SK Telecom Co.,Ltd (SKM) 20-F 28 Apr 22 2021 FY Annual report (foreign) Financial data

Cover Page

Cover Page	12 Months Ended
	Dec. 31, 2021shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Registrant Name	SK TELECOM CO LTD
Entity Central Index Key	0001015650
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	217,582,152
Entity File Number	1-14418
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Address, Country	KR
Entity Address, Address Line One	65, Eulji-ro
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
ICFR Auditor Attestation Flag	true
Document Registration Statement	false
Entity Address, City or Town	Jung-gu
Entity Address, Postal Zip Code	04539
Entity Incorporation, State or Country Code	M5
Document Accounting Standard	International Financial Reporting Standards
Auditor Name	KPMG Samjong Accounting Corp.
Auditor Firm ID	1357
Auditor Location	Seoul, Korea
Business Contact [Member]
Document Information [Line Items]
Entity Address, Country	KR
Entity Address, Address Line One	65, Eulji-ro
Entity Address, City or Town	Jung-gu
Entity Address, Postal Zip Code	04539
Contact Personnel Name	Ms. Bomi Kang
Contact Personnel Fax Number	82-2-6100-7830
Local Phone Number	6100-2114
City Area Code	82-2
ADS [Member]
Document Information [Line Items]
Trading Symbol	SKM
Title of 12(b) Security	American Depositary Shares
Security Exchange Name	NYSE
Common Stock [Member]
Document Information [Line Items]
Trading Symbol	SKM
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE

Consolidated Statements of Fina

Consolidated Statements of Financial Position - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	₩ 872,731	₩ 1,369,653
Short-term financial instruments	508,677	1,426,952
Short-term investment securities	5,010	150,392
Accounts receivable — trade, net	1,913,511	2,188,893
Short-term loans, net	70,817	97,464
Accounts receivable — other, net	548,362	979,044
Contract assets	76,698	100,606
Prepaid expenses	1,987,503	2,128,349
Prepaid income taxes	77	1,984
Derivative financial assets	30,110	8,704
Inventories, net	204,637	171,443
Non-current assets held for sale	8,734	0
Advanced payments and others	125,798	151,602
Total Current Assets	6,352,665	8,775,086
Non-Current Assets:
Long-term financial instruments	375	893
Long-term investment securities	1,715,078	1,648,837
Investments in associates and joint ventures	2,197,351	14,354,113
Investment property, net	23,034	0
Property and equipment, net	12,871,259	13,377,077
Goodwill	2,072,493	3,357,524
Intangible assets, net	3,869,769	4,436,194
Long-term contract assets	41,580	47,675
Long-term loans, net	21,979	40,233
Long-term accounts receivable — other	275,238	332,803
Long-term prepaid expenses	1,069,148	1,063,711
Guarantee deposits	186,713	172,474
Long-term derivative financial assets	187,484	155,991
Deferred tax assets	128	105,088
Defined benefit assets	18,427	3,557
Other non-current assets	8,556	35,701
Total Non-Current Assets	24,558,612	39,131,871
Total Assets	30,911,277	47,906,957
Current Liabilities:
Accounts payable — trade	190,559	372,909
Accounts payable — other	2,071,870	2,484,466
Withholdings	790,489	1,410,239
Contract liabilities	166,436	229,892
Accrued expenses	1,295,404	1,554,889
Income tax payable	192,221	219,766
Derivative financial liabilities	52	77
Provisions	61,656	69,363
Short-term borrowings	12,998	109,998
Current portion of long-term debt, net	1,430,324	939,237
Current portion of long-term payables — other	398,823	424,600
Lease liabilities	349,568	359,936
Other current liabilities	35	2,595
Total Current Liabilities	6,960,435	8,177,967
Non-Current Liabilities:
Debentures, excluding current portion, net	7,037,424	7,690,169
Long-term borrowings, excluding current portion, net	353,122	1,979,261
Long-term payables — other	1,611,010	1,142,354
Long-term lease liabilities	1,184,714	1,076,841
Long-term contract liabilities	36,531	30,704
Defined benefit liabilities	13,157	154,944
Long-term derivative financial liabilities	321,084	375,083
Long-term provisions	65,339	81,514
Deferred tax liabilities	941,301	2,709,075
Other non-current liabilities	52,022	92,802
Total Non-Current Liabilities	11,615,704	15,332,747
Total Liabilities	18,576,139	23,510,714
Shareholders' Equity
Share capital	30,493	44,639
Capital surplus and others	(12,022,485)	278,444
Hybrid bonds	398,759	398,759
Retained earnings	22,437,341	22,981,913
Reserves	735,238	40,139
Equity attributable to owners of the Parent Company	11,579,346	23,743,894
Non-controlling interests	755,792	652,349
Total Shareholders' Equity	12,335,138	24,396,243
Total Liabilities and Shareholders' Equity	₩ 30,911,277	₩ 47,906,957

Consolidated Statements of Inco

Consolidated Statements of Income - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating revenue and other income:
Revenue	₩ 16,748,585	₩ 16,087,747	₩ 15,416,431
Other income	115,763	95,751	95,583
Operating revenue and other income	16,864,348	16,183,498	15,512,014
Operating expenses:
Labor	2,300,754	2,108,496	1,981,864
Commissions	5,426,114	5,103,012	4,766,682
Depreciation and amortization	3,672,555	3,664,665	3,540,984
Network interconnection	749,599	770,712	752,334
Leased lines	310,141	293,960	262,268
Advertising	233,401	272,091	279,846
Rent	140,418	171,179	152,589
Cost of goods sold	1,167,417	1,106,001	1,378,105
Others	1,431,587	1,658,362	1,410,288
Operating expenses	15,431,986	15,148,478	14,524,960
Operating profit	1,432,362	1,035,020	987,054
Finance income	155,133	140,685	121,692
Finance costs	(315,604)	(322,943)	(334,912)
Gain relating to investments in subsidiaries, associates and joint ventures, net	446,300	52,456	33,199
Profit before income tax	1,718,191	905,218	807,033
Income tax expense	446,796	221,262	262,940
Profit from continuing operations	1,271,395	683,956	544,093
Profit from discontinued operations, net of taxes	1,147,594	816,582	316,640
Profit for the year	2,418,989	1,500,538	860,733
Attributable to:
Owners of the Parent Company	2,407,523	1,504,352	888,698
Non-controlling interests	₩ 11,466	₩ (3,814)	₩ (27,965)
Earnings per share(Restated):
Basic earnings per share (in won)	₩ 7,191	₩ 4,093	₩ 2,425
Basic earnings per share — continuing operations (in won)	3,614	1,741	1,469
Diluted earnings per share (in won)	7,187	4,092	2,425
Diluted earnings per share — continuing operations (in won)	₩ 3,613	₩ 1,741	₩ 1,469

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of comprehensive income [abstract]
Profit for the year	₩ 2,418,989	₩ 1,500,538	₩ 860,733
Items that will never be reclassified to profit or loss, net of taxes:
Remeasurement of defined benefit liabilities	16,374	(2,637)	(72,605)
Net change in other comprehensive income (loss) of investments in associates and joint ventures	4,796	271	(19,269)
Valuation gain (loss) on financial assets at fair value through other comprehensive income	920,871	579,678	(17,943)
Items that are or may be reclassified subsequently to profit or loss, net of taxes:
Net change in other comprehensive income (loss) of investments in associates and joint ventures	356,503	(114,478)	75,763
Net change in unrealized fair value of derivatives	16,133	19,138	40,681
Foreign currency translation differences for foreign operations	47,515	(20,150)	(5,618)
Other comprehensive income for the year, net of taxes	1,362,192	461,822	1,009
Total comprehensive income	3,781,181	1,962,360	861,742
Total comprehensive income (loss) attributable to:
Owners of the Parent Company	3,473,445	1,869,075	891,051
Non-controlling interests	₩ 307,736	₩ 93,285	₩ (29,309)

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - KRW (₩) ₩ in Millions	Total	Share capital [member]	Capital surplus (deficit) and others [member]	Hybrid bonds [member]	Retained earnings [member]	Reserves [member]	Attributable to owners [member]	Non-controlling interests [member]
Balance (Previously stated [member]) at Dec. 31, 2018	₩ 22,324,561	₩ 44,639	₩ 256,325	₩ 398,759	₩ 22,120,355	₩ (373,442)	₩ 22,446,636	₩ (122,075)
Balance (Changes in accounting policy [member]) at Dec. 31, 2018	(5,393)				(5,393)		(5,393)
Balance (Increase (decrease) due to application of IFRS 16 [member]) at Dec. 31, 2018	(24,689)				(24,186)		(24,186)	(503)
Balance (Restated balance [member]) at Dec. 31, 2018	22,319,168	44,639	256,325	398,759	22,114,962	(373,442)	22,441,243	(122,075)
Balance at Dec. 31, 2018	22,349,250	44,639	256,325	398,759	22,144,541	(373,442)	22,470,822	(121,572)
Total comprehensive income:
Profit (loss) for the year	860,733				888,698		888,698	(27,965)
Other comprehensive income (loss) (note 12,21,22,28,30)	1,009				(41,513)	43,866	2,353	(1,344)
Total comprehensive income	861,742				847,185	43,866	891,051	(29,309)
Transactions with owners:
Annual dividends (note 33)	(667,978)				(646,828)		(646,828)	(21,150)
Interim dividends (note 33)	(80,520)				(71,870)		(71,870)	(8,650)
Share option (note 26)	1,059		295				295	764
Interest on hybrid bonds	(14,766)				(14,766)		(14,766)
Disposal of treasury shares (note 24)	300,000		300,000				300,000
Changes in ownership in subsidiaries (note 11)	98,229		51,102				51,102	47,127
Transactions with owners	(363,976)		351,397		(733,464)		(382,067)	18,091
Balance at Dec. 31, 2019	22,816,934	44,639	607,722	398,759	22,228,683	(329,576)	22,950,227	(133,293)
Total comprehensive income:
Profit (loss) for the year	1,500,538				1,504,352		1,504,352	(3,814)
Other comprehensive income (loss) (note 12,21,22,28,30)	461,822				(4,992)	369,715	364,723	97,099
Total comprehensive income	1,962,360				1,499,360	369,715	1,869,075	93,285
Transactions with owners:
Annual dividends (note 33)	(663,999)				(658,228)		(658,228)	(5,771)
Interim dividends (note 33)	(73,136)				(73,136)		(73,136)
Share option (note 26)	1,435		179				179	1,256
Interest on hybrid bonds	(14,766)				(14,766)		(14,766)
Changes in ownership in subsidiaries (note 11)	794,079		97,207				97,207	696,872
Transactions with owners	(383,051)		(329,278)		(746,130)		(1,075,408)	692,357
Acquisition of treasury shares (note 24)	(426,664)		(426,664)				(426,664)
Balance at Dec. 31, 2020	24,396,243	44,639	278,444	398,759	22,981,913	40,139	23,743,894	652,349
Total comprehensive income:
Profit (loss) for the year	2,418,989				2,407,523		2,407,523	11,466
Other comprehensive income (loss) (note 12,21,22,28,30)	1,362,192				26,371	1,039,551	1,065,922	296,270
Total comprehensive income	3,781,181				2,433,894	1,039,551	3,473,445	307,736
Transactions with owners:
Annual dividends (note 33)	(667,715)				(641,944)		(641,944)	(25,771)
Interim dividends (note 33)	(355,804)				(355,804)		(355,804)
Share option (note 26)	87,622		75,498				75,498	12,124
Interest on hybrid bonds	(14,766)				(14,766)		(14,766)
Disposal of treasury shares (note 24)	57,017		57,017				57,017
Changes from spin-off (note 41)	(15,005,397)	(14,146)	(14,460,588)			(344,452)	(14,819,186)	(186,211)
Changes in ownership in subsidiaries (note 11)	132,868		137,303				137,303	(4,435)
Transactions with owners	(15,842,286)	(14,146)	(12,300,929)		(2,978,466)	(344,452)	(15,637,993)	(204,293)
Acquisition of treasury shares (note 24)	(76,111)		(76,111)				(76,111)
Retirement of treasury shares (note 24)	1,965,952		1,965,952		(1,965,952)
Balance at Dec. 31, 2021	₩ 12,335,138	₩ 30,493	₩ (12,022,485)	₩ 398,759	₩ 22,437,341	₩ 735,238	₩ 11,579,346	₩ 755,792

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash generated from operating activities
Profit for the year	₩ 2,418,989	₩ 1,500,538	₩ 860,733
Adjustments for income and expenses	3,473,779	4,256,654	4,435,039
Changes in assets and liabilities related to operating activities	(568,695)	302,458	(856,130)
Sub-total	5,324,073	6,059,650	4,439,642
Interest received	37,403	41,832	56,392
Dividends received	327,906	166,019	241,117
Interest paid	(306,634)	(397,351)	(360,439)
Income tax paid	(351,469)	(48,274)	(341,728)
Net cash provided by operating activities	5,031,279	5,821,876	4,034,984
Cash inflows from investing activities:
Decrease in short-term financial instruments, net	162,565		253,971
Decrease in short-term investment securities, net	32,544	17,684	29,503
Collection of short-term loans	137,196	77,114	113,345
Decrease in long-term financial instruments	343	99	231
Proceeds from disposals of long-term investment securities	78,261	46,065	234,683
Proceeds from disposals of investments in associates and joint ventures	100,634	2,715	220
Proceeds from disposals of property and equipment	61,425	102,526	18,478
Proceeds from disposals of intangible assets	14,618	39,654	7,327
Collection of long-term loans	4,166	4,608	4,435
Decrease in deposits	6,941	16,244	9,180
Proceeds from settlement of derivatives	1,495	845	601
Collection of lease receivables			27,712
Proceeds from disposals of subsidiaries		165	4,802
Cash inflow from business combination, net		115,834	5,016
Cash inflow from transfers of business, net		5,395	45,658
Sub-total	600,188	428,948	755,162
Cash outflows for investing activities:
Increase in short-term financial instruments, net		(596,025)
Increase in short-term loans	(100,209)	(103,604)	(116,320)
Increase in long-term loans	(9,877)	(11,044)	(11,541)
Increase in long-term financial instruments	(21)	(2)
Acquisitions of long-term investment securities	(286,566)	(95,474)	(383,976)
Acquisitions of investments in associates and joint ventures	(222,765)	(170,292)	(264,015)
Acquisitions of property and equipment	(2,915,851)	(3,557,800)	(3,375,883)
Acquisitions of intangible assets	(392,588)	(129,976)	(141,010)
Increase in deposits	(51,274)	(12,175)	(6,164)
Cash outflow for business combinations, net	(107,226)	(2,958)	(36,910)
Cash outflow for disposal and liquidation of subsidiaries			(927)
Sub-total	(4,086,377)	(4,679,350)	(4,336,746)
Net cash used in investing activities	(3,486,189)	(4,250,402)	(3,581,584)
Cash inflows from financing activities:
Proceeds from short-term borrowings, net		76,375
Proceeds from issuance of debentures	873,245	1,420,962	1,633,444
Proceeds from long-term borrowings	350,000	1,947,848
Increase in financial liabilities at FVTPL	129,123
Cash inflows from settlement of derivatives	332	36,691	12,426
Proceeds from disposals of treasury shares	14		300,000
Transactions with non-controlling shareholders	444,124	17,766	101,398
Sub-total	1,796,824	3,499,642	2,047,268
Cash outflows for financing activities:
Repayments of short-term borrowings, net	(50,823)		(59,860)
Repayments of long-term payables — other	(426,267)	(428,100)	(428,153)
Repayments of debentures	(890,000)	(975,500)	(940,000)
Repayments of long-term borrowings	(286,868)	(1,950,874)	(89,882)
Payments of dividends	(1,028,520)	(742,136)	(718,698)
Payments of interest on hybrid bonds	(14,766)	(14,766)	(14,766)
Repayments of lease liabilities	(431,674)	(412,666)	(443,238)
Acquisitions of treasury shares	(76,111)	(426,664)
Cash outflows resulting from spin-off	(626,000)
Transactions with non-controlling shareholders	(19,406)	(6,515)	(39,345)
Sub-total	(3,850,435)	(4,957,221)	(2,733,942)
Net cash used in financing activities	(2,053,611)	(1,457,579)	(686,674)
Net increase (decrease) in cash and cash equivalents	(508,521)	113,895	(233,274)
Cash and cash equivalents at beginning of the year	1,369,653	1,270,824	1,506,699
Effects of exchange rate changes on cash and cash equivalents	11,599	(15,066)	(2,601)
Cash and cash equivalents at end of the year	₩ 872,731	₩ 1,369,653	₩ 1,270,824

Reporting Entity

Reporting Entity	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Reporting Entity	1. Reporting Entity (1) General SK Telecom Co., Ltd. (“the Parent Company”) was incorporated in March 1984 under the laws of the Republic of Korea (“Korea”) to provide cellular telephone communication services in Korea. The Parent Company mainly provides wireless telecommunications services in Korea. The head office of the Parent Company is located at 65, Eulji-ro, Jung-gu, The Parent Company’s common shares and depositary receipts (DRs) are listed on the Stock Market of Korea Exchange, the New York Stock Exchange and the London Stock Exchange. As of December 31, 2021 and 2020, the Parent Company’s total issued shares are held by the following shareholders: Number of shares Percentage of 2021 2020 2021 2020 SK Inc. 65,668,397 21,624,120 30.00 26.78 National Pension Service 21,076,493 8,853,906 9.63 10.97 Institutional investors and other shareholders 126,990,775 39,582,507 58.04 49.02 Kakao Co rp . 3,846,487 1,266,620 1.76 1.57 Treasury shares 1,250,992 9,418,558 0.57 11.66 218,833,144 80,745,711 100.00 100.00 These consolidated financial statements comprise the Parent Company and its subsidiaries (together referred to as the “Group” and individually as “Group entity”). SK Inc. is the ultimate controlling entity of the Parent Company. On November 1, 2021, the date of spin-off, the Parent Company completed the spin-off (2) List of subsidiaries The list of subsidiaries as of December 31, 2021 and 2020 is as follows: Ownership (%)(*1) Subsidiary Location Primary business Dec. 31, 2021 Dec. 31, Subsidiaries owned by the Parent Company SK Telink Co., Ltd. Korea Telecommunication and Mobile Virtual Network Operator service 100.0 100.0 SK Communications Co., Ltd. Korea Internet website services 100.0 100.0 SK Broadband Co., Ltd. Korea Telecommunication services 74.3 74.3 PS&Marketing Corporation Korea Communications device retail business 100.0 100.0 SERVICE ACE Co., Ltd. Korea Call center management service 100.0 100.0 SERVICE TOP Co., Ltd. Korea Call center management service 100.0 100.0 SK O&S Co., Ltd. Korea Base station maintenance service 100.0 100.0 SK Telecom China Holdings Co., Ltd. China Investment (Holdings company) 100.0 100.0 SK Global Healthcare Business Group Ltd. Hong Kong Investment 100.0 100.0 YTK Investment Ltd. Cayman Islands Investment association 100.0 100.0 Atlas Investment Cayman Islands Investment association 100.0 100.0 SKT Americas, Inc. USA Information gathering and consulting 100.0 100.0 One Store Co., Ltd.(*2) Korea Telecommunication services — 52.1 Ownership (%)(*1) Subsidiary Location Primary business Dec. 31, 2021 Dec. 31, SK Planet Co., Ltd.(*2) Korea Telecommunication services, system software development and supply services — 98.7 Eleven Street Co., Ltd.(*2) Korea E-commerce — 80.3 DREAMUS COMPANY(*2) Korea Manufacturing digital audio players and other portable media devices — 51.4 SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*2) Korea Information security and unmanned security service — 62.6 Quantum Innovation Fund I Korea Investment 59.9 59.9 SK Telecom Japan Inc. Japan Information gathering and consulting 100.0 100.0 id Quantique SA(*2) Switzerland Quantum information and communications service — 68.1 SK Square Americas, Inc. (Formerly, SK Telecom TMT InvestmentCorp.)(*2) USA Investment — 100.0 FSK L&S Co., Ltd.(*2) Korea Freight and logistics consulting business — 60.0 Incross Co., Ltd.(*2) Korea Media representative business — 34.6 Happy Hanool Co., Ltd. Korea Service 100.0 100.0 SK stoa Co., Ltd. Korea Other telecommunication retail business 100.0 100.0 Broadband Nowon Co., Ltd.(*3) Korea Cable broadcasting services 100.0 55.0 T map Mobility Co., Ltd.(*2) Korea Mobility business — 100.0 Subsidiaries owned by SK Planet Co., Ltd.(*2) SK m&service Co., Ltd. Korea Database and Internet website service — 100.0 SK Planet Global Holdings Pte. Ltd. Singapore Investment (Holdings company) — 100.0 SKP America LLC. USA Digital contents sourcing service — 100.0 K-net Korea Capital investing in startups — 59.0 Subsidiaries owned by DREAMUS COMPANY(*2) iriver Enterprise Ltd. Hong Kong Management of Chinese subsidiaries — 100.0 iriver China Co., Ltd. China Sales and manufacturing of MP3 and 4 — 100.0 Dongguan iriver Electronics Co., Ltd. China Sales and manufacturing of e-book devices — 100.0 LIFE DESIGN COMPANY Inc. Japan Sales of goods in Japan — 100.0 Subsidiaries owned by SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*2) SKinfosec Information Technology(Wuxi) Co., Ltd. China System software development and supply services — 100.0 ADT CAPS Co., Ltd. Korea Unmanned security — 100.0 CAPSTEC Co., Ltd. Korea Manned security — 100.0 Subsidiaries owned by SK Broadband Co., Ltd. Home & Service Co., Ltd. Korea Operation of information and communication facility 100.0 100.0 Media S Co., Ltd.(*2) Korea Production and supply services of broadcasting programs 100.0 — Subsidiary owned by Quantum Innovation Fund I PanAsia Semiconductor Materials LLC. Korea Investment 66.4 66.4 Subsidiary owned by SK Telecom Japan Inc. SK Planet Japan, K. K. Japan Digital contents sourcing service 79.8 79.8 Subsidiary owned by id Quantique SA(*2) Id Quantique LLC Korea Quantum information and communications service — 100.0 Ownership (%)(*1) Subsidiary Location Primary business Dec. 31, 2021 Dec. 31, Subsidiaries owned by FSK L&S Co., Ltd.(*2) FSK L&S (Shanghai) Co., Ltd. China Logistics business — 66.0 FSK L&S (Hungary) Co., Ltd. Hungary Logistics business — 100.0 FSK L&S VIETNAM COMPANY LIMITED Vietnam Logistics business — 100.0 Subsidiaries owned by Incross Co., Ltd.(*2) Infra Communications Co., Ltd. Korea Service operation — 100.0 Mindknock Co., Ltd. Korea Software development — 100.0 Others(*4) SK Telecom Innovation Fund, L.P. USA Investment 100.0 100.0 SK Telecom China Fund I L.P. Cayman Islands Investment 100.0 100.0 (*1) The ownership interest represents direct ownership interest in subsidiaries either by the Parent Company or subsidiaries of the Parent Company. (*2) Details of changes in the consolidation scope for year ended December 31, 2021 are presented in note 1-(4). (*3) The Parent Company acquired 513,000 shares (45%) of Broadband Nowon Co., Ltd. at ￦ (*4) Others are owned by Atlas Investment and another subsidiary of the Parent Company. (3) Condensed financial information of subsidiaries 1) Condensed financial information of significant subsidiaries as of and for the year ended December 31, 2021 is as follows: (In millions of won) As of December 31, 2021 2021 Subsidiary Total assets Total Total Revenue Profit SK Telink Co., Ltd. ￦ 174,837 52,821 122,016 313,404 8,846 SK Broadband Co., Ltd. 5,971,505 3,091,837 2,879,668 4,058,997 213,468 PS&Marketing Corporation 478,745 263,457 215,288 1,445,540 3,179 SERVICE ACE Co., Ltd. 99,059 66,496 32,563 197,146 2,519 SERVICE TOP Co., Ltd. 72,026 46,067 25,959 185,452 2,066 SK O&S Co., Ltd. 95,748 58,870 36,878 285,591 69 Home & Service Co., Ltd. 131,947 90,775 41,172 405,255 550 SK stoa Co., Ltd. 107,943 59,931 48,012 316,249 19,163 2) Condensed financial information of significant subsidiaries as of and for the year ended December 31, 2020 is as follows: (In millions of won) As of December 31, 2020 2020 Subsidiary Total assets Total Total Revenue Profit SK Telink Co., Ltd. ￦ 176,872 60,702 116,170 351,334 18,010 Eleven Street Co., Ltd. 999,225 542,534 456,691 545,556 (29,623 ) SK m&service Co., Ltd. 129,738 74,962 54,776 214,949 2,759 SK Broadband Co., Ltd. 5,765,808 3,119,489 2,646,319 3,713,021 150,694 K-net 377,683 65,896 311,787 — (44,737 ) PS&Marketing Corporation 470,521 257,809 212,712 1,427,218 (847 ) SERVICE ACE Co., Ltd. 96,258 71,890 24,368 206,612 2,905 SERVICE TOP Co., Ltd. 69,496 51,584 17,912 195,479 2,592 SK O&S Co., Ltd. 88,663 54,012 34,651 278,948 778 SK Planet Co., Ltd. 536,981 214,846 322,135 276,462 1,305 DREAMUS COMPANY(*1) 172,443 76,642 95,801 226,329 (23,068 ) SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*2) 2,927,396 2,550,936 376,460 1,327,150 14,227 One Store Co., Ltd. 243,442 99,943 143,499 155,218 1,952 Home & Service Co., Ltd. 124,197 88,740 35,457 397,754 (20 ) SK stoa Co., Ltd. 107,982 79,339 28,643 268,693 17,154 FSK L&S Co., Ltd.(*3) 66,117 35,192 30,925 205,623 3,022 Incross Co., Ltd.(*4) 179,308 104,778 74,530 39,440 12,307 T map Mobility Co., Ltd. 170,381 17,179 153,202 — (1,857 ) (*1) The condensed financial information of DREAMUS COMPANY is consolidated financial information including iriver Enterprise Ltd. and three other subsidiaries of DREAMUS COMPANY. (*2) The condensed financial information of SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) is consolidated financial information including SKinfosec Information Technology(Wuxi) Co., Ltd. and two other subsidiaries of SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) and including profit and loss which Life Security & Holdings Co., Ltd. recognized prior to the merger. (*3) The condensed financial information of FSK L&S Co., Ltd. is consolidated financial information including FSK L&S (Shanghai) Co., Ltd. and two other subsidiaries of FSK L&S Co., Ltd. (*4) The condensed financial information of Incross Co., Ltd. is consolidated financial information including Infra Communications Co., Ltd. and another subsidiary of Incross Co., Ltd. Condensed financial information of the significant subsidiaries as of and for the year ended December 31, 2019 is as follows: (In millions of won) As of December 31, 2019 2019 Subsidiary Total assets Total Total Revenue Profit SK Telink Co., Ltd.(*1) ￦ 265,725 77,378 188,347 363,627 3,010 Eleven Street Co., Ltd. 923,424 446,432 476,992 530,489 (5,077 ) SK m&service Co., Ltd. 109,699 58,605 51,094 218,848 2,448 SK Broadband Co., Ltd. 4,565,732 2,930,482 1,635,250 3,170,691 47,701 K-net 151,493 21,163 130,330 — (294 ) PS&Marketing Corporation 439,947 225,942 214,005 1,684,576 96 SERVICE ACE Co., Ltd. 80,844 55,133 25,711 206,080 3,906 SERVICE TOP Co., Ltd. 66,932 50,060 16,872 193,377 2,230 SK O&S Co., Ltd. 96,446 62,086 34,360 281,634 1,724 SK Planet Co., Ltd. 595,838 278,438 317,400 275,544 1,214 DREAMUS COMPANY(*2) 171,586 53,669 117,917 196,961 (48,006 ) Life & Security Holdings Co., Ltd.(*3) 2,639,781 2,330,920 308,861 913,301 12,703 SK Infosec Co., Ltd.(*4) 158,424 61,644 96,780 270,423 18,520 One Store Co., Ltd. 236,329 93,625 142,704 135,116 (5,415 ) Home & Service Co., Ltd. 121,202 84,378 36,824 351,154 (427 ) SK stoa Co., Ltd. 70,754 59,207 11,547 196,063 875 FSK L&S Co., Ltd.(*5) 47,550 19,651 27,899 130,872 306 Incross Co., Ltd.(*6) 144,263 78,519 65,744 19,787 5,756 (*1) The condensed financial information of SK Telink Co., Ltd. is consolidated financial information including SK TELINK VIETNAM Co., Ltd. (*2) The condensed financial information of DREAMUS COMPANY is consolidated financial information including iriver Enterprise Ltd. and three other subsidiaries of DREAMUS COMPANY. (*3) The condensed financial information of Life & Security Holdings Co., Ltd. is consolidated financial information including ADT CAPS Co., Ltd. and two other subsidiaries of Life & Security Holdings Co., Ltd. (*4) The condensed financial information of SK Infosec Co., Ltd. is consolidated financial information including SKinfosec Information Technology(Wuxi) Co., Ltd. (*5) The condensed financial information of FSK L&S Co., Ltd. is consolidated financial information including FSK L&S (Shanghai) Co., Ltd. and another subsidiary of FSK L&S Co., Ltd. (*6) The condensed financial information of Incross Co., Ltd. is consolidated financial information including Infra Communications Co., Ltd. and another subsidiary from the date of acquisition to December 31, 2019. (4) Changes in subsidiaries 1) The list of subsidiaries that were newly included in consolidation for the year ended December 31, 2021 is as follows: Subsidiary Reason Studio Dolphin Co., Ltd. Acquired by DREAMUS COMPANY Media S Co., Ltd. Established by SK Broadband Co., Ltd. FSK L&S (Jiangsu) Co., Ltd. Established by FSK L&S Co., Ltd. Rokmedia Co., Ltd. Acquired by One Store Co., Ltd. YLP Inc. Acquired by T map Mobility Co., Ltd. GOOD SERVICE Co., Ltd. Acquired by T map Mobility Co., Ltd. CAPS America, Inc. Established by SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) 2) The list of subsidiaries that were excluded from consolidation for the year ended December 31, 2021 is as follows: Subsidiary Reason ADT CAPS Co., Ltd. Merged into SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd., at the time of merger, SK Infosec Co., Ltd.) One Store Co., Ltd. Transferred to spin-off SK Planet Co., Ltd. Transferred to spin-off Eleven Street Co., Ltd. Transferred to spin-off DREAMUS COMPANY Transferred to spin-off SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) Transferred to spin-off id Quantique SA Transferred to spin-off SK Square Americas, Inc. (Formerly, SK Telecom TMT Investment Corp.) Transferred to spin-off FSK L&S Co., Ltd. Transferred to spin-off Incross Co., Ltd. Transferred to spin-off T map Mobility Co., Ltd. Transferred to spin-off Rokmedia Co., Ltd. Transferred to spin-off SK m&service Co., Ltd. Transferred to spin-off SK Planet Global Holdings Pte. Ltd. Transferred to spin-off SKP America LLC. Transferred to spin-off K-net Transferred to spin-off Subsidiary Reason iriver Enterprise Ltd. Transferred to spin-off iriver China Co., Ltd. Transferred to spin-off Dongguan iriver Electronics Co., Ltd. Transferred to spin-off LIFE DESIGN COMPANY Inc. Transferred to spin-off Studio Dolphin Co., Ltd. Transferred to spin-off SKinfosec Information Technology(Wuxi) Co., Ltd. Transferred to spin-off CAPSTEC Co., Ltd. Transferred to spin-off CAPS America, Inc. Transferred to spin-off Id Quantique LLC Transferred to spin-off FSK L&S (Shanghai) Co., Ltd. Transferred to spin-off FSK L&S (Hungary) Co., Ltd. Transferred to spin-off FSK L&S VIETNAM COMPANY LIMITED Transferred to spin-off FSK L&S (Jiangsu) Co., Ltd. Transferred to spin-off Infra Communications Co., Ltd. Transferred to spin-off Mindknock Co., Ltd. Transferred to spin-off YLP Inc. Transferred to spin-off GOOD SERVICE Co., Ltd. Transferred to spin-off (5) The financial information of significant non-controlling (In millions of won) SK Broadband Ownership of non-controlling 24.9 As of Current assets ￦ 1,208,535 Non-current 4,762,970 Current liabilities (1,410,823 ) Non-current (1,681,014 ) Net assets 2,879,668 Fair value adjustment and others (23,000 ) Net assets on the consolidated financial statements 2,856,668 Carrying amount of non-controlling 725,540 2021 Revenue ￦ 4,058,997 Profit for the year 213,468 Depreciation of the fair value adjustment and others — Profit for the year on the consolidated financial statements 213,468 Total comprehensive income 224,107 Profit attributable to non-controlling 53,645 Net cash provided by operating activities ￦ 1,064,638 Net cash used in investing activities (624,191 ) Net cash used in financing activities (237,241 ) Effects of exchange rate changes on cash and cash equivalents (59 ) Net increase in cash and cash equivalents 203,147 Dividends paid to non-controlling ￦ — (In millions of won) DREAMUS One Store Co., Ltd. Eleven Street Co., Ltd. SK Shieldus ADT CAPS Incross Co., Ltd. SK Broadband Ownership of non-controlling 48.6 47.4 18.2 37.4 55.2 24.9 As of December 31, 2020 Current assets ￦ 146,278 215,672 896,828 306,520 165,668 1,179,743 Non-current 26,165 27,770 102,397 2,620,876 13,640 4,586,065 Current liabilities (72,762 ) (96,139 ) (508,427 ) (417,194 ) (101,065 ) (1,279,132 ) Non-current (3,880 ) (3,804 ) (34,107 ) (2,133,742 ) (3,713 ) (1,840,357 ) Net assets 95,801 143,499 456,691 376,460 74,530 2,646,319 Fair value adjustment and others — — (14,297 ) (1,227,442 ) — — Net assets on the consolidated financial statements 95,801 143,499 442,394 (850,982 ) 74,530 2,646,319 Carrying amount of non-controlling 47,452 68,573 81,754 (318,267 ) 46,010 665,020 2020 Revenue ￦ 226,329 155,218 545,556 1,327,150 39,440 3,713,021 Profit (loss) for the year (23,068 ) 1,952 (29,623 ) 14,227 12,307 150,694 Depreciation of the fair value adjustment and others — — (492 ) (19,229 ) — — Profit (loss) for the year on the consolidated financial statements (23,068 ) 1,952 (30,115 ) (5,002 ) 12,307 150,694 Total comprehensive income (loss) (22,740 ) 2,278 (15,793 ) (3,758 ) 12,145 151,417 Profit (loss) attributable to non-controlling (10,770 ) 930 (5,565 ) (12,432 ) 7,568 27,240 Net cash provided by operating activities ￦ 15,223 38,006 65,499 248,524 24,629 1,035,474 Net cash used in investing activities (2,471 ) (62,816 ) (71,644 ) (229,130 ) (2,284 ) (844,454 ) Net cash provided by (used in) financing activities (2,329 ) (2,499 ) (18,059 ) 11,134 (4,278 ) (93,259 ) Effects of exchange rate changes on cash and cash equivalents (2,053 ) — (385 ) (554 ) — — Net increase (decrease) in cash and cash equivalents 8,370 (27,309 ) (24,589 ) 29,974 18,067 97,761 Dividends paid to non-controlling interests for the year ended December 31, 2020 ￦ — — 5,000 17,273 — — (*) The condensed financial information of SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) includes profit and loss, cash flows which Life Security & Holdings Co., Ltd. recognized prior to the merger. (In millions of won) DREAMUS One Store Eleven Street Life & Security Incross Co., Ltd. Ownership of non-controlling interests (%) 48.6 47.3 18.2 45.0 65.4 As of December 31, 2019 Current assets ￦ 136,269 208,527 779,568 126,437 133,741 Non-current 35,317 27,802 143,856 2,513,344 10,522 Current liabilities (49,776 ) (88,842 ) (420,022 ) (279,403 ) (77,530 ) Non-current (3,893 ) (4,783 ) (26,410 ) (2,051,517 ) (989 ) Net assets 117,917 142,704 476,992 308,861 65,744 Fair value adjustment and others — — (18,805 ) (1,219,701 ) — Net assets on the consolidated financial statements 117,917 142,704 458,187 (910,840 ) 65,744 Carrying amount of non- controlling interests 57,175 67,742 84,673 (409,878 ) 41,074 2019 Revenue ￦ 196,961 135,116 530,489 913,301 19,787 Profit (loss) for the year (48,006 ) (5,415 ) (5,077 ) 12,703 5,756 Depreciation of the fair value adjustment and others — — (614 ) (14,913 ) — Profit (loss) for the year on the consolidated financial statements (48,006 ) (5,415 ) (5,691 ) (2,210 ) 5,756 Total comprehensive income (loss) (47,971 ) (5,856 ) (13,590 ) (5,413 ) 5,396 Profit (loss) attributable to non-controlling (23,281 ) (2,256 ) (1,064 ) (978 ) 3,630 Net cash provided by (used in) operating activities ￦ (1,387 ) 14,426 7,980 238,378 (9,331 ) Net cash provided by (used in) investing activities (2,596 ) (87,275 ) 102,366 (194,472 ) 5,053 Net cash provided by (used in) financing activities (2,965 ) 96,189 (72,686 ) (51,129 ) (4,644 ) Effects on exchange rate changes on cash and cash equivalents 197 2 35 — — Net increase (decrease) in cash and cash equivalents (6,751 ) 23,342 37,695 (7,223 ) (8,922 ) Dividend paid to non- controlling interests for ￦ — — 17,500 28,786 —

Basis of Preparation

Basis of Preparation	12 Months Ended
	Dec. 31, 2021
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Basis of Preparation	2. Basis of Preparation (1) Statement of compliance These consolidated financial statements were prepared in accordance with International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board (“IASB”). These consolidated financial statements were authorized for issue by the Board of Directors on February 8, 2022 for statutory shareholders’ approval purpose, and re-authorized 8 (2) Basis of measurement The consolidated financial statements have been prepared on the historical cost basis, except for the following material items in the consolidated statement of financial position: • derivative financial instruments measured at fair value; • financial instruments measured at fair value through profit or loss (“FVTPL”); • financial instruments measured at fair value through other comprehensive income (“FVOCI”); • liabilities (assets) for defined benefit plans recognized at the total present value of defined benefit obligations less the net of the fair value of plan assets (3) Functional and presentation currency Financial statements of Group entities within the Group are prepared in functional currency of each group entity, which is the currency of the primary economic environment in which each entity operates. Consolidated financial statements of the Group are presented in Korean won, which is the Parent Company’s functional and presentation currency. (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 prospectively 1) Critical judgments Information about critical judgments in applying accounting policies that have the most significant effects on the amounts recognized in the consolidated financial statements is included in notes for the following areas: consolidation (whether the Group has de facto control over an investee), and determination of stand-alone selling prices. 2) Assumptions and estimation uncertainties Information about assumptions and estimation uncertainties that have a significant risk of resulting in a material adjustment within the next financial year are included in the following notes: loss allowance (notes 6 and 35), estimated useful lives of costs to obtain a contract (notes 7), property and equipment and intangible assets (notes 3 (7), (9), 13 and 17), impairment of goodwill (notes 3 (12) and 16), recognition of provision (notes 3 (17) and 20), measurement of defined benefit liabilities (notes 3 (16) and 21), transaction of derivative instruments (notes 3 (6) and 22) and recognition of deferred tax assets (liabilities) (notes 3 (25) and 31). 3) Fair value measurement A number of the Group’s accounting policies and disclosures require the measurement of fair values, for both financial and non-financial The Group regularly reviews significant unobservable inputs and valuation adjustments. If third party information, such as broker quotes or pricing services, is used to measure fair values, then the Group 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 valuations should be classified. When measuring the fair value of an asset or a liability, the Group 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. • Level 1: quoted prices (unadjusted) in active markets for identical assets or liabilities; • Level 2: inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices); and • Level 3: inputs for the asset or liability that are not based on observable market data (unobservable inputs). If the inputs used to measure the fair value of an asset or a liability fall into 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 Group recognizes transfers between levels of the fair value hierarchy at the end of the reporting period during which the change has occurred. Information about assumptions used for fair value measurements are included in note 22 and note 35.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
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Significant Accounting Policies	3. Significant Accounting Policies The significant accounting policies applied by the Group in the preparation of its consolidated financial statements in accordance with IFRS are included below. The significant accounting policies applied by the Group in these consolidated financial statements have been consistently applied for all periods presented, except for the changes described below. The Group has initially adopted Interest Rate Benchmark Reform Phase 2 — Amendments to IFRS 9, Financial Instruments Financial Instrument: Recognition and Measurement Financial Instruments: Disclosures Leases Interest Rate Benchmark Reform Phase 2 — Amendments provide exceptions as follows: • when the basis of determining the contractual cash flows of a financial asset or financial liability measured at amortized cost changed as a result of interest rate benchmark reform (“IBOR reform”), the Group updates the effective interest rate of the financial asset or financial liability rather than the carry amount and, • when the basis for determining the contractual cash flows of the hedged item or hedging instrument changes as a result of the IBOR reform, the exception permits the hedge relationship to be continued while the Group amends the hedge documentation of that hedging relationship to reflect the changes required by IBOR reform. These amended standards are not expected to have a significant impact on the Group’s consolidated financial statements. Meanwhile, as described in note 41, the Parent Company carried out spin-off Non-current (1) Operating segments An operating segment is a component of the Group that engages in business activities from which it may earn revenues and incur expenses, including revenues and expenses that relate to transactions with any of the Group’s other components. The Group’s operating segments have been determined to be each business unit, for which the Group generates separately identifiable financial information that is regularly reported to the chief operating decision maker for the purpose of resource allocation and assessment of segment performance. The Group has three reportable segments as described in note 4. Segment results that are reported to the chief operating decision maker include items directly attributable to a segment as well as those that can be allocated on a reasonable basis. (2) Basis of consolidation (a) Business combination A business combination is accounted for by applying the acquisition method, unless it is a combination involving entities or businesses under common control. In determining whether a particular set of activities and assets is a business, the Group assesses whether the set of assets and activities acquired includes, at a minimum, an input and substantive process and whether the acquired set has the ability to produce outputs. The Group has an option to apply a ‘concentration test’ that permits a simplified assessment of whether an acquired set of activities and assets is not a business. The optional concentration test is met if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. Consideration transferred is generally measured at fair value, identical to the measurement of identifiable net assets acquired at fair value. The difference between the acquired company’s fair value and the consideration transferred is accounted for goodwill. Any goodwill that arises is tested annually for impairment. Any gain on a bargain purchase is recognized in profit or loss immediately. Acquisition-related costs are expensed in the periods in which the costs are incurred and the services are received, except if related to the costs to issue debt or equity securities recognized based on IAS 32 and IFRS 9. Consideration transferred does not include the amount settled in relation to the pre-existing Contingent consideration is measured at fair value at the acquisition date. Contingent consideration classified as equity is not remeasured and its subsequent settlement is accounted for within equity. If contingent consideration is not classified as equity, the Group subsequently recognizes changes in fair value of contingent consideration through profit or loss. (b) Non-controlling Non-controlling Changes in a Controlling Company’s ownership interest in a subsidiary that do not result in the Controlling Company losing control of the subsidiary are accounted for as equity transactions. (c) Subsidiaries Subsidiaries are entities controlled by the Group. The Group controls an investee when it is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. Consolidation of an investee begins from the date the Group obtains control of the investee and cease when the Group loses control of the investee. (d) Loss of control If the Group loses control of a subsidiary, the Group derecognizes the assets and liabilities of the former subsidiary from the consolidated statement of financial position and recognizes gain or loss associated with the loss of control attributable to the former controlling interest. Any investment retained in the former subsidiary is recognized at its fair value when control is lost. (e) Interest in investees accounted for using the equity method Interest in investees accounted for using the equity method composed of interest in associates and joint ventures. An associate is an entity in which the Group has significant influence, but not control, over the entity’s financial and operating policies. A joint venture is a joint arrangement whereby the Group that has joint control of the arrangement has rights to the net assets of the arrangement. The investment in an associate and a joint venture is initially recognized at cost including transaction costs and the carrying amount is increased or decreased to recognize the Group’s share of the profit or loss and changes in equity of the associate or the joint venture after the date of acquisition. (f) Intra-group transactions Intra-group balances and transactions, and any unrealized income and expenses arising from intra-group transactions, are eliminated in preparing the consolidated financial statements. The Group’s share of unrealized gain incurred from transactions with investees accounted for using the equity method are eliminated and unrealized loss are eliminated using the same basis if there are no evidence of asset impairments. (g) Business combinations under common control SK Inc. is the ultimate controlling entity of the Group. The assets and liabilities acquired under business combination under common control are recognized at the carrying amounts in the ultimate controlling shareholder’s consolidated financial statements. The difference between consideration and carrying amount of net assets acquired is added to or subtracted from capital surplus and others. (3) Cash and cash equivalents Cash and cash equivalents comprise cash balances, call deposits and investment securities with maturities of three months or less from the acquisition date that are easily convertible to cash and subject to an insignificant risk of changes in their fair value. (4) Inventories Inventories are initially recognized at the acquisition cost and subsequently measured using the weighted average method. During the period, a perpetual inventory system is used to track inventory quantities, which is adjusted based on the physical inventory counts performed at the period end. When the net realizable value of inventories is less than cost, the carrying amount is reduced to the net realizable value, and any difference is charged to current period as operating expenses. (5) Non-derivative (a) Recognition and initial measurement Accounts receivable — trade and debt investments issued are initially recognized when they are originated. All other financial assets and financial liabilities are initially recognized when the Group becomes a party to the contractual provisions of the instrument. A financial asset (unless an accounts receivable — trade without a significant financing component) or financial liability is initially measured at fair value plus, for an item not at FVTPL, transaction costs that are directly attributable to its acquisition or issue. An accounts receivable — trade without a significant financing component is initially measured at the transaction price. (b) Classification and subsequent measurement On initial recognition, a financial asset is classified as measured at: • FVTPL • FVOCI — equity investment • FVOCI — debt investment • Financial assets at amortized cost A financial asset is classified based on the business model in which a financial asset is managed and its contractual cash flow characteristics. Financial assets are not reclassified subsequent to their initial recognition unless the Group changes its business model for managing financial assets, in which case all affected financial assets are reclassified on the first day of the first reporting period following the change in the business model. A financial asset is measured at amortized cost if it meets both of the following conditions and is not designated as at FVTPL: • it is held within a business model whose objective is to hold assets to collect contractual cash flows; and • its contractual terms give rise to cash flows that are solely payments of principal and interest on the principal amount outstanding on specified dates. A debt investment is measured at FVOCI if it meets both of the following conditions and is not designated as at FVTPL: • it is held within a business model whose objective is achieved by both collecting contractual cash flows and selling financial assets; and • its contractual terms give rise to cash flows that are solely payments of principal and interest on the principal amount outstanding on specified dates. On initial recognition of an equity investment that is not held for trading, the Group may irrevocably elect to present subsequent changes in the investment’s fair value in other comprehensive income (“OCI”). This election is made on an investment-by-investment All financial assets not classified as measured at amortized cost or FVOCI as described above are measured at FVTPL. This includes all derivative financial assets. On initial recognition, the Group may irrevocably designate a financial asset that otherwise meets the requirements to be measured at amortized cost or at FVOCI as at FVTPL if doing so eliminates or significantly reduces an accounting mismatch that would otherwise arise. The following accounting policies are applied to the subsequent measurement of financial assets. Financial assets at FVTPL These assets are subsequently measured at fair value. Net gains and losses, including any interest or dividend income, are recognized in profit or loss. Financial assets at amortized cost These assets are subsequently measured at amortized cost using the effective interest method. The amortized cost is reduced by impairment losses. Interest income, foreign exchange gains and losses and impairment are recognized in profit or loss. Any gain or loss on derecognition is recognized in profit or loss. Debt investments at FVOCI These assets are subsequently measured at fair value. Interest income calculated using the effective interest method, foreign exchange gains and losses and impairment are recognized in profit or loss. Other net gains and losses are recognized in OCI. On derecognition, gains and losses accumulated in OCI are reclassified to profit or loss. Equity investments at FVOCI These assets are subsequently measured at fair value. Dividends are recognized as income in profit or loss unless the dividend clearly represents a recovery of the cost of the investment. Other net gains and losses are recognized in OCI and are never reclassified to profit or loss. (c) Impairment The Group estimates the expected credit losses (“ECL”) for the debt instruments measured at amortized cost and FVOCI based on the Group’s historical experience and informed credit assessment that includes forward-looking information. The impairment approach is decided based on the assessment of whether the credit risk of a financial asset has increased significantly since initial recognition. However, the Group applies a practical expedient and recognizes impairment losses equal to lifetime ECLs for accounts receivable – trade and lease receivables from the initial recognition. ECL is a probability-weighted estimate of credit losses. Credit losses are measured as the present value of all cash shortfalls (i.e. the difference between the cash flows due to the entity in accordance with the contract and the cash flows that the Group expects to receive). At each reporting date, the Group assesses whether financial assets measured at amortized cost and debt investments at FVOCI are credit-impaired. A financial asset is ‘credit-impaired’ when one or more events that have a detrimental impact on the estimated future cash flows of the financial asset have occurred. Loss allowance on financial assets measured at amortized cost is deducted from the carrying amount of the respective assets, while loss allowance on debt instruments at FVOCI is recognized in OCI, instead of reducing the carrying amount of the transferred assets. (d) Derecognition Financial assets The Group 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 either: • substantially all of the risks and rewards of ownership of the financial asset are transferred; or • the Group neither transfers nor retains substantially all of the risks and rewards of ownership and it does not retain control of the financial asset. The Group 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. Interest rate benchmark reform When the basis for determining the contractual cash flows of a financial asset or financial liability measured at amortized cost changed as a result of interest rate benchmark reform, the Group updated the effective interest rate of the financial asset or financial liability to reflect the change that is required by the reform. A change in the basis for determining the contractual cash flows is required by interest rate benchmark reform if the following conditions are met: • the change is necessary as a direct consequence of the reform; and • the new basis for determining the contractual cash flows is economically equivalent to the previous basis – i.e. the basis immediately before the change. When changes were made to a financial asset or financial liability in addition to changes to the basis for determining the contractual cash flows required by interest rate benchmark reform, the Group first updated the effective rate of the financial asset or financial liability to reflect the change that is required by interest rate benchmark reform. After that, the Group applied the policies on accounting for modifications to the additional changes. (e) Offsetting Financial assets and financial liabilities are offset, and the net amount is presented in the statement of financial position when the Group currently has a legally enforceable right to offset the recognized amounts and it intends either to settle on a net basis or to settle the liability and realize the asset simultaneously. A financial asset and a financial liability are offset only when the right to set off the amount is not contingent on future event and legally enforceable even on the event of default, insolvency or bankruptcy. (6) Derivative financial instruments, including hedge accounting Derivatives are initially recognized at fair value. Subsequent to initial recognition, derivatives are measured at fair value at the end of each reporting period, and changes therein are accounted for as described below. (a) Hedge accounting The Group holds forward exchange contracts, interest rate swaps, currency swaps and other derivative contracts to manage interest rate risk and foreign exchange risk. The Group designates derivatives as hedging instruments to hedge the variability in cash flow associated with highly probable forecasted transactions or firm commitments (a cash flow hedge). On initial designation of the hedge, the Group formally documents the relationship between the hedging instrument(s) and hedged item(s), including the risk management objectives and strategy in undertaking the hedge transaction, together with the methods that will be used to assess the effectiveness of the hedging relationship. Hedges directly affected by interest rate benchmark reform When uncertainty arises about the interest rate benchmark designated as a hedged risk and the timing or the amount of the interest rate benchmark-based For a cash flow hedge of a forecast transaction, the Group assumes that the benchmark interest rate will not be altered as a result of interest rate benchmark reform for the purpose of assessing whether the forecast transaction is highly probable and determining whether a previously designated forecast transaction in a discontinued cash flow hedge is still expected to occur. The Group will cease applying the specific policy for assessing the economic relationship between the hedged item and the hedging instrument • to a hedged item or hedging instrument when the uncertainty arising from interest rate benchmark reform is no longer present with respect to the timing and the amount of the interest rate benchmark-based • when the hedging relationship is discontinued. When the basis for determining the contractual cash flows of the hedged item or hedging instrument changes as a result of IBOR reform and therefore there is no longer uncertainty arising about the cash flows of the hedged item or the hedging instrument, the Group amends the hedge documentation of that hedging relationship to reflect the change(s) required by IBOR reform. The Group amends the formal hedge documentation by the end of the reporting period during which a change required by IBOR reform is made to the hedged risk, hedged item or hedging instrument. These amendments in the formal hedge documentation do not constitute the discontinuation of the hedging relationship or the designation of a new hedging relationship. If changes are made in addition to those changes required by interest rate benchmark reform to the financial asset or financial liability designated in a hedging relationship or to the designation of the hedging relationship, the Group determines whether those additional changes result in the discontinuation of hedging accounting. If the additional changes do not result in the discontinuation of hedging accounting, the Group amend the formal designation of the hedging relationship. When the interest rate benchmark on which the hedged future cash flows had been based is changed as required by IBOR reform, for the purpose of determining whether the hedged future cash flows are expected to occur, the Group deems that the hedging reserve recognized in OCI for that hedging relationship is based on the alternative benchmark rate on which the hedged future cash flows will be based. Cash flow hedge When a derivative is designated to hedge the variability in cash flows attributable to a particular risk associated with a recognized asset or liability or a highly probable forecasted transaction that could affect profit or loss, the effective portion of changes in the fair value of the derivative is recognized in other comprehensive income, net of tax, and presented in the hedging reserve in equity. Any ineffective portion of changes in the fair value of the derivative is recognized immediately in profit or loss. If the hedging instrument no longer meets the criteria for hedge accounting, expires or is sold, terminated, exercised, or the designation is revoked, then hedge accounting is discontinued prospectively. The cumulative gain or loss on the hedging instrument that has been recognized in other comprehensive income is reclassified to profit or loss in the periods during which the forecasted transaction occurs. If the forecasted transaction is no longer expected to occur, then the balance in other comprehensive income is recognized immediately in profit or loss. (b) Other derivative financial instruments Other derivative financial instrument not designated as a hedging instrument are measured at fair value, and the changes in fair value of the derivative financial instrument is recognized immediately in profit or loss. (7) Property and equipment Property and equipment are initially measured at cost. The cost of property 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. Property and equipment, subsequently, are carried at cost less accumulated depreciation and accumulated impairment losses. Subsequent costs are recognized in the carrying amount of property and equipment at cost or, if appropriate, as a separate item if it is probable that future economic benefits associated with the item will flow to the Group and the cost of the item can be reliably measured. The carrying amount of the replaced part is derecognized. The costs of the day-to-day Property 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. A component that is significant compared to the total cost of property and equipment is depreciated over its separate useful life. Gains and losses on disposal of an item of property and equipment are determined by comparing the proceeds from disposal with the carrying amount of property and equipment and are recognized as other non-operating The estimated useful lives of the Group’s property and equipment are as follows: Useful lives (years) Buildings and structures 15 ~ 40 Machinery 3 ~ 15, 30 Other property and equipment 3~10 Right-of-use 1 ~ 50 Depreciation methods, useful lives, and residual values are reviewed at the end of each reporting date and adjusted, if appropriate. The change is accounted for as a change in an accounting estimate. (8) Borrowing costs The Group 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. Financial assets are not qualifying assets, and assets that are ready for their intended use or sale when acquired are not qualifying assets either. To the extent that the Group borrows funds specifically for the purpose of obtaining a qualifying asset, the Group determines the amount of borrowing costs eligible for capitalization as the actual borrowing costs incurred on that borrowing during the period less any investment income on the temporary investment of those borrowings. To the extent that the Group borrows funds generally and uses them for the purpose of obtaining a qualifying asset, the Group determines the amount of borrowing costs eligible for capitalization by applying a capitalization rate to the expenditures on that asset. The capitalization rate is the weighted average of the borrowing costs applicable to the borrowings of the Group that are outstanding during the period other than borrowings made specifically for the purpose of obtaining a qualifying asset. The amount of borrowing costs that the Group capitalizes during a period do not exceed the amount of borrowing costs incurred during the period. (9) Intangible assets Intangible assets are measured initially at cost and, subsequently, are carried at cost less accumulated amortization and accumulated impairment losses. Intangible assets, except for goodwill, are amortized on a straight-line basis over the estimated useful lives of intangible assets from the date that they are available for use. The residual value of intangible assets is zero. However, club memberships and brand are expected to be available for use as there are no foreseeable limits to the periods. These intangible assets are determined as having indefinite useful lives and, therefore, not amortized. The estimated useful lives of the Group’s intangible assets are as follows: Useful lives (years) Frequency usage rights 2.9 ~ 10 Land usage rights 5 Industrial rights 5, 10 Development costs 5 Facility usage rights 10, 20 Customer relations 3 ~ 15 Other 3 ~ 20 Amortization periods and the amortization methods for intangible assets with finite useful lives are reviewed at the end of each reporting period. The useful lives of intangible assets that are not being amortized are reviewed at the end of each reporting period to determine whether events and circumstances continue to support indefinite useful life assessments for those assets. Changes, if appropriate, are accounted for as changes in accounting estimates. Expenditures on research activities are recognized in profit or loss as incurred. Development expenditures are capitalized only if development costs can be reliably measured, the product or process is technically and commercially feasible, future economic benefits are probable, and the Group intends to and has sufficient resources to complete development and to use or sell the asset. Other development expenditures are recognized in profit or loss as incurred. Subsequent expenditures are capitalized only when they increase the future economic benefits embodied in the specific asset to which it relates. All other expenditures, including expenditures on internally generated goodwill and brands, are recognized in profit or loss as incurred. (10) Government grants Government grants are not recognized unless there is reasonable assurance that the Group will comply with the grant’s conditions and that the grant will be received. 1) Grants related to assets Government grants whose primary condition is that the Group purchases, constructs, or otherwise acquires a long-term asset 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 reduction to depreciation expense. 2) Grants related to income Government grants which are intended to compensate the Group for expenses incurred are deducted from the related expenses. (11) Investment property Investment properties are properties held to earn rentals and/or for capital appreciation. Investment properties are measured initially at cost, including transaction costs. Subsequent to initial recognition, investment properties are reported at cost less accumulated depreciation and accumulated impairment losses. Subsequent expenditures are recognized in carrying amount of an asset or as a separate asset if it is probable that future economic benefits associated with the assets will flow into the Group and the cost of an asset can be measured reliably. The carrying amount of those parts that are replaced is derecognized. The costs associated with routine maintenance and repairs are recognized in profit or loss as incurred. Investment property, except for land, is depreciated on a straight-line basis over estimated useful lives of 30 years. In addition, right-of-use straight-line The depreciation method, estimated useful lives and residual values are reviewed at the end of each reporting date and adjusted, if appropriate. The change is accounted for as a change in an accounting estimate. (12) Impairment of non-financial The carrying amounts of the Group’s non-financial non-current The Group estimates the recoverable amount of an individual asset, and if it is impossible to measure the individual recoverable amount of an asset, the Group estimates the recoverable amount of cash-generating unit (“CGU”). A CGU is the smallest identifiable group of assets that generates cash inflows that are largely independent of the cash inflows from other assets or groups of assets. The recoverable amount of an asset or CGU is the greater of its value in use and its fair value less costs to sell. The value in use is estimated by applying a pre-tax An impairment loss is recognized in profit or loss to the extent the carrying amount of the asset exceeds its recoverable amount. Goodwill acquired in a business combination is allocated to each CGU that is expected to benefit from the synergy arising from the business acquired. Any impairment identified at the CGU level will first reduce the carrying amount 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. (13) Leases A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. (a) As a lessee At commencement or on modification of a contract that contains a lease component, the Group allocates the consideration in the contract to each lease component on the basis of its relative stand-alone prices. However, the Group has elected not to separate non-lease non-lease The Group recognizes a right-of-use right-of-use The right-of-use straight-line right-of-use right-of-use right-of-use The lease liability is initially measured at the present value of the lease payments that are not paid at the commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be readily determined, the Group’s incremental borrowing rate. Generally, the Group uses its incremental borrowing rate as the discount rate. The Group determines its incremental borrowing rate by obtaining interest rates from various external financing sources and makes certain adjustments to reflect the terms of the lease and type of the asset leased. Lease payments included in the measurement of the lease liability comprise the following: • fixed payments, including in-substance • variable lease payments that depend on an index or a rate, initially measured using the index or rate as at the commencement date • amounts expected to be payable under a residual value guarantee • the exercise price under a purchase option that the Group is reasonably certain to exercise, lease payments in an optional renewal period if the Group is reasonably certain to exercise an extension option, and penalties for early termination of a lease unless the Group is reasonably certain not to terminate early. The lease liability is measured at amortized cost using the effective interest method. It is remeasured when there is a change in future lease payments arising from a change in an index or rate, if there is a change in the Group’s estimate of the amount expected to be payable under a residual value guarantee, if the Group changes its assessment of whether it will exercise a purchase, extension or termination option or if there is a revised in-substance When the lease liability is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right-of-use right-of-use The Group presents right-of-use The Group has elected not to recognize right-of-use low-value straight-line (b) As a lessor At inception or on modification of a contract that contains a lease component, the Group allocates the consideration in the contract to each lease component on the basis of their relative stand-alone prices. When the Group acts as a lessor, it determines at lease inception whether each lease is a finance lease or an operating lease. To classify each lease, the Group makes an overall assessment

