reclassified as a joint venture since the entity’s material financial and operational decisions require unanimous agreement of members in the board of directors due to the shareholders’ agreement concluded during the year ended December 31, 2023.[22]Although the Company’s effective percentage of ownership is less than 20%, the entity is reclassified as a joint venture considering the Company can exercise significant influence on the entity due to the Company’s contractual right to appoint a director to the entity’s board of directors and the minimum number of the entity’s board of directors members required to agree for making decision on material financial and operational policies in accordance with the joint shareholders’ agreement .[23]Although the Company’s effective percentage of ownership is more than 50%, the entity is classified as a joint venture since the entity’s material financial and operational decisions require unanimous agreement of members in the board of directors.[24]Although the investment has not yet been paid, commitment to pay 35% of investment in the future has been made.

Investments in Associates (Pare

Investments in Associates (Parenthetical) (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Feb. 15, 2024	Dec. 31, 2021
Disclosure of joint ventures [line items]
Effective percentage of ownership				20%
Percentage of ownership interest including holding in treasury stock				14.29%
Investment in associates accounted for using equity method		₩ 6,176,889		₩ 5,844,464			₩ 5,232,373
Taebaek Guinemi Wind Power Co., Ltd
Disclosure of joint ventures [line items]
Effective percentage of ownership				50%
UD4M Co., Ltd.
Disclosure of joint ventures [line items]
Effective percentage of ownership	[1]	14.29%		14.29%
Percentage of ownership interest including holding in treasury stock		14.29%
Investment in associates accounted for using equity method		₩ 150		₩ 161			144
Saemangeum Sebit Power Plant Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership	[1]	55%		63.09%
Investment in associates accounted for using equity method		₩ 37,191	[2]	₩ 23,199	[3]		6,000
Environment and Energy Co., Ltd
Disclosure of joint ventures [line items]
Effective percentage of ownership	[1]	10.54%		10.54%
Investment in associates accounted for using equity method		₩ 9	[4]	₩ 10	[4]		₩ 0
Korea Gas Corporation
Disclosure of joint ventures [line items]
Investment in associates accounted for using equity method		₩ 1,970,642		₩ 2,085,296
Discount rate used to estimate current value in use		4.01%		5.20%
Korea Power Exchange [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		100%		100%
KNOC Nigerian East Oil [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership				20%
Samcheok Eco Materials Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership				25.54%
Nominal percentage of ownership associate		2.35%		2.35%
Dongducheon Dream Power [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		34.01%		34.01%
YTN Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Percentage Of Shares Sold						(21.43%)
Proceeds From Sale Of Shares						₩ 221,490
Bottom of range [member] | Saemangeum Sebit Power Plant Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		50%		50%
Bottom of range [member] | Korea Electric Power Corporation Fund [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		50%		50%
Bottom of range [member] | Nepal Water Energy Development Company Private Limited [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		50%		50%
Top of range [member] | UD4M Co., Ltd.
Disclosure of joint ventures [line items]
Effective percentage of ownership		20%
Top of range [member] | Environment and Energy Co., Ltd
Disclosure of joint ventures [line items]
Effective percentage of ownership		20%		20%
Top of range [member] | Gangwon Wind Power Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		20%		20%
Top of range [member] | KNOC Nigerian East Oil [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		20%
Top of range [member] | Samcheok Eco Materials Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		25.54%
Top of range [member] | Namjeongsusang Solar Power Operation Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership		20%		20%
Top of range [member] | Yeomsubong Wind Power Co., Ltd
Disclosure of joint ventures [line items]
Effective percentage of ownership				20%
[1]The percentage of ownership shown above is after considering the treasury stocks and others.[2]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2023. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[3]The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.[4]The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity.

Investments in Joint Ventures (

Investments in Joint Ventures (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
PungBack Wind Farm Corporation
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	37%	37%
Daegu Green Power Joint Ventures [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	54.24%	54.24%
Nominal percentage of ownership joint ventures	29%	29%
Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	46.30%	46.30%
Additional percentage of ownership joint ventures	15.64%	15.64%
SPC Power Corporation [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	56.91%
Nominal percentage of ownership joint ventures	75.29%
Fairhaven Energy Storage LLC [Member]
Disclosure of joint ventures [line items]
Additional percentage of ownership joint ventures	35%
Bottom of range [member] | Pulau Indah O&M Sdn. Bhd
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Bottom of range [member] | Trumbull Asset Management, LLC
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Bottom of range [member] | Taebaek Guinemi Wind Power Co., Ltd
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Bottom of range [member] | Seobusambo highway photovoltaics Co., Ltd.
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Bottom of range [member] | Shuweihat Asia Operation & Maintenance Company [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Bottom of range [member] | SUNMEX RENOVABLES, S.A. DE C.V. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture		20%
Top of range [member] | Waterbury Lake Uranium L.P.
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Top of range [member] | Nawah Energy Company
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	20%	20%
Top of range [member] | Saemangeum Solar Power Co., Ltd [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%	50%
Top of range [member] | SUNMEX RENOVABLES, S.A. DE C.V. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	20%
Top of range [member] | ITR Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	20%
Top of range [member] | Energy Infra Asset Management Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	20%
Top of range [member] | KEPCO for Power Company [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%
Top of range [member] | Taebaek Wind Power Co., Ltd. [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%
Top of range [member] | Jeongeup Green Power Co Ltd [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	20%
Top of range [member] | Namyangju Combined Heat and Power Co Ltd [Member]
Disclosure of joint ventures [line items]
Effective percentage of ownership in joint venture	50%

Investments in Associates and_3

Investments in Associates and Joint Ventures - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023
Time Period One [Member] | Daegu Green Power Co., Ltd.
Disclosure Of Investments in Associates and Joint Ventures [Line Items]
Duration from the date of investment after which the rights to purchase the shares may be exercised	5 years
Time Period Two [Member] | Daegu Green Power Co., Ltd.
Disclosure Of Investments in Associates and Joint Ventures [Line Items]
Duration from the date of investment after which the rights to purchase the shares may be exercised	10 years
Time Period Three [Member] | Daegu Green Power Co., Ltd.
Disclosure Of Investments in Associates and Joint Ventures [Line Items]
Duration from the date of investment after which the rights to purchase the shares may be exercised	13 years
Gemeng International Energy Co., Ltd. | Woori Spot PEF [Member]
Disclosure Of Investments in Associates and Joint Ventures [Line Items]
Put options as a percentage of shares	8%
Operating fees percentage	1%
Maturity date of the put options	Dec. 25, 2023

Property, Plant and Equipment -

Property, Plant and Equipment - Summary of Changes in Property, Plant and Equipment (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes in property and equipment [Line Items]
Beginning balance	₩ 177,865,308	₩ 173,134,638
Acquisitions	14,667,574	12,486,698
Disposals	(531,059)	(756,967)
Depreciation	(12,868,596)	(12,304,766)
Impairment	(17,031)	97,425
Others	759,339	5,208,280
Ending balance	179,875,535	177,865,308
Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	301,417,289
Ending balance	314,879,755	301,417,289
Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(122,280,663)
Ending balance	(133,721,042)	(122,280,663)
Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(756,064)
Ending balance	(749,537)	(756,064)
Government grants
Changes in property and equipment [Line Items]
Beginning balance	(515,254)
Ending balance	(533,641)	(515,254)
Land
Changes in property and equipment [Line Items]
Beginning balance	14,243,532
Ending balance	14,370,684	14,243,532
Land | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	14,270,937	14,107,965
Acquisitions	23,519	9,535
Disposals	(15,302)	(49,377)
Depreciation	0	0
Impairment	0	0
Others	118,934	202,814
Ending balance	14,398,088	14,270,937
Land | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	14,298,409
Ending balance	14,426,253	14,298,409
Land | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Land | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(27,472)
Ending balance	(28,165)	(27,472)
Land | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(27,405)	(23,474)
Acquisitions	0	0
Disposals	1	1
Depreciation	0	0
Impairment	0	0
Others	0	(3,932)
Ending balance	(27,404)	(27,405)
Buildings
Changes in property and equipment [Line Items]
Beginning balance	13,241,763
Ending balance	13,313,977	13,241,763
Buildings | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	13,292,200	12,926,226
Acquisitions	3,706	3,202
Disposals	(6,221)	(19,918)
Depreciation	(938,549)	(906,528)
Impairment	0	(449)
Others	1,009,068	1,289,667
Ending balance	13,360,204	13,292,200
Buildings | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	24,230,827
Ending balance	25,236,830	24,230,827
Buildings | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(10,931,672)
Ending balance	(11,870,875)	(10,931,672)
Buildings | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(6,955)
Ending balance	(5,751)	(6,955)
Buildings | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(50,437)	(52,122)
Acquisitions	0	0
Disposals	0	0
Depreciation	5,070	5,360
Impairment	0	0
Others	(860)	(3,675)
Ending balance	(46,227)	(50,437)
Structures
Changes in property and equipment [Line Items]
Beginning balance	50,283,627
Ending balance	50,732,120	50,283,627
Structures | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	50,449,235	48,290,052
Acquisitions	18,486	217,450
Disposals	(311,877)	(277,308)
Depreciation	(2,828,065)	(2,677,395)
Impairment	0	(3,669)
Others	3,562,222	4,900,105
Ending balance	50,890,001	50,449,235
Structures | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	83,055,890
Ending balance	86,010,823	83,055,890
Structures | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(32,596,265)
Ending balance	(35,111,297)	(32,596,265)
Structures | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(10,390)
Ending balance	(9,525)	(10,390)
Structures | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(165,608)	(172,021)
Acquisitions	0	0
Disposals	1,611	1,250
Depreciation	9,562	9,568
Impairment	0	0
Others	(3,446)	(4,405)
Ending balance	(157,881)	(165,608)
Machinery
Changes in property and equipment [Line Items]
Beginning balance	54,064,659
Ending balance	53,697,222	54,064,659
Machinery | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	54,191,785	51,755,382
Acquisitions	184,532	248,932
Disposals	(195,673)	(188,924)
Depreciation	(6,062,471)	(5,748,407)
Impairment	(6,331)	(33,191)
Others	5,705,204	8,157,993
Ending balance	53,817,046	54,191,785
Machinery | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	108,749,243
Ending balance	113,735,035	108,749,243
Machinery | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(54,015,594)
Ending balance	(59,381,603)	(54,015,594)
Machinery | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(541,864)
Ending balance	(536,386)	(541,864)
Machinery | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(127,126)	(140,082)
Acquisitions	0	0
Disposals	1,230	405
Depreciation	17,413	17,283
Impairment	0	0
Others	(11,341)	(4,732)
Ending balance	(119,824)	(127,126)
Ships
Changes in property and equipment [Line Items]
Beginning balance	13,476
Ending balance	12,365	13,476
Ships | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	13,476	177
Acquisitions	0	0
Disposals	0	0
Depreciation	(1,812)	(1,053)
Impairment	0	0
Others	701	14,352
Ending balance	12,365	13,476
Ships | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	17,264
Ending balance	17,845	17,264
Ships | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(3,788)
Ending balance	(5,480)	(3,788)
Ships | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Ships | Government grants
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Vehicles
Changes in property and equipment [Line Items]
Beginning balance	85,642
Ending balance	80,537	85,642
Vehicles | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	87,687	89,257
Acquisitions	5,778	1,813
Disposals	(76)	(88)
Depreciation	(40,760)	(41,907)
Impairment	0	0
Others	30,745	38,612
Ending balance	83,374	87,687
Vehicles | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	393,046
Ending balance	421,349	393,046
Vehicles | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(305,242)
Ending balance	(337,859)	(305,242)
Vehicles | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(117)
Ending balance	(116)	(117)
Vehicles | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(2,045)	(1,675)
Acquisitions	0	0
Disposals	0	0
Depreciation	960	663
Impairment	0	0
Others	(1,752)	(1,033)
Ending balance	(2,837)	(2,045)
Equipment
Changes in property and equipment [Line Items]
Beginning balance	429,133
Ending balance	424,943	429,133
Equipment | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	435,741	397,183
Acquisitions	62,291	79,369
Disposals	(264)	(183)
Depreciation	(206,894)	(205,908)
Impairment	0	(1)
Others	140,001	165,281
Ending balance	430,875	435,741
Equipment | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	2,168,348
Ending balance	2,341,242	2,168,348
Equipment | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(1,732,564)
Ending balance	(1,909,992)	(1,732,564)
Equipment | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(43)
Ending balance	(375)	(43)
Equipment | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(6,608)	(149)
Acquisitions	0	0
Disposals	0	0
Depreciation	2,011	494
Impairment	0	0
Others	(1,335)	(6,953)
Ending balance	(5,932)	(6,608)
Tools
Changes in property and equipment [Line Items]
Beginning balance	178,402
Ending balance	164,412	178,402
Tools | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	178,501	183,065
Acquisitions	30,598	25,291
Disposals	(364)	(180)
Depreciation	(78,487)	(77,902)
Impairment	0	0
Others	34,226	48,227
Ending balance	164,474	178,501
Tools | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	1,306,509
Ending balance	1,354,532	1,306,509
Tools | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(1,128,002)
Ending balance	(1,190,057)	(1,128,002)
Tools | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(6)
Ending balance	(1)	(6)
Tools | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(99)	(64)
Acquisitions	0	0
Disposals	0	0
Depreciation	38	32
Impairment	0	0
Others	(1)	(67)
Ending balance	(62)	(99)
Construction in progress
Changes in property and equipment [Line Items]
Beginning balance	27,905,545
Ending balance	31,835,028	27,905,545
Construction in progress | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	28,041,471	30,156,094
Acquisitions	14,069,968	11,671,907
Disposals	(1,511)	(197,293)
Depreciation	0	0
Impairment	(10,700)	134,735
Others	(10,090,726)	(13,723,972)
Ending balance	32,008,502	28,041,471
Construction in progress | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	28,064,266
Ending balance	32,031,297	28,064,266
Construction in progress | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Construction in progress | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(22,795)
Ending balance	(22,795)	(22,795)
Construction in progress | Government grants
Changes in property and equipment [Line Items]
Beginning balance	(135,926)	(111,822)
Acquisitions	5,544	23,155
Disposals	0	17
Depreciation	0	0
Impairment	0	0
Others	(43,092)	(47,276)
Ending balance	(173,474)	(135,926)
Right-of-use assets
Changes in property and equipment [Line Items]
Beginning balance	3,711,125
Ending balance	3,363,743	3,711,125
Right-of-use assets | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	3,711,125	4,059,397
Acquisitions	261,862	197,016
Disposals	(2,613)	(2,838)
Depreciation	(536,517)	(509,068)
Impairment	0	0
Others	(70,114)	(33,382)
Ending balance	3,363,743	3,711,125
Right-of-use assets | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	5,992,724
Ending balance	6,041,794	5,992,724
Right-of-use assets | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(2,281,599)
Ending balance	(2,678,051)	(2,281,599)
Right-of-use assets | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Right-of-use assets | Government grants
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Retirements, property, plant and equipment
Changes in property and equipment [Line Items]
Beginning balance	11,288,967
Ending balance	9,733,574	11,288,967
Retirements, property, plant and equipment | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	11,288,967	8,925,388
Acquisitions	0	0
Disposals	0	0
Depreciation	(1,251,446)	(1,133,866)
Impairment	0	0
Others	(303,947)	3,497,445
Ending balance	9,733,574	11,288,967
Retirements, property, plant and equipment | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	17,620,603
Ending balance	17,007,088	17,620,603
Retirements, property, plant and equipment | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(6,185,214)
Ending balance	(7,127,091)	(6,185,214)
Retirements, property, plant and equipment | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	(146,422)
Ending balance	(146,423)	(146,422)
Retirements, property, plant and equipment | Government grants
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Other property, plant and equipment
Changes in property and equipment [Line Items]
Beginning balance	2,419,437
Ending balance	2,146,930	2,419,437
Other property, plant and equipment | Carrying Amount Other than Government Grants [Member]
Changes in property and equipment [Line Items]
Beginning balance	2,419,437	2,745,861
Acquisitions	1,290	9,028
Disposals	0	(22,531)
Depreciation	(958,649)	(1,036,132)
Impairment	0	0
Others	684,852	723,211
Ending balance	2,146,930	2,419,437
Other property, plant and equipment | Acquisition cost
Changes in property and equipment [Line Items]
Beginning balance	15,520,160
Ending balance	16,255,667	15,520,160
Other property, plant and equipment | Accumulated depreciation
Changes in property and equipment [Line Items]
Beginning balance	(13,100,723)
Ending balance	(14,108,737)	(13,100,723)
Other property, plant and equipment | Accumulated impairment losses
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	0	0
Other property, plant and equipment | Government grants
Changes in property and equipment [Line Items]
Beginning balance	0
Ending balance	₩ 0	₩ 0

Property, Plant and Equipment_2

Property, Plant and Equipment - Summary of Changes in Preperty, Plant and Equipment (Details) (Parenthetical) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]
Impairment of property plant and equipment	₩ 17,031	₩ 37,311	₩ 4,056
Property plant and equipment	179,875,535	177,865,308	173,134,638
Revenue	87,476,410	70,546,024	60,012,375
Cost of sales	89,699,527	100,903,594	₩ 63,644,290
Property, Plant and Equipment-Proceeds before Intended Use [member]
Disclosure of detailed information about property, plant and equipment [line items]
Revenue	38,149	94,264
Property Plant and Equipment Costs Before Intended Use [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Cost of sales	45,578	63,405
Construction in progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property plant and equipment	31,835,028	27,905,545
Korea Western Power Co., Ltd. [member]
Disclosure of detailed information about property, plant and equipment [line items]
Revenue	6,915,233	8,112,727
Korea Western Power Co., Ltd. [member] | Taean IGCC Gas Refinery [member]
Disclosure of detailed information about property, plant and equipment [line items]
Impairment of property plant and equipment	6,331
Guam Ukudu Power LLC [member]
Disclosure of detailed information about property, plant and equipment [line items]
Revenue	0	₩ 0
Guam Ukudu Power LLC [member] | Construction in progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property plant and equipment	₩ 10,700

Investment Properties - Summary

Investment Properties - Summary of Investment Properties and Changes in Investment Properties (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about investment property [line items]
Beginning balance	₩ 208,286	₩ 212,784
Disposal	0	(208)
Depreciation	(493)	(486)	₩ (1,386)
Others	(22,266)	(3,804)
Endings balance	185,527	208,286	212,784
Acquisition cost
Disclosure of detailed information about investment property [line items]
Beginning balance	214,658
Endings balance	192,637	214,658
Accumulated depreciation
Disclosure of detailed information about investment property [line items]
Beginning balance	(6,351)
Endings balance	(7,088)	(6,351)
Government grants
Disclosure of detailed information about investment property [line items]
Beginning balance	(21)	(30)
Disposal	0	0
Depreciation	1	1
Others	(2)	8
Endings balance	(22)	(21)	(30)
Investment property - Land
Disclosure of detailed information about investment property [line items]
Beginning balance	194,417
Endings balance	172,594	194,417
Investment property - Land | Carrying Amount Other than Government Grants
Disclosure of detailed information about investment property [line items]
Beginning balance	194,417	201,605
Disposal	0	(208)
Depreciation	0	0
Others	(21,823)	(6,980)
Endings balance	172,594	194,417	201,605
Investment property - Land | Acquisition cost
Disclosure of detailed information about investment property [line items]
Beginning balance	194,417
Endings balance	172,594	194,417
Investment property - Land | Accumulated depreciation
Disclosure of detailed information about investment property [line items]
Beginning balance	0
Endings balance	0	0
Investment property - Land | Government grants
Disclosure of detailed information about investment property [line items]
Beginning balance	0
Endings balance	0	0
Investment property - Buildings
Disclosure of detailed information about investment property [line items]
Beginning balance	13,869
Endings balance	12,933	13,869
Investment property - Buildings | Carrying Amount Other than Government Grants
Disclosure of detailed information about investment property [line items]
Beginning balance	13,890	11,209
Disposal	0	0
Depreciation	(494)	(487)
Others	(441)	3,168
Endings balance	12,955	13,890	₩ 11,209
Investment property - Buildings | Acquisition cost
Disclosure of detailed information about investment property [line items]
Beginning balance	20,241
Endings balance	20,043	20,241
Investment property - Buildings | Accumulated depreciation
Disclosure of detailed information about investment property [line items]
Beginning balance	(6,351)
Endings balance	(7,088)	(6,351)
Investment property - Buildings | Government grants
Disclosure of detailed information about investment property [line items]
Beginning balance	(21)
Endings balance	₩ (22)	₩ (21)

Investment Properties - Summa_2

Investment Properties - Summary of Income and Expenses Related to Investment Properties (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Rental income from investment property, net of direct operating expense [abstract]
Rental income	₩ 10,519	₩ 9,775
Operating and maintenance expenses related to rental income	(507)	(587)
Rental income from investment property, net of direct operating expense	₩ 10,012	₩ 9,188

Investment Properties - Summa_3

Investment Properties - Summary of Fair Value of Investment Properties (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure The fair value of investment property [Line Items]
Investment properties	₩ 185,527	₩ 208,286	₩ 212,784
Land
Disclosure The fair value of investment property [Line Items]
Investment properties	172,594	194,417
Buildings
Disclosure The fair value of investment property [Line Items]
Investment properties	12,933	13,869
Book value
Disclosure The fair value of investment property [Line Items]
Investment properties	185,527	208,286
Book value | Land
Disclosure The fair value of investment property [Line Items]
Investment properties	172,594	194,417
Book value | Buildings
Disclosure The fair value of investment property [Line Items]
Investment properties	12,933	13,869
Fair value
Disclosure The fair value of investment property [Line Items]
Investment properties	271,915	308,453
Fair value | Land
Disclosure The fair value of investment property [Line Items]
Investment properties	258,478	292,827
Fair value | Buildings
Disclosure The fair value of investment property [Line Items]
Investment properties	₩ 13,437	₩ 15,626

Construction Contracts - Summar

Construction Contracts - Summary of Changes in Total Contract Amount in Which Revenue is Not Yet Recognized (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Construction Services Contracts [Abstract]
Beginning balance	₩ 5,594,946	₩ 2,783,935	₩ 3,152,725
Increase and decrease
New orders and foreign exchange impact	1,029,165	3,578,599	458,635
Changes in scope of construction work	43,116	81,401	72,427
Increase (decrease) in Construction contracts from new orders and foreign exchange	986,049	3,457,964	386,208
Recognized as revenue	(785,395)	(646,953)	(754,998)
Ending balance	₩ 5,795,600	₩ 5,594,946	₩ 2,783,935

Construction Contracts - Summ_2

Construction Contracts - Summary of Gross Amount of Assets and Liabilities for Contract and Accumulated Earned Revenue, Expense and Others (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Accumulated earned revenue, expense and others
Accumulated earned revenue		₩ 22,996,785	₩ 22,507,004
Accumulated expense		22,382,628	21,666,552
Accumulated profit		614,157	840,452
Unearned advance receipts		74,253	29,877
Construction contracts
Construction Contract Assets and Liabilities [Abstract]
Assets	[1]	183,204	118,983
Liabilities	[2]	₩ 270,789	₩ 120,952
[1]Included in trade and other receivables, net, in the consolidated statements of financial position. The balance of trade receivables from construction contracts are ￦85,757 million and ￦101,180 million, as of December 31, 2022 and 2023, respectively.[2]Included in non-financial liabilities as advance received in the consolidated statements of financial position. The revenue recognized on December 31, 2023 from the amounts included in contract liabilities at the end of the prior year is ￦117,311 million.

Construction Contracts - Additi

Construction Contracts - Additional Information (Details) - Construction Contracts [Member] - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accumulated Earned Revenue Expense And Others [Line Items]
Receivables from contracts with customers	₩ 101,180	₩ 85,757
Revenue that was included in contract liability balance at beginning of period	117,311
Revenue from performance obligations satisfied or partially satisfied in previous periods	₩ 9,367

Intangible Assets other than _3

Intangible Assets other than Goodwill - Summary of Intangible Asset Explanatory and Changes in intangible assets (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	₩ 956,664
Changes in intangible assets other than goodwill
Reversal	0	₩ 0	₩ (14)
Impairment	(2,865)	(164)	0
Ending balance	1,033,984	956,664
Intangible assets other than goodwill
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	956,664	1,044,077
Changes in intangible assets other than goodwill
Acquisition	79,315	126,295
Disposal	(208)	(354)
Amortization	(163,174)	(156,160)
Reversal		(164)
Impairment	(283)
Others	161,670	(57,030)
Ending balance	1,033,984	956,664	1,044,077
Intangible assets other than goodwill | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	3,963,439
Changes in intangible assets other than goodwill
Ending balance	4,222,403	3,963,439
Intangible assets other than goodwill | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(2,429,624)
Changes in intangible assets other than goodwill
Ending balance	(2,598,953)	(2,429,624)
Intangible assets other than goodwill | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(571,325)
Changes in intangible assets other than goodwill
Ending balance	(584,152)	(571,325)
Intangible assets other than goodwill | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(5,826)
Changes in intangible assets other than goodwill
Ending balance	(5,314)	(5,826)
Software
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	202,833
Changes in intangible assets other than goodwill
Ending balance	197,428	202,833
Software | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	203,007	162,596
Changes in intangible assets other than goodwill
Acquisition	12,837	22,532
Disposal	(18)	(57)
Amortization	(86,174)	(84,649)
Reversal		0
Impairment	0
Others	68,189	102,585
Ending balance	197,841	203,007	162,596
Software | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	1,002,040
Changes in intangible assets other than goodwill
Ending balance	1,083,537	1,002,040
Software | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(799,013)
Changes in intangible assets other than goodwill
Ending balance	(885,677)	(799,013)
Software | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(20)
Changes in intangible assets other than goodwill
Ending balance	(19)	(20)
Software | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(174)	(91)
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	85	60
Reversal		0
Impairment	0
Others	(324)	(143)
Ending balance	(413)	(174)	(91)
Copyrights, patents rights and other industrial rights
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	28,013
Changes in intangible assets other than goodwill
Ending balance	23,491	28,013
Copyrights, patents rights and other industrial rights | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	28,013	35,187
Changes in intangible assets other than goodwill
Acquisition	319	270
Disposal	(70)	(37)
Amortization	(4,918)	(7,136)
Reversal		0
Impairment	(180)
Others	327	(271)
Ending balance	23,491	28,013	35,187
Copyrights, patents rights and other industrial rights | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	104,559
Changes in intangible assets other than goodwill
Ending balance	105,827	104,559
Copyrights, patents rights and other industrial rights | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(67,368)
Changes in intangible assets other than goodwill
Ending balance	(73,158)	(67,368)
Copyrights, patents rights and other industrial rights | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(9,178)
Changes in intangible assets other than goodwill
Ending balance	(9,178)	(9,178)
Copyrights, patents rights and other industrial rights | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Mining rights
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	38,525
Changes in intangible assets other than goodwill
Ending balance	32,165	38,525
Mining rights | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	38,525	41,902
Changes in intangible assets other than goodwill
Acquisition	2,164	2,395
Disposal	0	0
Amortization	(10,289)	(4,296)
Reversal		0
Impairment	0
Others	1,765	(1,476)
Ending balance	32,165	38,525	41,902
Mining rights | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	625,845
Changes in intangible assets other than goodwill
Ending balance	643,625	625,845
Mining rights | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(46,187)
Changes in intangible assets other than goodwill
Ending balance	(57,549)	(46,187)
Mining rights | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(541,133)
Changes in intangible assets other than goodwill
Ending balance	(553,911)	(541,133)
Mining rights | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Development expenditures
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	51,028
Changes in intangible assets other than goodwill
Ending balance	53,313	51,028
Development expenditures | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	54,505	72,944
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	(25,614)	(24,238)
Reversal		0
Impairment	0
Others	26,543	5,799
Ending balance	55,434	54,505	72,944
Development expenditures | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	938,032
Changes in intangible assets other than goodwill
Ending balance	966,530	938,032
Development expenditures | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(883,527)
Changes in intangible assets other than goodwill
Ending balance	(911,096)	(883,527)
Development expenditures | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Development expenditures | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(3,477)	(3,820)
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	1,356	1,466
Reversal		0
Impairment	0
Others	0	(1,123)
Ending balance	(2,121)	(3,477)	(3,820)
Intangible assets under development
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	65,614
Changes in intangible assets other than goodwill
Ending balance	83,555	65,614
Intangible assets under development | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	67,722	81,430
Changes in intangible assets other than goodwill
Acquisition	51,282	39,559
Disposal	0	0
Amortization	0	0
Reversal		(14)
Impairment	0
Others	(32,991)	(53,253)
Ending balance	86,013	67,722	81,430
Intangible assets under development | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	76,625
Changes in intangible assets other than goodwill
Ending balance	94,916	76,625
Intangible assets under development | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Intangible assets under development | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(8,903)
Changes in intangible assets other than goodwill
Ending balance	(8,903)	(8,903)
Intangible assets under development | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(2,108)	(7,326)
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	0	0
Reversal		0
Impairment	0
Others	(350)	5,218
Ending balance	(2,458)	(2,108)	(7,326)
Usage rights of donated assets and other
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	157,143
Changes in intangible assets other than goodwill
Ending balance	145,251	157,143
Usage rights of donated assets and other | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	157,143	169,783
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	(11,857)	(11,394)
Reversal		(150)
Impairment	0
Others	(35)	(1,096)
Ending balance	145,251	157,143	169,783
Usage rights of donated assets and other | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	592,797
Changes in intangible assets other than goodwill
Ending balance	592,739	592,797
Usage rights of donated assets and other | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(435,518)
Changes in intangible assets other than goodwill
Ending balance	(447,352)	(435,518)
Usage rights of donated assets and other | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(136)
Changes in intangible assets other than goodwill
Ending balance	(136)	(136)
Usage rights of donated assets and other | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Leasehold rights
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	4,888
Changes in intangible assets other than goodwill
Ending balance	3,929	4,888
Leasehold rights | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	4,888	5,848
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	(959)	(960)
Reversal		0
Impairment	0
Others	0	0
Ending balance	3,929	4,888	5,848
Leasehold rights | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	28,185
Changes in intangible assets other than goodwill
Ending balance	28,185	28,185
Leasehold rights | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(23,297)
Changes in intangible assets other than goodwill
Ending balance	(24,256)	(23,297)
Leasehold rights | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Leasehold rights | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Greenhouse gas emissions rights
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	43,960
Changes in intangible assets other than goodwill
Ending balance	107,086	43,960
Greenhouse gas emissions rights | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	43,960	78,137
Changes in intangible assets other than goodwill
Acquisition	8,577	57,466
Disposal	(1)	0
Amortization	(2)	0
Reversal		0
Impairment	0
Others	54,552	(91,643)
Ending balance	107,086	43,960	78,137
Greenhouse gas emissions rights | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	43,960
Changes in intangible assets other than goodwill
Ending balance	107,086	43,960
Greenhouse gas emissions rights | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Greenhouse gas emissions rights | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Greenhouse gas emissions rights | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	0
Changes in intangible assets other than goodwill
Ending balance	0	0
Others
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	364,660
Changes in intangible assets other than goodwill
Ending balance	387,766	364,660
Others | Carrying Amount Other than Government Grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	364,727	407,558
Changes in intangible assets other than goodwill
Acquisition	4,136	4,073
Disposal	(119)	(260)
Amortization	(24,895)	(25,017)
Reversal		0
Impairment	(103)
Others	44,342	(21,627)
Ending balance	388,088	364,727	407,558
Others | Acquisition cost
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	551,396
Changes in intangible assets other than goodwill
Ending balance	599,958	551,396
Others | Accumulated amortization
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(174,714)
Changes in intangible assets other than goodwill
Ending balance	(199,865)	(174,714)
Others | Accumulated impairment [member]
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(11,955)
Changes in intangible assets other than goodwill
Ending balance	(12,005)	(11,955)
Others | Government grants
Reconciliation of changes in intangible assets other than goodwill
Beginning balance	(67)	(71)
Changes in intangible assets other than goodwill
Acquisition	0	0
Disposal	0	0
Amortization	93	4
Reversal		0
Impairment	0
Others	(348)	0
Ending balance	₩ (322)	₩ (67)	₩ (71)

Intangible Assets other than _4

Intangible Assets other than Goodwill - Summary of Significant Specific Intangible Assets (Details) ₩ in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2023 KRW (₩)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2023 AUD ($)	Dec. 31, 2022 AUD ($)
Software | ORACLE license for SDIS integrated DB
Disclosure of intangible assets material to entity [line items]
Carrying value			₩ 5,509
Remaining amortisation period of intangible assets material to entity			3 years 4 months
Software | S/4HANA ERP license
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 5,742
Remaining amortisation period of intangible assets material to entity		3 years 11 months
Copyrights, patents rights and other industrial rights | Contributions to APR NRC DC
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 16,697	₩ 20,871
Remaining amortisation period of intangible assets material to entity		4 years	5 years
Mining rights | Mining right of Bylong mine
Disclosure of intangible assets material to entity [line items]
Carrying value | $				$ 0	$ 0
Remaining amortisation period of intangible assets material to entity	[1]	The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.	The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.
Usage rights of donated assets and other | Sejong Haengbogdosi sharing charge
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 13,235	₩ 17,772
Remaining amortisation period of intangible assets material to entity		2 years 11 months	3 years 11 months
Usage rights of donated assets and other | Right of use electricity and gas supply facility (Community district of Songdo)
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 6,853	₩ 7,908
Remaining amortisation period of intangible assets material to entity		6 years 6 months	7 years 6 months
Others | Occupancy and use of public waters
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 70,800	₩ 76,212
Remaining amortisation period of intangible assets material to entity		13 years 1 month	14 years 1 month
Others | Greenhouse gas emissions rights
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 107,086	₩ 43,960
Others | Business rights
Disclosure of intangible assets material to entity [line items]
Carrying value		₩ 148,964	₩ 154,712
Remaining amortisation period of intangible assets material to entity		25 years 11 months	26 years 11 months
[1]The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.