Operating Segments

Operating Segments	12 Months Ended
	Dec. 31, 2021
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Operating Segments	4. Operating Segments The Group’s operating segments have been identified to be each business unit, by which the Group provides different services and merchandise. The Group’s reportable segments for continuing operations include: cellular services, which include cellular voice service, wireless data service and wireless internet services; fixed-line telecommunication services, which include telephone services, internet services, and leased line services; and all other businesses, which include providing shopping channel and digital platform for selling products and other immaterial operations, each of which does not meet the quantitative threshold to be considered as a reportable segment and are presented collectively as others. (1) Segment information for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 Continuing operations Discontinued operations Cellular services Fixed-line Others(*1) Sub-total Adjustments (*2) Total Total revenue ￦ 14,214,407 4,790,641 362,978 19,368,026 (2,619,441 ) 16,748,585 2,845,424 Inter-segment revenue 1,495,934 1,112,935 10,572 2,619,441 (2,619,441 ) — 462,341 External revenue 12,718,473 3,677,706 352,406 16,748,585 — 16,748,585 2,383,083 Depreciation and amortization 2,812,827 958,462 11,318 3,782,607 (110,052 ) 3,672,555 287,412 Operating profit (loss) 1,123,147 294,070 14,550 1,431,767 595 1,432,362 73,005 Finance income and costs, net (160,471 ) (222,406 ) Gain relating to investments in subsidiaries, associates and joint ventures, net 446,300 1,502,147 Profit before income tax 1,718,191 1,352,746 (In millions of won) 2020 Continuing operations Discontinued operations Cellular services Fixed-line telecommunication services Others(*1) Sub-total Adjustments (*2) Total Total revenue ￦ 13,853,274 4,467,863 317,065 18,638,202 (2,550,455 ) 16,087,747 3,015,563 Inter-segment revenue 1,505,311 1,035,645 9,499 2,550,455 (2,550,455 ) — 478,659 External revenue 12,347,963 3,432,218 307,566 16,087,747 — 16,087,747 2,536,904 Depreciation and amortization 2,892,460 874,562 10,675 3,777,697 (113,032 ) 3,664,665 326,417 Operating profit (loss) 1,031,887 258,973 645 1,291,505 (256,485 ) 1,035,020 69,614 Finance income and costs, net (182,258 ) (73,739 ) Gain relating to investments in subsidiaries, associates and joint ventures, net 52,456 975,947 Profit before income tax 905,218 971,822 (In millions of won) 2019 Continuing operations Cellular services Fixed-line Others(*1) Sub-total Adjustments (*2) Total Discontinued operations Total revenue ￦ 13,787,009 3,944,260 250,409 17,981,678 (2,565,247 ) 15,416,431 2,729,552 Inter-segment revenue 1,563,205 984,967 17,075 2,565,247 (2,565,247 ) — 405,267 External revenue 12,223,804 2,959,293 233,334 15,416,431 — 15,416,431 2,324,285 Depreciation and amortization 2,828,285 792,334 9,133 3,629,752 (88,768 ) 3,540,984 315,678 Operating profit (loss) 963,207 144,739 (15,095 ) 1,092,851 (105,797 ) 987,054 20,204 Finance income and costs, net (213,220 ) (82,580 ) Gain relating to investments in subsidiaries, associates 33,199 416,344 Profit before income tax 807,033 353,968 (*1) The Parent Company carried out spin-off (*2) Adjustments for operating profit (loss) are the amount differences from operating profit (loss) included in CODM report which is based on Korean IFRS to operating profit (loss) under IFRS. The reconciliation of these amounts is included in note 4-(2). The Group has restated the previously reported segment information for the years ended December 31, 2020 and 2019 to reflect reclassification of operating segments due to spin-off. (2) Reconciliation of total segment operating profit to consolidated operating profit from continuing operations for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Total segment operating profit (Before adjustments) ￦ 1,431,767 1,291,505 1,092,851 Adjustments(*1) (44,605 ) (42,927 ) (54,184 ) Total segment operating profit 1,387,162 1,248,578 1,038,667 Other operating income: Gain on disposal of property and equipment and intangible assets 39,136 34,625 7,755 Others(*2) 76,627 61,126 87,828 115,763 95,751 95,583 Other operating expenses: Impairment loss on property and equipment and intangible assets (3,135 ) (200,705 ) (42,823 ) Loss on disposal of property and equipment and intangible assets (28,158 ) (25,633 ) (23,821 ) Donations (12,800 ) (16,051 ) (16,782 ) Bad debt for accounts receivable — other (3,995 ) (6,640 ) (3,594 ) Others(*3) (22,475 ) (60,280 ) (60,176 ) (70,563 ) (309,309 ) (147,196 ) Consolidated operating profit from continuing operations ￦ 1,432,362 1,035,020 987,054 (*1) Adjustments for operating profit included the amount due to the consolidation adjustments, such as internal transactions. (*2) Others for the year ended December 31, 2020 includes ￦ ￦ (*3) Others for the years ended December 31, 2021, 2020 and 2019 include ￦ ￦ ￦ Since there are no intersegment sales of inventory, there is no unrealized intersegment profit related to sales of inventory to be eliminated on consolidation. Domestic revenue for the years ended December 31, 2021, 2020 and 2019 amounts to ￦ ￦ ￦ respectively . ￦ ￦ ￦ non-current ￦ ￦ ￦ No single customer contributed 10% or more to the Group’s total revenue for the years ended December 31, 2021, 2020 and 2019. The Group principally operates its businesses in Korea and the revenue amounts earned outside of Korea are immaterial. Therefore, no entity-wide geographical information is presented. (3) Disaggregation of operating revenues considering the economic factors that affect the amounts, timing and uncertainty of the Group’s revenue and future cash flows is as follows: (In millions of won) 2021 2020 2019 Goods and Services transferred at a point in time: Cellular revenue Goods(*1) ￦ 959,932 983,431 1,151,236 Fixed-line telecommunication revenue Goods 105,340 90,692 145,876 Other revenue Others(*2) 328,328 284,221 198,732 1,393,600 1,358,344 1,495,844 Goods and Services transferred over time: Cellular revenue Wireless service(*3) 10,100,368 9,806,719 9,538,162 Cellular interconnection 493,820 472,215 494,267 Other(*4) 1,164,353 1,085,598 1,040,139 Fixed-line telecommunication revenue Fixed-line service 217,000 230,401 225,557 Cellular interconnection 69,769 83,762 92,396 Internet Protocol Television(*5) 1,786,765 1,606,740 1,285,831 International calls 162,379 160,293 137,902 Internet service and miscellaneous(*6) 1,336,453 1,260,330 1,071,731 Other revenue Miscellaneous 24,078 23,345 34,602 15,354,985 14,729,403 13,920,587 Continuing operations 16,748,585 16,087,747 15,416,431 Discontinued operations 2,383,083 2,536,904 2,324,285 ￦ 19,131,668 18,624,651 17,740,716 (*1) Cellular revenue includes revenue from sales of handsets and other electronic accessories. (*2) Miscellaneous other revenue includes revenue from considerations received for the product sales-type data broadcasting channel use, and sales of goods through data broadcasting. (*3) Wireless service includes revenue from wireless voice and data transmission services principally derived from usage charges to wireless subscribers. (*4) Other revenue includes revenue from billing and collection services as well as other miscellaneous services. (*5) IPTV service revenue includes revenue from IPTV services principally derived from usage charges to IPTV subscribers. (*6) Internet service includes revenue from the high speed broadband internet service principally derived from usage charges to subscribers as well as other miscellaneous services.

Restricted Deposits

Restricted Deposits	12 Months Ended
	Dec. 31, 2021
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Restricted Deposits	5. Restricted Deposits Deposits which are restricted in use as of December 31, 2021 and 2020 are summarized as follows: (In millions of won) December 31, 2021 December 31, 2020 Short-term financial instruments(*) ￦ 79,500 98,057 Long-term financial instruments(*) 372 890 ￦ 79,872 98,947 (*) Financial instruments include charitable trust fund established by the Group where profits from the fund are donated to charitable institutions. As of December 31, 2021, the funds cannot be withdrawn before maturity.

Trade and Other Receivables

Trade and Other Receivables	12 Months Ended
	Dec. 31, 2021
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Trade and Other Receivables	6. Trade and Other Receivables (1) Details of trade and other receivables as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Gross amount Loss Carrying amount Current assets: Accounts receivable — trade ￦ 2,152,358 (238,847 ) 1,913,511 Short-term loans 71,750 (933 ) 70,817 Accounts receivable — other(*) 593,109 (44,747 ) 548,362 Accrued income 762 — 762 Guarantee deposits (Other current assets) 92,046 — 92,046 2,910,025 (284,527 ) 2,625,498 Non-current Long-term loans 66,431 (44,452 ) 21,979 Long-term accounts receivable — other(*) 277,116 (1,878 ) 275,238 Guarantee deposits 186,713 — 186,713 Long-term accounts receivable — trade (Other non-current 8,140 (34 ) 8,106 538,400 (46,364 ) 492,036 ￦ 3,448,425 (330,891 ) 3,117,534 (*) Gross and carrying amounts of accounts receivable – other as of December 31, 2021 include ￦ (In millions of won) December 31, 2020 Gross amount Loss Carrying amount Current assets: Accounts receivable — trade ￦ 2,453,149 (264,256 ) 2,188,893 Short-term loans 98,366 (902 ) 97,464 Accounts receivable — other(*) 1,034,119 (55,075 ) 979,044 Accrued income 3,418 (166 ) 3,252 Guarantee deposits (Other current assets) 112,733 — 112,733 3,701,785 (320,399 ) 3,381,386 Non-current Long-term loans 84,355 (44,122 ) 40,233 Long-term accounts receivable — other(*) 332,803 — 332,803 Guarantee deposits 172,774 (300 ) 172,474 Long-term accounts receivable — trade (Other non-current 25,702 (242 ) 25,460 615,634 (44,664 ) 570,970 ￦ 4,317,419 (365,063 ) 3,952,356 (*) Gross and carrying amounts of accounts receivable — other as of December 31, 2020 include ￦ (2) Changes in the loss allowance on accounts receivable — trade measured at amortized costs for (In millions of won) Beginning Impairment(*1) Write-offs(*2) Collection of written-off Business Spin-off Ending balance 2021 ￦ 264,498 31,546 (65,852 ) 14,565 878 (6,754 ) 238,881 2020 ￦ 249,501 48,625 (48,278 ) 12,771 1,879 — 264,498 (*1) Includes amounts related to discontinued operations. (*2) The Group writes off the trade and other receivables that are determined to be uncollectable due to reasons such as termination of operations or bankruptcy. (3) The Group applies the practical expedient that allows the Group to estimate the loss allowance for accounts receivable — trade at an amount equal to the lifetime expected credit losses. The expected credit losses include the forward-looking information. To make the assessment, the Group uses its historical credit loss experience over the past three years and classifies the accounts receivable — trade by their credit risk characteristics and days overdue. Details of loss allowance on accounts receivable — trade as of December 31, 2021 are as follows: (In millions of won) Less than 6 months ~ 1 year 1 ~ 3 years More than Telecommunications service revenue Expected credit loss rate 2.06 % 76.34 % 86.51 % 99.92 % Gross amount ￦ 1,364,899 46,399 132,810 26,540 Loss allowance 28,102 35,422 114,891 26,519 Other revenue Expected credit loss rate 2.44 % 43.30 % 70.77 % 89.19 % Gross amount ￦ 565,378 1,150 6,192 17,130 Loss allowance 13,789 498 4,382 15,278 As the Group is a wireless and fixed-line telecommunications service provider, the Group’s financial assets measured at amortized cost primarily consist of receivables from numerous individual customers, and, therefore, no significant credit concentration risk arises. Receivables related to other revenue mainly consist of receivables from corporate customers. The Group transacts only with corporate customers with credit ratings that are considered to be low at credit risk. In addition, the Group is not exposed to significant credit concentration risk as the Group regularly assesses their credit risk by monitoring their credit rating. While the contract assets are under the impairment requirements, no significant credit risk has been identified.

Prepaid expenses

Prepaid expenses	12 Months Ended
	Dec. 31, 2021
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Prepaid expenses	7. Prepaid expenses The Group pays commissions to its retail stores and authorized dealers, primarily for wireless and fixed-line telecommunication services. The Group capitalized certain costs associated with commissions paid to retail stores and authorized dealers to obtain new and retained customer contracts as prepaid expenses. These prepaid expenses are amortized on a straight-line basis over the periods that the Group expects to maintain its customers. (1) Details of prepaid expenses as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Current assets: Incremental costs of obtaining contracts ￦ 1,886,680 2,016,570 Others 100,823 111,779 ￦ 1,987,503 2,128,349 Non-current Incremental costs of obtaining contracts ￦ 977,236 982,952 Others 91,912 80,759 ￦ 1,069,148 1,063,711 (2) Incremental costs of obtaining contracts The amortization and impairment losses in connection with incremental costs of obtaining contracts recognized for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Amortization and impairment losses recognized(*) ￦ 2,634,134 2,418,947 2,193,333 (*) Includes amounts related to discontinued operations.

Contract Assets and Liabilities

Contract Assets and Liabilities	12 Months Ended
	Dec. 31, 2021
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Contract Assets and Liabilities	8. Contract Assets and Liabilities In case of providing both wireless telecommunication services and sales of handsets, the Group allocated the consideration based on relative stand-alone selling prices and recognized unbilled receivables from handset sales as contract assets. The Group recognized receipts in advance for prepaid telecommunications services and unearned revenue for customer loyalty programs as contract liabilities. (1) Details of contract assets and liabilities as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Contract assets: Allocation of consideration between performance obligations ￦ 118,278 148,281 Contract liabilities: Wireless service contracts 18,397 22,026 Customer loyalty programs 12,699 16,709 Fixed-line service contracts 118,525 106,916 Security services — 30,597 Others 53,346 84,348 ￦ 202,967 260,596 (2) The amount of revenue recognized for the years ended December 31, 2021 and 2020 related to the contract liabilities carried forward from the prior periods are ￦ ￦ (In millions of won) Less than 1 year 1 ~ 2 years More than 2 years Total Wireless service contracts ￦ 18,397 — — 18,397 Customer loyalty programs 10,650 1,399 650 12,699 Fixed-line service contracts 91,143 11,981 15,401 118,525 Others 46,246 2,828 4,272 53,346 ￦ 166,436 16,208 20,323 202,967

Inventories

Inventories	12 Months Ended
	Dec. 31, 2021
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Inventories	9. Inventories (1) Details of inventories as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Acquisition Write- Carrying Acquisition Write- Carrying Merchandise ￦ 204,545 (3,419 ) 201,126 172,762 (10,566 ) 162,196 Finished goods — — — 3,730 (1,879 ) 1,851 Work in process — — — 2,579 (818 ) 1,761 Raw materials — — — 11,921 (6,905 ) 5,016 Supplies 3,511 — 3,511 619 — 619 ￦ 208,056 (3,419 ) 204,637 191,611 (20,168 ) 171,443 (2) The amount of the inventory write-downs and write-off (In millions of won) 2021 2020 2019 Charged to cost of products that have been resold(*) ￦ (3,287 ) (1,560 ) 15,019 Write-off (347 ) (3,312 ) (1,101 ) (*) Includes amounts related to discontinued operations. There are no significant reversals of inventory write-downs for the periods presented. (3) Inventories recognized as operating expenses for the years ended December 31, 2021, 2020, and 2019 are ￦ ￦ ￦ Those amounts include profit or loss from discontinued operations.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Investment Securities	10. Investment Securities (1) Details of short-term investment securities as of December 31, 2021 and 2020 are as follows: (In millions of won) Category December 31, 2021 December 31, 2020 Beneficiary certificates FVTPL ￦ 5,010 150,392 (2) Details of long-term investment securities as of December 31, 2021 and 2020 are as follows: (In millions of won) Category December 31, 2021 December 31, 2020 Equity instruments FVOCI(*) ￦ 1,510,428 1,454,361 FVTPL 57,830 67,833 1,568,258 1,522,194 Debt instruments FVOCI 1,177 1,080 FVTPL 145,643 125,563 146,820 126,643 ￦ 1,715,078 1,648,837 (*) The Group designated investment s ￦ ￦ ￦ spin-off,

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Business Combinations	11. Business Combinations (1) 2021 1 Acquisition of Studio Dolphin Co., Ltd. by DREAMUS COMPANY: DREAMUS COMPANY obtained control by acquiring 10,000 shares(100%) of Studio Dolphin Co., Ltd. for the year ended December 31, 2021. The consideration transferred was ￦ ￦ ￦ ￦ Identifiable assets acquired, liabilities assumed and goodwill were transferred to spin-off (i) Summary of the acquiree Information of Acquiree Corporate name Studio Dolphin Co., Ltd. Location 3 rd Jandari-ro 7an-gil, Mapo-gu, CEO Kim, Dong-Hee Industry Music and sound recording business (ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 1,500 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 20 Accounts receivable — trade and other 31 Other assets 7 Accounts payable — trade and other (4 ) Short-term borrowings (2 ) Other liabilities (17 ) 35 III. Goodwill(I - II) ￦ 1,465 2 Acquisition of YLP Inc. by T map Mobility Co., Ltd.: T map Mobility Co., Ltd. obtained control by acquiring 168,012 shares(100%) of YLP Inc. for the year ended December 31, 2021. The consideration transferred was ￦ ￦ ￦ ￦ ￦ ￦ Identifiable assets acquired, liabilities assumed and goodwill were transferred to spin-off (i) Summary of the acquiree Information of Acquiree Corporate name YLP Inc. Location 1740, Cheongwon-ro, Pyeongtaek-si, Gyeonggi-do, CEO Lee, Hyeok-Ju Industry Freight forwarders and cargo agents (ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 55,598 Fair value of shares of T map Mobility Co., Ltd. 23,402 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 1,897 Financial instruments 4,000 Accounts receivable — trade and other, net 4,480 Property and equipment, net 431 Intangible assets, net 3,595 Other assets 325 Borrowings (1,000 ) Accounts payable — trade and other (3,542 ) Lease liabilities (327 ) Other liabilities (48 ) Deferred tax liabilities (327 ) 9,484 III. Goodwill(I - II) ￦ 69,516 3) Acquisition of Rokmedia Co., Ltd. by One Store Co., Ltd.: One Store Co., Ltd. obtained control by acquiring 60,000 shares(100%) of Rokmedia Co., Ltd. for the year ended December 31, 2021. The consideration transferred was ￦ ￦ ￦ ￦ Identifiable assets acquired, liabilities assumed and goodwill were transferred to spin-off (i) Summary of the acquiree Information of Acquiree Corporate name Rokmedia Co., Ltd. Location 3 rd Seongam-ro, Mapo-gu, CEO Kang, Jun-Gyu Jeong-Su Industry Publishing and telecommunications retail business (ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 40,000 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 719 Financial instruments 2,170 Accounts receivable — trade and other, net 1,374 Inventories 933 Other assets 3,212 Short-term loans, net 30 Property and equipment, net 792 Intangible assets, net 2,677 Accounts payable — trade and other (1,885 ) Contract liabilities (1,401 ) Borrowings (1,485 ) Provisions (385 ) Lease liabilities (56 ) Other liabilities (111 ) Deferred tax liabilities (135 ) Income tax payable (90 ) 6,359 III. Goodwill(I - II) ￦ 33,641 4) Acquisition of GOOD SERVICE Co., Ltd. by T map Mobility Co., Ltd.: T map Mobility Co., Ltd. obtained control by acquiring 2,000 shares (100%) of GOOD SERVICE Co., Ltd. for the year ended December 31, 2021. The consideration transferred was ￦ ￦ ￦ ￦ Identifiable assets acquired, liabilities assumed and goodwill were transferred to spin-off (i) Summary of the acquiree Information of Acquiree Corporate name GOOD SERVICE Co., Ltd. Location 4 th Daeheung-ro, Mapo-gu, CEO Kim, Seung-Wook Industry Surrogate driving service business and related business (ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 10,000 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 1,328 Financial instruments 116 Accounts receivable — trade and other, net 1,881 Property and equipment, net 116 Intangible assets, net 3,492 Accounts payable — trade and other (883 ) Other liabilities (85 ) Deferred tax liabilities (696 ) Lease liabilities (113 ) 5,156 III. Goodwill(I - II) ￦ 4,844 (2) 2020 1) Merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd.: On April 30, 2020, SK Broadband Co., Ltd., a subsidiary of the Parent Company, merged with Tbroad Co., Ltd., Tbroad Dongdaemun Broadcasting Co., Ltd. and Korea Digital Cable Media Center Co., Ltd. in order to strengthen the competitiveness and enhance the synergy as a comprehensive media company. The considerations transferred included shares of SK Broadband Co., Ltd. transferred based on the merger ratio and the obligations and rights pursuant to the shareholders’ agreement between the Parent Company and the acquiree’s shareholders, both measured at fair value as of April 30, 2020. The Group recognized the difference between the fair value of net assets acquired and the consideration transferred amounting to ￦ The Group’s consolidated revenue and profit for the year would have been ￦ ￦ Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Fair value of shares of SK Broadband Co., Ltd. ￦ 862,147 Fair value of derivative liability(*1) 320,984 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 110,644 Short-term financial instruments 6 Accounts receivable — trade and other 66,241 Prepaid expenses 36,324 Contract assets 14,033 Long-term investment securities 6,239 Investments in associates and joint ventures 13,637 Property and equipment, net 245,654 Intangible assets, net(*2) 423,515 Other assets 3,261 Deferred tax assets 1,296 Accounts payable — trade and other (105,179 ) Contract liabilities (1,674 ) Income tax payable (18,065 ) Provisions (2,755 ) Defined benefit liabilities (30 ) Other liabilities (15,655 ) 777,492 III. Goodwill(I - II) ￦ 405,639 (*1) The Parent Company has recognized fair value of obligations and rights in connection with the shareholders’ agreement with the acquiree’s shareholders as consideration for the business combination. (See note 22) (*2) Identifiable intangible assets recognized by the Group in the business combination included customer relationships measured at fair value on the acquisition date of ￦374,019 million. Fair value of the customer relationship was estimated based on the multi-period excess earnings method (“MPEEM”). MPEEM is a valuation technique under income approach which estimates fair value by discounting the expected future excess earnings attributable to an intangible asset using risk adjusted discount rate. The following table shows the details of valuation technique used in measuring fair values as well as the significant unobservable inputs used. Type Valuation Significant unobservable inputs Interrelationship between key unobservable fair value measurement Customer relationships MPEEM •  Estimated revenue per user •  Future churn rates •  Weighted average cost of capital (“WACC”) (7.7% for Tbroad Co., Ltd. and 8.3% for Tbroad Dongdaemun Broadcasting Co., Ltd.) •  The fair value of customer relationship will increase if expected revenue per subscriber increases and customer churn rate in the future and WACC decrease. •  The fair value of customer relationship will decrease if expected revenue per subscriber decreases and customer churn rate in the future and WACC increase. 2) Acquisition of Broadband Nowon Co.,Ltd. by the Parent Company: The Parent Company has obtained control by acquiring 627,000 shares(55%) of Tbroad Nowon Broadcasting Co., Ltd. , ￦ ￦ non-operating , ￦ ￦ (i) Summary of the acquiree Information of Acquiree Corporate name Broadband Nowon Co., Ltd. Location 21, 81gil, Dobong-ro, Gangbuk-gu, CEO Yoo, Chang-Wan Industry Cable broadcasting services (ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 10,421 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 18,106 Accounts receivable — trade and other 1,122 Property and equipment, net 1,784 Intangible assets, net 360 Other assets 595 Accounts payable — trade and other (1,351 ) Other liabilities (336 ) 20,280 III. Non-controlling 9,126 IV. Gain on bargain purchase(I - II+III) ￦ (733 ) 3) Acquisition of security equipment construction and security services business of SK hystec inc. by ADT CAPS Co., Ltd. ADT CAPS Co., Ltd., a subsidiary of the Parent Company before spin-off, ￦ ￦ ￦ ￦ Identifiable assets acquired, liabilities assumed and goodwill were transferred to spin-off Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 8,047 II. Fair value of identifiable assets acquired and liabilities assumed: Accounts receivable — trade and other 6,787 Property and equipment, net 363 Intangible assets, net 6,460 Other assets 4 Accounts payable — trade and other (5,306 ) Defined benefit liabilities (1,227 ) Deferred tax liabilities (1,554 ) Other liabilities (372 ) 5,155 III. Goodwill (I - II) ￦ 2,892 4) Merger of Life & Security Holdings Co., Ltd. by SK Infosec Co., Ltd. SK Infosec Co., Ltd., a subsidiary of the Parent Company before spin-off, (3) 2019 1) Acquisition of Incross Co., Ltd. by the Parent Company The Parent Company acquired 2,786,455 shares of Incross Co., Ltd. at ￦ other shareholders. Incross Co., Ltd. reported ￦ ￦ (i) Summary of the acquiree Information of Acquiree Corporate name Incross Co., Ltd. Location 5 th Nambusunhwan-ro, Gwanak-gu, CEO Lee, Jae-won Industry Media representative business (ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amount I. Considerations transferred: Cash and cash equivalents ￦ 53,722 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 17,400 Short-term financial instruments 24,941 Accounts receivable — trade and other 67,259 Property and equipment, net 2,411 Intangible assets, net 2,709 Other assets 9,254 Accounts payable — trade and other (57,309 ) Other liabilities (1,984 ) 64,681 III. Non-controlling 40,592 IV. Goodwill(I - II+III) ￦ 29,633

Investments in Associates and J

Investments in Associates and Joint Ventures	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Investments in Associates and Joint Ventures	12. Investments in Associates and Joint Ventures (1) Investments in associates and joint ventures accounted for using the equity method as of December 31, 2021 and 2020 are as follows: December 31, 2021 December 31, 2020 (In millions of won) Country Ownership (%) Carrying Ownership Carrying Investments in associates: SK China Company Ltd. China 27.3 ￦ 793,754 27.3 ￦ 555,133 Korea IT Fund(*1) Korea 63.3 339,976 63.3 323,294 KEB HanaCard Co., Ltd.(*2) Korea 15.0 349,866 15.0 314,930 SK Telecom CS T1 Co., Ltd.(*3) Korea — — 54.9 53,010 NanoEnTek, Inc.(*3) Korea — — 28.4 43,190 UniSK China 49.0 19,156 49.0 15,700 SK Technology Innovation Company Cayman Islands 49.0 86,301 49.0 41,579 SK MENA Investment B.V. Netherlands 32.1 15,343 32.1 14,043 SK hynix Inc.(*3) Korea — — 20.1 12,251,861 SK Latin America Investment S.A. Spain 32.1 14,004 32.1 13,930 Grab Geo Holdings PTE. LTD.(*3) Singapore — — 30.0 30,063 SK South East Asia Investment Pte. Ltd. Singapore 20.0 348,782 20.0 311,990 Pacific Telecom Inc.(*2) USA 15.0 43,789 15.0 39,723 S.M. Culture & Contents Co., Ltd.(*4) Korea 23.1 60,261 23.3 62,248 Content Wavve Co., Ltd.(*3) Korea — — 30.0 75,803 Hello Nature Co., Ltd.(*3) Korea — — 49.9 11,969 Digital Games International Pte. Ltd. Singapore 33.3 2,208 33.3 6,449 Invites Healthcare Co., Ltd.(*5) Korea 27.1 26,474 43.5 25,536 Nam Incheon Broadcasting Co., Ltd. Korea 27.3 12,525 27.3 10,902 NANO-X Israel — — 5.6 28,484 Home Choice Corp.(*2) Korea 17.8 3,052 17.8 3,585 Carrot General Insurance Co., Ltd.(*6) Korea — — 21.4 13,469 12CM JAPAN and others(*2,3,7) — — 72,605 — 65,750 2,188,096 14,312,641 Investments in joint ventures: Dogus Planet, Inc.(*3) Turkey — — 50.0 15,071 Finnq Co., Ltd.(*8) Korea 49.0 7,255 49.0 13,342 NEXTGEN BROADCAST SERVICES CO, LLC(*3) USA — — 50.0 5,850 NEXTGEN ORCHESTRATION, LLC(*3) USA — — 50.0 1,600 Techmaker GmbH(*3) Germany — — 50.0 5,609 UTC Kakao-SK Korea 48.2 2,000 — — 9,255 41,472 ￦ 2,197,351 ￦ 14,354,113 (*1) Investment in Korea IT Fund was classified as investment in associates as the Group does not have control over the investee under the contractual agreement with other shareholders. (*2) These investments were classified as investments in associates as the Group can exercise significant influence through its right to appoint the members of the Board of Directors even though the Group has less than 20% of equity interests. (*3) Investments in SK Telecom CS T1 Co., Ltd. and twenty- three spin-off (*4) The ownership interest has changed from 23.3% to 23.1% as third-party share option of S.M. Culture & Contents Co., Ltd. was exercised for the year ended December 31, 2021. (*5) The Group disposed the entire shares of SK Telecom Smart City Management Co., Ltd. to Invites Healthcare Co., Ltd. for the year ended December 31, 2020 and additionally contributed ￦ (*6) The Parent Company has entered into an agreement whereby the entire shares of Carrot General Insurance Co., Ltd. will transfer to T map Mobility Co., Ltd. In accordance with the agreement, the Parent Company reclassified the entire shares of Carrot General Insurance Co., Ltd. as non-current (*7) The Group disposed the entire shares of SK Wyverns Co., Ltd. and recognized ￦ ￦ of impairment loss for the investments in TreePay Co. Ltd., for the year ended December 31, 2021. (*8) These investments were classified as investments in joint ventures as the Group has a joint control pursuant to the agreement with the other shareholders. (*9) The Group newly invested ￦ (2) The market value of investments in listed associates as of December 31, 2021 and 2020 are as follows: (In millions of won, except for share data) December 31, 2021 December 31, 2020 Market price Number of Market value Market price per share (in won) Number of Market value NanoEnTek, Inc.(*) ￦ — — — 8,620 7,600,649 65,518 SK hynix Inc.(*) — — — 118,500 146,100,000 17,312,850 S.M. 4,485 22,033,898 98,822 1,630 22,033,898 35,915 NANO-X — — — 49,678 (USD 45.66 ) 2,607,466 129,534 (*) Investments in NanoEnTek, Inc., SK hynix Inc. and NANO-X spin-off (3) The condensed financial information of significant associates as of and for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) KEB HanaCard Co., Ltd. (*) Korea IT Fund SK China Company SK South East Asia As of December 31, 2021 Current assets ￦ 9,130,044 117,172 1,124,219 133,110 Non-current 465,333 419,632 1,849,102 2,853,184 Current liabilities 1,281,783 — 53,199 412,962 Non-current 6,284,587 — 316,470 — 2021 Revenue ￦ 1,270,568 58,741 80,241 9,945 Profit (loss) for the year 250,484 50,107 933,475 (188,678 ) Other comprehensive income (loss) 909 (6,847 ) 326,661 304,700 Total comprehensive income 251,393 43,260 1,260,136 116,022 (In millions of won) SK hynix KEB HanaCard Co., Ltd. (*) Korea IT Fund SK China Company SK South East Asia As of December 31, 2020 Current assets ￦ 16,570,953 7,910,517 107,652 380,413 797,045 Non-current 54,602,900 298,438 402,812 1,706,634 1,672,412 Current liabilities 9,072,360 897,594 — 51,025 67 Non-current 10,192,396 5,531,968 — 308,606 — 2020 Revenue ￦ 31,900,418 1,231,815 52,330 107,791 — Profit (loss) for the year 4,758,914 154,521 36,615 20,369 (158,680 ) Other comprehensive income (loss) (107,378 ) (4,283 ) 9,647 42,921 (390,851 ) Total comprehensive income (loss) 4,651,536 150,238 46,262 63,290 (549,531 ) (In millions of won) SK hynix KEB HanaCard Co., Ltd. (*) Korea IT Fund SK China Company SK South East Asia As of December 31, 2019 Current assets ￦ 14,457,602 7,974,407 113,233 615,028 81,065 Non-current 50,331,892 207,284 378,691 1,442,748 1,797,239 Current liabilities 7,874,033 1,015,657 — 59,395 94 Non-current 8,972,266 5,537,850 — 215,354 — 2019 Revenue ￦ 26,990,733 1,236,678 70,565 116,269 — Profit for the year 2,016,391 56,281 53,867 23,474 1,190 Other comprehensive income (loss) 94,023 (4,458 ) 6,132 (15,093 ) 97,508 Total comprehensive income 2,110,414 51,823 59,999 8,381 98,698 (*) The financial information of SK hynix Inc., KEB HanaCard Co., Ltd., SK China Company Ltd. and SK South East Asia Investment Pte. Ltd. are consolidated financial information. In addition, the financial information of SK hynix Inc. as of and for the year ended 2019 is financial information before the change in accounting policy in connection with the application of interpretations published by International Financial Reporting Interpretations Committee on determining lease term, as the impact on the Group’s consolidated financial statements is immaterial. (4) There are no significant joint ventures as of December 31, 2021, the condensed financial information of significant joint ventures as of and for the years ended December 31, 2020 and 2019 are as follows: (In millions of won) Dogus Planet, Inc. Finnq Co., Ltd. As of December 31, 2020 Current assets ￦ 55,951 26,781 Cash and cash equivalents 9,083 23,936 Non-current 30,408 8,530 Current liabilities 46,186 7,367 Accounts payable, other payables and provisions 28,145 5,094 Non-current 10,031 879 2020 Revenue ￦ 177,084 3,937 Depreciation and amortization (4,642 ) (4,417 ) Interest income 1,878 29 Interest expense (555 ) (51 ) Profit (loss) for the year 7,030 (19,426 ) Total comprehensive loss (1,659 ) (19,426 ) (In millions of won) Dogus Planet, Inc. Finnq Co., Ltd. As of December 31, 2019 Current assets ￦ 59,632 42,995 Cash and cash equivalents 13,422 40,619 Non-current 25,247 11,389 Current liabilities 52,238 6,756 Accounts payable, other payables and provisions 35,459 5,062 Non-current 800 1,099 2019 Revenue ￦ 136,777 1,968 Depreciation and amortization (5,487 ) (4,769 ) Interest income 1,455 12 Interest expense (92 ) (198 ) Profit (loss) for the year 9,294 (17,079 ) Total comprehensive income (loss) 9,294 (17,361 ) (5) Reconciliations of financial information of significant associates to carrying amounts of investments in associates in the consolidated financial statements as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Net assets Ownership Net assets Cost-book Carrying KEB HanaCard Co., Ltd. ￦ 2,029,007 15.0 304,351 45,515 349,866 Korea IT Fund 536,804 63.3 339,976 — 339,976 SK China Company Ltd.(*1) 2,603,336 27.3 709,961 83,793 793,754 SK South East Asia Investment Pte. Ltd.(*1) 1,743,908 20.0 348,782 — 348,782 (In millions of won) December 31, 2020 Net assets Ownership Net assets Cost-book Carrying SK hynix Inc.(*1,2) ￦ 51,883,236 20.1 11,082,048 1,169,813 12,251,861 KEB HanaCard Co., Ltd. 1,779,393 15.0 266,909 48,021 314,930 Korea IT Fund 510,464 63.3 323,294 — 323,294 SK China Company Ltd.(*1) 1,725,949 27.3 470,687 84,446 555,133 SK South East Asia Investment Pte. Ltd.(*1) 1,559,951 20.0 311,990 — 311,990 (*1) Net assets of these entities represent net assets excluding those attributable to their non-controlling (*2) The ownership interest is based on the number of shares owned by the Parent Company divided by the total shares issued by the investee company. The Group applied the equity method using the effective ownership interest which is based on the number of shares owned by the Parent Company and the investee’s total shares outstanding. The effective ownership interest applied for the equity method is 21.36%. (6) Details of the changes in investments in associates and joint ventures accounted for using the equity method for the years ended December 31, 2021 and 2020 are as follows: 2021 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Spin-off Ending Investments in associates: SK China Company Ltd.(*1) ￦ 555,133 — 274,066 95,696 (131,141 ) — 793,754 Korea IT Fund(*1) 323,294 — 31,734 (4,336 ) (10,716 ) — 339,976 KEB HanaCard Co., Ltd. 314,930 — 35,057 (121 ) — — 349,866 SK Telecom CS T1 Co., Ltd.(*2) 53,010 4,888 (8,769 ) (575 ) — (48,554 ) — NanoEnTek, Inc.(*2) 43,190 — 1,836 (86 ) — (44,940 ) — UniSK 15,700 — 1,475 1,981 — — 19,156 SK Technology Innovation Company 41,579 — 39,256 5,466 — — 86,301 SK MENA Investment B.V. 14,043 — 2 1,298 — — 15,343 SK hynix Inc.(*1,2) 12,251,861 19,482 1,542,757 197,473 (170,937 ) (13,840,636 ) — SK Latin America Investment S.A. 13,930 — (49 ) 123 — — 14,004 Grab Geo Holdings PTE. LTD.(*2) 30,063 — — — — (30,063 ) — SK South East Asia Investment Pte. Ltd. 311,990 — (18,218 ) 55,010 — — 348,782 Pacific Telecom Inc. 39,723 — 1,598 2,468 — — 43,789 S.M. Culture & Contents Co., Ltd. 62,248 144 (2,484 ) 353 — — 60,261 Contents Wavve Co., Ltd.(*2) 75,803 100,000 (20,716 ) — — (155,087 ) — Hello Nature Co., Ltd.(*2,3) 11,969 9,980 (10,899 ) (1 ) (1,730 ) (9,319 ) — Digital Games International Pte. Ltd. 6,449 — (4,529 ) 288 — — 2,208 Invites Healthcare Co., Ltd. 25,536 7,000 (5,968 ) (94 ) — — 26,474 Nam Incheon Broadcasting Co., Ltd.(*1) 10,902 — 1,759 — (136 ) — 12,525 NANO-X 28,484 (47 ) (2,049 ) — 2,437 (28,825 ) — Home Choice Corp. 3,585 — (533 ) — — — 3,052 Carrot General Insurance Co., Ltd.(*4) 13,469 12,289 (6,666 ) (358 ) (8,734 ) (10,000 ) — Bertis Inc.(*2) — 15,739 (423 ) — — (15,316 ) — UT LLC(*2) — 86,319 (7,773 ) — — (78,546 ) — SPARKPLUS Co., Ltd.(*2) — 34,166 — — — (34,166 ) — 12CM JAPAN and others(*2,5) 65,750 9,038 (2,869 ) 7,693 (1,624 ) (5,383 ) 72,605 14,312,641 298,998 1,837,595 362,278 (322,581 ) (14,300,835 ) 2,188,096 2021 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Spin-off Ending Investments in joint ventures: Dogus Planet, Inc.(*2) ￦ 15,071 — (6,990 ) (1,447 ) — (6,634 ) — Finnq Co., Ltd. 13,342 — (5,969 ) (118 ) — — 7,255 NEXTGEN BROADCAST SERVICES CO, LLC(*2) 5,850 9,048 (1,276 ) — 892 (14,514 ) — NEXTGEN ORCHESTRATION, LLC(*2) 1,600 — — — 142 (1,742 ) — Techmaker GmbH(*2) 5,609 — (94 ) 145 — (5,660 ) — WAVVE Americas Inc. (Formerly, Korea Content Platform, Inc.)(*2) — 30,191 (14 ) — 598 (30,775 ) — UTC Kakao-SK — 2,000 — — — — 2,000 41,472 41,239 (14,343 ) (1,420 ) 1,632 (59,325 ) 9,255 ￦ 14,354,113 340,237 1,823,252 360,858 (320,949 ) (14,360,160 ) 2,197,351 (*1) Dividends received from the associates are deducted from the carrying amount for the year ended December 31, 2021. (*2) Investment in SK Telecom CS T1 Co., Ltd. and twenty- three spin-off spin-off (*3) The Group recognized ￦ (*4) The Parent Company has entered into an agreement whereby the entire shares of Carrot General Insurance Co., Ltd. will transfer to T map Mobility Co., Ltd. In accordance with the agreement, the Parent Company reclassified the investments in Carrot General Insurance Co., Ltd. amounting to ￦ ￦ (*5) The acquisition for the year ended December 31, 2021 includes ￦ ￦ ￦ ￦ ￦ ￦ 2020 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Business Ending Investments in associates: SK China Company Ltd. ￦ 568,459 — 3,752 (17,078 ) — — 555,133 Korea IT Fund(*1) 311,552 — 23,189 6,110 (17,557 ) — 323,294 KEB HanaCard Co., Ltd. 294,756 — 20,671 (497 ) — — 314,930 SK Telecom CS T1 Co., Ltd.(*2) 60,305 — (7,282 ) (13 ) — — 53,010 NanoEnTek, Inc.(*2) 42,127 143 830 90 — — 43,190 UniSK(*1) 14,342 — 1,403 168 (213 ) — 15,700 SK Technology Innovation Company 43,997 — 184 (2,602 ) — — 41,579 SK MENA Investment B.V. 14,904 — — (861 ) — — 14,043 SK hynix Inc.(*1,2) 11,425,325 — 995,117 (22,481 ) (146,100 ) — 12,251,861 SK Latin America Investment S.A. 13,698 — (40 ) 272 — — 13,930 Grab Geo Holdings PTE. LTD.(*2) 31,269 — (425 ) (781 ) — — 30,063 SK South East Asia Investment Pte. Ltd. 250,034 119,770 11,250 (69,064 ) — — 311,990 Pacific Telecom Inc.(*1) 40,016 — 2,307 (1,621 ) (979 ) — 39,723 S.M. Culture & Contents Co., Ltd. 63,469 (162 ) (813 ) (246 ) — — 62,248 Contents Wavve Co., Ltd.(*2) 83,640 — (7,837 ) — — — 75,803 Hello Nature Co., Ltd.(*2,3) 13,620 9,980 (11,118 ) (79 ) (434 ) — 11,969 Digital Games International Pte. Ltd. — 8,810 (2,038 ) (323 ) — — 6,449 Invites Healthcare Co., Ltd. — 28,000 (2,645 ) 181 — — 25,536 Nam Incheon Broadcasting Co., Ltd. — — 676 — — 10,226 10,902 NANO-X — 28,515 (747 ) — 716 — 28,484 Home Choice Corp. — — 174 — — 3,411 3,585 Carrot General Insurance Co., Ltd. (*5) 6,459 31 (6,188 ) (33 ) 13,200 — 13,469 12CM JAPAN and others(*2,6) 58,884 (1,508 ) (2,134 ) (2,302 ) 12,810 — 65,750 13,336,856 193,579 1,018,286 (111,160 ) (138,557 ) 13,637 14,312,641 2020 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Business Ending Investments in joint ventures: Dogus Planet, Inc.(*2) ￦ 15,921 — 3,453 (4,303 ) — — 15,071 Finnq Co., Ltd. 22,880 — (9,538 ) — — — 13,342 NEXTGEN BROADCAST SERVICES CO, LLC(*2) 7,961 — (1,769 ) — (342 ) — 5,850 NEXTGEN ORCHESTRATION, LLC(*2) 1,646 — 57 — (103 ) — 1,600 Techmaker GmbH(*2) — 5,609 — — — — 5,609 48,408 5,609 (7,797 ) (4,303 ) (445 ) — 41,472 ￦ 13,385,264 199,188 1,010,489 (115,463 ) (139,002 ) 13,637 14,354,113 (*1) Dividends received from the associates are deducted from the carrying amount for the year ended December 31, 2020. (*2) Profit and loss related to investments in associates and joint ventures, which are transferred to the spin-off (*3) The Group recognized ￦ (*4) As the Group obtained significant influence, ￦ (*5) ￦ million of preferred shares of Carrot General Insurance Co., Ltd. were converted to common shares for the year ended December 31, 2020. (*6) The acquisitions for the year ended December 31, 2020 include ￦ ￦ ￦ ￦ ￦ KIF-Stonebridge ￦ (7) The Group discontinued the application of equity method to the following investees due to their carrying amounts being reduced to zero. The details of cumulative unrecognized equity method losses as of December 31, 2021 are as follows: (In millions of won) Unrecognized loss Unrecognized change in equity 2021 Cumulative loss 2021 Cumulative loss Wave City Development Co., Ltd. ￦ 6,143 8,543 — — Daehan Kanggun BcN Co., Ltd. and others (5,167 ) 5,780 — (124 ) ￦ 976 14,323 — (124 )

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Property and Equipment	13. Property and Equipment (1) Property and equipment as of December 31, 2021 and 2020 are as follows: December 31, 2021 (In millions of won) Acquisition cost Accumulated Accumulated Carrying Land ￦ 972,800 — — 972,800 Buildings 1,692,239 (897,336 ) (450 ) 794,453 Structures 922,637 (629,757 ) (1,601 ) 291,279 Machinery 35,770,485 (27,771,040 ) (1,518 ) 7,997,927 Other 1,718,337 (1,230,128 ) (493 ) 487,716 Right-of-use 2,229,945 (669,389 ) (1,223 ) 1,559,333 Construction in progress 767,751 — — 767,751 ￦ 44,074,194 (31,197,650 ) (5,285 ) 12,871,259 December 31, 2020 (In millions of won) Acquisition cost Accumulated Accumulated Carrying Land ￦ 1,039,323 — — 1,039,323 Buildings 1,747,445 (888,389 ) (450 ) 858,606 Structures 913,102 (594,098 ) (1,601 ) 317,403 Machinery 36,152,031 (27,761,449 ) (14,370 ) 8,376,212 Other 2,047,405 (1,391,201 ) (2,588 ) 653,616 Right-of-use 1,961,346 (489,311 ) — 1,472,035 Construction in progress 659,882 — — 659,882 ￦ 44,520,534 (31,124,448 ) (19,009 ) 13,377,077 (2) Changes in property and equipment for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 Beginning Acquisition Disposal Transfer Deprecia- Impairment(*2) Business Spin-off Ending Land ￦ 1,039,323 634 (21,557 ) 24,789 — — — (70,389 ) 972,800 Buildings 858,606 3,919 (9,706 ) 47,612 (55,818 ) — 639 (50,799 ) 794,453 Structures 317,403 2,482 (6,124 ) 16,546 (37,968 ) — — (1,060 ) 291,279 Machinery 8,376,212 593,225 (44,477 ) 1,816,003 (2,394,351 ) (1,054 ) — (347,631 ) 7,997,927 Other 653,616 830,277 (2,286 ) (607,271 ) (180,980 ) (495 ) 193 (205,338 ) 487,716 Right-of-use 1,472,035 672,723 (60,159 ) (9,610 ) (433,970 ) (1,223 ) 507 (80,970 ) 1,559,333 Construction in progress 659,882 1,695,316 (1,071 ) (1,554,047 ) — — — (32,329 ) 767,751 ￦ 13,377,077 3,798,576 (145,380 ) (265,978 ) (3,103,087 ) (2,772 ) 1,339 (788,516 ) 12,871,259 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized impairment losses for obsolete assets for the year ended December 31, 2021. (*3) Includes assets from the acquisition of YLP Inc. and another company by T map Mobility Co., Ltd. and from the acquisition of Rokmedia Co., Ltd. by One Store Co., Ltd. (In millions of won) 2020 Beginning Acquisition Disposal Transfer Deprecia- Impairment(*2) Business Ending Land ￦ 981,389 525 (20,415 ) 37,532 — — 40,292 1,039,323 Buildings 867,408 3,034 (21,811 ) 48,160 (55,215 ) — 17,030 858,606 Structures 347,069 2,542 (4,417 ) 9,167 (36,995 ) — 37 317,403 Machinery 7,924,392 553,052 (32,369 ) 2,180,445 (2,419,522 ) (1,745 ) 171,959 8,376,212 Other 731,066 945,499 (6,486 ) (817,819 ) (203,376 ) — 4,732 653,616 Right-of-use 1,326,628 736,157 (163,217 ) — (436,231 ) — 8,698 1,472,035 Construction in progress 755,508 1,625,218 (16,162 ) (1,709,735 ) — — 5,053 659,882 ￦ 12,933,460 3,866,027 (264,877 ) (252,250 ) (3,151,339 ) (1,745 ) 247,801 13,377,077 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized impairment losses for obsolete assets for the year ended December 31, 2020. (*3) Includes assets from the acquisition of Broadband Nowon Co., Ltd. and from the merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd., a subsidiary of the Parent Company.

Investment Property

Investment Property	12 Months Ended
	Dec. 31, 2021
Text Block abstract [Abstract]
Investment Property	14. Investment Property (1) Investment property as of December 31, 2021 is as follows: (In millions of won) December 31, 2021 Acquisition cost Accumulated Carrying amount Land ￦ 6,071 — 6,071 Buildings 21,021 (13,668 ) 7,353 Right-of-use 12,577 (2,967 ) 9,610 ￦ 39,669 (16,635 ) 23,034 (2) Changes in Investment property for the year ended December 31, 2021 are as follows: (In millions of won) 2021 Beginning balance ￦ — Transfer 23,034 Ending balance ￦ 23,034 (3) The Group recognized lease income of ￦ (4) The fair value of investment property is ￦

Lease

Lease	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Lease	15. Lease (1) As a lessee 1) Details of the right-of-use follows: (In millions of won) December 31, December 31, Land, buildings and structures ￦ 1,392,925 1,269,753 Others 166,408 202,282 ￦ 1,559,333 1,472,035 2) Details of amounts recognized in the consolidated statements of income for the years ended December 31, 2021, follows: (In millions of won) 2021 2020 2019 Depreciation of right-of-use Land, buildings and structures ￦ 338,304 347,166 359,755 Others 95,666 89,065 89,062 ￦ 433,970 436,231 448,817 Interest expense on lease liabilities(*) ￦ 23,998 22,976 25,981 Expenses related to short-term leases(*) 25,435 20,193 19,098 Expenses related to leases of low-value 3,772 3,297 2,550 (*) Includes amounts related to discontinued operations. 3) The total cash outflows due to lease payments for the years ended December 31, 2021, 2020 and 2019 amounted ￦ , ￦ ￦ million, respectively, those amounts include cash flows from discontinued operations. (2) As a lessor 1) Finance lease The Group recognized interest income of ￦ million, ￦ ￦ million on lease receivables for the years ended December 31, 2021, 2020 and 2019, respectively, those amounts include profit or loss from discontinued operations. The following table sets out a maturity analysis for lease receivables, presenting the undiscounted lease payments to be received subsequent to December 31, 2021. (In millions of won) Amount Less than 1 year ￦ 22,497 1 ~ 2 years 11,124 2 ~ 3 years 10,425 3 ~ 4 years 3,619 4 ~ 5 years 58 More than 5 years 6 Undiscounted lease payments ￦ 47,729 Unrealized finance income 867 Net investment in the lease 46,862 2) Operating lease The Group recognized lease income of ￦ , ￦ million and ￦ million for the years ended December 31, 2021, 2020 and 2019, respectively, of which variable lease payments received are ￦ , ￦ ￦ The following table sets out a maturity analysis of lease payments, presenting the undiscounted fixed payments to be received subsequent to December 31, 2021. (In millions of won) Amount Less than 1 year ￦ 170,575 1 ~ 2 years 113,524 2 ~ 3 years 51,433 3 ~ 4 years 1,409 4 ~ 5 years 808 More than 5 years 1,935 ￦ 339,684

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Goodwill	16. Goodwill (1) Goodwill as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Goodwill related to merger of Shinsegi Telecom, Inc. ￦ 1,306,236 1,306,236 Goodwill related to acquisition of SK Broadband Co., Ltd. 764,082 764,082 Goodwill related to acquisition of Life & Security Holdings Co., Ltd.(*) — 1,176,274 Other goodwill(*) 2,175 110,932 ￦ 2,072,493 3,357,524 (*) Transferred to the spin-off (2) Details of the impairment testing of Goodwill as of December 31, 2021 is as follows: Goodwill is allocated to the following CGUs for the purpose of impairment testing. • goodwill related to Shinsegi Telecom, Inc.(*1): Cellular services; • goodwill related to SK Broadband Co., Ltd.(*2): Fixed-line telecommunication services; and • other goodwill: Others. (*1) Goodwill related to merger of Shinsegi Telecom, Inc. The recoverable amount of the CGU is based on its value in use calculated by applying the post-tax annual discount rate of (2020: ) (pre-tax annual discount rate: 9.0%) to the estimated future post-tax cash flows based on financial budgets for the next five years. An annual growth rate of 0.5% (2020: ( - (*2) Goodwill related to acquisition of SK Broadband Co., Ltd. The recoverable amount of the CGU is based on its value in use, which is estimated based on key assumptions including operating revenue, annual growth rate applied for the cash flows expected to be incurred after five years (“perpetual growth rate”) and discount rate. The post-tax % (2020: 6.9%) (pre-tax annual discount rate : % ) to the estimated future post-tax cash flows based on financial budgets for the next five years. The estimated operating revenue is based on past performance, business plans and its expectation of future market changes. An annual growth rate of % ) was applied for the cash flows expected to be incurred after five years and is not expected to exceed the long-term fixed-line telecommunication industry growth rate. Management of the Group does not expect the total carrying amount of the CGU will exceed the total recoverable amount due to reasonably possible changes from the major assumptions used to estimate the recoverable amount. (3) Details of the changes in goodwill for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 2020 Beginning balance ￦ 3,357,524 2,949,530 Acquisition(*) 111,928 408,531 Impairment loss — (519) Other (43 ) (18 ) Spin-off (1,396,916 ) — Ending balance ￦ 2,072,493 3,357,524 (*) It consists of goodwill recognized as T map Mobility Co., Ltd.’s acquisition of YLP Inc. and another company, goodwill recognized as DREAMUS COMPANY’s acquisition of Studio Dolphin Co., Ltd. and goodwill recognized from One Store Co., Ltd.’s acquisition of Rokmedia Co., Ltd. for the year ended December 31, 2021. (See Note 11) As of December 31, 2021 and 2020, accumulated impairment losses are ￦ ￦

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Intangible Assets	17. Intangible Assets (1) Intangible assets as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Acquisition cost Accumulated Accumulated Carrying Frequency usage rights(*1) ￦ 7,221,735 (4,476,046 ) (186,000 ) 2,559,689 Land usage rights 48,318 (45,586 ) — 2,732 Industrial rights 92,332 (36,342 ) (36 ) 55,954 Development costs 34,393 (34,193 ) — 200 Facility usage rights 156,062 (138,188 ) — 17,874 Customer relations 507,581 (180,324 ) — 327,257 Club memberships(*2) 113,300 — (24,806 ) 88,494 Brands(*2) — — — — Other(*3) 4,347,971 (3,524,002 ) (6,400 ) 817,569 ￦ 12,521,692 (8,434,681 ) (217,242 ) 3,869,769 (In millions of won) December 31, 2020 Acquisition cost Accumulated Accumulated Carrying Frequency usage rights(*1) ￦ 6,210,882 (4,079,729 ) (198,388 ) 1,932,765 Land usage rights 50,503 (45,783 ) — 4,720 Industrial rights 116,889 (45,300 ) (147 ) 71,442 Development costs 67,989 (54,771 ) (3,854 ) 9,364 Facility usage rights 159,865 (137,985 ) — 21,880 Customer relations 1,091,146 (171,283 ) — 919,863 Club memberships(*2) 139,349 — (32,484 ) 106,865 Brands(*2) 374,096 — — 374,096 Other(*3) 4,604,077 (3,586,596 ) (22,282 ) 995,199 ￦ 12,814,796 (8,121,447 ) (257,155 ) 4,436,194 (*1) The Group was reassigned 800 MHz, 1.8 GHz and 2.1 GHz band of frequency license s ￦ ￦ ￦ ￦ ￦ (*2) Club memberships and Brands are classified as intangible assets with indefinite useful lives and are not amortized. (*3) Other intangible assets primarily consist of computer software and others. (2) C (In millions of won) 2021 Beginning Acquisition Disposal Transfer Amorti- Reversal (Impairment) Business tion(*3) Spin-off Ending Frequency usage rights ￦ 1,932,765 1,145,999 — — (519,075 ) — — — 2,559,689 Land usage rights 4,720 175 (76 ) — (2,087 ) — — — 2,732 Industrial rights 71,442 5,158 (8 ) 390 (6,377 ) (36 ) — (14,615 ) 55,954 Development costs 9,364 1,279 (150 ) — (3,210 ) — — (7,083 ) 200 Facility usage rights 21,880 1,690 (21 ) 328 (6,003 ) — — — 17,874 Customer relations 919,863 4,854 (461 ) — (53,342 ) — 4,705 (548,362 ) 327,257 Club memberships 106,865 6,518 (9,925 ) — — 653 — (15,617 ) 88,494 Brands 374,096 — — — — — — (374,096 ) — Other 995,199 80,713 (4,580 ) 276,890 (421,213 ) (111 ) 5,059 (114,388 ) 817,569 ￦ 4,436,194 1,246,386 (15,221 ) 277,608 (1,011,307 ) 506 9,764 (1,074,161 ) 3,869,769 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized the difference between recoverable amount and the carrying amount of intangible assets amounting to ￦ ￦ (*3) Includes assets from the acquisition of YLP Co., Ltd. and another company by T map Mobility Co., Ltd., and Rokmedia Co., Ltd. by One Store Co., Ltd. (In millions of won) 2020 Beginning Acquisition Disposal Transfer Amortization Impairment Business Ending Frequency usage rights ￦ 2,647,501 — — — (516,348 ) (198,388 ) — 1,932,765 Land usage rights 7,349 550 (100 ) — (3,079 ) — — 4,720 Industrial rights 66,824 1,836 (513 ) 8,281 (4,825 ) (161 ) — 71,442 Development costs 11,146 1,141 (294 ) 3,302 (4,644 ) (1,287 ) — 9,364 Facility usage rights 25,832 1,810 (3 ) 434 (6,193 ) — — 21,880 Customer relations 591,371 2,014 (1,604 ) 491 (52,849 ) — 380,440 919,863 Club memberships 80,410 11,821 (35,432 ) 544 — (323 ) 49,845 106,865 Brands(*4) 374,096 — — — — — — 374,096 Other 1,061,563 112,011 (13,729 ) 272,433 (430,719 ) (6,410 ) 50 995,199 ￦ 4,866,092 131,183 (51,675 ) 285,485 (1,018,657 ) (206,569 ) 430,335 4,436,194 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized the difference between recoverable amount and the carrying amount of intangible assets amounting to ￦ (*3) Includes assets from the acquisition of Broadband Nowon Co., Ltd. and from the merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd., a subsidiary of the Parent Company. (*4) Brands are recognized in connection with the acquisition of Life & Security Holdings Co., Ltd. (3) Research and development expenditures recognized as expense for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Research and development costs expensed as incurred(*) ￦ 406,672 416,445 391,327 (*) Includes amounts related to discontinued operations. (4) Details of frequency usage rights as of December 31, 2021 are as follows: (In millions of won) Amount Description Commencement Completion of 800MHz license ￦ 197,620 LTE service Ju Jun 1.8GHz license 520,100 LTE service Dec Dec 2.6GHz license 607,090 LTE service Sep Dec 2.1GHz license 390,882 W-CDMA and LTE service Dec Dec 3.5GHz license 833,034 5G service Apr Nov 28GHz license 10,963 5G service Jan Nov ￦ 2,559,689

Borrowings and Debentures

Borrowings and Debentures	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Borrowings and Debentures	18. Borrowings and Debentures (1) Short-term borrowings as of December 31, 2021 and 2020 are as follows: (In millions of won) Lender Annual interest rate (%) December 31, December 31, 2020 Short-term borrowings Citibank 2.45 ￦ — 50,000 KEB Hana Bank(*1,3) FTP 1M +1.01 — 27,000 KEB Hana Bank(*2,3) 6M financial I (bank) — 5,000 Shinhan Bank(*2,3) 6M financial I (bank) — 15,000 Hana Financial Investment Co., Ltd. 4.20 4,642 4,642 DB Financial Investment Co., Ltd. 4.00 2,785 2,785 Shinhan Financial Investment Co., Ltd. 4.20 5,571 5,571 ￦ 12,998 109,998 (*1) 1M FTP rate is 1.14% as of December 31, 2020. (*2) 6M financial I (bank) rate is 0.92% as of December 31, 2020. (*3) Transferred to the spin-off (2) Long-term borrowings as of December 31, 2021 and 2020 are as follows: (In millions of won and thousands of other currencies) Lender Annual interest rate (%) Maturity December 31, December 31, 2020 Korea Development Bank(*1) 3M CD + 0.61 Dec. 20, 2021 ￦ — 12,250 Korea Development Bank(*1,2) 3M CD + 0.71 Dec. 21, 2022 12,500 25,000 Korea Development Bank(*3) 1.87 Feb. 10, 2026 50,000 — Credit Agricole CIB(*1,4) 3M CD + 0.82 Dec. 14, 2023 25,000 37,500 Export Kreditnamnden(*5) 1.70 Apr. 29, 2022 6,746 (USD 5,690) 18,726 Shinhan Bank and others(*6) 3.20 Oct. 5, 2025 — 1,950,000 UBS(*6) 0.00 Mar. 28, — 617 (CHF 500) FAE(*6) 0.00 May 7, 2025 — 617 (CHF 500 ) Mizuho bank, Ltd. 1.35 May 20, 2024 100,000 — DBS bank Ltd. 1.32 May 28, 2024 200,000 — 394,246 2,044,710 Less present value discount (59 ) (15,786 ) 394,187 2,028,924 Less current installments (41,065 ) (49,663 ) ￦ 353,122 1,979,261 (*1) 3M CD rate are 1.29% and 0.66% as of December 31, 2021 and 2020, respectively. (*2) The long-term borrowings are to be repaid by installments on an annual basis from 2018 to 2022. (*3) The long-term borrowings are to be repaid by installments on an annual basis from 2022 to 2026. (*4) The long-term borrowings are to be repaid by installments on an annual basis from 2020 to 2023. (*5) The long-term borrowings are to be repaid by installments on an annual basis from 2014 to 2022. (*6) Transferred to the spin-off (3) Debentures as of December 31, 2021 and 2020 are as follows: (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured corporate bonds Operating fund 2021 4.22 ￦ — 190,000 Unsecured corporate bonds Operating and refinancing fund 2022 3.30 140,000 140,000 Unsecured corporate bonds 2032 3.45 90,000 90,000 Unsecured corporate bonds Operating fund 2023 3.03 230,000 230,000 Unsecured corporate bonds 2033 3.22 130,000 130,000 Unsecured corporate bonds 2024 3.64 150,000 150,000 Unsecured corporate bonds Refinancing fund 2021 2.66 — 150,000 Unsecured corporate bonds 2024 2.82 190,000 190,000 Unsecured corporate bonds Operating and refinancing fund 2022 2.40 100,000 100,000 Unsecured corporate bonds 2025 2.49 150,000 150,000 (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured corporate bonds 2030 2.61 50,000 50,000 Unsecured corporate bonds Operating fund 2025 2.66 70,000 70,000 Unsecured corporate bonds 2030 2.82 90,000 90,000 Unsecured corporate bonds Operating and refinancing fund 2025 2.55 100,000 100,000 Unsecured corporate bonds 2035 2.75 70,000 70,000 Unsecured corporate bonds Operating fund 2021 1.80 — 100,000 Unsecured corporate bonds 2026 2.08 90,000 90,000 Unsecured corporate bonds 2036 2.24 80,000 80,000 Unsecured corporate bonds 2021 1.71 — 50,000 Unsecured corporate bonds 2026 1.97 120,000 120,000 Unsecured corporate bonds 2031 2.17 50,000 50,000 Unsecured corporate bonds Refinancing fund 2022 2.17 120,000 120,000 Unsecured corporate bonds 2027 2.55 100,000 100,000 Unsecured corporate bonds Operating and refinancing fund 2032 2.65 90,000 90,000 Unsecured corporate bonds Operating and refinancing fund 2022 2.63 80,000 80,000 Unsecured corporate bonds Refinancing fund 2027 2.84 100,000 100,000 Unsecured corporate bonds 2021 2.57 — 110,000 Unsecured corporate bonds 2023 2.81 100,000 100,000 Unsecured corporate bonds 2028 3.00 200,000 200,000 Unsecured corporate bonds 2038 3.02 90,000 90,000 Unsecured corporate bonds Operating and refinancing fund 2021 2.10 — 100,000 Unsecured corporate bonds 2023 2.33 150,000 150,000 Unsecured corporate bonds 2038 2.44 50,000 50,000 Unsecured corporate bonds Operating fund 2022 2.03 180,000 180,000 Unsecured corporate bonds 2024 2.09 120,000 120,000 Unsecured corporate bonds 2029 2.19 50,000 50,000 Unsecured corporate bonds 2039 2.23 50,000 50,000 Unsecured corporate bonds Operating and refinancing fund 2022 1.40 120,000 120,000 Unsecured corporate bonds 2024 1.49 60,000 60,000 Unsecured corporate bonds 2029 1.50 120,000 120,000 Unsecured corporate bonds 2039 1.52 50,000 50,000 Unsecured corporate bonds 2049 1.56 50,000 50,000 Unsecured corporate bonds Operating fund 2022 1.69 230,000 230,000 Unsecured corporate bonds 2024 1.76 70,000 70,000 Unsecured corporate bonds 2029 1.79 40,000 40,000 Unsecured corporate bonds 2039 1.81 60,000 60,000 Unsecured corporate bonds Operating and refinancing fund 2023 1.64 170,000 170,000 Unsecured corporate bonds Operating fund 2025 1.75 130,000 130,000 Unsecured corporate bonds 2030 1.83 50,000 50,000 Unsecured corporate bonds 2040 1.87 70,000 70,000 (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured corporate bonds Refinancing fund 2025 1.40 140,000 140,000 Unsecured corporate bonds 2030 1.59 40,000 40,000 Unsecured corporate bonds 2040 1.76 110,000 110,000 Unsecured corporate bonds Refinancing fund 2024 1.17 80,000 — Unsecured corporate bonds 2026 1.39 80,000 — Unsecured corporate bonds 2031 1.80 50,000 — Unsecured corporate bonds 2041 1.89 100,000 — Unsecured corporate bonds Refinancing fund 2024 2.47 90,000 — Unsecured corporate bonds 2026 2.69 70,000 — Unsecured corporate bonds 2041 2.68 40,000 — Unsecured corporate bonds(*1) Operating and refinancing fund 2021 1.77 — 120,000 Unsecured corporate bonds(*1) Operating fund 2022 2.26 150,000 150,000 Unsecured corporate bonds(*1) Operating and refinancing fund 2022 2.70 140,000 140,000 Unsecured corporate bonds(*1) 2021 2.59 — 70,000 Unsecured corporate bonds(*1) 2023 2.93 80,000 80,000 Unsecured corporate bonds(*1) Refinancing fund 2022 2.00 50,000 50,000 Unsecured corporate bonds(*1) 2024 2.09 160,000 160,000 Unsecured corporate bonds(*1) Operating and refinancing fund 2022 1.71 80,000 80,000 Unsecured corporate bonds(*1) 2024 1.71 100,000 100,000 Unsecured corporate bonds(*1) 2026 1.86 50,000 50,000 Unsecured corporate bonds(*1) Refinancing fund 2023 1.48 100,000 100,000 Unsecured corporate bonds(*1) Operating and refinancing fund 2025 1.64 100,000 100,000 Unsecured corporate bonds(*1) Refinancing fund 2025 1.41 160,000 160,000 Unsecured corporate bonds(*1) Refinancing fund 2024 1.69 100,000 — Private placement corporate bonds(*2) Operating fund 2023 — — 6,292 Private placement corporate bonds(*2) Operating fund 2023 — — 6,222 Private placement corporate bonds(*2) Operating fund 2023 — — 6,168 Private placement corporate bonds(*2) Operating fund 2023 — — 6,100 (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured global bonds Operating fund 2027 6.63 474,200 (USD 435,200 (USD Unsecured global bonds 2023 3.75 592,750 (USD 544,000 (USD Unsecured global bonds(*1) Refinancing fund 2023 3.88 355,650 (USD 326,400 (USD Floating rate notes(*3) Operating fund 2025 3M LIBO + 0.91 355,650 (USD 326,400 (USD 8,448,250 8,606,782 Less discounts on bonds (21,567 ) (27,039 ) 8,426,683 8,579,743 Less current installments of bonds (1,389,259 ) (889,574 ) ￦ 7,037,424 7,690,169 (*1) Unsecured corporate bonds were issued by SK Broadband Co., Ltd., a subsidiary of the Parent Company. (*2) Transferred to the spin-off (*3) 3M LIBOR rates are 0.21% and 0.24% as of December 31, 2021 and 2020, respectively.

Long-term Payables - other

Long-term Payables - other	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Long-term Payables - other	19. Long-term Payables — other (1) Long-term payables — other as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Payables related to acquisition of frequency usage rights ￦ 1,611,010 1,141,723 Other — 631 ￦ 1,611,010 1,142,354 (2) As of December 31, 2021 and 2020, details of long-term payables — other which consist of payables related to the acquisition of frequency usage rights are as follows (See Note 17): (In millions of won) December 31, 2021 December 31, 2020 Long-term payables — other ￦ 2,090,715 1,626,040 Present value discount on long-term payables — other (80,882 ) (59,717 ) Current installments of long-term payables — other (398,823 ) (424,600 ) Carrying amount at December 31 ￦ 1,611,010 1,141,723 (3) The principal amounts of the long-term payables — other repaid for the year ended December 31, 2021 and 2020 are ￦ (In millions of won) Amount Less than 1 year ￦ 400,245 1~3 years 769,395 3~5 years 738,300 More than 5 years 182,775 ￦ 2,090,715

Provisions

Provisions	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Provisions	20. Provisions Changes in provisions for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 As of December 31, Beginning Increase Utilization Reversal Other Business Combination Spin-off Ending Current Non-current Provision for restoration ￦ 113,653 12,648 (6,283 ) (440 ) 172 — (5,019 ) 114,731 59,204 55,527 Emission allowance 7,424 1,368 (1,091 ) (5,816 ) — — — 1,885 1,885 — Other provisions 29,800 1,655 (18,909 ) (1,820 ) — 385 (732 ) 10,379 567 9,812 ￦ 150,877 15,671 (26,283 ) (8,076 ) 172 385 (5,751 ) 126,995 61,656 65,339 (In millions of won) 2020 As of December 31, 2020 Beginning Increase Utilization Reversal Other Business Combination Ending Current Non-current Provision for restoration ￦ 102,519 15,616 (3,610 ) (1,492 ) (6 ) 626 113,653 42,348 71,305 Emission allowance 5,257 7,400 — (5,233 ) — — 7,424 7,424 — Other provisions(*) 57,385 3,250 (30,861 ) (1,904 ) (199 ) 2,129 29,800 19,591 10,209 ￦ 165,161 26,266 (34,471 ) (8,629 ) (205 ) 2,755 150,877 69,363 81,514 (*) ￦

Defined Benefit Liabilities (As

Defined Benefit Liabilities (Assets)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Defined Benefit Liabilities (Assets)	21. Defined Benefit Liabilities (Assets) (1) Details of defined benefit liabilities (assets) as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, December 31, Present value of defined benefit obligations ￦ 1,035,016 1,278,550 Fair value of plan assets (1,040,286 ) (1,127,163 ) Defined benefit assets(*) (18,427 ) (3,557 ) Defined benefit liabilities 154,944 (*) Since the Group entities neither have legally enforceable right nor intention to settle the defined benefit obligations of Group entities with defined benefit assets of other Group entities, defined benefit assets of Group entities have been separately presented from defined benefit liabilities. (2) Principal actuarial assumptions as of December 31, 2021 and 2020 are as follows: December 31, 2021 December 31, 2020 Discount rate for defined benefit obligations 2.35 ~ 3.29% 1.83 ~ 3.14% Expected rate of salary increase 2.00 ~ 5.29% 2.04 ~ 6.00% Discount rate for defined benefit obligation is determined based on market yields of high-quality corporate bonds with similar maturities for estimated payment term of defined benefit obligation. Expected rate of salary increase is determined based on the Group’s historical promotion index, inflation rate and salary increase ratio. (3) Changes in defined benefit obligations for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) For the year ended December 31 2021 2020 Beginning balance ￦ 1,278,550 1,136,787 Current service cost(*1) 186,395 193,078 Past service cost — 815 Interest cost(*1) 28,617 25,958 Remeasurement - Demographic assumption (794 ) 2,071 - Financial assumption (29,399 ) (18,266 ) - Adjustment based on experience 5,773 17,364 Business combinations — 1,742 Benefit paid (114,897 ) (76,987 ) Spin-off (318,476 ) — Others(*2) (753 ) (4,012 ) Ending balance ￦ 1,035,016 1,278,550 (*1) Includes amounts related to discontinued operations. (*2) Others include changes of liabilities due to employee’s transfers among affiliates for the years ended December 31, 2021 and 2020. (4) Changes in plan assets for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) For the year ended December 31 2021 2020 Beginning balance ￦ 1,127,163 965,654 Interest income(*) 24,550 21,057 Remeasurement (3,798 ) (1,385 ) Contributions 152,208 213,298 Benefit paid (100,511 ) (68,084 ) Business combinations — 485 Spin-off (157,522 ) — Others (1,804 ) (3,862 ) Ending balance ￦ 1,040,286 1,127,163 (*) Includes amounts related to discontinued operations. The Group expects to contribute ￦ (5) Total cost of benefit plan, which is recognized in profit and loss (included in labor in the statement of income) and capitalized into construction-in-progress, (In millions of won) For the year ended December 31 2021 2020 Current service cost(*) ￦ 186,395 193,078 Past service cost — 815 Net interest cost(*) 4,067 4,901 ￦ 190,462 198,794 (*) Includes amounts related to discontinued operations. Costs related to the defined benefit except for the amounts transferred to construction in progress are included labor expenses and Research and development expenses. (6) Details of plan assets as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, December 31, Equity instruments ￦ 25,083 15,770 Debt instruments 228,534 228,839 Short-term financial instruments, etc. 786,669 882,554 ￦ 1,040,286 1,127,163 (7) As of December 31, 2021, effects on defined benefit obligations if each of significant actuarial assumptions changes within expectable and reasonable range are as follows: (In millions of won) 0.5% 0.5% Discount rate ￦ (43,702) 47,870 Expected salary increase rate 47,552 (43,940 ) The sensitivity analysis does not consider dispersion of all cash flows that are expected from the plan and provides approximate values of sensitivity for the assumptions used. A weighted average duration of defined benefit obligations as of December 31, 2021 and 2020 are 9.19 years and 9.43 years, respectively.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2021
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Derivative Instruments	22. Derivative Instruments (1) Currency and interest rate swap contracts under cash flow hedge accounting as of December 31, 2021 are as follows: (In millions of won and thousands of U.S. dollars) Borrowing Hedging Instrument (Hedged item) Hedged risk Financial Duration of Jul. 20, 2007 Fixed-to-fixed face value of USD 400,000) Foreign currency risk Morgan Stanley and four other banks Jul. 20, 2007 ~ Dec. 16, 2013 Fixed-to-fixed (U.S. dollar borrowing amounting to USD 5,690) Foreign currency risk Deutsche bank Dec.16, 2013 ~ Apr. 29, 2022 Apr. 16, 2018 Fixed-to-fixed (U.S. dollar denominated bonds face value of USD 500,000) Foreign currency risk The Export-Import Bank of Korea and three other banks Apr. 16, 2018 ~ Apr. 16, 2023 Mar. 4, 2020 Floating-to-fixed (U.S. dollar-denominated bonds face value of USD 300,000) Foreign currency risk and Interest rate risk Citibank Mar. 4, 2020 ~ Jun. 4, 2025 Aug. 13, 2018 Fixed-to-fixed (U.S. dollar denominated bonds face value of USD 300,000) Foreign currency risk Citibank Aug. 13, 2018 ~ Aug. 13, 2023 Dec. 21, 2017 Floating-to-fixed (Korean won borrowing amounting to KRW 12,500) Interest rate risk Korea Development Bank Dec. 21, 2017 ~ Dec. 21, 2022 Dec. 19, 2018 Floating-to-fixed (Korean won borrowing amounting to KRW 25,000) Interest rate risk Credit Agricole CIB Mar.19, 2019 ~ Dec.14, 2023 (2) SK Broadband Co., Ltd., a subsidiary of the Parent Company, entered into Total Return Swap(TRS) contract amounting to ￦ ￦ s ￦ ￦ (3) In relation to the business acquisition by SK Broadband Co., Ltd. for the year ended December 31, 2020 the Parent Company has entered into a shareholders’ agreement with the shareholders of the acquirees. Pursuant to the agreement, when certain conditions are met within a period of time subsequent to the merger, the shareholders of the acquirees can exercise their drag-along rights and require the Parent Company to sell its shares in SK Broadband Co., Ltd. Should the shareholders exercise their drag-along rights, the Parent Company also can exercise its call options over the shares held by those shareholders. The Group recognized a derivative financial liability of ￦ million ( ￦ The fair value of SK Broadband Co., Ltd.’s common stock was estimated using 5-year Significant unobservable inputs Correlations between inputs and fair value measurements Fair value of SK Broadband Co., Ltd.’s common stock The estimated fair value of derivative liabilities would decrease (increase) if the fair value of common stock would increase (decrease) Volatility of stock price The estimated fair value of derivative liabilities would decrease (increase) if the volatility of stock price increase (decrease) (4) The Group has entered into the agreement with Newberry Global Limited, whereby the Group has been granted subscription right and contingent subscription right to acquire Newberry series-C redeemable convertible preferred stock for the year ended December 31, 2020. The Group recognized derivative financial assets of ￦ ￦ The fair value of Newberry series-C redeemable convertible preferred stock (“RCPS”) was estimated using the fair value of Newberry Global Limited’s common stock which was estimated by using market approach and its price fluctuations. The fair value of derivative financial asset was determined by using the Binomial Model based on various assumptions including the price of RCPS and its price fluctuations. Meanwhile, if the fair value of RCPS, significant unobservable input used in the fair value measurement, increases (decreases), the estimated fair value of derivative asset would increases (decreases). If the volatility of stock price, significant unobservable input used in the fair value measurement, increases (decrease), the estimated fair value of derivative asset would increases (decreases). (5) The fair value of derivative financial instruments to which the Group applies cash flow hedge is recorded in the financial statements as derivative financial assets, long-term derivative financial assets, derivative financial liabilities and long-term derivative financial liabilities. As of December 31, 2021, details of fair values of the derivatives assets and liabilities are as follows: (In millions of won and thousands of U.S. dollars) Hedging instrument (Hedged item) Cash flow hedge Fair value Current assets: Fixed-to-fixed ￦ 427 427 Non-current Fixed-to-fixed ￦ 74,555 74,555 Fixed-to-fixed 75,069 75,069 Fixed-to-fixed 30,150 30,150 Floating-to-fixed cross currency interest rate swap (U.S dollar denominated bonds face value of USD 300,000) 2,460 2,460 ￦ 182,661 182,661 Current liabilities: Floating-to-fixed ￦ (52) (52) Non-current Floating-to-fixed ￦ (59) (59) ￦ (111 ) (111 ) (6) The fair value of derivatives held for trading is recorded in the financial statements as derivative financial assets, long-term derivative financial assets and long-term derivative financial liabilities. As of December 31, 2021, details of fair values of the derivative assets and liabilities are as follows: (In millions of won) Held for trading Fair value Current assets: Contingent subscription right ￦ 9,524 9,524 Subscription right 15,477 15,477 Total return swap 4,682 4,682 Non-current Total return swap ￦ 5,250 5,250 ￦ 34,933 34,933 Non-current Share option ￦ (321,025) (321,025 )

Share Capital and Capital Surpl

Share Capital and Capital Surplus and Others	12 Months Ended
	Dec. 31, 2021
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Share Capital and Capital Surplus and Others	23. Share Capital and Capital Surplus and Others (1) Details of share capital as of December 31, 2021 and 2020 are as follows: (In millions of won, except for share data) December 31, 2021 December 31, 2020 Number of authorized shares(*1) 670,000,000 220,000,000 Par value (in won)(*1) 100 500 Number of issued shares 218,833,144 80,745,711 Share capital: Common share(*2) ￦ 30,493 44,639 (*1) As a result of stock split and spin-off, ￦ ￦ (*2) The Parent Company’s share capital decreased by ￦ spin-off (2) Changes in issued shares for the years ended December 31, 2021 and 2020 are as follows: (In shares) 2021 2020 Issued shares at January 1 80,745,711 80,745,711 Retirement of treasury shares(*1) (8,685,568 ) — Stock split(*2) 288,240,572 — Spin-off(*3) (141,467,571 ) — Issued shares at December 31 218,833,144 80,745,711 (*1) The Parent Company retired 8,685,568 treasury shares with reduction of its retained earnings before appropriation. (*2) The stock split of the Parent Company’s common share was approved at the shareholders’ meeting held on October 12, 2021. The stock split was effective from October 28, 2021. The par value of issued shares has changed from ￦ ￦ (*3) The allocation of new shares to shareholders of the spin-off ￦ Surviving Company Spin-off Company Company name SK Telecom Co SK Square Co Common shares (in shares) 0.6073625 0.3926375 (3) Details of shares outstanding as of December 31, 2021 and 2020 are as follows: (In shares) 2021 2020 Issued shares Treasury Outstanding Issued Treasury Outstanding Shares outstanding 218,833,144 1,250,992 217,582,152 80,745,711 9,418,558 71,327,153 (4) Details of capital surplus and others as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Paid-in ￦ 1,771,000 2,915,887 Treasury shares(Note 24) (57,314 ) (2,123,661 ) Hybrid bonds(Note 25) 398,759 398,759 Share option(Note 26) 47,166 1,481 Others(*) (13,783,337 ) (515,263 ) ￦ (11,623,726 ) 677,203 (*) The amount for 2021 primarily consists of a change in equity amounting to ￦

Treasury Shares

Treasury Shares	12 Months Ended
	Dec. 31, 2021
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Treasury Shares	24. Treasury Shares (1) Treasury shares as of December 31, 2021 and 2020 are as follows: (In millions of won, except for share data) December 31, December 31, Number of shares 1,250,992 9,418,558 Acquisition cost ￦ 57,314 2,123,661 (2) Changes in treasury shares for the years ended December 31, 2021 and 2020 are as follows: (In shares) 2021 2020 Treasury shares at January 1 9,418,558 7,609,263 Acquisition(*1) 288,000 1,809,295 Disposal(*2) (626,740 ) — Retirement of treasury shares(*3) (8,685,568 ) — Stock split(*4) 1,577,000 — Spin-off(*5) (719,955 ) — Disposal(*6) (303 ) — Treasury shares at December 31 1,250,992 9,418,558 (*1) The Parent Company acquired 288,000 of its treasury shares for ￦ ￦ (*2) The Parent Company distributed 626,240 treasury shares (acquisition cost: ￦ spin-off, ￦ ￦ ￦ non-executive ￦ (*3) The Parent Company retired 8,685,568 treasury shares with reduction of its retained earnings before appropriation, as a result, the P a (*4) The stock split of the Parent Company’s common stock was approved at the shareholders’ meeting held on October 12, 2021, to increase the number of its outstanding shares, effective from October 28, 2021. (*5) 773,987 spin-off spin-off. ￦ spin-off. (*6) The Parent Company distributed 303 treasury shares (acquisition cost: ￦ spin-off ￦

Hybrid Bonds

Hybrid Bonds	12 Months Ended
	Dec. 31, 2021
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Hybrid Bonds	25. Hybrid Bonds Hybrid bonds classified as equity as of December 31, 2021 and 2020 are as follows: (In millions of won) Type Issuance date Maturity(*1) Annual December 31, December 31, Series 2-1 Unsecured subordinated bearer bond June 7, 2018 June 7, 2078 3.70 ￦ 300,000 300,000 Series 2-2 Unsecured subordinated bearer bond June 7, 2018 June 7, 2078 3.65 100,000 100,000 Issuance costs (1,241 ) (1,241 ) ￦ 398,759 398,759 As there is no contractual obligation to deliver financial assets to the holders of hybrid bonds, the Group classified the hybrid bonds as equity. These are subordinated bonds which rank before common shares in the event of a liquidation or reorganization of the Parent Company. (*1) The Parent Company has a right to extend the maturity without any notice or announcement. (*2) Annual interest rate is determined as yield rate of 5-year step-up

Share based payment arrangement

Share based payment arrangement	12 Months Ended
	Dec. 31, 2021
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Share based payment arrangement	26. Share based payment arrangement (1) The terms and conditions related to the grants of the share based payment arrangement are as follows: 1) Equity-settled share-based payment arrangement Parent Company 1-1 1-2 1-3 2 3 4 5(*2) 6(*2) Grant date March 24, 2017 February 20, February 22, March 26, 2019 March 26, 2020 March 25, 2021 Types of shares to be issued Registered common shares Grant method Reissue of treasury shares, cash settlement Number of shares (in shares)(*1) 67,320 67,320 67,320 4,124 12,685 5,266 381,937 94,657 Exercise price (in won)(*1) 49,350 53,298 57,562 50,824 53,052 50,862 38,452 50,276 Exercise period Mar. 25, 2019 ~ Mar. 24, 2022 Mar. 25, 2020 ~ Mar. 24, 2023 Mar. 25, 2021 ~ Mar. 24, 2024 Feb. 21, 2020 ~ Feb. 20, 2023 Feb. 23, 2021 ~ Feb. 22, 2024 Mar. 27, 2021 ~ Mar. 26, 2024 Mar. 27, 2023 ~ Mar. 26, 2027 Mar. 26, 2023 ~ Mar. 25, 2026 Vesting conditions 2 years’ service from the grant date 3 years’ service from the 4 years’ service 2 years’ service from 2 years’ service from 2 years’ service from the grant date 3 years’ service from the grant date 2 years’ service from the grant date 2) Cash-settled share-based payment arrangement Share appreciation rights of SK Telecom Co., Ltd.(*3) Share appreciation rights of SK Square Co., Ltd.(*3) Grant date January 1, 2021 Grant method Cash settlement Number of shares (in shares)(*1) 224,692 145,247 Exercise price (in won)(*1) 50,276 Exercise period Jan. 1, 2023 ~ Mar. 28, 2024 Vesting conditions 2 years’ service from the grant date (*1) Number of shares granted and exercise price are adjusted as a result of stock split and spin-off (*2) Parts of the grant that have not met the vesting conditions have been forfeited for the year ended December 31, 2021. (*3) The Parent Company newly established the long-term incentive policy as part of the compensation related to the growth of corporate value on the beginning of the year, and granted cash settled share appreciation rights to executives. As a result of spin-off (2) Share compensation expense recognized for the year ended December 31, 2021 and the remaining share compensation expense to be recognized in subsequent periods are as follows: (In millions of won) Share As of December 31, 2020 ￦ 7,589 For the year ended December 31, 2021(*) 87,622 In subsequent periods 75,318 ￦ 170,529 A ￦ (*) Includes amounts related to discontinued operations. (3) The Parent Company used binomial option pricing model in the measurement of the fair value of the share options at grant date and the inputs used in the model are as follows: 1) Equity-settled share-based payment arrangement (In won) Parent Company 1-1 1-2 1-3 2 3 4 5 6 Risk-free interest rate 1.86 % 1.95 % 2.07 % 2.63 % 1.91 % 1.78 % 1.52 % 1.55 % Estimated option’s life 5 years 6 years 7 years 5 years 5 years 5 years 7 years 5 years Share price (Closing price on the preceding day)(*) 52,500 52,500 52,500 48,700 51,800 50,600 34,900 49,800 Expected volatility 13.38 % 13.38 % 13.38 % 16.45 % 8.30 % 7.70 % 8.10 % 25.70 % Expected dividends 3.80 % 3.80 % 3.80 % 3.70 % 3.80 % 3.90 % 5.70 % 4.00 % Exercise price(*) 49,350 53,298 57,562 50,824 53,052 50,862 38,452 50,276 Per-share 5,403 4,048 3,096 4,798 1,720 1,622 192 8,142 2) Cash-settled share-based payment arrangement (In won) Share appreciation rights of SK Telecom Co., Ltd. Share appreciation rights of SK Square Co., Ltd. Risk-free interest rate 1.71 % 1.71 % Estimated option’s life 3.25 years 3.25 years Share price on the remeasurement date 57,900 66,400 Expected volatility 26.00 % 26.00 % Expected dividends 3.40 % 0.00 % Exercise price(*) 50,276 50,276 Per-share 10,646 20,321 (*) Share price (closing price on the preceding day), exercise price and per-share spin-off Meanwhile, the Board of Directors of the Parent Company resolved to dispose its treasury shares for the purpose of allotment of shares as bonus payment on October 12, 2021. The transaction is equity-settled share-based payment transactions in accordance with IFRS 2 and 505,350 shares (before stock split) were granted on October 12, 2021(grant date). 7,700 shares (before stock split) out of 505,350 shares (before stock split) were transferred to spin-off per-share ￦ spin-off. ￦ ￦ spin-off

Retained Earnings

Retained Earnings	12 Months Ended
	Dec. 31, 2021
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Retained Earnings	27. Retained Earnings (1) Retained earnings as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Appropriated: Legal reserve ￦ 22,320 22,320 Reserve for business expansion 11,631,138 11,631,138 Reserve for technology development 4,365,300 4,365,300 15,996,438 15,996,438 Unappropriated 6,418,583 6,963,155 ￦ 22,437,341 22,981,913 (2) Legal reserve The Korean Commercial Act requires the Parent Company to appropriate as a legal reserve at least 10% of cash dividends paid for each accounting period until the reserve equals 50% of outstanding share capital. The legal reserve may not be utilized for cash dividends, but may only be used to offset a future deficit, if any, or may be transferred to share capital.

Reserves

Reserves	12 Months Ended
	Dec. 31, 2021
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Reserves	28. Reserves (1) Details of reserves, net of taxes, as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Valuation gain on FVOCI ￦ 633,240 438,979 Other comprehensive gain (loss) of investments in associates and joint ventures 53,770 (392,333 ) Valuation gain on derivatives 33,918 17,615 Foreign currency translation differences for foreign operations 14,310 (24,122 ) ￦ 735,238 40,139 (2) Changes in reserves for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) Valuation gain Other Valuation gain Foreign currency Total Balance at January 1, 2020 ￦ (47,086 ) (278,142 ) (920 ) (3,428 ) (329,576 ) Changes, net of taxes 486,065 (114,191 ) 18,535 (20,694 ) 369,715 Balance at December 31, 2020 ￦ 438,979 (392,333 ) 17,615 (24,122 ) 40,139 Changes, net of taxes 194,261 446,103 16,303 38,432 695,099 Balance at December 31, 2021 ￦ 633,240 53,770 33,918 14,310 735,238 (3) Changes in valuation gain (loss) on financial assets at FVOCI for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 2020 Balance at January 1 ￦ 438,979 (47,086 ) Amount recognized as other comprehensive income for the year, net of taxes 627,833 486,440 Amount reclassified to retained earnings, net of taxes (12,429 ) (375 ) Changes from spin-off, (421,143 ) — Balance at December 31 ￦ 633,240 438,979 (4) Changes in valuation gain (loss) on derivatives for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 2020 Balance at January 1 ￦ 17,615 (920 ) Amount recognized as other comprehensive income for the year, net of taxes 9,731 15,414 Amount reclassified to profit, net of taxes 6,572 3,121 Balance at December 31 ￦ 33,918 17,615

Other Operating Income and Expe

Other Operating Income and Expenses	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Other Operating Income and Expenses	29. Other Operating Income and Expenses Details of other operating income and (In millions of won) 2021 2020 2019 Other Operating Income: Gain on disposal of property and equipment and intangible assets ￦ 39,136 34,625 7,755 Others(*) 76,627 61,126 87,828 ￦ 115,763 95,751 95,583 Other Operating Expenses: Communication ￦ 32,462 34,462 32,986 Utilities 350,678 336,187 315,129 Taxes and dues 33,935 34,577 38,688 Repair 425,606 399,376 368,620 Research and development 347,711 353,198 324,052 Training 31,761 33,384 32,581 Bad debt for accounts receivable — trade 29,402 45,002 25,376 Travel 7,813 7,534 20,717 Supplies and other 101,656 105,333 104,943 Loss on disposal of property and equipment and intangible assets 28,158 25,633 23,821 Impairment loss on property and equipment and intangible assets 3,135 200,705 42,823 Donations 12,800 16,051 16,782 Bad debt for accounts receivable — other 3,995 6,640 3,594 Others(*) 22,475 60,280 60,176 ￦ 1,431,587 1,658,362 1,410,288 (*) See note 4 (2).

Finance Income and Costs

Finance Income and Costs	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Finance Income and Costs	30. Finance Income and Costs (1) Details of finance income and costs for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Finance Income: Interest income ￦ 36,708 37,030 48,605 Gain on sale of accounts receivable — other 27,725 22,605 15,855 Dividends 12,039 1,170 10,011 Gain on foreign currency transactions 10,987 9,029 8,836 Gain on foreign currency translations 7,505 7,888 4,064 Gain relating to financial instruments at FVTPL 60,169 62,963 34,321 ￦ 155,133 140,685 121,692 Finance Costs: Interest expense ￦ 279,737 288,972 306,665 Loss on sale of accounts receivable — other — — 5,823 Loss on foreign currency transactions 12,270 11,053 10,038 Loss on foreign currency translations 6,764 8,973 4,242 Loss on disposal of long-term investment securities — 98 — Loss relating to financial instruments at FVTPL 16,833 13,847 8,144 ￦ 315,604 322,943 334,912 (2) Details of interest income included in finance income for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Interest income on cash equivalents and financial instruments(*) ￦ 16,141 24,378 29,854 Interest income on loans and others(*) 27,709 25,979 33,725 ￦ 43,850 50,357 63,579 (*) Includes amounts related to discontinued operations. (3) Details of interest expenses included in finance costs for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Interest expense on borrowings(*) ￦ 66,188 116,397 104,991 Interest expense on debentures(*) 224,144 225,309 224,765 Others(*) 52,010 57,470 76,331 ￦ 342,342 399,176 406,087 (*) Includes amounts related to discontinued operations. (4) Finance income and costs by category of financial instruments for the years ended December 31, 2021, 2020 and 2019 are as follows. Bad debt expense (reversal of loss allowance) for accounts receivable — trade, loans and receivables are presented and explained separately in notes 6 and 3 5 1) Finance income and costs (In millions of won) 2021 Finance income(*) Finance costs(*) Financial Assets: Financial assets at FVTPL ￦ 149,590 67,503 Financial assets at FVOCI 3,413 142,015 Financial assets at amortized cost 48,940 12,262 Derivatives designated as hedging instrument — 600 201,943 222,380 Financial Liabilities: Financial liabilities at FVTPL — 8,036 Financial liabilities at amortized cost 607 355,011 607 363,047 ￦ 202,550 585,427 (*) Includes amounts related to discontinued operations. (In millions of won) 2020 Finance income(*1) Finance costs(*1) Financial Assets: Financial assets at FVTPL(*2) ￦ 180,254 10,894 Financial assets at FVOCI 993 44,832 Financial assets at amortized cost(*2) 46,135 24,601 Derivatives designated as hedging instrument — 1,867 227,382 82,194 Financial Liabilities: Financial liabilities at FVTPL — 12,115 Financial liabilities at amortized cost 6,434 400,678 Derivatives designated as hedging instrument 7,380 2,206 13,814 414,999 ￦ 241,196 497,193 (*1) Includes amounts related to discontinued operations. (*2) The Group reclassified the category of financial assets measured at amortized cost. Accordingly, the category of financial income arising on reclassification of a financial asset is reclassified. (In millions of won) 2019 Finance income(*1) Finance costs(*1) Financial Assets: Financial assets at FVTPL(*2) ￦ 79,529 13,577 Financial assets at FVOCI 9,924 — Financial assets at amortized cost(*2) 52,543 17,488 141,996 31,065 Financial Liabilities: Financial liabilities at FVTPL 56 43 Financial liabilities at amortized cost 103 406,206 Derivatives designated as hedging instrument — 641 159 406,890 ￦ 142,155 437,955 (*1) Includes amounts related to discontinued operations. (*2) The Group reclassified the category of financial assets measured at amortized cost. Accordingly, the category of financial income arising on reclassification of a financial asset is reclassified. 2) Other comprehensive income (loss) (In millions of won) 2021 2020 2019 Financial Assets: Financial assets at FVOCI ￦ 920,871 579,678 (17,943 ) Derivatives designated as hedging instrument 15,427 24,320 41,305 936,298 603,998 23,362 Financial Liabilities: Derivatives designated as hedging instrument 706 (5,182 ) (624 ) ￦ 937,004 598,816 22,738 (5) Details of impairment losses for financial assets for th e (In millions of won) 2021 2020 2019 Accounts receivable — trade(*) ￦ 31,546 48,625 28,841 Other receivables(*) 6,001 10,559 5,802 ￦ 37,547 59,184 34,643 (*) Includes amounts related to discontinued operations.