Intangible Assets other than _5

Intangible Assets other than Goodwill - Additional Information (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Research And Development Expense [Abstract]
Research and development expense	₩ 717,561	₩ 727,810	₩ 689,397

Trade and Other Payables - Summ

Trade and Other Payables - Summary of Trade and Other Payables Explanatory (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Trade and other current payables [abstract]
Trade payables	₩ 4,341,482	₩ 7,529,857
Non-trade payables	2,140,906	2,132,838
Accrued expenses	1,859,765	1,605,118
Leasehold deposits received	2,548	2,479
Other deposits received	127,933	97,408
Lease liabilities	612,765	614,037
Dividends payable	4,574	1,812
Advance received from local governments	0	0
Others	0	0
Others	0	0
Trade and other current payables	9,089,973	11,983,549
Trade and other non-current payables [abstract]
Trade payables	0	0
Non-trade payables	1,716,345	2,023,985
Accrued expenses	23,148	6,351
Leasehold deposits received	1,042	35
Other deposits received	33,723	47,863
Lease liabilities	3,195,115	3,549,106
Dividends payable	0	0
Advance received from local governments	3,069	3,477
Others	9,515	8,097
Others	12,584	11,574
Trade and other non-current payables	₩ 4,981,957	₩ 5,638,914

Borrowings and Debt Securitie_2

Borrowings and Debt Securities - Summary of Borrowings And Debt Securities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current Borrowings and Debt Securities
Short-term borrowings	₩ 10,667,335	₩ 8,820,425
Current portion of long-term borrowings	5,780,638	3,638,202
Current portion of debt securities	24,681,439	10,205,395
Less : Current portion of discount on long-term borrowings	(1,152)	(774)
Less : Current portion of discount on debt securities	(7,176)	(4,246)
Add: Current portion of premium on debt securities	263	0
Current Borrowings and Debt Securities	41,121,347	22,659,002
Non-current Borrowings and Debt Securities
Long-term borrowings	3,407,514	2,977,268
Debt securities	89,293,561	95,160,920
Less : Discount on long-term borrowings	(14,683)	(14,945)
Less : Discount on debt securities	(175,909)	(177,543)
Add : Premium on debt securities	0	663
Non-current Borrowings and Debt Securities	92,510,483	97,946,363
Total	₩ 133,631,830	₩ 120,605,365

Borrowings and Debt Securitie_3

Borrowings and Debt Securities - Repayment Schedule of Borrowings and Debt Securities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Repayment schedule of borrowings and debt securities [Line Items]
Borrowings	₩ 19,855,487	₩ 15,435,895
Debt Securities	113,975,000	105,366,315
Less than 1 year
Repayment schedule of borrowings and debt securities [Line Items]
Borrowings	16,447,973	12,458,627
Debt Securities	24,681,439	10,205,395
1~5 Years
Repayment schedule of borrowings and debt securities [Line Items]
Borrowings	1,649,696	1,472,655
Debt Securities	64,342,617	65,278,587
Over 5 Years
Repayment schedule of borrowings and debt securities [Line Items]
Borrowings	1,757,818	1,504,613
Debt Securities	₩ 24,950,944	₩ 29,882,333

Borrowings and Debt Securitie_4

Borrowings and Debt Securities - Short-term Borrowings (Details) $ in Thousands, ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Disclosure of detailed information about Short-term borrowings [Line Items]
Short-term borrowings	₩ 10,667,335	₩ 8,820,425
Local short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	DB Financial Investment and others	DB Financial Investment and others
Short-term borrowings	₩ 6,180,339	₩ 5,549,120	$ 0	$ 0
Local short-term borrowings | Minimum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, interest rate	4%	3.21%	4%	3.21%
Borrowings, maturity	2024.01.05	2023.01.02
Local short-term borrowings | Maximum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, interest rate	4.84%	5.80%	4.84%	5.80%
Borrowings, maturity	2024.12.31	2023.12.31
Foreign short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	Export-Import Bank of Korea	Shinhan Bank
Borrowings, interest rate	5.49%	5.19%	5.49%	5.19%
Borrowings, maturity	2024.09.27	2023.02.28
Short-term borrowings	₩ 51,576	₩ 15,264	$ 40,000,000	$ 12,045,000
Foreign short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	Kookmin Bank	Shinhan Bank
Borrowings, interest rate basis	SOFR(1M)+0.95	SOFR(1M)+0.65
Borrowings, maturity	2024.02.16	2023.02.27
Short-term borrowings	₩ 51,576	₩ 50,692	$ 40,000,000	40,000,000
Foreign short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor		Kookmin Bank and others
Short-term borrowings		₩ 116,333		$ 91,796,000
Foreign short-term borrowings | Minimum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, interest rate		3.32%		3.32%
Borrowings, maturity		2023.01.09
Foreign short-term borrowings | Maximum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, interest rate		5.88%		5.88%
Borrowings, maturity		2023.06.12
Local bank overdraft
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	Woori Bank and others	Woori Bank and others
Borrowings, interest rate basis	Standard overdraft rate+1.37 4.63~5.34	Standard overdraft rate+1.32 4.83
Borrowings, adjustment to interest rate basis	1.37%		1.37%
Short-term borrowings	₩ 3,844	₩ 35,616	$ 0	$ 0
Local bank overdraft | Minimum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	4.63%	1.32%	4.63%	1.32%
Borrowings, maturity	2024.01.05	2023.01.06
Local bank overdraft | Maximum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	5.34%	4.83%	5.34%	4.83%
Borrowings, maturity	2024.02.23	2023.02.24
Local short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	Nonghyup Bank and others	Nonghyup Bank and others
Borrowings, interest rate basis	3M CD +0.98 ~1.12	3M CD+1.11~1.70
Short-term borrowings	₩ 4,300,000	₩ 3,000,000	$ 0	$ 0
Local short-term borrowings | Minimum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	0.98%	1.11%	0.98%	1.11%
Borrowings, maturity	2024.05.26	2023.05.25
Local short-term borrowings | Maximum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.12%	1.70%	1.12%	1.70%
Borrowings, maturity	2024.11.20	2023.11.24
Local short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	Korea Development Bank	Shinhan Bank
Borrowings, interest rate basis	Standard overdraft rate+1.06	6M Bank debenturerate+1.77
Borrowings, adjustment to interest rate basis		1.77%		1.77%
Borrowings, maturity	2024.02.24	2023.11.17
Short-term borrowings	₩ 30,000	₩ 50,000	$ 0	$ 0
Local short-term borrowings | Minimum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.06%		1.06%
Local short-term borrowings
Disclosure of detailed information about Short-term borrowings [Line Items]
Name of Creditor	Export-Import Bank of Korea	Korea Development Bank
Borrowings, interest rate		4.15%		4.15%
Borrowings, interest rate basis	3M Bankdebenturerate+0.34
Borrowings, maturity	2024.12.27	2023.01.06
Short-term borrowings	₩ 50,000	₩ 3,400	$ 0	$ 0
Local short-term borrowings | Maximum
Disclosure of detailed information about Short-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	0.34%		0.34%

Borrowings and Debt Securitie_5

Borrowings and Debt Securities - Long-term Borrowings (Details) € in Millions, ₩ in Millions, ¥ in Millions, JD in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 JOD (JD)	Dec. 31, 2023 JPY (¥)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 AUD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 JOD (JD)	Dec. 31, 2022 JPY (¥)	Dec. 31, 2022 EUR (€)	Dec. 31, 2022 AUD ($)
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings	₩ 9,188,152	₩ 6,615,470
Less: Discount on long-term borrowings	(15,835)	(15,719)
Less: Current portion of long-term borrowings	(5,780,638)	(3,638,202)
Add: Current portion of discount on long-term borrowings	1,152	774
Long-term borrowings	3,392,831	2,962,323
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings	₩ 7,304,875	₩ 4,981,208
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Development Bank	Korea Development Bank
Purpose of borrowings	Others	Others
Borrowings, interest rate	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%
Borrowings	₩ 1,758	₩ 2,133
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity	2024	2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity	2044	2044
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Development Bank	Korea Development Bank
Purpose of borrowings	Facility	Facility
Borrowings	₩ 53,052	₩ 28,420
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	2.60%	2.50%	2.60%	2.60%	2.60%	2.60%	2.60%	2.50%	2.50%	2.50%	2.50%	2.50%
Borrowings, maturity	2025	2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	4.94%	4.60%	4.94%	4.94%	4.94%	4.94%	4.94%	4.60%	4.60%	4.60%	4.60%	4.60%
Borrowings, maturity	2042	2028
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Development Bank	Korea Development Bank
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	CB rate+0.90	CB rate+0.90
Borrowings, maturity	2029	2029
Borrowings	₩ 9,985	₩ 9,985
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Development Bank
Purpose of borrowings	Operating funds	Operating funds
Borrowings, interest rate basis	1yr KDB rate+0.91	1yr KDB rate +0.81~0.91
Borrowings, adjustment to interest rate basis	0.91%		0.91%	0.91%	0.91%	0.91%	0.91%
Borrowings, maturity	2024
Borrowings	₩ 40,000	₩ 54,300
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		0.81%						0.81%	0.81%	0.81%	0.81%	0.81%
Borrowings, maturity		2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		0.91%						0.91%	0.91%	0.91%	0.91%	0.91%
Borrowings, maturity		2024
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Hana Bank and others	Hana Bank and others
Purpose of borrowings	Commercial Paper	Commercial Paper
Borrowings, interest rate basis	3M CD+0.13~1.20	3M CD+0.13~1.20
Borrowings	₩ 5,350,000	₩ 3,250,000
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%
Borrowings, maturity	2024	2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%
Borrowings, maturity	2028	2027
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Hana Bank and others	Hana Bank and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%	4.60%
Borrowings, maturity	2028	2028
Borrowings	₩ 6,558	₩ 8,137
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Hana Bank and others	Hana Bank and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	3yr KTB rate-2.50	3yr KTB rate-1.50
Borrowings, maturity	2028	2028
Borrowings	₩ 3,156	₩ 3,821
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Export-Import Bank of Korea	Export-Import Bank of Korea
Purpose of borrowings	Project loans	Project loans
Borrowings, interest rate	1%	1.50%	1%	1%	1%	1%	1%	1.50%	1.50%	1.50%	1.50%	1.50%
Borrowings, maturity	2026	2026
Borrowings	₩ 7,365	₩ 10,312
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Export-Import Bank of Korea	Export-Import Bank of Korea
Purpose of borrowings	Facility	Facility
Borrowings, interest rate	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%	1.32%
Borrowings, maturity	2028	2028
Borrowings	₩ 80,000	₩ 58,100
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Export-Import Bank of Korea	Export-Import Bank of Korea
Purpose of borrowings	Operating funds	Operating funds
Borrowings, interest rate		1.78%						1.78%	1.78%	1.78%	1.78%	1.78%
Borrowings, interest rate basis	3M Bank debenture rate +0.66
Borrowings, maturity	2026	2023
Borrowings	₩ 40,000	₩ 15,700
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Energy Agency	Korea Energy Agency
Purpose of borrowings	Development of power resources	Development of power resources
Borrowings, interest rate basis	3yr KTB rate-2.25 2.25	3yr KTB rate-2.25 1.50~1.75
Borrowings, adjustment to interest rate basis	2.25%		2.25%	2.25%	2.25%	2.25%	2.25%
Borrowings	₩ 9,176	₩ 11,175
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		1.50%						1.50%	1.50%	1.50%	1.50%	1.50%
Borrowings, maturity	2024	2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		1.75%						1.75%	1.75%	1.75%	1.75%	1.75%
Borrowings, maturity	2028	2028
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Energy Agency	Korea Energy Agency
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	3yr KTB rate-1.50	3yr KTB rate-2.50
Borrowings, maturity	2024
Borrowings	₩ 163	₩ 393
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity		2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity		2024
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Energy Agency	Korea Energy Agency
Purpose of borrowings	Project loans	Project loans
Borrowings, interest rate basis	0	0
Borrowings, maturity	2033
Borrowings	₩ 1,197	₩ 1,197
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity		2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity		2027
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Shinhan Bank and others	Shinhan Bank and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	CB rate+0.90~1.10	CB rate+0.90~1.10
Borrowings	₩ 16,825	₩ 19,195
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%
Borrowings, maturity	2028	2028
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%	1.10%
Borrowings, maturity	2029	2029
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Shinhan Bank and others	Shinhan Bank and others
Purpose of borrowings	Operating funds	Commercial Paper
Borrowings, interest rate basis	6M Bank debenture rate+0.93	3M CD+0.38
Borrowings, maturity	2025	2025
Borrowings	₩ 20,000	₩ 150,000
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Shinhan Bank and others	Shinhan Bank and others
Purpose of borrowings	Commercial Paper	Others
Borrowings, interest rate		3.95%						3.95%	3.95%	3.95%	3.95%	3.95%
Borrowings, interest rate basis	3M CD+0.38
Borrowings, maturity	2025	2034
Borrowings	₩ 150,000	₩ 78,905
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Shinhan Bank and others	Shinhan Bank and others
Purpose of borrowings	Others	Others
Borrowings, interest rate	3.95%		3.95%	3.95%	3.95%	3.95%	3.95%
Borrowings, interest rate basis		Standard overdraft rate+1.00
Borrowings, maturity	2034	2034
Borrowings	₩ 73,425	₩ 78,905
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Shinhan Bank and others	Kookmin Bank
Purpose of borrowings	Others	Facility
Borrowings, interest rate basis	Standard overdraft rate+1.00	MOR+0.79 3M CD+1.79 5.04
Borrowings, maturity	2034
Borrowings	₩ 73,425	₩ 105,155
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity		2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity		2035
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Kookmin Bank	Kookmin Bank
Purpose of borrowings	Facility	Others
Borrowings, interest rate	5.04%	4%	5.04%	5.04%	5.04%	5.04%	5.04%	4%	4%	4%	4%	4%
Borrowings, interest rate basis	1yr Bank debenture rate +0.78 3M CD+1.79~2.10 5.04
Borrowings, maturity		2025
Borrowings	₩ 186,032	₩ 20,700
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.79%		1.79%	1.79%	1.79%	1.79%	1.79%
Borrowings, maturity	2025
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	2.10%		2.10%	2.10%	2.10%	2.10%	2.10%
Borrowings, maturity	2037
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Woori Bank	Woori Bank
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	Standard overdraft rate+1.00 3M CD+1.90 5.04	3M Libor+1.90 5.04
Borrowings	₩ 101,172	₩ 48,823
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		1.90%						1.90%	1.90%	1.90%	1.90%	1.90%
Borrowings, maturity	2034	2035
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		5.04%						5.04%	5.04%	5.04%	5.04%	5.04%
Borrowings, maturity	2042	2042
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	IBK	Others
Purpose of borrowings	Facility	Facility
Borrowings	₩ 30,690	₩ 690,259
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	4%	3.50%	4%	4%	4%	4%	4%	3.50%	3.50%	3.50%	3.50%	3.50%
Borrowings, maturity	2042	2028
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	5.80%	6.80%	5.80%	5.80%	5.80%	5.80%	5.80%	6.80%	6.80%	6.80%	6.80%	6.80%
Borrowings, maturity	2044	2044
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Nonghyup Bank	Others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	3M CD+2.00~2.10	CB rate+1.10 1.75~4.56
Borrowings, adjustment to interest rate basis		1.10%						1.10%	1.10%	1.10%	1.10%	1.10%
Borrowings	₩ 22,517	₩ 103,131
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		1.75%						1.75%	1.75%	1.75%	1.75%	1.75%
Borrowings, adjustment to interest rate basis	2%		2%	2%	2%	2%	2%
Borrowings, maturity	2030	2024
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		4.56%						4.56%	4.56%	4.56%	4.56%	4.56%
Borrowings, adjustment to interest rate basis	2.10%		2.10%	2.10%	2.10%	2.10%	2.10%
Borrowings, maturity	2041	2036
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others	Others
Purpose of borrowings	Facility	PF Refinancing
Borrowings, interest rate basis		CB rate+1.25
Borrowings, maturity		2030
Borrowings	₩ 735,722	₩ 7,634
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	3.50%		3.50%	3.50%	3.50%	3.50%	3.50%
Borrowings, maturity	2028
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	6.80%		6.80%	6.80%	6.80%	6.80%	6.80%
Borrowings, maturity	2042
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others	Others
Purpose of borrowings	Facility	PF Refinancing
Borrowings, interest rate		4.10%						4.10%	4.10%	4.10%	4.10%	4.10%
Borrowings, interest rate basis	CB rate+1.10 3M CD+2.10 1.75~3.30
Borrowings, maturity		2030
Borrowings	₩ 51,509	₩ 21,206
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity	2024
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity	2041
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others	Others
Purpose of borrowings	PF Refinancing	Securitized debts (*)
Borrowings, interest rate basis	CB rate+1.25	3M CD+1.80
Borrowings, maturity	2030	2025
Borrowings	₩ 6,680	₩ 33,476
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others	Others
Purpose of borrowings	PF Refinancing	Others
Borrowings, interest rate	4.10%		4.10%	4.10%	4.10%	4.10%	4.10%
Borrowings, maturity	2030
Borrowings	₩ 18,556	₩ 120,217
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		4.40%						4.40%	4.40%	4.40%	4.40%	4.40%
Borrowings, maturity		2023
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		7.90%						7.90%	7.90%	7.90%	7.90%	7.90%
Borrowings, maturity		2039
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others	Others
Purpose of borrowings	Securitized debts (*)	Others
Borrowings, interest rate basis	3M CD+1.80
Borrowings, maturity	2025
Borrowings	₩ 52,060	₩ 49,929
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		1.80%						1.80%	1.80%	1.80%	1.80%	1.80%
Borrowings, maturity		2031
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		4.50%						4.50%	4.50%	4.50%	4.50%	4.50%
Borrowings, maturity		2034
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others
Purpose of borrowings	Others
Borrowings	₩ 113,973
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	4.40%		4.40%	4.40%	4.40%	4.40%	4.40%
Borrowings, maturity	2025
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	7.90%		7.90%	7.90%	7.90%	7.90%	7.90%
Borrowings, maturity	2039
Local long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Others
Purpose of borrowings	Others
Borrowings	₩ 49,879
Local long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	1.80%		1.80%	1.80%	1.80%	1.80%	1.80%
Borrowings, maturity	2031
Local long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	4.50%		4.50%	4.50%	4.50%	4.50%	4.50%
Borrowings, maturity	2034
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings	₩ 1,883,277	₩ 1,634,262
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Energy Agency	Korea Energy Agency
Purpose of borrowings	Project loans	Project loans
Borrowings, interest rate basis	0	0
Borrowings, maturity	2026	2026
Borrowings	₩ 11,274	₩ 11,081	$ 8,744					$ 8,744
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Export-Import Bankof Korea and others	Export-Import Bank of Korea and others
Purpose of borrowings	Direct Loan and others	Direct Loan and others
Borrowings, interest rate basis	6M Synthetic Libor+1.80~3.20	6M Libor+3.20
Borrowings, maturity	2036	2036
Borrowings	₩ 101,020	₩ 98,969	$ 78,347					78,094
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.80%		1.80%	1.80%	1.80%	1.80%	1.80%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	3.20%		3.20%	3.20%	3.20%	3.20%	3.20%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Export-Import Bankof Korea and others	Export-Import Bank of Korea and others
Purpose of borrowings	Direct Loan and others	Direct Loan and others
Borrowings, interest rate basis	6M Synthetic Libor+2.25~3.70	3M Libor+2.25~3.70
Borrowings, maturity	2027	2027
Borrowings	₩ 113,390	₩ 162,692		JD 62,385					JD 91,051
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	2.25%		2.25%	2.25%	2.25%	2.25%	2.25%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	3.70%		3.70%	3.70%	3.70%	3.70%	3.70%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Export-Import Bankof Korea and others	Export-Import Bank of Korea and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate basis	6M Synthetic Libor+1.70~2.50 SOFR(1M)+1.83	6M Libor+1.70~2.50SOFR(1M) +1.83
Borrowings	₩ 155,909	₩ 167,496	$ 120,916					$ 132,168
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		1.70%						1.70%	1.70%	1.70%	1.70%	1.70%
Borrowings, adjustment to interest rate basis	1.70%		1.70%	1.70%	1.70%	1.70%	1.70%
Borrowings, maturity	2029	2029
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		2.50%						2.50%	2.50%	2.50%	2.50%	2.50%
Borrowings, adjustment to interest rate basis	2.50%		2.50%	2.50%	2.50%	2.50%	2.50%
Borrowings, maturity	2031	2032
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Korea Development Bank and others	Kookmin Bank and others
Purpose of borrowings	EBL	EBL
Borrowings, interest rate basis	SOFR(1M)+0.86	SOFR(1M)+0.11~0.75
Borrowings, adjustment to interest rate basis	0.86%		0.86%	0.86%	0.86%	0.86%	0.86%
Borrowings, maturity	2025	2024
Borrowings	₩ 183,157	₩ 189,578	$ 142,049					$ 149,592
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		0.11%						0.11%	0.11%	0.11%	0.11%	0.11%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		0.75%						0.75%	0.75%	0.75%	0.75%	0.75%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	POSCO and others	Riyad Bank
Purpose of borrowings	Shareholder’s loan	EBL
Borrowings, interest rate basis		SOFR(3M)+1.20
Borrowings, maturity	2025	2025
Borrowings	₩ 13,887	₩ 63,201	$ 10,770					$ 49,870
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	5.60%		5.60%	5.60%	5.60%	5.60%	5.60%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	8%		8%	8%	8%	8%	8%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	POSCO and others	POSCO and others
Purpose of borrowings	Shareholder’s loan	Shareholder’s loan
Borrowings, interest rate	8%	8%	8%	8%	8%	8%	8%	8%	8%	8%	8%	8%
Borrowings, maturity	2031	2025
Borrowings	₩ 9,850	₩ 12,680		JD 5,419				$ 10,005
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Samsung Life Insurance and others	POSCO and others
Purpose of borrowings	Syndicated Loan	Shareholder’s loan
Borrowings, interest rate		8%						8%	8%	8%	8%	8%
Borrowings, maturity	2032	2031
Borrowings	₩ 39,707	₩ 8,671			¥ 4,350,671				JD 4,853
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	3.10%		3.10%	3.10%	3.10%	3.10%	3.10%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate	8%		8%	8%	8%	8%	8%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Woori Bank and others	Samsung Life Insurance and others
Purpose of borrowings	Syndicated Loan	Syndicated Loan
Borrowings, interest rate basis	JPY 6M Tibor+1.84
Borrowings, maturity	2032	2032
Borrowings	₩ 21,896	₩ 45,304			¥ 2,399,088					¥ 4,752,934
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		3.10%						3.10%	3.10%	3.10%	3.10%	3.10%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		8%						8%	8%	8%	8%	8%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Solar Construction Lending, LLC	Woori Bank and others
Purpose of borrowings	Facility	Syndicated Loan
Borrowings, interest rate	5%		5%	5%	5%	5%	5%
Borrowings, interest rate basis		JPY 6M Libor+1.84
Borrowings, maturity	2025	2032
Borrowings	₩ 38,545	₩ 24,910	$ 29,894							¥ 2,613,385
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	KiwoomSolar Power Professional Investor Private Placement Investment Trust V	Solar Construction Lendings, LLC
Purpose of borrowings	Senior borrowing	Facility
Borrowings, interest rate	3.90%	5%	3.90%	3.90%	3.90%	3.90%	3.90%	5%	5%	5%	5%	5%
Borrowings, maturity	2029	2025
Borrowings	₩ 57,745	₩ 39,464				€ 40,478		$ 31,140
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	IFC and others	KiwoomSolar Power Professional Investor Private Placement Investment Trust V
Purpose of borrowings	Facility	Senior borrowing
Borrowings, interest rate		3.90%						3.90%	3.90%	3.90%	3.90%	3.90%
Borrowings, interest rate basis	SOFR(3M)+1.99 SOFR(6M)+5.00 3M BSBY+1.70 6.05~6.62
Borrowings, maturity		2029
Borrowings	₩ 845,746	₩ 54,765	$ 655,922								€ 40,531
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity	2024
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, maturity	2031
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Hanwha US Solar Private Fund and others	IFC and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate	6%		6%	6%	6%	6%	6%
Borrowings, interest rate basis		6M Libor+5.00 SOFR(3M)+1.83~1.99 5.41~6.19
Borrowings, maturity	2039
Borrowings	₩ 78,233	₩ 517,575	$ 60,674					$ 408,408
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		5.41%						5.41%	5.41%	5.41%	5.41%	5.41%
Borrowings, adjustment to interest rate basis		1.83%						1.83%	1.83%	1.83%	1.83%	1.83%
Borrowings, maturity		2028
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, interest rate		6.19%						6.19%	6.19%	6.19%	6.19%	6.19%
Borrowings, adjustment to interest rate basis		1.99%						1.99%	1.99%	1.99%	1.99%	1.99%
Borrowings, maturity		2031
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	DBS Bank and others	Hanwha US Solar Private Fund and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate		3%						3%	3%	3%	3%	3%
Borrowings, interest rate basis	1M BBSY+1.40~2.25
Borrowings, maturity	2025	2038
Borrowings	₩ 162,891	₩ 73,894					$ 185,086	$ 58,308
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	1.40%		1.40%	1.40%	1.40%	1.40%	1.40%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis	2.25%		2.25%	2.25%	2.25%	2.25%	2.25%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor	Nonghyup Bank and others	DBS Bank and others
Purpose of borrowings	Facility	Facility
Borrowings, interest rate	10.40%		10.40%	10.40%	10.40%	10.40%	10.40%
Borrowings, interest rate basis		1M BBSY+1.40~2.25
Borrowings, maturity	2039	2025
Borrowings	₩ 50,027	₩ 163,836	$ 38,799									$ 190,860
Foreign long-term borrowings | Minimum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		1.40%						1.40%	1.40%	1.40%	1.40%	1.40%
Foreign long-term borrowings | Maximum
Disclosure of detailed information about Long-term borrowings [Line Items]
Borrowings, adjustment to interest rate basis		2.25%						2.25%	2.25%	2.25%	2.25%	2.25%
Foreign long-term borrowings
Disclosure of detailed information about Long-term borrowings [Line Items]
Name of Creditor		Others
Purpose of borrowings		Others
Borrowings, interest rate basis		0
Borrowings, maturity		0
Borrowings		₩ 146						$ 116

Borrowings and Debt Securitie_6

Borrowings and Debt Securities - Local Debt Securities and Foreign Debt Securities (Details) € in Thousands, kr in Thousands, SFr in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 SEK (kr)	Dec. 31, 2023 HKD ($)	Dec. 31, 2023 CHF (SFr)	Dec. 31, 2023 AUD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)	Dec. 31, 2022 SEK (kr)	Dec. 31, 2022 HKD ($)	Dec. 31, 2022 CHF (SFr)	Dec. 31, 2022 AUD ($)
Local Debt securities
Debt Instrument [Line Items]
Notional amount	₩ 97,658,931	₩ 90,494,766
Less: Discount on debt securities	(54,826)	(56,924)
Less: Current portion of foreign debt securities	(23,141,584)	(8,401,619)
Add: Current portion of discount on debt securities	4,712	2,344
Total	₩ 74,467,233	82,038,567
Electricity Bonds
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2012.03.27~2023.09.11
Notional amount	₩ 67,730,000	61,190,000
Electricity Bonds | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2023.01.08~2052.04.21
Borrowings, interest rate	1.43%		1.43%	1.43%	1.43%	1.43%	1.43%	1.43%
Electricity Bonds | Maximum
Debt Instrument [Line Items]
Borrowings, interest rate	5.99%		5.99%	5.99%	5.99%	5.99%	5.99%	5.99%
Corporate bonds
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2009.10.16~2023.12.21
Notional amount	₩ 29,887,353	29,293,188
Corporate bonds | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2024.01.12~2053.11.10
Borrowings, interest rate	1.21%		1.21%	1.21%	1.21%	1.21%	1.21%	1.21%
Corporate bonds | Maximum
Debt Instrument [Line Items]
Borrowings, interest rate	10%		10%	10%	10%	10%	10%	10%
Corporate bonds
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2021.05.26~2023.12.28
Borrowings, maturity	2041.05.25~2043.09.15
Notional amount	₩ 41,578	11,578
Corporate bonds | Minimum
Debt Instrument [Line Items]
Borrowings, interest rate	2%		2%	2%	2%	2%	2%	2%
Corporate bonds | Maximum
Debt Instrument [Line Items]
Borrowings, interest rate	3.78%		3.78%	3.78%	3.78%	3.78%	3.78%	3.78%
Foreign Debt securities
Debt Instrument [Line Items]
Notional amount	₩ 16,316,069	14,871,549
Less: Discount on debt securities	(128,259)	(124,865)
Add: Premium on foreign debt securities	263	663
Less: Current portion of foreign debt securities	(1,539,855)	(1,803,776)
Add: Current portion of discount on debt securities	2,464	1,902
Less: Current portion of premium on foreign debt securities	(263)
Total	₩ 14,650,419	₩ 12,945,473
FY-96
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	1996.04.01~1996.12.06	1996.04.01~1996.12.06
Notional amount	₩ 359,357	₩ 353,198	$ 278,701						$ 278,701
FY-96 | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2026.12.01	2026.12.01
Borrowings, interest rate	6%	6%	6%	6%	6%	6%	6%	6%	6%	6%	6%	6%	6%	6%
FY-96 | Maximum
Debt Instrument [Line Items]
Borrowings, maturity	2096.04.01	2096.04.01
Borrowings, interest rate	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%
FY-97
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	1997.01.31~1997.08.04	1997.01.31~1997.08.04
Notional amount	₩ 405,796	₩ 398,841	$ 314,717						$ 314,717
FY-97 | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2027.02.01	2027.02.01
Borrowings, interest rate	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
FY-97 | Maximum
Debt Instrument [Line Items]
Borrowings, maturity	2027.08.01	2027.08.01
Borrowings, interest rate	7%	7%	7%	7%	7%	7%	7%	7%	7%	7%	7%	7%	7%	7%
FY-04
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2004.04.23	2004.04.23
Borrowings, maturity	2034.04.23	2034.04.23
Borrowings, interest rate	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%	5.13%
Notional amount	₩ 369,955	₩ 363,614	$ 286,920						$ 286,920
FY-14
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2014.07.30	2014.07.30
Borrowings, maturity	2029.07.30	2029.07.30
Borrowings, interest rate	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%	3.57%
Notional amount	₩ 128,940	₩ 126,730	$ 100,000						$ 100,000
FY-15
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2015.06.15	2015.06.15
Borrowings, maturity	2025.06.15	2025.06.15
Borrowings, interest rate	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-17
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2017.07.25	2017.07.25
Borrowings, maturity	2027.07.25	2027.07.25
Borrowings, interest rate	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%	3.13%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-17
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2017.10.30	2017.10.30
Borrowings, maturity	2037.10.30	2037.10.30
Borrowings, interest rate	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%
Notional amount	₩ 57,064	₩ 54,048		€ 40,000						€ 40,000
FY-17
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2017.11.16	2017.11.16
Borrowings, maturity	2037.11.16	2037.11.16
Borrowings, interest rate	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%	2.36%
Notional amount	₩ 58,050	₩ 54,527			kr 450,000						kr 450,000
FY-18
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2018.03.13	2018.03.13
Borrowings, maturity	2028.03.13	2028.03.13
Borrowings, interest rate	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%
Notional amount	₩ 272,349	₩ 268,208				$ 1,650,000						$ 1,650,000
FY-18
Debt Instrument [Line Items]
Debt Instrument, Issuance Date		2018.06.07~2018.07.25
Notional amount		₩ 1,774,220							$ 1,400,000
FY-18 | Minimum
Debt Instrument [Line Items]
Borrowings, maturity		2023.06.07
Borrowings, interest rate		3.75%							3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
FY-18 | Maximum
Debt Instrument [Line Items]
Borrowings, maturity		2023.07.25
Borrowings, interest rate		3.88%							3.88%	3.88%	3.88%	3.88%	3.88%	3.88%
FY-19
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2019.02.27	2019.02.27
Borrowings, maturity	2024.02.27	2024.02.27
Borrowings, interest rate	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%	0.13%
Notional amount	₩ 305,364	₩ 274,574					SFr 200,000						SFr 200,000
FY-19
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2019.06.24	2019.06.24
Borrowings, maturity	2024.06.24	2024.06.24
Borrowings, interest rate	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Notional amount	₩ 644,700	₩ 633,650	$ 500,000						$ 500,000
FY-19
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2019.07.19	2019.07.19
Notional amount	₩ 458,046	₩ 411,861					SFr 300,000						SFr 300,000
FY-19 | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2024.07.19	2024.07.19
Borrowings, interest rate	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
FY-19 | Maximum
Debt Instrument [Line Items]
Borrowings, maturity	2027.07.19	2027.07.19
Borrowings, interest rate	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%
FY-19
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2019.10.30	2019.10.30
Borrowings, maturity	2024.10.30	2024.10.30
Interest rate (%)	3M BBSW+0.97	3M BBSW+0.97
Notional amount	₩ 264,024	₩ 257,523						$ 300,000						$ 300,000
FY-19
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2019.12.19	2019.12.19
Borrowings, maturity	2037.12.31	2037.12.31
Notional amount	₩ 441,946	₩ 457,368	$ 342,753						$ 360,899
FY-19 | Minimum
Debt Instrument [Line Items]
Borrowings, interest rate	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%
FY-19 | Maximum
Debt Instrument [Line Items]
Borrowings, interest rate	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%	5.70%
FY-20
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2020.02.03	2020.02.03
Borrowings, maturity	2025.02.03	2025.02.03
Borrowings, interest rate	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%	2.13%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-20
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2020.05.06	2020.05.06
Borrowings, maturity	2025.05.06	2025.05.06
Borrowings, interest rate	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%	1.75%
Notional amount	₩ 644,700	₩ 633,650	$ 500,000						$ 500,000
FY-20
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2020.06.15	2020.06.15
Borrowings, maturity	2025.06.15	2025.06.15
Borrowings, interest rate	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Notional amount	₩ 644,700	₩ 633,650	$ 500,000						$ 500,000
FY-20
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2020.08.03	2020.08.03
Borrowings, maturity	2026.02.03	2026.02.03
Borrowings, interest rate	1%	1%	1%	1%	1%	1%	1%	1%	1%	1%	1%	1%	1%	1%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-21
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2021.01.27	2021.01.27
Borrowings, maturity	2026.01.27	2026.01.27
Borrowings, interest rate	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Notional amount	₩ 580,230	₩ 570,285	$ 450,000						$ 450,000
FY-21
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2021.04.27	2021.04.27
Borrowings, maturity	2026.04.27	2026.04.27
Borrowings, interest rate	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%
Notional amount	₩ 644,700	₩ 633,650	$ 500,000						$ 500,000
FY-21
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2021.08.09	2021.08.09
Borrowings, maturity	2026.08.09	2026.08.09
Borrowings, interest rate	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%	1.25%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-21
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2021.09.24	2021.09.24
Borrowings, maturity	2026.09.24	2026.09.24
Borrowings, interest rate	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%	1.13%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.04.21	2022.04.21
Borrowings, maturity	2027.04.21	2027.04.21
Borrowings, interest rate	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.05.06	2022.05.06
Borrowings, maturity	2025.05.06	2025.05.06
Borrowings, interest rate	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%	3.60%
Notional amount	₩ 644,700	₩ 633,650	$ 500,000						$ 500,000
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.06.14	2022.06.14
Notional amount	₩ 1,031,520	₩ 1,013,840	$ 800,000						$ 800,000
FY-22 | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2025.06.14	2025.06.14
Borrowings, interest rate	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%	3.63%
FY-22 | Maximum
Debt Instrument [Line Items]
Borrowings, maturity	2027.06.14	2027.06.14
Borrowings, interest rate	4%	4%	4%	4%	4%	4%	4%	4%	4%	4%	4%	4%	4%	4%
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.06.28	2022.06.28
Borrowings, maturity	2025.06.28	2025.06.28
Borrowings, interest rate	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%	4.13%
Notional amount	₩ 386,820	₩ 380,190	$ 300,000						$ 300,000
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.07.27	2022.07.27
Borrowings, maturity	2027.07.27	2027.07.27
Borrowings, interest rate	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%
Notional amount	₩ 902,580	₩ 887,110	$ 700,000						$ 700,000
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.10.06	2022.10.06
Notional amount	₩ 1,031,520	₩ 1,013,840	$ 800,000						$ 800,000
FY-22 | Minimum
Debt Instrument [Line Items]
Borrowings, maturity	2026.04.06	2026.04.06
Borrowings, interest rate	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
FY-22 | Maximum
Debt Instrument [Line Items]
Borrowings, maturity	2028.04.06	2028.04.06
Borrowings, interest rate	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
FY-22
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2022.10.06~2022.11.01	2022.10.06~2022.11.01
Borrowings, maturity	2032.10.06	2032.10.06
Borrowings, interest rate	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%	5.16%
Notional amount	₩ 387,891	₩ 381,992				$ 2,350,000						$ 2,350,000
FY-23
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2023.06.07
Borrowings, maturity	2030.06.07
Borrowings, interest rate	4.51%		4.51%	4.51%	4.51%	4.51%	4.51%	4.51%
Notional amount	₩ 171,167					$ 1,037,000
FY-23
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2023.07.12
Borrowings, maturity	2028.07.12
Borrowings, interest rate	4.88%		4.88%	4.88%	4.88%	4.88%	4.88%	4.88%
Notional amount	₩ 451,290		$ 350,000
FY-23
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2023.07.18
Borrowings, maturity	2028.07.18
Borrowings, interest rate	5%		5%	5%	5%	5%	5%	5%
Notional amount	₩ 644,700		$ 500,000
FY-23
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2023.07.31
Borrowings, maturity	2026.07.31
Borrowings, interest rate	5.38%		5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Notional amount	₩ 1,289,400		$ 1,000,000
FY-23
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	2023.09.21
Borrowings, maturity	2026.09.21
Borrowings, interest rate	5.38%		5.38%	5.38%	5.38%	5.38%	5.38%	5.38%
Notional amount	₩ 386,820		$ 300,000

Borrowings and Debt Securitie_7

Borrowings and Debt Securities - Local Debt Securities and Foreign Debt Securities (Parenthetical) (Details) - Hee mang sunlight Power Co., Ltd [Member] ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Debt Instrument [Line Items]
Value of bonds entitled to premature redemption	₩ 1,584
Premature redemption due date	Mar. 31, 2021

Borrowings and Debt Securitie_8

Borrowings and Debt Securities - Schedule of Changes in Borrowings and Debt Securities (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes In Borrowings and Debt Securities [Line Items]
Beginning balance	₩ 120,605,365
Ending balance	133,631,830	₩ 120,605,365
Borrowings and debt securities
Changes In Borrowings and Debt Securities [Line Items]
Beginning balance	120,605,365	80,529,513
Cash flows	12,692,924	39,193,816
Effect of exchange rate fluctuations	335,353	906,877
Others	(1,812)	(24,841)
Ending balance	₩ 133,631,830	₩ 120,605,365

Leases - Additional Information

Leases - Additional Information (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statements [Line Items]
Expense relating to short-term leases for which recognition exemption has been used	₩ 172,711	₩ 235,473
Expense relating to leases of low-value assets for which recognition exemption has been used	4,659	3,147
Cash outflow related to leases	901,041	1,005,014
Discounted unguaranteed residual value of assets	₩ 25,521	₩ 22,910
Maximum
Statements [Line Items]
Implicit interest rate on finance lease	17.03%	17.08%
Minimum
Statements [Line Items]
Implicit interest rate on finance lease	0%	0%
Power Purchase Agreement | Maximum
Statements [Line Items]
Lease term of finance lease	11 years
Power Purchase Agreement | Minimum
Statements [Line Items]
Lease term of finance lease	2 years
Jordan Electric Power Company | Power Purchase Agreement
Statements [Line Items]
Lease term of finance lease	25 years
Fujeij Wind Power Plant | Power Purchase Agreement
Statements [Line Items]
Lease term of finance lease	20 years
Federal Electricity Commission | Power Purchase Agreement
Statements [Line Items]
Lease term of finance lease	25 years

Leases - Summary of Right-of-Us

Leases - Summary of Right-of-Use Assets (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Disclosure of quantitative information about right-of-use assets [line items]
Depreciation		₩ (536,517)		₩ (509,068)
Right-of-use assets
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		3,711,125		4,059,397
Increase		261,862		197,016
Depreciation		(536,517)		(509,068)
Decrease		(2,613)		(2,838)
Others		(70,114)		(33,382)
Ending balance		3,363,743		3,711,125
Right-of-use assets | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		5,992,724
Ending balance		6,041,794		5,992,724
Right-of-use assets | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(2,281,599)
Ending balance		(2,678,051)		(2,281,599)
Land
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		661,799		652,795
Increase		2,696		63,654
Depreciation		(57,461)		(41,260)
Decrease		(126)		0
Others		48,952		(13,390)
Ending balance		655,860		661,799
Land | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		886,076
Ending balance		937,481		886,076
Land | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(224,277)
Ending balance		(281,621)		(224,277)
Buildings
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		74,856		62,884
Increase		24,622		42,399
Depreciation		(32,591)		(30,243)
Decrease		(904)		(1,042)
Others		24,590		858
Ending balance		90,573		74,856
Buildings | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		135,290
Ending balance		188,017		135,290
Buildings | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(60,434)
Ending balance		(97,444)		(60,434)
Structures
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		23,965		21,148
Increase		49		4,256
Depreciation		(2,471)		(1,758)
Decrease		(273)		0
Others		16,086		319
Ending balance		37,356		23,965
Structures | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		30,879
Ending balance		46,573		30,879
Structures | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(6,914)
Ending balance		(9,217)		(6,914)
Machinery
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		835		565
Increase		0		429
Depreciation		(94)		(159)
Decrease		0		0
Others		5,202		0
Ending balance		5,943		835
Machinery | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		1,737
Ending balance		26,453		1,737
Machinery | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(902)
Ending balance		(20,510)		(902)
Ships
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		2,596,863		3,029,219
Increase		199,538		0
Depreciation		(382,298)		(393,677)
Decrease		0		0
Others		(100,798)		(38,679)
Ending balance		2,313,305		2,596,863
Ships | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		4,151,460
Ending balance		4,137,168		4,151,460
Ships | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(1,554,597)
Ending balance		(1,823,863)		(1,554,597)
Vehicles
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		14,716		13,618
Increase		21,097		13,475
Depreciation		(10,464)		(8,673)
Decrease		(1,008)		(962)
Others		1,150		(2,742)
Ending balance		25,491		14,716
Vehicles | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		35,712
Ending balance		59,208		35,712
Vehicles | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		(20,996)
Ending balance		(33,717)		(20,996)
Others
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance		338,091	[1]	279,168
Increase		13,860		72,803
Depreciation		(51,138)		(33,298)
Decrease		(302)		(834)
Others		(65,296)		20,252
Ending balance	[1]	235,215		338,091
Others | Acquisition cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance	[1]	751,570
Ending balance	[1]	646,894		751,570
Others | Accumulated depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance	[1]	(413,479)
Ending balance	[1]	₩ (411,679)		₩ (413,479)
[1]Including a power purchase agreement (“PPA”) with CGN Yulchon Generation Co., Ltd.