Income Tax Expense

Income Tax Expense	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Income Tax Expense	31. Income Tax Expense (1) Income tax expenses for the years ended December 31, 2021, 2020 and 2019 consist of the following: (In millions of won) 2021 2020 2019 Current tax expense: Current year ￦ 319,539 286,717 105,859 Current tax of prior years(*) 705 14,536 (6,855 ) 320,244 301,253 99,004 Deferred tax expense: Changes in net deferred tax assets 331,704 75,249 201,264 Income tax expense Tax expense of continuing operation 446,796 221,262 262,940 Tax expense of discontinued operation 205,152 155,240 37,328 ￦ 651,948 376,502 300,268 (*) Current tax of prior years are mainly composed of the income tax refund due to a change in the interpretation of the tax authority in relation to the income tax previously recognized by the Group. (2) The difference between income taxes computed using the statutory corporate income tax rates and the recorded income taxes for the years ended December 31, 2021, 2020 and 2019 is attributable to the following: (In millions of won) 2021 2020 2019 Income taxes at statutory income tax rate ￦ 834,146 505,824 308,913 Non-taxable (13,924 ) (41,084 ) (92,666 ) Non-deductible 15,329 31,882 14,630 Tax credit and tax reduction (62,075 ) (48,774 ) (32,877 ) Changes in unrecognized deferred taxes (68,589 ) (69,776 ) 83,940 Changes in tax rate (36,193 ) 24,537 4,050 Income tax refund and others (16,746 ) (26,107 ) 14,278 Income tax expense ￦ 651,948 376,502 300,268 (3) Deferred taxes directly charged to (credited from) equity for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Valuation gain (loss) on financial assets measured at fair value ￦ (208,490 ) (166,612 ) 2,983 Share of other comprehensive income (loss) of associates and joint ventures (34 ) (14 ) 2,279 Valuation loss on derivatives (5,709 ) (6,886 ) (16,083 ) Remeasurement of defined benefit liabilities (3,780 ) (164 ) 22,733 Gain on disposal of treasury shares and others 26,970 — — ￦ (191,043 ) (173,676 ) 11,912 (4) Details of the changes in deferred tax assets (liabilities) for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 Beginning Deferred tax Directly charged to (credited from) equity Business combinations Spin-off Ending Deferred tax assets (liabilities) related to temporary differences: Loss allowance ￦ 91,285 (8,397 ) — — (5,531 ) 77,357 Accrued interest income (1,631 ) (2,022 ) — — 3,487 (166 ) Financial assets measured at fair value (81,055 ) (6,765 ) (208,490 ) — 138,482 (157,828 ) Investments in subsidiaries, associates and joint ventures (1,673,906 ) (281,035 ) (34 ) — 1,923,158 (31,817 ) Property and equipment and intangible assets (511,862 ) (42,456 ) — (1,023 ) 249,374 (305,967 ) Provisions 6,294 (1,436 ) — — (660 ) 4,198 Retirement benefit obligation 102,285 (3,563 ) (3,780 ) — (42,610 ) 52,332 Valuation gain on derivatives 14,767 210 (5,709 ) — (2,932 ) 6,336 Gain or loss on foreign currency translation 21,774 (396 ) — — — 21,378 Incremental costs to acquire a contract (807,831 ) 53,492 — — 4,468 (749,871 ) Contract assets and liabilities (2,606 ) 405 — — — (2,201 ) Right-of-use (372,297 ) (35,851 ) — — 18,646 (389,502 ) Lease liabilities 362,476 38,600 — — (19,539 ) 381,537 Others 120,514 (95,537 ) 26,970 (135 ) 16,669 68,481 (2,731,793 ) (384,751 ) (191,043 ) (1,158 ) 2,283,012 (1,025,733 ) Deferred tax assets related to unused tax loss carryforwards and tax credit carryforwards: Tax loss carryforwards 88,223 7,915 — — (96,138 ) — Tax credit 39,583 45,132 — — (155 ) 84,560 127,806 53,047 — — (96,293 ) 84,560 ￦ (2,603,987 ) (331,704 ) (191,043 ) (1,158 ) 2,186,719 (941,173 ) (In millions of won) 2020 Beginning Deferred tax Directly charged to (credited from) equity Business combinations Ending Deferred tax assets (liabilities) related to temporary differences: Loss allowance ￦ 88,913 1,326 — 1,046 91,285 Accrued interest income (2,039 ) 435 — (27 ) (1,631 ) Financial assets measured at fair value 98,101 (17,586 ) (166,612 ) 5,042 (81,055 ) Investments in subsidiaries, associates and joint ventures (1,613,048 ) (60,844 ) (14 ) — (1,673,906 ) Property and equipment and intangible assets (371,489 ) (47,468 ) — (92,905 ) (511,862 ) Provisions 2,543 3,751 — — 6,294 Retirement benefit obligation 100,194 1,873 (164 ) 382 102,285 Valuation gain on derivatives 17,507 4,146 (6,886 ) — 14,767 Gain or loss on foreign currency translation 22,005 (231 ) — — 21,774 Incremental costs to acquire a contract (829,055 ) 21,224 — — (807,831 ) Contract assets and liabilities (28,030 ) 25,424 — — (2,606 ) Right-of-use (390,936 ) 18,639 — — (372,297 ) Lease liabilities 385,394 (22,918 ) — — 362,476 Others 64,620 (30,310 ) — 86,204 120,514 (2,455,320 ) (102,539 ) (173,676 ) (258 ) (2,731,793 ) Deferred tax assets related to unused tax loss carryforwards and tax credit carryforwards: Tax loss carryforwards 91,136 (2,913 ) — — 88,223 Tax credit 9,380 30,203 — — 39,583 100,516 27,290 — — 127,806 ￦ (2,354,804 ) (75,249 ) (173,676 ) (258 ) (2,603,987 ) (5) Details of temporary differences, unused tax loss carryforwards and unused tax credits carryforwards which are not recognized as deferred tax assets (liabilities), in the consolidated statements of financial position as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Loss allowance ￦ 85,998 102,085 Investments in subsidiaries, associates and joint ventures (176,520 ) 8,365 Other temporary differences 61,368 68,415 Unused tax loss carryforwards 347,889 1,042,063 Unused tax credit carryforwards 34 1,037 (6) The amount of unused tax loss carryforwards and unused tax credit carryforwards which are not recognized as deferred tax assets as of December 31, 2021 are expiring within the following periods: (In millions of won) Unused tax loss carryforwards Unused tax credit carryforwards Less than 1 year ￦ 57,346 — 1 ~ 2 years 39,974 — 2 ~ 3 years 19,087 — More than 3 years 231,482 34 ￦ 347,889 34

Earnings per Share

Earnings per Share	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Earnings per Share	32. Earnings per Share (1) Basic earnings per share 1) Basic earnings per share for the years ended December 31, 2021, 2020 and 2019 are calculated as follows: (In millions of won, except for share data) 2021 2020 2019 Basic earnings per share attributable to owners of the Parent Profit from continuing operation attributable to owners of the Parent Company ￦ 1,217,520 648,579 544,099 Interest on hybrid bonds (14,766 ) (14,766 ) (14,766 ) Profit from continuing operation attributable to owners of the Parent Company on common shares 1,202,754 633,813 529,333 Profit from discontinued operation attributable to owners of the Parent Company on common shares 1,190,003 855,773 344,598 Weighted average number of common shares outstanding 332,761,592 363,977,155 360,320,795 Basic earnings per share (in won) Continuing operation ￦3,614 1,741 1,469 Discontinued operation 3,576 2,352 956 2) The weighted average number of common shares outstanding for the years ended December 31, 2021, 2020 and 2019 are calculated as follows: (In shares) 2021 Number of common shares Weighted average number of common shares Issued shares at January 1, 2021 403,728,555 403,728,555 Treasury shares at January 1, 2021 (47,092,790 ) (47,092,790 ) Acquisition of treasury shares (1,494,032 ) (1,383,241 ) Disposal of treasury shares 3,134,003 1,022,242 Spin-off (140,693,584 ) (23,513,174 ) 217,582,152 332,761,592 (In shares) 2020 Number of common shares Weighted average number of common shares Issued shares at January 1, 2020 403,728,555 403,728,555 Treasury shares at January 1, 2020 (38,046,315 ) (38,046,315 ) Acquisition of treasury shares (9,046,475 ) (1,705,085 ) 356,635,765 363,977,155 (In shares) 2019 Number of common shares Weighted average number of common shares Issued shares at January 1, 2019 403,728,555 403,728,555 Treasury shares at January 1, 2019 (44,379,415 ) (44,379,415 ) Disposal of treasury shares 6,333,100 971,655 365,682,240 360,320,795 Weighted average number of common shares for comparative period has been retrospectively adjusted to reflect the effect of the stock split (see note 23 (2)). (2) Diluted earnings per share 1) Diluted earnings per share for the years ended December 31, 2021 and 2020 are calculated as follows: (In millions of won, except for share data) 2021 2020 Profit from continuing operation attributable to owners of the Parent Company on common shares ￦ 1,202,754 633,813 Profit from discontinued operation attributable to owners of the Parent Company on common shares 1,190,003 855,773 Adjusted weighted average number of common shares outstanding 332,917,848 364,041,895 Diluted earnings per share (in won) Continuing operation ￦ 3,613 1,741 Discontinued operation 3,574 2,351 2) The adjusted weighted average number of common shares outstanding for the years ended December 31, 2021 and 2020 are calculated as follows: (In shares) 2021 2020 Outstanding shares at January 1 356,635,765 365,682,240 Effect of treasury shares (360,999 ) (1,705,085 ) Effect of Spin-off (23,513,174 ) — Effect of share option 156,256 64,740 Adjusted weighted average number of common shares outstanding 332,917,848 364,041,895 For the year ended December 31, 2019, diluted earnings per share are the same as basic earnings per share as there are no dilutive potential common shares.

Dividends

Dividends	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Dividends	33. Dividends (1) Details of dividends declared Details of dividend declared for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won, except for face value and share data) Year Dividend type Number of Face value Dividend Dividends 2021 Cash dividends (Interim) 217,616,645 100 1,635 % ￦ 355,804 Cash dividends (Year-end) 217,582,152 100 1,660 % 361,186 ￦ 716,990 2020 Cash dividends (Interim) 73,136,448 500 200 % ￦ 73,136 Cash dividends (Year-end) 71,327,153 500 1,800 % 641,944 ￦ 715,080 2019 Cash dividends (Interim) 71,869,828 500 200 % ￦ 71,870 Cash dividends (Year-end) 73,136,448 500 1,800 % 658,228 ￦ 730,098 (2) Dividends yield ratio Dividends yield ratios for the years ended December 31, 2021, 2020 and 2019 are as follows: (In won) Year Dividend type Dividend per share Closing price at year-end Dividend yield ratio 2021 Cash dividends 3,295 57,900 5.69% 2020 Cash dividends 10,000 238,000 4.20% 2019 Cash dividends 10,000 238,000 4.20%

Categories of Financial Instrum

Categories of Financial Instruments	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Categories of Financial Instruments	34. Categories of Financial Instruments (1) Financial assets by category as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Financial Equity Debt Financial Derivatives Total Cash and cash equivalents ￦ 505,578 — — 367,153 — 872,731 Financial instruments 389,368 — — 119,684 — 509,052 Short-term investment securities 5,010 — — — — 5,010 Long-term investment securities(*) 203,473 1,510,428 1,177 — — 1,715,078 Accounts receivable — trade — — — 1,921,617 — 1,921,617 Loans and other receivables 459,959 — — 735,958 — 1,195,917 Derivative financial assets 34,933 — — — 182,661 217,594 ￦ 1,598,321 1,510,428 1,177 3,144,412 182,661 6,436,999 (*) The Group designated ￦ (In millions of won) December 31, 2020 Financial Equity Debt Financial Derivatives Total Cash and cash equivalents(*1) ￦ 539,372 — — 830,281 — 1,369,653 Financial instruments(*1) 1,122,251 — — 305,594 — 1,427,845 Short-term investment securities 150,392 — — — — 150,392 Long-term investment securities(*2) 193,396 1,454,361 1,080 — — 1,648,837 Accounts receivable — trade — — — 2,214,353 — 2,214,353 Loans and other receivables 517,175 — — 1,220,828 — 1,738,003 Derivative financial assets 99,559 — — — 65,136 164,695 ￦ 2,622,145 1,454,361 1,080 4,571,056 65,136 8,713,778 (*1) Some of the financial assets measured at amortized cost were reclassified to financial assets measured at FVTPL. (*2) The Group designated ￦ (2) Financial liabilities by category as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Financial Financial Derivatives Total Accounts payable — trade ￦ — 190,559 — 190,559 Derivative financial liabilities 321,025 — 111 321,136 Borrowings — 407,185 — 407,185 Debentures — 8,426,683 — 8,426,683 Lease liabilities(*) — 1,534,282 — 1,534,282 Accounts payable — other and others — 5,524,692 — 5,524,692 ￦ 321,025 16,083,401 111 16,404,537 (In millions of won) December 31, 2020 Financial Financial Derivatives Total Accounts payable — trade ￦ — 372,909 — 372,909 Derivative financial liabilities 333,099 — 42,061 375,160 Borrowings — 2,138,922 — 2,138,922 Debentures — 8,579,743 — 8,579,743 Lease liabilities(*) — 1,436,777 — 1,436,777 Accounts payable — other and others — 6,051,550 — 6,051,550 ￦ 333,099 18,579,901 42,061 18,955,061 (*) Lease liabilities are not applicable on category of financial liabilities, but are classified as financial liabilities measured at amortized cost on consideration of nature for measurement of liabilities.

Financial Risk Management

Financial Risk Management	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Financial Risk Management	35. Financial Risk Management (1) Financial risk management The Group is exposed to market risk, credit risk and liquidity risk. Market risk is the risk related to the changes in market prices, such as foreign exchange rates and interest rates. The Group implements a risk management system to monitor and manage these specific risks. The Group’s financial assets consist of cash and cash equivalents, financial instruments, investment securities, accounts receivable — trade and other, etc. Financial liabilities consist of accounts payable — trade and other, borrowings, debentures, lease liabilities and others. 1) Market risk (i) Currency risk The Group incurs exchange position due to revenue and expenses from its global operations. Major foreign currencies where the currency risk occur are USD, EUR and JPY. The Group determines the currency risk management policy after considering the nature of business and the presence of methods that mitigate the currency risk for each Group entities. Currency risk occurs on forecasted transactions and recognized assets and liabilities which are denominated in a currency other than the functional currency of each Group entity. The Group manages currency risk arising from business transactions by using currency forwards, etc. Monetary assets and liabilities denominated in foreign currencies as of December 31, 2021 are as follows: (In millions of won, thousands of foreign currencies) Assets Liabilities Foreign currencies Won Foreign currencies Won USD 52,331 ￦ 62,038 1,527,169 ￦ 1,810,459 EUR 59 80 — — JPY — — 87,837 905 Others — 172 — 145 ￦ 62,290 ￦ 1,811,509 In addition, the Group has entered into cross currency swaps to hedge against currency risk related to foreign currency borrowings and debentures. (See note 22) As of December 31, 2021, a hypothetical change in exchange rates by 10% would have increased (decreased) the Group’s income before income tax as follows: (In millions of won) If increased by 10% If decreased by 10% USD ￦ 2,830 (2,830 ) EUR 8 (8 ) JPY (90 ) 90 Others 2 (2 ) ￦ 2,750 (2,750 ) (ii) Interest rate risk The interest rate risk of the Group arises from borrowings, debentures and long-term payables — other. Since the Group’s interest bearing assets are mostly fixed-interest bearing assets, the Group’s revenue and operating cash flows from the interest-bearing assets are not influenced by the changes in market interest rates. The Group performs various analysis to reduce interest rate risk and to optimize its financing. To minimize risks arising from changes in interest rates, the Group takes various measures such as refinancing, renewal, alternative financing and hedging. As of December 31, 2021, floating-rate borrowings and debentures amount to ￦ ￦ As of December 31, 2021, the floating-rate long-term payables — other are ￦ ￦ Interest rate benchmark reform and associated risks A fundamental reform of major interest rate benchmarks is being undertaken globally, including the replacement of some interbank offered rates (IBORs) with alternative nearly risk-free rates (referred to as ‘IBOR reform’). Especially, in the case of LIBOR, all of the calculations were suspended as of December 31, 2021, except for the overnight, one month, three months, six months, and 12 months of USD LIBOR, and the aforementioned five USD LIBORs will also be suspended as of June 30, 2023. The alternative interest rate benchmark of USD LIBOR is the Secured Overnight Financing Rate(“SOFR”). Meanwhile, in case of Korean CD rate, the alternative interest rate benchmark has selected as Korea Overnight Financing Repo Rate(“KOFR”) and as part of interest rate benchmark reform, the interest rate has been disclosed through Korea Securities Depository since November 26, 2021. KOFR is calculated using the overnight RP rate as collateral for government bonds and monetary stabilization bonds. However, unlike LIBOR, calculation of CD rate will not be suspended, it is unclear when and how the transition to KOFR will take place. The Group plans to include fallback clauses into financial instruments relating to LIBOR to which calculation has not been suspended yet, or change their LIBOR directly to alternative interest rates before the calculation is suspended. Meanwhile, The Group is closely monitoring market trends for CD rate-related financial instruments. The Group’s financial instruments exposed to the risk arising from interest rate benchmark reform as of December 31, 2021 are indexed to the USD LIBOR. The Group is exposed to legal risk to amend the terms of contracts on the financial instruments subject to interest rate benchmark reform as well as process and operation risks to manage such amendments. In addition, the Group is exposed to the risk of monitoring the market trend regarding the alternative interest rate and establishing the corresponding risk management strategy. If the IBOR is designated as the hedged item, the Group is required to replace it to an alternative benchmark interest and review the effects on the hedging relationship. In addition, the Group is exposed to the risk of minimizing hedge ineffectiveness by aligning the method and timing of the transition to the alternative benchmark interest applied to the hedged item and the hedging instrument. The Group evaluates the extent to which contracts reference IBOR cash flows, whether such contracts will need to be amended as a result of IBOR reform and how to manage communication about IBOR reform with counterparties. Non-derivative The Parent Company’s non-derivative Derivatives The Group’s most derivative instruments designated as cash flow hedge are governed by contracts based on the International Swaps and Derivatives Association (ISDA)’s master agreements. As part of interest rate benchmark reform, ISDA has included a new fallback clause regarding which alterative benchmark interest rate to be applied when the calculation of major IBOR is suspended in the master agreement. The master agreement is applied to derivative contracts after January 25, 2021 and the transaction parties is required to adhere to ISDA protocol to include the same fallback clause to derivative contracts before January 25, 2021. The Group has adhered to ISDA protocol for transition to the alternative benchmark interest rate and the fallback clause will be included when counterparties adhere to the protocol to include. The Group’s counterparties have adhered to ISDA protocol and agreed to include the fallback clause. Hedge accounting The Group’s hedged items and hedging instruments as of December 31, 2021 are indexed to USD LIBOR. These benchmark rates are quoted each day and the IBOR cash flows are exchanged with counterparties as usual. 2) Credit risk The maximum credit exposure as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Cash and cash equivalents ￦ 872,550 1,369,423 Financial instruments 509,052 1,427,845 Investment securities 2,077 4,154 Accounts receivable — trade 1,921,617 2,214,353 Contract assets 118,278 148,281 Loans and other receivables 1,195,917 1,738,003 Derivative financial assets 217,594 164,695 ￦ 4,837,085 7,066,754 Credit risk is the risk of financial loss to the Group if a customer or counterparty to a financial instrument fails to meet its contractual obligations. To manage credit risk, the Group evaluates the credit worthiness of each customer or counterparty considering the party’s financial information, its own trading records and other factors. Based on such information, the Group establishes credit limits for each customer or counterparty. (i) Accounts receivable — trade and contract assets The Group establishes a loss allowance in respect of accounts receivable — trade and contract assets. The main components of this allowance are a specific loss component that relates to individually significant exposures and a collective loss component established for groups of similar assets in respect of losses that are expected to occur. The collective loss allowance is determined based on historical data of collection statistics for similar financial assets. Details of changes in loss allowance for (ii) Debt investments The credit risk arises from debt investments included in ￦ ￦ ￦ Most of the Group’s debt investments are considered to have a low risk of default and the borrower has a strong capacity to meet its contractual cash flow obligations in the near term. Thus the Group measured the loss allowance for the debt investments at an amount equal to 12-month Meanwhile, the Group monitors changes in credit risk at each reporting date. The Group recognized the loss allowance at an amount equal to lifetime expected credit losses when the credit risk on the debt investments is assumed to have increased significantly if it is more than 30 days past due. The Group’s maximum exposure to credit risk is equal to each financial asset’s carrying amount. The gross carrying amounts of each financial asset except for the accounts receivable — trade and derivative financial assets as of December 31, 2021 are as follows. (In millions of won) Financial assets at Financial At amortized cost 12-month ECL Lifetime ECL — Lifetime ECL — Gross amount ￦ 850,227 1,177 754,918 43,643 149,091 Loss allowance — — (2,787 ) (6,190 ) (83,033 ) Carrying amount ￦ 850,227 1,177 752,131 37,453 66,058 Changes in the loss allowance for the debt investments for the year ended December 31, 2021 are as follows: (In millions of won) 12-month ECL Lifetime ECL — Lifetime ECL — Total December 31, 2020 ￦ 3,751 7,995 88,819 100,565 Remeasurement of loss allowance, net(*) 316 2,885 2,800 6,001 Transfer to lifetime ECL — not credit impaired (306 ) 306 — — Transfer to lifetime ECL — credit impaired (980 ) (2,555 ) 3,535 — Amounts written off — — (16,429 ) (16,429 ) Recovery of amounts written off 6 — 10,495 10,501 Business combination — — 358 358 Spin-off — (2,441 ) (6,545 ) (8,986 ) December 31, 2021 ￦ 2,787 6,190 83,033 92,010 (*) Includes amounts related to discontinued operations. (iii) Cash and cash equivalents The Group has ￦ ￦ 12-month 3) Liquidity risk The Group’s approach to managing liquidity is to ensure that it will always maintain sufficient cash and cash equivalents balances and have enough liquidity through various committed credit lines. The Group maintains enough liquidity within credit lines through active operating activities. Contractual maturities of financial liabilities as of December 31, 2021 are as follows: (In millions of won) Carrying Contractual Less than 1 - 5 years More than Accounts payable — trade ￦ 190,559 190,559 190,559 — — Borrowings(*) 407,185 420,503 59,864 360,639 — Debentures(*) 8,426,683 9,479,976 1,603,760 4,987,959 2,888,257 Lease liabilities 1,534,282 1,653,416 359,356 989,603 304,457 Accounts payable — other and others(*) 5,524,692 5,636,104 3,917,356 1,534,636 184,112 ￦ 16,083,401 17,380,558 6,130,895 7,872,837 3,376,826 (*) Includes interest payables. The Group does not expect that the cash flows included in the maturity analysis could occur significantly earlier or at different amounts. As of December 31, 2021, periods in which cash flows from cash flow hedge derivatives are expected to occur are as follows: (In millions of won) Carrying Contractual Less than 1 1 - 5 years More than Assets ￦ 182,661 188,759 27,248 135,409 26,102 Liabilities (111 ) (111 ) (52 ) (59 ) — ￦ 182,550 188,648 27,196 135,350 26,102 (2) Capital management The Group manages its capital to ensure that it will be able to continue as a business while maximizing the return to shareholders through the optimization of its debt and equity structure. The overall strategy of the Group is the same as that of the Group as of and for the year ended December 31, 2020. The Group monitors its debt-equity ratio as a capital management indicator. This ratio is calculated as total liabilities divided by total equity from the consolidated financial statements. Debt-equity ratio as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, December 31, Total liabilities ￦ 18,576,139 23,510,714 Total equity 12,335,138 24,396,243 Debt-equity ratios 150.60 % 96.37 % (3) Fair value 1) Fair value and carrying amount of financial assets and liabilities including fair value hierarchy as of December 31, 2021 are as follows: (In millions of won) December 31, 2021 Carrying Level 1 Level 2 Level 3 Total Financial assets that are measured at fair value: FVTPL ￦ 1,598,321 55,455 1,359,915 182,951 1,598,321 Derivative hedging instruments 182,661 — 182,661 — 182,661 FVOCI 1,511,605 1,344,434 — 167,171 1,511,605 ￦ 3,292,587 1,399,889 1,542,576 350,122 3,292,587 Financial liabilities that are measured at fair value: FVTPL ￦ 321,025 — — 321,025 321,025 Derivative hedging instruments 111 — 111 — 111 ￦ 321,136 — 111 321,025 321,136 Financial liabilities that are not measured at fair value: Borrowings ￦ 407,185 — 392,237 — 392,237 Debentures 8,426,683 — 8,679,472 — 8,679,472 Long-term payables — other 2,009,833 — 2,010,852 — 2,010,852 ￦ 10,843,701 — 11,082,561 — 11,082,561 2) Fair value and carrying amount of financial assets and liabilities including fair value hierarchy as of December 31, 2020 are as follows: (In millions of won) December 31, 2020 Carrying Level 1 Level 2 Level 3 Total Financial assets that are measured at fair value: FVTPL(*) ￦ 2,622,145 60,473 2,291,355 270,317 2,622,145 Derivative hedging instruments 65,136 — 65,136 — 65,136 FVOCI 1,455,441 885,452 — 569,989 1,455,441 ￦ 4,142,722 945,925 2,356,491 840,306 4,142,722 Financial liabilities that are measured at fair value: FVTPL ￦ 333,099 — — 333,099 333,099 Derivative hedging instruments 42,061 — 42,061 — 42,061 ￦ 375,160 — 42,061 333,099 375,160 Financial liabilities that are not measured at fair value: Borrowings ￦ 2,138,923 — 2,282,316 — 2,282,316 Debentures 8,579,743 — 9,085,324 — 9,085,324 Long-term payables — other 1,566,954 — 1,582,805 — 1,582,805 ￦ 12,285,620 — 12,950,445 — 12,950,445 (*) Some of the financial assets measured at amortized cost were reclassified to financial assets measured at FVTPL. The above information does not include fair values of financial assets and liabilities of which fair values have not been measured as carrying amounts are reasonable approximation of fair values. Fair value of the financial instruments that are traded in an active market (financial assets at FVOCI and financial assets at FVTPL) is measured based on the bid price at the end of the reporting date. The Group uses various valuation methods for determination of fair value of financial instruments that are not traded in an active market. Derivative financial contracts and long-term liabilities are measured using the discounted present value methods. Other financial assets are determined using the methods such as discounted cash flow and market approach. Inputs used to such valuation methods include swap rate, interest rate, and risk premium, and the Group performs valuation using the inputs which are consistent with natures of assets and liabilities measured. Interest rates used by the Group for the fair value measurement as of December 31, 2021 are as follows: Interest rate Derivative instruments 0.32% ~ 3.90% Borrowings and debentures 1.64% ~ 2.33% Long-term payables — other 1.62% ~ 2.39% 3) There have been no transfers between Level 2 and Level 1 for the (In millions of won) Balance at Gain (loss) OCI Acquisition Disposal Transfer Spin-off Balance at December 31, Financial assets FVTPL ￦ 270,317 21,973 7,318 128,517 (75,238 ) (37,564 ) (132,372 ) 182,951 FVOCI(*2) 569,989 — 38,520 11,019 (24,921 ) (369,185 ) (58,251 ) 167,171 ￦ 840,306 21,973 45,838 139,536 (100,159 ) (406,749 ) (190,623 ) 350,122 Financial liabilities FVTPL ￦ (333,099 ) (8,036 ) — (217,736 ) — — 237,846 (321,025 ) (*1) Includes amounts related to discontinued operations. (*2) The transfer for the year ended December 31, 2021 includes W K-net (4) Enforceable master netting agreement or similar agreement Carrying amounts of financial instruments recognized of which offset agreements are applicable as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Gross Amount Net financial Financial assets: Accounts receivable — trade and others ￦ 197,828 (189,424 ) 8,404 Financial liabilities: Accounts payable — other and others ￦ 200,849 (189,424 ) 11,425 (In millions of won) December 31, 2020 Gross Amount Net financial Relevant financial Net Financial assets: Derivative instruments(*) ￦ 8,015 — 8,015 (453 ) 7,562 Accounts receivable — trade and others 317,332 (203,403 ) 113,929 — 113,929 ￦ 325,347 (203,403 ) 121,944 (453 ) 121,491 Financial liabilities: Derivative instruments(*) ￦ 453 — 453 (453 ) — Accounts payable — other and others 301,996 (203,403 ) 98,593 — 98,593 ￦ 302,449 (203,403 ) 99,046 (453 ) 98,593 (*) The balance represents the net amount under the standard terms and conditions of International Swaps and Derivatives Association.

Transactions with Related Parti

Transactions with Related Parties	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Transactions with Related Parties	36. Transactions with Related Parties (1) List of related parties Relationship Company Ultimate Controlling Entity SK Inc. Joint ventures Finnq Co., Ltd. and another Associates SK China Company Ltd. and 42 others Others The Ultimate Controlling Entity’s subsidiaries and associates, etc. For the periods presented, the Group belongs to SK Group, a conglomerate as defined in the Monopoly Regulation and Fair Trade Act of the Republic of Korea (2) Compensation for the key management The Parent Company considers registered directors (2 executive and 5 non-executive (In millions of won) 2021 2020 2019 Salaries ￦ 5,956 10,029 5,969 Defined benefits plan expenses 2,845 3,459 1,237 Share option 146 158 325 ￦ 13,646 7,531 Compensation for the key management includes salaries, non-monetary (3) Transactions with related parties for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 Scope Company Operating Operating Acquisition of Ultimate Controlling Entity SK Inc.(*2) ￦ 33,253 633,868 82,191 Associates F&U Credit information Co., Ltd. 3,828 50,029 — KEB HanaCard Co., Ltd. 17,962 4,374 — SK Wyverns Co., Ltd.(*3) 202 8,203 — Daehan Kanggun BcN Co., Ltd. 10,943 — — SK China Company Ltd.(*4) 131,141 — — Others(*5) 11,778 8,356 — 175,854 70,962 — Others SK Innovation Co., Ltd. 53,445 19,093 — SK Energy Co., Ltd. 18,970 1,250 — SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) 33,435 9 — SK TNS Co., Ltd.(*3) 75 6,868 57,903 SKC Infra Service Co., Ltd.(*3) 26 30,798 8,028 SK Networks Co., Ltd.(*6) 14,439 1,055,512 24 SK Networks Service Co., Ltd. 7,292 73,596 3,520 SK hynix Inc.(*7) 285,104 199 — Happy Narae Co., Ltd. 6,899 20,229 133,625 SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*8) 5,793 18,861 20,382 Content Wavve Co., Ltd. 174 78,964 — Eleven Street Co., Ltd. 2,785 5,699 — SK Planet Co., Ltd. 2,048 16,747 6,081 SK hynix Semiconductor (China) Ltd. 48,546 — — SK hynix system ic (Wuxi) Co., Ltd. 20,807 — — SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.) 38,413 — — SK RENT A CAR Co., Ltd. 5,843 18,564 — DREAMUS COMPANY 795 20,074 396 SK m&service Co., Ltd. 764 3,670 888 UbiNS Co., Ltd. 415 42,335 50,847 Others 156,055 30,762 23,428 702,123 1,443,230 305,122 ￦ 911,230 2,148,060 387,313 (*1) Operating expense and others include lease payments by the Group. (*2) Operating expense and others include ￦ (*3) Transactions occurred before the related party relationship terminated. (*4) Operating revenue and others include ￦ (*5) Operating revenue and others include ￦ (*6) Operating expenses and others include costs for handset purchases amounting to ￦ (*7) Operating revenue and others include ￦ (*8) Operating revenue and others include ￦ (In millions of won) 2020 Scope Company Operating Operating Acquisition Ultimate Controlling Entity SK Inc.(*2) ￦ 40,717 596,509 76,534 Associates F&U Credit information Co., Ltd. 3,484 51,228 — SK hynix Inc.(*3) 316,001 267 — KEB HanaCard Co., Ltd. 683 3,065 — SK Wyverns Co., Ltd. 1,279 19,354 — Content Wavve Co., Ltd. 446 56,631 — Others(*4) 65,431 12,511 78 387,324 143,056 78 Others SK Ecoplant Co., Ltd. 12,349 238 — SK Innovation Co., Ltd. 38,999 18,464 — SK Networks Co., Ltd.(*5) 13,893 1,022,976 32 SK Networks Services Co., Ltd. 6,936 76,653 2,023 SK Telesys Co., Ltd. 388 10,751 30,453 SK TNS Co., Ltd. 1,118 43,767 496,460 SK Energy Co., Ltd. 16,009 296 — SK hynix Semiconductor (China) Ltd. 73,683 — — SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.) 19,394 — — SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) 20,667 9 — SK Global Chemical International Trading (Shanghai) Co., Ltd. 15,898 8 — HappyNarae Co., Ltd. 9,871 17,361 129,621 Others 102,141 128,268 83,693 331,346 1,318,791 742,282 ￦ 759,387 2,058,356 818,894 (*1) Operating expense and others include lease payments by the Group. (*2) Operating expense and others include ￦ (*3) Operating revenue and others include ￦ ￦ (*4) Operating revenue and others include ￦ (*5) Operating expenses and others include costs for handset purchases amounting to ￦ (In millions of won) 2019 Scope Company Operating Operating Acquisition Ultimate Controlling Entity SK Inc.(*2) ￦ 53,507 612,248 95,426 Associates F&U Credit information Co., Ltd. 2,293 55,179 — SK hynix Inc.(*3) 273,047 481 — KEB HanaCard Co., Ltd. 832 1,901 — SK Wyverns Co., Ltd. 1,399 21,528 — Others(*4) 17,286 13,864 457 294,857 92,953 457 Others SK Ecoplant Co., Ltd. 13,339 1,601 7,400 SK Innovation Co., Ltd. 26,697 2,777 — SK Networks Co., Ltd.(*5) 29,321 1,088,443 449 SK Networks Services Co., Ltd. 1,056 76,671 4,979 SK Telesys Co., Ltd. 474 9,686 59,392 SK TNS Co., Ltd. 240 35,824 607,546 SK Energy Co., Ltd. 16,294 516 — SK hynix Semiconductor (China) Ltd. 73,542 — — SK Global Chemical International Trading (Shanghai) Co., Ltd. 14,535 131 — HappyNarae Co., Ltd. 6,943 18,121 168,286 Others 90,307 105,569 109,189 272,748 1,339,339 957,241 ￦ 621,112 2,044,540 1,053,124 (*1) Operating expense and others include lease payments by the Group. (*2) Operating expense and others include ￦ (*3) Operating revenue and others include ￦ (*4) Operating revenue and others include ￦ KIF-Stonebridge (*5) Operating expenses and others include costs for handset purchases amounting to ￦ (4) Account balances with related parties as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Receivables Payables Scope Company Loans Accounts Accounts Ultimate Controlling Entity SK Inc. ￦ — 2,092 69,652 Associates F&U Credit information Co., Ltd. — 4 5,265 Wave City Development Co., Ltd.(*1) — 2,623 — Daehan Kanggun BcN Co., Ltd.(*2) 22,147 3,857 — KEB HanaCard Co., Ltd. — 529 48,020 Others — 84 1,197 22,147 7,097 54,482 Others SK Innovation Co., Ltd. — 3,022 38,022 SK Networks Co., Ltd. — 241 198,631 Mintit Co., Ltd. — 17,929 131 SK hynix Inc. — 11,526 166 Happy Narae Co., Ltd. — 6 49,349 SK m&service Co., Ltd. — 1,453 18,921 SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) — 2,649 24,593 Content Wavve Co., Ltd. — 183 9,873 Incross Co., Ltd. — 3,610 11,829 Eleven Street Co., Ltd. — 2,851 7,782 SK Planet Co., Ltd. — 668 31,652 SK RENT A CAR Co., Ltd. — 116 16,715 UbiNS Co., Ltd. — 24 14,932 Others — 8,307 29,106 — 52,585 451,702 ￦ 22,147 61,774 575,836 (*1) As of December 31, 2021, the Parent Company recognized loss allowance amounting to ￦ (*2) As of December 31, 2021, the Parent Company recognized full loss allowance for the balance of loans to Daehan Kanggun BcN Co., Ltd. (In millions of won) December 31, 2020 Receivables Payables Scope Company Loans Accounts Accounts Ultimate Controlling Entity SK Inc. ￦ — 6,449 64,373 Associates F&U Credit information Co., Ltd. — 10 4,699 SK hynix Inc. — 33,773 128 Wave City Development Co., Ltd.(*1) — 25,782 — Daehan Kanggun BcN Co., Ltd.(*2) 22,147 2,779 — KEB HanaCard Co., Ltd. — 352 145,328 Content Wavve Co., Ltd. — 283 2,491 Others — 9,098 1,686 22,147 72,077 154,332 Others SK Ecoplant Co., Ltd. (Formerly, SK Engineering & Construction Co., Ltd.) — 1,521 152 SK Innovation Co., Ltd. — 11,737 44,105 SK Networks. Co., Ltd. — 2,245 108,233 SK Networks Services Co., Ltd. — 579 7,103 SK Telesys Co., Ltd. — 37 9,253 SK TNS Co., Ltd. — 263 89,915 SK Energy Co., Ltd. — 3,502 1,837 SK hystec Co., Ltd. — 494 6,085 SK hynix Semiconductor (China) Ltd. — 5,896 — SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.) — 2,075 — SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) — 1,142 5 SK Global Chemical International — 795 21 HappyNarae Co., Ltd. — 720 16,534 Others — 15,564 120,575 — 46,570 403,818 ￦ 22,147 125,096 622,523 (*1) As of December 31, 2020, the Parent Company recognized loss allowance amounting to ￦ (*2) As of December 31, 2020, the Parent Company recognized full loss allowance for the balance of loans to Daehan Kanggun BcN Co., Ltd. (5) The Group has granted SK REIT Co., Ltd. the right of first offer regarding the disposal of real estate owned by the Group. Whereby, the negotiation period is within 3 to 5 years from June 30, 2021, date of agreement, and the Group has been granted the right by SK REIT Co., Ltd. to lease the real estate in preference to a third party if SK REIT Co., Ltd. purchases the real estate from the Group. (6) The details of additional investments and disposal of associates and joint ventures for the year ended December 31, 2021 as presented in note 12.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Commitments and Contingencies	37. Commitments and Contingencies (1) Collateral assets and commitments SK Broadband Co., Ltd., a subsidiary of the Parent Company, has pledged its properties as collateral for leases on buildings in the amount of ￦ (2) Legal claims and litigations As of December 31, 2021, the Group is involved in various legal claims and litigation. Provision recognized in relation to these claims and litigation is immaterial. In connection with those legal claims and litigation for which no provision was recognized, management does not believe the Group has a present obligation, nor is it expected any of these claims or litigation will have a significant impact on the Group’s financial position or operating results in the event an outflow of resources is ultimately necessary. (3) Accounts receivable from sale of handsets The sales agents of the Parent Company sell handsets to the Parent Company’s subscribers on an installment basis. The Parent Company entered into comprehensive agreements to purchase accounts receivable from handset sales with retail stores and authorized dealers and to transfer the accounts receivable from handset sales to special purpose companies which were established with the purpose of liquidating receivables, respectively. The accounts receivable from sale of handsets amounting to ￦ ￦

Statements of Cash Flows

Statements of Cash Flows	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Statements of Cash Flows	38. Statements of Cash Flows (1) Adjustments for income and expenses from operating activities for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Interest income ￦ (43,850) (50,357) (63,579) Dividends (14,132) (1,170) (10,011) Gain on foreign currency translations (10,753) (8,928) (4,576) Gain on sale of accounts receivable — other (27,725) (22,605) (15,855) Gain relating to investments in associates and joint ventures, net (1,948,447) (1,028,403) (449,543) Gain on disposal of property and equipment and intangible assets (40,109) (35,644) (8,533) Gain on business transfer (82,248) (12,455) (69,522) Gain relating to financial instruments at FVTPL (91,244) (145,016) (36,336) Other income (10,369) (4,220) (1,875) Interest expense 342,342 399,176 406,087 Loss on foreign currency translations 8,005 12,730 4,948 Loss on disposal of long-term investment securities — 98 — Loss on sale of accounts receivable — other — — 5,823 Income tax expense 651,948 376,502 300,268 Expense related to defined benefit plan 190,462 198,794 175,165 Share option 91,646 4,313 2,073 Bonus paid by treasury shares 29,643 — — Depreciation and amortization 4,114,394 4,169,996 4,021,016 Bad debt for accounts receivables — trade 31,546 48,625 28,841 Loss on disposal of property and equipment and intangible assets 47,369 41,598 47,760 Impairment loss on property and equipment and intangible assets 3,135 208,833 65,935 Bad debt for accounts receivable — other 6,001 10,559 5,802 Loss on impairment of investment assets — — 1,670 Loss relating to financial instruments at FVTPL 76,142 27,082 8,437 Other financial fees 142,015 44,734 — Other expenses 8,008 22,412 21,044 ￦ 3,473,779 4,256,654 4,435,039 (2) Changes in assets and liabilities from operating activities for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Accounts receivable — trade ￦ (95,374 ) (33,410 ) (211,712 ) Accounts receivable — other (152,038 ) (50,003 ) 48,399 Accrued income — — 151 Advanced payments (43,212 ) (945 ) (12,204 ) Prepaid expenses 77,404 112,270 (680,925 ) Inventories (70,601 ) (7,219 ) 115,893 Long-term accounts receivable — other 83,658 26,027 (56,216 ) Contract assets (11,582 ) 1,528 (68,805 ) Guarantee deposits 8,125 26,122 6,392 Accounts payable — trade 12,312 3,023 (23,607 ) Accounts payable — other (109,476 ) 311,737 167,595 Withholdings (55,925 ) 33,348 (31,545 ) Contract liabilities (2,158 ) 35,426 33,574 Deposits received (3,737 ) (1,028 ) (3,112 ) Accrued expenses 7,505 61,848 116,949 Provisions (19,324 ) (30,773 ) (36,478 ) Long-term provisions (260 ) (548 ) (1,699 ) Plan assets (51,697 ) (145,214 ) (130,790 ) Retirement benefit payment (114,897 ) (76,987 ) (84,098 ) Others (27,418 ) 37,256 (3,892 ) ￦ (568,695 ) 302,458 (856,130 ) (3) Significant non-cash (In millions of won) 2021 2020 2019 Increase (decrease) in accounts payable — other relating to the ￦ 1,063,800 (426,723 ) 438,622 Increase of right-of-use 672,723 736,157 1,141,349 Merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd. — 1,072,487 — Change in assets and liabilities by spin-off 14,379,397 — — Retirement of treasury shares 1,965,952 — — Disposal of treasury shares (Congratulatory bonus for spin-off) 114,373 — — (4) Reconciliation of liabilities arising from financing activities for the years ended December 31, 2021 and 20 2 (In millions of won) 2021 Non-cash January 1, 2021 Cash flows Exchange Fair value Business Spin-off Other December 31, Total liabilities from financing activities: Short-term borrowings ￦ 109,998 (50,823 ) — — 1,825 (48,510 ) 508 12,998 Long-term borrowings 2,028,924 63,132 600 — 662 (1,703,300 ) 4,169 394,187 Debentures 8,579,743 (16,755 ) 145,584 — — (295,544 ) 13,655 8,426,683 Lease liabilities 1,436,777 (431,674 ) — — 497 (85,322 ) 614,003 1,534,281 Long-term payables — other 1,566,954 (426,267 ) — — — — 869,146 2,009,833 Derivative financial liabilities 54,176 332 — (42,282 ) — (12,115 ) — 111 Derivative financial assets (65,136 ) — — (117,525 ) — — — (182,661 ) Financial liabilities at FVTPL — 129,123 — 7,996 — (137,119 ) — — ￦ 13,711,436 (732,932 ) 146,184 (151,811 ) 2,984 (2,281,910 ) 1,501,481 12,195,432 Other cash flows from financing activities: Payments of cash dividends ￦ (1,028,520 ) Payments of interest on hybrid bonds (14,766 ) Acquisition of treasury shares (76,111 ) Cash inflow from transactions with the non-controlling 444,124 Cash outflow from transactions with the non-controlling (19,406 ) Cash outflow from spin-off (626,000 ) (1,320,679 ) ￦ (2,053,611 ) (*) The effect of changes in foreign exchange rates for financial liabilities at amortized cost. (In millions of won) 2020 January 1, Cash flows Non-cash Exchange Fair value Business combinations Other December 31, Total liabilities from financing activities: Short-term borrowings ￦ 20,603 76,375 13,020 — — — 109,998 Long-term borrowings 2,022,537 (3,026 ) (14,208 ) — — 23,621 2,028,924 Debentures 8,220,833 445,462 (94,391 ) — — 7,839 8,579,743 Lease liabilities 1,291,007 (412,666 ) — — 7,696 550,740 1,436,777 Long-term payables — other 1,971,609 (428,100 ) — — — 23,445 1,566,954 Derivative financial liabilities 1,043 8,191 — 44,942 — — 54,176 Derivative financial assets (144,886 ) 28,500 — 51,250 — — (65,136 ) ￦ 13,382,746 (285,264 ) (95,579 ) 96,192 7,696 605,645 13,711,436 Other cash flows from financing activities: Payments of cash dividends ￦ (742,136) Payments of interest on hybrid bonds (14,766 ) Acquisition of treasury shares (426,664 ) Cash inflow from transactions with the non-controlling 17,766 Cash outflow from transactions with the non-controlling (6,515 ) (1,172,315 ) ￦ (1,457,579 ) (*) The effect of changes in foreign exchange rates for financial liabilities at amortized cost.

Emissions Liabilities

Emissions Liabilities	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Emissions Liabilities	39. Emissions Liabilities (1) The quantity of emissions rights allocated free of charge for each implementation year as of December 31, 2021 are as follows: (In tCO2-eQ) Quantities allocated in 2019 Quantities Quantities Total Emissions rights allocated free of charge 815,927 814,842 1,033,764 2,664,533 (2) Changes in emissions rights quantities the Parent Company held are as follows: (In tCO2-eQ) Quantities allocated in Quantities Quantities Total January 1 (2,343 ) (60,977 ) — (63,320 ) Allocation at no cost 815,927 814,842 1,033,764 2,664,533 Additional allocation 131,015 217,643 — 348,658 Purchase — 68,471 — 68,471 Surrender or shall be surrendered (1,005,576 ) (1,039,979 ) (1,087,455 ) (3,133,010 ) Borrowing 60,977 — — 60,977 December 31 — — (53,691 ) (53,691 ) (3) As of December 31, 2021, the estimated annual greenhouse gas emissions quantities of the Parent Company are 1,087,455 tCO2-eQ.