Leases - Summary of Lease Liabi

Leases - Summary of Lease Liabilities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Gross lease liabilities	₩ 4,235,100	₩ 4,612,352
Less: Discount	(427,220)	(449,209)
Present value of lease payment	3,807,880	4,163,143	₩ 4,410,503
Less than 1 year
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Gross lease liabilities	641,525	639,756
1~5 Years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Gross lease liabilities	1,898,846	2,047,584
More than 5 years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Gross lease liabilities	₩ 1,694,729	₩ 1,925,012

Leases - Summary of Liquidity C

Leases - Summary of Liquidity Classification of Lease Liabilities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lease liabilities [abstract]
Current lease liabilities	₩ 612,765	₩ 614,037
Non-current lease liabilities	3,195,115	3,549,106
Total lease liabilities	₩ 3,807,880	₩ 4,163,143	₩ 4,410,503

Leases - Summary of Changes in

Leases - Summary of Changes in Lease Liabilities (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Disclosure - Changes in lease liabilities [Abstract]
Beginning balance		₩ 4,163,143	₩ 4,410,503
Increase		253,495	109,019
Decrease		(661,665)	(654,236)
Interest expenses		87,426	91,590
Others	[1]	(34,519)	206,267
Ending balance		₩ 3,807,880	₩ 4,163,143
[1]Including translation effect of foreign currency lease liabilities and others.

Leases - Summary of Details of

Leases - Summary of Details of Expense Relating to Lease Contracts As Lessee (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure - Details of expense relating to lease contracts as lessee [Abstract]
Depreciation of right-of-use assets	₩ 536,517	₩ 509,068
Interest expense on lease liabilities	87,426	91,590
Leases expenses for short-term leases	172,711	235,473
Leases expenses for leases of low-value assets	4,659	3,147
Variable lease payments	62,006	112,158
Total expense relating to lease contracts as lessee	₩ 863,319	₩ 951,436

Leases - Summary of Profit and

Leases - Summary of Profit and Loss Related To Finance Lease (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of quantitative information about leases for lessor [abstract]
Finance income on the net investment in the lease	₩ 118,695	₩ 122,355

Leases - Summary of Maturity An

Leases - Summary of Maturity Analysis of Finance Lease Payments Receivable (Details) - Gross amount - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		₩ 2,306,595	₩ 2,378,664
Less : Unearned finance income		(1,057,434)	(1,139,274)
Net investment in finance lease	[1]	1,249,161	1,239,390
Not Later Than 1 Year
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		189,779	181,930
1~2 Years
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		182,743	169,693
2~3 Years
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		179,428	166,787
3~4 Years
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		178,074	166,196
4~5 Years
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		168,221	166,965
More than 5 years
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted finance lease payments to be received		₩ 1,408,350	₩ 1,527,093
[1]Including the present value of unguaranteed residual value amounting to ￦22,910 million and ￦25,521 million, as of December 31, 2022 and 2023, respectively.

Leases - Summary of Changes i_2

Leases - Summary of Changes in Allowance For Doubtful Accounts of Finance Lease Receivables (Details) - Finance lease receivables - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets [line items]
Beginning balance	₩ 4,505	₩ 768
Bad debt expense	751	3,737
Ending balance	₩ 5,256	₩ 4,505

Employment Benefits - Summary o

Employment Benefits - Summary of Employment Benefits (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of net defined benefit liability (asset) [abstract]
Net defined benefit asset	₩ 70,187	₩ 198,626
Net defined benefit obligations	1,033,409	825,927
Other long-term employee benefit obligations	₩ 1,911	₩ 2,794

Employment Benefits - Summary_2

Employment Benefits - Summary of Principal Assumptions on Actuarial Valuation (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement [Line Items]
Future salary and benefit levels	4.82%	4.55%
Weighted average duration	9 years 6 months 7 days	8 years 10 months 2 days
Bottom of range [member]
Statement [Line Items]
Discount rate	4.06%	5.16%
Top of range [member]
Statement [Line Items]
Discount rate	5.44%	5.19%

Employment Benefits - Summary_3

Employment Benefits - Summary of Expense Relating to defined Benefit Plans (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure - Details of expense relating to defined benefit plans [Abstract]
Current service cost	₩ 373,802	₩ 496,722	₩ 524,942
Interest cost	190,257	116,256	91,877
Expected return on plan assets	(163,074)	(73,484)	(52,782)
Past service cost	0	125	5,483
Defined benefit	₩ 400,985	₩ 539,619	₩ 569,520

Employment Benefits - Summary_4

Employment Benefits - Summary of Expense Relating to Defined Benefit Plans by Nature (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of defined benefit plans [line items]
Defined benefit	₩ 400,985	₩ 539,619	₩ 569,520
Cost of sales [member]
Disclosure of defined benefit plans [line items]
Defined benefit	285,209	404,243	416,287
Selling, general and administrative expense [member]
Disclosure of defined benefit plans [line items]
Defined benefit	73,521	81,457	95,983
Others (Construction-in-progress and others) [member]
Disclosure of defined benefit plans [line items]
Defined benefit	₩ 42,255	₩ 53,919	₩ 57,250

Employment Benefits - Summary_5

Employment Benefits - Summary of Defined Benefits (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Surplus (deficit) in plan [abstract]
Present value of defined benefit obligation from funded plans	₩ 4,312,702	₩ 3,776,715
Fair value of plan assets	(3,349,480)	(3,149,414)
Net liabilities incurred from defined benefit plans	₩ 963,222	₩ 627,301

Employment Benefits - Net Defin

Employment Benefits - Net Defined Benefit Liability and Asset (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of defined benefit plans [line items]
Beginning balance	₩ (825,927)
Changes in net defined benefit liability (asset)
Current service cost	373,802	₩ 496,722	₩ 524,942
Remeasurement component	404,858	(1,001,118)
Past service cost	0	125	5,483
Ending balance	(1,033,409)	(825,927)
Defined benefit obligation
Disclosure of defined benefit plans [line items]
Beginning balance	3,776,715	4,564,417
Changes in net defined benefit liability (asset)
Current service cost	373,802	496,722
Interest cost	190,257	116,256
Remeasurement component	409,635	(1,012,727)
Past service cost	0	125
Actual payments	(437,734)	(388,105)
Others	27	27
Ending balance	4,312,702	3,776,715	4,564,417
Plan assets
Disclosure of defined benefit plans [line items]
Beginning balance	3,149,414	2,909,547
Changes in net defined benefit liability (asset)
Interest cost	163,074	73,484
Remeasurement component	4,777	(11,609)
Contributions by the employers	188,566	347,778
Actual payments	(156,351)	(169,786)
Ending balance	₩ 3,349,480	₩ 3,149,414	₩ 2,909,547

Employment Benefits - Summary_6

Employment Benefits - Summary of the Fair Value of Plan Assets (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Disclosure of fair value of plan assets [abstract]
Equity instruments		₩ 5,326	₩ 171,301
Debt instruments		697,907	854,640
Bank deposits		611,821	590,103
Others	[1]	2,034,426	1,533,370
Plan assets		₩ 3,349,480	₩ 3,149,414
[1]‘Others’ consist of various financial assets managed by external asset management companies.

Employment Benefits - Summary_7

Employment Benefits - Summary of Remeasurement Components Recognized in Other Comprehensive Income (loss) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income [abstract]
Actuarial gain from changes in financial assumptions	₩ 429,810	₩ (967,366)
Experience adjustments	(20,175)	(45,361)
Expected return	(4,777)	11,609
Total loss (gain) on remeasurement, net defined benefit liability (asset)	₩ 404,858	₩ (1,001,118)

Employment Benefits - Additiona

Employment Benefits - Additional Information (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Employment Benefit Obligations [Line Items]
Gain on accumulated remeasurement components	₩ 29,229	₩ 614,805
Return on plan assets	167,851	61,875
Cost of sales
Disclosure Of Employment Benefit Obligations [Line Items]
Employee benefit expense	85,560	101,369	₩ 71,976
Selling and administrative expense
Disclosure Of Employment Benefit Obligations [Line Items]
Employee benefit expense	16,012	28,301	17,144
Construction In Process And Others
Disclosure Of Employment Benefit Obligations [Line Items]
Employee benefit expense	₩ 15,639	₩ 14,827	₩ 13,025

Provisions (Details)

Provisions (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of changes in other provisions
Beginning balance	₩ 28,791,693	₩ 25,347,300
Changes in other provisions
Increase in provision	4,646,936	6,673,486
Payment	(2,752,599)	(3,043,445)
Reversal of unused amount	(2,152,129)	(66,913)
Others	1,268	(118,735)
Ending balance	28,535,169	28,791,693
Current provisions	2,654,125	2,427,051
Non-current provisions	25,881,044	26,364,642
Provisions for employment benefits
Reconciliation of changes in other provisions
Beginning balance	1,045,058	1,048,939
Changes in other provisions
Increase in provision	834,102	997,281
Payment	(877,933)	(1,001,283)
Reversal of unused amount	(1,536)	0
Others	0	121
Ending balance	999,691	1,045,058
Current provisions	999,691	1,045,058
Non-current provisions	0	0
Litigation provisions
Reconciliation of changes in other provisions
Beginning balance	181,179	114,718
Changes in other provisions
Increase in provision	151,189	112,797
Payment	(67,478)	(39,633)
Reversal of unused amount	(87,872)	(6,360)
Others	0	(343)
Ending balance	177,018	181,179
Current provisions	5,299	26,974
Non-current provisions	171,719	154,205
Provisions For Nuclear Plants Restoration
Reconciliation of changes in other provisions
Beginning balance	23,035,427	19,461,461
Changes in other provisions
Increase in provision	572,379	3,630,830
Payment	(62,035)	(56,813)
Reversal of unused amount	(1,898,935)	0
Others	51	(51)
Ending balance	21,646,887	23,035,427
Current provisions	81,684	0
Non-current provisions	21,565,203	23,035,427
Spent fuel recovery provisions
Reconciliation of changes in other provisions
Beginning balance	1,426,918	1,350,662
Changes in other provisions
Increase in provision	1,877,827	493,943
Payment	(379,011)	(417,687)
Reversal of unused amount	0	0
Others	0	0
Ending balance	2,925,734	1,426,918
Current provisions	940,585	415,890
Non-current provisions	1,985,149	1,011,028
Radioactive waste recovery provisions
Reconciliation of changes in other provisions
Beginning balance	1,990,007	1,832,535
Changes in other provisions
Increase in provision	89,054	221,629
Payment	(86,823)	(64,157)
Reversal of unused amount	(84,153)	0
Others	0	0
Ending balance	1,908,085	1,990,007
Current provisions	67,572	94,158
Non-current provisions	1,840,513	1,895,849
PCBs recovery provisions
Reconciliation of changes in other provisions
Beginning balance	88,359	103,665
Changes in other provisions
Increase in provision	1,699	1,949
Payment	(17,100)	(17,156)
Reversal of unused amount	(15,014)	(99)
Others	0	0
Ending balance	57,944	88,359
Current provisions	0	0
Non-current provisions	57,944	88,359
Other recovery provisions
Reconciliation of changes in other provisions
Beginning balance	32,770	30,231
Changes in other provisions
Increase in provision	1,319	2,093
Payment	(432)	(165)
Reversal of unused amount	0	(751)
Others	2,425	1,362
Ending balance	36,082	32,770
Current provisions	0	0
Non-current provisions	36,082	32,770
Power plant regional support program provisions
Reconciliation of changes in other provisions
Beginning balance	144,504	146,588
Changes in other provisions
Increase in provision	51,814	52,470
Payment	(66,284)	(54,554)
Reversal of unused amount	0	0
Others	0	0
Ending balance	130,034	144,504
Current provisions	130,034	144,504
Non-current provisions	0	0
Transmission regional support program provisions
Reconciliation of changes in other provisions
Beginning balance	239,235	250,288
Changes in other provisions
Increase in provision	177,520	176,424
Payment	(160,749)	(187,477)
Reversal of unused amount	0	0
Others	0	0
Ending balance	256,006	239,235
Current provisions	256,006	239,235
Non-current provisions	0	0
Provisions for financial guarantee
Reconciliation of changes in other provisions
Beginning balance	67,240	80,841
Changes in other provisions
Increase in provision	10,215	4,738
Payment	(25,174)	(17,789)
Reversal of unused amount	(2,251)	0
Others	(38)	(550)
Ending balance	49,992	67,240
Current provisions	25,534	22,895
Non-current provisions	24,458	44,345
Provisions for RPS
Reconciliation of changes in other provisions
Beginning balance	24,339	0
Changes in other provisions
Increase in provision	620,855	587,586
Payment	(609,120)	(556,993)
Reversal of unused amount	0	(6,254)
Others	0	0
Ending balance	36,074	24,339
Current provisions	36,074	24,339
Non-current provisions	0	0
Provisions for greenhouse gas emissions obligations
Reconciliation of changes in other provisions
Beginning balance	298,876	655,544
Changes in other provisions
Increase in provision	77,207	387,299
Payment	(298,859)	(590,172)
Reversal of unused amount	(58,552)	(33,596)
Others	0	(120,199)
Ending balance	18,672	298,876
Current provisions	18,672	298,876
Non-current provisions	0	0
Others
Reconciliation of changes in other provisions
Beginning balance	217,781	271,828
Changes in other provisions
Increase in provision	181,756	4,447
Payment	(101,601)	(39,566)
Reversal of unused amount	(3,816)	(19,853)
Others	(1,170)	925
Ending balance	292,950	217,781
Current provisions	92,974	115,122
Non-current provisions	₩ 199,976	₩ 102,659

Provisions - Summary of Greenho

Provisions - Summary of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government (Details) - 3rd planned period [Member]	Dec. 31, 2023 kT
Disclosure of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government [Line Items]
Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government in Tons Co2 Equivalents	50,678
Period 2021 [Member]
Disclosure of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government [Line Items]
Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government in Tons Co2 Equivalents	0
Period 2022 [Member]
Disclosure of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government [Line Items]
Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government in Tons Co2 Equivalents	14,696
Period 2023 [Member]
Disclosure of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government [Line Items]
Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government in Tons Co2 Equivalents	14,776
Period 2024 [Member]
Disclosure of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government [Line Items]
Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government in Tons Co2 Equivalents	10,603
Period 2025 [Member]
Disclosure of Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government [Line Items]
Greenhouse Gas Emissions Rights Allowances Received Free of Charge from the Government in Tons Co2 Equivalents	10,603

Provisions - Summary of Changes

Provisions - Summary of Changes in Greenhouse Gas Emissions Rights (Details) - 3rd planned period [Member] ₩ in Millions		12 Months Ended
		Dec. 31, 2023 KRW (₩) kT	Dec. 31, 2022 KRW (₩) kT
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items]
Adjusted Quantity Beginning | kT	[1]	45,061	49,908
Purchase (Sell) | kT		2,095	2,601
Government submission | kT		(16,456)	(18,440)
Borrowing (carryforward) | kT		292	334
Others | kT			0
Reclassification | kT		(2)
Quantity Ending | kT		30,990	34,403
Balance Beginning | ₩	[1]	₩ 235,966	₩ 602,795
Purchase (Sell) | ₩		217,385	553,757
Government submission | ₩		(342,755)	(753,707)
Borrowing (carryforward) | ₩		27,037	60,473
Others | ₩			(227,352)
Reclassification | ₩		(5,664)
Balance Ending | ₩		131,969	₩ 235,966	[1]
Period 2021 [Member]
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items]
Adjusted Quantity Beginning | kT	[1]		16,433
Purchase (Sell) | kT			1,191
Government submission | kT			(17,602)
Borrowing (carryforward) | kT			(22)
Others | kT			0
Quantity Ending | kT			0
Balance Beginning | ₩		₩ 0	₩ 524,658	[1]
Purchase (Sell) | ₩			267,433
Government submission | ₩			(580,807)
Borrowing (carryforward) | ₩			(3,298)
Others | ₩			(207,986)
Balance Ending | ₩			₩ 0
Period 2022 [Member]
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items]
Adjusted Quantity Beginning | kT	[1]	14,704	14,942
Purchase (Sell) | kT		1,315	1,343
Government submission | kT		(15,972)	(838)
Borrowing (carryforward) | kT		(45)	286
Others | kT			0
Reclassification | kT		(2)
Quantity Ending | kT		0	15,733
Balance Beginning | ₩	[1]	₩ 192,005	₩ 62,735
Purchase (Sell) | ₩		135,040	272,824
Government submission | ₩		(302,918)	(173,145)
Borrowing (carryforward) | ₩		(24,127)	45,847
Others | ₩			(16,256)
Reclassification | ₩		0
Balance Ending | ₩		₩ 0	₩ 192,005	[1]
Period 2023 [Member]
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items]
Adjusted Quantity Beginning | kT	[1]	14,204	11,166
Purchase (Sell) | kT		707	32
Government submission | kT		(484)	0
Borrowing (carryforward) | kT		(231)	48
Others | kT			0
Reclassification | kT		0
Quantity Ending | kT		14,196	11,246
Balance Beginning | ₩	[1]	₩ 18,785	₩ 8,529
Purchase (Sell) | ₩		67,506	6,315
Government submission | ₩		(39,837)	245
Borrowing (carryforward) | ₩		(28,266)	12,225
Others | ₩			(8,529)
Reclassification | ₩		6,940
Balance Ending | ₩		₩ 25,128	₩ 18,785	[1]
Period 2024 [Member]
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items]
Adjusted Quantity Beginning | kT	[1]	8,088	3,671
Purchase (Sell) | kT		73	35
Government submission | kT		0	0
Borrowing (carryforward) | kT		568	22
Others | kT			0
Reclassification | kT		0
Quantity Ending | kT		8,729	3,728
Balance Beginning | ₩	[1]	₩ 12,884	₩ 0
Purchase (Sell) | ₩		14,839	7,185
Government submission | ₩		0	0
Borrowing (carryforward) | ₩		79,430	5,699
Others | ₩			0
Reclassification | ₩		(7)
Balance Ending | ₩		₩ 99,968	₩ 12,884	[1]
Period 2025 [Member]
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items]
Adjusted Quantity Beginning | kT	[1]	8,065	3,696
Purchase (Sell) | kT		0	0
Government submission | kT		0	0
Borrowing (carryforward) | kT		0	0
Others | kT			0
Reclassification | kT		0
Quantity Ending | kT		8,065	3,696
Balance Beginning | ₩	[1]	₩ 12,292	₩ 6,873
Purchase (Sell) | ₩		0	0
Government submission | ₩		0	0
Borrowing (carryforward) | ₩		0	0
Others | ₩			5,419
Reclassification | ₩		(5,419)
Balance Ending | ₩		₩ 6,873	₩ 12,292	[1]
[1]Changes such as additional allowances or cancellation of allowances are reflected.

Provisions - Summary of Chang_2

Provisions - Summary of Changes in greenhouse gas emissions rights (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2023 kT
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Abstract]
Estimated greenhouse gas emission	14,941

Government Grants - Summary of

Government Grants - Summary of Changes in Government Grants (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes in government grants
Beginning balance	₩ (521,101)	₩ (512,747)
Receipt	(57,207)	(50,755)
Acquisitions	5,544	23,155
Offset the items of depreciation expense and others	36,589	34,931
Disposals	2,842	1,673
Others	(5,644)	(17,358)
Ending balance	(538,977)	(521,101)
Cash
Changes in government grants
Beginning balance	0	0
Receipt	(57,207)	(50,755)
Acquisitions	0	0
Offset the items of depreciation expense and others	0	0
Disposals	0	0
Others	57,207	50,755
Ending balance	0	0
Land
Changes in government grants
Beginning balance	(27,405)	(23,474)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	0	0
Disposals	1	1
Others	0	(3,932)
Ending balance	(27,404)	(27,405)
Buildings
Changes in government grants
Beginning balance	(50,437)	(52,122)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	5,070	5,360
Disposals	0	0
Others	(860)	(3,675)
Ending balance	(46,227)	(50,437)
Structures
Changes in government grants
Beginning balance	(165,608)	(172,021)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	9,562	9,568
Disposals	1,611	1,250
Others	(3,446)	(4,405)
Ending balance	(157,881)	(165,608)
Machinery
Changes in government grants
Beginning balance	(127,126)	(140,082)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	17,413	17,283
Disposals	1,230	405
Others	(11,341)	(4,732)
Ending balance	(119,824)	(127,126)
Vehicles
Changes in government grants
Beginning balance	(2,045)	(1,675)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	960	663
Disposals	0	0
Others	(1,752)	(1,033)
Ending balance	(2,837)	(2,045)
Equipment
Changes in government grants
Beginning balance	(6,608)	(149)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	2,011	494
Disposals	0	0
Others	(1,335)	(6,953)
Ending balance	(5,932)	(6,608)
Tools
Changes in government grants
Beginning balance	(99)	(64)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	38	32
Disposals	0	0
Others	(1)	(67)
Ending balance	(62)	(99)
Construction in progress
Changes in government grants
Beginning balance	(135,926)	(111,822)
Receipt	0	0
Acquisitions	5,544	23,155
Offset the items of depreciation expense and others	0	0
Disposals	0	17
Others	(43,092)	(47,276)
Ending balance	(173,474)	(135,926)
Investment properties
Changes in government grants
Beginning balance	(21)	(30)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	1	1
Disposals	0	0
Others	(2)	8
Ending balance	(22)	(21)
Software
Changes in government grants
Beginning balance	(174)	(91)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	85	60
Disposals	0	0
Others	(324)	(143)
Ending balance	(413)	(174)
Development expenditures
Changes in government grants
Beginning balance	(3,477)	(3,820)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	1,356	1,466
Disposals	0	0
Others	0	(1,123)
Ending balance	(2,121)	(3,477)
Intangible assets under development
Changes in government grants
Beginning balance	(2,108)	(7,326)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	0	0
Disposals	0	0
Others	(350)	5,218
Ending balance	(2,458)	(2,108)
Others
Changes in government grants
Beginning balance	(67)	(71)
Receipt	0	0
Acquisitions	0	0
Offset the items of depreciation expense and others	93	4
Disposals	0	0
Others	(348)	0
Ending balance	₩ (322)	₩ (67)

Government Grants - Summary o_2

Government Grants - Summary of Changes in Government Grants for Specific Business Projects (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Beginning balance	₩ 521,101	₩ 512,747
Ending Balance	₩ 538,977	₩ 521,101
Government Grants For Specific Business Projects 1 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	Temporary electricity bill support for small business owners	Temporary electricity bill support for small business owners
Description	Temporary electricity bill support for small business owners	Temporary electricity bill support for small business owners
Period	2021.04.01 ~ 2022.06.30	2021.04.01 ~ 2022.06.30
Budget	₩ 211,235	₩ 211,235
Beginning balance	1,120	17,735
Received	0	71,685
Interest	0	0
Used	(51)	(88,300)
Return	0	0
Others	0	0
Ending Balance	₩ 1,069	₩ 1,120
Government Grants For Specific Business Projects 2 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	Construction of the Integrated Control System for Renewable Energy in Transmission Area	2021 project to support the supply of open electric vehicle charging station
Description	Construction of the Integrated Control System for Renewable Energy in Transmission Area	2021 project to support the supply of open electric vehicle charging station
Period	2022.01.01 ~ 2023.09.30	2021.01.01 ~ 2022.05.31
Budget	₩ 940	₩ 40,100
Beginning balance	0	0
Received	798	11,796
Interest	0	0
Used	(798)	(11,796)
Return	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 3 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Electricity supply business in rural areas (Newly Electricity Supply Contribution Fees)	2022 Electricity supply business in rural areas (Newly Electricity Supply Construction Fees)
Description	Electricity supply business in rural areas (Newly Electricity Supply Contribution Fees)	2022 Electricity supply business in rural areas (Newly Electricity Supply Construction Fees)
Period	2023.01.01 ~ 2024.01.31	2022.01.01 ~ 2023.01.31
Budget	₩ 2	₩ 149
Beginning balance	0	0
Received	35	151
Interest	0	0
Used	(35)	(151)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 4 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Electricity supply business in rural areas (Reservation of Financial Loans)	2022 Electricity supply business in rural areas (Reservation of Financial Loans)
Description	Electricity supply business in rural areas (Reservation of Financial Loans)	2022 Electricity supply business in rural areas (Reservation of Financial Loans)
Period	2023.01.01 ~ 2024.01.31	2022.01.01 ~ 2023.01.31
Budget	₩ 166	₩ 166
Beginning balance	0	0
Received	166	166
Interest	0	0
Used	(166)	(166)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 5 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Electricity supply business in rural areas (Support for operational deficits of electricity providers)	2022 Electricity supply business in rural areas (Support for operational deficits of electricity providers)
Description	Electricity supply business in rural areas (Support for operational deficits of electricity providers)	2022 Electricity supply business in rural areas (Support for operational deficits of electricity providers)
Period	2023.01.01 ~ 2024.01.31	2023.01.31 ~ 2022.01.31
Budget	₩ 158,275	₩ 166,732
Beginning balance	0	0
Received	149,259	158,669
Interest	0	0
Used	(149,259)	(158,669)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 6 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Electricity supply business in rural areas (Technical support for local governments and residents)	2022 Electricity supply business in rural areas (Technical support for local governments and residents)
Description	Electricity supply business in rural areas (Technical support for local governments and residents)	2022 Electricity supply business in rural areas (Technical support for local governments and residents)
Period	2023.01.01 ~ 2024.01.31	2022.01.01 ~ 2023.01.31
Budget	₩ 1,176	₩ 1,028
Beginning balance	0	0
Received	1,862	268
Interest	0	0
Used	(1,862)	(268)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 7 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Electricity supply business in rural areas (Support for Losses in Local Government Operations)	2022 Electricity supply business in rural areas (Support for Losses in Local Government Operations)
Description	Electricity supply business in rural areas (Support for Losses in Local Government Operations)	2022 Electricity supply business in rural areas (Support for Losses in Local Government Operations)
Period	2023.01.01 ~ 2024.01.31	2022.01.01 ~ 2023.01.31
Budget	₩ 12,036	₩ 10,078
Beginning balance	0	0
Received	8,619	11,071
Interest	0	0
Used	(8,619)	(11,071)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 8 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Establishment of eco-friendly microgrid in island areas	2022 Establishment of eco-friendly microgrid in island areas
Description	Establishment of eco-friendly microgrid in island areas	2022 Establishment of eco-friendly microgrid in island areas
Period	2023.01.01 ~ 2024.01.31	2022.01.01 ~ 2023.01.31
Budget	₩ 3,871	₩ 7,742
Beginning balance	0	0
Received	26,091	14,113
Interest	0	0
Used	(26,091)	(14,113)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 9 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Operating expenses for regional projects around the power plant	2022 Operating expenses for regional projects around the power plant
Description	Operating expenses for regional projects around the power plant	2022 Operating expenses for regional projects around the power plant
Period	2023.01.01 ~ 2023.12.31	2022.01.01 ~ 2022.12.31
Budget	₩ 361	₩ 387
Beginning balance	0	0
Received	51	63
Interest	0	0
Used	(51)	(63)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 10 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	2023 Renewable Energy Generation Difference Support	2022 Renewable Energy Generation Difference Support
Description	Renewable Energy Generation Difference Support	2022 Renewable Energy Generation Difference Support
Period	2023.01.01 ~ 2023.12.31	2022.01.01 ~ 2022.12.31
Budget	₩ 78,311	₩ 98,656
Beginning balance	0	0
Received	69,599	81,739
Interest	0	0
Used	(69,599)	(81,739)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 11 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	Safety inspection of general electrical equipment	Safety inspection of general electrical equipment
Description	Safety inspection of general electrical equipment	Safety inspection of general electrical equipment
Period	2023.01.01 ~ 2023.12.31	2022.01.01 ~ 2022.12.31
Budget	₩ 2,560	₩ 2,122
Beginning balance	0	0
Received	2,560	2,117
Interest	0	0
Used	(2,560)	(2,117)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 12 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	Establishment of Integrated Control System for Renewable Energy in the power distribution sector	Establishment of Integrated Control System for Renewable Energy in the transmission and substation sector
Description	Establishment of Integrated Control System for Renewable Energy in the power distribution sector	Establishment of Integrated Control System for Renewable Energy in the transmission and substation sector
Period	2023.01.01 ~ 2023.04.18	2021.01.01 ~ 2022.08.31
Budget	₩ 495	₩ 940
Beginning balance	0	0
Received	635	463
Interest	0	0
Used	(635)	(463)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0
Government Grants For Specific Business Projects 13 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Trade, Industry and Energy	Ministry of Trade, Industry and Energy
Business Name	Support for the installation of workplace daycare centers	Establishment of Integrated Control System for Renewable Energy in the power distribution sector
Description	Support for the installation of workplace daycare centers	Establishment of Integrated Control System for Renewable Energy in the power distribution sector
Period	2023.01.01 ~ 2023.12.31	2021.01.01 ~ 2022.08.31
Budget	₩ 2,510	₩ 5,060
Beginning balance	0	0
Received	680	5,027
Interest	2	0
Used	(680)	(5,027)
Return	(1,832)	0
Others	1,832	0
Ending Balance	₩ 2	₩ 0
Government Grants For Specific Business Projects 14 [Member]
Disclosure of Detailed Information About Changes in Government Grants for Specific Business Projects [Line Items]
Department	Ministry of Employment and Labor	Ministry of Employment and Labor
Business Name	Support for replacement of teaching materials at workplace daycare centers	Support for replacement of teaching materials at workplace daycare centers
Description	Support for replacement of teaching materials at workplace daycare centers	Support for replacement of teaching materials at workplace daycare centers
Period	2023.01.01 ~ 2023.12.31	2022.01.01 ~ 2022.01.07
Budget	₩ 1,490	₩ 48
Beginning balance	0	0
Received	270	29
Interest	0	0
Used	(270)	(29)
Return	0	0
Others	0	0
Ending Balance	₩ 0	₩ 0

Deferred Revenues (Details)

Deferred Revenues (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of deferred revenue [abstract]
Deferred Revenue, Beginning Balance	₩ 10,974,845	₩ 10,356,555
Increase	1,317,061	1,330,129
Recognized as revenue	(743,051)	(711,839)
Deferred Revenue, Ending Balance	₩ 11,548,855	₩ 10,974,845

Non-financial Liabilities (Deta

Non-financial Liabilities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Miscellaneous liabilities [abstract]
Advance received, Current	₩ 5,204,113	₩ 4,544,206
Unearned revenue, Current	36,716	86,584
Deferred revenue, Current	734,825	702,430
Withholdings, Current	259,755	207,217
Others. Current	1,646,254	1,433,940
Non-financial liabilities, Current	7,881,663	6,974,377
Advance received, Non-current	288,686	284,618
Unearned revenue, Non-current	12,108	7,200
Deferred revenue, Non-current	10,814,030	10,272,415
Withholdings, Non-current	2,369	2,408
Others, Non-current	78,807	96,020
Non-financial liabilities, Non-current	₩ 11,196,000	₩ 10,662,661

Contributed Capital - Summary o

Contributed Capital - Summary of Details Shares Issued (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Disclosure of classes of share capital [line items]
Common shares		₩ 3,209,820	₩ 3,209,820
Owned by government
Disclosure of classes of share capital [line items]
Common shares	[1]	1,640,385	1,640,385
Owned by others
Disclosure of classes of share capital [line items]
Common shares		₩ 1,569,435	₩ 1,569,435
[1]Korea Development Bank’s interest of ￦1,056,176 million is included.

Contributed Capital - Summary_2

Contributed Capital - Summary of Details of Shares Issued (Parentheticals) (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Common stock issued capital		₩ 3,209,820	₩ 3,209,820
Share Capital Owned By Government
Common stock issued capital	[1]	1,640,385	1,640,385
Korean Development Bank [Member] | Share Capital Owned By Government
Common stock issued capital		₩ 1,056,176	₩ 1,056,176
[1]Korea Development Bank’s interest of ￦1,056,176 million is included.

Contributed Capital - Summary_3

Contributed Capital - Summary of Details in Number of Outstanding Capital Stock (Details) - Ordinary shares [member] - ₩ / shares	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of classes of share capital [line items]
Shares authorized	1,200,000,000	1,200,000,000
Shares issued	641,964,077	641,964,077	641,964,077
Par value per share	₩ 5,000	₩ 5,000
Number of shares outstanding	641,964,077	641,964,077	641,964,077

Contributed Capital - Summary_4

Contributed Capital - Summary of Share Premium (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Share Premium [Abstract]
Share premium	₩ 843,758	₩ 843,758

Retained Earnings and Dividen_3

Retained Earnings and Dividends Paid - Summary of Retained Earnings (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Retained earnings [abstract]
Legal reserves	[1]	₩ 1,604,910	₩ 1,604,910
Voluntary reserves		2,812,313	27,782,969
Retained earnings (Undisposed deficit) before appropriations		11,921,039	(7,956,579)
Retained earnings		16,338,262	21,431,300
Voluntary reserves
Reserve for investment on social overhead capital		2,272,313	5,277,449
Reserve for research and human development	[2]	330,000	330,000
Reserve for business expansion		0	21,965,520
Reserve for equalizing dividends		₩ 210,000	₩ 210,000
[1]The KEPCO Act requires KEPCO to appropriate a legal reserve equal to at least 20 percent of net income for each accounting period until the reserve equals 50 percent of KEPCO’s common stock. The legal reserve is not available for cash dividends; however, this reserve may be credited to paid-in capital or offset against accumulated deficit by the resolution of the shareholders.[2]The reserve for research and human development is appropriated by KEPCO to use as qualified tax credits to reduce corporate tax liabilities. The reserve is available for cash dividends for a certain period as defined by the Restriction of Special Taxation Act of Korea.

Retained Earnings and Dividen_4

Retained Earnings and Dividends Paid - Summary of Changes in Retained Earnings (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Beginning balance	₩ 21,431,300
Loss for the year attributed to owners of the controlling company	(4,822,549)	₩ (24,466,853)	₩ (5,304,522)
Changes in equity method retained earnings
Changes	(595,056)	(1,338,293)
Remeasurements of defined benefit liability, net of tax	(271,724)	663,095	210,409
Additional paid-in capital and others	6,023	126,792	75,211
Ending balance	16,338,262	21,431,300
Retained earnings [member]
Beginning balance	21,431,300	45,258,244
Loss for the year attributed to owners of the controlling company	(4,822,549)	(24,466,853)
Changes in equity method retained earnings
Beginning balance	16,275	3,970
Changes	(27,349)	12,305
Ending balance	(11,074)	16,275	3,970
Remeasurements of defined benefit liability, net of tax	(242,987)	626,769	201,067
Others	(153)	0
Additional paid-in capital and others	0	835	0
Ending balance	₩ 16,338,262	₩ 21,431,300	₩ 45,258,244

Retained Earnings and Dividen_5

Retained Earnings and Dividends Paid - Summary of Dividends Paid (Details) - Ordinary shares [member] - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Dividends [Line Items]
Number of shares issued	641,964,077	641,964,077	641,964,077
Number of treasury stocks	0	0	0
Number of shares eligible for dividends	641,964,077	641,964,077	641,964,077
Dividends paid per share (In won)	₩ 0	₩ 0	₩ 1,216
Dividends paid, ordinary shares	₩ 0	₩ 0	₩ 780,628

Retained Earnings and Dividen_6

Retained Earnings and Dividends Paid - Summary of Changes in Reserve of Remeasurement (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans [abstract]
Beginning balance	₩ 614,805	₩ 98,844
Changes	(376,121)	964,791
Income tax effect	133,134	(338,022)
Transfer to reserve for business expansion	(342,589)	(110,808)
Ending balance	₩ 29,229	₩ 614,805

Statements of Appropriation o_3

Statements of Appropriation of Retained Earnings (Disposition of Deficit) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Appropriation of Retained Earnings [Line Items]
Undisposed deficit carried over from prior years	₩ (7,956,579)
Net loss	(4,716,144)	₩ (24,429,108)	₩ (5,215,581)
Remeasurement of the defined benefit plan	(271,724)	663,095	₩ 210,409
Separate [member]
Statement of Appropriation of Retained Earnings [Line Items]
Undisposed deficit carried over from prior years	0	0
Net loss	(3,249,233)	(25,297,713)
Remeasurement of the defined benefit plan	(149,474)	327,056
Retained earnings before appropriations	(3,398,707)	(24,970,657)
Transfer from voluntary reserves	2,812,314	24,970,657
Subtotal (I+II)	(586,393)	0
Disposition of deficit	586,393	0
Undisposed deficit to be carried over forward to subsequent year	₩ 0	₩ 0

Hybrid bond (Details)

Hybrid bond (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Hybrid Bond [Line Items]
Amount		₩ 229,373	₩ 229,373
Korea South-East Power Co., Ltd. | 2nd bond-type hybrid bond
Hybrid Bond [Line Items]
Issue date	[1]	Dec. 07, 2012
Maturity date	[1]	Dec. 06, 2042
Yield (%)	[1]	4.44%
Amount	[1]	₩ 230,000	230,000
Expense of issuance
Hybrid Bond [Line Items]
Amount		₩ (627)	₩ (627)
[1]Bondholders may not require prepayment in any case, and the Company has a call option to repay all of these bonds on or after 12 years from the date of issuance of the bonds, or on each interest payment date henceforth. In addition, there is a step-up clause from the date of the initial call option exercise. Although these instruments have contractual maturity dates, the contractual agreements allow these subsidiaries to indefinitely extend the maturity dates and defer the payment of interest without modification to the other terms of the instruments. When the Company decides not to pay dividends on common shares, they are not required to pay interest on the hybrid bonds.

Hybrid bond (Parentheticals) (D

Hybrid bond (Parentheticals) (Details)	12 Months Ended
	Dec. 31, 2023
Hybrid Bonds [Abstract]
Hybrid Bonds, Repayment Term	12 years

Other Components of Equity - Su

Other Components of Equity - Summary of Other Components of Equity (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Beginning balance	₩ 42,000,256	₩ 65,326,706	₩ 70,668,059
Additional paid-in capital and others	6,023	126,792	75,211
Shares of other comprehensive income of associates and joint ventures, net of tax	(27,349)	12,305	3,609
Shares of other comprehensive income of associates and joint ventures, net of tax	122,994	509,487	301,161
Foreign currency translation of foreign operations, net of tax	(17,274)	28,387	41,189
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	(3,654)	(24,415)	(15,778)
Others	153
Ending balance	37,264,750	42,000,256	65,326,706
Other Components Of Equity
Beginning balance	15,060,518
Ending balance	15,453,203	15,060,518
Other capital surplus
Beginning balance	1,268,569	1,231,109
Changes in consolidation scope	(48)	(597)
Additional paid-in capital and others	0	39,641
Transactions between consolidated entities	332,280	(1,584)
Ending balance	1,600,801	1,268,569	1,231,109
Other capital surplus | Other Components Of Equity
Beginning balance	1,268,569
Ending balance	1,600,801	1,268,569
Gains on disposal of Treasury stocks
Beginning balance	387,524	387,524
Changes in consolidation scope	0	0
Additional paid-in capital and others	0	0
Transactions between consolidated entities	0	0
Ending balance	387,524	387,524	387,524
Other Capital Surplus Other Than Gainson Disposal Of Treasury Stocks
Beginning balance	881,045	843,585
Changes in consolidation scope	(48)	(597)
Additional paid-in capital and others	0	39,641
Transactions between consolidated entities	332,280	(1,584)
Ending balance	1,213,277	881,045	843,585
Accumulated other comprehensive income (loss)
Beginning balance	496,976	(57,632)
Changes in the unrealized fair value of financial assets at FVOCI, net of tax	(31,665)	58,008
Shares of other comprehensive income of associates and joint ventures, net of tax	122,994	509,487
Foreign currency translation of foreign operations, net of tax	(25,950)	19,550
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	(5,078)	(32,437)
Ending balance	557,430	496,976	(57,632)
Accumulated other comprehensive income (loss) | Other Components Of Equity
Beginning balance	496,976
Ending balance	557,430	496,976
Financial assets at fair value through other comprehensive income
Beginning balance	11,510	(46,498)
Changes in the unrealized fair value of financial assets at FVOCI, net of tax	(31,665)	58,008
Shares of other comprehensive income of associates and joint ventures, net of tax	0	0
Foreign currency translation of foreign operations, net of tax	0	0
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	0	0
Others	153
Ending balance	(20,002)	11,510	(46,498)
Shares in other comprehensive Income (loss) of investments in associates and joint ventures
Beginning balance	820,739	311,252
Changes in the unrealized fair value of financial assets at FVOCI, net of tax	0	0
Shares of other comprehensive income of associates and joint ventures, net of tax	122,994	509,487
Foreign currency translation of foreign operations, net of tax	0	0
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	0	0
Others	0
Ending balance	943,733	820,739	311,252
Reserve for gain (loss) on valuation of derivatives
Beginning balance	(29,653)	2,784
Changes in the unrealized fair value of financial assets at FVOCI, net of tax	0	0
Shares of other comprehensive income of associates and joint ventures, net of tax	0	0
Foreign currency translation of foreign operations, net of tax	0	0
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	(5,078)	(32,437)
Others	0
Ending balance	(34,731)	(29,653)	2,784
Reserve for overseas operations translation credit
Beginning balance	(305,620)	(325,170)
Changes in the unrealized fair value of financial assets at FVOCI, net of tax	0	0
Shares of other comprehensive income of associates and joint ventures, net of tax	0	0
Foreign currency translation of foreign operations, net of tax	(25,950)	19,550
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	0	0
Others	0
Ending balance	(331,570)	(305,620)	₩ (325,170)
Other equity
Beginning balance	13,294,973
Ending balance	13,294,972	13,294,973
Other equity | Other Components Of Equity
Beginning balance	13,294,973
Ending balance	13,294,972	13,294,973
Statutory revaluation reserve
Beginning balance	13,295,098
Ending balance	13,295,098	13,295,098
Changes in other equity
Beginning balance	(125)
Ending balance	₩ (126)	₩ (125)

Sales - Summary of Sales (Detai

Sales - Summary of Sales (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		₩ 85,940,137	₩ 69,184,469	₩ 58,800,977
Sales related to rendering of services		750,878	714,602	456,400
Sales related to construction services		785,395	646,953	754,998
Total revenue from external customers (Notes 4, 35, 45, 47)		87,476,410	70,546,024	60,012,375
Domestic
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		85,588,151	68,578,390	58,359,774
Sales related to rendering of services		467,661	370,799	252,216
Sales related to construction services		186,996	193,541	159,262
Total revenue from external customers (Notes 4, 35, 45, 47)		86,242,808	69,142,730	58,771,252
Domestic | Electricity
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		82,954,778	66,198,964	57,308,555
Domestic | Heat Supply
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		440,435	489,629	232,738
Domestic | Others
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		2,192,938	1,889,797	818,481
Domestic | Performance obligations satisfied at point in time
Disclosure of performance obligations [line items]
Total revenue from external customers (Notes 4, 35, 45, 47)		85,588,151	68,578,390	58,359,774
Domestic | Performance obligations satisfied over time
Disclosure of performance obligations [line items]
Total revenue from external customers (Notes 4, 35, 45, 47)		654,657	564,340	411,478
Overseas
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		351,986	606,079	441,203
Sales related to rendering of services		283,217	343,803	204,184
Sales related to construction services		598,399	453,412	595,736
Total revenue from external customers (Notes 4, 35, 45, 47)	[1]	1,233,602	1,403,294	1,241,123
Overseas | Electricity
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		0	0	0
Overseas | Heat Supply
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		0	0	0
Overseas | Others
Disclosure of performance obligations [line items]
Sales of goods (Note 2)		351,986	606,079	441,203
Overseas | Performance obligations satisfied at point in time
Disclosure of performance obligations [line items]
Total revenue from external customers (Notes 4, 35, 45, 47)		351,986	606,079	441,203
Overseas | Performance obligations satisfied over time
Disclosure of performance obligations [line items]
Total revenue from external customers (Notes 4, 35, 45, 47)		₩ 881,616	₩ 797,215	₩ 799,920
[1]Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current assets attributable to particular countries are not material, they are not disclosed individually.

Selling and Administrative Ex_3

Selling and Administrative Expenses - Summary of Selling and Administrative Expenses (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of attribution of expenses by nature to their function [line items]
Salaries	₩ 5,515,166	₩ 5,471,459	₩ 5,397,682
Retirement benefit expense	460,302	615,370	601,390
Welfare and benefit expense	695,203	695,839	725,998
Insurance expense	147,690	127,507	122,453
Depreciation	12,864,913	12,301,131	11,771,324
Amortization of intangible assets	163,174	156,160	166,161
Bad debt expense	62,808	23,634	17,968
Commission	801,768	771,947	717,559
Advertising expense	39,161	44,291	38,782
Training expense	23,964	22,140	18,206
Vehicle maintenance expense	18,172	21,024	17,001
Publishing expense	6,160	6,746	6,878
Business promotion expense	5,082	6,538	7,299
Rent expense	206,556	234,119	237,884
Telecommunication expense	17,519	17,622	19,528
Transportation expense	103,601	114,857	54,235
Taxes and dues	687,066	676,497	622,826
Expendable supplies expense	54,504	56,776	50,466
Water, light and heating expense	57,407	77,952	55,376
Repairs and maintenance expense	2,774,262	2,739,424	2,617,995
Ordinary development expense	717,561	727,810	689,397
Travel expense	93,497	95,061	78,202
Clothing expense	19,940	21,822	18,534
Survey and analysis expense	5,224	5,448	4,881
Membership fee	16,667	18,381	9,823
Disclosure - Other selling and administrative expenses
General and administrative expenses	3,061,582	3,009,422	2,875,796
Selling and administrative expense
Disclosure of attribution of expenses by nature to their function [line items]
Salaries	1,098,460	1,142,360	1,121,188
Retirement benefit expense	89,533	109,758	113,127
Welfare and benefit expense	152,836	155,781	155,558
Insurance expense	27,726	20,835	17,909
Depreciation	241,533	244,676	219,427
Amortization of intangible assets	88,648	85,661	91,428
Bad debt expense	62,808	23,634	17,968
Commission	460,644	420,390	410,287
Advertising expense	30,305	33,739	29,230
Training expense	7,900	7,327	4,923
Vehicle maintenance expense	9,044	10,749	8,849
Publishing expense	3,281	3,732	3,568
Business promotion expense	2,559	3,198	3,522
Rent expense	44,807	47,680	43,650
Telecommunication expense	7,813	7,945	8,569
Transportation expense	1,099	1,012	870
Taxes and dues	112,449	122,177	93,446
Expendable supplies expense	7,252	9,617	9,052
Water, light and heating expense	16,207	17,950	12,351
Repairs and maintenance expense	154,062	152,449	123,134
Ordinary development expense	217,319	213,932	213,936
Travel expense	16,265	16,062	11,099
Clothing expense	10,450	13,044	10,540
Survey and analysis expense	1,068	1,126	889
Membership fee	1,503	1,469	1,331
Disclosure - Other selling and administrative expenses
Accommodation development expenses	49,988	56,038	57,815
Miscellaneous wages	97,474	31,910	47,221
Litigation and filing expenses	19,204	14,876	16,383
Compensation for damages	4,300	3,116	3,303
Outsourcing expenses	3,511	3,635	3,799
Reward expenses	2,770	2,740	3,006
Overseas market development expenses	1,503	1,376	1,192
Others	17,261	29,428	17,226
Others	196,011	143,119	149,945
General and administrative expenses	₩ 3,061,582	₩ 3,009,422	₩ 2,875,796

Other Income and Expenses (Deta

Other Income and Expenses (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other non-operating income [Abstract]
Reversal of other provisions	₩ 79,001	₩ 15,265	₩ 15,548
Reversal of other allowance for doubtful accounts	1,941	37	98
Gains on government grants	239	301	458
Gains on assets contributed	24,183	1,953	9,347
Gains on liabilities exempted	854	1,181	1,830
Compensation and reparations revenue	93,785	89,638	104,826
Revenue from foundation fund	60	3	1
Income related to transfer of assets from customers	743,051	711,839	661,212
Rental income	210,972	208,064	204,123
Others of Other Income	121,816	67,208	36,690
Refund of claim for rectification	1,054	701	7,274
Adjustment of research project	0	0	7,638
Maintenance expenses on lease building	124	125	160
Training expenses	1,946	1,684	1,739
Deposit redemption	100	12	378
Reversal of expenses on litigation	44,197	1,920	991
Revenue on royalty fee	422	455	173
Reimbursement of insurance fee	0	0	1
Gains on guarantee contracts	16	22	27
Miscellaneous other non-operating income	73,957	62,289	18,309
Other nonoperating income	1,275,902	1,095,489	1,034,133
Other non-operating expense
Compensation and indemnification expense	34	36	663
Accretion expenses of other provisions	4,962	1,138	2,711
Depreciation expenses on investment properties	493	486	1,386
Depreciation expenses on idle assets	3,683	3,635	3,621
Other bad debt expense	40,683	6,400	49,372
Donations	169,748	131,037	152,456
Others of Other Expense	39,302	69,418	47,723
Operating expenses related to the idle assets	1,494	1,683	44
Research grants	174	562	109
Expenses related to farming and fishing village supports	13,249	11,272	17,065
Expenses related to Operating of a fitness center	8,921	8,370	6,948
Expenses on adjustment of research and development grants	388	260	2,241
Taxes and dues	1,935	31,985	119
Expenses on R&D supports	9	48	861
Miscellaneous other non-operating expense	13,132	15,238	20,336
Other Nonoperating Expense	₩ 258,905	₩ 212,150	₩ 257,932

Other Gains (Losses) (Details)

Other Gains (Losses) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other gains
Gains on disposal of property, plant and equipment	₩ 32,196	₩ 148,667	₩ 56,284
Gains on disposal of inventories	20,447	11,091	4,446
Gains on disposal of intangible assets	136	41	1
Reversal of impairment loss on intangible assets	16,035	0	14
Reversal of impairment loss on property, plant and equipment	0	134,735	0
Gains on proxy collection of TV license fee	41,372	42,286	42,271
Gains on foreign currency translation	27,123	36,097	20,598
Gains on foreign currency transaction	139,077	235,221	48,671
Gains on insurance proceeds	6,785	43,497	144
Miscellaneous Other Gains	346,795	294,091	250,174
Gains on compensation of impaired electric poles	1,138	768	812
Gains on harbor facilities dues	3,666	4,198	3,281
Gains on technical fees	3,071	2,972	3,968
Reversal of occupation development training fees	1,452	525	229
Gains on disposal of waste	3,815	7,749	4,272
Gains on insurance	0	0	690
Gains on tax rebate	374	548	685
Gains on other commission	2,044	2,097	1,822
Gains on disposal of assets held-for-sale	0	236	160
Others of Miscellaneous Other Gains	269,416	221,621	178,799
Gains on disposal of greenhouse gas emissions rights	0	0	8,739
Other losses
Losses on disposal of property, plant and equipment	(98,120)	(100,066)	(92,622)
Losses on disposal of intangible assets	(71)	(116)	(145)
Losses on valuation of other non-current assets	(3,901)	(14,738)	(4,732)
Impairment loss on property, plant and equipment	(17,031)	(37,311)	(4,056)
Impairment loss on intangible assets	(2,865)	(164)	0
Impairment loss on other non-current assets	0	0	(16,035)
Losses on foreign currency translation	(165,187)	(299,117)	(67,990)
Miscellaneous Other Losses	(258,286)	(197,715)	(181,787)
Losses on valuation of inventories	9,936	14,528	7,761
Losses on disposal of inventories	5,471	8,324	8,874
Losses due to disaster	7,138	5,068	6,238
Losses on rounding adjustment of electric charge surtax	1,332	1,317	1,283
Others of miscellaneous other losses	234,409	168,478	146,349
Loss on disposal of greenhouse gas emissions rights	0	0	11,282
Total miscellaneous other losses	258,286	197,715	181,787
Net other gains	₩ 22,686	₩ 243,122	₩ 8,519

Finance Income - Summary of Fin

Finance Income - Summary of Finance Income and Interest Income (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest Income
Cash and cash equivalents	₩ 100,205	₩ 51,872	₩ 12,692
Financial assets at fair value through profit or loss	65,470	58,540	18,415
Financial assets at amortized cost	2,929	1,308	797
Loans	44,029	33,545	25,196
Short-term financial instruments	34,260	15,827	7,531
Long-term financial instruments	14,183	14,371	12,470
Other financial assets	241	637	230
Trade and other receivables	168,303	164,653	144,543
Total Interest Income	429,620	340,753	221,874
Dividend income	25,941	28,875	10,522
Gains on disposal of financial assets	13,162	11,199	7,718
Gains on valuation of financial assets at fair value through profit or loss	152,322	7,099	14,338
Gains on valuation of derivatives	382,611	595,256	860,011
Gains on transaction of derivatives	268,618	429,847	124,900
Gains on foreign currency translation	104,901	389,361	146,349
Gains on foreign currency transaction	42,886	29,997	15,618
Other financial income	4,970	925	1,284
Total Finance Income	₩ 1,425,031	₩ 1,833,312	₩ 1,402,614

Finance Expenses - Summary of F

Finance Expenses - Summary of Finance Expenses and Interest Expense (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest costs [abstract]
Trade and other payables	₩ 200,440	₩ 204,078	₩ 213,765
Short-term borrowings	376,066	145,201	42,371
Long-term borrowings	407,915	204,037	115,141
Debt securities	3,634,680	2,388,517	1,728,588
Other financial liabilities	614,332	472,248	384,423
Interest expense (before capitalizing borrowing costs)	5,233,433	3,414,081	2,484,288
Less: Capitalized borrowing costs	(781,774)	(595,535)	(569,831)
Interest expense	4,451,659	2,818,546	1,914,457
Losses on sale of financial assets	1	1,841	1,045
Losses on valuation of financial assets at fair value through profit or loss	24,015	44,329	5,480
Losses on valuation of derivatives	148,412	371,038	37,017
Losses on transaction of derivatives	178,959	205,162	40,818
Losses on foreign currency translation	491,782	934,005	1,159,334
Losses on foreign currency transaction	49,677	346,711	83,558
Losses on repayment of financial liabilities	0	15	10
Others	2,513	25,144	4,058
Total Finance Expense	₩ 5,347,018	₩ 4,746,791	₩ 3,245,777

Finance Expenses - Additional I

Finance Expenses - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Minimum
Borrowing costs [abstract]
Capitalization rates	2.34%	2.25%	2.02%
Maximum
Borrowing costs [abstract]
Capitalization rates	4.28%	3.86%	4.33%

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Expense (Benefit) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income tax expense (benefit) [Abstract]
Payment of income tax	₩ 621,957	₩ 563,681	₩ 357,767
Adjustment in respect of prior years due to change in estimate	(32,100)	48,374	153,113
Current income tax directly recognized in equity	93,705	(350,348)	(198,714)
Current income tax expense	683,562	261,707	312,166
Generation and realization of temporary differences	(1,845,236)	(564,801)	(489,411)
Reclassified from equity to profit (loss)	0	(4,964)	0
Changes of unrecognized tax losses, tax credit and temporary differences for prior periods	(15,244)	(38,708)	(43,653)
Changes in deferred tax on tax losses carryforwards	(1,650,017)	(9,175,755)	(1,641,823)
Tax credit carryforwards	(16,734)	34,019	(12,199)
Amount due to change in tax rate or regulations	5,836	73,991	18,931
Deferred tax benefit	(3,521,395)	(9,676,218)	(2,168,155)
Income tax benefit	(2,837,833)	(9,414,511)	(1,855,989)
Dividends of hybrid bond	0	4,149	4,736
Disposal of subsidiaries	0	406	0
Income tax directly adjusted to equity	0	4,555	4,736
Loss on valuation of financial assets at fair value through other comprehensive income	(10,624)	(31,416)	(9,753)
Net change in the unrealized fair value of derivatives using cash flow hedge accounting, net of tax	4,863	40,390	24,220
Remeasurements of defined benefit liability	133,134	(322,489)	(126,890)
Investments in associates	(40,213)	(66,677)	(53,672)
Others	6,545	25,289	(37,355)
Income tax recognized as other comprehensive income (loss)	₩ 93,705	₩ (354,903)	₩ (203,450)

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation Between Actual Income Tax Benefit and Amount Computed by Applying the Statutory Tax Rate (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Loss before income tax		₩ (7,553,977)	₩ (33,843,619)	₩ (7,071,570)
Income tax benefit computed at applicable tax rate	[1]	(1,936,840)	(9,306,995)	(1,944,682)
Effect of applying gradual tax rate		(10,362)	(10,362)	(10,362)
Effect of non-taxable income		(26,993)	(9,471)	(4,983)
Effect of non-deductible expenses		39,411	39,663	78,814
Recognition Of Unrecognized Deferred Tax Asset Net		0	19,275	1,351
Effects of tax credits and deduction		(53,724)	(98,684)	(43,931)
Reversal of unrecognized deferred tax asset, net		(15,244)	(38,708)	(43,641)
Effect of change in deferred tax due to change in tax rate		211,736	393,416	18,931
Deduction of deferred tax assets		29,095	(85,514)	73,887
Deferred tax related to investments in subsidiaries, associates and joint ventures		(1,063,007)	(375,064)	(135,878)
Others, net		20,195	9,559	1,392
Adjustments		(868,893)	(155,890)	(64,420)
Adjustment in respect of prior years due to change in estimate		(32,100)	48,374	153,113
Income tax benefit		₩ (2,837,833)	₩ (9,414,511)	₩ (1,855,989)
Effective tax rate	[2]
[1]Applicable tax rates are 27.5%, 26.5% and 25.64% as of December 31, 2021, 2022 and 2023, respectively.[2]The effective tax rate for the year ended December 31, 2021, 2022 and 2023 is not calculated due to income tax benefit.

Income Taxes - Summary of Rec_2

Income Taxes - Summary of Reconciliation Between Actual Income Tax Expense and Amount Computed by Applying the Statutory Tax Rate (Parenthetical) (Details)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Applicable tax rate		25.64%	26.50%	27.50%
Effective tax rate	[1]
[1]The effective tax rate for the year ended December 31, 2021, 2022 and 2023 is not calculated due to income tax benefit.

Income Taxes - Summary of Chang

Income Taxes - Summary of Changes in Deferred Income Tax Assets (Liabilities) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	₩ 4,477,272	₩ (5,198,946)
Amounts recognized in profit or loss	3,427,690	10,026,566
Amount recognized in other comprehensive income (loss)	93,705	(354,903)	₩ (203,450)
Amounts recognized directly in equity	0	4,555
Ending balance	7,998,667	4,477,272	(5,198,946)
Deferred income tax on temporary differences
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(7,416,288)	(7,962,698)
Amounts recognized in profit or loss	1,733,121	896,758
Amount recognized in other comprehensive income (loss)	93,705	(354,903)
Amounts recognized directly in equity	0	4,555
Ending balance	(5,589,462)	(7,416,288)	(7,962,698)
Employee benefits
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	199,553	558,383
Amounts recognized in profit or loss	6,597	(36,341)
Amount recognized in other comprehensive income (loss)	133,134	(322,489)
Amounts recognized directly in equity	0	0
Ending balance	339,284	199,553	558,383
Cash flow hedges
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(55,340)	(49,947)
Amounts recognized in profit or loss	29,622	(46,188)
Amount recognized in other comprehensive income (loss)	4,863	40,390
Amounts recognized directly in equity	0	405
Ending balance	(20,855)	(55,340)	(49,947)
Investments in subsidiaries, associates and joint ventures
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(8,377,687)	(8,721,320)
Amounts recognized in profit or loss	1,300,263	410,310
Amount recognized in other comprehensive income (loss)	(40,213)	(66,677)
Amounts recognized directly in equity	0	0
Ending balance	(7,117,637)	(8,377,687)	(8,721,320)
Property, plant and equipment
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(7,541,638)	(7,430,461)
Amounts recognized in profit or loss	534,361	(111,177)
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	(7,007,277)	(7,541,638)	(7,430,461)
Finance lease
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(405,639)	(415,558)
Amounts recognized in profit or loss	179,943	9,919
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	(225,696)	(405,639)	(415,558)
Intangible Assets
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(24,931)	(31,481)
Amounts recognized in profit or loss	1,526	6,550
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	(23,405)	(24,931)	(31,481)
Financial assets at fair value through profit or loss
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	3,457	12
Amounts recognized in profit or loss	(5,199)	3,445
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	(1,742)	3,457	12
Financial assets at fair value through other comprehensive income
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	21,143	27,381
Amounts recognized in profit or loss	16,839	25,178
Amount recognized in other comprehensive income (loss)	(10,624)	(31,416)
Amounts recognized directly in equity	0	0
Ending balance	27,358	21,143	27,381
Deferred revenue
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	169,980	186,391
Amounts recognized in profit or loss	(13,580)	(16,411)
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	156,400	169,980	186,391
Provisions
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	7,089,344	6,494,314
Amounts recognized in profit or loss	(47,684)	595,030
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	7,041,660	7,089,344	6,494,314
Doubtful receivables
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	2,474	801
Amounts recognized in profit or loss	(74)	1,673
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	2,400	2,474	801
Other financial liabilities
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	21,418	31,410
Amounts recognized in profit or loss	(3,426)	(14,142)
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	4,150
Ending balance	17,992	21,418	31,410
Gains or losses on foreign exchange translation
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	134,316	91,411
Amounts recognized in profit or loss	(6,306)	42,905
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	128,010	134,316	91,411
Allowance for doubtful accounts
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	58,235	64,264
Amounts recognized in profit or loss	(2,492)	(6,029)
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	55,743	58,235	64,264
Accrued income
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	16,614	10,002
Amounts recognized in profit or loss	17,321	6,612
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	33,935	16,614	10,002
Special deduction for property, plant and equipment
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	(215,159)	(224,127)
Amounts recognized in profit or loss	3,299	8,968
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	(211,860)	(215,159)	(224,127)
Others
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	1,487,572	1,445,827
Amounts recognized in profit or loss	(277,889)	16,456
Amount recognized in other comprehensive income (loss)	6,545	25,289
Amounts recognized directly in equity	0	0
Ending balance	1,216,228	1,487,572	1,445,827
Deferred income tax on unused tax losses and tax credit
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	11,893,560	2,763,752
Amounts recognized in profit or loss	1,694,569	9,129,808
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	13,588,129	11,893,560	2,763,752
Unused tax losses
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	11,662,105	2,559,877
Amounts recognized in profit or loss	1,676,638	9,102,228
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	13,338,743	11,662,105	2,559,877
Excess of donation limit
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	81,046	69,185
Amounts recognized in profit or loss	(34,724)	11,861
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	46,322	81,046	69,185
Tax credit
Deferred tax expenses by origination and reversal of deferred assets and liabilities and temporary differences [Line Items]
Beginning balance	150,409	134,690
Amounts recognized in profit or loss	52,665	15,719
Amount recognized in other comprehensive income (loss)	0	0
Amounts recognized directly in equity	0	0
Ending balance	₩ 203,064	₩ 150,409	₩ 134,690

Income Taxes - Summary of Defer

Income Taxes - Summary of Deferred Income Tax Assets (Liabilities) (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets and liabilities [abstract]
Deferred tax assets	₩ 13,161,802	₩ 10,934,375
Deferred tax liabilities	(5,163,135)	(6,457,103)
Net Deferred tax assets(liabilities)	₩ 7,998,667	₩ 4,477,272	₩ (5,198,946)

Income Taxes - Summary of Deduc

Income Taxes - Summary of Deductible Temporary Differences, Tax Losses and Unused Tax Credits for Which No Deferred Income Tax Assets Were Recognized (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]
Deductible temporary differences and others	₩ 1,811,062	₩ 1,381,532

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Average effective tax rate	[1]
Top of range [member] | Pillar Two Model Rules [member]
Income Taxes [Line Items]
Average effective tax rate		15%
[1]The effective tax rate for the year ended December 31, 2021, 2022 and 2023 is not calculated due to income tax benefit.

Assets Held-for-Sale (Details)

Assets Held-for-Sale (Details) - Non-current assets held for sale - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Assets Held for Sale [Line Items]
Assets Held-for-Sale		₩ 45,648	₩ 44,748
Land
Assets Held for Sale [Line Items]
Assets Held-for-Sale	[1],[2]	31,766	31,766
Buildings
Assets Held for Sale [Line Items]
Assets Held-for-Sale	[1],[2]	13,881	12,981
Structures
Assets Held for Sale [Line Items]
Assets Held-for-Sale	[1]	₩ 1	₩ 1
[1]The board of directors of KEPCO Engineering & Construction Company, Inc., a subsidiary of the Company, made a resolution to sell its old office building in Yongin-si, Gyeonggi-do, and reclassified the buildings, structures, and land as assets held-for-sale expecting its carrying amount would be recovered through a sale transaction. In accordance with the resolution of the Board of Directors on April 1, 2022, a sales contract for the assets scheduled for sale was entered into on April 13, 2022, and the related down payment and interim payment of ￦52,666 million were recorded as long-term advance received.[2]The board of directors of Korea Electric Power Corporation, the controlling company, made a resolution to sell the Uijeongbu substation, and reclassified the buildings and land as assets held-for-sale expecting its carrying amount would be recovered through a sale transaction during the year ended December 31, 2022.

Assets Held-for-Sale (Parenthet

Assets Held-for-Sale (Parenthetical) (Details) ₩ in Millions	Apr. 13, 2022 KRW (₩)
Non-current assets held for sale
Assets Held for Sale [Line Items]
Long term advance received	₩ 52,666

Expenses Classified by Nature_2

Expenses Classified by Nature (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of attribution of expenses by nature to their function [line items]
Raw materials used	₩ 27,135,770	₩ 34,832,581	₩ 18,660,477
Power purchase	38,304,309	41,984,858	21,619,039
Salaries	5,515,166	5,471,459	5,397,682
Retirement benefit expense	460,302	615,370	601,390
Welfare and benefit expense	695,203	695,839	725,998
Insurance expense	147,690	127,507	122,453
Depreciation	12,864,913	12,301,131	11,771,324
Amortization of intangible assets	163,174	156,160	166,161
Bad debt expense	62,808	23,634	17,968
Commission	801,768	771,947	717,559
Advertising expense	39,161	44,291	38,782
Training expense	23,964	22,140	18,206
Vehicle maintenance expense	18,172	21,024	17,001
Publishing expense	6,160	6,746	6,878
Business promotion expense	5,082	6,538	7,299
Rent expense	206,556	234,119	237,884
Telecommunication expense	17,519	17,622	19,528
Transportation expense	103,601	114,857	54,235
Taxes and dues	687,066	676,497	622,826
Expendable supplies expense	54,504	56,776	50,466
Water, light and heating expense	57,407	77,952	55,376
Repairs and maintenance expense	2,774,262	2,739,424	2,617,995
Ordinary development expense	717,561	727,810	689,397
Travel expense	93,497	95,061	78,202
Clothing expense	19,940	21,822	18,534
Survey and analysis expense	5,224	5,448	4,881
Membership fee	16,667	18,381	9,823
Others	1,763,663	2,046,022	2,172,722
Total expenses, by nature	92,761,109	103,913,016	66,520,086
Selling and administrative expense
Disclosure of attribution of expenses by nature to their function [line items]
Raw materials used	0	0	0
Power purchase	0	0	0
Salaries	1,098,460	1,142,360	1,121,188
Retirement benefit expense	89,533	109,758	113,127
Welfare and benefit expense	152,836	155,781	155,558
Insurance expense	27,726	20,835	17,909
Depreciation	241,533	244,676	219,427
Amortization of intangible assets	88,648	85,661	91,428
Bad debt expense	62,808	23,634	17,968
Commission	460,644	420,390	410,287
Advertising expense	30,305	33,739	29,230
Training expense	7,900	7,327	4,923
Vehicle maintenance expense	9,044	10,749	8,849
Publishing expense	3,281	3,732	3,568
Business promotion expense	2,559	3,198	3,522
Rent expense	44,807	47,680	43,650
Telecommunication expense	7,813	7,945	8,569
Transportation expense	1,099	1,012	870
Taxes and dues	112,449	122,177	93,446
Expendable supplies expense	7,252	9,617	9,052
Water, light and heating expense	16,207	17,950	12,351
Repairs and maintenance expense	154,062	152,449	123,134
Ordinary development expense	217,319	213,932	213,936
Travel expense	16,265	16,062	11,099
Clothing expense	10,450	13,044	10,540
Survey and analysis expense	1,068	1,126	889
Membership fee	1,503	1,469	1,331
Others	196,011	143,119	149,945
Total expenses, by nature	3,061,582	3,009,422	2,875,796
Cost of sales
Disclosure of attribution of expenses by nature to their function [line items]
Raw materials used	27,135,770	34,832,581	18,660,477
Power purchase	38,304,309	41,984,858	21,619,039
Salaries	4,416,706	4,329,099	4,276,494
Retirement benefit expense	370,769	505,612	488,263
Welfare and benefit expense	542,367	540,058	570,440
Insurance expense	119,964	106,672	104,544
Depreciation	12,623,380	12,056,455	11,551,897
Amortization of intangible assets	74,526	70,499	74,733
Bad debt expense	0	0	0
Commission	341,124	351,557	307,272
Advertising expense	8,856	10,552	9,552
Training expense	16,064	14,813	13,283
Vehicle maintenance expense	9,128	10,275	8,152
Publishing expense	2,879	3,014	3,310
Business promotion expense	2,523	3,340	3,777
Rent expense	161,749	186,439	194,234
Telecommunication expense	9,706	9,677	10,959
Transportation expense	102,502	113,845	53,365
Taxes and dues	574,617	554,320	529,380
Expendable supplies expense	47,252	47,159	41,414
Water, light and heating expense	41,200	60,002	43,025
Repairs and maintenance expense	2,620,200	2,586,975	2,494,861
Ordinary development expense	500,242	513,878	475,461
Travel expense	77,232	78,999	67,103
Clothing expense	9,490	8,778	7,994
Survey and analysis expense	4,156	4,322	3,992
Membership fee	15,164	16,912	8,492
Others	1,567,652	1,902,903	2,022,777
Total expenses, by nature	₩ 89,699,527	₩ 100,903,594	₩ 63,644,290

Earnings (Loss) Per Share - Sum

Earnings (Loss) Per Share - Summary of Basic Earnings Loss Per Share (Details) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic earnings per share [abstract]
Profit (loss) attributable to owners of the controlling company (previously stated)	₩ (4,822,549)	₩ (24,466,853)	₩ (5,304,522)
Profit (loss) used in the calculation of total basic earnings (loss) per share	₩ (4,822,549)	₩ (24,466,853)	₩ (5,304,522)
Weighted average number of common shares	641,964,077	641,964,077	641,964,077
Basic earnings (loss) per share	₩ (7,512)	₩ (38,112)	₩ (8,263)

Earnings (Loss) Per Share - S_2

Earnings (Loss) Per Share - Summary of Diluted Earnings Loss Per Share (Details) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Diluted earnings per share [abstract]
Profit (loss) used in the calculation of total diluted earnings (loss) per share	₩ (4,822,549)	₩ (24,466,853)	₩ (5,304,522)
Weighted average number of common shares	641,964,077	641,964,077	641,964,077
Diluted weighted average number of shares	641,964,077	641,964,077	641,964,077
Diluted earnings (loss) per share	₩ (7,512)	₩ (38,112)	₩ (8,263)

Risk Management - Summary of Ca

Risk Management - Summary of Capital Risk Management (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of Capital risk management [Abstract]
Total borrowings and debt securities	₩ 133,631,830	₩ 120,605,365
Cash and cash equivalents	4,342,887	3,234,780	₩ 2,635,238	₩ 2,029,584
Net borrowings and debt securities	129,288,943	117,370,585
Total equity	₩ 37,264,750	₩ 42,000,256	₩ 65,326,706	₩ 70,668,059
Debt to equity ratio	346.95%	279.45%

Risk Management - Summary of Ma

Risk Management - Summary of Maximum Exposure to Credit Risk (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		₩ 4,342,887	₩ 3,234,780
Financial assets at fair value through profit or loss
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	[1]	2,590,228	3,610,408
Derivative assets (trading)
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		730,948	693,072
Financial assets at fair value through other comprehensive income (debt securities)
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		4,627	529
Financial assets at amortized cost
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		38,843	26,998
Loans
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		988,331	1,013,371
Long-term/short-term financial instruments
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		1,412,315	1,353,080
Derivative assets (applying hedge accounting)
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		269,446	324,952
Trade and other receivables
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	[2]	14,179,322	12,614,902
Financial guarantee contracts
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk		₩ 4,399,189	₩ 3,776,060
[1]Equity investments held by the Company are excluded.[2]Maximum exposure associated with the financial guarantee contracts is the maximum amounts of the obligation.