Non-current Assets Held for Sal

Non-current Assets Held for Sale	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Non-current Assets Held for Sale	40. Non-current On February 25, 2021, the Parent Company has decided to dispose of the investments in an associate engaged in mobility business to T map Mobility Co., Ltd. pursuant to the approval of the Board of Directors and reclassified entire shares of the investments in associates as non-current (In millions of won) December 31, 2021 Investments in associates Carrot General Insurance Co., Ltd. ￦ 8,734

Spin-Off

Spin-Off	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Spin Off	41. Spin-off (1) In accordance with the resolution of the Board of Directors held on June 10, 2021 and shareholders’ meeting held on October 12, 2021, the Parent Company completed the spin-off spin-off spin-off Method of spin-off Horizontal spin-off Company SK Telecom Co., Ltd. (Surviving Company) SK Square Co., Ltd. (Spin-off Company) Effective date of spin-off November 1, 2021 (2) The details of financial information due to the spin-off 1) Statements of Income The details of profit or loss from discontinued operations for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Operating revenue and other operating income ￦ 2,469,329 2,541,133 2,331,433 Revenue 2,383,083 2,536,904 2,324,285 Other income 86,246 4,229 7,148 Operating expenses: 2,396,324 2,471,519 2,311,229 Labor 824,505 897,676 840,809 Commission 349,344 244,074 235,384 Depreciation and amortization 287,412 326,417 315,678 Network interconnection 863 762 1,099 Advertising 158,512 159,589 154,715 Rent 2,754 2,115 2,254 Cost of goods sold 426,161 502,469 455,257 Others 346,773 338,417 306,033 Operating profit 73,005 69,614 20,204 Finance income 47,417 100,511 20,464 Finance costs 269,823 174,250 103,044 Gain relating to investments in subsidiaries, associates and joint ventures, 1,502,147 975,947 416,344 Profit before income tax 1,352,746 971,822 353,968 Income tax expense 205,152 155,240 37,328 Profit for the year ￦ 1,147,594 816,582 316,640 2) Statements of Cash Flows The details of cash flows from discontinued operations for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Cash flows from operating activities ￦ 59,255 495,696 196,518 Cash flows from investing activities (967,053 ) (483,599 ) (189,064 ) Cash flows from investing activities (88,872 ) (22,902 ) (35,395 ) (3) Subsequent to the spin-off, the Parent Company lost control over the related businesses. The spin-off was accounted for by derecognizing all related assets and liabilities. The net assets of the spin-off business as of spin-off date was recognized in Capital surplus and others. The details of assets and liabilities derecognized from the financial statements due to the spin-off (In millions of won) Amount Current assets ￦ 2,608,601 Non-current 19,269,615 Total assets ￦ 21,878,216 Current liabilities ￦ 2,161,458 Non-current 4,676,324 Total liabilities ￦ 6,837,782 Net assets ￦ 15,040,434 (4) The Parent Company has obligation to jointly and severally reimburse the Parent Company’s liabilities incurred prior to the spin-off spin-off 530-9

Cash Dividends paid to the Pare

Cash Dividends paid to the Parent Company	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Cash Dividends paid to the Parent Company	42. Cash Dividends paid to the Parent Company Cash dividends paid to the Parent Company for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Cash dividends received from consolidated subsidiaries ￦ 12,646 119,036 287,549 Cash dividends received from associates 312,793 164,850 227,500 ￦ 325,439 283,886 515,049

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	43. Subsequent Events On January 20, 2022, the Board of Directors of the Parent Company approved the disposal of treasury shares. The disposal of treasury shares has been completed and the details are as follows: Information of disposal Number of treasury shares to be disposed 413,080 Common shares Price of the treasury shares to be disposed per share (in won) ￦ Aggregate disposal value ￦ Disposal date January 24, 2022 Purpose of disposal Allotment of shares as bonus payment Method of disposal Over-the-counter

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Operating segments	(1) Operating segments An operating segment is a component of the Group that engages in business activities from which it may earn revenues and incur expenses, including revenues and expenses that relate to transactions with any of the Group’s other components. The Group’s operating segments have been determined to be each business unit, for which the Group generates separately identifiable financial information that is regularly reported to the chief operating decision maker for the purpose of resource allocation and assessment of segment performance. The Group has three reportable segments as described in note 4. Segment results that are reported to the chief operating decision maker include items directly attributable to a segment as well as those that can be allocated on a reasonable basis.
Basis of consolidation	(2) Basis of consolidation (a) Business combination A business combination is accounted for by applying the acquisition method, unless it is a combination involving entities or businesses under common control. In determining whether a particular set of activities and assets is a business, the Group assesses whether the set of assets and activities acquired includes, at a minimum, an input and substantive process and whether the acquired set has the ability to produce outputs. The Group has an option to apply a ‘concentration test’ that permits a simplified assessment of whether an acquired set of activities and assets is not a business. The optional concentration test is met if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. Consideration transferred is generally measured at fair value, identical to the measurement of identifiable net assets acquired at fair value. The difference between the acquired company’s fair value and the consideration transferred is accounted for goodwill. Any goodwill that arises is tested annually for impairment. Any gain on a bargain purchase is recognized in profit or loss immediately. Acquisition-related costs are expensed in the periods in which the costs are incurred and the services are received, except if related to the costs to issue debt or equity securities recognized based on IAS 32 and IFRS 9. Consideration transferred does not include the amount settled in relation to the pre-existing Contingent consideration is measured at fair value at the acquisition date. Contingent consideration classified as equity is not remeasured and its subsequent settlement is accounted for within equity. If contingent consideration is not classified as equity, the Group subsequently recognizes changes in fair value of contingent consideration through profit or loss. (b) Non-controlling Non-controlling Changes in a Controlling Company’s ownership interest in a subsidiary that do not result in the Controlling Company losing control of the subsidiary are accounted for as equity transactions. (c) Subsidiaries Subsidiaries are entities controlled by the Group. The Group controls an investee when it is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. Consolidation of an investee begins from the date the Group obtains control of the investee and cease when the Group loses control of the investee. (d) Loss of control If the Group loses control of a subsidiary, the Group derecognizes the assets and liabilities of the former subsidiary from the consolidated statement of financial position and recognizes gain or loss associated with the loss of control attributable to the former controlling interest. Any investment retained in the former subsidiary is recognized at its fair value when control is lost. (e) Interest in investees accounted for using the equity method Interest in investees accounted for using the equity method composed of interest in associates and joint ventures. An associate is an entity in which the Group has significant influence, but not control, over the entity’s financial and operating policies. A joint venture is a joint arrangement whereby the Group that has joint control of the arrangement has rights to the net assets of the arrangement. The investment in an associate and a joint venture is initially recognized at cost including transaction costs and the carrying amount is increased or decreased to recognize the Group’s share of the profit or loss and changes in equity of the associate or the joint venture after the date of acquisition. (f) Intra-group transactions Intra-group balances and transactions, and any unrealized income and expenses arising from intra-group transactions, are eliminated in preparing the consolidated financial statements. The Group’s share of unrealized gain incurred from transactions with investees accounted for using the equity method are eliminated and unrealized loss are eliminated using the same basis if there are no evidence of asset impairments. (g) Business combinations under common control SK Inc. is the ultimate controlling entity of the Group. The assets and liabilities acquired under business combination under common control are recognized at the carrying amounts in the ultimate controlling shareholder’s consolidated financial statements. The difference between consideration and carrying amount of net assets acquired is added to or subtracted from capital surplus and others.
Cash and cash equivalents	(3) Cash and cash equivalents Cash and cash equivalents comprise cash balances, call deposits and investment securities with maturities of three months or less from the acquisition date that are easily convertible to cash and subject to an insignificant risk of changes in their fair value.
Inventories	(4) Inventories Inventories are initially recognized at the acquisition cost and subsequently measured using the weighted average method. During the period, a perpetual inventory system is used to track inventory quantities, which is adjusted based on the physical inventory counts performed at the period end. When the net realizable value of inventories is less than cost, the carrying amount is reduced to the net realizable value, and any difference is charged to current period as operating expenses.
Derivative financial instruments, including hedge accounting	(6) Derivative financial instruments, including hedge accounting Derivatives are initially recognized at fair value. Subsequent to initial recognition, derivatives are measured at fair value at the end of each reporting period, and changes therein are accounted for as described below. (a) Hedge accounting The Group holds forward exchange contracts, interest rate swaps, currency swaps and other derivative contracts to manage interest rate risk and foreign exchange risk. The Group designates derivatives as hedging instruments to hedge the variability in cash flow associated with highly probable forecasted transactions or firm commitments (a cash flow hedge). On initial designation of the hedge, the Group formally documents the relationship between the hedging instrument(s) and hedged item(s), including the risk management objectives and strategy in undertaking the hedge transaction, together with the methods that will be used to assess the effectiveness of the hedging relationship. Hedges directly affected by interest rate benchmark reform When uncertainty arises about the interest rate benchmark designated as a hedged risk and the timing or the amount of the interest rate benchmark-based For a cash flow hedge of a forecast transaction, the Group assumes that the benchmark interest rate will not be altered as a result of interest rate benchmark reform for the purpose of assessing whether the forecast transaction is highly probable and determining whether a previously designated forecast transaction in a discontinued cash flow hedge is still expected to occur. The Group will cease applying the specific policy for assessing the economic relationship between the hedged item and the hedging instrument • to a hedged item or hedging instrument when the uncertainty arising from interest rate benchmark reform is no longer present with respect to the timing and the amount of the interest rate benchmark-based • when the hedging relationship is discontinued. When the basis for determining the contractual cash flows of the hedged item or hedging instrument changes as a result of IBOR reform and therefore there is no longer uncertainty arising about the cash flows of the hedged item or the hedging instrument, the Group amends the hedge documentation of that hedging relationship to reflect the change(s) required by IBOR reform. The Group amends the formal hedge documentation by the end of the reporting period during which a change required by IBOR reform is made to the hedged risk, hedged item or hedging instrument. These amendments in the formal hedge documentation do not constitute the discontinuation of the hedging relationship or the designation of a new hedging relationship. If changes are made in addition to those changes required by interest rate benchmark reform to the financial asset or financial liability designated in a hedging relationship or to the designation of the hedging relationship, the Group determines whether those additional changes result in the discontinuation of hedging accounting. If the additional changes do not result in the discontinuation of hedging accounting, the Group amend the formal designation of the hedging relationship. When the interest rate benchmark on which the hedged future cash flows had been based is changed as required by IBOR reform, for the purpose of determining whether the hedged future cash flows are expected to occur, the Group deems that the hedging reserve recognized in OCI for that hedging relationship is based on the alternative benchmark rate on which the hedged future cash flows will be based. Cash flow hedge When a derivative is designated to hedge the variability in cash flows attributable to a particular risk associated with a recognized asset or liability or a highly probable forecasted transaction that could affect profit or loss, the effective portion of changes in the fair value of the derivative is recognized in other comprehensive income, net of tax, and presented in the hedging reserve in equity. Any ineffective portion of changes in the fair value of the derivative is recognized immediately in profit or loss. If the hedging instrument no longer meets the criteria for hedge accounting, expires or is sold, terminated, exercised, or the designation is revoked, then hedge accounting is discontinued prospectively. The cumulative gain or loss on the hedging instrument that has been recognized in other comprehensive income is reclassified to profit or loss in the periods during which the forecasted transaction occurs. If the forecasted transaction is no longer expected to occur, then the balance in other comprehensive income is recognized immediately in profit or loss. (b) Other derivative financial instruments Other derivative financial instrument not designated as a hedging instrument are measured at fair value, and the changes in fair value of the derivative financial instrument is recognized immediately in profit or loss.
Property and equipment	(7) Property and equipment Property and equipment are initially measured at cost. The cost of property 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. Property and equipment, subsequently, are carried at cost less accumulated depreciation and accumulated impairment losses. Subsequent costs are recognized in the carrying amount of property and equipment at cost or, if appropriate, as a separate item if it is probable that future economic benefits associated with the item will flow to the Group and the cost of the item can be reliably measured. The carrying amount of the replaced part is derecognized. The costs of the day-to-day Property 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. A component that is significant compared to the total cost of property and equipment is depreciated over its separate useful life. Gains and losses on disposal of an item of property and equipment are determined by comparing the proceeds from disposal with the carrying amount of property and equipment and are recognized as other non-operating The estimated useful lives of the Group’s property and equipment are as follows: Useful lives (years) Buildings and structures 15 ~ 40 Machinery 3 ~ 15, 30 Other property and equipment 3~10 Right-of-use 1 ~ 50 Depreciation methods, useful lives, and residual values are reviewed at the end of each reporting date and adjusted, if appropriate. The change is accounted for as a change in an accounting estimate.
Borrowing costs	(8) Borrowing costs The Group 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. Financial assets are not qualifying assets, and assets that are ready for their intended use or sale when acquired are not qualifying assets either. To the extent that the Group borrows funds specifically for the purpose of obtaining a qualifying asset, the Group determines the amount of borrowing costs eligible for capitalization as the actual borrowing costs incurred on that borrowing during the period less any investment income on the temporary investment of those borrowings. To the extent that the Group borrows funds generally and uses them for the purpose of obtaining a qualifying asset, the Group determines the amount of borrowing costs eligible for capitalization by applying a capitalization rate to the expenditures on that asset. The capitalization rate is the weighted average of the borrowing costs applicable to the borrowings of the Group that are outstanding during the period other than borrowings made specifically for the purpose of obtaining a qualifying asset. The amount of borrowing costs that the Group capitalizes during a period do not exceed the amount of borrowing costs incurred during the period.
Intangible assets	(9) Intangible assets Intangible assets are measured initially at cost and, subsequently, are carried at cost less accumulated amortization and accumulated impairment losses. Intangible assets, except for goodwill, are amortized on a straight-line basis over the estimated useful lives of intangible assets from the date that they are available for use. The residual value of intangible assets is zero. However, club memberships and brand are expected to be available for use as there are no foreseeable limits to the periods. These intangible assets are determined as having indefinite useful lives and, therefore, not amortized. The estimated useful lives of the Group’s intangible assets are as follows: Useful lives (years) Frequency usage rights 2.9 ~ 10 Land usage rights 5 Industrial rights 5, 10 Development costs 5 Facility usage rights 10, 20 Customer relations 3 ~ 15 Other 3 ~ 20 Amortization periods and the amortization methods for intangible assets with finite useful lives are reviewed at the end of each reporting period. The useful lives of intangible assets that are not being amortized are reviewed at the end of each reporting period to determine whether events and circumstances continue to support indefinite useful life assessments for those assets. Changes, if appropriate, are accounted for as changes in accounting estimates. Expenditures on research activities are recognized in profit or loss as incurred. Development expenditures are capitalized only if development costs can be reliably measured, the product or process is technically and commercially feasible, future economic benefits are probable, and the Group intends to and has sufficient resources to complete development and to use or sell the asset. Other development expenditures are recognized in profit or loss as incurred. Subsequent expenditures are capitalized only when they increase the future economic benefits embodied in the specific asset to which it relates. All other expenditures, including expenditures on internally generated goodwill and brands, are recognized in profit or loss as incurred.
Government grants	(10) Government grants Government grants are not recognized unless there is reasonable assurance that the Group will comply with the grant’s conditions and that the grant will be received. 1) Grants related to assets Government grants whose primary condition is that the Group purchases, constructs, or otherwise acquires a long-term asset 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 reduction to depreciation expense. 2) Grants related to income Government grants which are intended to compensate the Group for expenses incurred are deducted from the related expenses.
Investment property	(11) Investment property Investment properties are properties held to earn rentals and/or for capital appreciation. Investment properties are measured initially at cost, including transaction costs. Subsequent to initial recognition, investment properties are reported at cost less accumulated depreciation and accumulated impairment losses. Subsequent expenditures are recognized in carrying amount of an asset or as a separate asset if it is probable that future economic benefits associated with the assets will flow into the Group and the cost of an asset can be measured reliably. The carrying amount of those parts that are replaced is derecognized. The costs associated with routine maintenance and repairs are recognized in profit or loss as incurred. Investment property, except for land, is depreciated on a straight-line basis over estimated useful lives of 30 years. In addition, right-of-use straight-line The depreciation method, estimated useful lives and residual values are reviewed at the end of each reporting date and adjusted, if appropriate. The change is accounted for as a change in an accounting estimate.
Impairment of non-financial assets	(12) Impairment of non-financial The carrying amounts of the Group’s non-financial non-current The Group estimates the recoverable amount of an individual asset, and if it is impossible to measure the individual recoverable amount of an asset, the Group estimates the recoverable amount of cash-generating unit (“CGU”). A CGU is the smallest identifiable group of assets that generates cash inflows that are largely independent of the cash inflows from other assets or groups of assets. The recoverable amount of an asset or CGU is the greater of its value in use and its fair value less costs to sell. The value in use is estimated by applying a pre-tax An impairment loss is recognized in profit or loss to the extent the carrying amount of the asset exceeds its recoverable amount. Goodwill acquired in a business combination is allocated to each CGU that is expected to benefit from the synergy arising from the business acquired. Any impairment identified at the CGU level will first reduce the carrying amount 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.
Leases	(13) Leases A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. (a) As a lessee At commencement or on modification of a contract that contains a lease component, the Group allocates the consideration in the contract to each lease component on the basis of its relative stand-alone prices. However, the Group has elected not to separate non-lease non-lease The Group recognizes a right-of-use right-of-use The right-of-use straight-line right-of-use right-of-use right-of-use The lease liability is initially measured at the present value of the lease payments that are not paid at the commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be readily determined, the Group’s incremental borrowing rate. Generally, the Group uses its incremental borrowing rate as the discount rate. The Group determines its incremental borrowing rate by obtaining interest rates from various external financing sources and makes certain adjustments to reflect the terms of the lease and type of the asset leased. Lease payments included in the measurement of the lease liability comprise the following: • fixed payments, including in-substance • variable lease payments that depend on an index or a rate, initially measured using the index or rate as at the commencement date • amounts expected to be payable under a residual value guarantee • the exercise price under a purchase option that the Group is reasonably certain to exercise, lease payments in an optional renewal period if the Group is reasonably certain to exercise an extension option, and penalties for early termination of a lease unless the Group is reasonably certain not to terminate early. The lease liability is measured at amortized cost using the effective interest method. It is remeasured when there is a change in future lease payments arising from a change in an index or rate, if there is a change in the Group’s estimate of the amount expected to be payable under a residual value guarantee, if the Group changes its assessment of whether it will exercise a purchase, extension or termination option or if there is a revised in-substance When the lease liability is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right-of-use right-of-use The Group presents right-of-use The Group has elected not to recognize right-of-use low-value straight-line (b) As a lessor At inception or on modification of a contract that contains a lease component, the Group allocates the consideration in the contract to each lease component on the basis of their relative stand-alone prices. When the Group acts as a lessor, it determines at lease inception whether each lease is a finance lease or an operating lease. To classify each lease, the Group makes an overall assessment of whether the lease transfers substantially all of the risks and rewards incidental to ownership of the underlying asset. If this is the case, then the lease is a finance lease; if not, then it is an operating lease. As part of this assessment, the Group considers certain indicators such as whether the lease is for the major part of the economic life of the asset. When the Group is an intermediate lessor, is accounts for its interests in the head lease and the sub-lease sub-lease right-of-use sub-lease If an arrangement contains lease and non-lease The Group applies derecognition and impairment requirements in IFRS 9 to the net investment in the lease. The Group further regularly reviews estimated unguaranteed residual values used in calculating the gross investment in the lease. The Group recognizes lease payments received under operating leases as income on a straight-line basis over the lease term as part of ‘other revenue’.
Non-current assets held for sale	(14) Non-current Non-current non-current Impairment of Assets A non-current
Non-derivative financial liabilities	(15) Non-derivative The Group classifies non-derivative (a) Financial liabilities at fair value through profit or loss Financial liabilities at fair value through profit or loss include financial liabilities held for trading or designated as such upon initial recognition. Subsequent to initial recognition, these liabilities are measured at fair value. The amount of change in fair value of financial liability that is attributable to changes in the credit risk of that liability shall be presented in other comprehensive income, and the remaining amount of change in the fair value of the liability shall be presented in profit or loss. Upon initial recognition, transaction costs that are directly attributable to the issue of the financial liability are recognized in profit or loss as incurred. (b) Other financial liabilities Non-derivative (c) Derecognition of financial liability The Group extinguishes a financial liability only when the contractual obligation is fulfilled, canceled or expires. The Group recognizes new financial liabilities at fair value based on new contracts and eliminates existing liabilities when the contractual terms of the financial liabilities change and the cash flows change substantially. When a financial liability is derecognized, the difference between the carrying amount and the consideration paid (including any transferred non-cash
Employee benefits	(16) Employee benefits (a) Short-term employee benefits Short-term employee benefits are employee benefits that are due to be settled within 12 months after the end of the period in which the employees render related services. When an employee has rendered a service to the Group during an accounting period, the Group recognizes the undiscounted amount of short-term employee benefits expected to be paid in exchange for that service. (b) Other long-term employee benefits Other long-term employee benefits include employee benefits that are settled beyond 12 months after the end of the period in which the employees render related services. The Group’s net obligation in respect of long-term employee benefits is the amount of future benefit that employees have earned in return for their service in the current and prior periods. That benefit is discounted to determine its present value. Remeasurements are recognized in profit or loss in the period in which they arise. (c) Retirement benefits: defined contribution plans When an employee has rendered a service to the Group during a period, the Group recognizes the contribution payable to a defined contribution plan in exchange for that service as a liability (accrued expense), after deducting any contribution already paid. If the contribution already paid exceeds the contribution due for service before the end of the reporting period, the Group recognizes that excess as an asset (prepaid expense) to the extent that the prepayment will lead to a reduction in future payments or a cash refund. (d) Retirement benefits: defined benefit plans At the end of reporting period, defined benefit liabilities relating to defined benefit plans are recognized at present value of defined benefit obligations net of fair value of plan assets. The calculation is performed annually by an independent actuary using the projected unit credit method. When the fair value of plan assets exceeds the present value of the defined benefit obligation, the Group recognizes an asset, to the extent of the present value of any economic benefits available in the form of refunds from the plan or reduction in the future contributions to the plan. Remeasurements of the net defined benefit liability (asset), which comprise actuarial gains and losses, the return on plan assets (excluding interest) and the effect of the asset ceiling (if any, excluding interest), are recognized immediately in other comprehensive income. The Group determines net interests on net defined benefit liability (asset) by multiplying discount rate determined at the beginning of the annual reporting period and considers changes in net defined benefit liability (asset) from contributions and benefit payments. Net interest costs and other costs relating to the defined benefit plan are recognized through profit or loss. When the plan amendment or curtailment occurs, gains or losses on amendment or curtailment in benefits for the past service provided are recognized through profit or loss. The Group recognizes a gain or loss on a settlement when the settlement of defined benefit plan occurs. (e) Termination benefits The Group recognizes a liability and expense for termination benefits at the earlier of the period when the Group can no longer withdraw the offer of those benefits and the period when the Group recognizes costs for a restructuring that involves the payment of termination benefits. If benefits are payable more than 12 months after the reporting period, they are discounted to their present value.
Provisions	(17) Provisions Provisions are recognized when the Group 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. If the effect of the time value of money is material, provisions are determined at the present value of the expected future cash flows. If some or all of the expenditures required to settle a provision are expected to be reimbursed by another party, the reimbursement is recognized when, and only when, it is virtually certain that reimbursement will be received if the entity settles the obligation. The reimbursement is 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. A provision is used only for expenditures for which the provision was originally recognized.
Emissions Rights	(18) Emissions Rights The Group accounts for greenhouse gases emission right and the relevant liability as below pursuant to the Act on Allocation and Trading of Greenhouse Gas Emission in Korea. 1) Greenhouse Gases Emission Right Greenhouse Gases Emission Right consists of emission allowances, which are allocated from the government free of charge or purchased from the market. The cost includes any directly attributable costs incurred during the normal course of business. The Group derecognizes an emission right asset when the emission allowance is unusable, disposed or submitted to government in which the future economic benefits are no longer expected to be probable. 2) Emissions liability Emission liability is a present obligation of submitting emission rights to the government with regard to emission of greenhouse gas. The emission liability is measured based on the expected quantity of emission for the performing period in excess of emission allowance in possession and the unit price for such emission rights in the market at the end of the reporting period. The emissions liabilities are derecognized when they are surrendered to the government.
Transactions in foreign currencies	(19) Transactions in foreign currencies (a) Foreign currency transactions Transactions in foreign currencies are translated to the functional currency of the Group at exchange rates at the dates of the transactions. Monetary assets and liabilities denominated in foreign currencies are retranslated to the functional currency using the exchange rate at the reporting date. Non-monetary Exchange differences arising from monetary items except for financial liabilities designated cashflow hedging instruments are recognized in profit or loss. If a gain or loss on a non-monetary item is recognized in other comprehensive income, any foreign exchange differences are also recognized in other comprehensive income. When a gain or loss on a non-monetary item is recognized in profit or loss, any foreign exchange differences are also recognized in profit or loss. (b) Foreign operations If the presentation currency of the Group is different from a foreign operation’s functional currency, the financial statements of the foreign operation are translated into the presentation currency using the following methods: The assets and liabilities of foreign operations, whose functional currency is not the currency of a hyperinflationary economy, are translated to presentation currency at exchange rates at the reporting date. The income and expenses of foreign operations are translated to functional currency at exchange rates at the dates of the transactions. Foreign currency differences are recognized in other comprehensive income. 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 is treated as assets and liabilities of the foreign operation. Thus, they are expressed in the functional currency of the foreign operation and translated at the closing rate at the reporting date. When a foreign operation is disposed, the relevant amount in the translation is transferred to profit or loss as part of the profit or loss on disposal. On the partial disposal of a subsidiary that includes a foreign operation, the relevant proportion of such cumulative amount is reattributed to non-controlling
Share capital	(20) Share capital Ordinary shares are classified as equity. Incremental costs directly attributable to the issuance of ordinary shares and share options are recognized as a deduction from equity, net of any tax effects. When the Parent Company repurchases its own shares, the amount of the consideration paid is recognized as a deduction from equity and classified as treasury shares. The gains or losses from the purchase, disposal, reissue, or retirement of treasury shares are directly recognized in equity being as transaction with owners.
Hybrid bond	(21) Hybrid bond The Group recognizes a financial instrument issued by the Group as an equity instrument if it does not include contractual obligation to deliver financial assets including cash to the counter party.
Share-based payment	(22) Share-based payment For equity- settled share-based payment transaction, if the fair value of the goods or services received cannot be reliably estimated, the Group measures the value indirectly by reference to the fair value of the equity instruments granted. The related expense with a corresponding increase in capital surplus and others is recognized over the vesting period of the awards. The amount recognized as an expense is adjusted to reflect the number of awards for which the related service and non-market non-market The fair value of the amount payable to employees in respect of share appreciation rights, which are settled in cash, is recognized as an expense with a corresponding increase in liabilities, over the period in which the employees become unconditionally entitled to payment. The liability is remeasured at each reporting date and at settlement date based on the fair value of the share appreciation rights. Any changes in the fair value of the liability are recognized in profit or loss.
Finance income and finance costs	(24) Finance income and finance costs Finance income comprises interest income on funds invested (including financial assets measured at fair value), dividend income, gains on disposal of financial assets at FVTPL, changes in fair value of financial instruments at FVTPL, and gains on hedging instruments that are recognized in profit or loss. Interest income is recognized as it accrues in profit or loss, using the effective interest rate method. Dividend income is recognized in profit or loss when the right to receive the dividend is established. Finance costs comprise interest expense on borrowings, changes in fair value of financial instruments at FVTPL, and losses on hedging instruments that are recognized in profit or loss. Interest expense on borrowings and debentures is recognized as it accrues in profit or loss using the effective interest rate method.
Income taxes	(25) 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 OCI. The Group pays income tax in accordance with the tax-consolidation (a) 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 includes interests and fines related to income taxes paid or payable. 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 (b) Deferred tax Deferred tax is recognized by 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. The Group recognizes a deferred tax liability for all taxable temporary differences, except for the difference associated with investments in subsidiaries and associates that the Group 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 Group recognizes a deferred tax asset for all deductible temporary differences 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. A deferred tax asset is recognized for the carryforward of unused tax losses and unused tax credits to the extent that it is probable that future taxable profit will be available against which the unused tax losses and unused tax credits can be utilized. Future taxable profit is dependent on the reversal of taxable temporary differences. If there are insufficient taxable temporary differences to recognize the deferred tax asset, the business plan of the Group and the reversal of existing temporary differences are considered in determining the future taxable profit. The Group reviews the carrying amount of a deferred tax asset 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 Group 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 the Group has a legally enforceable right to offset the amount recognized and intends to settle the current tax liabilities and assets on a net basis. Income tax expense in relation to dividend payments is recognized when liabilities relating to the dividend payments are recognized. (c) Uncertainty over income tax treatments The Group assesses the uncertainty over income tax treatments pursuant to IAS 12. If the Group concludes it is not probable that the taxation authority will accept an uncertain tax treatment, the Group reflects the effect of uncertainty for each uncertain tax treatment by using either of the following methods, depending on which method the entity expects to better predict the resolution of the uncertainty: • The most likely amount: the single most likely amount in a range of possible outcomes. • The expected value: the sum of the probability-weighted
Earnings per share	(26) Earnings per share The Group presents basic and diluted earnings per share (EPS) data for its ordinary shares. Basic EPS is calculated by dividing the profit or loss attributable to ordinary shareholders of the Parent Company by the weighted average number of ordinary shares outstanding during the period, adjusted for own shares held. Diluted EPS is determined by adjusting the profit or loss attributable to ordinary shareholders and the weighted average number of ordinary shares outstanding, adjusted for own shares held, for the effects of all dilutive potential ordinary shares, which comprise share options granted to employees, if any.
Discontinued operation	(27) Discontinued operation A discontinued operation is a component of the Group’s business, the operations and cash flows of which can be clearly distinguished from the rest of the Group and which: • represents a separate major line of business or geographic area of operations; • is part of a single co-ordinated • is a subsidiary acquired exclusively with a view to resale. When an operation is classified as a discontinued operation, the comparative statements of income are re-presented
Standards issued but not yet effective	(28) Standards issued but not yet effective The following new and amended standards are effective for annual periods beginning after January 1, 2021. The following new and amended standards are not expected to have a significant impact on the Group’s consolidated financial statements. • Onerous Contracts — Cost of Fulfilling a Contract (Amendments to IAS 37). • Deferred Tax related to Assets and Liabilities arising from a Single Transaction (Amendments to IAS 12) • COVID-19-Related • Reference to Conceptual Framework (Amendments to IFRS 3). • Annual Improvements to IFRS Standards 2018-2020. • Property, Plant and Equipment: Proceeds before Intended Use (Amendments to IAS 16). • Classification of Liabilities as Current or Non-current • IFRS 17 Insurance Contracts Insurance Contracts • Disclosure of Accounting Polices (Amendments to IAS 1). • Definition of Accounting Estimates (Amendments to IAS 8).
Previously stated [member]
Statement [LineItems]
Financial assets - Policies applicable from January 1, 2018	(5) Non-derivative (a) Recognition and initial measurement Accounts receivable — trade and debt investments issued are initially recognized when they are originated. All other financial assets and financial liabilities are initially recognized when the Group becomes a party to the contractual provisions of the instrument. A financial asset (unless an accounts receivable — trade without a significant financing component) or financial liability is initially measured at fair value plus, for an item not at FVTPL, transaction costs that are directly attributable to its acquisition or issue. An accounts receivable — trade without a significant financing component is initially measured at the transaction price. (b) Classification and subsequent measurement On initial recognition, a financial asset is classified as measured at: • FVTPL • FVOCI — equity investment • FVOCI — debt investment • Financial assets at amortized cost A financial asset is classified based on the business model in which a financial asset is managed and its contractual cash flow characteristics. Financial assets are not reclassified subsequent to their initial recognition unless the Group changes its business model for managing financial assets, in which case all affected financial assets are reclassified on the first day of the first reporting period following the change in the business model. A financial asset is measured at amortized cost if it meets both of the following conditions and is not designated as at FVTPL: • it is held within a business model whose objective is to hold assets to collect contractual cash flows; and • its contractual terms give rise to cash flows that are solely payments of principal and interest on the principal amount outstanding on specified dates. A debt investment is measured at FVOCI if it meets both of the following conditions and is not designated as at FVTPL: • it is held within a business model whose objective is achieved by both collecting contractual cash flows and selling financial assets; and • its contractual terms give rise to cash flows that are solely payments of principal and interest on the principal amount outstanding on specified dates. On initial recognition of an equity investment that is not held for trading, the Group may irrevocably elect to present subsequent changes in the investment’s fair value in other comprehensive income (“OCI”). This election is made on an investment-by-investment All financial assets not classified as measured at amortized cost or FVOCI as described above are measured at FVTPL. This includes all derivative financial assets. On initial recognition, the Group may irrevocably designate a financial asset that otherwise meets the requirements to be measured at amortized cost or at FVOCI as at FVTPL if doing so eliminates or significantly reduces an accounting mismatch that would otherwise arise. The following accounting policies are applied to the subsequent measurement of financial assets. Financial assets at FVTPL These assets are subsequently measured at fair value. Net gains and losses, including any interest or dividend income, are recognized in profit or loss. Financial assets at amortized cost These assets are subsequently measured at amortized cost using the effective interest method. The amortized cost is reduced by impairment losses. Interest income, foreign exchange gains and losses and impairment are recognized in profit or loss. Any gain or loss on derecognition is recognized in profit or loss. Debt investments at FVOCI These assets are subsequently measured at fair value. Interest income calculated using the effective interest method, foreign exchange gains and losses and impairment are recognized in profit or loss. Other net gains and losses are recognized in OCI. On derecognition, gains and losses accumulated in OCI are reclassified to profit or loss. Equity investments at FVOCI These assets are subsequently measured at fair value. Dividends are recognized as income in profit or loss unless the dividend clearly represents a recovery of the cost of the investment. Other net gains and losses are recognized in OCI and are never reclassified to profit or loss. (c) Impairment The Group estimates the expected credit losses (“ECL”) for the debt instruments measured at amortized cost and FVOCI based on the Group’s historical experience and informed credit assessment that includes forward-looking information. The impairment approach is decided based on the assessment of whether the credit risk of a financial asset has increased significantly since initial recognition. However, the Group applies a practical expedient and recognizes impairment losses equal to lifetime ECLs for accounts receivable – trade and lease receivables from the initial recognition. ECL is a probability-weighted estimate of credit losses. Credit losses are measured as the present value of all cash shortfalls (i.e. the difference between the cash flows due to the entity in accordance with the contract and the cash flows that the Group expects to receive). At each reporting date, the Group assesses whether financial assets measured at amortized cost and debt investments at FVOCI are credit-impaired. A financial asset is ‘credit-impaired’ when one or more events that have a detrimental impact on the estimated future cash flows of the financial asset have occurred. Loss allowance on financial assets measured at amortized cost is deducted from the carrying amount of the respective assets, while loss allowance on debt instruments at FVOCI is recognized in OCI, instead of reducing the carrying amount of the transferred assets. (d) Derecognition Financial assets The Group 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 either: • substantially all of the risks and rewards of ownership of the financial asset are transferred; or • the Group neither transfers nor retains substantially all of the risks and rewards of ownership and it does not retain control of the financial asset. The Group 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. Interest rate benchmark reform When the basis for determining the contractual cash flows of a financial asset or financial liability measured at amortized cost changed as a result of interest rate benchmark reform, the Group updated the effective interest rate of the financial asset or financial liability to reflect the change that is required by the reform. A change in the basis for determining the contractual cash flows is required by interest rate benchmark reform if the following conditions are met: • the change is necessary as a direct consequence of the reform; and • the new basis for determining the contractual cash flows is economically equivalent to the previous basis – i.e. the basis immediately before the change. When changes were made to a financial asset or financial liability in addition to changes to the basis for determining the contractual cash flows required by interest rate benchmark reform, the Group first updated the effective rate of the financial asset or financial liability to reflect the change that is required by interest rate benchmark reform. After that, the Group applied the policies on accounting for modifications to the additional changes. (e) Offsetting Financial assets and financial liabilities are offset, and the net amount is presented in the statement of financial position when the Group currently has a legally enforceable right to offset the recognized amounts and it intends either to settle on a net basis or to settle the liability and realize the asset simultaneously. A financial asset and a financial liability are offset only when the right to set off the amount is not contingent on future event and legally enforceable even on the event of default, insolvency or bankruptcy.
Revenue — Policies applicable from January 1, 2018	(23) Revenue (a) Identification of performance obligations in contracts with customers The Group identifies the distinct services or goods as performance obligations in contracts with customers such as (1) providing wireless and fixed-line telecommunications services, (2) sale of handsets and (3) providing other goods and services. In the case of providing both wireless telecommunications service and selling a handset together to one customer, the Group allocates considerations from the customer between the separate performance obligations for handset sale and wireless telecommunications service. The handset sale revenue is recognized when handset is delivered, and the wireless telecommunications service revenue is recognized over the period of the contract term as stated in the subscription contract. (b) Allocation of the transaction price to each performance obligation The Group allocates the transaction price of a contract to each performance obligation identified on a relative stand-alone selling price basis. The Group uses “adjusted market assessment approach” for estimating the stand-alone selling price of a good or service. (c) Incremental costs of obtaining a contract The Group pays commissions to its retail stores and authorized dealers in connection with acquiring service contracts. The commissions paid to these parties constituted a significant portion of the Group’s operating expenses. These commissions would not have been paid if there have been no binding contracts with subscribers and, therefore, the Group capitalizes certain costs associated with commissions paid to obtain new customer contracts and amortize them over the expected contract periods. (d) Customer loyalty programs The Group provides customer loyalty points to customers based on the usage of the service to which the Group allocates a portion of consideration received as a performance obligation distinct from wireless telecommunications services. The amount to be allocated to the loyalty program is measured according to the relative stand-alone selling price of the customer loyalty points. The amount allocated to the loyalty program is deferred as a contract liability and is recognized as revenue when loyalty points are redeemed. (e) Consideration payable to a customer Based on the subscription contract, a customer who uses the Group’s wireless telecommunications services may receive discount for purchasing goods or services from a designated third party. The Group pays a portion of the price discounts that the customer receives to the third party which is viewed as consideration payable to a customer. The Group accounts for the amounts payable to the third party as a reduction of the wireless telecommunications service revenue.

Reporting Entity (Tables)

Reporting Entity (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Total issued shares held by shareholders	The Parent Company’s common shares and depositary receipts (DRs) are listed on the Stock Market of Korea Exchange, the New York Stock Exchange and the London Stock Exchange. As of December 31, 2021 and 2020, the Parent Company’s total issued shares are held by the following shareholders: Number of shares Percentage of 2021 2020 2021 2020 SK Inc. 65,668,397 21,624,120 30.00 26.78 National Pension Service 21,076,493 8,853,906 9.63 10.97 Institutional investors and other shareholders 126,990,775 39,582,507 58.04 49.02 Kakao Co rp . 3,846,487 1,266,620 1.76 1.57 Treasury shares 1,250,992 9,418,558 0.57 11.66 218,833,144 80,745,711 100.00 100.00
List of subsidiaries	The list of subsidiaries as of December 31, 2021 and 2020 is as follows: Ownership (%)(*1) Subsidiary Location Primary business Dec. 31, 2021 Dec. 31, Subsidiaries owned by the Parent Company SK Telink Co., Ltd. Korea Telecommunication and Mobile Virtual Network Operator service 100.0 100.0 SK Communications Co., Ltd. Korea Internet website services 100.0 100.0 SK Broadband Co., Ltd. Korea Telecommunication services 74.3 74.3 PS&Marketing Corporation Korea Communications device retail business 100.0 100.0 SERVICE ACE Co., Ltd. Korea Call center management service 100.0 100.0 SERVICE TOP Co., Ltd. Korea Call center management service 100.0 100.0 SK O&S Co., Ltd. Korea Base station maintenance service 100.0 100.0 SK Telecom China Holdings Co., Ltd. China Investment (Holdings company) 100.0 100.0 SK Global Healthcare Business Group Ltd. Hong Kong Investment 100.0 100.0 YTK Investment Ltd. Cayman Islands Investment association 100.0 100.0 Atlas Investment Cayman Islands Investment association 100.0 100.0 SKT Americas, Inc. USA Information gathering and consulting 100.0 100.0 One Store Co., Ltd.(*2) Korea Telecommunication services — 52.1 Ownership (%)(*1) Subsidiary Location Primary business Dec. 31, 2021 Dec. 31, SK Planet Co., Ltd.(*2) Korea Telecommunication services, system software development and supply services — 98.7 Eleven Street Co., Ltd.(*2) Korea E-commerce — 80.3 DREAMUS COMPANY(*2) Korea Manufacturing digital audio players and other portable media devices — 51.4 SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*2) Korea Information security and unmanned security service — 62.6 Quantum Innovation Fund I Korea Investment 59.9 59.9 SK Telecom Japan Inc. Japan Information gathering and consulting 100.0 100.0 id Quantique SA(*2) Switzerland Quantum information and communications service — 68.1 SK Square Americas, Inc. (Formerly, SK Telecom TMT InvestmentCorp.)(*2) USA Investment — 100.0 FSK L&S Co., Ltd.(*2) Korea Freight and logistics consulting business — 60.0 Incross Co., Ltd.(*2) Korea Media representative business — 34.6 Happy Hanool Co., Ltd. Korea Service 100.0 100.0 SK stoa Co., Ltd. Korea Other telecommunication retail business 100.0 100.0 Broadband Nowon Co., Ltd.(*3) Korea Cable broadcasting services 100.0 55.0 T map Mobility Co., Ltd.(*2) Korea Mobility business — 100.0 Subsidiaries owned by SK Planet Co., Ltd.(*2) SK m&service Co., Ltd. Korea Database and Internet website service — 100.0 SK Planet Global Holdings Pte. Ltd. Singapore Investment (Holdings company) — 100.0 SKP America LLC. USA Digital contents sourcing service — 100.0 K-net Korea Capital investing in startups — 59.0 Subsidiaries owned by DREAMUS COMPANY(*2) iriver Enterprise Ltd. Hong Kong Management of Chinese subsidiaries — 100.0 iriver China Co., Ltd. China Sales and manufacturing of MP3 and 4 — 100.0 Dongguan iriver Electronics Co., Ltd. China Sales and manufacturing of e-book devices — 100.0 LIFE DESIGN COMPANY Inc. Japan Sales of goods in Japan — 100.0 Subsidiaries owned by SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*2) SKinfosec Information Technology(Wuxi) Co., Ltd. China System software development and supply services — 100.0 ADT CAPS Co., Ltd. Korea Unmanned security — 100.0 CAPSTEC Co., Ltd. Korea Manned security — 100.0 Subsidiaries owned by SK Broadband Co., Ltd. Home & Service Co., Ltd. Korea Operation of information and communication facility 100.0 100.0 Media S Co., Ltd.(*2) Korea Production and supply services of broadcasting programs 100.0 — Subsidiary owned by Quantum Innovation Fund I PanAsia Semiconductor Materials LLC. Korea Investment 66.4 66.4 Subsidiary owned by SK Telecom Japan Inc. SK Planet Japan, K. K. Japan Digital contents sourcing service 79.8 79.8 Subsidiary owned by id Quantique SA(*2) Id Quantique LLC Korea Quantum information and communications service — 100.0 Ownership (%)(*1) Subsidiary Location Primary business Dec. 31, 2021 Dec. 31, Subsidiaries owned by FSK L&S Co., Ltd.(*2) FSK L&S (Shanghai) Co., Ltd. China Logistics business — 66.0 FSK L&S (Hungary) Co., Ltd. Hungary Logistics business — 100.0 FSK L&S VIETNAM COMPANY LIMITED Vietnam Logistics business — 100.0 Subsidiaries owned by Incross Co., Ltd.(*2) Infra Communications Co., Ltd. Korea Service operation — 100.0 Mindknock Co., Ltd. Korea Software development — 100.0 Others(*4) SK Telecom Innovation Fund, L.P. USA Investment 100.0 100.0 SK Telecom China Fund I L.P. Cayman Islands Investment 100.0 100.0 (*1) The ownership interest represents direct ownership interest in subsidiaries either by the Parent Company or subsidiaries of the Parent Company. (*2) Details of changes in the consolidation scope for year ended December 31, 2021 are presented in note 1-(4). (*3) The Parent Company acquired 513,000 shares (45%) of Broadband Nowon Co., Ltd. at ￦ (*4) Others are owned by Atlas Investment and another subsidiary of the Parent Company.
Condensed financial information of the significant subsidiaries	1) Condensed financial information of significant subsidiaries as of and for the year ended December 31, 2021 is as follows: (In millions of won) As of December 31, 2021 2021 Subsidiary Total assets Total Total Revenue Profit SK Telink Co., Ltd. ￦ 174,837 52,821 122,016 313,404 8,846 SK Broadband Co., Ltd. 5,971,505 3,091,837 2,879,668 4,058,997 213,468 PS&Marketing Corporation 478,745 263,457 215,288 1,445,540 3,179 SERVICE ACE Co., Ltd. 99,059 66,496 32,563 197,146 2,519 SERVICE TOP Co., Ltd. 72,026 46,067 25,959 185,452 2,066 SK O&S Co., Ltd. 95,748 58,870 36,878 285,591 69 Home & Service Co., Ltd. 131,947 90,775 41,172 405,255 550 SK stoa Co., Ltd. 107,943 59,931 48,012 316,249 19,163 2) Condensed financial information of significant subsidiaries as of and for the year ended December 31, 2020 is as follows: (In millions of won) As of December 31, 2020 2020 Subsidiary Total assets Total Total Revenue Profit SK Telink Co., Ltd. ￦ 176,872 60,702 116,170 351,334 18,010 Eleven Street Co., Ltd. 999,225 542,534 456,691 545,556 (29,623 ) SK m&service Co., Ltd. 129,738 74,962 54,776 214,949 2,759 SK Broadband Co., Ltd. 5,765,808 3,119,489 2,646,319 3,713,021 150,694 K-net 377,683 65,896 311,787 — (44,737 ) PS&Marketing Corporation 470,521 257,809 212,712 1,427,218 (847 ) SERVICE ACE Co., Ltd. 96,258 71,890 24,368 206,612 2,905 SERVICE TOP Co., Ltd. 69,496 51,584 17,912 195,479 2,592 SK O&S Co., Ltd. 88,663 54,012 34,651 278,948 778 SK Planet Co., Ltd. 536,981 214,846 322,135 276,462 1,305 DREAMUS COMPANY(*1) 172,443 76,642 95,801 226,329 (23,068 ) SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*2) 2,927,396 2,550,936 376,460 1,327,150 14,227 One Store Co., Ltd. 243,442 99,943 143,499 155,218 1,952 Home & Service Co., Ltd. 124,197 88,740 35,457 397,754 (20 ) SK stoa Co., Ltd. 107,982 79,339 28,643 268,693 17,154 FSK L&S Co., Ltd.(*3) 66,117 35,192 30,925 205,623 3,022 Incross Co., Ltd.(*4) 179,308 104,778 74,530 39,440 12,307 T map Mobility Co., Ltd. 170,381 17,179 153,202 — (1,857 ) (*1) The condensed financial information of DREAMUS COMPANY is consolidated financial information including iriver Enterprise Ltd. and three other subsidiaries of DREAMUS COMPANY. (*2) The condensed financial information of SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) is consolidated financial information including SKinfosec Information Technology(Wuxi) Co., Ltd. and two other subsidiaries of SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) and including profit and loss which Life Security & Holdings Co., Ltd. recognized prior to the merger. (*3) The condensed financial information of FSK L&S Co., Ltd. is consolidated financial information including FSK L&S (Shanghai) Co., Ltd. and two other subsidiaries of FSK L&S Co., Ltd. (*4) The condensed financial information of Incross Co., Ltd. is consolidated financial information including Infra Communications Co., Ltd. and another subsidiary of Incross Co., Ltd. Condensed financial information of the significant subsidiaries as of and for the year ended December 31, 2019 is as follows: (In millions of won) As of December 31, 2019 2019 Subsidiary Total assets Total Total Revenue Profit SK Telink Co., Ltd.(*1) ￦ 265,725 77,378 188,347 363,627 3,010 Eleven Street Co., Ltd. 923,424 446,432 476,992 530,489 (5,077 ) SK m&service Co., Ltd. 109,699 58,605 51,094 218,848 2,448 SK Broadband Co., Ltd. 4,565,732 2,930,482 1,635,250 3,170,691 47,701 K-net 151,493 21,163 130,330 — (294 ) PS&Marketing Corporation 439,947 225,942 214,005 1,684,576 96 SERVICE ACE Co., Ltd. 80,844 55,133 25,711 206,080 3,906 SERVICE TOP Co., Ltd. 66,932 50,060 16,872 193,377 2,230 SK O&S Co., Ltd. 96,446 62,086 34,360 281,634 1,724 SK Planet Co., Ltd. 595,838 278,438 317,400 275,544 1,214 DREAMUS COMPANY(*2) 171,586 53,669 117,917 196,961 (48,006 ) Life & Security Holdings Co., Ltd.(*3) 2,639,781 2,330,920 308,861 913,301 12,703 SK Infosec Co., Ltd.(*4) 158,424 61,644 96,780 270,423 18,520 One Store Co., Ltd. 236,329 93,625 142,704 135,116 (5,415 ) Home & Service Co., Ltd. 121,202 84,378 36,824 351,154 (427 ) SK stoa Co., Ltd. 70,754 59,207 11,547 196,063 875 FSK L&S Co., Ltd.(*5) 47,550 19,651 27,899 130,872 306 Incross Co., Ltd.(*6) 144,263 78,519 65,744 19,787 5,756 (*1) The condensed financial information of SK Telink Co., Ltd. is consolidated financial information including SK TELINK VIETNAM Co., Ltd. (*2) The condensed financial information of DREAMUS COMPANY is consolidated financial information including iriver Enterprise Ltd. and three other subsidiaries of DREAMUS COMPANY. (*3) The condensed financial information of Life & Security Holdings Co., Ltd. is consolidated financial information including ADT CAPS Co., Ltd. and two other subsidiaries of Life & Security Holdings Co., Ltd. (*4) The condensed financial information of SK Infosec Co., Ltd. is consolidated financial information including SKinfosec Information Technology(Wuxi) Co., Ltd. (*5) The condensed financial information of FSK L&S Co., Ltd. is consolidated financial information including FSK L&S (Shanghai) Co., Ltd. and another subsidiary of FSK L&S Co., Ltd. (*6) The condensed financial information of Incross Co., Ltd. is consolidated financial information including Infra Communications Co., Ltd. and another subsidiary from the date of acquisition to December 31, 2019. (4) Changes in subsidiaries 1) The list of subsidiaries that were newly included in consolidation for the year ended December 31, 2021 is as follows: Subsidiary Reason Studio Dolphin Co., Ltd. Acquired by DREAMUS COMPANY Media S Co., Ltd. Established by SK Broadband Co., Ltd. FSK L&S (Jiangsu) Co., Ltd. Established by FSK L&S Co., Ltd. Rokmedia Co., Ltd. Acquired by One Store Co., Ltd. YLP Inc. Acquired by T map Mobility Co., Ltd. GOOD SERVICE Co., Ltd. Acquired by T map Mobility Co., Ltd. CAPS America, Inc. Established by SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) 2) The list of subsidiaries that were excluded from consolidation for the year ended December 31, 2021 is as follows: Subsidiary Reason ADT CAPS Co., Ltd. Merged into SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd., at the time of merger, SK Infosec Co., Ltd.) One Store Co., Ltd. Transferred to spin-off SK Planet Co., Ltd. Transferred to spin-off Eleven Street Co., Ltd. Transferred to spin-off DREAMUS COMPANY Transferred to spin-off SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) Transferred to spin-off id Quantique SA Transferred to spin-off SK Square Americas, Inc. (Formerly, SK Telecom TMT Investment Corp.) Transferred to spin-off FSK L&S Co., Ltd. Transferred to spin-off Incross Co., Ltd. Transferred to spin-off T map Mobility Co., Ltd. Transferred to spin-off Rokmedia Co., Ltd. Transferred to spin-off SK m&service Co., Ltd. Transferred to spin-off SK Planet Global Holdings Pte. Ltd. Transferred to spin-off SKP America LLC. Transferred to spin-off K-net Transferred to spin-off Subsidiary Reason iriver Enterprise Ltd. Transferred to spin-off iriver China Co., Ltd. Transferred to spin-off Dongguan iriver Electronics Co., Ltd. Transferred to spin-off LIFE DESIGN COMPANY Inc. Transferred to spin-off Studio Dolphin Co., Ltd. Transferred to spin-off SKinfosec Information Technology(Wuxi) Co., Ltd. Transferred to spin-off CAPSTEC Co., Ltd. Transferred to spin-off CAPS America, Inc. Transferred to spin-off Id Quantique LLC Transferred to spin-off FSK L&S (Shanghai) Co., Ltd. Transferred to spin-off FSK L&S (Hungary) Co., Ltd. Transferred to spin-off FSK L&S VIETNAM COMPANY LIMITED Transferred to spin-off FSK L&S (Jiangsu) Co., Ltd. Transferred to spin-off Infra Communications Co., Ltd. Transferred to spin-off Mindknock Co., Ltd. Transferred to spin-off YLP Inc. Transferred to spin-off GOOD SERVICE Co., Ltd. Transferred to spin-off
Information of significant non-controlling interests of the group	(5) The financial information of significant non-controlling (In millions of won) SK Broadband Ownership of non-controlling 24.9 As of Current assets ￦ 1,208,535 Non-current 4,762,970 Current liabilities (1,410,823 ) Non-current (1,681,014 ) Net assets 2,879,668 Fair value adjustment and others (23,000 ) Net assets on the consolidated financial statements 2,856,668 Carrying amount of non-controlling 725,540 2021 Revenue ￦ 4,058,997 Profit for the year 213,468 Depreciation of the fair value adjustment and others — Profit for the year on the consolidated financial statements 213,468 Total comprehensive income 224,107 Profit attributable to non-controlling 53,645 Net cash provided by operating activities ￦ 1,064,638 Net cash used in investing activities (624,191 ) Net cash used in financing activities (237,241 ) Effects of exchange rate changes on cash and cash equivalents (59 ) Net increase in cash and cash equivalents 203,147 Dividends paid to non-controlling ￦ — (In millions of won) DREAMUS One Store Co., Ltd. Eleven Street Co., Ltd. SK Shieldus ADT CAPS Incross Co., Ltd. SK Broadband Ownership of non-controlling 48.6 47.4 18.2 37.4 55.2 24.9 As of December 31, 2020 Current assets ￦ 146,278 215,672 896,828 306,520 165,668 1,179,743 Non-current 26,165 27,770 102,397 2,620,876 13,640 4,586,065 Current liabilities (72,762 ) (96,139 ) (508,427 ) (417,194 ) (101,065 ) (1,279,132 ) Non-current (3,880 ) (3,804 ) (34,107 ) (2,133,742 ) (3,713 ) (1,840,357 ) Net assets 95,801 143,499 456,691 376,460 74,530 2,646,319 Fair value adjustment and others — — (14,297 ) (1,227,442 ) — — Net assets on the consolidated financial statements 95,801 143,499 442,394 (850,982 ) 74,530 2,646,319 Carrying amount of non-controlling 47,452 68,573 81,754 (318,267 ) 46,010 665,020 2020 Revenue ￦ 226,329 155,218 545,556 1,327,150 39,440 3,713,021 Profit (loss) for the year (23,068 ) 1,952 (29,623 ) 14,227 12,307 150,694 Depreciation of the fair value adjustment and others — — (492 ) (19,229 ) — — Profit (loss) for the year on the consolidated financial statements (23,068 ) 1,952 (30,115 ) (5,002 ) 12,307 150,694 Total comprehensive income (loss) (22,740 ) 2,278 (15,793 ) (3,758 ) 12,145 151,417 Profit (loss) attributable to non-controlling (10,770 ) 930 (5,565 ) (12,432 ) 7,568 27,240 Net cash provided by operating activities ￦ 15,223 38,006 65,499 248,524 24,629 1,035,474 Net cash used in investing activities (2,471 ) (62,816 ) (71,644 ) (229,130 ) (2,284 ) (844,454 ) Net cash provided by (used in) financing activities (2,329 ) (2,499 ) (18,059 ) 11,134 (4,278 ) (93,259 ) Effects of exchange rate changes on cash and cash equivalents (2,053 ) — (385 ) (554 ) — — Net increase (decrease) in cash and cash equivalents 8,370 (27,309 ) (24,589 ) 29,974 18,067 97,761 Dividends paid to non-controlling interests for the year ended December 31, 2020 ￦ — — 5,000 17,273 — — (*) The condensed financial information of SK Shieldus Co., Ltd.(Formerly, ADT CAPS Co., Ltd.) includes profit and loss, cash flows which Life Security & Holdings Co., Ltd. recognized prior to the merger. (In millions of won) DREAMUS One Store Eleven Street Life & Security Incross Co., Ltd. Ownership of non-controlling interests (%) 48.6 47.3 18.2 45.0 65.4 As of December 31, 2019 Current assets ￦ 136,269 208,527 779,568 126,437 133,741 Non-current 35,317 27,802 143,856 2,513,344 10,522 Current liabilities (49,776 ) (88,842 ) (420,022 ) (279,403 ) (77,530 ) Non-current (3,893 ) (4,783 ) (26,410 ) (2,051,517 ) (989 ) Net assets 117,917 142,704 476,992 308,861 65,744 Fair value adjustment and others — — (18,805 ) (1,219,701 ) — Net assets on the consolidated financial statements 117,917 142,704 458,187 (910,840 ) 65,744 Carrying amount of non- controlling interests 57,175 67,742 84,673 (409,878 ) 41,074 2019 Revenue ￦ 196,961 135,116 530,489 913,301 19,787 Profit (loss) for the year (48,006 ) (5,415 ) (5,077 ) 12,703 5,756 Depreciation of the fair value adjustment and others — — (614 ) (14,913 ) — Profit (loss) for the year on the consolidated financial statements (48,006 ) (5,415 ) (5,691 ) (2,210 ) 5,756 Total comprehensive income (loss) (47,971 ) (5,856 ) (13,590 ) (5,413 ) 5,396 Profit (loss) attributable to non-controlling (23,281 ) (2,256 ) (1,064 ) (978 ) 3,630 Net cash provided by (used in) operating activities ￦ (1,387 ) 14,426 7,980 238,378 (9,331 ) Net cash provided by (used in) investing activities (2,596 ) (87,275 ) 102,366 (194,472 ) 5,053 Net cash provided by (used in) financing activities (2,965 ) 96,189 (72,686 ) (51,129 ) (4,644 ) Effects on exchange rate changes on cash and cash equivalents 197 2 35 — — Net increase (decrease) in cash and cash equivalents (6,751 ) 23,342 37,695 (7,223 ) (8,922 ) Dividend paid to non- controlling interests for ￦ — — 17,500 28,786 —