Risk Management - Summary of Se

Risk Management - Summary of Sensitivity Analysis for Actuarial Assumptions (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase movements in discount rate on plan asset	1%	1%
Decrease movements in discount rate on plan asset	1%	1%
1% Increase	₩ 29,993	₩ 27,495
1% Decrease	29,993	27,495
Actuarial assumption of expected rates of salary increases
Disclosure of sensitivity analysis for actuarial assumptions [line items]
1% Increase	392,392	321,930
1% Decrease	(361,359)	(283,658)
Actuarial assumption of discount rates
Disclosure of sensitivity analysis for actuarial assumptions [line items]
1% Increase	(371,103)	(289,229)
1% Decrease	₩ 415,361	₩ 337,033

Risk Management - Summary of Pr

Risk Management - Summary of Principal Assumptions on Provisions Valuation (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
PCBs
Disclosure of Principal assumptions on provisions valuation [Line Items]
Inflation rate	2.40%	1.98%
Discount rate	2.12%	1.92%
Nuclear plants
Disclosure of Principal assumptions on provisions valuation [Line Items]
Inflation rate	1.91%	2.25%
Discount rate	2.76%	2.48%
Spent fuel
Disclosure of Principal assumptions on provisions valuation [Line Items]
Inflation rate	1.91%	2.93%
Discount rate	2.49%	4.49%
Radioactive waste
Disclosure of Principal assumptions on provisions valuation [Line Items]
Inflation rate	3.89%	3.06%
Discount rate	3.65%	2.62%

Risk Management - Summary of _2

Risk Management - Summary of Sensitivity Analysis for Provisions Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
PCBs | Discount rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	$ (123)	$ (169)
0.1% Decrease	123	169
PCBs | Inflation rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	123	169
0.1% Decrease	(123)	(169)
Nuclear plants | Discount rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	(418,570)	(474,432)
0.1% Decrease	432,847	491,360
Nuclear plants | Inflation rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	458,047	515,262
0.1% Decrease	(443,531)	(498,258)
Spent fuel | Discount rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	(130,065)	(54,330)
0.1% Decrease	130,761	56,453
Spent fuel | Inflation rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	133,931	57,269
0.1% Decrease	(128,607)	(55,191)
Radioactive waste | Discount rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	(13,538)	(15,089)
0.1% Decrease	13,683	15,260
Radioactive waste | Inflation rate
Disclosure of Sensitivity analysis for provisions assumptions [Line Items]
0.1% Increase	13,291	14,190
0.1% Decrease	$ (13,174)	$ (14,056)

Risk Management - Summary of _3

Risk Management - Summary of Sensitivity Analysis for Provisions Assumptions (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Sensitivity analysis for provisions assumptions [Abstract]
Percentage of reasonably possible increase in provision assumption​	0.10%	0.10%
Percentage of reasonably possible decrease in provision assumption	0.10%	0.10%

Risk Management - Summary of Fo

Risk Management - Summary of Foreign Currency Risk (Details) ₽ in Thousands, ₸ in Thousands, ₱ in Thousands, € in Thousands, ₫ in Thousands, ₨ in Thousands, ₨ in Thousands, ฿ in Thousands, ৳ in Thousands, ر.س in Thousands, ج.م. in Thousands, ¥ in Thousands, £ in Thousands, kr in Thousands, SFr in Thousands, Rp in Thousands, RM in Thousands, R in Thousands, P in Thousands, Kč in Thousands, K in Thousands, JD in Thousands, Ar in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions, د.إ in Millions

Dec. 31, 2023 KRW (₩)

Dec. 31, 2023 AED (د.إ)

Dec. 31, 2023 AUD ($)

Dec. 31, 2023 BDT (৳)

Dec. 31, 2023 BWP (P)

Dec. 31, 2023 EGP (ج.م.)

Dec. 31, 2023 CAD ($)

Dec. 31, 2023 CHF (SFr)

Dec. 31, 2023 CZK (Kč)

Dec. 31, 2023 EUR (€)

Dec. 31, 2023 GBP (£)

Dec. 31, 2023 HKD ($)

Dec. 31, 2023 IDR (Rp)

Dec. 31, 2023 INR (₨)

Dec. 31, 2023 JOD (JD)

Dec. 31, 2023 JPY (¥)

Dec. 31, 2023 KZT (₸)

Dec. 31, 2023 MGA (Ar)

Dec. 31, 2023 MMK (K)

Dec. 31, 2023 MYR (RM)

Dec. 31, 2023 PHP (₱)

Dec. 31, 2023 PKR (₨)

Dec. 31, 2023 RUB (₽)

Dec. 31, 2023 SAR (ر.س)

Dec. 31, 2023 SEK (kr)

Dec. 31, 2023 SGD ($)

Dec. 31, 2023 THB (฿)

Dec. 31, 2023 USD ($)

Dec. 31, 2023 UYU ($)

Dec. 31, 2023 VND (₫)

Dec. 31, 2023 ZAR (R)

Dec. 31, 2022 KRW (₩)

Dec. 31, 2022 AED (د.إ)

Dec. 31, 2022 AUD ($)

Dec. 31, 2022 BDT (৳)

Dec. 31, 2022 BWP (P)

Dec. 31, 2022 EGP (ج.م.)

Dec. 31, 2022 CAD ($)

Dec. 31, 2022 CHF (SFr)

Dec. 31, 2022 CZK (Kč)

Dec. 31, 2022 EUR (€)

Dec. 31, 2022 GBP (£)

Dec. 31, 2022 HKD ($)

Dec. 31, 2022 IDR (Rp)

Dec. 31, 2022 INR (₨)

Dec. 31, 2022 JOD (JD)

Dec. 31, 2022 JPY (¥)

Dec. 31, 2022 KZT (₸)

Dec. 31, 2022 MGA (Ar)

Dec. 31, 2022 MMK (K)

Dec. 31, 2022 MYR (RM)

Dec. 31, 2022 PHP (₱)

Dec. 31, 2022 PKR (₨)

Dec. 31, 2022 RUB (₽)

Dec. 31, 2022 SAR (ر.س)

Dec. 31, 2022 SEK (kr)

Dec. 31, 2022 SGD ($)

Dec. 31, 2022 THB (฿)

Dec. 31, 2022 USD ($)

Dec. 31, 2022 UYU ($)

Dec. 31, 2022 VND (₫)

Dec. 31, 2022 ZAR (R)

Disclosure Of Foreign Currency Risk [Line Items]

Assets

₩ 239,714,965

₩ 234,804,994

Liabilities

₩ 202,450,215

₩ 192,804,738

Currency risk

Disclosure Of Foreign Currency Risk [Line Items]

Assets

د.إ 24,441

$ 4,310

৳ 2,260

P 777

ج.م. 1,665

$ 0

SFr 0

Kč 0

€ 12,259

£ 75

$ 0

Rp 25,567,281

₨ 1,663,705

JD 569

¥ 921,120

₸ 1,510

Ar 3,545,076

K 199,518

RM 2,805

₱ 98,154

₨ 75,206,354

₽ 0

ر.س 937

kr 0

$ 279

฿ 0

$ 1,701,494

$ 120,768

₫ 848,242

R 87,780

د.إ 5,610

$ 4,448

৳ 7,514

P 824

ج.م. 0

$ 89

SFr 0

Kč 0

€ 1,976

£ 0

$ 0

Rp 598,697

₨ 1,592,380

JD 1,146

¥ 568,263

₸ 1,510

Ar 2,856,045

K 199,518

RM 38,177

₱ 68,592

₨ 533,816

₽ 0

ر.س 1,713

kr 0

$ 0

฿ 0

$ 1,484,614

$ 128,674

₫ 1,184,670

R 43,461

Liabilities

د.إ 18,143

$ 299,795

৳ 0

P 0

ج.م. 1,941

$ 0

SFr 499,930

Kč 0

€ 81,744

£ 0

$ 5,079,189

Rp 2,118,580

₨ 387,947

JD 68,448

¥ 8,692,604

₸ 0

Ar 495,288

K 0

RM 0

₱ 6,750

₨ 55,531

₽ 0

ر.س 0

kr 452,309

$ 2,191

฿ 0

$ 14,458,985

$ 2,028

₫ 0

R 0

د.إ 25,597

$ 299,663

৳ 0

P 0

ج.م. 1,162

$ 595

SFr 500,158

Kč 153

€ 41,073

£ 31

$ 4,014,446

Rp 1,323,840

₨ 312,978

JD 14

¥ 1,719,846

₸ 0

Ar 347,403

K 0

RM 0

₱ 7,493

₨ 219,341

₽ 2,881

ر.س 9,710

kr 449,211

$ 0

฿ 389

$ 13,599,643

$ 3,106

₫ 4,495

R 0

Risk Management - Summary of _4

Risk Management - Summary of Sensitivity Analysis for Foreign Currency Exchange Rates (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Increase (decrease) of profit before income tax
Disclosure of sensitivity analysis for foreign currency exchange rates [Line Items]
10% Increase		₩ (1,828,308)	₩ (1,703,053)
10% Decrease		1,828,308	1,703,053
Increase (decrease) of equity
Disclosure of sensitivity analysis for foreign currency exchange rates [Line Items]
10% Increase	[1]	(1,828,308)	(1,703,053)
10% Decrease	[1]	₩ 1,828,308	₩ 1,703,053
[1]The effect on the shareholders’ equity excluding the impact of income taxes.

Risk Management - Summary of _5

Risk Management - Summary of Sensitivity Analysis for Foreign Currency Exchange Rates (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Sensitivity analysis for Foreign currency exchange rates [Abstract]
Percentage of reasonably possible increase in foreign currency exchange rates	10%	10%
Percentage of reasonably possible decrease in foreign currency exchange rates	10%	10%

Risk Management - Summary of In

Risk Management - Summary of Interest Rate Risk (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial instruments by type of interest rate [line items]
Short-term borrowings	₩ 16,446,821	₩ 12,457,853
Long-term borrowings	3,392,831	2,962,323
Floating interest rate [member]
Disclosure of financial instruments by type of interest rate [line items]
Short-term borrowings	4,435,420	3,154,972
Long-term borrowings	7,766,588	5,388,073
Debt securities	305,602	269,101
Total	₩ 12,507,610	₩ 8,812,146

Risk Management - Summary of _6

Risk Management - Summary of Sensitivity Analysis for Interest Rates (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Increase (decrease) of profit before income tax
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items]
1% Increase		₩ (125,076)	₩ (88,121)
1% Decrease		125,076	88,121
Increase (decrease) of shareholder's equity
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items]
1% Increase	[1]	(125,076)	(88,121)
1% Decrease	[1]	₩ 125,076	₩ 88,121
[1]The effect on the shareholders’ equity excluding the impact of income taxes.

Risk Management - Summary of _7

Risk Management - Summary of Sensitivity Analysis for Interest Rates (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items]
Percentage of increase in interest rates	1%	1%
Percentage of decrease in interest rates	1%	1%

Risk Management - Summary of _8

Risk Management - Summary of Sensitivity Analysis for Electricity Rates (Details) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Increase (decrease) of profit before income tax
Disclosure of Sensitivity analysis for electricity rates [Line Items]
1% Increase		₩ 829,548	₩ 661,990
1% Decrease		(829,548)	(661,990)
Increase (decrease) of shareholder's equity
Disclosure of Sensitivity analysis for electricity rates [Line Items]
1% Increase	[1]	829,548	661,990
1% Decrease	[1]	₩ (829,548)	₩ (661,990)
[1]The effect on the equity excluding the impact of income taxes.

Risk Management - Summary of _9

Risk Management - Summary of Sensitivity Analysis for Electricity Rates (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Sensitivity analysis for electricity rates [Line Items]
Percentage of increase in electricity rates	1%	1%
Percentage of decrease in electricity rates	1%	1%

Risk Management - Summary of_10

Risk Management - Summary of Maturity Analysis for Non Derivative Financial Liabilities (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Borrowings and debt securities		₩ 155,124,645	₩ 138,002,832
Lease liabilities		4,235,100	4,612,352
Trade and other payables	[1]	10,264,050	13,459,320
Financial guarantee contracts	[2]	4,399,189	3,776,060
Non-derivative financial liabilities, undiscounted cash flows		174,022,984	159,850,564
Financial guarantee liabilities		49,992	67,240
Less than 1 year
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Borrowings and debt securities		50,878,929	26,157,747
Lease liabilities		641,525	639,756
Trade and other payables	[1]	8,477,209	11,369,512
Financial guarantee contracts	[2]	121,415	105,091
Non-derivative financial liabilities, undiscounted cash flows		60,119,078	38,272,106
1~2 Years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Borrowings and debt securities		29,046,036	27,367,577
Lease liabilities		588,850	657,210
Trade and other payables	[1]	364,443	347,563
Financial guarantee contracts	[2]	2,546,689	54,310
Non-derivative financial liabilities, undiscounted cash flows		32,546,018	28,426,660
2~5 Years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Borrowings and debt securities		42,420,850	47,361,676
Lease liabilities		1,309,996	1,390,374
Trade and other payables	[1]	833,394	1,008,133
Financial guarantee contracts	[2]	1,645,488	3,495,437
Non-derivative financial liabilities, undiscounted cash flows		46,209,728	53,255,620
More than 5 years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Borrowings and debt securities		32,778,830	37,115,832
Lease liabilities		1,694,729	1,925,012
Trade and other payables	[1]	589,004	734,112
Financial guarantee contracts	[2]	85,597	121,222
Non-derivative financial liabilities, undiscounted cash flows		₩ 35,148,160	₩ 39,896,178
[1]Excludes lease liabilities.[2]This represents the total guarantee amounts associated with the financial guarantee contracts. Financial guarantee liabilities which are recognized as of December 31, 2022 and 2023 are W67,240 and ￦49,992 million, respectively.

Risk Management - Summary of_11

Risk Management - Summary of Maturity Analysis for Non Derivative Financial Assets (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Cash and cash equivalents		₩ 4,342,887	₩ 3,234,780
Financial assets at fair value through other comprehensive income		502,443	502,829
Financial assets at amortized cost		38,843	26,998
Loans		1,024,806	1,046,521
Long-term/short-term financial instruments		1,412,315	1,353,080
Financial assets at fair value through profit or loss		2,711,285	3,709,508
Trade and other receivables		14,196,156	12,628,615
Financial assets held for managing liquidity risk		24,228,735	22,502,331
Less than 1 year
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Cash and cash equivalents		4,342,887	3,234,780
Financial assets at fair value through other comprehensive income		0	0
Financial assets at amortized cost		28,905	16,762
Loans		139,168	132,877
Long-term/short-term financial instruments		578,578	666,758
Financial assets at fair value through profit or loss		2,054,021	3,181,791
Trade and other receivables		11,990,515	10,464,191
Financial assets held for managing liquidity risk		19,134,074	17,697,159
1~5 Years
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Cash and cash equivalents		0	0
Financial assets at fair value through other comprehensive income		0	0
Financial assets at amortized cost		9,938	10,231
Loans		465,666	411,594
Long-term/short-term financial instruments		22	0
Financial assets at fair value through profit or loss		1,381	645
Trade and other receivables		911,822	1,083,593
Financial assets held for managing liquidity risk		1,388,829	1,506,063
More than 5 years
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Cash and cash equivalents		0	0
Financial assets at fair value through other comprehensive income		0	0
Financial assets at amortized cost		0	5
Loans		411,100	502,050
Long-term/short-term financial instruments		23	25
Financial assets at fair value through profit or loss		6,523	3,535
Trade and other receivables		1,292,539	1,080,831
Financial assets held for managing liquidity risk		1,710,185	1,586,446
Other
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Cash and cash equivalents	[1]	0	0
Financial assets at fair value through other comprehensive income	[1]	502,443	502,829
Financial assets at amortized cost	[1]	0	0
Loans	[1]	8,872	0
Long-term/short-term financial instruments	[1]	833,692	686,297
Financial assets at fair value through profit or loss	[1]	649,360	523,537
Trade and other receivables	[1]	1,280	0
Financial assets held for managing liquidity risk	[1]	₩ 1,995,647	₩ 1,712,663
[1]The maturities cannot be presently determined.

Risk Management - Summary of_12

Risk Management - Summary of Maturity Analysis for Derivative Financial Assets and Liabilities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	₩ (389,410)	₩ (339,447)
Derivative financial assets, undiscounted cash flows	966,424	1,048,713
Net settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	0	0
Derivative financial assets, undiscounted cash flows	0	0
Gross settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(365,846)	(313,942)
Derivative financial assets, undiscounted cash flows	694,937	735,563
Gross settlement | Designated as Hedging Instrument
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(23,564)	(25,505)
Derivative financial assets, undiscounted cash flows	271,487	313,150
Less than 1 year
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(22,571)	(42,663)
Derivative financial assets, undiscounted cash flows	335,842	996,011
Less than 1 year | Net settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	0	0
Derivative financial assets, undiscounted cash flows	0	0
Less than 1 year | Gross settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(22,571)	(42,663)
Derivative financial assets, undiscounted cash flows	257,073	861,621
Less than 1 year | Gross settlement | Designated as Hedging Instrument
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	0	0
Derivative financial assets, undiscounted cash flows	78,769	134,390
1~2 Years
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(16,246)	(25,289)
Derivative financial assets, undiscounted cash flows	184,163	208,440
1~2 Years | Net settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	0	0
Derivative financial assets, undiscounted cash flows	0	0
1~2 Years | Gross settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(11,566)	(15,225)
Derivative financial assets, undiscounted cash flows	123,132	160,938
1~2 Years | Gross settlement | Designated as Hedging Instrument
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(4,680)	(10,064)
Derivative financial assets, undiscounted cash flows	61,031	47,502
2~5 Years
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(214,833)	(176,306)
Derivative financial assets, undiscounted cash flows	300,691	(221,399)
2~5 Years | Net settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	0	0
Derivative financial assets, undiscounted cash flows	0	0
2~5 Years | Gross settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(201,590)	(171,130)
Derivative financial assets, undiscounted cash flows	169,004	(352,657)
2~5 Years | Gross settlement | Designated as Hedging Instrument
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(13,243)	(5,176)
Derivative financial assets, undiscounted cash flows	131,687	131,258
More than 5 years
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(135,760)	(95,189)
Derivative financial assets, undiscounted cash flows	145,728	65,661
More than 5 years | Net settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	0	0
Derivative financial assets, undiscounted cash flows	0	0
More than 5 years | Gross settlement | Not Designated as Hedging Instrument Trading
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(130,119)	(84,924)
Derivative financial assets, undiscounted cash flows	145,728	65,661
More than 5 years | Gross settlement | Designated as Hedging Instrument
Disclosure of maturity analysis for derivative financial liabilities [line items]
Derivative financial liabilities, undiscounted cash flows	(5,641)	(10,265)
Derivative financial assets, undiscounted cash flows	₩ 0	₩ 0

Risk Management - Summary of Fa

Risk Management - Summary of Fair Value Measurement of Financial Assets (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets [line items]
Financial assets	₩ 25,175,820	₩ 23,473,492
At fair value
Disclosure of financial assets [line items]
Financial assets	4,214,122	5,230,361
Financial assets, at fair value	4,214,122	5,230,361
At amortized cost
Disclosure of financial assets [line items]
Financial assets	20,961,698	18,243,131
Financial assets, at fair value	20,961,698	18,243,131
Financial assets at fair value through other comprehensive income | At fair value
Disclosure of financial assets [line items]
Financial assets	502,443	502,829
Financial assets, at fair value	502,443	502,829
Derivative assets | Not Designated as Hedging Instrument | At fair value
Disclosure of financial assets [line items]
Financial assets	730,948	693,072
Financial assets, at fair value	730,948	693,072
Derivative assets | Designated as Hedging Instrument | At fair value
Disclosure of financial assets [line items]
Financial assets	269,446	324,952
Financial assets, at fair value	269,446	324,952
Financial assets at fair value through profit or loss | At fair value
Disclosure of financial assets [line items]
Financial assets	2,711,285	3,709,508
Financial assets, at fair value	2,711,285	3,709,508
Financial assets at amortized cost | At amortized cost
Disclosure of financial assets [line items]
Financial assets	38,843	26,998
Financial assets, at fair value	38,843	26,998
Loans and receivables | At amortized cost
Disclosure of financial assets [line items]
Financial assets	988,331	1,013,371
Financial assets, at fair value	988,331	1,013,371
Trade receivables | At amortized cost
Disclosure of financial assets [line items]
Financial assets	14,179,322	12,614,902
Financial assets, at fair value	14,179,322	12,614,902
Long-term financial instruments | At amortized cost
Disclosure of financial assets [line items]
Financial assets	833,737	686,322
Financial assets, at fair value	833,737	686,322
Short-term financial instruments | At amortized cost
Disclosure of financial assets [line items]
Financial assets	578,578	666,758
Financial assets, at fair value	578,578	666,758
Cash and cash equivalents | At amortized cost
Disclosure of financial assets [line items]
Financial assets	4,342,887	3,234,780
Financial assets, at fair value	₩ 4,342,887	₩ 3,234,780

Risk Management - Summary of_13

Risk Management - Summary of Fair Value Measurement of Financial Liabilities (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial liabilities [line items]
Financial liabilities		₩ 148,155,994	₩ 138,660,579
At fair value
Disclosure of financial liabilities [line items]
Financial liabilities		452,234	432,751
Financial liabilities, at fair value		452,234	432,751
At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		147,703,760	138,227,828
Financial liabilities, at fair value		145,129,539	129,887,195
Derivative liabilities | Not Designated as Hedging Instrument | At fair value
Disclosure of financial liabilities [line items]
Financial liabilities		428,670	407,246
Financial liabilities, at fair value		428,670	407,246
Derivative liabilities | Designated as Hedging Instrument | At fair value
Disclosure of financial liabilities [line items]
Financial liabilities		23,564	25,505
Financial liabilities, at fair value		23,564	25,505
Secured borrowings | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		773,646	102,368
Financial liabilities, at fair value		773,646	102,368
Unsecured bond | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		113,792,178	105,185,189
Financial liabilities, at fair value		111,218,771	96,846,056
Lease liabilities | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		3,807,880	4,163,143
Financial liabilities, at fair value		3,807,880	4,163,143
Unsecured borrowings | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		19,062,162	15,282,193
Financial liabilities, at fair value		19,061,348	15,280,693
Trade and other payables | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities	[1]	10,264,050	13,459,320
Financial liabilities, at fair value	[1]	10,264,050	13,459,320
Bank overdraft | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		3,844	35,615
Financial liabilities, at fair value		₩ 3,844	₩ 35,615
[1]Excludes lease liabilities.

Risk Management - Summary of Si

Risk Management - Summary of Significant Unobservable Inputs Used in Fair Value Measurement of Financial Instruments (Details)	Dec. 31, 2023	Dec. 31, 2022
Bottom of range
Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items]
Derivatives	0.93%	0.60%
Borrowings and debt securities	0.96%	0.75%
Finance lease	0%	0%
Top of range
Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items]
Derivatives	10.36%	7.93%
Borrowings and debt securities	5.84%	5.84%
Finance lease	17.03%	17.08%

Risk Management - Summary of_14

Risk Management - Summary of Fair Value Measurement of Assets (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value through other comprehensive income	₩ 502,443	₩ 502,829	₩ 435,107
At fair value
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value through other comprehensive income	502,443	502,829
Derivative assets	1,000,394	1,018,024
Financial assets at fair value through profit or loss	2,711,285	3,709,508
Total	4,214,122	5,230,361
At fair value | Level 1
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value through other comprehensive income	285,054	300,057
Derivative assets	0	0
Financial assets at fair value through profit or loss	0	0
Total	285,054	300,057
At fair value | Level 2
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value through other comprehensive income	0	0
Derivative assets	1,000,394	1,018,024
Financial assets at fair value through profit or loss	2,704,550	3,703,179
Total	3,704,944	4,721,203
At fair value | Level 3
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value through other comprehensive income	217,389	202,772
Derivative assets	0	0
Financial assets at fair value through profit or loss	6,735	6,329
Total	₩ 224,124	₩ 209,101

Risk Management - Summary of_15

Risk Management - Summary of Fair Value Measurement of Financial Instruments (Details) - At fair value - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of fair value measurement of liabilities [line items]
Derivative liabilities	₩ 452,234	₩ 432,751
Level 1
Disclosure of fair value measurement of liabilities [line items]
Derivative liabilities	0	0
Level 2
Disclosure of fair value measurement of liabilities [line items]
Derivative liabilities	452,234	432,751
Level 3
Disclosure of fair value measurement of liabilities [line items]
Derivative liabilities	₩ 0	₩ 0

Risk Management - Summary of Re

Risk Management - Summary of Reconciliation of Changes in Fair Value Measurement, Assets (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes in fair value measurement, assets
Beginning balance	₩ 23,473,492
Ending balance	25,175,820	₩ 23,473,492
At fair value
Changes in fair value measurement, assets
Beginning balance	5,230,361
Ending balance	4,214,122	5,230,361
At fair value | Level 3 | Financial assets at fair value through profit or loss, category [member]
Changes in fair value measurement, assets
Beginning balance	6,329	5,797
Acquisition	0	400
Reclassified category	270	0
Valuation	136	132
Disposal	0	0
Foreign currency translation and others	0	0
Ending balance	6,735	6,329
At fair value | Level 3 | Financial assets at fair value through other comprehensive income, category [member] | Unlisted Securities [Member]
Changes in fair value measurement, assets
Beginning balance	202,243	160,790
Acquisition	9,550	9,451
Reclassified category	0	0
Valuation	5,445	33,237
Disposal	(5,332)	0
Foreign currency translation and others	856	(1,235)
Ending balance	212,762	202,243
At fair value | Level 3 | Financial assets at fair value through other comprehensive income, category [member] | Debt securities [member]
Changes in fair value measurement, assets
Beginning balance	529	491
Acquisition	4,080	0
Reclassified category	0	0
Valuation	18	38
Disposal	0	0
Foreign currency translation and others	0	0
Ending balance	₩ 4,627	₩ 529

Service Concession Arrangemen_3

Service Concession Arrangements - Summary of Service Concession Arrangements (Details) ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Disclosure of detailed information about service concession arrangements [line items]
Hydroelectric Power Generation at Semangka, Indonesia (BOT)	₩ 622,598
CPPAg Power Generation	1,120,405
Less than 1 year
Disclosure of detailed information about service concession arrangements [line items]
Hydroelectric Power Generation at Semangka, Indonesia (BOT)	32,354
CPPAg Power Generation	75,717
1~2 Years
Disclosure of detailed information about service concession arrangements [line items]
Hydroelectric Power Generation at Semangka, Indonesia (BOT)	32,281
CPPAg Power Generation	75,717
2~3 Years
Disclosure of detailed information about service concession arrangements [line items]
Hydroelectric Power Generation at Semangka, Indonesia (BOT)	32,321
CPPAg Power Generation	75,717
Over 3 years
Disclosure of detailed information about service concession arrangements [line items]
Hydroelectric Power Generation at Semangka, Indonesia (BOT)	525,642
CPPAg Power Generation	₩ 893,254

Related Parties - Summary of Tr

Related Parties - Summary of Transactions Between Related Parties (Details) $ in Thousands, ₩ in Millions		12 Months Ended
		Dec. 31, 2023 KRW (₩)		Dec. 31, 2023 USD ($)	Dec. 31, 2022 KRW (₩)		Dec. 31, 2022 USD ($)	Dec. 31, 2021 KRW (₩)	Dec. 31, 2021 USD ($)
Disclosure of transactions between related parties [line items]
Dividend income		₩ 25,941			₩ 28,875			₩ 10,522
Korea Gas Corporation
Disclosure of transactions between related parties [line items]
Electricity sales		140,630			155,309			96,362
Electricity purchase		8,873,781			11,996,402			5,646,713
Outstanding balances for related party transactions [abstract]
Trade receivables		14,671			12,415
Trade payables		480,974			1,882,607
Non-trade receivables and others		12,513			54,232
Non-trade payables and others		1,378			1,294
Goseong Green Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		842,270			1,062,108			514,470
Electricity purchase		1,572,074			1,905,502			987,540
Outstanding balances for related party transactions [abstract]
Trade receivables		55,719			76,254
Trade payables		120,270			182,095
Non-trade receivables and others		15			14
Non-trade payables and others		48,621			52,515
Dongducheon Dream Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		16,138			8,942			19,923
Electricity purchase		1,744,247			2,244,332			750,148
Outstanding balances for related party transactions [abstract]
Trade receivables		2,573			592
Trade payables		117,975			293,256
Non-trade receivables and others		478			270
Saemangeum Sebit Power Plant Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2,313			1,418			0
Electricity purchase		22,365			23,159			0
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		341			653
Non-trade payables and others					0
Daejung Offshore Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		84			46			46
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		263			123
Daegu Photovoltaic Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		408			268			207
Electricity purchase		4,247			4,744			3,532
Outstanding balances for related party transactions [abstract]
Trade payables		105			135
Non-trade payables and others					2
Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3			2			2
Electricity purchase		408			563			393
Korea Electric Power Industrial Development Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		11,115			10,369			11,208
Service		305,105			251,468			241,925
Outstanding balances for related party transactions [abstract]
Trade receivables		176			164
Trade payables		2,021			150
Non-trade receivables and others					2
Non-trade payables and others		8,077			9,588
Gangneung Eco Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Fuel sales		943,063			459,404			14,200
Others		6,996			0			0
Outstanding balances for related party transactions [abstract]
Trade receivables		59,623			19,364
Non-trade receivables and others					478
Non-trade payables and others		94			94
Shin Pyeongtaek Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		91,830			27,486			23,501
Electricity purchase		1,040,965			957,294			653,306
Outstanding balances for related party transactions [abstract]
Trade receivables		1,814			7,375
Trade payables		86,801			109,274
Non-trade receivables and others		4,933			1,068
Non-trade payables and others		385			101
Noeul Green Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		8,431			9,396			30
Electricity purchase		10,466			14,176			10,014
Outstanding balances for related party transactions [abstract]
Trade receivables		6			3
Non-trade receivables and others		18,356			9,365
Non-trade payables and others		3,005			2,468
Samcheok Eco Materials Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		615			546			620
Electricity purchase		8,130			12,019			13,612
Outstanding balances for related party transactions [abstract]
Trade receivables		33			46
YTN Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2,908			2,180			1,922
Electricity purchase		309			304			388
Outstanding balances for related party transactions [abstract]
Trade receivables		133			112
Busan Green Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		10,733			5,055			49
Electricity purchase		23,211			26,219			18,996
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
Non-trade receivables and others		32,720			26,681
Non-trade payables and others		3,642			4,415
Gunsan Bio Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		0			0			20
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others	[1]				11,728
Korea Electric Vehicle Charging Service
Disclosure of transactions between related parties [line items]
Electricity sales	[2]	0			3,686			3,039
Electricity purchase	[2]	0			0			393
Energy Infra Asset Management Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		89			0			4,629
Service		2,701			2,779			2,657
YaksuESS Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity purchase		508			851			1,715
Outstanding balances for related party transactions [abstract]
Trade payables		538
Gangwon Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2,464			1,549			1,865
Electricity purchase		32,525			40,130			19,623
Outstanding balances for related party transactions [abstract]
Trade receivables		13			6
Trade payables		3,206			5,197
Goesan Solar park Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity purchase		6,530			7,642			6,209
Outstanding balances for related party transactions [abstract]
Trade payables		56			346
Gwangyang Green Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,492			1,848			486
Outstanding balances for related party transactions [abstract]
Trade receivables		1,069
Non-trade receivables and others		716			1,436
Bigeum Resident Photovoltaic Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		888			660			755
Outstanding balances for related party transactions [abstract]
Trade receivables		406			343
Non-trade receivables and others		1,316			516
Hyundai Green Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales and design service		6,668			7,063			11,934
Outstanding balances for related party transactions [abstract]
Trade receivables		903			839
Korea Power Exchange
Disclosure of transactions between related parties [line items]
Service		52,262			16,596			39,796
Service		82,572			93,817			86,716
Outstanding balances for related party transactions [abstract]
Trade receivables		1,583			223
Trade payables		16,367
Non-trade receivables and others		1
Non-trade payables and others		2,520			2,405
Taebaek Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Service	[3]	0			861			44
Others	[3]	2,864			0			0
Service	[3]	7,476			0			0
Service and REC	[3]	0			7,442			5,930
Outstanding balances for related party transactions [abstract]
Trade payables		603	[3]		680
Non-trade payables and others		341	[3]		178
Taebaek Guinemi Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		0			0			26
Electricity purchase		5,529			6,793			5,910
Outstanding balances for related party transactions [abstract]
Trade payables		572
Non-trade payables and others		286			885
Pyeongchang Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		0			1,323			1,180
Design service and others		0			3,884			4,099
Outstanding balances for related party transactions [abstract]
Trade receivables		4			3	[3]
Non-trade payables and others					211
Pyeongchang Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2,087			0			0
REC and others		3,542			0			0
Daeryun Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3,187			2,016			1,944
Electricity purchase		353,371			428,534			157,234
Outstanding balances for related party transactions [abstract]
Trade receivables		326			195
Trade payables		32,140			55,725
Changjuk Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales	[4]	0			1,350			463
Electricity purchase	[4]	0			9,027			6,213
GS Donghae Electric Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		28,164			5,238			21,127
Electricity purchase		1,047,584			1,035,263			760,377
Outstanding balances for related party transactions [abstract]
Trade receivables		159			872
Trade payables		72,951			72,947
Non-trade receivables and others		169			1,558
Non-trade payables and others		125			14,565
KNH Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		15			13			14
Electricity purchase		3,535			4,348			3,222
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
S-Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		4,965			4,588			5,229
Service		973,646			1,091,741			608,530
Outstanding balances for related party transactions [abstract]
Trade receivables		213			77
Trade payables		79,459			135,504
Non-trade receivables and others		53			44
Non-trade payables and others					11
Chuncheon Green Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		82			2			0
Yeongyang Wind Power Corporation II
Disclosure of transactions between related parties [line items]
Commission		150			0			0
Commission		1,457			0			0
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		165
PND Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		547			427			416
Electricity purchase		5,301			6,173			5,502
Outstanding balances for related party transactions [abstract]
Trade payables		296			210
Hyundai Eco Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,236			277			187
Electricity purchase		26,266			29,209			25,762
Outstanding balances for related party transactions [abstract]
Trade receivables		28			22
Trade payables		408			738
YeongGwang Yaksu Wind Electric Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		96			66			78
Electricity purchase		6,776			7,382			11,729
Outstanding balances for related party transactions [abstract]
Trade receivables		10			7
Trade payables		828			589
Non-trade receivables and others		2,294
Non-trade payables and others					2,050
Taebaek Gadeoksan Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3,998			1,952			295
Electricity purchase		34,940			25,880			16,360
Outstanding balances for related party transactions [abstract]
Trade payables		12,739			12,739
Non-trade receivables and others		1,539			97
Non-trade payables and others		7			5
Korea Energy Solutions Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2			2			2
Electricity purchase		128			102			0
Outstanding balances for related party transactions [abstract]
Non-trade payables and others					94
ITR Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		3			6			3
STN Co., Ltd. (formerly, Structure test network Co., Ltd.)
Disclosure of transactions between related parties [line items]
Service		0			7			5
Others		10			0			0
Green Energy Electricity Generation Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity purchase		948			2,962			1,238
Outstanding balances for related party transactions [abstract]
Trade payables		62
Non-trade payables and others		45
Namjeongsusang Solar Power Operation Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales	[5]	31			21			22
Electricity purchase	[5]	0			9,491			14,286
Outstanding balances for related party transactions [abstract]
Trade receivables	[5]				2
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1
Disclosure of transactions between related parties [line items]
Service		405			394			399
Bitgoel Eco Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,581			1,397			282
Service and others		28,334			930			0
Outstanding balances for related party transactions [abstract]
Trade payables		6,226
Non-trade receivables and others		131			6
Non-trade payables and others					1,023
Jeju Gimnyeong Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		315			367			0
Electricity purchase		8,635			12,364			12,833
Outstanding balances for related party transactions [abstract]
Trade payables		1,467			1,758
Non-trade receivables and others		112			130
Non-trade payables and others		9
Seoroseoro Sunny Power Plant Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2			1			0
REC and others		874			1,138			217
Muan Solar park Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3,083			950			232
REC and others		16,554			17,052			31,017
Outstanding balances for related party transactions [abstract]
Trade receivables					25
Non-trade receivables and others		4			9
YuDang Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		100			160			0
REC and others		1,860			1,915			3,495
Anjwa Smart Farm & Solar City Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2,479			1,068			624
Electricity purchase		17,332			16,942			24,601
Outstanding balances for related party transactions [abstract]
Non-trade payables and others		1,296			921
KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)
Disclosure of transactions between related parties [line items]
Electricity sales		163			185			155
Others		62,212			42,651			0
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
Trade payables		5,485			5,485
Saemangeum Heemang Photovoltaic Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3,538			5,740			13
Electricity purchase		440			1,039			0
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others					3,435
Non-trade payables and others					1
G.GURU Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity purchase		0			452			0
UD4M Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3			2			4
Electricity purchase		117			313			0
Dongbu Highway Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		11			8			5
Electricity purchase		2,937			3,516			2,605
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
Trade payables					2
Non-trade payables and others					2
Seobu Highway Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		12			8			8
Electricity purchase		2,880			3,452			2,963
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
Trade payables					8
Non-trade payables and others					3
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.)
Disclosure of transactions between related parties [line items]
Interest income/ Dividends income	[6]	6			0			0
Green Radiation Co., Ltd.
Disclosure of transactions between related parties [line items]
Ordinary development expense		11			0			0
Santiago Solar Power SpA
Disclosure of transactions between related parties [line items]
Dividend income		586			0			0
Gwangbaek Solar Power Investment Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		644			0			0
Electricity purchase		565			602			742
Outstanding balances for related party transactions [abstract]
Non-trade payables and others					61
Go deok Clean Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		4,685			0			0
Electricity purchase		11,545			0			0
Hankook Electric Power Information Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		0			0			1
SureDataLab Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1			1			1
Suwon New Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		91			118			1,820
Outstanding balances for related party transactions [abstract]
Trade receivables		876			0
Non-trade receivables and others		560			1,280
Non-trade payables and others		0
Kosture Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		0			5			1
Outstanding balances for related party transactions [abstract]
Trade receivables					6
PlatformN. Co., Ltd.
Disclosure of transactions between related parties [line items]
Others		16			14			0
Others		0			475			0
Outstanding balances for related party transactions [abstract]
Non-trade payables and others					232
Gangneung Sacheon Fuel Cell Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		133			151			0
Electricity purchase		1,324			0			0
Muan Sunshine Solar Power Plant Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		403			17			52
Electricity purchase		16,328			19,514			15,900
Outstanding balances for related party transactions [abstract]
Trade payables		1,440			3,076
Non-trade payables and others					1,265
11 Associates (Overseas)
Disclosure of transactions between related parties [line items]
Electricity sales		385,605			548,507			125,723
Electricity purchase		91,233			101,790			502
Seobusambo highway photovoltaics Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		16			3			0
Electricity purchase		502			103			0
Outstanding balances for related party transactions [abstract]
Trade receivables		1
Non-trade receivables and others		4
Yangyang Suri Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		169			0			0
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		55
Naepo Green Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3,462			761			467
Outstanding balances for related party transactions [abstract]
Trade receivables		190			169
Non-trade receivables and others		1
Non-trade payables and others					3
Cheongna Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Others		32,835			39,802			16,469
Electricity purchase		60			80			57
Outstanding balances for related party transactions [abstract]
Trade receivables		13,898			17,324
Non-trade receivables and others		2,160			1,654
Non-trade payables and others		1			1
Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Disclosure of transactions between related parties [line items]
Service		2,110			7,761			8,159
Electricity purchase	[7]	8,151			13,872			5,409
Outstanding balances for related party transactions [abstract]
Trade receivables		84			79
Trade payables		721			1,027
Non-trade receivables and others		10,779			10,218
Non-trade payables and others		14,193			9,119
Daegu Green Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,694			1,190			1,053
Electricity purchase		370,787			508,601			289,052
Outstanding balances for related party transactions [abstract]
Trade receivables		122			53
Non-trade receivables and others		55			56
Non-trade payables and others		32,222			66,715
KAPES, Inc.
Disclosure of transactions between related parties [line items]
Commission		1,604			450			413
Electricity purchase		19,112			9,306			64,140
Outstanding balances for related party transactions [abstract]
Trade receivables		4			2
Non-trade receivables and others		89
Non-trade payables and others		3,791			106
Prime Swedish Holding AB
Disclosure of transactions between related parties [line items]
Electricity sales		292			284			0
Honam Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		610			242			71
Electricity purchase		8,643			7,662			4,807
Outstanding balances for related party transactions [abstract]
Trade payables		515			515
Jeongam Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales and design service		0			0			588
Electricity purchase		0			0			3,145
Korea Power Engineering Service Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		159			268			339
Service		812			830			1,315
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		48			47
Non-trade payables and others		76			77
Seokmun Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		1,792			1,685			1,701
Service		60,009			60,799			44,315
Outstanding balances for related party transactions [abstract]
Trade receivables		44			67
Trade payables		7,000			7,000
Non-trade receivables and others		199			113
Incheon New Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Construction revenue		458			14			14
Chun-cheon Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		2,976			2,505			2,329
Electricity purchase		585,656			585,689			327,536
Outstanding balances for related party transactions [abstract]
Trade receivables		239			124
Trade payables		79,117			79,117
Non-trade receivables and others		165			165
Non-trade payables and others		2
Yeonggwangbaeksu Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,962			1,898			1,836
Electricity purchase		17,228			13,990			9,471
Outstanding balances for related party transactions [abstract]
Trade receivables		10			8
Trade payables		1,076			1,076
Non-trade receivables and others					166
Yeonggwang Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		3,607			871			818
Electricity purchase		40,605			31,221			21,004
Outstanding balances for related party transactions [abstract]
Trade receivables		15			12
Trade payables		2,251			2,251
Non-trade receivables and others		56			62
Western Power Changgi Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		0			0			1,920
Electricity purchase		0			0			5,852
NH-Amundi Global Infrastructure Investment Private Investment Trust 21
Disclosure of transactions between related parties [line items]
Service		1,568			1,415			1,727
KW Nuclear Components Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		1,612			1,624			2,598
Service		14,114			9,504			96
Outstanding balances for related party transactions [abstract]
Trade receivables					4
Non-trade receivables and others		17			18
KEPCO-Uhde Inc.
Disclosure of transactions between related parties [line items]
Electricity sales	[8]	0			12			10
Outstanding balances for related party transactions [abstract]
Non-trade payables and others	[8]				10
Busan Shinho Solar Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,205			502			376
REC and others		10,248			10,601			7,895
Outstanding balances for related party transactions [abstract]
Trade receivables		3			3
Trade payables		304			304
Expressway Solar-light Power Generation Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		43			0			0
Electricity purchase		3,362			4,016			3,146
Outstanding balances for related party transactions [abstract]
Trade payables		220			166
Goheung New Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales	[7]	3,214			141			0
Electricity purchase | $				$ 5,264			$ 0		$ 0
Gunsan Land Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		809			518			0
Electricity purchase		486			533			0
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		295			138
Daesan Green Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		760			394			523
Electricity purchase		139,721			129,736			146,776
Outstanding balances for related party transactions [abstract]
Trade receivables		13			18
Trade payables		4,946			4,946
Non-trade receivables and others		170			218
Cheong-Song Noraesan Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		901			698			30
Electricity purchase		882			980			0
Outstanding balances for related party transactions [abstract]
Trade receivables		2			2
Chungsongmeon BongSan wind power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1			1			1
Saemangeum Solar Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		0			100			1,141
Electricity purchase		0			1			5
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		4,368			4,368
Dangjin Eco Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		40			32			32
Electricity purchase		5,583			5,696			4,139
Outstanding balances for related party transactions [abstract]
Trade receivables		4			3
Trade payables		222			222
Non-trade payables and others		176			105
Yangyang Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		13			0			0
Service and Electricity Sales		10			0			0
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		13
Energyco Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		457			463			1
Electricity purchase		6,539			7,898			0
Outstanding balances for related party transactions [abstract]
Trade payables		99
Non-trade receivables and others		3
Hapcheon Floating Photovoltaic Power Plant Inc.
Disclosure of transactions between related parties [line items]
Electricity sales		88			544			0
Service and REC		0			2,526			0
Outstanding balances for related party transactions [abstract]
Trade receivables		10			9
Non-trade receivables and others		68
Busan Industrial Solar Power Co., Ltd.
Outstanding balances for related party transactions [abstract]
Trade receivables		2			2
Busan Industrial Solar Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		22			14			9
Electricity purchase		3,656			4,575			2,815
Bitsolar Energy Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		357			498			296
Electricity purchase		12,946			13,030			5,703
Outstanding balances for related party transactions [abstract]
Trade payables		201			201
Non-trade receivables and others		1			222
Non-trade payables and others		0
Omisan Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		26			1			1
Electricity purchase		0			0			7
S-Power Chile SpA
Disclosure of transactions between related parties [line items]
Interest income		20			0			0
Haemodum Solar Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		431			42			6
Electricity purchase		402			2,168			1,625
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
Yeongam Solar Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,131			379			339
Electricity purchase		34,981			44,745			47,805
Outstanding balances for related party transactions [abstract]
Trade receivables		56			44
Trade payables		3,517			3,655
Samsu Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		514			0			0
Electricity purchase		8,269			10,605			2,800
Outstanding balances for related party transactions [abstract]
Trade payables		1,229			1,303
Solaseado Solar Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		1,876			1,851			2,890
Electricity purchase	[7]	18,259			28,698			31,031
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		24			23
Non-trade payables and others					2,911
Yeongwol Eco Wind Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		102			0			0
Gurae Resident Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		8			0			0
Electricity purchase		1			0			0
Cheongju Eco Park Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		6,397			204			0
Electricity purchase		95,059			94,409			0
Outstanding balances for related party transactions [abstract]
Trade receivables		6,899
Trade payables		7,994			7,994
Enel X Midland Photovoltaic, LLC
Disclosure of transactions between related parties [line items]
Electricity sales		11			12			0
Electricity purchase		2,431			1,871			0
Outstanding balances for related party transactions [abstract]
Trade receivables		1			1
Trade payables		144			3
Non-trade payables and others		49
Eumseong Eco Park Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		19			2			0
Electricity purchase		27,765			0			0
Geumsungsan Wind Power Co., Ltd.
Disclosure of transactions between related parties [line items]
Electricity sales		68			7			0
Outstanding balances for related party transactions [abstract]
Trade receivables		4			3
Non-trade payables and others					1
41 Joint ventures (Overseas)
Disclosure of transactions between related parties [line items]
Electricity sales		746,989			606,513			773,291
Electricity purchase		17,222			16,859			54,135
Korea Development Bank
Disclosure of transactions between related parties [line items]
Electricity sales		5,467			4,134			4,177
Dividends paid		0			12			256,862
Interest income		5,930			2,222			756
Interest expense		5,559			4,208			2,756
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		33,140			30,836
Non-trade payables and others		147			101
Accrued interest income					5
Derivative assets		45,898			67,662
Derivative liabilities		72,050			3,759
Go deok Clean Energy Co., Ltd
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		4,562
Non-trade payables and others		5,288
9 Associates (Overseas)
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others		77,814			49,409
Non-trade payables and others		6,242			502
Tronix Co., Ltd.
Outstanding balances for related party transactions [abstract]
Non-trade receivables and others					1
8 Associates (Overseas)
Outstanding balances for related party transactions [abstract]
Trade receivables					93
Global Trade Of Power System Co., Ltd.
Disclosure of transactions between related parties [line items]
Service		223			715			₩ 323
26 Joint ventures (Overseas)
Outstanding balances for related party transactions [abstract]
Trade receivables		160,474			73,805
Non-trade receivables and others		55,897			71,661
Non-trade payables and others		22,877			₩ 117,754
KEPCO Lebanon SARL
Outstanding balances for related party transactions [abstract]
Trade receivables	[9]	₩ 75
[1]Busan Green Energy Co., Ltd. was declared bankrupt for the year ended December 31, 2023 and was excluded from an associate due to the appointment of a bankruptcy trustee.[2]Korea Electric Vehicle Charging Service is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2022.[3]Taebaek Wind Power Co., Ltd. was changed from an associate to a joint venture for the year ended December 31, 2023.[4]Changjuk Wind Power Co., Ltd. was reclassified from an associate to a subsidiary for the year ended December 31, 2022, and the amount is before reclassification to a subsidiary.[5]Namjeongsusang Solar Power Operation Co., Ltd. is not a related party of the Company as of December 31, 2023 as the sale of shares was completed for the year ended December 31, 2023.[6]The Company has disposed of shares of Korea Electric Vehicle Charging Service during the year ended December 31, 2022, and it is not a related party to the Company as of December 31, 2022.[7]Reclassified from a joint venture to a subsidiary during the year ended December 31, 2022. Transactions are made before the reclassification.[8]KEPCO-Uhde Inc. is not a related party of the Company as of December 31, 2023 as the liquidation process was completed for the year ended December 31, 2023.[9]The entire amount has been set as bad debt.

Related Parties - Summary of Lo

Related Parties - Summary of Loans and Others Arising From Related Party Transaction (Details) ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	₩ 627,214
Changes in Loans receivable transactions between related parties
Loans	(37,641)
Collection	(33,159)
Others	11,272
Ending balance	567,686
KNOC Nigerian East & West Oil Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	31,473
Changes in Loans receivable transactions between related parties
Loans	170
Collection	0
Others	510
Ending balance	32,153
KNOC Nigerian East & West Oil Co., Ltd. | Accumulated impairment [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	(10,751)
Changes in Loans receivable transactions between related parties
Loans	(12,995)
Collection	0
Others	(1,797)
Ending balance	(25,543)
Nepal Water & Energy Development Company Private Limited | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	19,914
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	(1,862)
Ending balance	18,052
Xe-Pian Xe-Namnoy Power Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	22,936
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	401
Ending balance	23,337
PT Wampu Electric Power | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	9,171
Changes in Loans receivable transactions between related parties
Loans	0
Collection	(9,613)
Others	442
Ending balance	0
Bigeum Resident Photovoltaic Power Co., Ltd. [Member] | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	11,212
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	(1,687)
Ending balance	9,525
PT. Cirebon Energi Prasarana | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	29,569
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	5,973
Ending balance	35,542
Daejung Offshore Wind Power Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	1,000
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	0
Ending balance	1,000
Bitgoel Eco Energy Co., Ltd. [Member] | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	34,790
Changes in Loans receivable transactions between related parties
Loans	0
Collection	(3,905)
Others	0
Ending balance	30,885
Saemangeum Sebit Power Plant Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	37,249
Changes in Loans receivable transactions between related parties
Loans	0
Collection	(8,279)
Others	0
Ending balance	28,970
Solaseado Solar Power Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	35,000
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	0
Ending balance	35,000
Recursos Solares PV De Mexico II, S.A. De C.V. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	8,457
Changes in Loans receivable transactions between related parties
Loans	1,944
Collection	0
Others	188
Ending balance	10,589
HORUS SOLAR, S.A. DE C.V. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	19,287
Changes in Loans receivable transactions between related parties
Loans	0
Collection	(8,552)
Others	464
Ending balance	11,199
SUNMEX RENOVABLES, S.A. DE C.V. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	16,383
Changes in Loans receivable transactions between related parties
Loans	536
Collection	0
Others	291
Ending balance	17,210
Kelar S.A | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	43,965
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	(2,980)
Ending balance	40,985
DE Energia SpA | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	7,260
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	126
Ending balance	7,386
Daehan Wind Power PSC | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	14,618
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	254
Ending balance	14,872
Bitsolar Energy Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	3,165
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	0
Ending balance	3,165
Daesan Green Energy Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	3,514
Changes in Loans receivable transactions between related parties
Loans	190
Collection	(1,293)
Others	0
Ending balance	2,411
Yangyang Wind Power Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	0
Changes in Loans receivable transactions between related parties
Loans	3,257
Collection	0
Others	0
Ending balance	3,257
Nghi Son 2 Power LLC | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	186,735
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	3,256
Ending balance	189,991
Pulau Indah Power Plant Sdn. Bhd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	10,207
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	(244)
Ending balance	9,963
Guadalupe Solar SpA | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	3,344
Changes in Loans receivable transactions between related parties
Loans	0
Collection	(225)
Others	42
Ending balance	3,161
Foresight Iberian Solar Group Holding, S.L. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	61,302
Changes in Loans receivable transactions between related parties
Loans	0
Collection	(1,292)
Others	4,308
Ending balance	64,318
Capman Lynx SCA, SICAR | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	31,628
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	3,582
Ending balance	35,210
Capman Lynx SCA, SICAR | Accumulated impairment [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	(4,467)
Changes in Loans receivable transactions between related parties
Loans	(30,743)
Collection	0
Others	0
Ending balance	(35,210)
SPower Chile SpA [Member] | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	253
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	5
Ending balance	258
KEPCO Lebanon SARL | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	3,834
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	0
Ending balance	3,834
KEPCO Lebanon SARL | Accumulated impairment [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	(3,834)
Changes in Loans receivable transactions between related parties
Loans	0
Collection	0
Others	0
Ending balance	(3,834)
Gunsan Bio Energy Co., Ltd. | Gross carrying amount [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	12,396	[1]
Changes in Loans receivable transactions between related parties
Loans	0	[1]
Collection	0	[1]
Others	0	[1]
Ending balance	12,396	[1]
Gunsan Bio Energy Co., Ltd. | Accumulated impairment [member]
Disclosure of Loans transactions between related parties [Line Items]
Beginning balance	(12,396)	[1]
Changes in Loans receivable transactions between related parties
Loans	0	[1]
Collection	0	[1]
Others	0	[1]
Ending balance	₩ (12,396)	[1]
[1]Bankruptcy was declared during the year ended December 31, 2023. The Company cannot hold significant influence due to the appointment of a bankruptcy trustee, so the Company was reclassified from an associate to financial assets at fair value through other comprehensive income.

Related Parties - Summary of Bo

Related Parties - Summary of Borrowings Arising From Related Party Transactions (Details) - Korea Development Bank ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Disclosure of Borrowings transactions between related parties [Line Items]
Beginning balance	₩ 222,497
Changes in Borrowings transactions between related parties [Abstract]
Borrowings	504,095
Repayment	(459,165)
Others	58,594
Ending balance	326,021
Facility
Disclosure of Borrowings transactions between related parties [Line Items]
Beginning balance	96,584
Changes in Borrowings transactions between related parties [Abstract]
Borrowings	0
Repayment	(12,387)
Others	906
Ending balance	85,103
Others
Disclosure of Borrowings transactions between related parties [Line Items]
Beginning balance	2,133
Changes in Borrowings transactions between related parties [Abstract]
Borrowings	0
Repayment	(375)
Others	0
Ending balance	1,758
Operating funds
Disclosure of Borrowings transactions between related parties [Line Items]
Beginning balance	62,433
Changes in Borrowings transactions between related parties [Abstract]
Borrowings	478,394
Repayment	(442,027)
Others	21,200
Ending balance	120,000
Syndicated Loans
Disclosure of Borrowings transactions between related parties [Line Items]
Beginning balance	12,455
Changes in Borrowings transactions between related parties [Abstract]
Borrowings	0
Repayment	(978)
Others	(529)
Ending balance	10,948
EBL
Disclosure of Borrowings transactions between related parties [Line Items]
Beginning balance	48,892
Changes in Borrowings transactions between related parties [Abstract]
Borrowings	25,701
Repayment	(3,398)
Others	37,017
Ending balance	₩ 108,212