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Estimated useful lives of the Group's property and equipment	The estimated useful lives of the Group’s property and equipment are as follows: Useful lives (years) Buildings and structures 15 ~ 40 Machinery 3 ~ 15, 30 Other property and equipment 3~10 Right-of-use 1 ~ 50
Estimated useful lives of the Group's intangible assets	The estimated useful lives of the Group’s intangible assets are as follows: Useful lives (years) Frequency usage rights 2.9 ~ 10 Land usage rights 5 Industrial rights 5, 10 Development costs 5 Facility usage rights 10, 20 Customer relations 3 ~ 15 Other 3 ~ 20

Operating Segments (Tables)

Operating Segments (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Segment information	(1) Segment information for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 Continuing operations Discontinued operations Cellular services Fixed-line Others(*1) Sub-total Adjustments (*2) Total Total revenue ￦ 14,214,407 4,790,641 362,978 19,368,026 (2,619,441 ) 16,748,585 2,845,424 Inter-segment revenue 1,495,934 1,112,935 10,572 2,619,441 (2,619,441 ) — 462,341 External revenue 12,718,473 3,677,706 352,406 16,748,585 — 16,748,585 2,383,083 Depreciation and amortization 2,812,827 958,462 11,318 3,782,607 (110,052 ) 3,672,555 287,412 Operating profit (loss) 1,123,147 294,070 14,550 1,431,767 595 1,432,362 73,005 Finance income and costs, net (160,471 ) (222,406 ) Gain relating to investments in subsidiaries, associates and joint ventures, net 446,300 1,502,147 Profit before income tax 1,718,191 1,352,746 (In millions of won) 2020 Continuing operations Discontinued operations Cellular services Fixed-line telecommunication services Others(*1) Sub-total Adjustments (*2) Total Total revenue ￦ 13,853,274 4,467,863 317,065 18,638,202 (2,550,455 ) 16,087,747 3,015,563 Inter-segment revenue 1,505,311 1,035,645 9,499 2,550,455 (2,550,455 ) — 478,659 External revenue 12,347,963 3,432,218 307,566 16,087,747 — 16,087,747 2,536,904 Depreciation and amortization 2,892,460 874,562 10,675 3,777,697 (113,032 ) 3,664,665 326,417 Operating profit (loss) 1,031,887 258,973 645 1,291,505 (256,485 ) 1,035,020 69,614 Finance income and costs, net (182,258 ) (73,739 ) Gain relating to investments in subsidiaries, associates and joint ventures, net 52,456 975,947 Profit before income tax 905,218 971,822 (In millions of won) 2019 Continuing operations Cellular services Fixed-line Others(*1) Sub-total Adjustments (*2) Total Discontinued operations Total revenue ￦ 13,787,009 3,944,260 250,409 17,981,678 (2,565,247 ) 15,416,431 2,729,552 Inter-segment revenue 1,563,205 984,967 17,075 2,565,247 (2,565,247 ) — 405,267 External revenue 12,223,804 2,959,293 233,334 15,416,431 — 15,416,431 2,324,285 Depreciation and amortization 2,828,285 792,334 9,133 3,629,752 (88,768 ) 3,540,984 315,678 Operating profit (loss) 963,207 144,739 (15,095 ) 1,092,851 (105,797 ) 987,054 20,204 Finance income and costs, net (213,220 ) (82,580 ) Gain relating to investments in subsidiaries, associates 33,199 416,344 Profit before income tax 807,033 353,968 (*1) The Parent Company carried out spin-off (*2) Adjustments for operating profit (loss) are the amount differences from operating profit (loss) included in CODM report which is based on Korean IFRS to operating profit (loss) under IFRS. The reconciliation of these amounts is included in note 4-(2). The Group has restated the previously reported segment information for the years ended December 31, 2020 and 2019 to reflect reclassification of operating segments due to spin-off.
Reconciliation of total segment operating income to consolidated operating profit from continuing operations	(2) Reconciliation of total segment operating profit to consolidated operating profit from continuing operations for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Total segment operating profit (Before adjustments) ￦ 1,431,767 1,291,505 1,092,851 Adjustments(*1) (44,605 ) (42,927 ) (54,184 ) Total segment operating profit 1,387,162 1,248,578 1,038,667 Other operating income: Gain on disposal of property and equipment and intangible assets 39,136 34,625 7,755 Others(*2) 76,627 61,126 87,828 115,763 95,751 95,583 Other operating expenses: Impairment loss on property and equipment and intangible assets (3,135 ) (200,705 ) (42,823 ) Loss on disposal of property and equipment and intangible assets (28,158 ) (25,633 ) (23,821 ) Donations (12,800 ) (16,051 ) (16,782 ) Bad debt for accounts receivable — other (3,995 ) (6,640 ) (3,594 ) Others(*3) (22,475 ) (60,280 ) (60,176 ) (70,563 ) (309,309 ) (147,196 ) Consolidated operating profit from continuing operations ￦ 1,432,362 1,035,020 987,054 (*1) Adjustments for operating profit included the amount due to the consolidation adjustments, such as internal transactions. (*2) Others for the year ended December 31, 2020 includes ￦ ￦ (*3) Others for the years ended December 31, 2021, 2020 and 2019 include ￦ ￦ ￦
Summary of Disaggregation of Operating Revenue	(3) Disaggregation of operating revenues considering the economic factors that affect the amounts, timing and uncertainty of the Group’s revenue and future cash flows is as follows: (In millions of won) 2021 2020 2019 Goods and Services transferred at a point in time: Cellular revenue Goods(*1) ￦ 959,932 983,431 1,151,236 Fixed-line telecommunication revenue Goods 105,340 90,692 145,876 Other revenue Others(*2) 328,328 284,221 198,732 1,393,600 1,358,344 1,495,844 Goods and Services transferred over time: Cellular revenue Wireless service(*3) 10,100,368 9,806,719 9,538,162 Cellular interconnection 493,820 472,215 494,267 Other(*4) 1,164,353 1,085,598 1,040,139 Fixed-line telecommunication revenue Fixed-line service 217,000 230,401 225,557 Cellular interconnection 69,769 83,762 92,396 Internet Protocol Television(*5) 1,786,765 1,606,740 1,285,831 International calls 162,379 160,293 137,902 Internet service and miscellaneous(*6) 1,336,453 1,260,330 1,071,731 Other revenue Miscellaneous 24,078 23,345 34,602 15,354,985 14,729,403 13,920,587 Continuing operations 16,748,585 16,087,747 15,416,431 Discontinued operations 2,383,083 2,536,904 2,324,285 ￦ 19,131,668 18,624,651 17,740,716 (*1) Cellular revenue includes revenue from sales of handsets and other electronic accessories. (*2) Miscellaneous other revenue includes revenue from considerations received for the product sales-type data broadcasting channel use, and sales of goods through data broadcasting. (*3) Wireless service includes revenue from wireless voice and data transmission services principally derived from usage charges to wireless subscribers. (*4) Other revenue includes revenue from billing and collection services as well as other miscellaneous services. (*5) IPTV service revenue includes revenue from IPTV services principally derived from usage charges to IPTV subscribers. (*6) Internet service includes revenue from the high speed broadband internet service principally derived from usage charges to subscribers as well as other miscellaneous services.

Restricted Deposits (Tables)

Restricted Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Deposits which are restricted in use	Deposits which are restricted in use as of December 31, 2021 and 2020 are summarized as follows: (In millions of won) December 31, 2021 December 31, 2020 Short-term financial instruments(*) ￦ 79,500 98,057 Long-term financial instruments(*) 372 890 ￦ 79,872 98,947 (*) Financial instruments include charitable trust fund established by the Group where profits from the fund are donated to charitable institutions. As of December 31, 2021, the funds cannot be withdrawn before maturity.

Trade and Other Receivables (Ta

Trade and Other Receivables (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Disclosure of Detailed Information About Trade and Other Receivables Explanatory	(1) Details of trade and other receivables as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Gross amount Loss Carrying amount Current assets: Accounts receivable — trade ￦ 2,152,358 (238,847 ) 1,913,511 Short-term loans 71,750 (933 ) 70,817 Accounts receivable — other(*) 593,109 (44,747 ) 548,362 Accrued income 762 — 762 Guarantee deposits (Other current assets) 92,046 — 92,046 2,910,025 (284,527 ) 2,625,498 Non-current Long-term loans 66,431 (44,452 ) 21,979 Long-term accounts receivable — other(*) 277,116 (1,878 ) 275,238 Guarantee deposits 186,713 — 186,713 Long-term accounts receivable — trade (Other non-current 8,140 (34 ) 8,106 538,400 (46,364 ) 492,036 ￦ 3,448,425 (330,891 ) 3,117,534 (*) Gross and carrying amounts of accounts receivable – other as of December 31, 2021 include ￦ (In millions of won) December 31, 2020 Gross amount Loss Carrying amount Current assets: Accounts receivable — trade ￦ 2,453,149 (264,256 ) 2,188,893 Short-term loans 98,366 (902 ) 97,464 Accounts receivable — other(*) 1,034,119 (55,075 ) 979,044 Accrued income 3,418 (166 ) 3,252 Guarantee deposits (Other current assets) 112,733 — 112,733 3,701,785 (320,399 ) 3,381,386 Non-current Long-term loans 84,355 (44,122 ) 40,233 Long-term accounts receivable — other(*) 332,803 — 332,803 Guarantee deposits 172,774 (300 ) 172,474 Long-term accounts receivable — trade (Other non-current 25,702 (242 ) 25,460 615,634 (44,664 ) 570,970 ￦ 4,317,419 (365,063 ) 3,952,356 (*) Gross and carrying amounts of accounts receivable — other as of December 31, 2020 include ￦
Changes in Loss Allowance on Accounts Receivable - Trade Measured at Amortized Costs	(2) Changes in the loss allowance on accounts receivable — trade measured at amortized costs for (In millions of won) Beginning Impairment(*1) Write-offs(*2) Collection of written-off Business Spin-off Ending balance 2021 ￦ 264,498 31,546 (65,852 ) 14,565 878 (6,754 ) 238,881 2020 ￦ 249,501 48,625 (48,278 ) 12,771 1,879 — 264,498 (*1) Includes amounts related to discontinued operations. (*2) The Group writes off the trade and other receivables that are determined to be uncollectable due to reasons such as termination of operations or bankruptcy.
Summary of Loss Allowance on Accounts Receivable - Trade	(3) The Group applies the practical expedient that allows the Group to estimate the loss allowance for accounts receivable — trade at an amount equal to the lifetime expected credit losses. The expected credit losses include the forward-looking information. To make the assessment, the Group uses its historical credit loss experience over the past three years and classifies the accounts receivable — trade by their credit risk characteristics and days overdue. Details of loss allowance on accounts receivable — trade as of December 31, 2021 are as follows: (In millions of won) Less than 6 months ~ 1 year 1 ~ 3 years More than Telecommunications service revenue Expected credit loss rate 2.06 % 76.34 % 86.51 % 99.92 % Gross amount ￦ 1,364,899 46,399 132,810 26,540 Loss allowance 28,102 35,422 114,891 26,519 Other revenue Expected credit loss rate 2.44 % 43.30 % 70.77 % 89.19 % Gross amount ￦ 565,378 1,150 6,192 17,130 Loss allowance 13,789 498 4,382 15,278

Prepaid expenses (Tables)

Prepaid expenses (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of Prepaid Expenses	(1) Details of prepaid expenses as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Current assets: Incremental costs of obtaining contracts ￦ 1,886,680 2,016,570 Others 100,823 111,779 ￦ 1,987,503 2,128,349 Non-current Incremental costs of obtaining contracts ￦ 977,236 982,952 Others 91,912 80,759 ￦ 1,069,148 1,063,711
Summary of Incremental Costs of Obtaining Contracts That Capitalized as Assets and Related Amortization Recognized as Commissions	(2) Incremental costs of obtaining contracts The amortization and impairment losses in connection with incremental costs of obtaining contracts recognized for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Amortization and impairment losses recognized(*) ￦ 2,634,134 2,418,947 2,193,333 (*) Includes amounts related to discontinued operations.

Contract Assets and Liabiliti_2

Contract Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Schedule of Contract Assets and Liabilities	(1) Details of contract assets and liabilities as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Contract assets: Allocation of consideration between performance obligations ￦ 118,278 148,281 Contract liabilities: Wireless service contracts 18,397 22,026 Customer loyalty programs 12,699 16,709 Fixed-line service contracts 118,525 106,916 Security services — 30,597 Others 53,346 84,348 ￦ 202,967 260,596
Schedule of Performance Obligations	(2) The amount of revenue recognized for the years ended December 31, 2021 and 2020 related to the contract liabilities carried forward from the prior periods are ￦ ￦ (In millions of won) Less than 1 year 1 ~ 2 years More than 2 years Total Wireless service contracts ￦ 18,397 — — 18,397 Customer loyalty programs 10,650 1,399 650 12,699 Fixed-line service contracts 91,143 11,981 15,401 118,525 Others 46,246 2,828 4,272 53,346 ￦ 166,436 16,208 20,323 202,967

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Details of inventories	(1) Details of inventories as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Acquisition Write- Carrying Acquisition Write- Carrying Merchandise ￦ 204,545 (3,419 ) 201,126 172,762 (10,566 ) 162,196 Finished goods — — — 3,730 (1,879 ) 1,851 Work in process — — — 2,579 (818 ) 1,761 Raw materials — — — 11,921 (6,905 ) 5,016 Supplies 3,511 — 3,511 619 — 619 ￦ 208,056 (3,419 ) 204,637 191,611 (20,168 ) 171,443
Amount of the inventory write-downs charged to the consolidated statement of income and write-off of inventories	(2) The amount of the inventory write-downs and write-off (In millions of won) 2021 2020 2019 Charged to cost of products that have been resold(*) ￦ (3,287 ) (1,560 ) 15,019 Write-off (347 ) (3,312 ) (1,101 ) (*) Includes amounts related to discontinued operations.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Less than 1 year [member]
Statement [LineItems]
Details of investment securities	(1) Details of short-term investment securities as of December 31, 2021 and 2020 are as follows: (In millions of won) Category December 31, 2021 December 31, 2020 Beneficiary certificates FVTPL ￦ 5,010 150,392
Later than one year [Member]
Statement [LineItems]
Details of investment securities	(2) Details of long-term investment securities as of December 31, 2021 and 2020 are as follows: (In millions of won) Category December 31, 2021 December 31, 2020 Equity instruments FVOCI(*) ￦ 1,510,428 1,454,361 FVTPL 57,830 67,833 1,568,258 1,522,194 Debt instruments FVOCI 1,177 1,080 FVTPL 145,643 125,563 146,820 126,643 ￦ 1,715,078 1,648,837 (*) The Group designated investment s ￦ ￦ ￦ spin-off,

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Summary of Acquiree	(i) Summary of the acquiree Information of Acquiree Corporate name Broadband Nowon Co., Ltd. Location 21, 81gil, Dobong-ro, Gangbuk-gu, CEO Yoo, Chang-Wan Industry Cable broadcasting services
Incross Co Ltd [Member]
Statement [LineItems]
Summary of Acquiree	(i) Summary of the acquiree Information of Acquiree Corporate name Incross Co., Ltd. Location 5 th Nambusunhwan-ro, Gwanak-gu, CEO Lee, Jae-won Industry Media representative business
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	(ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amount I. Considerations transferred: Cash and cash equivalents ￦ 53,722 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 17,400 Short-term financial instruments 24,941 Accounts receivable — trade and other 67,259 Property and equipment, net 2,411 Intangible assets, net 2,709 Other assets 9,254 Accounts payable — trade and other (57,309 ) Other liabilities (1,984 ) 64,681 III. Non-controlling 40,592 IV. Goodwill(I - II+III) ￦ 29,633
Studio Dolphin Co Ltd [Member]
Statement [LineItems]
Summary of Acquiree	(i) Summary of the acquiree Information of Acquiree Corporate name Studio Dolphin Co., Ltd. Location 3 rd Jandari-ro 7an-gil, Mapo-gu, CEO Kim, Dong-Hee Industry Music and sound recording business
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	(ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 1,500 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 20 Accounts receivable — trade and other 31 Other assets 7 Accounts payable — trade and other (4 ) Short-term borrowings (2 ) Other liabilities (17 ) 35 III. Goodwill(I - II) ￦ 1,465
Ylp Inc [Member]
Statement [LineItems]
Summary of Acquiree	Information of Acquiree Corporate name YLP Inc. Location 1740, Cheongwon-ro, Pyeongtaek-si, Gyeonggi-do, CEO Lee, Hyeok-Ju Industry Freight forwarders and cargo agents
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	(ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 55,598 Fair value of shares of T map Mobility Co., Ltd. 23,402 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 1,897 Financial instruments 4,000 Accounts receivable — trade and other, net 4,480 Property and equipment, net 431 Intangible assets, net 3,595 Other assets 325 Borrowings (1,000 ) Accounts payable — trade and other (3,542 ) Lease liabilities (327 ) Other liabilities (48 ) Deferred tax liabilities (327 ) 9,484 III. Goodwill(I - II) ￦ 69,516
Rockmedia Co Ltd [Member]
Statement [LineItems]
Summary of Acquiree	(i) Summary of the acquiree Information of Acquiree Corporate name Rokmedia Co., Ltd. Location 3 rd Seongam-ro, Mapo-gu, CEO Kang, Jun-Gyu Jeong-Su Industry Publishing and telecommunications retail business
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	(ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 40,000 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 719 Financial instruments 2,170 Accounts receivable — trade and other, net 1,374 Inventories 933 Other assets 3,212 Short-term loans, net 30 Property and equipment, net 792 Intangible assets, net 2,677 Accounts payable — trade and other (1,885 ) Contract liabilities (1,401 ) Borrowings (1,485 ) Provisions (385 ) Lease liabilities (56 ) Other liabilities (111 ) Deferred tax liabilities (135 ) Income tax payable (90 ) 6,359 III. Goodwill(I - II) ￦ 33,641
Good Service Co Ltd [Member]
Statement [LineItems]
Summary of Acquiree	(i) Summary of the acquiree Information of Acquiree Corporate name GOOD SERVICE Co., Ltd. Location 4 th Daeheung-ro, Mapo-gu, CEO Kim, Seung-Wook Industry Surrogate driving service business and related business
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	(ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 10,000 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 1,328 Financial instruments 116 Accounts receivable — trade and other, net 1,881 Property and equipment, net 116 Intangible assets, net 3,492 Accounts payable — trade and other (883 ) Other liabilities (85 ) Deferred tax liabilities (696 ) Lease liabilities (113 ) 5,156 III. Goodwill(I - II) ￦ 4,844
SK Broadband Co., Ltd. [member]
Statement [LineItems]
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Fair value of shares of SK Broadband Co., Ltd. ￦ 862,147 Fair value of derivative liability(*1) 320,984 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 110,644 Short-term financial instruments 6 Accounts receivable — trade and other 66,241 Prepaid expenses 36,324 Contract assets 14,033 Long-term investment securities 6,239 Investments in associates and joint ventures 13,637 Property and equipment, net 245,654 Intangible assets, net(*2) 423,515 Other assets 3,261 Deferred tax assets 1,296 Accounts payable — trade and other (105,179 ) Contract liabilities (1,674 ) Income tax payable (18,065 ) Provisions (2,755 ) Defined benefit liabilities (30 ) Other liabilities (15,655 ) 777,492 III. Goodwill(I - II) ￦ 405,639 (*1) The Parent Company has recognized fair value of obligations and rights in connection with the shareholders’ agreement with the acquiree’s shareholders as consideration for the business combination. (See note 22) (*2) Identifiable intangible assets recognized by the Group in the business combination included customer relationships measured at fair value on the acquisition date of ￦374,019 million. Fair value of the customer relationship was estimated based on the multi-period excess earnings method (“MPEEM”). MPEEM is a valuation technique under income approach which estimates fair value by discounting the expected future excess earnings attributable to an intangible asset using risk adjusted discount rate. The following table shows the details of valuation technique used in measuring fair values as well as the significant unobservable inputs used.
Broadband Nowon Co., Ltd. [member]
Statement [LineItems]
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	(ii) Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 10,421 II. Fair value of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 18,106 Accounts receivable — trade and other 1,122 Property and equipment, net 1,784 Intangible assets, net 360 Other assets 595 Accounts payable — trade and other (1,351 ) Other liabilities (336 ) 20,280 III. Non-controlling 9,126 IV. Gain on bargain purchase(I - II+III) ￦ (733 )
ADT CAPS Co., Ltd. [member]
Statement [LineItems]
Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date	Considerations transferred, identifiable assets acquired and liabilities assumed at the acquisition date are as follows: (In millions of won) Amounts I. Consideration transferred: Cash and cash equivalents ￦ 8,047 II. Fair value of identifiable assets acquired and liabilities assumed: Accounts receivable — trade and other 6,787 Property and equipment, net 363 Intangible assets, net 6,460 Other assets 4 Accounts payable — trade and other (5,306 ) Defined benefit liabilities (1,227 ) Deferred tax liabilities (1,554 ) Other liabilities (372 ) 5,155 III. Goodwill (I - II) ￦ 2,892

Investments in Associates and_2

Investments in Associates and Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Investments in associates and joint ventures accounted for using the equity method	(1) Investments in associates and joint ventures accounted for using the equity method as of December 31, 2021 and 2020 are as follows: December 31, 2021 December 31, 2020 (In millions of won) Country Ownership (%) Carrying Ownership Carrying Investments in associates: SK China Company Ltd. China 27.3 ￦ 793,754 27.3 ￦ 555,133 Korea IT Fund(*1) Korea 63.3 339,976 63.3 323,294 KEB HanaCard Co., Ltd.(*2) Korea 15.0 349,866 15.0 314,930 SK Telecom CS T1 Co., Ltd.(*3) Korea — — 54.9 53,010 NanoEnTek, Inc.(*3) Korea — — 28.4 43,190 UniSK China 49.0 19,156 49.0 15,700 SK Technology Innovation Company Cayman Islands 49.0 86,301 49.0 41,579 SK MENA Investment B.V. Netherlands 32.1 15,343 32.1 14,043 SK hynix Inc.(*3) Korea — — 20.1 12,251,861 SK Latin America Investment S.A. Spain 32.1 14,004 32.1 13,930 Grab Geo Holdings PTE. LTD.(*3) Singapore — — 30.0 30,063 SK South East Asia Investment Pte. Ltd. Singapore 20.0 348,782 20.0 311,990 Pacific Telecom Inc.(*2) USA 15.0 43,789 15.0 39,723 S.M. Culture & Contents Co., Ltd.(*4) Korea 23.1 60,261 23.3 62,248 Content Wavve Co., Ltd.(*3) Korea — — 30.0 75,803 Hello Nature Co., Ltd.(*3) Korea — — 49.9 11,969 Digital Games International Pte. Ltd. Singapore 33.3 2,208 33.3 6,449 Invites Healthcare Co., Ltd.(*5) Korea 27.1 26,474 43.5 25,536 Nam Incheon Broadcasting Co., Ltd. Korea 27.3 12,525 27.3 10,902 NANO-X Israel — — 5.6 28,484 Home Choice Corp.(*2) Korea 17.8 3,052 17.8 3,585 Carrot General Insurance Co., Ltd.(*6) Korea — — 21.4 13,469 12CM JAPAN and others(*2,3,7) — — 72,605 — 65,750 2,188,096 14,312,641 Investments in joint ventures: Dogus Planet, Inc.(*3) Turkey — — 50.0 15,071 Finnq Co., Ltd.(*8) Korea 49.0 7,255 49.0 13,342 NEXTGEN BROADCAST SERVICES CO, LLC(*3) USA — — 50.0 5,850 NEXTGEN ORCHESTRATION, LLC(*3) USA — — 50.0 1,600 Techmaker GmbH(*3) Germany — — 50.0 5,609 UTC Kakao-SK Korea 48.2 2,000 — — 9,255 41,472 ￦ 2,197,351 ￦ 14,354,113 (*1) Investment in Korea IT Fund was classified as investment in associates as the Group does not have control over the investee under the contractual agreement with other shareholders. (*2) These investments were classified as investments in associates as the Group can exercise significant influence through its right to appoint the members of the Board of Directors even though the Group has less than 20% of equity interests. (*3) Investments in SK Telecom CS T1 Co., Ltd. and twenty- three spin-off (*4) The ownership interest has changed from 23.3% to 23.1% as third-party share option of S.M. Culture & Contents Co., Ltd. was exercised for the year ended December 31, 2021. (*5) The Group disposed the entire shares of SK Telecom Smart City Management Co., Ltd. to Invites Healthcare Co., Ltd. for the year ended December 31, 2020 and additionally contributed ￦ (*6) The Parent Company has entered into an agreement whereby the entire shares of Carrot General Insurance Co., Ltd. will transfer to T map Mobility Co., Ltd. In accordance with the agreement, the Parent Company reclassified the entire shares of Carrot General Insurance Co., Ltd. as non-current (*7) The Group disposed the entire shares of SK Wyverns Co., Ltd. and recognized ￦ ￦ of impairment loss for the investments in TreePay Co. Ltd., for the year ended December 31, 2021. (*8) These investments were classified as investments in joint ventures as the Group has a joint control pursuant to the agreement with the other shareholders. (*9) The Group newly invested ￦
Market price of investments in listed associates	(2) The market value of investments in listed associates as of December 31, 2021 and 2020 are as follows: (In millions of won, except for share data) December 31, 2021 December 31, 2020 Market price Number of Market value Market price per share (in won) Number of Market value NanoEnTek, Inc.(*) ￦ — — — 8,620 7,600,649 65,518 SK hynix Inc.(*) — — — 118,500 146,100,000 17,312,850 S.M. 4,485 22,033,898 98,822 1,630 22,033,898 35,915 NANO-X — — — 49,678 (USD 45.66 ) 2,607,466 129,534 (*) Investments in NanoEnTek, Inc., SK hynix Inc. and NANO-X spin-off
Financial information of significant associates	(3) The condensed financial information of significant associates as of and for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) KEB HanaCard Co., Ltd. (*) Korea IT Fund SK China Company SK South East Asia As of December 31, 2021 Current assets ￦ 9,130,044 117,172 1,124,219 133,110 Non-current 465,333 419,632 1,849,102 2,853,184 Current liabilities 1,281,783 — 53,199 412,962 Non-current 6,284,587 — 316,470 — 2021 Revenue ￦ 1,270,568 58,741 80,241 9,945 Profit (loss) for the year 250,484 50,107 933,475 (188,678 ) Other comprehensive income (loss) 909 (6,847 ) 326,661 304,700 Total comprehensive income 251,393 43,260 1,260,136 116,022 (In millions of won) SK hynix KEB HanaCard Co., Ltd. (*) Korea IT Fund SK China Company SK South East Asia As of December 31, 2020 Current assets ￦ 16,570,953 7,910,517 107,652 380,413 797,045 Non-current 54,602,900 298,438 402,812 1,706,634 1,672,412 Current liabilities 9,072,360 897,594 — 51,025 67 Non-current 10,192,396 5,531,968 — 308,606 — 2020 Revenue ￦ 31,900,418 1,231,815 52,330 107,791 — Profit (loss) for the year 4,758,914 154,521 36,615 20,369 (158,680 ) Other comprehensive income (loss) (107,378 ) (4,283 ) 9,647 42,921 (390,851 ) Total comprehensive income (loss) 4,651,536 150,238 46,262 63,290 (549,531 ) (In millions of won) SK hynix KEB HanaCard Co., Ltd. (*) Korea IT Fund SK China Company SK South East Asia As of December 31, 2019 Current assets ￦ 14,457,602 7,974,407 113,233 615,028 81,065 Non-current 50,331,892 207,284 378,691 1,442,748 1,797,239 Current liabilities 7,874,033 1,015,657 — 59,395 94 Non-current 8,972,266 5,537,850 — 215,354 — 2019 Revenue ￦ 26,990,733 1,236,678 70,565 116,269 — Profit for the year 2,016,391 56,281 53,867 23,474 1,190 Other comprehensive income (loss) 94,023 (4,458 ) 6,132 (15,093 ) 97,508 Total comprehensive income 2,110,414 51,823 59,999 8,381 98,698 (*) The financial information of SK hynix Inc., KEB HanaCard Co., Ltd., SK China Company Ltd. and SK South East Asia Investment Pte. Ltd. are consolidated financial information. In addition, the financial information of SK hynix Inc. as of and for the year ended 2019 is financial information before the change in accounting policy in connection with the application of interpretations published by International Financial Reporting Interpretations Committee on determining lease term, as the impact on the Group’s consolidated financial statements is immaterial.
Condensed financial information of joint ventures	(4) There are no significant joint ventures as of December 31, 2021, the condensed financial information of significant joint ventures as of and for the years ended December 31, 2020 and 2019 are as follows: (In millions of won) Dogus Planet, Inc. Finnq Co., Ltd. As of December 31, 2020 Current assets ￦ 55,951 26,781 Cash and cash equivalents 9,083 23,936 Non-current 30,408 8,530 Current liabilities 46,186 7,367 Accounts payable, other payables and provisions 28,145 5,094 Non-current 10,031 879 2020 Revenue ￦ 177,084 3,937 Depreciation and amortization (4,642 ) (4,417 ) Interest income 1,878 29 Interest expense (555 ) (51 ) Profit (loss) for the year 7,030 (19,426 ) Total comprehensive loss (1,659 ) (19,426 ) (In millions of won) Dogus Planet, Inc. Finnq Co., Ltd. As of December 31, 2019 Current assets ￦ 59,632 42,995 Cash and cash equivalents 13,422 40,619 Non-current 25,247 11,389 Current liabilities 52,238 6,756 Accounts payable, other payables and provisions 35,459 5,062 Non-current 800 1,099 2019 Revenue ￦ 136,777 1,968 Depreciation and amortization (5,487 ) (4,769 ) Interest income 1,455 12 Interest expense (92 ) (198 ) Profit (loss) for the year 9,294 (17,079 ) Total comprehensive income (loss) 9,294 (17,361 )
Reconciliations of financial information of significant associates to carrying amounts of investments in associates in the consolidated financial statements	(5) Reconciliations of financial information of significant associates to carrying amounts of investments in associates in the consolidated financial statements as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Net assets Ownership Net assets Cost-book Carrying KEB HanaCard Co., Ltd. ￦ 2,029,007 15.0 304,351 45,515 349,866 Korea IT Fund 536,804 63.3 339,976 — 339,976 SK China Company Ltd.(*1) 2,603,336 27.3 709,961 83,793 793,754 SK South East Asia Investment Pte. Ltd.(*1) 1,743,908 20.0 348,782 — 348,782 (In millions of won) December 31, 2020 Net assets Ownership Net assets Cost-book Carrying SK hynix Inc.(*1,2) ￦ 51,883,236 20.1 11,082,048 1,169,813 12,251,861 KEB HanaCard Co., Ltd. 1,779,393 15.0 266,909 48,021 314,930 Korea IT Fund 510,464 63.3 323,294 — 323,294 SK China Company Ltd.(*1) 1,725,949 27.3 470,687 84,446 555,133 SK South East Asia Investment Pte. Ltd.(*1) 1,559,951 20.0 311,990 — 311,990 (*1) Net assets of these entities represent net assets excluding those attributable to their non-controlling (*2) The ownership interest is based on the number of shares owned by the Parent Company divided by the total shares issued by the investee company. The Group applied the equity method using the effective ownership interest which is based on the number of shares owned by the Parent Company and the investee’s total shares outstanding. The effective ownership interest applied for the equity method is 21.36%.
Details of the changes in investments in associates and joint ventures accounted for using the equity method	(6) Details of the changes in investments in associates and joint ventures accounted for using the equity method for the years ended December 31, 2021 and 2020 are as follows: 2021 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Spin-off Ending Investments in associates: SK China Company Ltd.(*1) ￦ 555,133 — 274,066 95,696 (131,141 ) — 793,754 Korea IT Fund(*1) 323,294 — 31,734 (4,336 ) (10,716 ) — 339,976 KEB HanaCard Co., Ltd. 314,930 — 35,057 (121 ) — — 349,866 SK Telecom CS T1 Co., Ltd.(*2) 53,010 4,888 (8,769 ) (575 ) — (48,554 ) — NanoEnTek, Inc.(*2) 43,190 — 1,836 (86 ) — (44,940 ) — UniSK 15,700 — 1,475 1,981 — — 19,156 SK Technology Innovation Company 41,579 — 39,256 5,466 — — 86,301 SK MENA Investment B.V. 14,043 — 2 1,298 — — 15,343 SK hynix Inc.(*1,2) 12,251,861 19,482 1,542,757 197,473 (170,937 ) (13,840,636 ) — SK Latin America Investment S.A. 13,930 — (49 ) 123 — — 14,004 Grab Geo Holdings PTE. LTD.(*2) 30,063 — — — — (30,063 ) — SK South East Asia Investment Pte. Ltd. 311,990 — (18,218 ) 55,010 — — 348,782 Pacific Telecom Inc. 39,723 — 1,598 2,468 — — 43,789 S.M. Culture & Contents Co., Ltd. 62,248 144 (2,484 ) 353 — — 60,261 Contents Wavve Co., Ltd.(*2) 75,803 100,000 (20,716 ) — — (155,087 ) — Hello Nature Co., Ltd.(*2,3) 11,969 9,980 (10,899 ) (1 ) (1,730 ) (9,319 ) — Digital Games International Pte. Ltd. 6,449 — (4,529 ) 288 — — 2,208 Invites Healthcare Co., Ltd. 25,536 7,000 (5,968 ) (94 ) — — 26,474 Nam Incheon Broadcasting Co., Ltd.(*1) 10,902 — 1,759 — (136 ) — 12,525 NANO-X 28,484 (47 ) (2,049 ) — 2,437 (28,825 ) — Home Choice Corp. 3,585 — (533 ) — — — 3,052 Carrot General Insurance Co., Ltd.(*4) 13,469 12,289 (6,666 ) (358 ) (8,734 ) (10,000 ) — Bertis Inc.(*2) — 15,739 (423 ) — — (15,316 ) — UT LLC(*2) — 86,319 (7,773 ) — — (78,546 ) — SPARKPLUS Co., Ltd.(*2) — 34,166 — — — (34,166 ) — 12CM JAPAN and others(*2,5) 65,750 9,038 (2,869 ) 7,693 (1,624 ) (5,383 ) 72,605 14,312,641 298,998 1,837,595 362,278 (322,581 ) (14,300,835 ) 2,188,096 2021 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Spin-off Ending Investments in joint ventures: Dogus Planet, Inc.(*2) ￦ 15,071 — (6,990 ) (1,447 ) — (6,634 ) — Finnq Co., Ltd. 13,342 — (5,969 ) (118 ) — — 7,255 NEXTGEN BROADCAST SERVICES CO, LLC(*2) 5,850 9,048 (1,276 ) — 892 (14,514 ) — NEXTGEN ORCHESTRATION, LLC(*2) 1,600 — — — 142 (1,742 ) — Techmaker GmbH(*2) 5,609 — (94 ) 145 — (5,660 ) — WAVVE Americas Inc. (Formerly, Korea Content Platform, Inc.)(*2) — 30,191 (14 ) — 598 (30,775 ) — UTC Kakao-SK — 2,000 — — — — 2,000 41,472 41,239 (14,343 ) (1,420 ) 1,632 (59,325 ) 9,255 ￦ 14,354,113 340,237 1,823,252 360,858 (320,949 ) (14,360,160 ) 2,197,351 (*1) Dividends received from the associates are deducted from the carrying amount for the year ended December 31, 2021. (*2) Investment in SK Telecom CS T1 Co., Ltd. and twenty- three spin-off spin-off (*3) The Group recognized ￦ (*4) The Parent Company has entered into an agreement whereby the entire shares of Carrot General Insurance Co., Ltd. will transfer to T map Mobility Co., Ltd. In accordance with the agreement, the Parent Company reclassified the investments in Carrot General Insurance Co., Ltd. amounting to ￦ ￦ (*5) The acquisition for the year ended December 31, 2021 includes ￦ ￦ ￦ ￦ ￦ ￦ 2020 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Business Ending Investments in associates: SK China Company Ltd. ￦ 568,459 — 3,752 (17,078 ) — — 555,133 Korea IT Fund(*1) 311,552 — 23,189 6,110 (17,557 ) — 323,294 KEB HanaCard Co., Ltd. 294,756 — 20,671 (497 ) — — 314,930 SK Telecom CS T1 Co., Ltd.(*2) 60,305 — (7,282 ) (13 ) — — 53,010 NanoEnTek, Inc.(*2) 42,127 143 830 90 — — 43,190 UniSK(*1) 14,342 — 1,403 168 (213 ) — 15,700 SK Technology Innovation Company 43,997 — 184 (2,602 ) — — 41,579 SK MENA Investment B.V. 14,904 — — (861 ) — — 14,043 SK hynix Inc.(*1,2) 11,425,325 — 995,117 (22,481 ) (146,100 ) — 12,251,861 SK Latin America Investment S.A. 13,698 — (40 ) 272 — — 13,930 Grab Geo Holdings PTE. LTD.(*2) 31,269 — (425 ) (781 ) — — 30,063 SK South East Asia Investment Pte. Ltd. 250,034 119,770 11,250 (69,064 ) — — 311,990 Pacific Telecom Inc.(*1) 40,016 — 2,307 (1,621 ) (979 ) — 39,723 S.M. Culture & Contents Co., Ltd. 63,469 (162 ) (813 ) (246 ) — — 62,248 Contents Wavve Co., Ltd.(*2) 83,640 — (7,837 ) — — — 75,803 Hello Nature Co., Ltd.(*2,3) 13,620 9,980 (11,118 ) (79 ) (434 ) — 11,969 Digital Games International Pte. Ltd. — 8,810 (2,038 ) (323 ) — — 6,449 Invites Healthcare Co., Ltd. — 28,000 (2,645 ) 181 — — 25,536 Nam Incheon Broadcasting Co., Ltd. — — 676 — — 10,226 10,902 NANO-X — 28,515 (747 ) — 716 — 28,484 Home Choice Corp. — — 174 — — 3,411 3,585 Carrot General Insurance Co., Ltd. (*5) 6,459 31 (6,188 ) (33 ) 13,200 — 13,469 12CM JAPAN and others(*2,6) 58,884 (1,508 ) (2,134 ) (2,302 ) 12,810 — 65,750 13,336,856 193,579 1,018,286 (111,160 ) (138,557 ) 13,637 14,312,641 2020 (In millions of won) Beginning Acquisition Share of (losses) Other compre- income Other Business Ending Investments in joint ventures: Dogus Planet, Inc.(*2) ￦ 15,921 — 3,453 (4,303 ) — — 15,071 Finnq Co., Ltd. 22,880 — (9,538 ) — — — 13,342 NEXTGEN BROADCAST SERVICES CO, LLC(*2) 7,961 — (1,769 ) — (342 ) — 5,850 NEXTGEN ORCHESTRATION, LLC(*2) 1,646 — 57 — (103 ) — 1,600 Techmaker GmbH(*2) — 5,609 — — — — 5,609 48,408 5,609 (7,797 ) (4,303 ) (445 ) — 41,472 ￦ 13,385,264 199,188 1,010,489 (115,463 ) (139,002 ) 13,637 14,354,113 (*1) Dividends received from the associates are deducted from the carrying amount for the year ended December 31, 2020. (*2) Profit and loss related to investments in associates and joint ventures, which are transferred to the spin-off (*3) The Group recognized ￦ (*4) As the Group obtained significant influence, ￦ (*5) ￦ million of preferred shares of Carrot General Insurance Co., Ltd. were converted to common shares for the year ended December 31, 2020. (*6) The acquisitions for the year ended December 31, 2020 include ￦ ￦ ￦ ￦ ￦ KIF-Stonebridge ￦
Details of cumulative unrecognized equity method losses	(7) The Group discontinued the application of equity method to the following investees due to their carrying amounts being reduced to zero. The details of cumulative unrecognized equity method losses as of December 31, 2021 are as follows: (In millions of won) Unrecognized loss Unrecognized change in equity 2021 Cumulative loss 2021 Cumulative loss Wave City Development Co., Ltd. ￦ 6,143 8,543 — — Daehan Kanggun BcN Co., Ltd. and others (5,167 ) 5,780 — (124 ) ￦ 976 14,323 — (124 )

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of property and equipment	(1) Property and equipment as of December 31, 2021 and 2020 are as follows: December 31, 2021 (In millions of won) Acquisition cost Accumulated Accumulated Carrying Land ￦ 972,800 — — 972,800 Buildings 1,692,239 (897,336 ) (450 ) 794,453 Structures 922,637 (629,757 ) (1,601 ) 291,279 Machinery 35,770,485 (27,771,040 ) (1,518 ) 7,997,927 Other 1,718,337 (1,230,128 ) (493 ) 487,716 Right-of-use 2,229,945 (669,389 ) (1,223 ) 1,559,333 Construction in progress 767,751 — — 767,751 ￦ 44,074,194 (31,197,650 ) (5,285 ) 12,871,259 December 31, 2020 (In millions of won) Acquisition cost Accumulated Accumulated Carrying Land ￦ 1,039,323 — — 1,039,323 Buildings 1,747,445 (888,389 ) (450 ) 858,606 Structures 913,102 (594,098 ) (1,601 ) 317,403 Machinery 36,152,031 (27,761,449 ) (14,370 ) 8,376,212 Other 2,047,405 (1,391,201 ) (2,588 ) 653,616 Right-of-use 1,961,346 (489,311 ) — 1,472,035 Construction in progress 659,882 — — 659,882 ￦ 44,520,534 (31,124,448 ) (19,009 ) 13,377,077
Changes in property and equipment	(2) Changes in property and equipment for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 Beginning Acquisition Disposal Transfer Deprecia- Impairment(*2) Business Spin-off Ending Land ￦ 1,039,323 634 (21,557 ) 24,789 — — — (70,389 ) 972,800 Buildings 858,606 3,919 (9,706 ) 47,612 (55,818 ) — 639 (50,799 ) 794,453 Structures 317,403 2,482 (6,124 ) 16,546 (37,968 ) — — (1,060 ) 291,279 Machinery 8,376,212 593,225 (44,477 ) 1,816,003 (2,394,351 ) (1,054 ) — (347,631 ) 7,997,927 Other 653,616 830,277 (2,286 ) (607,271 ) (180,980 ) (495 ) 193 (205,338 ) 487,716 Right-of-use 1,472,035 672,723 (60,159 ) (9,610 ) (433,970 ) (1,223 ) 507 (80,970 ) 1,559,333 Construction in progress 659,882 1,695,316 (1,071 ) (1,554,047 ) — — — (32,329 ) 767,751 ￦ 13,377,077 3,798,576 (145,380 ) (265,978 ) (3,103,087 ) (2,772 ) 1,339 (788,516 ) 12,871,259 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized impairment losses for obsolete assets for the year ended December 31, 2021. (*3) Includes assets from the acquisition of YLP Inc. and another company by T map Mobility Co., Ltd. and from the acquisition of Rokmedia Co., Ltd. by One Store Co., Ltd. (In millions of won) 2020 Beginning Acquisition Disposal Transfer Deprecia- Impairment(*2) Business Ending Land ￦ 981,389 525 (20,415 ) 37,532 — — 40,292 1,039,323 Buildings 867,408 3,034 (21,811 ) 48,160 (55,215 ) — 17,030 858,606 Structures 347,069 2,542 (4,417 ) 9,167 (36,995 ) — 37 317,403 Machinery 7,924,392 553,052 (32,369 ) 2,180,445 (2,419,522 ) (1,745 ) 171,959 8,376,212 Other 731,066 945,499 (6,486 ) (817,819 ) (203,376 ) — 4,732 653,616 Right-of-use 1,326,628 736,157 (163,217 ) — (436,231 ) — 8,698 1,472,035 Construction in progress 755,508 1,625,218 (16,162 ) (1,709,735 ) — — 5,053 659,882 ￦ 12,933,460 3,866,027 (264,877 ) (252,250 ) (3,151,339 ) (1,745 ) 247,801 13,377,077 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized impairment losses for obsolete assets for the year ended December 31, 2020. (*3) Includes assets from the acquisition of Broadband Nowon Co., Ltd. and from the merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd., a subsidiary of the Parent Company.

Investment Property (Table)

Investment Property (Table)	12 Months Ended
	Dec. 31, 2021
Disclosure of detailed information about investment property [abstract]
Disclosure Of Detailed Information AboutInvestment Property Explanatory	(1) Investment property as of December 31, 2021 is as follows: (In millions of won) December 31, 2021 Acquisition cost Accumulated Carrying amount Land ￦ 6,071 — 6,071 Buildings 21,021 (13,668 ) 7,353 Right-of-use 12,577 (2,967 ) 9,610 ￦ 39,669 (16,635 ) 23,034 (2) Changes in Investment property for the year ended December 31, 2021 are as follows: (In millions of won) 2021 Beginning balance ￦ — Transfer 23,034 Ending balance ￦ 23,034

Lease (Tables)

Lease (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of right of use assets	1) Details of the right-of-use follows: (In millions of won) December 31, December 31, Land, buildings and structures ￦ 1,392,925 1,269,753 Others 166,408 202,282 ￦ 1,559,333 1,472,035
Summary of amounts recognized in the condensed consolidated interim statements of income of leases	2) Details of amounts recognized in the consolidated statements of income for the years ended December 31, 2021, follows: (In millions of won) 2021 2020 2019 Depreciation of right-of-use Land, buildings and structures ￦ 338,304 347,166 359,755 Others 95,666 89,065 89,062 ￦ 433,970 436,231 448,817 Interest expense on lease liabilities(*) ￦ 23,998 22,976 25,981 Expenses related to short-term leases(*) 25,435 20,193 19,098 Expenses related to leases of low-value 3,772 3,297 2,550 (*) Includes amounts related to discontinued operations.
Summary of maturity analysis of finance lease receivables	The following table sets out a maturity analysis for lease receivables, presenting the undiscounted lease payments to be received subsequent to December 31, 2021. (In millions of won) Amount Less than 1 year ￦ 22,497 1 ~ 2 years 11,124 2 ~ 3 years 10,425 3 ~ 4 years 3,619 4 ~ 5 years 58 More than 5 years 6 Undiscounted lease payments ￦ 47,729 Unrealized finance income 867 Net investment in the lease 46,862
Summary of maturity analysis of operating lease receivables	The following table sets out a maturity analysis of lease payments, presenting the undiscounted fixed payments to be received subsequent to December 31, 2021. (In millions of won) Amount Less than 1 year ￦ 170,575 1 ~ 2 years 113,524 2 ~ 3 years 51,433 3 ~ 4 years 1,409 4 ~ 5 years 808 More than 5 years 1,935 ￦ 339,684

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of goodwill	(1) Goodwill as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Goodwill related to merger of Shinsegi Telecom, Inc. ￦ 1,306,236 1,306,236 Goodwill related to acquisition of SK Broadband Co., Ltd. 764,082 764,082 Goodwill related to acquisition of Life & Security Holdings Co., Ltd.(*) — 1,176,274 Other goodwill(*) 2,175 110,932 ￦ 2,072,493 3,357,524 (*) Transferred to the spin-off
Details of the changes in goodwill	(3) Details of the changes in goodwill for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 2020 Beginning balance ￦ 3,357,524 2,949,530 Acquisition(*) 111,928 408,531 Impairment loss — (519) Other (43 ) (18 ) Spin-off (1,396,916 ) — Ending balance ￦ 2,072,493 3,357,524 (*) It consists of goodwill recognized as T map Mobility Co., Ltd.’s acquisition of YLP Inc. and another company, goodwill recognized as DREAMUS COMPANY’s acquisition of Studio Dolphin Co., Ltd. and goodwill recognized from One Store Co., Ltd.’s acquisition of Rokmedia Co., Ltd. for the year ended December 31, 2021. (See Note 11)

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Summary of intangible assets	(1) Intangible assets as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Acquisition cost Accumulated Accumulated Carrying Frequency usage rights(*1) ￦ 7,221,735 (4,476,046 ) (186,000 ) 2,559,689 Land usage rights 48,318 (45,586 ) — 2,732 Industrial rights 92,332 (36,342 ) (36 ) 55,954 Development costs 34,393 (34,193 ) — 200 Facility usage rights 156,062 (138,188 ) — 17,874 Customer relations 507,581 (180,324 ) — 327,257 Club memberships(*2) 113,300 — (24,806 ) 88,494 Brands(*2) — — — — Other(*3) 4,347,971 (3,524,002 ) (6,400 ) 817,569 ￦ 12,521,692 (8,434,681 ) (217,242 ) 3,869,769 (In millions of won) December 31, 2020 Acquisition cost Accumulated Accumulated Carrying Frequency usage rights(*1) ￦ 6,210,882 (4,079,729 ) (198,388 ) 1,932,765 Land usage rights 50,503 (45,783 ) — 4,720 Industrial rights 116,889 (45,300 ) (147 ) 71,442 Development costs 67,989 (54,771 ) (3,854 ) 9,364 Facility usage rights 159,865 (137,985 ) — 21,880 Customer relations 1,091,146 (171,283 ) — 919,863 Club memberships(*2) 139,349 — (32,484 ) 106,865 Brands(*2) 374,096 — — 374,096 Other(*3) 4,604,077 (3,586,596 ) (22,282 ) 995,199 ￦ 12,814,796 (8,121,447 ) (257,155 ) 4,436,194 (*1) The Group was reassigned 800 MHz, 1.8 GHz and 2.1 GHz band of frequency license s ￦ ￦ ￦ ￦ ￦ (*2) Club memberships and Brands are classified as intangible assets with indefinite useful lives and are not amortized. (*3) Other intangible assets primarily consist of computer software and others.
Details of the changes in intangible assets	(3) Research and development expenditures recognized as expense for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Research and development costs expensed as incurred(*) ￦ 406,672 416,445 391,327 (*) Includes amounts related to discontinued operations.
Intangible assets other than goodwill [Member]
Statement [LineItems]
Details of the changes in intangible assets	(2) C (In millions of won) 2021 Beginning Acquisition Disposal Transfer Amorti- Reversal (Impairment) Business tion(*3) Spin-off Ending Frequency usage rights ￦ 1,932,765 1,145,999 — — (519,075 ) — — — 2,559,689 Land usage rights 4,720 175 (76 ) — (2,087 ) — — — 2,732 Industrial rights 71,442 5,158 (8 ) 390 (6,377 ) (36 ) — (14,615 ) 55,954 Development costs 9,364 1,279 (150 ) — (3,210 ) — — (7,083 ) 200 Facility usage rights 21,880 1,690 (21 ) 328 (6,003 ) — — — 17,874 Customer relations 919,863 4,854 (461 ) — (53,342 ) — 4,705 (548,362 ) 327,257 Club memberships 106,865 6,518 (9,925 ) — — 653 — (15,617 ) 88,494 Brands 374,096 — — — — — — (374,096 ) — Other 995,199 80,713 (4,580 ) 276,890 (421,213 ) (111 ) 5,059 (114,388 ) 817,569 ￦ 4,436,194 1,246,386 (15,221 ) 277,608 (1,011,307 ) 506 9,764 (1,074,161 ) 3,869,769 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized the difference between recoverable amount and the carrying amount of intangible assets amounting to ￦ ￦ (*3) Includes assets from the acquisition of YLP Co., Ltd. and another company by T map Mobility Co., Ltd., and Rokmedia Co., Ltd. by One Store Co., Ltd. (In millions of won) 2020 Beginning Acquisition Disposal Transfer Amortization Impairment Business Ending Frequency usage rights ￦ 2,647,501 — — — (516,348 ) (198,388 ) — 1,932,765 Land usage rights 7,349 550 (100 ) — (3,079 ) — — 4,720 Industrial rights 66,824 1,836 (513 ) 8,281 (4,825 ) (161 ) — 71,442 Development costs 11,146 1,141 (294 ) 3,302 (4,644 ) (1,287 ) — 9,364 Facility usage rights 25,832 1,810 (3 ) 434 (6,193 ) — — 21,880 Customer relations 591,371 2,014 (1,604 ) 491 (52,849 ) — 380,440 919,863 Club memberships 80,410 11,821 (35,432 ) 544 — (323 ) 49,845 106,865 Brands(*4) 374,096 — — — — — — 374,096 Other 1,061,563 112,011 (13,729 ) 272,433 (430,719 ) (6,410 ) 50 995,199 ￦ 4,866,092 131,183 (51,675 ) 285,485 (1,018,657 ) (206,569 ) 430,335 4,436,194 (*1) Includes amounts related to discontinued operations. (*2) The Group recognized the difference between recoverable amount and the carrying amount of intangible assets amounting to ￦ (*3) Includes assets from the acquisition of Broadband Nowon Co., Ltd. and from the merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd., a subsidiary of the Parent Company. (*4) Brands are recognized in connection with the acquisition of Life & Security Holdings Co., Ltd.
Frequency usage rights [member]
Statement [LineItems]
Details of the changes in intangible assets	(4) Details of frequency usage rights as of December 31, 2021 are as follows: (In millions of won) Amount Description Commencement Completion of 800MHz license ￦ 197,620 LTE service Ju Jun 1.8GHz license 520,100 LTE service Dec Dec 2.6GHz license 607,090 LTE service Sep Dec 2.1GHz license 390,882 W-CDMA and LTE service Dec Dec 3.5GHz license 833,034 5G service Apr Nov 28GHz license 10,963 5G service Jan Nov ￦ 2,559,689

Borrowings and Debentures (Tabl

Borrowings and Debentures (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Short-term borrowings	(1) Short-term borrowings as of December 31, 2021 and 2020 are as follows: (In millions of won) Lender Annual interest rate (%) December 31, December 31, 2020 Short-term borrowings Citibank 2.45 ￦ — 50,000 KEB Hana Bank(*1,3) FTP 1M +1.01 — 27,000 KEB Hana Bank(*2,3) 6M financial I (bank) — 5,000 Shinhan Bank(*2,3) 6M financial I (bank) — 15,000 Hana Financial Investment Co., Ltd. 4.20 4,642 4,642 DB Financial Investment Co., Ltd. 4.00 2,785 2,785 Shinhan Financial Investment Co., Ltd. 4.20 5,571 5,571 ￦ 12,998 109,998 (*1) 1M FTP rate is 1.14% as of December 31, 2020. (*2) 6M financial I (bank) rate is 0.92% as of December 31, 2020. (*3) Transferred to the spin-off
Long-term borrowings	(2) Long-term borrowings as of December 31, 2021 and 2020 are as follows: (In millions of won and thousands of other currencies) Lender Annual interest rate (%) Maturity December 31, December 31, 2020 Korea Development Bank(*1) 3M CD + 0.61 Dec. 20, 2021 ￦ — 12,250 Korea Development Bank(*1,2) 3M CD + 0.71 Dec. 21, 2022 12,500 25,000 Korea Development Bank(*3) 1.87 Feb. 10, 2026 50,000 — Credit Agricole CIB(*1,4) 3M CD + 0.82 Dec. 14, 2023 25,000 37,500 Export Kreditnamnden(*5) 1.70 Apr. 29, 2022 6,746 (USD 5,690) 18,726 Shinhan Bank and others(*6) 3.20 Oct. 5, 2025 — 1,950,000 UBS(*6) 0.00 Mar. 28, — 617 (CHF 500) FAE(*6) 0.00 May 7, 2025 — 617 (CHF 500 ) Mizuho bank, Ltd. 1.35 May 20, 2024 100,000 — DBS bank Ltd. 1.32 May 28, 2024 200,000 — 394,246 2,044,710 Less present value discount (59 ) (15,786 ) 394,187 2,028,924 Less current installments (41,065 ) (49,663 ) ￦ 353,122 1,979,261 (*1) 3M CD rate are 1.29% and 0.66% as of December 31, 2021 and 2020, respectively. (*2) The long-term borrowings are to be repaid by installments on an annual basis from 2018 to 2022. (*3) The long-term borrowings are to be repaid by installments on an annual basis from 2022 to 2026. (*4) The long-term borrowings are to be repaid by installments on an annual basis from 2020 to 2023. (*5) The long-term borrowings are to be repaid by installments on an annual basis from 2014 to 2022. (*6) Transferred to the spin-off
Debentures	(3) Debentures as of December 31, 2021 and 2020 are as follows: (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured corporate bonds Operating fund 2021 4.22 ￦ — 190,000 Unsecured corporate bonds Operating and refinancing fund 2022 3.30 140,000 140,000 Unsecured corporate bonds 2032 3.45 90,000 90,000 Unsecured corporate bonds Operating fund 2023 3.03 230,000 230,000 Unsecured corporate bonds 2033 3.22 130,000 130,000 Unsecured corporate bonds 2024 3.64 150,000 150,000 Unsecured corporate bonds Refinancing fund 2021 2.66 — 150,000 Unsecured corporate bonds 2024 2.82 190,000 190,000 Unsecured corporate bonds Operating and refinancing fund 2022 2.40 100,000 100,000 Unsecured corporate bonds 2025 2.49 150,000 150,000 (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured corporate bonds 2030 2.61 50,000 50,000 Unsecured corporate bonds Operating fund 2025 2.66 70,000 70,000 Unsecured corporate bonds 2030 2.82 90,000 90,000 Unsecured corporate bonds Operating and refinancing fund 2025 2.55 100,000 100,000 Unsecured corporate bonds 2035 2.75 70,000 70,000 Unsecured corporate bonds Operating fund 2021 1.80 — 100,000 Unsecured corporate bonds 2026 2.08 90,000 90,000 Unsecured corporate bonds 2036 2.24 80,000 80,000 Unsecured corporate bonds 2021 1.71 — 50,000 Unsecured corporate bonds 2026 1.97 120,000 120,000 Unsecured corporate bonds 2031 2.17 50,000 50,000 Unsecured corporate bonds Refinancing fund 2022 2.17 120,000 120,000 Unsecured corporate bonds 2027 2.55 100,000 100,000 Unsecured corporate bonds Operating and refinancing fund 2032 2.65 90,000 90,000 Unsecured corporate bonds Operating and refinancing fund 2022 2.63 80,000 80,000 Unsecured corporate bonds Refinancing fund 2027 2.84 100,000 100,000 Unsecured corporate bonds 2021 2.57 — 110,000 Unsecured corporate bonds 2023 2.81 100,000 100,000 Unsecured corporate bonds 2028 3.00 200,000 200,000 Unsecured corporate bonds 2038 3.02 90,000 90,000 Unsecured corporate bonds Operating and refinancing fund 2021 2.10 — 100,000 Unsecured corporate bonds 2023 2.33 150,000 150,000 Unsecured corporate bonds 2038 2.44 50,000 50,000 Unsecured corporate bonds Operating fund 2022 2.03 180,000 180,000 Unsecured corporate bonds 2024 2.09 120,000 120,000 Unsecured corporate bonds 2029 2.19 50,000 50,000 Unsecured corporate bonds 2039 2.23 50,000 50,000 Unsecured corporate bonds Operating and refinancing fund 2022 1.40 120,000 120,000 Unsecured corporate bonds 2024 1.49 60,000 60,000 Unsecured corporate bonds 2029 1.50 120,000 120,000 Unsecured corporate bonds 2039 1.52 50,000 50,000 Unsecured corporate bonds 2049 1.56 50,000 50,000 Unsecured corporate bonds Operating fund 2022 1.69 230,000 230,000 Unsecured corporate bonds 2024 1.76 70,000 70,000 Unsecured corporate bonds 2029 1.79 40,000 40,000 Unsecured corporate bonds 2039 1.81 60,000 60,000 Unsecured corporate bonds Operating and refinancing fund 2023 1.64 170,000 170,000 Unsecured corporate bonds Operating fund 2025 1.75 130,000 130,000 Unsecured corporate bonds 2030 1.83 50,000 50,000 Unsecured corporate bonds 2040 1.87 70,000 70,000 (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured corporate bonds Refinancing fund 2025 1.40 140,000 140,000 Unsecured corporate bonds 2030 1.59 40,000 40,000 Unsecured corporate bonds 2040 1.76 110,000 110,000 Unsecured corporate bonds Refinancing fund 2024 1.17 80,000 — Unsecured corporate bonds 2026 1.39 80,000 — Unsecured corporate bonds 2031 1.80 50,000 — Unsecured corporate bonds 2041 1.89 100,000 — Unsecured corporate bonds Refinancing fund 2024 2.47 90,000 — Unsecured corporate bonds 2026 2.69 70,000 — Unsecured corporate bonds 2041 2.68 40,000 — Unsecured corporate bonds(*1) Operating and refinancing fund 2021 1.77 — 120,000 Unsecured corporate bonds(*1) Operating fund 2022 2.26 150,000 150,000 Unsecured corporate bonds(*1) Operating and refinancing fund 2022 2.70 140,000 140,000 Unsecured corporate bonds(*1) 2021 2.59 — 70,000 Unsecured corporate bonds(*1) 2023 2.93 80,000 80,000 Unsecured corporate bonds(*1) Refinancing fund 2022 2.00 50,000 50,000 Unsecured corporate bonds(*1) 2024 2.09 160,000 160,000 Unsecured corporate bonds(*1) Operating and refinancing fund 2022 1.71 80,000 80,000 Unsecured corporate bonds(*1) 2024 1.71 100,000 100,000 Unsecured corporate bonds(*1) 2026 1.86 50,000 50,000 Unsecured corporate bonds(*1) Refinancing fund 2023 1.48 100,000 100,000 Unsecured corporate bonds(*1) Operating and refinancing fund 2025 1.64 100,000 100,000 Unsecured corporate bonds(*1) Refinancing fund 2025 1.41 160,000 160,000 Unsecured corporate bonds(*1) Refinancing fund 2024 1.69 100,000 — Private placement corporate bonds(*2) Operating fund 2023 — — 6,292 Private placement corporate bonds(*2) Operating fund 2023 — — 6,222 Private placement corporate bonds(*2) Operating fund 2023 — — 6,168 Private placement corporate bonds(*2) Operating fund 2023 — — 6,100 (In millions of won and thousands of U.S. dollars) Purpose Maturity Annual interest rate (%) December 31, December 31, Unsecured global bonds Operating fund 2027 6.63 474,200 (USD 435,200 (USD Unsecured global bonds 2023 3.75 592,750 (USD 544,000 (USD Unsecured global bonds(*1) Refinancing fund 2023 3.88 355,650 (USD 326,400 (USD Floating rate notes(*3) Operating fund 2025 3M LIBO + 0.91 355,650 (USD 326,400 (USD 8,448,250 8,606,782 Less discounts on bonds (21,567 ) (27,039 ) 8,426,683 8,579,743 Less current installments of bonds (1,389,259 ) (889,574 ) ￦ 7,037,424 7,690,169 (*1) Unsecured corporate bonds were issued by SK Broadband Co., Ltd., a subsidiary of the Parent Company. (*2) Transferred to the spin-off (*3) 3M LIBOR rates are 0.21% and 0.24% as of December 31, 2021 and 2020, respectively.

Long-term Payables - other (Tab

Long-term Payables - other (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of Long-term payables - other	(1) Long-term payables — other as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Payables related to acquisition of frequency usage rights ￦ 1,611,010 1,141,723 Other — 631 ￦ 1,611,010 1,142,354
Summary of Long-term payables - other	(2) As of December 31, 2021 and 2020, details of long-term payables — other which consist of payables related to the acquisition of frequency usage rights are as follows (See Note 17): (In millions of won) December 31, 2021 December 31, 2020 Long-term payables — other ￦ 2,090,715 1,626,040 Present value discount on long-term payables — other (80,882 ) (59,717 ) Current installments of long-term payables — other (398,823 ) (424,600 ) Carrying amount at December 31 ￦ 1,611,010 1,141,723
Repayment schedule of the principal amount of long-term payables - other related to acquisition of frequency usage rights	(3) The principal amounts of the long-term payables — other repaid for the year ended December 31, 2021 and 2020 are ￦ (In millions of won) Amount Less than 1 year ￦ 400,245 1~3 years 769,395 3~5 years 738,300 More than 5 years 182,775 ￦ 2,090,715

Provisions (Tables)

Provisions (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Changes in provisions	Changes in provisions for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 As of December 31, Beginning Increase Utilization Reversal Other Business Combination Spin-off Ending Current Non-current Provision for restoration ￦ 113,653 12,648 (6,283 ) (440 ) 172 — (5,019 ) 114,731 59,204 55,527 Emission allowance 7,424 1,368 (1,091 ) (5,816 ) — — — 1,885 1,885 — Other provisions 29,800 1,655 (18,909 ) (1,820 ) — 385 (732 ) 10,379 567 9,812 ￦ 150,877 15,671 (26,283 ) (8,076 ) 172 385 (5,751 ) 126,995 61,656 65,339 (In millions of won) 2020 As of December 31, 2020 Beginning Increase Utilization Reversal Other Business Combination Ending Current Non-current Provision for restoration ￦ 102,519 15,616 (3,610 ) (1,492 ) (6 ) 626 113,653 42,348 71,305 Emission allowance 5,257 7,400 — (5,233 ) — — 7,424 7,424 — Other provisions(*) 57,385 3,250 (30,861 ) (1,904 ) (199 ) 2,129 29,800 19,591 10,209 ￦ 165,161 26,266 (34,471 ) (8,629 ) (205 ) 2,755 150,877 69,363 81,514 (*) ￦

Defined Benefit Liabilities (_2

Defined Benefit Liabilities (Assets) (Tables)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Details of defined benefit liabilities (assets)	(1) Details of defined benefit liabilities (assets) as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, December 31, Present value of defined benefit obligations ￦ 1,035,016 1,278,550 Fair value of plan assets (1,040,286 ) (1,127,163 ) Defined benefit assets(*) (18,427 ) (3,557 ) Defined benefit liabilities 154,944 (*) Since the Group entities neither have legally enforceable right nor intention to settle the defined benefit obligations of Group entities with defined benefit assets of other Group entities, defined benefit assets of Group entities have been separately presented from defined benefit liabilities.
Principal actuarial assumptions	(2) Principal actuarial assumptions as of December 31, 2021 and 2020 are as follows: December 31, 2021 December 31, 2020 Discount rate for defined benefit obligations 2.35 ~ 3.29% 1.83 ~ 3.14% Expected rate of salary increase 2.00 ~ 5.29% 2.04 ~ 6.00%
Cost of benefit plan recognized in profit and loss	(5) Total cost of benefit plan, which is recognized in profit and loss (included in labor in the statement of income) and capitalized into construction-in-progress, (In millions of won) For the year ended December 31 2021 2020 Current service cost(*) ￦ 186,395 193,078 Past service cost — 815 Net interest cost(*) 4,067 4,901 ￦ 190,462 198,794 (*) Includes amounts related to discontinued operations.
Details of plan assets	(6) Details of plan assets as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, December 31, Equity instruments ￦ 25,083 15,770 Debt instruments 228,534 228,839 Short-term financial instruments, etc. 786,669 882,554 ￦ 1,040,286 1,127,163
Effects on defined benefit obligations if each of significant actuarial assumptions changes within expectable and reasonable range	(7) As of December 31, 2021, effects on defined benefit obligations if each of significant actuarial assumptions changes within expectable and reasonable range are as follows: (In millions of won) 0.5% 0.5% Discount rate ￦ (43,702) 47,870 Expected salary increase rate 47,552 (43,940 )
Retirement benefit obligation [Member]
Statement [LineItems]
Changes in defined benefit liabilities (assets)	(3) Changes in defined benefit obligations for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) For the year ended December 31 2021 2020 Beginning balance ￦ 1,278,550 1,136,787 Current service cost(*1) 186,395 193,078 Past service cost — 815 Interest cost(*1) 28,617 25,958 Remeasurement - Demographic assumption (794 ) 2,071 - Financial assumption (29,399 ) (18,266 ) - Adjustment based on experience 5,773 17,364 Business combinations — 1,742 Benefit paid (114,897 ) (76,987 ) Spin-off (318,476 ) — Others(*2) (753 ) (4,012 ) Ending balance ￦ 1,035,016 1,278,550 (*1) Includes amounts related to discontinued operations. (*2) Others include changes of liabilities due to employee’s transfers among affiliates for the years ended December 31, 2021 and 2020.
Plan assets [member]
Statement [LineItems]
Changes in defined benefit liabilities (assets)	(4) Changes in plan assets for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) For the year ended December 31 2021 2020 Beginning balance ￦ 1,127,163 965,654 Interest income(*) 24,550 21,057 Remeasurement (3,798 ) (1,385 ) Contributions 152,208 213,298 Benefit paid (100,511 ) (68,084 ) Business combinations — 485 Spin-off (157,522 ) — Others (1,804 ) (3,862 ) Ending balance ￦ 1,040,286 1,127,163 (*) Includes amounts related to discontinued operations.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Currency and interest rate swap contracts under cash flow hedge accounting	(1) Currency and interest rate swap contracts under cash flow hedge accounting as of December 31, 2021 are as follows: (In millions of won and thousands of U.S. dollars) Borrowing Hedging Instrument (Hedged item) Hedged risk Financial Duration of Jul. 20, 2007 Fixed-to-fixed face value of USD 400,000) Foreign currency risk Morgan Stanley and four other banks Jul. 20, 2007 ~ Dec. 16, 2013 Fixed-to-fixed (U.S. dollar borrowing amounting to USD 5,690) Foreign currency risk Deutsche bank Dec.16, 2013 ~ Apr. 29, 2022 Apr. 16, 2018 Fixed-to-fixed (U.S. dollar denominated bonds face value of USD 500,000) Foreign currency risk The Export-Import Bank of Korea and three other banks Apr. 16, 2018 ~ Apr. 16, 2023 Mar. 4, 2020 Floating-to-fixed (U.S. dollar-denominated bonds face value of USD 300,000) Foreign currency risk and Interest rate risk Citibank Mar. 4, 2020 ~ Jun. 4, 2025 Aug. 13, 2018 Fixed-to-fixed (U.S. dollar denominated bonds face value of USD 300,000) Foreign currency risk Citibank Aug. 13, 2018 ~ Aug. 13, 2023 Dec. 21, 2017 Floating-to-fixed (Korean won borrowing amounting to KRW 12,500) Interest rate risk Korea Development Bank Dec. 21, 2017 ~ Dec. 21, 2022 Dec. 19, 2018 Floating-to-fixed (Korean won borrowing amounting to KRW 25,000) Interest rate risk Credit Agricole CIB Mar.19, 2019 ~ Dec.14, 2023
Details of fair values of the above derivatives recorded in assets or liabilities	As of December 31, 2021, details of fair values of the derivatives assets and liabilities are as follows: (In millions of won and thousands of U.S. dollars) Hedging instrument (Hedged item) Cash flow hedge Fair value Current assets: Fixed-to-fixed ￦ 427 427 Non-current Fixed-to-fixed ￦ 74,555 74,555 Fixed-to-fixed 75,069 75,069 Fixed-to-fixed 30,150 30,150 Floating-to-fixed cross currency interest rate swap (U.S dollar denominated bonds face value of USD 300,000) 2,460 2,460 ￦ 182,661 182,661 Current liabilities: Floating-to-fixed ￦ (52) (52) Non-current Floating-to-fixed ￦ (59) (59) ￦ (111 ) (111 )
Detailed information about f financial instruments under cash flow hedge	As of December 31, 2021, details of fair values of the derivative assets and liabilities are as follows: (In millions of won) Held for trading Fair value Current assets: Contingent subscription right ￦ 9,524 9,524 Subscription right 15,477 15,477 Total return swap 4,682 4,682 Non-current Total return swap ￦ 5,250 5,250 ￦ 34,933 34,933 Non-current Share option ￦ (321,025) (321,025 )

Share Capital and Capital Sur_2

Share Capital and Capital Surplus and Others (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Number of authorized, issued and outstanding common shares and the details of capital surplus and others	(1) Details of share capital as of December 31, 2021 and 2020 are as follows: (In millions of won, except for share data) December 31, 2021 December 31, 2020 Number of authorized shares(*1) 670,000,000 220,000,000 Par value (in won)(*1) 100 500 Number of issued shares 218,833,144 80,745,711 Share capital: Common share(*2) ￦ 30,493 44,639 (*1) As a result of stock split and spin-off, ￦ ￦ (*2) The Parent Company’s share capital decreased by ￦ spin-off (4) Details of capital surplus and others as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Paid-in ￦ 1,771,000 2,915,887 Treasury shares(Note 24) (57,314 ) (2,123,661 ) Hybrid bonds(Note 25) 398,759 398,759 Share option(Note 26) 47,166 1,481 Others(*) (13,783,337 ) (515,263 ) ￦ (11,623,726 ) 677,203 (*) The amount for 2021 primarily consists of a change in equity amounting to ￦
Details of shares outstanding	(3) Details of shares outstanding as of December 31, 2021 and 2020 are as follows: (In shares) 2021 2020 Issued shares Treasury Outstanding Issued Treasury Outstanding Shares outstanding 218,833,144 1,250,992 217,582,152 80,745,711 9,418,558 71,327,153
Disclosure of Reconciliation of number of shares outstanding	(2) Changes in issued shares for the years ended December 31, 2021 and 2020 are as follows: (In shares) 2021 2020 Issued shares at January 1 80,745,711 80,745,711 Retirement of treasury shares(*1) (8,685,568 ) — Stock split(*2) 288,240,572 — Spin-off(*3) (141,467,571 ) — Issued shares at December 31 218,833,144 80,745,711 (*1) The Parent Company retired 8,685,568 treasury shares with reduction of its retained earnings before appropriation. (*2) The stock split of the Parent Company’s common share was approved at the shareholders’ meeting held on October 12, 2021. The stock split was effective from October 28, 2021. The par value of issued shares has changed from ￦ ￦ (*3) The allocation of new shares to shareholders of the spin-off ￦
Disclosure of Allocation of new shares to shareholders	Surviving Company Spin-off Company Company name SK Telecom Co SK Square Co Common shares (in shares) 0.6073625 0.3926375

Treasury Shares (Tables)

Treasury Shares (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of treasury share	(1) Treasury shares as of December 31, 2021 and 2020 are as follows: (In millions of won, except for share data) December 31, December 31, Number of shares 1,250,992 9,418,558 Acquisition cost ￦ 57,314 2,123,661
Summary of changes in treasury shares	(2) Changes in treasury shares for the years ended December 31, 2021 and 2020 are as follows: (In shares) 2021 2020 Treasury shares at January 1 9,418,558 7,609,263 Acquisition(*1) 288,000 1,809,295 Disposal(*2) (626,740 ) — Retirement of treasury shares(*3) (8,685,568 ) — Stock split(*4) 1,577,000 — Spin-off(*5) (719,955 ) — Disposal(*6) (303 ) — Treasury shares at December 31 1,250,992 9,418,558 (*1) The Parent Company acquired 288,000 of its treasury shares for ￦ ￦ (*2) The Parent Company distributed 626,240 treasury shares (acquisition cost: ￦ spin-off, ￦ ￦ ￦ non-executive ￦ (*3) The Parent Company retired 8,685,568 treasury shares with reduction of its retained earnings before appropriation, as a result, the P a (*4) The stock split of the Parent Company’s common stock was approved at the shareholders’ meeting held on October 12, 2021, to increase the number of its outstanding shares, effective from October 28, 2021. (*5) 773,987 spin-off spin-off. ￦ spin-off. (*6) The Parent Company distributed 303 treasury shares (acquisition cost: ￦ spin-off ￦

Hybrid Bonds (Tables)

Hybrid Bonds (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of hybrid bonds	Hybrid bonds classified as equity as of December 31, 2021 and 2020 are as follows: (In millions of won) Type Issuance date Maturity(*1) Annual December 31, December 31, Series 2-1 Unsecured subordinated bearer bond June 7, 2018 June 7, 2078 3.70 ￦ 300,000 300,000 Series 2-2 Unsecured subordinated bearer bond June 7, 2018 June 7, 2078 3.65 100,000 100,000 Issuance costs (1,241 ) (1,241 ) ￦ 398,759 398,759 As there is no contractual obligation to deliver financial assets to the holders of hybrid bonds, the Group classified the hybrid bonds as equity. These are subordinated bonds which rank before common shares in the event of a liquidation or reorganization of the Parent Company. (*1) The Parent Company has a right to extend the maturity without any notice or announcement. (*2) Annual interest rate is determined as yield rate of 5-year step-up

Share based payment arrangeme_2

Share based payment arrangement (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of Terms and Conditions Related to Grants of Share Based Payment Arrangement	(1) The terms and conditions related to the grants of the share based payment arrangement are as follows: 1) Equity-settled share-based payment arrangement Parent Company 1-1 1-2 1-3 2 3 4 5(*2) 6(*2) Grant date March 24, 2017 February 20, February 22, March 26, 2019 March 26, 2020 March 25, 2021 Types of shares to be issued Registered common shares Grant method Reissue of treasury shares, cash settlement Number of shares (in shares)(*1) 67,320 67,320 67,320 4,124 12,685 5,266 381,937 94,657 Exercise price (in won)(*1) 49,350 53,298 57,562 50,824 53,052 50,862 38,452 50,276 Exercise period Mar. 25, 2019 ~ Mar. 24, 2022 Mar. 25, 2020 ~ Mar. 24, 2023 Mar. 25, 2021 ~ Mar. 24, 2024 Feb. 21, 2020 ~ Feb. 20, 2023 Feb. 23, 2021 ~ Feb. 22, 2024 Mar. 27, 2021 ~ Mar. 26, 2024 Mar. 27, 2023 ~ Mar. 26, 2027 Mar. 26, 2023 ~ Mar. 25, 2026 Vesting conditions 2 years’ service from the grant date 3 years’ service from the 4 years’ service 2 years’ service from 2 years’ service from 2 years’ service from the grant date 3 years’ service from the grant date 2 years’ service from the grant date 2) Cash-settled share-based payment arrangement Share appreciation rights of SK Telecom Co., Ltd.(*3) Share appreciation rights of SK Square Co., Ltd.(*3) Grant date January 1, 2021 Grant method Cash settlement Number of shares (in shares)(*1) 224,692 145,247 Exercise price (in won)(*1) 50,276 Exercise period Jan. 1, 2023 ~ Mar. 28, 2024 Vesting conditions 2 years’ service from the grant date (*1) Number of shares granted and exercise price are adjusted as a result of stock split and spin-off (*2) Parts of the grant that have not met the vesting conditions have been forfeited for the year ended December 31, 2021. (*3) The Parent Company newly established the long-term incentive policy as part of the compensation related to the growth of corporate value on the beginning of the year, and granted cash settled share appreciation rights to executives.
Summary of Share Compensation Expense Recognized	(2) Share compensation expense recognized for the year ended December 31, 2021 and the remaining share compensation expense to be recognized in subsequent periods are as follows: (In millions of won) Share As of December 31, 2020 ￦ 7,589 For the year ended December 31, 2021(*) 87,622 In subsequent periods 75,318 ￦ 170,529 A ￦ (*) Includes amounts related to discontinued operations.
Summary of Inputs Used in Binomial Option Pricing Model	(3) The Parent Company used binomial option pricing model in the measurement of the fair value of the share options at grant date and the inputs used in the model are as follows: 1) Equity-settled share-based payment arrangement (In won) Parent Company 1-1 1-2 1-3 2 3 4 5 6 Risk-free interest rate 1.86 % 1.95 % 2.07 % 2.63 % 1.91 % 1.78 % 1.52 % 1.55 % Estimated option’s life 5 years 6 years 7 years 5 years 5 years 5 years 7 years 5 years Share price (Closing price on the preceding day)(*) 52,500 52,500 52,500 48,700 51,800 50,600 34,900 49,800 Expected volatility 13.38 % 13.38 % 13.38 % 16.45 % 8.30 % 7.70 % 8.10 % 25.70 % Expected dividends 3.80 % 3.80 % 3.80 % 3.70 % 3.80 % 3.90 % 5.70 % 4.00 % Exercise price(*) 49,350 53,298 57,562 50,824 53,052 50,862 38,452 50,276 Per-share 5,403 4,048 3,096 4,798 1,720 1,622 192 8,142 2) Cash-settled share-based payment arrangement (In won) Share appreciation rights of SK Telecom Co., Ltd. Share appreciation rights of SK Square Co., Ltd. Risk-free interest rate 1.71 % 1.71 % Estimated option’s life 3.25 years 3.25 years Share price on the remeasurement date 57,900 66,400 Expected volatility 26.00 % 26.00 % Expected dividends 3.40 % 0.00 % Exercise price(*) 50,276 50,276 Per-share 10,646 20,321 (*) Share price (closing price on the preceding day), exercise price and per-share spin-off

Retained Earnings (Tables)

Retained Earnings (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of retained earnings	(1) Retained earnings as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Appropriated: Legal reserve ￦ 22,320 22,320 Reserve for business expansion 11,631,138 11,631,138 Reserve for technology development 4,365,300 4,365,300 15,996,438 15,996,438 Unappropriated 6,418,583 6,963,155 ￦ 22,437,341 22,981,913

Reserves (Tables)

Reserves (Tables)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Details of reserves, net of taxes	(1) Details of reserves, net of taxes, as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Valuation gain on FVOCI ￦ 633,240 438,979 Other comprehensive gain (loss) of investments in associates and joint ventures 53,770 (392,333 ) Valuation gain on derivatives 33,918 17,615 Foreign currency translation differences for foreign operations 14,310 (24,122 ) ￦ 735,238 40,139
Changes in reserves	(2) Changes in reserves for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) Valuation gain Other Valuation gain Foreign currency Total Balance at January 1, 2020 ￦ (47,086 ) (278,142 ) (920 ) (3,428 ) (329,576 ) Changes, net of taxes 486,065 (114,191 ) 18,535 (20,694 ) 369,715 Balance at December 31, 2020 ￦ 438,979 (392,333 ) 17,615 (24,122 ) 40,139 Changes, net of taxes 194,261 446,103 16,303 38,432 695,099 Balance at December 31, 2021 ￦ 633,240 53,770 33,918 14,310 735,238
Valuation gain (loss) on available-for-sale financial assets [Member]
Statement [LineItems]
Changes in reserves	(3) Changes in valuation gain (loss) on financial assets at FVOCI for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 2020 Balance at January 1 ￦ 438,979 (47,086 ) Amount recognized as other comprehensive income for the year, net of taxes 627,833 486,440 Amount reclassified to retained earnings, net of taxes (12,429 ) (375 ) Changes from spin-off, (421,143 ) — Balance at December 31 ￦ 633,240 438,979
Valuation gain (loss) on derivatives [Member]
Statement [LineItems]
Changes in reserves	(4) Changes in valuation gain (loss) on derivatives for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 2020 Balance at January 1 ￦ 17,615 (920 ) Amount recognized as other comprehensive income for the year, net of taxes 9,731 15,414 Amount reclassified to profit, net of taxes 6,572 3,121 Balance at December 31 ￦ 33,918 17,615

Other Operating Income and Ex_2

Other Operating Income and Expenses (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Details of other operating income and expenses	Details of other operating income and (In millions of won) 2021 2020 2019 Other Operating Income: Gain on disposal of property and equipment and intangible assets ￦ 39,136 34,625 7,755 Others(*) 76,627 61,126 87,828 ￦ 115,763 95,751 95,583 Other Operating Expenses: Communication ￦ 32,462 34,462 32,986 Utilities 350,678 336,187 315,129 Taxes and dues 33,935 34,577 38,688 Repair 425,606 399,376 368,620 Research and development 347,711 353,198 324,052 Training 31,761 33,384 32,581 Bad debt for accounts receivable — trade 29,402 45,002 25,376 Travel 7,813 7,534 20,717 Supplies and other 101,656 105,333 104,943 Loss on disposal of property and equipment and intangible assets 28,158 25,633 23,821 Impairment loss on property and equipment and intangible assets 3,135 200,705 42,823 Donations 12,800 16,051 16,782 Bad debt for accounts receivable — other 3,995 6,640 3,594 Others(*) 22,475 60,280 60,176 ￦ 1,431,587 1,658,362 1,410,288 (*) See note 4 (2).

Finance Income and Costs (Table

Finance Income and Costs (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Details of finance income and costs	(1) Details of finance income and costs for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Finance Income: Interest income ￦ 36,708 37,030 48,605 Gain on sale of accounts receivable — other 27,725 22,605 15,855 Dividends 12,039 1,170 10,011 Gain on foreign currency transactions 10,987 9,029 8,836 Gain on foreign currency translations 7,505 7,888 4,064 Gain relating to financial instruments at FVTPL 60,169 62,963 34,321 ￦ 155,133 140,685 121,692 Finance Costs: Interest expense ￦ 279,737 288,972 306,665 Loss on sale of accounts receivable — other — — 5,823 Loss on foreign currency transactions 12,270 11,053 10,038 Loss on foreign currency translations 6,764 8,973 4,242 Loss on disposal of long-term investment securities — 98 — Loss relating to financial instruments at FVTPL 16,833 13,847 8,144 ￦ 315,604 322,943 334,912
Details of interest income included in finance income	(2) Details of interest income included in finance income for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Interest income on cash equivalents and financial instruments(*) ￦ 16,141 24,378 29,854 Interest income on loans and others(*) 27,709 25,979 33,725 ￦ 43,850 50,357 63,579 (*) Includes amounts related to discontinued operations.
Details of interest expenses included in finance costs	(3) Details of interest expenses included in finance costs for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Interest expense on borrowings(*) ￦ 66,188 116,397 104,991 Interest expense on debentures(*) 224,144 225,309 224,765 Others(*) 52,010 57,470 76,331 ￦ 342,342 399,176 406,087 (*) Includes amounts related to discontinued operations.
Finance income and costs by category of financial instruments	(4) Finance income and costs by category of financial instruments for the years ended December 31, 2021, 2020 and 2019 are as follows. Bad debt expense (reversal of loss allowance) for accounts receivable — trade, loans and receivables are presented and explained separately in notes 6 and 3 5 1) Finance income and costs (In millions of won) 2021 Finance income(*) Finance costs(*) Financial Assets: Financial assets at FVTPL ￦ 149,590 67,503 Financial assets at FVOCI 3,413 142,015 Financial assets at amortized cost 48,940 12,262 Derivatives designated as hedging instrument — 600 201,943 222,380 Financial Liabilities: Financial liabilities at FVTPL — 8,036 Financial liabilities at amortized cost 607 355,011 607 363,047 ￦ 202,550 585,427 (*) Includes amounts related to discontinued operations. (In millions of won) 2020 Finance income(*1) Finance costs(*1) Financial Assets: Financial assets at FVTPL(*2) ￦ 180,254 10,894 Financial assets at FVOCI 993 44,832 Financial assets at amortized cost(*2) 46,135 24,601 Derivatives designated as hedging instrument — 1,867 227,382 82,194 Financial Liabilities: Financial liabilities at FVTPL — 12,115 Financial liabilities at amortized cost 6,434 400,678 Derivatives designated as hedging instrument 7,380 2,206 13,814 414,999 ￦ 241,196 497,193 (*1) Includes amounts related to discontinued operations. (*2) The Group reclassified the category of financial assets measured at amortized cost. Accordingly, the category of financial income arising on reclassification of a financial asset is reclassified. (In millions of won) 2019 Finance income(*1) Finance costs(*1) Financial Assets: Financial assets at FVTPL(*2) ￦ 79,529 13,577 Financial assets at FVOCI 9,924 — Financial assets at amortized cost(*2) 52,543 17,488 141,996 31,065 Financial Liabilities: Financial liabilities at FVTPL 56 43 Financial liabilities at amortized cost 103 406,206 Derivatives designated as hedging instrument — 641 159 406,890 ￦ 142,155 437,955 (*1) Includes amounts related to discontinued operations. (*2) The Group reclassified the category of financial assets measured at amortized cost. Accordingly, the category of financial income arising on reclassification of a financial asset is reclassified. 2) Other comprehensive income (loss) (In millions of won) 2021 2020 2019 Financial Assets: Financial assets at FVOCI ￦ 920,871 579,678 (17,943 ) Derivatives designated as hedging instrument 15,427 24,320 41,305 936,298 603,998 23,362 Financial Liabilities: Derivatives designated as hedging instrument 706 (5,182 ) (624 ) ￦ 937,004 598,816 22,738
Details of impairment losses for financial assets	(5) Details of impairment losses for financial assets for th e (In millions of won) 2021 2020 2019 Accounts receivable — trade(*) ￦ 31,546 48,625 28,841 Other receivables(*) 6,001 10,559 5,802 ￦ 37,547 59,184 34,643 (*) Includes amounts related to discontinued operations.

Income Tax Expense (Tables)

Income Tax Expense (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of income tax expenses	(1) Income tax expenses for the years ended December 31, 2021, 2020 and 2019 consist of the following: (In millions of won) 2021 2020 2019 Current tax expense: Current year ￦ 319,539 286,717 105,859 Current tax of prior years(*) 705 14,536 (6,855 ) 320,244 301,253 99,004 Deferred tax expense: Changes in net deferred tax assets 331,704 75,249 201,264 Income tax expense Tax expense of continuing operation 446,796 221,262 262,940 Tax expense of discontinued operation 205,152 155,240 37,328 ￦ 651,948 376,502 300,268 (*) Current tax of prior years are mainly composed of the income tax refund due to a change in the interpretation of the tax authority in relation to the income tax previously recognized by the Group.
Difference between income taxes computed using the statutory corporate income tax rates and the recorded income taxes	(2) The difference between income taxes computed using the statutory corporate income tax rates and the recorded income taxes for the years ended December 31, 2021, 2020 and 2019 is attributable to the following: (In millions of won) 2021 2020 2019 Income taxes at statutory income tax rate ￦ 834,146 505,824 308,913 Non-taxable (13,924 ) (41,084 ) (92,666 ) Non-deductible 15,329 31,882 14,630 Tax credit and tax reduction (62,075 ) (48,774 ) (32,877 ) Changes in unrecognized deferred taxes (68,589 ) (69,776 ) 83,940 Changes in tax rate (36,193 ) 24,537 4,050 Income tax refund and others (16,746 ) (26,107 ) 14,278 Income tax expense ￦ 651,948 376,502 300,268
Deferred taxes directly charged to (credited from) equity	(3) Deferred taxes directly charged to (credited from) equity for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Valuation gain (loss) on financial assets measured at fair value ￦ (208,490 ) (166,612 ) 2,983 Share of other comprehensive income (loss) of associates and joint ventures (34 ) (14 ) 2,279 Valuation loss on derivatives (5,709 ) (6,886 ) (16,083 ) Remeasurement of defined benefit liabilities (3,780 ) (164 ) 22,733 Gain on disposal of treasury shares and others 26,970 — — ￦ (191,043 ) (173,676 ) 11,912
Details of the changes in deferred tax assets (liabilities)	(4) Details of the changes in deferred tax assets (liabilities) for the years ended December 31, 2021 and 2020 are as follows: (In millions of won) 2021 Beginning Deferred tax Directly charged to (credited from) equity Business combinations Spin-off Ending Deferred tax assets (liabilities) related to temporary differences: Loss allowance ￦ 91,285 (8,397 ) — — (5,531 ) 77,357 Accrued interest income (1,631 ) (2,022 ) — — 3,487 (166 ) Financial assets measured at fair value (81,055 ) (6,765 ) (208,490 ) — 138,482 (157,828 ) Investments in subsidiaries, associates and joint ventures (1,673,906 ) (281,035 ) (34 ) — 1,923,158 (31,817 ) Property and equipment and intangible assets (511,862 ) (42,456 ) — (1,023 ) 249,374 (305,967 ) Provisions 6,294 (1,436 ) — — (660 ) 4,198 Retirement benefit obligation 102,285 (3,563 ) (3,780 ) — (42,610 ) 52,332 Valuation gain on derivatives 14,767 210 (5,709 ) — (2,932 ) 6,336 Gain or loss on foreign currency translation 21,774 (396 ) — — — 21,378 Incremental costs to acquire a contract (807,831 ) 53,492 — — 4,468 (749,871 ) Contract assets and liabilities (2,606 ) 405 — — — (2,201 ) Right-of-use (372,297 ) (35,851 ) — — 18,646 (389,502 ) Lease liabilities 362,476 38,600 — — (19,539 ) 381,537 Others 120,514 (95,537 ) 26,970 (135 ) 16,669 68,481 (2,731,793 ) (384,751 ) (191,043 ) (1,158 ) 2,283,012 (1,025,733 ) Deferred tax assets related to unused tax loss carryforwards and tax credit carryforwards: Tax loss carryforwards 88,223 7,915 — — (96,138 ) — Tax credit 39,583 45,132 — — (155 ) 84,560 127,806 53,047 — — (96,293 ) 84,560 ￦ (2,603,987 ) (331,704 ) (191,043 ) (1,158 ) 2,186,719 (941,173 ) (In millions of won) 2020 Beginning Deferred tax Directly charged to (credited from) equity Business combinations Ending Deferred tax assets (liabilities) related to temporary differences: Loss allowance ￦ 88,913 1,326 — 1,046 91,285 Accrued interest income (2,039 ) 435 — (27 ) (1,631 ) Financial assets measured at fair value 98,101 (17,586 ) (166,612 ) 5,042 (81,055 ) Investments in subsidiaries, associates and joint ventures (1,613,048 ) (60,844 ) (14 ) — (1,673,906 ) Property and equipment and intangible assets (371,489 ) (47,468 ) — (92,905 ) (511,862 ) Provisions 2,543 3,751 — — 6,294 Retirement benefit obligation 100,194 1,873 (164 ) 382 102,285 Valuation gain on derivatives 17,507 4,146 (6,886 ) — 14,767 Gain or loss on foreign currency translation 22,005 (231 ) — — 21,774 Incremental costs to acquire a contract (829,055 ) 21,224 — — (807,831 ) Contract assets and liabilities (28,030 ) 25,424 — — (2,606 ) Right-of-use (390,936 ) 18,639 — — (372,297 ) Lease liabilities 385,394 (22,918 ) — — 362,476 Others 64,620 (30,310 ) — 86,204 120,514 (2,455,320 ) (102,539 ) (173,676 ) (258 ) (2,731,793 ) Deferred tax assets related to unused tax loss carryforwards and tax credit carryforwards: Tax loss carryforwards 91,136 (2,913 ) — — 88,223 Tax credit 9,380 30,203 — — 39,583 100,516 27,290 — — 127,806 ￦ (2,354,804 ) (75,249 ) (173,676 ) (258 ) (2,603,987 )
Details of temporary differences, unused tax loss carryforwards and unused tax credits carryforwards which are not recognized as deferred tax assets	(5) Details of temporary differences, unused tax loss carryforwards and unused tax credits carryforwards which are not recognized as deferred tax assets (liabilities), in the consolidated statements of financial position as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Loss allowance ￦ 85,998 102,085 Investments in subsidiaries, associates and joint ventures (176,520 ) 8,365 Other temporary differences 61,368 68,415 Unused tax loss carryforwards 347,889 1,042,063 Unused tax credit carryforwards 34 1,037
Unused tax loss carryforwards and unused tax credit carryforwards which are not recognized as deferred tax assets	(6) The amount of unused tax loss carryforwards and unused tax credit carryforwards which are not recognized as deferred tax assets as of December 31, 2021 are expiring within the following periods: (In millions of won) Unused tax loss carryforwards Unused tax credit carryforwards Less than 1 year ￦ 57,346 — 1 ~ 2 years 39,974 — 2 ~ 3 years 19,087 — More than 3 years 231,482 34 ￦ 347,889 34

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of basic earnings per share	1) Basic earnings per share for the years ended December 31, 2021, 2020 and 2019 are calculated as follows: (In millions of won, except for share data) 2021 2020 2019 Basic earnings per share attributable to owners of the Parent Profit from continuing operation attributable to owners of the Parent Company ￦ 1,217,520 648,579 544,099 Interest on hybrid bonds (14,766 ) (14,766 ) (14,766 ) Profit from continuing operation attributable to owners of the Parent Company on common shares 1,202,754 633,813 529,333 Profit from discontinued operation attributable to owners of the Parent Company on common shares 1,190,003 855,773 344,598 Weighted average number of common shares outstanding 332,761,592 363,977,155 360,320,795 Basic earnings per share (in won) Continuing operation ￦3,614 1,741 1,469 Discontinued operation 3,576 2,352 956
Weighted average number of common shares outstanding	2) The weighted average number of common shares outstanding for the years ended December 31, 2021, 2020 and 2019 are calculated as follows: (In shares) 2021 Number of common shares Weighted average number of common shares Issued shares at January 1, 2021 403,728,555 403,728,555 Treasury shares at January 1, 2021 (47,092,790 ) (47,092,790 ) Acquisition of treasury shares (1,494,032 ) (1,383,241 ) Disposal of treasury shares 3,134,003 1,022,242 Spin-off (140,693,584 ) (23,513,174 ) 217,582,152 332,761,592 (In shares) 2020 Number of common shares Weighted average number of common shares Issued shares at January 1, 2020 403,728,555 403,728,555 Treasury shares at January 1, 2020 (38,046,315 ) (38,046,315 ) Acquisition of treasury shares (9,046,475 ) (1,705,085 ) 356,635,765 363,977,155 (In shares) 2019 Number of common shares Weighted average number of common shares Issued shares at January 1, 2019 403,728,555 403,728,555 Treasury shares at January 1, 2019 (44,379,415 ) (44,379,415 ) Disposal of treasury shares 6,333,100 971,655 365,682,240 360,320,795
Summary of detailed information of diluted earning per share	(2) Diluted earnings per share 1) Diluted earnings per share for the years ended December 31, 2021 and 2020 are calculated as follows: (In millions of won, except for share data) 2021 2020 Profit from continuing operation attributable to owners of the Parent Company on common shares ￦ 1,202,754 633,813 Profit from discontinued operation attributable to owners of the Parent Company on common shares 1,190,003 855,773 Adjusted weighted average number of common shares outstanding 332,917,848 364,041,895 Diluted earnings per share (in won) Continuing operation ￦ 3,613 1,741 Discontinued operation 3,574 2,351
Summary of weighted average number of diluted common shares outstanding	2) The adjusted weighted average number of common shares outstanding for the years ended December 31, 2021 and 2020 are calculated as follows: (In shares) 2021 2020 Outstanding shares at January 1 356,635,765 365,682,240 Effect of treasury shares (360,999 ) (1,705,085 ) Effect of Spin-off (23,513,174 ) — Effect of share option 156,256 64,740 Adjusted weighted average number of common shares outstanding 332,917,848 364,041,895

Dividends (Tables)

Dividends (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Details of dividend declared	(1) Details of dividends declared Details of dividend declared for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won, except for face value and share data) Year Dividend type Number of Face value Dividend Dividends 2021 Cash dividends (Interim) 217,616,645 100 1,635 % ￦ 355,804 Cash dividends (Year-end) 217,582,152 100 1,660 % 361,186 ￦ 716,990 2020 Cash dividends (Interim) 73,136,448 500 200 % ￦ 73,136 Cash dividends (Year-end) 71,327,153 500 1,800 % 641,944 ￦ 715,080 2019 Cash dividends (Interim) 71,869,828 500 200 % ￦ 71,870 Cash dividends (Year-end) 73,136,448 500 1,800 % 658,228 ￦ 730,098
Dividends yield ratios	(2) Dividends yield ratio Dividends yield ratios for the years ended December 31, 2021, 2020 and 2019 are as follows: (In won) Year Dividend type Dividend per share Closing price at year-end Dividend yield ratio 2021 Cash dividends 3,295 57,900 5.69% 2020 Cash dividends 10,000 238,000 4.20% 2019 Cash dividends 10,000 238,000 4.20%

Categories of Financial Instr_2

Categories of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Summary of financial assets	(1) Financial assets by category as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Financial Equity Debt Financial Derivatives Total Cash and cash equivalents ￦ 505,578 — — 367,153 — 872,731 Financial instruments 389,368 — — 119,684 — 509,052 Short-term investment securities 5,010 — — — — 5,010 Long-term investment securities(*) 203,473 1,510,428 1,177 — — 1,715,078 Accounts receivable — trade — — — 1,921,617 — 1,921,617 Loans and other receivables 459,959 — — 735,958 — 1,195,917 Derivative financial assets 34,933 — — — 182,661 217,594 ￦ 1,598,321 1,510,428 1,177 3,144,412 182,661 6,436,999 (*) The Group designated ￦ (In millions of won) December 31, 2020 Financial Equity Debt Financial Derivatives Total Cash and cash equivalents(*1) ￦ 539,372 — — 830,281 — 1,369,653 Financial instruments(*1) 1,122,251 — — 305,594 — 1,427,845 Short-term investment securities 150,392 — — — — 150,392 Long-term investment securities(*2) 193,396 1,454,361 1,080 — — 1,648,837 Accounts receivable — trade — — — 2,214,353 — 2,214,353 Loans and other receivables 517,175 — — 1,220,828 — 1,738,003 Derivative financial assets 99,559 — — — 65,136 164,695 ￦ 2,622,145 1,454,361 1,080 4,571,056 65,136 8,713,778 (*1) Some of the financial assets measured at amortized cost were reclassified to financial assets measured at FVTPL. (*2) The Group designated ￦
Summary of financial liabilities	(2) Financial liabilities by category as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Financial Financial Derivatives Total Accounts payable — trade ￦ — 190,559 — 190,559 Derivative financial liabilities 321,025 — 111 321,136 Borrowings — 407,185 — 407,185 Debentures — 8,426,683 — 8,426,683 Lease liabilities(*) — 1,534,282 — 1,534,282 Accounts payable — other and others — 5,524,692 — 5,524,692 ￦ 321,025 16,083,401 111 16,404,537 (In millions of won) December 31, 2020 Financial Financial Derivatives Total Accounts payable — trade ￦ — 372,909 — 372,909 Derivative financial liabilities 333,099 — 42,061 375,160 Borrowings — 2,138,922 — 2,138,922 Debentures — 8,579,743 — 8,579,743 Lease liabilities(*) — 1,436,777 — 1,436,777 Accounts payable — other and others — 6,051,550 — 6,051,550 ￦ 333,099 18,579,901 42,061 18,955,061 (*) Lease liabilities are not applicable on category of financial liabilities, but are classified as financial liabilities measured at amortized cost on consideration of nature for measurement of liabilities.