Related Parties - Summary of Gu

Related Parties - Summary of Guarantees Provided To Related Parties (Details) ر.س in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)		Dec. 31, 2023 MXN ($)		Dec. 31, 2023 KRW (₩)		Dec. 31, 2023 SAR (ر.س)
Performance guarantees 1
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Shuweihat Asia Operation & Maintenance Company		Shuweihat Asia Operation & Maintenance Company		Shuweihat Asia Operation & Maintenance Company		Shuweihat Asia Operation & Maintenance Company
Amount of guarantees | $	$ 11,000
Name of Guarantee	Shuweihat Asia Power Investment B.V.		Shuweihat Asia Power Investment B.V.		Shuweihat Asia Power Investment B.V.		Shuweihat Asia Power Investment B.V.
Performance guarantees and others 1
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Rabigh Operation & Maintenance Company Limited		Rabigh Operation & Maintenance Company Limited		Rabigh Operation & Maintenance Company Limited		Rabigh Operation & Maintenance Company Limited
Amount of guarantees | $	$ 1,387
Name of Guarantee	Rabigh Electricity Company		Rabigh Electricity Company		Rabigh Electricity Company		Rabigh Electricity Company
Performance guarantees and others 2
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Nghi Son 2 Power LLC		Nghi Son 2 Power LLC		Nghi Son 2 Power LLC		Nghi Son 2 Power LLC
Amount of guarantees | $	$ 40,738
Name of Guarantee	SMBC Singapore and others		SMBC Singapore and others		SMBC Singapore and others		SMBC Singapore and others
Debt guarantees 1
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Barakah One Company		Barakah One Company		Barakah One Company		Barakah One Company
Amount of guarantees | $	$ 1,223,355
Name of Guarantee	Export-Import Bank of Korea and others		Export-Import Bank of Korea and others		Export-Import Bank of Korea and others		Export-Import Bank of Korea and others
Performance guarantees and others 3
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 4,103,269
Performance guarantees 2
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation	[1]	Korea Electric Power Corporation	[1]	Korea Electric Power Corporation	[1]	Korea Electric Power Corporation	[1]
Name of Principal obligor	RE Holiday Holdings LLC	[1]	RE Holiday Holdings LLC	[1]	RE Holiday Holdings LLC	[1]	RE Holiday Holdings LLC	[1]
Amount of guarantees | $	$ 222,077	[1]
Name of Guarantee	EFS Renewables Holdings, LLC, CA-CIB and others	[1]	EFS Renewables Holdings, LLC, CA-CIB and others	[1]	EFS Renewables Holdings, LLC, CA-CIB and others	[1]	EFS Renewables Holdings, LLC, CA-CIB and others	[1]
Performance guarantees 3
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	RE Pioneer Holdings LLC		RE Pioneer Holdings LLC		RE Pioneer Holdings LLC		RE Pioneer Holdings LLC
Amount of guarantees | $	$ 106,873
Name of Guarantee	EFS Renewables Holdings, LLC		EFS Renewables Holdings, LLC		EFS Renewables Holdings, LLC		EFS Renewables Holdings, LLC
Performance guarantees 4
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Rabigh Electricity Company		Rabigh Electricity Company		Rabigh Electricity Company		Rabigh Electricity Company
Amount of guarantees | $	$ 4,151
Name of Guarantee	Hana Bank		Hana Bank		Hana Bank		Hana Bank
Performance guarantees 5
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Shuweihat Asia Power Investment B.V.		Shuweihat Asia Power Investment B.V.		Shuweihat Asia Power Investment B.V.		Shuweihat Asia Power Investment B.V.
Amount of guarantees | $	$ 50,000
Name of Guarantee	ING Bank		ING Bank		ING Bank		ING Bank
Performance guarantees 6
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Amman Asia Electric Power Company		Amman Asia Electric Power Company		Amman Asia Electric Power Company		Amman Asia Electric Power Company
Amount of guarantees | $	$ 17,400
Name of Guarantee	Shinhan Bank		Shinhan Bank		Shinhan Bank		Shinhan Bank
Other performance guarantees 1
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Horus Solar, S.A. de C.V.		Horus Solar, S.A. de C.V.		Horus Solar, S.A. de C.V.		Horus Solar, S.A. de C.V.
Amount of guarantees | $			$ 16,413
Name of Guarantee	CENACE and others		CENACE and others		CENACE and others		CENACE and others
Other performance guarantees 2
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Recursos Solares PV de Mexico II, S.A. de C.V.		Recursos Solares PV de Mexico II, S.A. de C.V.		Recursos Solares PV de Mexico II, S.A. de C.V.		Recursos Solares PV de Mexico II, S.A. de C.V.
Amount of guarantees	$ 393		$ 1,518
Name of Guarantee	SEMARNAT / CFE Transmission		SEMARNAT / CFE Transmission		SEMARNAT / CFE Transmission		SEMARNAT / CFE Transmission
Other performance guarantees 3
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	Sunmex Renovables, S.A. de C.V.		Sunmex Renovables, S.A. de C.V.		Sunmex Renovables, S.A. de C.V.		Sunmex Renovables, S.A. de C.V.
Amount of guarantees	$ 9,078		$ 3,666
Name of Guarantee	CENACE / SEMARNAT		CENACE / SEMARNAT		CENACE / SEMARNAT		CENACE / SEMARNAT
Performance guarantees 7
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	International Offshore Power Transmission Holding Company Limited		International Offshore Power Transmission Holding Company Limited		International Offshore Power Transmission Holding Company Limited		International Offshore Power Transmission Holding Company Limited
Amount of guarantees | $	$ 52,500
Name of Guarantee	Mizuho Bank		Mizuho Bank		Mizuho Bank		Mizuho Bank
Other performance guarantees 4
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 7,000
Name of Guarantee	Credit Agricole		Credit Agricole		Credit Agricole		Credit Agricole
Collateralized money invested 1
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation	[2]	Korea Electric Power Corporation	[2]	Korea Electric Power Corporation	[2]	Korea Electric Power Corporation	[2]
Name of Principal obligor	Pulau Indah Power Plant Sdn. Bhd.	[2]	Pulau Indah Power Plant Sdn. Bhd.	[2]	Pulau Indah Power Plant Sdn. Bhd.	[2]	Pulau Indah Power Plant Sdn. Bhd.	[2]
Amount of guarantees					₩ 13,210	[2]
Name of Guarantee	Malaysian Trustee Berhad	[2]	Malaysian Trustee Berhad	[2]	Malaysian Trustee Berhad	[2]	Malaysian Trustee Berhad	[2]
Debt guarantees 2
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation		Korea Electric Power Corporation
Name of Principal obligor	KEPCO for Power Company		KEPCO for Power Company		KEPCO for Power Company		KEPCO for Power Company
Amount of guarantees | $	$ 60,000
Name of Guarantee	Riyad bank		Riyad bank		Riyad bank		Riyad bank
Other performance guarantees 5
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 70,000
Name of Guarantee	SMBC Seoul and others		SMBC Seoul and others		SMBC Seoul and others		SMBC Seoul and others
Collateralized money invested 2
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Cheongna Energy Co., Ltd.		Cheongna Energy Co., Ltd.		Cheongna Energy Co., Ltd.		Cheongna Energy Co., Ltd.
Amount of guarantees					₩ 25,549
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Guarantees for supplemental funding 1
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 3
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Xe-Pian Xe-Namnoy Power Co., Ltd.		Xe-Pian Xe-Namnoy Power Co., Ltd.		Xe-Pian Xe-Namnoy Power Co., Ltd.		Xe-Pian Xe-Namnoy Power Co., Ltd.
Amount of guarantees					₩ 116,378
Name of Guarantee	Krung Thai Bank		Krung Thai Bank		Krung Thai Bank		Krung Thai Bank
Impounding bonus guarantees
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 5,000	[4]
Name of Guarantee	SK Eco Plant Co., Ltd.	[4]	SK Eco Plant Co., Ltd.	[4]	SK Eco Plant Co., Ltd.	[4]	SK Eco Plant Co., Ltd.	[4]
Performance guarantees and others 4
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Rabigh Operation & Maintenance Company Limited		Rabigh Operation & Maintenance Company Limited		Rabigh Operation & Maintenance Company Limited		Rabigh Operation & Maintenance Company Limited
Amount of guarantees | ر.س							ر.س 11,200
Name of Guarantee	National Bank of Kuwait		National Bank of Kuwait		National Bank of Kuwait		National Bank of Kuwait
Collateralized money invested 4
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	Daegu Photovoltaic Co., Ltd.		Daegu Photovoltaic Co., Ltd.		Daegu Photovoltaic Co., Ltd.		Daegu Photovoltaic Co., Ltd.
Amount of guarantees					₩ 2,804
Name of Guarantee	Korea Development Bank		Korea Development Bank		Korea Development Bank		Korea Development Bank
Collateralized money invested 5
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.	[5]	Korea Western Power Co., Ltd.	[5]	Korea Western Power Co., Ltd.	[5]	Korea Western Power Co., Ltd.	[5]
Name of Principal obligor	Dongducheon Dream Power Co., Ltd.	[5]	Dongducheon Dream Power Co., Ltd.	[5]	Dongducheon Dream Power Co., Ltd.	[5]	Dongducheon Dream Power Co., Ltd.	[5]
Amount of guarantees					₩ 50,682	[5]
Name of Guarantee	Kookmin Bank and others	[5]	Kookmin Bank and others	[5]	Kookmin Bank and others	[5]	Kookmin Bank and others	[5]
Debt guarantees 3
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 20,300
Name of Guarantee	Hanyang Securities		Hanyang Securities		Hanyang Securities		Hanyang Securities
Collateralized money invested 6
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	PT. Mutiara Jawa		PT. Mutiara Jawa		PT. Mutiara Jawa		PT. Mutiara Jawa
Amount of guarantees					₩ 5,168
Name of Guarantee	Woori Bank		Woori Bank		Woori Bank		Woori Bank
Collateralized money invested 7
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Haeng Bok Do Si Photovoltaic Power Co., Ltd.		Haeng Bok Do Si Photovoltaic Power Co., Ltd.		Haeng Bok Do Si Photovoltaic Power Co., Ltd.		Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Amount of guarantees					₩ 294
Name of Guarantee	Nonghyup Bank		Nonghyup Bank		Nonghyup Bank		Nonghyup Bank
Collateralized money invested 8
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Shin Pyeongtaek Power Co., Ltd.		Shin Pyeongtaek Power Co., Ltd.		Shin Pyeongtaek Power Co., Ltd.		Shin Pyeongtaek Power Co., Ltd.
Amount of guarantees					₩ 145,025
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Guarantees for supplemental funding 2
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 9
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Haemodum Solar Co., Ltd.		Haemodum Solar Co., Ltd.		Haemodum Solar Co., Ltd.		Haemodum Solar Co., Ltd.
Amount of guarantees					₩ 3,122
Name of Guarantee	Nonghyup Bank		Nonghyup Bank		Nonghyup Bank		Nonghyup Bank
Collateralized money invested 10
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Muan Solar Park Co., Ltd.		Muan Solar Park Co., Ltd.		Muan Solar Park Co., Ltd.		Muan Solar Park Co., Ltd.
Amount of guarantees					₩ 6,830
Name of Guarantee	IBK and others		IBK and others		IBK and others		IBK and others
Collateralized money invested 11
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Anjwa Smart Farm & Solar City Co., Ltd.		Anjwa Smart Farm & Solar City Co., Ltd.		Anjwa Smart Farm & Solar City Co., Ltd.		Anjwa Smart Farm & Solar City Co., Ltd.
Amount of guarantees					₩ 7,665
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Collateralized money invested 12
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Seoroseoro Sunny Power Plant Co., Ltd.		Seoroseoro Sunny Power Plant Co., Ltd.		Seoroseoro Sunny Power Plant Co., Ltd.		Seoroseoro Sunny Power Plant Co., Ltd.
Amount of guarantees					₩ 941
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Collateralized money invested 13
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	YuDang Solar Co., Ltd.		YuDang Solar Co., Ltd.		YuDang Solar Co., Ltd.		YuDang Solar Co., Ltd.
Amount of guarantees					₩ 570
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 3
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 14
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Hapcheon Floating Photovoltaic Power Plant Inc.		Hapcheon Floating Photovoltaic Power Plant Inc.		Hapcheon Floating Photovoltaic Power Plant Inc.		Hapcheon Floating Photovoltaic Power Plant Inc.
Amount of guarantees					₩ 10,348
Name of Guarantee	Nonghyup Bank and others		Nonghyup Bank and others		Nonghyup Bank and others		Nonghyup Bank and others
Collateralized money invested 15
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Yeongwol Eco Wind Co., Ltd.		Yeongwol Eco Wind Co., Ltd.		Yeongwol Eco Wind Co., Ltd.		Yeongwol Eco Wind Co., Ltd.
Amount of guarantees					₩ 4,024
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 4
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 16
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.		Korea Western Power Co., Ltd.
Name of Principal obligor	Gurae Resident Power Co., Ltd.		Gurae Resident Power Co., Ltd.		Gurae Resident Power Co., Ltd.		Gurae Resident Power Co., Ltd.
Amount of guarantees					₩ 569
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 5
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 17
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	Gunsan Land Solar Co., Ltd.		Gunsan Land Solar Co., Ltd.		Gunsan Land Solar Co., Ltd.		Gunsan Land Solar Co., Ltd.
Amount of guarantees					₩ 22,429
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 6
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0
Collateralized money invested 18
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	Seobusambo highway photovoltaics Co., Ltd.		Seobusambo highway photovoltaics Co., Ltd.		Seobusambo highway photovoltaics Co., Ltd.		Seobusambo highway photovoltaics Co., Ltd.
Amount of guarantees					₩ 3,580
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 7
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 19
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	Eumseong Eco Park Co., Ltd.		Eumseong Eco Park Co., Ltd.		Eumseong Eco Park Co., Ltd.		Eumseong Eco Park Co., Ltd.
Amount of guarantees					₩ 8,386
Name of Guarantee	Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 20
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	PungBack Wind Farm Corporation		PungBack Wind Farm Corporation		PungBack Wind Farm Corporation		PungBack Wind Farm Corporation
Amount of guarantees					₩ 7,940
Name of Guarantee	Hanwha Life Insurance Co., Ltd. and others		Hanwha Life Insurance Co., Ltd. and others		Hanwha Life Insurance Co., Ltd. and others		Hanwha Life Insurance Co., Ltd. and others
Loan payment guarantee
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd		Korea Western Power Co., Ltd
Name of Principal obligor	Wadi Noor Solar Power Company SAOC		Wadi Noor Solar Power Company SAOC		Wadi Noor Solar Power Company SAOC		Wadi Noor Solar Power Company SAOC
Amount of guarantees | $	$ 54,855
Name of Guarantee	DBS Bank		DBS Bank		DBS Bank		DBS Bank
Collateralized money invested 21
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Busan Shinho Solar Power Co., Ltd.		Busan Shinho Solar Power Co., Ltd.		Busan Shinho Solar Power Co., Ltd.		Busan Shinho Solar Power Co., Ltd.
Amount of guarantees					₩ 6,669
Name of Guarantee	Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others
Collateralized money invested 22
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Seokmun Energy Co., Ltd.		Seokmun Energy Co., Ltd.		Seokmun Energy Co., Ltd.		Seokmun Energy Co., Ltd.
Amount of guarantees					₩ 16,591
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Guarantees for supplemental funding 8
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 23
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Chun-cheon Energy Co., Ltd.		Chun-cheon Energy Co., Ltd.		Chun-cheon Energy Co., Ltd.		Chun-cheon Energy Co., Ltd.
Amount of guarantees					₩ 35,083
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Guarantees for supplemental funding 9
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 90,800	[3]
Collateralized money invested 24
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Honam Wind Power Co., Ltd.		Honam Wind Power Co., Ltd.		Honam Wind Power Co., Ltd.		Honam Wind Power Co., Ltd.
Amount of guarantees					₩ 4,743
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Collateralized money invested 25
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	GS Donghae Electric Power Co., Ltd.		GS Donghae Electric Power Co., Ltd.		GS Donghae Electric Power Co., Ltd.		GS Donghae Electric Power Co., Ltd.
Amount of guarantees					₩ 259,084
Name of Guarantee	Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others
Collateralized money invested 26
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Yeonggwangbaeksu Wind Power Co., Ltd.		Yeonggwangbaeksu Wind Power Co., Ltd.		Yeonggwangbaeksu Wind Power Co., Ltd.		Yeonggwangbaeksu Wind Power Co., Ltd.
Amount of guarantees					₩ 3,443
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Collateralized money invested 27
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Yeonggwang Wind Power Co., Ltd.		Yeonggwang Wind Power Co., Ltd.		Yeonggwang Wind Power Co., Ltd.		Yeonggwang Wind Power Co., Ltd.
Amount of guarantees					₩ 23,380
Name of Guarantee	KDB Capital Corporation and others		KDB Capital Corporation and others		KDB Capital Corporation and others		KDB Capital Corporation and others
Collateralized money invested 28
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Daesan Green Energy Co., Ltd.		Daesan Green Energy Co., Ltd.		Daesan Green Energy Co., Ltd.		Daesan Green Energy Co., Ltd.
Amount of guarantees					₩ 22,191
Name of Guarantee	IBK		IBK		IBK		IBK
Guarantees for supplemental funding 10
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 29
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Taebaek Gadeoksan Wind Power Co., Ltd.		Taebaek Gadeoksan Wind Power Co., Ltd.		Taebaek Gadeoksan Wind Power Co., Ltd.		Taebaek Gadeoksan Wind Power Co., Ltd.
Amount of guarantees					₩ 19,426
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Other guarantees 1
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	PT. Tanjung Power Indonesia		PT. Tanjung Power Indonesia		PT. Tanjung Power Indonesia		PT. Tanjung Power Indonesia
Amount of guarantees | $	$ 3,150
Name of Guarantee	PT. Adaro Indonesia		PT. Adaro Indonesia		PT. Adaro Indonesia		PT. Adaro Indonesia
Guarantees for supplemental funding 11
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Name of Guarantee	Sumitomo mitsui banking and others	[3]	Sumitomo mitsui banking and others	[3]	Sumitomo mitsui banking and others	[3]	Sumitomo mitsui banking and others	[3]
Collateralized money invested 30
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 90,151
Name of Guarantee	MUFG and others		MUFG and others		MUFG and others		MUFG and others
Performance guarantees 8
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.	[6]	Korea East-West Power Co., Ltd.	[6]	Korea East-West Power Co., Ltd.	[6]	Korea East-West Power Co., Ltd.	[6]
Name of Principal obligor	South Jamaica Power Company Limited	[6]	South Jamaica Power Company Limited	[6]	South Jamaica Power Company Limited	[6]	South Jamaica Power Company Limited	[6]
Amount of guarantees | $	$ 14,400	[6]
Name of Guarantee	Hana Bank	[6]	Hana Bank	[6]	Hana Bank	[6]	Hana Bank	[6]
Collateralized money invested 31
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 43,109
Name of Guarantee	JCSD Trustee Services Limited and others		JCSD Trustee Services Limited and others		JCSD Trustee Services Limited and others		JCSD Trustee Services Limited and others
Collateralized money invested 32
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	DE Energia SpA		DE Energia SpA		DE Energia SpA		DE Energia SpA
Amount of guarantees					₩ 9,703
Name of Guarantee	Mirae Asset Securities Co., Ltd. and others		Mirae Asset Securities Co., Ltd. and others		Mirae Asset Securities Co., Ltd. and others		Mirae Asset Securities Co., Ltd. and others
Collateralized loans
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 5,728
Payment guarantees
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 959	[7]
Name of Guarantee	Hana Bank	[7]	Hana Bank	[7]	Hana Bank	[7]	Hana Bank	[7]
Collateralized money invested 33
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Bitsolar Energy Co., Ltd.		Bitsolar Energy Co., Ltd.		Bitsolar Energy Co., Ltd.		Bitsolar Energy Co., Ltd.
Amount of guarantees					₩ 352
Name of Guarantee	Mirae Asset Life Insurance Co., Ltd. and others		Mirae Asset Life Insurance Co., Ltd. and others		Mirae Asset Life Insurance Co., Ltd. and others		Mirae Asset Life Insurance Co., Ltd. and others
Collateralized money invested 34
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Cheongju Eco Park Co., Ltd.		Cheongju Eco Park Co., Ltd.		Cheongju Eco Park Co., Ltd.		Cheongju Eco Park Co., Ltd.
Amount of guarantees					₩ 9,072
Name of Guarantee	Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 35
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Busan Industrial Solar Power Co., Ltd.		Busan Industrial Solar Power Co., Ltd.		Busan Industrial Solar Power Co., Ltd.		Busan Industrial Solar Power Co., Ltd.
Amount of guarantees					₩ 1,058
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Collateralized money invested 36
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Yangyang Wind Power Co., Ltd.		Yangyang Wind Power Co., Ltd.		Yangyang Wind Power Co., Ltd.		Yangyang Wind Power Co., Ltd.
Amount of guarantees					₩ 10,435
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 12
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 37
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)		KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)		KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)		KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)
Amount of guarantees					₩ 7,779
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Collateralized money invested 38
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Goheung New Energy Co., Ltd.		Goheung New Energy Co., Ltd.		Goheung New Energy Co., Ltd.		Goheung New Energy Co., Ltd.
Amount of guarantees					₩ 4,808
Name of Guarantee	Woori Bank and others		Woori Bank and others		Woori Bank and others		Woori Bank and others
Collateralized money invested 39
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Seungmun Green Energy		Seungmun Green Energy		Seungmun Green Energy		Seungmun Green Energy
Amount of guarantees					₩ 9,757
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 13
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 40
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Yanggu Floating Photovoltaic Power Plant Inc.		Yanggu Floating Photovoltaic Power Plant Inc.		Yanggu Floating Photovoltaic Power Plant Inc.		Yanggu Floating Photovoltaic Power Plant Inc.
Amount of guarantees					₩ 760
Name of Guarantee	Korea Development Bank		Korea Development Bank		Korea Development Bank		Korea Development Bank
Collateralized money invested 41
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.		Korea East-West Power Co., Ltd.
Name of Principal obligor	Hoenggye Renewable Energy Co., Ltd.		Hoenggye Renewable Energy Co., Ltd.		Hoenggye Renewable Energy Co., Ltd.		Hoenggye Renewable Energy Co., Ltd.
Amount of guarantees					₩ 2,375
Name of Guarantee	IBK		IBK		IBK		IBK
Guarantees for supplemental funding 14
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 42
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	KNH Solar Co., Ltd.		KNH Solar Co., Ltd.		KNH Solar Co., Ltd.		KNH Solar Co., Ltd.
Amount of guarantees					₩ 3,194
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Performance guarantees and guarantees for supplemental funding
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 43
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Daeryun Power Co., Ltd.		Daeryun Power Co., Ltd.		Daeryun Power Co., Ltd.		Daeryun Power Co., Ltd.
Amount of guarantees					₩ 26,834
Name of Guarantee	Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others
Collateralized money invested 44
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Daegu Green Power Co., Ltd.		Daegu Green Power Co., Ltd.		Daegu Green Power Co., Ltd.		Daegu Green Power Co., Ltd.
Amount of guarantees					₩ 26,430
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Performance guarantees 9
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Performance guarantees 10
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Kelar S.A.		Kelar S.A.		Kelar S.A.		Kelar S.A.
Amount of guarantees | $	$ 33,930
Name of Guarantee	Hana Bank, MUFG		Hana Bank, MUFG		Hana Bank, MUFG		Hana Bank, MUFG
Payment guarantees 1
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 11,707	[8]
Name of Guarantee	Hana Bank	[8]	Hana Bank	[8]	Hana Bank	[8]	Hana Bank	[8]
Performance guarantees 11
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Daehan Wind Power PSC		Daehan Wind Power PSC		Daehan Wind Power PSC		Daehan Wind Power PSC
Amount of guarantees | $	$ 1,800
Name of Guarantee	Shinhan Bank		Shinhan Bank		Shinhan Bank		Shinhan Bank
Payment guarantees 2
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees | $	$ 2,000	[9]
Name of Guarantee	Hana Bank	[9]	Hana Bank	[9]	Hana Bank	[9]	Hana Bank	[9]
Collateralized money invested 45
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 16,426
Name of Guarantee	Standard Chartered		Standard Chartered		Standard Chartered		Standard Chartered
Collateralized money invested 46
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Pyeongchang Wind Power Co., Ltd.		Pyeongchang Wind Power Co., Ltd.		Pyeongchang Wind Power Co., Ltd.		Pyeongchang Wind Power Co., Ltd.
Amount of guarantees					₩ 12,228
Name of Guarantee	Woori Bank, Shinhan Bank and others		Woori Bank, Shinhan Bank and others		Woori Bank, Shinhan Bank and others		Woori Bank, Shinhan Bank and others
Performance guarantees 12
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0
Collateralized money invested 47
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Taebaek Guinemi Wind Power Co., Ltd		Taebaek Guinemi Wind Power Co., Ltd		Taebaek Guinemi Wind Power Co., Ltd		Taebaek Guinemi Wind Power Co., Ltd
Amount of guarantees					₩ 13,530
Name of Guarantee	IBK		IBK		IBK		IBK
Payment guarantees 3
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.	[10]	Korea Southern Power Co., Ltd.	[10]	Korea Southern Power Co., Ltd.	[10]	Korea Southern Power Co., Ltd.	[10]
Name of Principal obligor	Samcheok Eco Materials Co., Ltd.	[10]	Samcheok Eco Materials Co., Ltd.	[10]	Samcheok Eco Materials Co., Ltd.	[10]	Samcheok Eco Materials Co., Ltd.	[10]
Amount of guarantees					₩ 0	[10]
Name of Guarantee	SEM Investment Co., Ltd.	[10]	SEM Investment Co., Ltd.	[10]	SEM Investment Co., Ltd.	[10]	SEM Investment Co., Ltd.	[10]
Performance guarantees 13
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[11]
Collateralized money invested 48
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Solaseado Solar Power Co., Ltd		Solaseado Solar Power Co., Ltd		Solaseado Solar Power Co., Ltd		Solaseado Solar Power Co., Ltd
Amount of guarantees					₩ 13,370
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Collateralized money invested 49
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.	[12]	Korea Southern Power Co., Ltd.	[12]	Korea Southern Power Co., Ltd.	[12]	Korea Southern Power Co., Ltd.	[12]
Name of Principal obligor	Naepo Green Energy Co., Ltd.	[12]	Naepo Green Energy Co., Ltd.	[12]	Naepo Green Energy Co., Ltd.	[12]	Naepo Green Energy Co., Ltd.	[12]
Amount of guarantees					₩ 5,285	[12]
Name of Guarantee	IBK and others	[12]	IBK and others	[12]	IBK and others	[12]	IBK and others	[12]
Performance Guarantees And Guarantees For Supplemental Funding 1 [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 30,000	[3]
Collateralized money invested 50
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd		Korea Southern Power Co., Ltd		Korea Southern Power Co., Ltd		Korea Southern Power Co., Ltd
Name of Principal obligor	Omisan Wind Power Co., Ltd.		Omisan Wind Power Co., Ltd.		Omisan Wind Power Co., Ltd.		Omisan Wind Power Co., Ltd.
Amount of guarantees					₩ 10,229
Name of Guarantee	Shinhan Bank		Shinhan Bank		Shinhan Bank		Shinhan Bank
Performance guarantees and guarantees for supplemental funding 2 [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 51
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Geumsungsan Wind Power Co., Ltd.		Geumsungsan Wind Power Co., Ltd.		Geumsungsan Wind Power Co., Ltd.		Geumsungsan Wind Power Co., Ltd.
Amount of guarantees					₩ 5,515
Name of Guarantee	Kookmin Bank		Kookmin Bank		Kookmin Bank		Kookmin Bank
Collateralized money invested 52
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	HORANG ENERGY Inc.		HORANG ENERGY Inc.		HORANG ENERGY Inc.		HORANG ENERGY Inc.
Amount of guarantees					₩ 4,149
Name of Guarantee	Woori Bank and others		Woori Bank and others		Woori Bank and others		Woori Bank and others
Guarantees for supplemental funding 16
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 53
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Haman Green Energy Co., Ltd.		Haman Green Energy Co., Ltd.		Haman Green Energy Co., Ltd.		Haman Green Energy Co., Ltd.
Amount of guarantees					₩ 2,981
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Guarantees for supplemental funding 17
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 54
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.		Korea Southern Power Co., Ltd.
Name of Principal obligor	Jeongeup Green Power Co., Ltd.		Jeongeup Green Power Co., Ltd.		Jeongeup Green Power Co., Ltd.		Jeongeup Green Power Co., Ltd.
Amount of guarantees					₩ 1,560
Name of Guarantee	Woori Bank and others		Woori Bank and others		Woori Bank and others		Woori Bank and others
Guarantees for supplemental funding 18
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Payment guarantees 4
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Power Services Ltda.		KOSPO Power Services Ltda.		KOSPO Power Services Ltda.		KOSPO Power Services Ltda.
Name of Principal obligor	Kelar S.A.		Kelar S.A.		Kelar S.A.		Kelar S.A.
Amount of guarantees | $	$ 1,316
Name of Guarantee	Scotia bank		Scotia bank		Scotia bank		Scotia bank
Collateralized money invested 55
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA
Name of Principal obligor	Kelar S.A.		Kelar S.A.		Kelar S.A.		Kelar S.A.
Amount of guarantees					₩ 131,529
Name of Guarantee	Export-Import Bank of Korea and others		Export-Import Bank of Korea and others		Export-Import Bank of Korea and others		Export-Import Bank of Korea and others
Collateralized money invested 56
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA
Name of Principal obligor	Chester Solar I SpA		Chester Solar I SpA		Chester Solar I SpA		Chester Solar I SpA
Amount of guarantees					₩ 1,238
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 57
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA
Name of Principal obligor	Chester Solar IV SpA		Chester Solar IV SpA		Chester Solar IV SpA		Chester Solar IV SpA
Amount of guarantees					₩ 484
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 58
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA
Name of Principal obligor	Chester Solar V SpA		Chester Solar V SpA		Chester Solar V SpA		Chester Solar V SpA
Amount of guarantees					₩ 191
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 59
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA
Name of Principal obligor	Diego de Almagro Solar SpA		Diego de Almagro Solar SpA		Diego de Almagro Solar SpA		Diego de Almagro Solar SpA
Amount of guarantees					₩ 954
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 60
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA		KOSPO Chile SpA
Name of Principal obligor	Laurel SpA		Laurel SpA		Laurel SpA		Laurel SpA
Amount of guarantees					₩ 613
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 61
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd		Korea Midland Power Co., Ltd		Korea Midland Power Co., Ltd		Korea Midland Power Co., Ltd
Name of Principal obligor	YeongGwang Yaksu Wind Electric Co., Ltd.		YeongGwang Yaksu Wind Electric Co., Ltd.		YeongGwang Yaksu Wind Electric Co., Ltd.		YeongGwang Yaksu Wind Electric Co., Ltd.
Amount of guarantees					₩ 133
Name of Guarantee	IBK and others		IBK and others		IBK and others		IBK and others
Collateralized money invested 62
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Hyundai Green Power Co., Ltd.		Hyundai Green Power Co., Ltd.		Hyundai Green Power Co., Ltd.		Hyundai Green Power Co., Ltd.
Amount of guarantees					₩ 118,172
Name of Guarantee	Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others
Debt guarantees 5
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	PT Wampu Electric Power		PT Wampu Electric Power		PT Wampu Electric Power		PT Wampu Electric Power
Amount of guarantees | $	$ 5,473
Name of Guarantee	PT. Bank KB Bukopin		PT. Bank KB Bukopin		PT. Bank KB Bukopin		PT. Bank KB Bukopin
Debt guarantees 4
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	PT. Cirebon Electric Power		PT. Cirebon Electric Power		PT. Cirebon Electric Power		PT. Cirebon Electric Power
Amount of guarantees | $	$ 3,355
Name of Guarantee	Mizuho Bank		Mizuho Bank		Mizuho Bank		Mizuho Bank
Guarantees for supplemental funding 19
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Name of Guarantee	IBK and others	[3]	IBK and others	[3]	IBK and others	[3]	IBK and others	[3]
Collateralized money invested 63
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Green Energy Electricity Generation Co., Ltd.		Green Energy Electricity Generation Co., Ltd.		Green Energy Electricity Generation Co., Ltd.		Green Energy Electricity Generation Co., Ltd.
Amount of guarantees					₩ 8
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 64
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Yaksu ESS Co., Ltd.		Yaksu ESS Co., Ltd.		Yaksu ESS Co., Ltd.		Yaksu ESS Co., Ltd.
Amount of guarantees					₩ 285
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 65
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd		Korea Midland Power Co., Ltd		Korea Midland Power Co., Ltd		Korea Midland Power Co., Ltd
Name of Principal obligor	Gwangbaek Solar Power Investment Co., Ltd.		Gwangbaek Solar Power Investment Co., Ltd.		Gwangbaek Solar Power Investment Co., Ltd.		Gwangbaek Solar Power Investment Co., Ltd.
Amount of guarantees					₩ 5,155
Name of Guarantee	Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 66
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Muan Sunshine Solar Power Plant Co., Ltd.		Muan Sunshine Solar Power Plant Co., Ltd.		Muan Sunshine Solar Power Plant Co., Ltd.		Muan Sunshine Solar Power Plant Co., Ltd.
Amount of guarantees					₩ 2,822
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 67
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Goesan Solar park Co., Ltd.		Goesan Solar park Co., Ltd.		Goesan Solar park Co., Ltd.		Goesan Solar park Co., Ltd.
Amount of guarantees					₩ 2,877
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 68
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Bitgoel Eco Energy Co., Ltd.		Bitgoel Eco Energy Co., Ltd.		Bitgoel Eco Energy Co., Ltd.		Bitgoel Eco Energy Co., Ltd.
Amount of guarantees					₩ 7,328
Name of Guarantee	IBK and others		IBK and others		IBK and others		IBK and others
Guarantees for supplemental funding 20
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 69
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Energyco Co., Ltd.		Energyco Co., Ltd.		Energyco Co., Ltd.		Energyco Co., Ltd.
Amount of guarantees					₩ 2,140
Name of Guarantee	Nonghyup Bank		Nonghyup Bank		Nonghyup Bank		Nonghyup Bank
Payment Guarantees 5
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 2,700
Name of Guarantee	Shinhan bank		Shinhan bank		Shinhan bank		Shinhan bank
Collateralized money invested 70
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Jeju Gimnyeong Wind Power Co., Ltd.		Jeju Gimnyeong Wind Power Co., Ltd.		Jeju Gimnyeong Wind Power Co., Ltd.		Jeju Gimnyeong Wind Power Co., Ltd.
Amount of guarantees					₩ 246
Name of Guarantee	Nonghyup Bank		Nonghyup Bank		Nonghyup Bank		Nonghyup Bank
Collateralized money invested 71
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Dongbu Highway Solar Co., Ltd.		Dongbu Highway Solar Co., Ltd.		Dongbu Highway Solar Co., Ltd.		Dongbu Highway Solar Co., Ltd.
Amount of guarantees					₩ 380
Name of Guarantee	Shinhan Bank		Shinhan Bank		Shinhan Bank		Shinhan Bank
Collateralized money invested 72
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Seobu Highway Solar Co., Ltd.		Seobu Highway Solar Co., Ltd.		Seobu Highway Solar Co., Ltd.		Seobu Highway Solar Co., Ltd.
Amount of guarantees					₩ 406
Name of Guarantee	Shinhan Bank		Shinhan Bank		Shinhan Bank		Shinhan Bank
Collateralized money invested 73
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Yeongyang Wind Power Corporation II		Yeongyang Wind Power Corporation II		Yeongyang Wind Power Corporation II		Yeongyang Wind Power Corporation II
Amount of guarantees					₩ 10,100
Name of Guarantee	Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others		Korea Development Bank and others
Collateralized money invested 74
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Haeparang Energy Co., Ltd.		Haeparang Energy Co., Ltd.		Haeparang Energy Co., Ltd.		Haeparang Energy Co., Ltd.
Amount of guarantees					₩ 2,104
Name of Guarantee	Templeton hana asset management Co. Ltd.		Templeton hana asset management Co. Ltd.		Templeton hana asset management Co. Ltd.		Templeton hana asset management Co. Ltd.
Guarantees for supplemental funding 21
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 75
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Saemangeum Sebit Power Plant Co., Ltd.		Saemangeum Sebit Power Plant Co., Ltd.		Saemangeum Sebit Power Plant Co., Ltd.		Saemangeum Sebit Power Plant Co., Ltd.
Amount of guarantees					₩ 27,762
Name of Guarantee	IBK and others		IBK and others		IBK and others		IBK and others
Guarantees for supplemental funding 22
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Saemangeum Sebit Power Plant Co., Ltd.		Saemangeum Sebit Power Plant Co., Ltd.		Saemangeum Sebit Power Plant Co., Ltd.		Saemangeum Sebit Power Plant Co., Ltd.
Amount of guarantees					₩ 0	[3]
Collateralized money invested 76
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.		Korea Midland Power Co., Ltd.
Name of Principal obligor	Yeomsubong Wind Power Co., Ltd.		Yeomsubong Wind Power Co., Ltd.		Yeomsubong Wind Power Co., Ltd.		Yeomsubong Wind Power Co., Ltd.
Amount of guarantees					₩ 871
Name of Guarantee	Korea Development Bank		Korea Development Bank		Korea Development Bank		Korea Development Bank
Guarantees for supplemental funding 23
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 77
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)		Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)		Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)		Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Amount of guarantees					₩ 0	[13]
Name of Guarantee	IBK	[13]	IBK	[13]	IBK	[13]	IBK	[13]
Guarantees for supplemental funding and others 1
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 76,800	[3],[14]
Name of Guarantee	NH investment & securities Co., Ltd. and others	[3],[14]	NH investment & securities Co., Ltd. and others	[3],[14]	NH investment & securities Co., Ltd. and others	[3],[14]	NH investment & securities Co., Ltd. and others	[3],[14]
Collateralized money invested 78
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	RES Technology AD		RES Technology AD		RES Technology AD		RES Technology AD
Amount of guarantees					₩ 14,383
Name of Guarantee	UniCredit Bulbank and others		UniCredit Bulbank and others		UniCredit Bulbank and others		UniCredit Bulbank and others
Collateralized money invested 79
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	ASM-BG Investicii AD		ASM-BG Investicii AD		ASM-BG Investicii AD		ASM-BG Investicii AD
Amount of guarantees					₩ 14,739
Name of Guarantee	UniCredit Bulbank and others		UniCredit Bulbank and others		UniCredit Bulbank and others		UniCredit Bulbank and others
Collateralized money invested 80
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Expressway Solar-light Power Generation Co., Ltd.		Expressway Solar-light Power Generation Co., Ltd.		Expressway Solar-light Power Generation Co., Ltd.		Expressway Solar-light Power Generation Co., Ltd.
Amount of guarantees					₩ 5,187	[3]
Name of Guarantee	Woori Bank	[3]	Woori Bank	[3]	Woori Bank	[3]	Woori Bank	[3]
Collateralized money invested 81
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Goseong Green Power Co., Ltd.		Goseong Green Power Co., Ltd.		Goseong Green Power Co., Ltd.		Goseong Green Power Co., Ltd.
Amount of guarantees					₩ 287,624
Name of Guarantee	Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 82
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Gangneung Eco Power Co., Ltd.		Gangneung Eco Power Co., Ltd.		Gangneung Eco Power Co., Ltd.		Gangneung Eco Power Co., Ltd.
Amount of guarantees					₩ 254,929
Name of Guarantee	Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others		Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 83
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	PND Solar Co., Ltd.		PND Solar Co., Ltd.		PND Solar Co., Ltd.		PND Solar Co., Ltd.
Amount of guarantees					₩ 1,510
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 84
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Hyundai Eco Energy Co., Ltd.		Hyundai Eco Energy Co., Ltd.		Hyundai Eco Energy Co., Ltd.		Hyundai Eco Energy Co., Ltd.
Amount of guarantees					₩ 7,947
Name of Guarantee	Samsung Life Insurance and others		Samsung Life Insurance and others		Samsung Life Insurance and others		Samsung Life Insurance and others
Collateralized money invested 85
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Jaeun Resident Wind Power Plant Co., Ltd.		Jaeun Resident Wind Power Plant Co., Ltd.		Jaeun Resident Wind Power Plant Co., Ltd.		Jaeun Resident Wind Power Plant Co., Ltd.
Amount of guarantees					₩ 2,214
Name of Guarantee	IBK		IBK		IBK		IBK
Collateralized money invested 86
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Chungsongmeon BongSan wind power Co., Ltd.		Chungsongmeon BongSan wind power Co., Ltd.		Chungsongmeon BongSan wind power Co., Ltd.		Chungsongmeon BongSan wind power Co., Ltd.
Amount of guarantees					₩ 2,665
Name of Guarantee	Kyobo Life Insurance Co.,Ltd. and others		Kyobo Life Insurance Co.,Ltd. and others		Kyobo Life Insurance Co.,Ltd. and others		Kyobo Life Insurance Co.,Ltd. and others
Collateralized money invested 87
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Yeongam Solar Power Co., Ltd.		Yeongam Solar Power Co., Ltd.		Yeongam Solar Power Co., Ltd.		Yeongam Solar Power Co., Ltd.
Amount of guarantees					₩ 9,637
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Collateralized money invested 88
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Samsu Wind Power Co., Ltd.		Samsu Wind Power Co., Ltd.		Samsu Wind Power Co., Ltd.		Samsu Wind Power Co., Ltd.
Amount of guarantees					₩ 3,022
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Collateralized money invested 89
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Saemangeum Heemang Photovoltaic Co., Ltd.		Saemangeum Heemang Photovoltaic Co., Ltd.		Saemangeum Heemang Photovoltaic Co., Ltd.		Saemangeum Heemang Photovoltaic Co., Ltd.
Amount of guarantees					₩ 14,420
Name of Guarantee	Woori Bank and others		Woori Bank and others		Woori Bank and others		Woori Bank and others
Collateralized money invested 90
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.		Korea South-East Power Co., Ltd.
Name of Principal obligor	Nepal Water & Energy		Nepal Water & Energy		Nepal Water & Energy		Nepal Water & Energy
Amount of guarantees | $	$ 97,105
Name of Guarantee	International Finance		International Finance		International Finance		International Finance
Business reserve payment guarantee
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Principal obligor	Development Company Private Limited		Development Company Private Limited		Development Company Private Limited		Development Company Private Limited
Amount of guarantees | $	$ 33,333
Name of Guarantee	Corporation and others		Corporation and others		Corporation and others		Corporation and others
Collateralized money invested 91
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Noeul Green Energy Co., Ltd.		Noeul Green Energy Co., Ltd.		Noeul Green Energy Co., Ltd.		Noeul Green Energy Co., Ltd.
Amount of guarantees					₩ 0
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Collateralized money invested 92
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd		Korea Hydro & Nuclear Power Co., Ltd		Korea Hydro & Nuclear Power Co., Ltd		Korea Hydro & Nuclear Power Co., Ltd
Name of Principal obligor	Busan Green Energy Co., Ltd.		Busan Green Energy Co., Ltd.		Busan Green Energy Co., Ltd.		Busan Green Energy Co., Ltd.
Amount of guarantees					₩ 3,260
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Guarantees for Supplemental Funding 24
Disclosure of Guarantees provided between the related parties [Line Items]
Amount of guarantees					₩ 0	[3]
Collateralized money invested 93
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Go deok Clean Energy Co., Ltd.		Go deok Clean Energy Co., Ltd.		Go deok Clean Energy Co., Ltd.		Go deok Clean Energy Co., Ltd.
Amount of guarantees					₩ 4,722
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Collateralized money invested 94
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Cheong-Song Noraesan Wind Power Co., Ltd.		Cheong-Song Noraesan Wind Power Co., Ltd.		Cheong-Song Noraesan Wind Power Co., Ltd.		Cheong-Song Noraesan Wind Power Co., Ltd.
Amount of guarantees					₩ 3,755
Name of Guarantee	Woori Bank and others		Woori Bank and others		Woori Bank and others		Woori Bank and others
Collateralized money invested 95
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Gwangyang Green Energy Co., Ltd.		Gwangyang Green Energy Co., Ltd.		Gwangyang Green Energy Co., Ltd.		Gwangyang Green Energy Co., Ltd.
Amount of guarantees					₩ 24,638
Name of Guarantee	Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others		Shinhan Bank and others
Collateralized money invested 96
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Gangneung Sacheon Fuel Cell Co., Ltd.		Gangneung Sacheon Fuel Cell Co., Ltd.		Gangneung Sacheon Fuel Cell Co., Ltd.		Gangneung Sacheon Fuel Cell Co., Ltd.
Amount of guarantees					₩ 7,869
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Collateralized money invested 97
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd		Korea Hydro & Nuclear Power Co., Ltd		Korea Hydro & Nuclear Power Co., Ltd		Korea Hydro & Nuclear Power Co., Ltd
Name of Principal obligor	Chuncheon Green Energy Co., Ltd.		Chuncheon Green Energy Co., Ltd.		Chuncheon Green Energy Co., Ltd.		Chuncheon Green Energy Co., Ltd.
Amount of guarantees					₩ 8,901
Name of Guarantee	Hana Bank and others		Hana Bank and others		Hana Bank and others		Hana Bank and others
Collateralized money invested 98
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Yangyang Suri Wind Power Co., Ltd.		Yangyang Suri Wind Power Co., Ltd.		Yangyang Suri Wind Power Co., Ltd.		Yangyang Suri Wind Power Co., Ltd.
Amount of guarantees					₩ 9,608
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Collateralized money invested 99
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Bigeum Resident Photovoltaic Power Co., Ltd.		Bigeum Resident Photovoltaic Power Co., Ltd.		Bigeum Resident Photovoltaic Power Co., Ltd.		Bigeum Resident Photovoltaic Power Co., Ltd.
Amount of guarantees					₩ 0
Name of Guarantee	Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others		Kookmin Bank and others
Collateralized money invested 100
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Songsan Green Energy Co., Ltd.		Songsan Green Energy Co., Ltd.		Songsan Green Energy Co., Ltd.		Songsan Green Energy Co., Ltd.
Amount of guarantees					₩ 8,323
Name of Guarantee	Hana Bank		Hana Bank		Hana Bank		Hana Bank
Collateralized Money Invested 101 [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.		Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor	Changwon Nu-ri Energy Co., Ltd.		Changwon Nu-ri Energy Co., Ltd.		Changwon Nu-ri Energy Co., Ltd.		Changwon Nu-ri Energy Co., Ltd.
Amount of guarantees					₩ 8,026
Name of Guarantee	Hana Bank		Hana Bank		Hana Bank		Hana Bank
Payment Guarantees 6
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.	[3],[15]	Korea Hydro & Nuclear Power Co., Ltd.	[3],[15]	Korea Hydro & Nuclear Power Co., Ltd.	[3],[15]	Korea Hydro & Nuclear Power Co., Ltd.	[3],[15]
Name of Principal obligor	KAS INVESTMENT I LLC	[3],[15]	KAS INVESTMENT I LLC	[3],[15]	KAS INVESTMENT I LLC	[3],[15]	KAS INVESTMENT I LLC	[3],[15]
Amount of guarantees | $	$ 9,770	[3],[15]
Name of Guarantee	WOORI AMERICA BANK	[3],[15]	WOORI AMERICA BANK	[3],[15]	WOORI AMERICA BANK	[3],[15]	WOORI AMERICA BANK	[3],[15]
Payment guarantees 7
Disclosure of Guarantees provided between the related parties [Line Items]
Name of Primary guarantor	Korea Hydro & Nuclear Power Co., Ltd.	[15]	Korea Hydro & Nuclear Power Co., Ltd.	[15]	Korea Hydro & Nuclear Power Co., Ltd.	[15]	Korea Hydro & Nuclear Power Co., Ltd.	[15]
Name of Principal obligor	KAS INVESTMENT II LLC	[15]	KAS INVESTMENT II LLC	[15]	KAS INVESTMENT II LLC	[15]	KAS INVESTMENT II LLC	[15]
Amount of guarantees | $	$ 9,730	[15]
Name of Guarantee	WOORI AMERICA BANK	[15]	WOORI AMERICA BANK	[15]	WOORI AMERICA BANK	[15]	WOORI AMERICA BANK	[15]
[1]The credit limits of guarantees to RE Holiday Holdings LLC include the credit limits of guarantees to their subsidiaries[2]The Company, together with other shareholders, has provided a guarantee for the project financing of Pulau Indah Power Plant Sdn. Bhd., by establishing the right of pledge on the shares of Pulau Indah Power Plant Sdn. Bhd.[3]The Company guarantees to provide supplemental funding for business with respect to excessive business expenses or insufficient repayment of borrowings.[4]Xe-Pian Xe-Namnoy Power Co., Ltd., an associate of the Company, has entered a contract to pay an incentive type of impounding bonus to SK Eco Plant Co., Ltd. when the Xe-Pian Xe-Na-mnoy Dam is completed. If Xe-Pian Xe-Namnoy Power Co., Ltd. fails to pay SK Eco Plant Co., Ltd., the Company guarantees the payment, and the amount is USD 5,000,000.[5]The common stocks of Dongducheon Dream Power Co., Ltd. held by the Company were pledged as collateral.[6]This is an L/C opening guarantee for the performance of each contract in relation to the power sales contract and gas supply contract of South Jamaica Power Company Limited, a joint venture of the Company.[7]This includes a guarantee related to L/C for debt repayment allowance provided to DE Energia SpA, a joint venture of the Company.[8]The Company provided a payment guarantee to Chile Kelar project for opening L/C for Debt Service Reserve Account (DSRA), and others.[9]The Company provided a payment guarantee to Jordan Tafila wind power project for opening L/C for Debt Service Reserve Account (DSRA).[10]Samcheok Eco Materials Co., Ltd., an associate of the Company has issued the hybrid bonds. If the bonds are not repaid by December 8, 2026, the parent company and shareholders except the parent company must purchase the bonds from the acquirer. As of December 31, 2023, derivative liabilities of W18,752,903,155 were recognized in relation to this obligation.[11]The Company has entered into an agreement to settle and pay the estimated loss amount in case damages occur in relation to the fulfillment of the mandatory supply volume according to the mandatory supply agreement for coal ash.[12]The Company recognized an impairment loss on all of the equity securities of Naepo Green Energy Co., Ltd. before the prior year, and the acquisition cost of the securities provided as collateral is ￦29,200 million.[13]The Company recognized an impairment loss on all of the equity securities of Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) before the prior year, and the acquisition cost of the securities provided as collateral is ￦47,067 million.[14]Pursuant to the guarantee agreement, the Company recognized other provisions of ￦8,418 million as the possibility of economic benefit outflow to fulfill the obligation was deemed probable and the amount could be reasonably estimated.[15]The credit limits of guarantees to KAS INVESTMENT I LLC, KAS INVESTMENT II LLC include the credit limits of guarantees to their subsidiaries.

Related Parties - Summary of _2

Related Parties - Summary of Guarantees Provided To Related Parties (Parentheticals) (Details) - 12 months ended Dec. 31, 2023 $ in Thousands, ₩ in Millions	KRW (₩)	USD ($)
KEPXe Pian Xe Namnoy Power [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Provision of guarantees or collateral by entity | $		$ 5,000
Derivative liabilities [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Provision of guarantees or collateral by entity	₩ 18,753
Acquisition cost of the securities [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Provision of guarantees or collateral by entity	47,067
Other provisions [member]
Disclosure of Guarantees provided between the related parties [Line Items]
Provision of guarantees or collateral by entity	8,418
Impairment loss [Member] | Naepo Green Energy Co., Ltd [Member]
Disclosure of Guarantees provided between the related parties [Line Items]
Provision of guarantees or collateral by entity	₩ 29,200

Related Parties - Summary of _3

Related Parties - Summary of Guarantees Received from Related Parties (Details) - Kapes Inc [Member] ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Defect Guarantees [Member]
Disclosure In Tabular Form Of Guarantees Provided To Related Parties [Line Items]
Credit limit	₩ 17,558
Performance Guarantees [Member]
Disclosure In Tabular Form Of Guarantees Provided To Related Parties [Line Items]
Credit limit	6,229
Advance Payment Guarantee [Member]
Disclosure In Tabular Form Of Guarantees Provided To Related Parties [Line Items]
Credit limit	₩ 135,598

Related Parties - Summary of De

Related Parties - Summary of Derivatives Transactions With Related Parties (Details) - 12 months ended Dec. 31, 2023 - Korea Development Bank SFr in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions	KRW (₩)	USD ($)	HKD ($)	CHF (SFr)
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2019~2024	2019~2024	2019~2024	2019~2024
Pay, Contract Amount	₩ 177,600
Receive, Contract Amount | $		$ 150,000
Contract Interest rate Pay	1.24	1.24	1.24	1.24
Contract Interest rate Receive	2.50	2.50	2.50	2.50
Contract exchange rate	1,184	1,184	1,184	1,184
Cross Currency Forward Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Pay, Contract Amount	₩ 10,383
Receive, Contract Amount | $		$ 8,000
Contract exchange rate	1,297.9	1,297.9	1,297.9	1,297.9
Contract date	Dec. 20, 2023	Dec. 20, 2023	Dec. 20, 2023	Dec. 20, 2023
Matrurity date	Jan. 15, 2024	Jan. 15, 2024	Jan. 15, 2024	Jan. 15, 2024
Cross Currency Forward Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Pay, Contract Amount	₩ 14,303
Receive, Contract Amount | $		$ 11,000
Contract exchange rate	1,300.3	1,300.3	1,300.3	1,300.3
Contract date	Dec. 01, 2023	Dec. 01, 2023	Dec. 01, 2023	Dec. 01, 2023
Matrurity date	Jan. 15, 2024	Jan. 15, 2024	Jan. 15, 2024	Jan. 15, 2024
Cross Currency Forward Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Pay, Contract Amount	₩ 11,617
Receive, Contract Amount | $		$ 9,000
Contract exchange rate	1,290.8	1,290.8	1,290.8	1,290.8
Contract date	Dec. 15, 2023	Dec. 15, 2023	Dec. 15, 2023	Dec. 15, 2023
Matrurity date	Feb. 14, 2024	Feb. 14, 2024	Feb. 14, 2024	Feb. 14, 2024
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2020~2025	2020~2025	2020~2025	2020~2025
Pay, Contract Amount	₩ 241,320
Receive, Contract Amount | $		$ 200,000
Contract Interest rate Pay	0.54	0.54	0.54	0.54
Contract Interest rate Receive	1.13	1.13	1.13	1.13
Contract exchange rate	1,206.6	1,206.6	1,206.6	1,206.6
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2021~2026	2021~2026	2021~2026	2021~2026
Pay, Contract Amount	₩ 118,170
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	1.11	1.11	1.11	1.11
Contract Interest rate Receive	1.13	1.13	1.13	1.13
Contract exchange rate	1,181.7	1,181.7	1,181.7	1,181.7
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2022~2026	2022~2026	2022~2026	2022~2026
Pay, Contract Amount	₩ 283,820
Receive, Contract Amount | $		$ 200,000
Contract Interest rate Pay	4.67	4.67	4.67	4.67
Contract Interest rate Receive	5.38	5.38	5.38	5.38
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2022~2028	2022~2028	2022~2028	2022~2028
Pay, Contract Amount	₩ 283,820
Receive, Contract Amount | $		$ 200,000
Contract Interest rate Pay	5.12	5.12	5.12	5.12
Contract Interest rate Receive	5.50	5.50	5.50	5.50
Contract exchange rate	1,419.1	1,419.1	1,419.1	1,419.1
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2023~2026	2023~2026	2023~2026	2023~2026
Pay, Contract Amount	₩ 256,000
Receive, Contract Amount | $		$ 200,000
Contract Interest rate Pay	4.04	4.04	4.04	4.04
Contract Interest rate Receive	5.38	5.38	5.38	5.38
Contract exchange rate	1,280	1,280	1,280	1,280
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2015~2025	2015~2025	2015~2025	2015~2025
Pay, Contract Amount	₩ 111,190
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	2.62	2.62	2.62	2.62
Contract Interest rate Receive	3.25	3.25	3.25	3.25
Contract exchange rate	1,111.9	1,111.9	1,111.9	1,111.9
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2017~2027	2017~2027	2017~2027	2017~2027
Pay, Contract Amount	₩ 111,610
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	2.31	2.31	2.31	2.31
Contract Interest rate Receive	3.13	3.13	3.13	3.13
Contract exchange rate	1,116.1	1,116.1	1,116.1	1,116.1
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2018~2028	2018~2028	2018~2028	2018~2028
Pay, Contract Amount	₩ 108,600
Receive, Contract Amount | $			$ 800,000
Contract Interest rate Pay	2.69	2.69	2.69	2.69
Contract Interest rate Receive	3.35	3.35	3.35	3.35
Contract exchange rate	135.75	135.75	135.75	135.75
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2019~2027	2019~2027	2019~2027	2019~2027
Pay, Contract Amount	₩ 119,978
Receive, Contract Amount | SFr				SFr 100,000
Contract Interest rate Pay	1.43	1.43	1.43	1.43
Contract Interest rate Receive	0.05	0.05	0.05	0.05
Contract exchange rate	1,199.78	1,199.78	1,199.78	1,199.78
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2021~2026	2021~2026	2021~2026	2021~2026
Pay, Contract Amount	₩ 111,400
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	0.93	0.93	0.93	0.93
Contract Interest rate Receive	1.25	1.25	1.25	1.25
Contract exchange rate	1,114	1,114	1,114	1,114
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2022~2027	2022~2027	2022~2027	2022~2027
Pay, Contract Amount	₩ 262,000
Receive, Contract Amount | $		$ 200,000
Contract Interest rate Pay	3.63	3.63	3.63	3.63
Contract Interest rate Receive	4.25	4.25	4.25	4.25
Contract exchange rate	1,310	1,310	1,310	1,310
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2020~2026	2020~2026	2020~2026	2020~2026
Pay, Contract Amount	₩ 118,910
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	0.61	0.61	0.61	0.61
Contract Interest rate Receive	1.00	1.00	1.00	1.00
Contract exchange rate	1,189.1	1,189.1	1,189.1	1,189.1
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2021~2026	2021~2026	2021~2026	2021~2026
Pay, Contract Amount	₩ 114,230
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	1.27	1.27	1.27	1.27
Contract Interest rate Receive	1.25	1.25	1.25	1.25
Contract exchange rate	1,142.3	1,142.3	1,142.3	1,142.3
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2022~2027	2022~2027	2022~2027	2022~2027
Pay, Contract Amount	₩ 123,710
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	3.41	3.41	3.41	3.41
Contract Interest rate Receive	3.63	3.63	3.63	3.63
Contract exchange rate	1,237.1	1,237.1	1,237.1	1,237.1
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2022~2025	2022~2025	2022~2025	2022~2025
Pay, Contract Amount	₩ 128,560
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	3.37	3.37	3.37	3.37
Contract Interest rate Receive	4.13	4.13	4.13	4.13
Contract exchange rate	1,285.6	1,285.6	1,285.6	1,285.6
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2020~2025	2020~2025	2020~2025	2020~2025
Pay, Contract Amount	₩ 122,780
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	0.93	0.93	0.93	0.93
Contract Interest rate Receive	1.75	1.75	1.75	1.75
Contract exchange rate	1,227.8	1,227.8	1,227.8	1,227.8
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2022~2025	2022~2025	2022~2025	2022~2025
Pay, Contract Amount	₩ 252,360
Receive, Contract Amount | $		$ 200,000
Contract Interest rate Pay	2.83	2.83	2.83	2.83
Contract Interest rate Receive	3.60	3.60	3.60	3.60
Contract exchange rate	1,261.8	1,261.8	1,261.8	1,261.8
Cross Currency Interest Rate Contract
Disclosure of Derivatives transactions between related parties [Line Items]
Contract year	2023~2028	2023~2028	2023~2028	2023~2028
Pay, Contract Amount	₩ 129,500
Receive, Contract Amount | $		$ 100,000
Contract Interest rate Pay	3.85	3.85	3.85	3.85
Contract Interest rate Receive	4.88	4.88	4.88	4.88
Contract exchange rate	1,295	1,295	1,295	1,295

Related Parties - Summary of Sa

Related Parties - Summary of Salaries and Other Compensations To The Key Members of Management of The Company (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of Key management personnel compensation [Abstract]
Salaries	₩ 866	₩ 1,026	₩ 1,272
Retirement benefits	33	58	21
Total	₩ 899	₩ 1,084	₩ 1,293

Statement of Cash Flows - Summa

Statement of Cash Flows - Summary of Significant Non-cash Activities (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Transfer from construction-in-progress to other assets
Non Cash Transactions [Line Items]
Non-cash transactions	₩ 10,090,726	₩ 13,723,972	₩ 12,902,589
Recognition of asset retirement cost and related provision for decommissioning costs
Non Cash Transactions [Line Items]
Non-cash transactions	(292,120)	3,497,866	2,356,805
Transfer from provision for disposal of spent nuclear fuel to accrued expenses
Non Cash Transactions [Line Items]
Non-cash transactions	379,011	417,687	455,401
Transfer from long-term borrowings and debt securities to current portion of long-term borrowings and debt securities
Non Cash Transactions [Line Items]
Non-cash transactions	30,454,012	13,838,578	11,109,271
Transfer from inventory to stored nuclear fuel
Non Cash Transactions [Line Items]
Non-cash transactions	827,279	738,720	908,842
Transfer of right-of-use assets due to change in accounting policy and others
Non Cash Transactions [Line Items]
Non-cash transactions	₩ 261,862	₩ 197,016	₩ 78,213

Statement of Cash Flows - Sum_2

Statement of Cash Flows - Summary of Changes in Liabilities Incurred From Financing Activities (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	₩ 124,768,508	₩ 84,940,016
Cash flows	12,118,685	38,631,168
Increase	253,495	109,019
Effect of exchange rate fluctuations and others	299,022	1,088,305
Ending balance	137,439,710	124,768,508
Borrowings and debt securities
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	120,605,365	80,529,513
Cash flows	12,692,924	39,193,815
Increase	0	0
Effect of exchange rate fluctuations and others	333,541	882,037
Ending balance	133,631,830	120,605,365
Lease liabilities
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	4,163,143	4,410,503
Cash flows	(574,239)	(562,647)
Increase	253,495	109,019
Effect of exchange rate fluctuations and others	(34,519)	206,268
Ending balance	₩ 3,807,880	₩ 4,163,143

Commitments for Expenditure - S

Commitments for Expenditure - Summary of Commitments For Acquisition of Property, Plant and Equipment (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2023	Dec. 31, 2022
Purchase of cable (PVC, 1C, 2000SQ) 153,000M and others (Shin-Bupyung-Youngseo)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		₩ 57,226	₩ 57,203
Commitments for expenditure remaining liability balances		417	12,595
Purchase of cable (PVC, 1C, 2500SQ) 103,374M and others (Bukdangjin-Shin-Tangjung)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		51,796	50,151
Commitments for expenditure remaining liability balances		20,661	37,638
Purchase of GIS (362kV, 6300A, 63kA) 23CB – Youngseo S/S
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		37,168	37,168
Commitments for expenditure remaining liability balances		15,109	16,788
Purchase of GIS (362kV, 6300A, 63kA) 27CB – Kwangyang S/S
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		37,744	37,744
Commitments for expenditure remaining liability balances		140	140
Purchase of cable (PVC, 1C, 2500SQ) 100,548M and others (Kyungin Construction)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		58,271	58,269
Commitments for expenditure remaining liability balances		746	3,883
Purchase of GIS (362kV, 6300A, 63kA) 25CB – Migeum S/S
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		35,136	33,841
Commitments for expenditure remaining liability balances		20,370	25,641
Purchase of cable (PVC, 1C, 2000SQ) 5,862M and others (Baekun-Gwangyanghang)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		35,016	35,949
Commitments for expenditure remaining liability balances		703	3,232
Concrete pole (10M, general purpose, 350KGF) 126,948 ea and five other equipments (unit price contract)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		0	202,795
Commitments for expenditure remaining liability balances		0	95,428
Purchase of GIS (362KV, 6300A, 63KA) Type 19 – Shinyangsan S/S
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		32,460	31,834
Commitments for expenditure remaining liability balances		5,635	17,334
Purchase Of Cable (Pvc, 1c, 2500sq) 57,868m And Others (Goduk-Seoansung)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		40,937	40,937
Commitments for expenditure remaining liability balances		654	3,748
Purchase of cable (PVC, 1C, 2000SQ) 87,732M and others (Eulwangboonki)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		36,446	36,155
Commitments for expenditure remaining liability balances		1,015	10,274
Purchase of GIS(362KV,6300A,63KA) Type 18 – Wolsung S/Y
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		32,090	32,090
Commitments for expenditure remaining liability balances		26,742	32,090
Purchase of cable (FR CNCO-W,1C,325SQ) 672,300M (unit price contract)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		0	31,387
Commitments for expenditure remaining liability balances		0	19,213
Purchase of cable (TR CNCE-W,1C,325SQ) 1,342,000M (unit price contract)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		0	75,620
Commitments for expenditure remaining liability balances		0	40,497
Purchase of cable (TR CNCE-W,1C,600SQ) 377,000M (unit price contract)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		0	31,851
Commitments for expenditure remaining liability balances		0	17,478
Purchase of cable (TR CNCE-W/AL,1C,400SQ) 2,175,300M (unit price contract)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		0	53,064
Commitments for expenditure remaining liability balances		0	29,436
System stabilization ESS equipment (Bubuk S/S) Type 1
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		222,300	222,300
Commitments for expenditure remaining liability balances		145,014	222,300
System stabilization ESS equipment (Shinnamwon S/S) Type 1
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		211,500	211,500
Commitments for expenditure remaining liability balances		130,169	211,500
System stabilization ESS equipment (Yeongcheon S/S) Type 1
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		73,104	73,104
Commitments for expenditure remaining liability balances		18,604	73,104
Concrete pole (10M, general purpose, 500KGF) 111,000 ea and four other equipments
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		67,996	0
Commitments for expenditure remaining liability balances		39,971	0
Advanced EType low voltage electronic watt-hour meter 1,311,552 ea
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		36,103	0
Commitments for expenditure remaining liability balances		0	0
System stabilization ESS equipment (Yesan S/S) Type 1
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		56,403	0
Commitments for expenditure remaining liability balances		12,095	0
System stabilization ESS equipment (Hamyang S/S) Type 1
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		35,609	0
Commitments for expenditure remaining liability balances		12,870	0
Construction of Saeul Units (#3,4)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		9,800,424	9,800,424
Commitments for expenditure remaining liability balances		1,113,349	2,455,673
Construction of Shin-Hanul Units (#1,2)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts	[1]	10,592,760	10,327,372
Commitments for expenditure remaining liability balances	[1]	0	97,889
Construction of Shin-Hanul Units (#3,4)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		11,680,361	11,007,232
Commitments for expenditure remaining liability balances		10,935,737	10,858,828
Other 36 contracts
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		1,631,574	853,941
Commitments for expenditure remaining liability balances		1,133,467	425,149
Purchase of main machine for Jeju LNG combined
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		166,287	166,287
Commitments for expenditure remaining liability balances		0	10,898
Purchase of equipments for the construction project of Boryeong indoor coal storage yard
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		334,932	318,197
Commitments for expenditure remaining liability balances		279,920	287,965
Purchase of main machine for Boryeong New Complex Unit 1
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		281,600	0
Commitments for expenditure remaining liability balances		228,053	0
Boryeong New Complex Unit 1 Construction Project
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		186,358	0
Commitments for expenditure remaining liability balances		186,358	0
Service of designing Taean Units (#9,10)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		112,909	112,909
Commitments for expenditure remaining liability balances		12,468	12,468
Purchase of gas turbine and turbine equipment of Gimpo combined heat & power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		123,495	126,302
Commitments for expenditure remaining liability balances		15,603	32,748
Purchase of steam turbine, HRSG and POWER BLOCK of Gimpo combined heat & power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		220,864	221,997
Commitments for expenditure remaining liability balances		214	38,714
Construction of Gimpo combined heat & power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		211,372	181,798
Commitments for expenditure remaining liability balances		13,960	56,558
Purchase of gas turbines, steam turbines, and accessories for Gumi natural gas power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		197,983	197,983
Commitments for expenditure remaining liability balances		193,578	197,983
Purchase of heat recovery boiler and accessories for Gumi natural gas power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		65,918	0
Commitments for expenditure remaining liability balances		45,299	0
Construction of Gumi natural gas power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		210,393	204,094
Commitments for expenditure remaining liability balances		173,350	204,094
Installation of natural gas supply facility at Gumi natural gas power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		70,620	70,620
Commitments for expenditure remaining liability balances		61,799	70,620
Purchase of coal handling machine for construction of Samcheok Units (#1,2)
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		312,150	299,048
Commitments for expenditure remaining liability balances		5,682	6,687
Purchase of main equipment for Namjeju
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		140,144	140,144
Commitments for expenditure remaining liability balances		3	3
Purchase of main equipment for Shin-Sejong combined thermal power plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		234,392	234,392
Commitments for expenditure remaining liability balances		8,342	32,621
Purchase of Hadong thermal power indoor carboniferous plant
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		167,259	162,814
Commitments for expenditure remaining liability balances		48,495	62,299
Purchase of phase 2 power generation facility for Yeongwol fuel cells
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		86,350	86,100
Commitments for expenditure remaining liability balances		219	30,527
Purchase of fuel cell power generation facilities for the fifth stage of Shinincheon headquarters
Disclosure of Commitments for Expenditure [Line Items]
Commitments for Expenditure amounts		81,960	81,960
Commitments for expenditure remaining liability balances		₩ 18,290	₩ 81,960
[1]As of December 31, 2023, the commitment amounts include the Shin-Hanul Unit #1, construction of which has completed during the year ended December 31, 2022. In addition, as of December 31, 2023, Shin-hanul Unit #2 is in commissioning.

Commitments for Expenditure -_2

Commitments for Expenditure - Summary of Commitments For Inventory Purchase (Details)	12 Months Ended
	Dec. 31, 2023
Concentrate
Disclosure of contracts for inventory purchase commitment [Line Items]
Periods	2023 ~ 2033
Contracted amounts	21,400 Ton U3O8
Conversion
Disclosure of contracts for inventory purchase commitment [Line Items]
Periods	2023 ~ 2030
Contracted amounts	16,300 Ton U
Enrichment
Disclosure of contracts for inventory purchase commitment [Line Items]
Periods	2023 ~ 2032
Contracted amounts	18,893 Ton SWU

Commitments for Expenditure - A

Commitments for Expenditure - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023 t
Disclosure of Commitments for Expenditure [Line Items]
Contracted quantity of uranium	1,285

Contingencies and Commitments -

Contingencies and Commitments - Summary of Ongoing Litigations Related With Contingent Liabilities And Contingent Assets (Details) ₩ in Millions	Dec. 31, 2023 KRW (₩)	Dec. 31, 2022 KRW (₩)
As the defendant
Litigation Case [Line Items]
Number of cases	666	653
Claim amount	₩ 805,227	₩ 981,878
As the plaintiff
Litigation Case [Line Items]
Number of cases	268	238
Claim amount	₩ 571,593	₩ 599,809

Contingencies and Commitments_2

Contingencies and Commitments - Summary of Credit Lines Provided By Financial Institutions (Details) - 12 months ended Dec. 31, 2023 € in Thousands, ₨ in Thousands, ر.ع. in Thousands, ر.س in Thousands, د.إ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions		KRW (₩)	USD ($)	EUR (€)	JPY (¥)	INR (₨)	OMR (ر.ع.)	SAR (ر.س)	MXN ($)	AED (د.إ)
Commitments on Bank-overdraft
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Nonghyup Bank and others
Credit limit | ₩		₩ 2,260,500
Used amount | ₩		₩ 3,096
Limit amount available for CP
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | ₩		₩ 5,650,000
Used amount | ₩		₩ 5,650,000
General loan, etc.
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | ₩		₩ 4,400,000
Used amount | ₩		₩ 4,350,000
Limit amount available for card
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | ₩		₩ 47,424
Used amount | ₩		₩ 1,919
Loan limit
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Korea Development Bank and others
Credit limit | ₩		₩ 2,708,395
Used amount | ₩		₩ 1,969,529
Loan limit
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		DBS Bank and others
Credit limit | $			$ 1,782,000
Used amount		₩ 200,000	40,000
Certification of payment on payables from foreign country
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Nonghyup Bank
Credit limit | $			8,700
Used amount | $			5,270
Certification of payment on L/C
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Shinhan Bank and others
Credit limit | $			1,160,452
Used amount | $			178,558
Certification of payment on L/C
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Kookmin Bank and others
Credit limit | €				€ 42,688
Used amount | €				42,688
Certification of payment on L/C
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Shinhan Bank
Credit limit | ¥					¥ 481,785
Used amount | ¥					481,785
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | ₩		₩ 145,855
Used amount | ₩		₩ 125,289
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		First Abu Dhabi Bank and others
Credit limit | $			921,138
Used amount | $			788,313
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Korea Development Bank and others
Credit limit | ¥					620,000
Used amount | ¥					¥ 620,000
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank
Credit limit | €				12,106
Used amount | €				12,106
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank
Credit limit | ₨						₨ 44,872
Used amount | ₨						44,872
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank
Credit limit | ر.ع.							ر.ع. 6,250
Used amount | ر.ع.							ر.ع. 6,250
Certification of performance guarantee on contracts
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank
Credit limit | ر.س								ر.س 4,151
Used amount | ر.س								4,151
Certification of bidding
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank
Credit limit | $			5,200
Used amount | $			0
Certification of bidding
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Export-Import Bank of Korea
Credit limit | €				10,000
Used amount | €				10,000
Advance payment bond, Warranty bond, Retention bond and others
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Seoul Guarantee Insurance
Credit limit | ₩		₩ 57,670
Used amount | ₩		₩ 57,670
Advance payment bond, Warranty bond, Retention bond and others
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | $			813,839
Used amount | $			763,596
Advance payment bond, Warranty bond, Retention bond and others
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Saudi National Bank
Credit limit | ر.س								21,000
Used amount | ر.س								ر.س 21,000
Advance payment bond, Warranty bond, Retention bond and others
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | $									$ 21,597
Used amount | $									$ 20,027
Other commitments
Commitments and Contingencies Disclosure [Line Items]
Financial institutions	[1]	Nonghyup Bank and others
Credit limit | ₩	[1]	₩ 337,126
Used amount	[1]	₩ 19,943	20,832	282
Other commitments
Commitments and Contingencies Disclosure [Line Items]
Financial institutions	[1]	Nonghyup Bank and others
Credit limit | $	[1]		316,327
Used amount	[1]		60,073	€ 48,825
Other commitments
Commitments and Contingencies Disclosure [Line Items]
Financial institutions	[1]	StandardChartered
Credit limit | د.إ	[1]									د.إ 50
Used amount | د.إ	[1]									د.إ 50
Secured loan of credit sales
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Nonghyup Bank and others
Credit limit | ₩		₩ 271,000
Used amount | ₩		₩ 0
Inclusive credit
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank
Credit limit | ₩		₩ 8,000
Used amount | ₩		₩ 4,920
Inclusive credit
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Hana Bank and others
Credit limit | $			135,000
Used amount			15,141			₨ 345,206
Equity Bridge Loan Guarantee
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		Export-Import Bank of Koreaand others
Credit limit | $			1,764,555
Used amount | $			1,372,546
Trade finance
Commitments and Contingencies Disclosure [Line Items]
Financial institutions		DBS Bank and others
Credit limit | $			870,000
Used amount | $			$ 0
[1]As of December 31, 2023, the Company has entered into a credit extension agreement for derivatives transactions with Nonghyup Bank, Hana Bank, and Woori Bank as ancillary to currency swap transactions.

Contingencies and Commitments_3

Contingencies and Commitments - Summary of Blank Check And Assets Provided As Collaterals Or Pledges To Financial Institutions By The Company Explanatory (Details) - 12 months ended Dec. 31, 2023 JD in Thousands, $ in Thousands, ₩ in Millions		USD ($)	KRW (₩)	JOD (JD)
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Mira Power Limited
Name of Guarantee		International Finance Corporation and others
Value of collateral | $		$ 264,800
Description of assets pledged as collateral description	[1]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Tamra Offshore Wind Power Co., Ltd.
Name of Guarantee		Kyobo Life Insurance Co., Ltd. and others
Value of collateral			₩ 171,600
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Cash and cash equivalents
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Gyeonggi Green Energy Co., Ltd.
Name of Guarantee		Korea Development Bank and others
Value of collateral			327,080
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Commerce and Industry Energy Co., Ltd.
Name of Guarantee		IBK and others
Value of collateral			110,500
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Cash and cash equivalents
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Jeongam Wind Power Co., Ltd.
Name of Guarantee		KDB Capital Corporation and others
Value of collateral			230,259
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Gyeongju Wind Power Co., Ltd.
Name of Guarantee		Shinhan Bank and others
Value of collateral			68,400
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Korea Offshore Wind Power Co., Ltd.
Name of Guarantee		Woori Bank and others
Value of collateral			293,400
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Finance Lease receivable and property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Qatrana Electric Power Company
Name of Guarantee		The Islamic Development Bank and others
Value of collateral | JD				JD 136,623
Description of assets pledged as collateral description	[1]	Collateral for borrowings
Finance Lease receivable and property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		KST Electric Power Company, S.A.P.I. de C.V.
Name of Guarantee		Export-Import Bank of Korea and others
Value of collateral | $		$ 401,277
Description of assets pledged as collateral description	[1]	Collateral for debt securities
Cash and cash equivalents
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Incheon Fuel Cell Co., Ltd.
Name of Guarantee		Kookmin Bank and others
Value of collateral			276,960
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		K-SOLAR SHINAN Co., Ltd.
Name of Guarantee		Kyobo Life Insurance Co., Ltd. and others
Value of collateral			329,736
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Cash and cash equivalents
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		KOSPO Youngnam Power Co., Ltd.
Name of Guarantee		Shinhan Bank and others
Value of collateral			744,120
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Jeju Hanlim Offshore Wind Co., Ltd.
Name of Guarantee		Kookmin Bank and others
Value of collateral			1,800
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Western Power Changgi Solar Co., Ltd.
Name of Guarantee		Samsung Life Insurance and others
Value of collateral			58,500
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Trade receivable and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		J Wind First, LLC
Name of Guarantee		Woori Bank
Value of collateral			₩ 55,000
Description of assets pledged as collateral description	[2]	Collateral for borrowings
Property, plant and equipment and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Chitose Solar Power Plant LLC
Name of Guarantee		Korea Development Bank
Value of collateral | $		$ 134,289
Description of assets pledged as collateral description	[1]	Collateral for borrowings
Trade receivable and others
Disclsoure of assets pledged as collateral [Line Items]
Name of Guarantor		Mangilao Intermediate Holdings LLC
Name of Guarantee		Mizuho Bank
Value of collateral | $		$ 93,392
Description of assets pledged as collateral description	[1]	Collateral for borrowings
[1]This is based on the amount of loan commitment limit.[2]As of December 31, 2023, the Company has established guarantees for pledge for transfer of rights of long-term borrowings, pledge for insurance claims, pledge for shares, etc.

Contingencies and Commitments_4

Contingencies and Commitments - Additional Information (Details) € in Thousands, Rp in Thousands, $ in Thousands, ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 IDR (Rp)	Dec. 31, 2022 KRW (₩)
Detailed Information About Commitments [Line Items]
Borrowings | ₩	₩ 133,631,830					₩ 120,605,365
Six One Seven One One Nuri Ri Yeongi Myeon Seojong [Member]
Detailed Information About Commitments [Line Items]
Book value of land | ₩	₩ 64,371
Gunsan Land Solar [Member] | Ninety Nine Megawatt Photovoltaic Power Generation Facility [Member]
Detailed Information About Commitments [Line Items]
Percentage of the project cost to be financed	80%		80%	80%	80%
Percentage return on the invested capital to be provided	7%	7%
Percentage interest on the amount falling short of capital raise	7%		7%	7%	7%
Arbitration With Westing House Electric Company LLC To Korean Commercial Arbitration Board [Member]
Detailed Information About Commitments [Line Items]
Other provisions | ₩						₩ 0
Hitachi Energy Sweden Field Arbitration Case In Relation To Construction Projects [Member]
Detailed Information About Commitments [Line Items]
New provisions other provisions | ₩	₩ 0
Commercial Arbitration Expenses Payment Jindo Jeju High Voltage Direct Current Connection Contract Project [Member]
Detailed Information About Commitments [Line Items]
New provisions other provisions | ₩	0
Axia Power Holdings B.V [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			$ 54,000
PT Perusahaan Listrik Negara [Member] | Operation Maintenance Project In Indonesia Siborpa [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			2,280
Morgan Stanley Capital Group Inc [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			30,000
Morgan Stanley Renewables Inc [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			70,000
Microsoft Through Kookmin Bank [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount | €				€ 12,053
PT. Cirebon Electro Power [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			54,000
Export Import Bank Of Korea ,BNP Paribas And ING Bank [Member] | PT BS Energy And PT Nusantara Hydro Alam [Member]
Detailed Information About Commitments [Line Items]
Guarantee for investments			6,085
KOMIPO Vanphong Power Service LLC [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			5,000
Kookmin Bank [Member] | Concho Valley Energy, LLC [Member]
Detailed Information About Commitments [Line Items]
Provision for loss contingencies		$ 40,000
Gaesong Industrial Complex [Member]
Detailed Information About Commitments [Line Items]
Book value of facility | ₩	12,123
Gangneung [Member]
Detailed Information About Commitments [Line Items]
Suspended operations of plant carrying amount | ₩	62,871
Expenses related to suspension of operations | ₩	1,494
Depreaciation on idle assets | ₩	3,683
Korea Energy Agency [Member]
Detailed Information About Commitments [Line Items]
Borrowings | ₩	1,197
Mizuho Bank [Member] | PT. Cirebon Electro Power [Member] | Nongyup Bank [Member]
Detailed Information About Commitments [Line Items]
Payment guarantee			3,355
RBC Community Investments Impact Renewables Hold Co One LLC [Member]
Detailed Information About Commitments [Line Items]
Subscription amount guaranteed			62,800
RBC Community Investments Impact Renewables Hold Co One LLC [Member] | Concho Valley Energy, LLC [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount			$ 3,000
PT Perushan Listrik Negara [Member]
Detailed Information About Commitments [Line Items]
Maximum performance guarantee amount | Rp					Rp 35,588,165
Haetbyotgil Sunlight Company Limited [Member]
Detailed Information About Commitments [Line Items]
Insurance contract guarantee | ₩	₩ 1,641
Bottom of range [member] | Gunsan Land Solar [Member] | Ninety Nine Megawatt Photovoltaic Power Generation Facility [Member]
Detailed Information About Commitments [Line Items]
Percentage of the project cost to be financed	80%		80%	80%	80%
International Finance Corporation [Member]
Detailed Information About Commitments [Line Items]
Maximum borrowing capacity			$ 264,800
Capital commitments			69,808
Additional capital contribution for contingencies			19,000
PT Bank KB Bukopin [Member]
Detailed Information About Commitments [Line Items]
Debt amount guaranteed			$ 5,473
Ordinary Wages And Unpaid Wages [Member]
Detailed Information About Commitments [Line Items]
Provision for loss contingencies | ₩	₩ 39,229

Subsequent Events - Summary of

Subsequent Events - Summary of Subsequent Events (Details) - 12 months ended Dec. 31, 2023 $ in Thousands, ₩ in Millions		KRW (₩)	USD ($)
Long-term borrowing (Mid- to long-term CP)
Disclosure of non-adjusting events after reporting period [line items]
Company name	[1]	Korea Electric Power Corporation
Borrowing date	[1]	Feb. 21, 2024
Maturity	[1]	2029.02.21
Interest rate (%)	[1]	3M CD+0.49
Amounts issued for the subsequent period	[1]	₩ 200,000
Long-term borrowing (Mid- to long-term CP)
Disclosure of non-adjusting events after reporting period [line items]
Company name	[1]	Korea Electric Power Corporation
Borrowing date	[1]	Feb. 28, 2024
Maturity	[1]	2029.02.28
Interest rate (%)	[1]	3M CD+0.50
Amounts issued for the subsequent period	[1]	₩ 200,000
Long-term borrowing (Mid- to long-term CP)
Disclosure of non-adjusting events after reporting period [line items]
Company name	[1]	Korea Electric Power Corporation
Borrowing date	[1]	Apr. 05, 2024
Maturity	[1]	2027.04.05
Interest rate (%)	[1]	3M CD+0.34
Amounts issued for the subsequent period	[1]	₩ 250,000
Long-term borrowing (Mid- to long-term CP)
Disclosure of non-adjusting events after reporting period [line items]
Company name	[1]	Korea Electric Power Corporation
Borrowing date	[1]	Apr. 11, 2024
Maturity	[1]	2027.04.09
Interest rate (%)	[1]	3M CD+0.48
Amounts issued for the subsequent period	[1]	₩ 250,000
Long-term borrowing
Disclosure of non-adjusting events after reporting period [line items]
Company name		KEPCO Nuclear Fuel Co., Ltd.
Borrowing date		Jan. 04, 2024
Maturity		2026.12.28
Interest rate (%)		3M Bank debenture rate+0.66
Amounts issued for the subsequent period		₩ 10,000
FY24 Global 15th
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Electric Power Corporation
Issue date		Jan. 31, 2024
Maturity		2027.01.31
Interest rate (%)		4.88
Amounts issued for the subsequent period | $			$ 1,200,000
77-1 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Hydro & Nuclear Power Co., Ltd.
Issue date		Mar. 05, 2024
Maturity		2029.03.05
Interest rate (%)		5yr KTB rate+0.35
Amounts issued for the subsequent period		₩ 150,000
77-2 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Hydro & Nuclear Power Co., Ltd.
Issue date		Mar. 05, 2024
Maturity		2034.03.05
Interest rate (%)		10yr KTB rate+0.41
Amounts issued for the subsequent period		₩ 100,000
77-3 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Hydro & Nuclear Power Co., Ltd.
Issue date		Mar. 05, 2024
Maturity		2044.03.05
Interest rate (%)		20yr KTB rate+0.40
Amounts issued for the subsequent period		₩ 60,000
78-1 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Hydro & Nuclear Power Co., Ltd.
Issue date		Mar. 25, 2024
Maturity		2029.03.25
Interest rate (%)		3.62
Amounts issued for the subsequent period		₩ 100,000
78-2 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Hydro & Nuclear Power Co., Ltd.
Issue date		Mar. 25, 2024
Maturity		2034.03.25
Interest rate (%)		3.74
Amounts issued for the subsequent period		₩ 90,000
78-3 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Hydro & Nuclear Power Co., Ltd.
Issue date		Mar. 25, 2024
Maturity		2044.03.25
Interest rate (%)		3.72
Amounts issued for the subsequent period		₩ 100,000
60-1 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Western Power Co., Ltd.
Issue date		Jan. 16, 2024
Maturity		2026.01.16
Interest rate (%)		3.67
Amounts issued for the subsequent period		₩ 150,000
60-2 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Western Power Co., Ltd.
Issue date		Jan. 16, 2024
Maturity		2029.01.16
Interest rate (%)		3.73
Amounts issued for the subsequent period		₩ 50,000
60-3 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Western Power Co., Ltd.
Issue date		Jan. 16, 2024
Maturity		2044.01.16
Interest rate (%)		3.74
Amounts issued for the subsequent period		₩ 20,000
61-1 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Western Power Co., Ltd.
Issue date		Jan. 25, 2024
Maturity		2025.01.24
Interest rate (%)		3.54
Amounts issued for the subsequent period		₩ 100,000
61-2 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Western Power Co., Ltd.
Issue date		Jan. 25, 2024
Maturity		2027.01.25
Interest rate (%)		3.73
Amounts issued for the subsequent period		₩ 40,000
61-3 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Western Power Co., Ltd.
Issue date		Jan. 25, 2024
Maturity		2044.01.25
Interest rate (%)		3.82
Amounts issued for the subsequent period		₩ 10,000
72-1 Corporate Bonds
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Southern Power Co., Ltd.
Issue date		Jan. 11, 2024
Maturity		2027.01.11
Interest rate (%)		3.70
Amounts issued for the subsequent period		₩ 70,000
72-2 Corporate Bonds
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea Southern Power Co., Ltd.
Issue date		Jan. 11, 2024
Maturity		2029.01.11
Interest rate (%)		3.79
Amounts issued for the subsequent period		₩ 30,000
47-1 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea East-West Power Co., Ltd.
Issue date		Apr. 08, 2024
Maturity		2027.04.08
Interest rate (%)		3.62
Amounts issued for the subsequent period		₩ 30,000
47-2 Corporate bond
Disclosure of non-adjusting events after reporting period [line items]
Company name		Korea East-West Power Co., Ltd.
Issue date		Apr. 08, 2024
Maturity		2029.04.06
Interest rate (%)		3.67
Amounts issued for the subsequent period		₩ 50,000
[1]The maturity of mid- to long-term CPs corresponds to contract period of commercial paper repurchase agreements.

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - KRW (₩) ₩ in Millions	Feb. 23, 2024	Feb. 15, 2024
Disposal of major subsidiary [member]
Disclosure of non-adjusting events after reporting period [line items]
Percentage Of Shares Sold		21.43%
Sale of stock shares value		₩ 221,490
Entering into significant commitments or contingent liabilities [member]
Disclosure of non-adjusting events after reporting period [line items]
Value of contribution for construction of campus of korea institute of energy technology	₩ 76,600