Financial Risk Management (Tabl

Financial Risk Management (Tables)	12 Months Ended
	Dec. 31, 2021
Statement [LineItems]
Monetary assets and liabilities denominated in foreign currencies	Monetary assets and liabilities denominated in foreign currencies as of December 31, 2021 are as follows: (In millions of won, thousands of foreign currencies) Assets Liabilities Foreign currencies Won Foreign currencies Won USD 52,331 ￦ 62,038 1,527,169 ￦ 1,810,459 EUR 59 80 — — JPY — — 87,837 905 Others — 172 — 145 ￦ 62,290 ￦ 1,811,509
Impact on income before income tax of a hypothetical change in exchange rates	As of December 31, 2021, a hypothetical change in exchange rates by 10% would have increased (decreased) the Group’s income before income tax as follows: (In millions of won) If increased by 10% If decreased by 10% USD ￦ 2,830 (2,830 ) EUR 8 (8 ) JPY (90 ) 90 Others 2 (2 ) ￦ 2,750 (2,750 )
Maximum credit exposure	The maximum credit exposure as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 December 31, 2020 Cash and cash equivalents ￦ 872,550 1,369,423 Financial instruments 509,052 1,427,845 Investment securities 2,077 4,154 Accounts receivable — trade 1,921,617 2,214,353 Contract assets 118,278 148,281 Loans and other receivables 1,195,917 1,738,003 Derivative financial assets 217,594 164,695 ￦ 4,837,085 7,066,754
Summary of gross carrying amounts of each financial asset except for accounts receivable trade and derivative financial asset	The Group’s maximum exposure to credit risk is equal to each financial asset’s carrying amount. The gross carrying amounts of each financial asset except for the accounts receivable — trade and derivative financial assets as of December 31, 2021 are as follows. (In millions of won) Financial assets at Financial At amortized cost 12-month ECL Lifetime ECL — Lifetime ECL — Gross amount ￦ 850,227 1,177 754,918 43,643 149,091 Loss allowance — — (2,787 ) (6,190 ) (83,033 ) Carrying amount ￦ 850,227 1,177 752,131 37,453 66,058
Summary of changes in loss allowance for debt investments	Changes in the loss allowance for the debt investments for the year ended December 31, 2021 are as follows: (In millions of won) 12-month ECL Lifetime ECL — Lifetime ECL — Total December 31, 2020 ￦ 3,751 7,995 88,819 100,565 Remeasurement of loss allowance, net(*) 316 2,885 2,800 6,001 Transfer to lifetime ECL — not credit impaired (306 ) 306 — — Transfer to lifetime ECL — credit impaired (980 ) (2,555 ) 3,535 — Amounts written off — — (16,429 ) (16,429 ) Recovery of amounts written off 6 — 10,495 10,501 Business combination — — 358 358 Spin-off — (2,441 ) (6,545 ) (8,986 ) December 31, 2021 ￦ 2,787 6,190 83,033 92,010 (*) Includes amounts related to discontinued operations.
Contractual maturities of financial liabilities	Contractual maturities of financial liabilities as of December 31, 2021 are as follows: (In millions of won) Carrying Contractual Less than 1 - 5 years More than Accounts payable — trade ￦ 190,559 190,559 190,559 — — Borrowings(*) 407,185 420,503 59,864 360,639 — Debentures(*) 8,426,683 9,479,976 1,603,760 4,987,959 2,888,257 Lease liabilities 1,534,282 1,653,416 359,356 989,603 304,457 Accounts payable — other and others(*) 5,524,692 5,636,104 3,917,356 1,534,636 184,112 ￦ 16,083,401 17,380,558 6,130,895 7,872,837 3,376,826 (*) Includes interest payables.
Periods in which cash flows from cash flow hedge derivatives are expected to occur	As of December 31, 2021, periods in which cash flows from cash flow hedge derivatives are expected to occur are as follows: (In millions of won) Carrying Contractual Less than 1 1 - 5 years More than Assets ￦ 182,661 188,759 27,248 135,409 26,102 Liabilities (111 ) (111 ) (52 ) (59 ) — ￦ 182,550 188,648 27,196 135,350 26,102
Debt-equity ratio	Debt-equity ratio as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, December 31, Total liabilities ￦ 18,576,139 23,510,714 Total equity 12,335,138 24,396,243 Debt-equity ratios 150.60 % 96.37 %
Fair value and carrying amount of financial assets and liabilities including fair value hierarchy	1) Fair value and carrying amount of financial assets and liabilities including fair value hierarchy as of December 31, 2021 are as follows: (In millions of won) December 31, 2021 Carrying Level 1 Level 2 Level 3 Total Financial assets that are measured at fair value: FVTPL ￦ 1,598,321 55,455 1,359,915 182,951 1,598,321 Derivative hedging instruments 182,661 — 182,661 — 182,661 FVOCI 1,511,605 1,344,434 — 167,171 1,511,605 ￦ 3,292,587 1,399,889 1,542,576 350,122 3,292,587 Financial liabilities that are measured at fair value: FVTPL ￦ 321,025 — — 321,025 321,025 Derivative hedging instruments 111 — 111 — 111 ￦ 321,136 — 111 321,025 321,136 Financial liabilities that are not measured at fair value: Borrowings ￦ 407,185 — 392,237 — 392,237 Debentures 8,426,683 — 8,679,472 — 8,679,472 Long-term payables — other 2,009,833 — 2,010,852 — 2,010,852 ￦ 10,843,701 — 11,082,561 — 11,082,561 2) Fair value and carrying amount of financial assets and liabilities including fair value hierarchy as of December 31, 2020 are as follows: (In millions of won) December 31, 2020 Carrying Level 1 Level 2 Level 3 Total Financial assets that are measured at fair value: FVTPL(*) ￦ 2,622,145 60,473 2,291,355 270,317 2,622,145 Derivative hedging instruments 65,136 — 65,136 — 65,136 FVOCI 1,455,441 885,452 — 569,989 1,455,441 ￦ 4,142,722 945,925 2,356,491 840,306 4,142,722 Financial liabilities that are measured at fair value: FVTPL ￦ 333,099 — — 333,099 333,099 Derivative hedging instruments 42,061 — 42,061 — 42,061 ￦ 375,160 — 42,061 333,099 375,160 Financial liabilities that are not measured at fair value: Borrowings ￦ 2,138,923 — 2,282,316 — 2,282,316 Debentures 8,579,743 — 9,085,324 — 9,085,324 Long-term payables — other 1,566,954 — 1,582,805 — 1,582,805 ￦ 12,285,620 — 12,950,445 — 12,950,445 (*) Some of the financial assets measured at amortized cost were reclassified to financial assets measured at FVTPL.
Interest rates used by the group for the fair value measurement	Interest rates used by the Group for the fair value measurement as of December 31, 2021 are as follows: Interest rate Derivative instruments 0.32% ~ 3.90% Borrowings and debentures 1.64% ~ 2.33% Long-term payables — other 1.62% ~ 2.39%
Fair value of assets	(In millions of won) Balance at Gain (loss) OCI Acquisition Disposal Transfer Spin-off Balance at December 31, Financial assets FVTPL ￦ 270,317 21,973 7,318 128,517 (75,238 ) (37,564 ) (132,372 ) 182,951 FVOCI(*2) 569,989 — 38,520 11,019 (24,921 ) (369,185 ) (58,251 ) 167,171 ￦ 840,306 21,973 45,838 139,536 (100,159 ) (406,749 ) (190,623 ) 350,122 Financial liabilities FVTPL ￦ (333,099 ) (8,036 ) — (217,736 ) — — 237,846 (321,025 ) (*1) Includes amounts related to discontinued operations. (*2) The transfer for the year ended December 31, 2021 includes W K-net
Carrying amount of financial instruments recognized of which offset agreements are applicable	Carrying amounts of financial instruments recognized of which offset agreements are applicable as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Gross Amount Net financial Financial assets: Accounts receivable — trade and others ￦ 197,828 (189,424 ) 8,404 Financial liabilities: Accounts payable — other and others ￦ 200,849 (189,424 ) 11,425 (In millions of won) December 31, 2020 Gross Amount Net financial Relevant financial Net Financial assets: Derivative instruments(*) ￦ 8,015 — 8,015 (453 ) 7,562 Accounts receivable — trade and others 317,332 (203,403 ) 113,929 — 113,929 ￦ 325,347 (203,403 ) 121,944 (453 ) 121,491 Financial liabilities: Derivative instruments(*) ￦ 453 — 453 (453 ) — Accounts payable — other and others 301,996 (203,403 ) 98,593 — 98,593 ￦ 302,449 (203,403 ) 99,046 (453 ) 98,593 (*) The balance represents the net amount under the standard terms and conditions of International Swaps and Derivatives Association.

Transactions with Related Par_2

Transactions with Related Parties (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Compensation for the key management	The compensation given to such key management for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Salaries ￦ 5,956 10,029 5,969 Defined benefits plan expenses 2,845 3,459 1,237 Share option 146 158 325 ￦ 13,646 7,531
Transactions with related parties	(3) Transactions with related parties for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 Scope Company Operating Operating Acquisition of Ultimate Controlling Entity SK Inc.(*2) ￦ 33,253 633,868 82,191 Associates F&U Credit information Co., Ltd. 3,828 50,029 — KEB HanaCard Co., Ltd. 17,962 4,374 — SK Wyverns Co., Ltd.(*3) 202 8,203 — Daehan Kanggun BcN Co., Ltd. 10,943 — — SK China Company Ltd.(*4) 131,141 — — Others(*5) 11,778 8,356 — 175,854 70,962 — Others SK Innovation Co., Ltd. 53,445 19,093 — SK Energy Co., Ltd. 18,970 1,250 — SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) 33,435 9 — SK TNS Co., Ltd.(*3) 75 6,868 57,903 SKC Infra Service Co., Ltd.(*3) 26 30,798 8,028 SK Networks Co., Ltd.(*6) 14,439 1,055,512 24 SK Networks Service Co., Ltd. 7,292 73,596 3,520 SK hynix Inc.(*7) 285,104 199 — Happy Narae Co., Ltd. 6,899 20,229 133,625 SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)(*8) 5,793 18,861 20,382 Content Wavve Co., Ltd. 174 78,964 — Eleven Street Co., Ltd. 2,785 5,699 — SK Planet Co., Ltd. 2,048 16,747 6,081 SK hynix Semiconductor (China) Ltd. 48,546 — — SK hynix system ic (Wuxi) Co., Ltd. 20,807 — — SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.) 38,413 — — SK RENT A CAR Co., Ltd. 5,843 18,564 — DREAMUS COMPANY 795 20,074 396 SK m&service Co., Ltd. 764 3,670 888 UbiNS Co., Ltd. 415 42,335 50,847 Others 156,055 30,762 23,428 702,123 1,443,230 305,122 ￦ 911,230 2,148,060 387,313 (*1) Operating expense and others include lease payments by the Group. (*2) Operating expense and others include ￦ (*3) Transactions occurred before the related party relationship terminated. (*4) Operating revenue and others include ￦ (*5) Operating revenue and others include ￦ (*6) Operating expenses and others include costs for handset purchases amounting to ￦ (*7) Operating revenue and others include ￦ (*8) Operating revenue and others include ￦ (In millions of won) 2020 Scope Company Operating Operating Acquisition Ultimate Controlling Entity SK Inc.(*2) ￦ 40,717 596,509 76,534 Associates F&U Credit information Co., Ltd. 3,484 51,228 — SK hynix Inc.(*3) 316,001 267 — KEB HanaCard Co., Ltd. 683 3,065 — SK Wyverns Co., Ltd. 1,279 19,354 — Content Wavve Co., Ltd. 446 56,631 — Others(*4) 65,431 12,511 78 387,324 143,056 78 Others SK Ecoplant Co., Ltd. 12,349 238 — SK Innovation Co., Ltd. 38,999 18,464 — SK Networks Co., Ltd.(*5) 13,893 1,022,976 32 SK Networks Services Co., Ltd. 6,936 76,653 2,023 SK Telesys Co., Ltd. 388 10,751 30,453 SK TNS Co., Ltd. 1,118 43,767 496,460 SK Energy Co., Ltd. 16,009 296 — SK hynix Semiconductor (China) Ltd. 73,683 — — SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.) 19,394 — — SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) 20,667 9 — SK Global Chemical International Trading (Shanghai) Co., Ltd. 15,898 8 — HappyNarae Co., Ltd. 9,871 17,361 129,621 Others 102,141 128,268 83,693 331,346 1,318,791 742,282 ￦ 759,387 2,058,356 818,894 (*1) Operating expense and others include lease payments by the Group. (*2) Operating expense and others include ￦ (*3) Operating revenue and others include ￦ ￦ (*4) Operating revenue and others include ￦ (*5) Operating expenses and others include costs for handset purchases amounting to ￦ (In millions of won) 2019 Scope Company Operating Operating Acquisition Ultimate Controlling Entity SK Inc.(*2) ￦ 53,507 612,248 95,426 Associates F&U Credit information Co., Ltd. 2,293 55,179 — SK hynix Inc.(*3) 273,047 481 — KEB HanaCard Co., Ltd. 832 1,901 — SK Wyverns Co., Ltd. 1,399 21,528 — Others(*4) 17,286 13,864 457 294,857 92,953 457 Others SK Ecoplant Co., Ltd. 13,339 1,601 7,400 SK Innovation Co., Ltd. 26,697 2,777 — SK Networks Co., Ltd.(*5) 29,321 1,088,443 449 SK Networks Services Co., Ltd. 1,056 76,671 4,979 SK Telesys Co., Ltd. 474 9,686 59,392 SK TNS Co., Ltd. 240 35,824 607,546 SK Energy Co., Ltd. 16,294 516 — SK hynix Semiconductor (China) Ltd. 73,542 — — SK Global Chemical International Trading (Shanghai) Co., Ltd. 14,535 131 — HappyNarae Co., Ltd. 6,943 18,121 168,286 Others 90,307 105,569 109,189 272,748 1,339,339 957,241 ￦ 621,112 2,044,540 1,053,124 (*1) Operating expense and others include lease payments by the Group. (*2) Operating expense and others include ￦ (*3) Operating revenue and others include ￦ (*4) Operating revenue and others include ￦ KIF-Stonebridge (*5) Operating expenses and others include costs for handset purchases amounting to ￦
Account balances with related parties	(4) Account balances with related parties as of December 31, 2021 and 2020 are as follows: (In millions of won) December 31, 2021 Receivables Payables Scope Company Loans Accounts Accounts Ultimate Controlling Entity SK Inc. ￦ — 2,092 69,652 Associates F&U Credit information Co., Ltd. — 4 5,265 Wave City Development Co., Ltd.(*1) — 2,623 — Daehan Kanggun BcN Co., Ltd.(*2) 22,147 3,857 — KEB HanaCard Co., Ltd. — 529 48,020 Others — 84 1,197 22,147 7,097 54,482 Others SK Innovation Co., Ltd. — 3,022 38,022 SK Networks Co., Ltd. — 241 198,631 Mintit Co., Ltd. — 17,929 131 SK hynix Inc. — 11,526 166 Happy Narae Co., Ltd. — 6 49,349 SK m&service Co., Ltd. — 1,453 18,921 SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) — 2,649 24,593 Content Wavve Co., Ltd. — 183 9,873 Incross Co., Ltd. — 3,610 11,829 Eleven Street Co., Ltd. — 2,851 7,782 SK Planet Co., Ltd. — 668 31,652 SK RENT A CAR Co., Ltd. — 116 16,715 UbiNS Co., Ltd. — 24 14,932 Others — 8,307 29,106 — 52,585 451,702 ￦ 22,147 61,774 575,836 (*1) As of December 31, 2021, the Parent Company recognized loss allowance amounting to ￦ (*2) As of December 31, 2021, the Parent Company recognized full loss allowance for the balance of loans to Daehan Kanggun BcN Co., Ltd. (In millions of won) December 31, 2020 Receivables Payables Scope Company Loans Accounts Accounts Ultimate Controlling Entity SK Inc. ￦ — 6,449 64,373 Associates F&U Credit information Co., Ltd. — 10 4,699 SK hynix Inc. — 33,773 128 Wave City Development Co., Ltd.(*1) — 25,782 — Daehan Kanggun BcN Co., Ltd.(*2) 22,147 2,779 — KEB HanaCard Co., Ltd. — 352 145,328 Content Wavve Co., Ltd. — 283 2,491 Others — 9,098 1,686 22,147 72,077 154,332 Others SK Ecoplant Co., Ltd. (Formerly, SK Engineering & Construction Co., Ltd.) — 1,521 152 SK Innovation Co., Ltd. — 11,737 44,105 SK Networks. Co., Ltd. — 2,245 108,233 SK Networks Services Co., Ltd. — 579 7,103 SK Telesys Co., Ltd. — 37 9,253 SK TNS Co., Ltd. — 263 89,915 SK Energy Co., Ltd. — 3,502 1,837 SK hystec Co., Ltd. — 494 6,085 SK hynix Semiconductor (China) Ltd. — 5,896 — SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.) — 2,075 — SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) — 1,142 5 SK Global Chemical International — 795 21 HappyNarae Co., Ltd. — 720 16,534 Others — 15,564 120,575 — 46,570 403,818 ￦ 22,147 125,096 622,523 (*1) As of December 31, 2020, the Parent Company recognized loss allowance amounting to ￦ (*2) As of December 31, 2020, the Parent Company recognized full loss allowance for the balance of loans to Daehan Kanggun BcN Co., Ltd. (5) The Group has granted SK REIT Co., Ltd. the right of first offer regarding the disposal of real estate owned by the Group. Whereby, the negotiation period is within 3 to 5 years from June 30, 2021, date of agreement, and the Group has been granted the right by SK REIT Co., Ltd. to lease the real estate in preference to a third party if SK REIT Co., Ltd. purchases the real estate from the Group. (6) The details of additional investments and disposal of associates and joint ventures for the year ended December 31, 2021 as presented in note 12.

Statements of Cash Flows (Table

Statements of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Adjustments for income and expenses from operating activities	(1) Adjustments for income and expenses from operating activities for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Interest income ￦ (43,850) (50,357) (63,579) Dividends (14,132) (1,170) (10,011) Gain on foreign currency translations (10,753) (8,928) (4,576) Gain on sale of accounts receivable — other (27,725) (22,605) (15,855) Gain relating to investments in associates and joint ventures, net (1,948,447) (1,028,403) (449,543) Gain on disposal of property and equipment and intangible assets (40,109) (35,644) (8,533) Gain on business transfer (82,248) (12,455) (69,522) Gain relating to financial instruments at FVTPL (91,244) (145,016) (36,336) Other income (10,369) (4,220) (1,875) Interest expense 342,342 399,176 406,087 Loss on foreign currency translations 8,005 12,730 4,948 Loss on disposal of long-term investment securities — 98 — Loss on sale of accounts receivable — other — — 5,823 Income tax expense 651,948 376,502 300,268 Expense related to defined benefit plan 190,462 198,794 175,165 Share option 91,646 4,313 2,073 Bonus paid by treasury shares 29,643 — — Depreciation and amortization 4,114,394 4,169,996 4,021,016 Bad debt for accounts receivables — trade 31,546 48,625 28,841 Loss on disposal of property and equipment and intangible assets 47,369 41,598 47,760 Impairment loss on property and equipment and intangible assets 3,135 208,833 65,935 Bad debt for accounts receivable — other 6,001 10,559 5,802 Loss on impairment of investment assets — — 1,670 Loss relating to financial instruments at FVTPL 76,142 27,082 8,437 Other financial fees 142,015 44,734 — Other expenses 8,008 22,412 21,044 ￦ 3,473,779 4,256,654 4,435,039
Changes in assets and liabilities from operating activities	(2) Changes in assets and liabilities from operating activities for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Accounts receivable — trade ￦ (95,374 ) (33,410 ) (211,712 ) Accounts receivable — other (152,038 ) (50,003 ) 48,399 Accrued income — — 151 Advanced payments (43,212 ) (945 ) (12,204 ) Prepaid expenses 77,404 112,270 (680,925 ) Inventories (70,601 ) (7,219 ) 115,893 Long-term accounts receivable — other 83,658 26,027 (56,216 ) Contract assets (11,582 ) 1,528 (68,805 ) Guarantee deposits 8,125 26,122 6,392 Accounts payable — trade 12,312 3,023 (23,607 ) Accounts payable — other (109,476 ) 311,737 167,595 Withholdings (55,925 ) 33,348 (31,545 ) Contract liabilities (2,158 ) 35,426 33,574 Deposits received (3,737 ) (1,028 ) (3,112 ) Accrued expenses 7,505 61,848 116,949 Provisions (19,324 ) (30,773 ) (36,478 ) Long-term provisions (260 ) (548 ) (1,699 ) Plan assets (51,697 ) (145,214 ) (130,790 ) Retirement benefit payment (114,897 ) (76,987 ) (84,098 ) Others (27,418 ) 37,256 (3,892 ) ￦ (568,695 ) 302,458 (856,130 )
Significant non-cash transactions	(3) Significant non-cash (In millions of won) 2021 2020 2019 Increase (decrease) in accounts payable — other relating to the ￦ 1,063,800 (426,723 ) 438,622 Increase of right-of-use 672,723 736,157 1,141,349 Merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd. — 1,072,487 — Change in assets and liabilities by spin-off 14,379,397 — — Retirement of treasury shares 1,965,952 — — Disposal of treasury shares (Congratulatory bonus for spin-off) 114,373 — —
Reconciliation of Lliabilities Arising from Financing Activities	(4) Reconciliation of liabilities arising from financing activities for the years ended December 31, 2021 and 20 2 (In millions of won) 2021 Non-cash January 1, 2021 Cash flows Exchange Fair value Business Spin-off Other December 31, Total liabilities from financing activities: Short-term borrowings ￦ 109,998 (50,823 ) — — 1,825 (48,510 ) 508 12,998 Long-term borrowings 2,028,924 63,132 600 — 662 (1,703,300 ) 4,169 394,187 Debentures 8,579,743 (16,755 ) 145,584 — — (295,544 ) 13,655 8,426,683 Lease liabilities 1,436,777 (431,674 ) — — 497 (85,322 ) 614,003 1,534,281 Long-term payables — other 1,566,954 (426,267 ) — — — — 869,146 2,009,833 Derivative financial liabilities 54,176 332 — (42,282 ) — (12,115 ) — 111 Derivative financial assets (65,136 ) — — (117,525 ) — — — (182,661 ) Financial liabilities at FVTPL — 129,123 — 7,996 — (137,119 ) — — ￦ 13,711,436 (732,932 ) 146,184 (151,811 ) 2,984 (2,281,910 ) 1,501,481 12,195,432 Other cash flows from financing activities: Payments of cash dividends ￦ (1,028,520 ) Payments of interest on hybrid bonds (14,766 ) Acquisition of treasury shares (76,111 ) Cash inflow from transactions with the non-controlling 444,124 Cash outflow from transactions with the non-controlling (19,406 ) Cash outflow from spin-off (626,000 ) (1,320,679 ) ￦ (2,053,611 ) (*) The effect of changes in foreign exchange rates for financial liabilities at amortized cost. (In millions of won) 2020 January 1, Cash flows Non-cash Exchange Fair value Business combinations Other December 31, Total liabilities from financing activities: Short-term borrowings ￦ 20,603 76,375 13,020 — — — 109,998 Long-term borrowings 2,022,537 (3,026 ) (14,208 ) — — 23,621 2,028,924 Debentures 8,220,833 445,462 (94,391 ) — — 7,839 8,579,743 Lease liabilities 1,291,007 (412,666 ) — — 7,696 550,740 1,436,777 Long-term payables — other 1,971,609 (428,100 ) — — — 23,445 1,566,954 Derivative financial liabilities 1,043 8,191 — 44,942 — — 54,176 Derivative financial assets (144,886 ) 28,500 — 51,250 — — (65,136 ) ￦ 13,382,746 (285,264 ) (95,579 ) 96,192 7,696 605,645 13,711,436 Other cash flows from financing activities: Payments of cash dividends ￦ (742,136) Payments of interest on hybrid bonds (14,766 ) Acquisition of treasury shares (426,664 ) Cash inflow from transactions with the non-controlling 17,766 Cash outflow from transactions with the non-controlling (6,515 ) (1,172,315 ) ￦ (1,457,579 ) (*) The effect of changes in foreign exchange rates for financial liabilities at amortized cost.

Emissions Liabilities - (Tables

Emissions Liabilities - (Tables)	12 Months Ended
	Dec. 31, 2021
Disclosure of quantity of emissions rights allocated free of charge [Abstract]
Disclosure of Quantity of Emissions Rights Allocated Free of Charge	(1) The quantity of emissions rights allocated free of charge for each implementation year as of December 31, 2021 are as follows: (In tCO2-eQ) Quantities allocated in 2019 Quantities Quantities Total Emissions rights allocated free of charge 815,927 814,842 1,033,764 2,664,533
Disclosure of Changes in Emissions Rights Quantities	(2) Changes in emissions rights quantities the Parent Company held are as follows: (In tCO2-eQ) Quantities allocated in Quantities Quantities Total January 1 (2,343 ) (60,977 ) — (63,320 ) Allocation at no cost 815,927 814,842 1,033,764 2,664,533 Additional allocation 131,015 217,643 — 348,658 Purchase — 68,471 — 68,471 Surrender or shall be surrendered (1,005,576 ) (1,039,979 ) (1,087,455 ) (3,133,010 ) Borrowing 60,977 — — 60,977 December 31 — — (53,691 ) (53,691 ) (3) As of December 31, 2021, the estimated annual greenhouse gas emissions quantities of the Parent Company are 1,087,455 tCO2-eQ.

Non-current Assets Held for S_2

Non-current Assets Held for Sale - (Table)	12 Months Ended
	Dec. 31, 2021
Disclosure of Noncurrent Assets Held for Sale [Abstract]
Disclosure of Non-current Assets Held for Sale	(In millions of won) December 31, 2021 Investments in associates Carrot General Insurance Co., Ltd. ￦ 8,734

Spin-Off (Tables)

Spin-Off (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of profit or loss with cash flow and financial statement from discontinued operations	The details of profit or loss from discontinued operations for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Operating revenue and other operating income ￦ 2,469,329 2,541,133 2,331,433 Revenue 2,383,083 2,536,904 2,324,285 Other income 86,246 4,229 7,148 Operating expenses: 2,396,324 2,471,519 2,311,229 Labor 824,505 897,676 840,809 Commission 349,344 244,074 235,384 Depreciation and amortization 287,412 326,417 315,678 Network interconnection 863 762 1,099 Advertising 158,512 159,589 154,715 Rent 2,754 2,115 2,254 Cost of goods sold 426,161 502,469 455,257 Others 346,773 338,417 306,033 Operating profit 73,005 69,614 20,204 Finance income 47,417 100,511 20,464 Finance costs 269,823 174,250 103,044 Gain relating to investments in subsidiaries, associates and joint ventures, 1,502,147 975,947 416,344 Profit before income tax 1,352,746 971,822 353,968 Income tax expense 205,152 155,240 37,328 Profit for the year ￦ 1,147,594 816,582 316,640 2) Statements of Cash Flows The details of cash flows from discontinued operations for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Cash flows from operating activities ￦ 59,255 495,696 196,518 Cash flows from investing activities (967,053 ) (483,599 ) (189,064 ) Cash flows from investing activities (88,872 ) (22,902 ) (35,395 ) (3) Subsequent to the spin-off, the Parent Company lost control over the related businesses. The spin-off was accounted for by derecognizing all related assets and liabilities. The net assets of the spin-off business as of spin-off date was recognized in Capital surplus and others. The details of assets and liabilities derecognized from the financial statements due to the spin-off (In millions of won) Amount Current assets ￦ 2,608,601 Non-current 19,269,615 Total assets ￦ 21,878,216 Current liabilities ￦ 2,161,458 Non-current 4,676,324 Total liabilities ￦ 6,837,782 Net assets ￦ 15,040,434 (4) The Parent Company has obligation to jointly and severally reimburse the Parent Company’s liabilities incurred prior to the spin-off spin-off 530-9

Cash Dividends paid to the Pa_2

Cash Dividends paid to the Parent Company (Tables)	12 Months Ended
	Dec. 31, 2021
Text block [abstract]
Summary of Cash Dividends Received from Consolidated Subsidiaries and Associates	Cash dividends paid to the Parent Company for the years ended December 31, 2021, 2020 and 2019 are as follows: (In millions of won) 2021 2020 2019 Cash dividends received from consolidated subsidiaries ￦ 12,646 119,036 287,549 Cash dividends received from associates 312,793 164,850 227,500 ￦ 325,439 283,886 515,049

Subsequent Events (Tables)

Subsequent Events (Tables)	12 Months Ended
	Dec. 31, 2021
Disclosure of Disposal of Treasury Shares [Abstract]
Disclosure of Disposal of Treasury Shares Explanatory	On January 20, 2022, the Board of Directors of the Parent Company approved the disposal of treasury shares. The disposal of treasury shares has been completed and the details are as follows: Information of disposal Number of treasury shares to be disposed 413,080 Common shares Price of the treasury shares to be disposed per share (in won) ￦ Aggregate disposal value ￦ Disposal date January 24, 2022 Purpose of disposal Allotment of shares as bonus payment Method of disposal Over-the-counter

Reporting Entity - Total Issued

Reporting Entity - Total Issued Shares Held by Shareholders (Detail) - shares	Dec. 31, 2021	Dec. 31, 2020
Disclosure of classes of share capital [line items]
Number of shares	218,833,144	80,745,711
Percentage of total shares issued (%)	100.00%	100.00%
SK Inc. [member]
Disclosure of classes of share capital [line items]
Number of shares	65,668,397	21,624,120
Percentage of total shares issued (%)	30.00%	26.78%
National pension service [member]
Disclosure of classes of share capital [line items]
Number of shares	21,076,493	8,853,906
Percentage of total shares issued (%)	9.63%	10.97%
Institutional investors and other minority shareholders [member]
Disclosure of classes of share capital [line items]
Number of shares	126,990,775	39,582,507
Percentage of total shares issued (%)	58.04%	49.02%
Kakao Corp. [member]
Disclosure of classes of share capital [line items]
Number of shares	3,846,487	1,266,620
Percentage of total shares issued (%)	1.76%	1.57%
Treasury shares [member]
Disclosure of classes of share capital [line items]
Number of shares	1,250,992	9,418,558
Percentage of total shares issued (%)	0.57%	11.66%

Reporting Entity - List of Subs

Reporting Entity - List of Subsidiaries (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SK Telink Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Telink Co., Ltd.
Location	Korea
Primary business	Telecommunication and Mobile Virtual Network Operator service
Ownership	100.00%	100.00%
SK Communications Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Communications Co., Ltd.
Location	Korea
Primary business	Internet website services
Ownership	100.00%	100.00%
SK Broadband Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Broadband Co., Ltd.
Location	Korea
Primary business	Telecommunication services
Ownership	74.30%	74.30%
PS&Marketing Corporation [member]
Disclosure of subsidiaries [line items]
Subsidiary	PS&Marketing Corporation
Location	Korea
Primary business	Communications device retail business
Ownership	100.00%	100.00%
SERVICE ACE Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SERVICE ACE Co., Ltd.
Location	Korea
Primary business	Call center management service
Ownership	100.00%	100.00%
SERVICE TOP Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SERVICE TOP Co., Ltd.
Location	Korea
Primary business	Call center management service
Ownership	100.00%	100.00%
SK O&S Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK O&S Co., Ltd.
Location	Korea
Primary business	Base station maintenance service
Ownership	100.00%	100.00%
SK Telecom China Holdings Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Telecom China Holdings Co., Ltd.
Location	China
Primary business	Investment (Holdings company)
Ownership	100.00%	100.00%
SK Global Healthcare Business Group, Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Global Healthcare Business Group Ltd.
Location	Hong Kong
Primary business	Investment
Ownership	100.00%	100.00%
YTK Investment Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	YTK Investment Ltd.
Location	Cayman Islands
Primary business	Investment association
Ownership	100.00%	100.00%
Atlas investment [member]
Disclosure of subsidiaries [line items]
Subsidiary	Atlas Investment
Location	Cayman Islands
Primary business	Investment association
Ownership	100.00%	100.00%
SKT Americas, Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SKT Americas, Inc.
Location	USA
Primary business	Information gathering and consulting
Ownership	100.00%	100.00%
One Store Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	One Store Co., Ltd.
Location	Korea
Primary business	Telecommunication services
Ownership		52.10%
SK Planet Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Planet Co., Ltd.
Location	Korea
Primary business	Telecommunication services, system software development and supply services
Ownership		98.70%
Eleven Street Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Eleven Street Co., Ltd.
Location	Korea
Primary business	E-commerce
Ownership		80.30%
DREAMUS COMPANY [member]
Disclosure of subsidiaries [line items]
Subsidiary	DREAMUS COMPANY
Location	Korea
Primary business	Manufacturing digital audio players and other portable media devices
Ownership		51.40%
SK Shieldus Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.)
Location	Korea
Primary business	Information security and unmanned security service
Ownership		62.60%
Quantum Innovation Fund I [member]
Disclosure of subsidiaries [line items]
Subsidiary	Quantum Innovation Fund I
Location	Korea
Primary business	Investment
Ownership	59.90%	59.90%
SK Telecom Japan Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Telecom Japan Inc.
Location	Japan
Primary business	Information gathering and consulting
Ownership	100.00%	100.00%
Id Quantique SA [member]
Disclosure of subsidiaries [line items]
Subsidiary	id Quantique SA
Location	Switzerland
Primary business	Quantum information and communications service
Ownership		68.10%
SK Square Americas, Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Square Americas, Inc. (Formerly, SK Telecom TMT InvestmentCorp.)
Location	USA
Primary business	Investment
Ownership		100.00%
FSK L&S CO., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	FSK L&S Co., Ltd.
Location	Korea
Primary business	Freight and logistics consulting business
Ownership		60.00%
Incross Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Incross Co., Ltd.
Location	Korea
Primary business	Media representative business
Ownership		34.60%
Happy Hanool Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Happy Hanool Co., Ltd.
Location	Korea
Primary business	Service
Ownership	100.00%	100.00%
SK stoa Co., Ltd [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK stoa Co., Ltd.
Location	Korea
Primary business	Other telecommunication retail business
Ownership	100.00%	100.00%
Broadband Nowon Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Broadband Nowon Co., Ltd.
Location	Korea
Primary business	Cable broadcasting services
Ownership	100.00%	55.00%
T map Mobility Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	T map Mobility Co., Ltd.
Location	Korea
Primary business	Mobility business
Ownership		100.00%
SK m&service Co., Ltd [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK m&service Co., Ltd.
Location	Korea
Primary business	Database and Internet website service
Ownership		100.00%
SK Planet Global Holdings Pte. Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Planet Global Holdings Pte. Ltd.
Location	Singapore
Primary business	Investment (Holdings company)
Ownership		100.00%
SKP America LLC. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SKP America LLC.
Location	USA
Primary business	Digital contents sourcing service
Ownership		100.00%
K-net culture and contents venture fund [member]
Disclosure of subsidiaries [line items]
Subsidiary	K-net Culture and Contents Venture Fund
Location	Korea
Primary business	Capital investing in startups
Ownership		59.00%
iriver Enterprise Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	iriver Enterprise Ltd.
Location	Hong Kong
Primary business	Management of Chinese subsidiaries
Ownership		100.00%
iriver China Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	iriver China Co., Ltd.
Location	China
Primary business	Sales and manufacturing of MP3 and 4
Ownership		100.00%
Dongguan iriver Electronics Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Dongguan iriver Electronics Co., Ltd.
Location	China
Primary business	Sales and manufacturing of e-book devices
Ownership		100.00%
LIFE DESIGN COMPANY Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	LIFE DESIGN COMPANY Inc.
Location	Japan
Primary business	Sales of goods in Japan
Ownership		100.00%
Kinfosec Information Technology (Wuxi) Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SKinfosec Information Technology(Wuxi) Co., Ltd.
Location	China
Primary business	System software development and supply services
Ownership		100.00%
ADT CAPS Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	ADT CAPS Co., Ltd.
Location	Korea
Primary business	Unmanned security
Ownership		100.00%
CAPSTEC Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	CAPSTEC Co., Ltd.
Location	Korea
Primary business	Manned security
Ownership		100.00%
Home & Service Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Home & Service Co., Ltd.
Location	Korea
Primary business	Operation of information and communication facility
Ownership	100.00%	100.00%
Media S Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Media S Co., Ltd.
Location	Korea
Primary business	Production and supply services of broadcasting programs
Ownership	100.00%
Pan Asia Semiconductor Materials LLC [member]
Disclosure of subsidiaries [line items]
Subsidiary	PanAsia Semiconductor Materials LLC.
Location	Korea
Primary business	Investment
Ownership	66.40%	66.40%
SK Planet Japan, K. K. [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Planet Japan, K. K.
Location	Japan
Primary business	Digital contents sourcing service
Ownership	79.80%	79.80%
Id Quantique LLC [member]
Disclosure of subsidiaries [line items]
Subsidiary	Id Quantique LLC
Location	Korea
Primary business	Quantum information and communications service
Ownership		100.00%
FSK L&S (Shanghai) Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	FSK L&S (Shanghai) Co., Ltd.
Location	China
Primary business	Logistics business
Ownership		66.00%
FSK L&S (Hungary) Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	FSK L&S (Hungary) Co., Ltd.
Location	Hungary
Primary business	Logistics business
Ownership		100.00%
FSK L&S VIETNAM COMPANY LIMITED [member]
Disclosure of subsidiaries [line items]
Subsidiary	FSK L&S VIETNAM COMPANY LIMITED
Location	Vietnam
Primary business	Logistics business
Ownership		100.00%
Infra Communications Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Infra Communications Co., Ltd.
Location	Korea
Primary business	Service operation
Ownership		100.00%
Mindknock Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Mindknock Co., Ltd.
Location	Korea
Primary business	Software development
Ownership		100.00%
SK Telecom Innovation Fund, L.P. (formerly, Technology Innovation Partners, L.P.) [member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Telecom Innovation Fund, L.P.
Location	USA
Primary business	Investment
Ownership	100.00%	100.00%
SK Telecom China Fund I L.P. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	SK Telecom China Fund I L.P.
Location	Cayman Islands
Primary business	Investment
Ownership	100.00%	100.00%

Reporting Entity - List of Su_2

Reporting Entity - List of Subsidiaries (Parenthetical) (Detail) - Broadband Nowon Co., Ltd. [member] د.ك in Millions	12 Months Ended
	Dec. 31, 2021KWD (د.ك)shares
Disclosure of subsidiaries [line items]
Number of shares acquired | shares	513,000
Percentage of shares owned	45.00%
Cash flows used in obtaining control of subsidiaries or other business classified as investing activities | د.ك	د.ك 9,512

Reporting Entity - Condensed Fi

Reporting Entity - Condensed Financial Information of the Significant Subsidiaries (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [line items]
Total Assets	₩ 30,911,277	₩ 47,906,957
Total Liabilities	18,576,139	23,510,714
Total equity	12,335,138	24,396,243	₩ 22,816,934	₩ 22,349,250
Revenue	16,864,348	16,183,498	15,512,014
Profit (loss)	2,418,989	1,500,538	860,733
SK Telink Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets	174,837	176,872	265,725
Total Liabilities	52,821	60,702	77,378
Total equity	122,016	116,170	188,347
Revenue	313,404	351,334	363,627
Profit (loss)	8,846	18,010	3,010
Eleven Street Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets		999,225	923,424
Total Liabilities		542,534	446,432
Total equity		456,691	476,992
Revenue		545,556	530,489
Profit (loss)		(29,623)	(5,077)
SK m&service Co., Ltd [member]
Disclosure of subsidiaries [line items]
Total Assets		129,738	109,699
Total Liabilities		74,962	58,605
Total equity		54,776	51,094
Revenue		214,949	218,848
Profit (loss)		2,759	2,448
SK Broadband Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets	5,971,505	5,765,808	4,565,732
Total Liabilities	3,091,837	3,119,489	2,930,482
Total equity	2,879,668	2,646,319	1,635,250
Revenue	4,058,997	3,713,021	3,170,691
Profit (loss)	213,468	150,694	47,701
K-net culture and contents venture fund [member]
Disclosure of subsidiaries [line items]
Total Assets		377,683	151,493
Total Liabilities		65,896	21,163
Total equity		311,787	130,330
Profit (loss)		(44,737)	(294)
PS&Marketing Corporation [member]
Disclosure of subsidiaries [line items]
Total Assets	478,745	470,521	439,947
Total Liabilities	263,457	257,809	225,942
Total equity	215,288	212,712	214,005
Revenue	1,445,540	1,427,218	1,684,576
Profit (loss)	3,179	(847)	96
SERVICE ACE Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets	99,059	96,258	80,844
Total Liabilities	66,496	71,890	55,133
Total equity	32,563	24,368	25,711
Revenue	197,146	206,612	206,080
Profit (loss)	2,519	2,905	3,906
SERVICE TOP Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets	72,026	69,496	66,932
Total Liabilities	46,067	51,584	50,060
Total equity	25,959	17,912	16,872
Revenue	185,452	195,479	193,377
Profit (loss)	2,066	2,592	2,230
SK O&S Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets	95,748	88,663	96,446
Total Liabilities	58,870	54,012	62,086
Total equity	36,878	34,651	34,360
Revenue	285,591	278,948	281,634
Profit (loss)	69	778	1,724
SK Planet Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets		536,981	595,838
Total Liabilities		214,846	278,438
Total equity		322,135	317,400
Revenue		276,462	275,544
Profit (loss)		1,305	1,214
DREAMUS COMPANY [member]
Disclosure of subsidiaries [line items]
Total Assets		172,443	171,586
Total Liabilities		76,642	53,669
Total equity		95,801	117,917
Revenue		226,329	196,961
Profit (loss)		(23,068)	(48,006)
SK Shieldus Co Ltd [Member]
Disclosure of subsidiaries [line items]
Total Assets		2,927,396
Total Liabilities		2,550,936
Total equity		376,460
Revenue		1,327,150
Profit (loss)		14,227
Life and Security Holdings Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets			2,639,781
Total Liabilities			2,330,920
Total equity			308,861
Revenue		1,327,150	913,301
Profit (loss)		14,227	12,703
SK Infosec Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets			158,424
Total Liabilities			61,644
Total equity			96,780
Revenue			270,423
Profit (loss)			18,520
One Store Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets		243,442	236,329
Total Liabilities		99,943	93,625
Total equity		143,499	142,704
Revenue		155,218	135,116
Profit (loss)		1,952	(5,415)
Home & Service Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets	131,947	124,197	121,202
Total Liabilities	90,775	88,740	84,378
Total equity	41,172	35,457	36,824
Revenue	405,255	397,754	351,154
Profit (loss)	550	(20)	(427)
SK stoa Co., Ltd [member]
Disclosure of subsidiaries [line items]
Total Assets	107,943	107,982	70,754
Total Liabilities	59,931	79,339	59,207
Total equity	48,012	28,643	11,547
Revenue	316,249	268,693	196,063
Profit (loss)	₩ 19,163	17,154	875
FSK L&S CO., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets		66,117	47,550
Total Liabilities		35,192	19,651
Total equity		30,925	27,899
Revenue		205,623	130,872
Profit (loss)		3,022	306
Incross Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Total Assets		179,308	144,263
Total Liabilities		104,778	78,519
Total equity		74,530	65,744
Revenue		39,440	19,787
Profit (loss)		12,307	₩ 5,756
Tmap Mobility Co Ltd [Member]
Disclosure of subsidiaries [line items]
Total Assets		170,381
Total Liabilities		17,179
Total equity		153,202
Revenue		0
Profit (loss)		₩ (1,857)

Reporting Entity - Information

Reporting Entity - Information of Significant Non-controlling Interests of the Group (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of subsidiaries [line items]
Current assets	₩ 6,352,665	₩ 8,775,086
Non-current assets	24,558,612	39,131,871
Current liabilities	(6,960,435)	(8,177,967)
Non-current liabilities	(11,615,704)	(15,332,747)
Carrying amount of non-controlling interests	755,792	652,349
Revenue	16,864,348	16,183,498	₩ 15,512,014
Profit (loss) for the year	2,418,989	1,500,538	860,733
Total comprehensive income (loss)	3,781,181	1,962,360	861,742
Profit (loss) attributable to non-controlling interests	11,466	(3,814)	(27,965)
Net cash provided by (used in) operating activities	5,031,279	5,821,876	4,034,984
Net cash provided by (used in) investing activities	(3,486,189)	(4,250,402)	(3,581,584)
Net cash provided by (used in) financing activities	(2,053,611)	(1,457,579)	(686,674)
Effects on exchange rate changes on cash and cash equivalents	₩ 11,599	₩ (15,066)	₩ (2,601)
DREAMUS COMPANY [member]
Disclosure of subsidiaries [line items]
Ownership of non-controlling interests (%)		48.60%	48.60%
Current assets		₩ 146,278	₩ 136,269
Non-current assets		26,165	35,317
Current liabilities		(72,762)	(49,776)
Non-current liabilities		(3,880)	(3,893)
Net assets		95,801	117,917
Net assets on the consolidated financial statements		95,801	117,917
Carrying amount of non-controlling interests		47,452	57,175
Revenue		226,329	196,961
Profit (loss) for the year		(23,068)	(48,006)
Profit (loss) for the year on the consolidated financial statements		(23,068)	(48,006)
Total comprehensive income (loss)		(22,740)	(47,971)
Profit (loss) attributable to non-controlling interests		(10,770)	(23,281)
Net cash provided by (used in) operating activities		15,223	(1,387)
Net cash provided by (used in) investing activities		(2,471)	(2,596)
Net cash provided by (used in) financing activities		(2,329)	(2,965)
Effects on exchange rate changes on cash and cash equivalents		(2,053)	197
Net increase(decrease) in cash and cash equivalents		₩ 8,370	₩ (6,751)
One Store Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Ownership of non-controlling interests (%)		47.40%	47.30%
Current assets		₩ 215,672	₩ 208,527
Non-current assets		27,770	27,802
Current liabilities		(96,139)	(88,842)
Non-current liabilities		(3,804)	(4,783)
Net assets		143,499	142,704
Net assets on the consolidated financial statements		143,499	142,704
Carrying amount of non-controlling interests		68,573	67,742
Revenue		155,218	135,116
Profit (loss) for the year		1,952	(5,415)
Profit (loss) for the year on the consolidated financial statements		1,952	(5,415)
Total comprehensive income (loss)		2,278	(5,856)
Profit (loss) attributable to non-controlling interests		930	(2,256)
Net cash provided by (used in) operating activities		38,006	14,426
Net cash provided by (used in) investing activities		(62,816)	(87,275)
Net cash provided by (used in) financing activities		(2,499)	96,189
Effects on exchange rate changes on cash and cash equivalents			2
Net increase(decrease) in cash and cash equivalents		₩ (27,309)	₩ 23,342
Eleven Street Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Ownership of non-controlling interests (%)		18.20%	18.20%
Current assets		₩ 896,828	₩ 779,568
Non-current assets		102,397	143,856
Current liabilities		(508,427)	(420,022)
Non-current liabilities		(34,107)	(26,410)
Net assets		456,691	476,992
Fair value adjustment and others		(14,297)	(18,805)
Net assets on the consolidated financial statements		442,394	458,187
Carrying amount of non-controlling interests		81,754	84,673
Revenue		545,556	530,489
Profit (loss) for the year		(29,623)	(5,077)
Depreciation of the fair value adjustment and others		(492)	(614)
Profit (loss) for the year on the consolidated financial statements		(30,115)	(5,691)
Total comprehensive income (loss)		(15,793)	(13,590)
Profit (loss) attributable to non-controlling interests		(5,565)	(1,064)
Net cash provided by (used in) operating activities		65,499	7,980
Net cash provided by (used in) investing activities		(71,644)	102,366
Net cash provided by (used in) financing activities		(18,059)	(72,686)
Effects on exchange rate changes on cash and cash equivalents		(385)	35
Net increase(decrease) in cash and cash equivalents		(24,589)	37,695
Dividends paid to non-controlling interests		₩ 5,000	₩ 17,500
Life and Security Holdings Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Ownership of non-controlling interests (%)		37.40%	45.00%
Current assets		₩ 306,520	₩ 126,437
Non-current assets		2,620,876	2,513,344
Current liabilities		(417,194)	(279,403)
Non-current liabilities		(2,133,742)	(2,051,517)
Net assets		376,460	308,861
Fair value adjustment and others		(1,227,442)	(1,219,701)
Net assets on the consolidated financial statements		(850,982)	(910,840)
Carrying amount of non-controlling interests		(318,267)	(409,878)
Revenue		1,327,150	913,301
Profit (loss) for the year		14,227	12,703
Depreciation of the fair value adjustment and others		(19,229)	(14,913)
Profit (loss) for the year on the consolidated financial statements		(5,002)	(2,210)
Total comprehensive income (loss)		(3,758)	(5,413)
Profit (loss) attributable to non-controlling interests		(12,432)	(978)
Net cash provided by (used in) operating activities		248,524	238,378
Net cash provided by (used in) investing activities		(229,130)	(194,472)
Net cash provided by (used in) financing activities		11,134	(51,129)
Effects on exchange rate changes on cash and cash equivalents		(554)
Net increase(decrease) in cash and cash equivalents		29,974	(7,223)
Dividends paid to non-controlling interests		₩ 17,273	₩ 28,786
Incross Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Ownership of non-controlling interests (%)		55.20%	65.40%
Current assets		₩ 165,668	₩ 133,741
Non-current assets		13,640	10,522
Current liabilities		(101,065)	(77,530)
Non-current liabilities		(3,713)	(989)
Net assets		74,530	65,744
Net assets on the consolidated financial statements		74,530	65,744
Carrying amount of non-controlling interests		46,010	41,074
Revenue		39,440	19,787
Profit (loss) for the year		12,307	5,756
Profit (loss) for the year on the consolidated financial statements		12,307	5,756
Total comprehensive income (loss)		12,145	5,396
Profit (loss) attributable to non-controlling interests		7,568	3,630
Net cash provided by (used in) operating activities		24,629	(9,331)
Net cash provided by (used in) investing activities		(2,284)	5,053
Net cash provided by (used in) financing activities		(4,278)	(4,644)
Net increase(decrease) in cash and cash equivalents		₩ 18,067	(8,922)
SK Broadband Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Ownership of non-controlling interests (%)	24.90%	24.90%
Current assets	₩ 1,208,535	₩ 1,179,743
Non-current assets	4,762,970	4,586,065
Current liabilities	(1,410,823)	(1,279,132)
Non-current liabilities	(1,681,014)	(1,840,357)
Net assets	2,879,668	2,646,319
Fair value adjustment and others	(23,000)
Net assets on the consolidated financial statements	2,856,668	2,646,319
Carrying amount of non-controlling interests	725,540	665,020
Revenue	4,058,997	3,713,021	3,170,691
Profit (loss) for the year	213,468	150,694	₩ 47,701
Depreciation of the fair value adjustment and others	0
Profit (loss) for the year on the consolidated financial statements	213,468	150,694
Total comprehensive income (loss)	224,107	151,417
Profit (loss) attributable to non-controlling interests	53,645	27,240
Net cash provided by (used in) operating activities	1,064,638	1,035,474
Net cash provided by (used in) investing activities	(624,191)	(844,454)
Net cash provided by (used in) financing activities	(237,241)	(93,259)
Effects on exchange rate changes on cash and cash equivalents	(59)
Net increase(decrease) in cash and cash equivalents	203,147	₩ 97,761
Dividends paid to non-controlling interests	₩ 0

Significant Accounting Polici_4

Significant Accounting Policies - Estimated Useful Lives of the Group's Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2021
Bottom of range [member] | Buildings and structures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	15 years
Bottom of range [member] | Machinery [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	3 years
Bottom of range [member] | Other property and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	3 years
Bottom of range [member] | Right-of-use assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	1 year
Weighted average [member] | Machinery [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	15 years
Top of range [member] | Buildings and structures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	40 years
Top of range [member] | Machinery [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	30 years
Top of range [member] | Other property and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	10 years
Top of range [member] | Right-of-use assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (years)	50 years

Significant Accounting Polici_5

Significant Accounting Policies - Estimated Useful Lives of the Group's Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2021
Frequency usage rights [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	2 years 10 months 24 days
Frequency usage rights [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	10 years
Land usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	5 years
Industrial rights [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	5 years
Industrial rights [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	10 years
Development costs [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	5 years
Facility usage rights [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	10 years
Facility usage rights [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	20 years
Customer relations [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	3 years
Customer relations [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	15 years
Other [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	3 years
Other [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Useful lives (years)	20 years

Significant Accounting Polici_6

Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021
Disclosure of reclassification of financial assets [line items]
Investment property, estimated useful lives	30 years

Operating Segments - Segment In

Operating Segments - Segment Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Revenue	₩ 16,748,585	₩ 16,087,747	₩ 15,416,431
Depreciation and amortization	3,672,555	3,664,665	3,540,984
Operating profit (loss)	1,432,362	1,035,020	987,054
Gain relating to investments in subsidiaries, associates and joint ventures, net	446,300	52,456	33,199
Profit before income tax	1,718,191	905,218	807,033
Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	16,748,585	16,087,747	15,416,431
Depreciation and amortization	3,672,555	3,664,665	3,540,984
Operating profit (loss)	1,432,362	1,035,020	987,054
Finance income and costs, net	(160,471)	(182,258)	(213,220)
Gain relating to investments in subsidiaries, associates and joint ventures, net	446,300	52,456	33,199
Profit before income tax	1,718,191	905,218	807,033
Discontinued operations [member]
Disclosure of operating segments [line items]
Revenue	2,845,424	3,015,563	2,729,552
Depreciation and amortization	287,412	326,417	315,678
Operating profit (loss)	73,005	69,614	20,204
Finance income and costs, net	(222,406)	(73,739)	(82,580)
Gain relating to investments in subsidiaries, associates and joint ventures, net	1,502,147	975,947	416,344
Profit before income tax	1,352,746	971,822	353,968
Intersegment [member] | Discontinued operations [member]
Disclosure of operating segments [line items]
Revenue	462,341	478,659	405,267
External revenue [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	16,748,585	16,087,747	15,416,431
External revenue [member] | Discontinued operations [member]
Disclosure of operating segments [line items]
Revenue	2,383,083	2,536,904	2,324,285
Operating segments [member]
Disclosure of operating segments [line items]
Operating profit (loss)	1,431,767	1,291,505	1,092,851
Operating segments [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	19,368,026	18,638,202	17,981,678
Depreciation and amortization	3,782,607	3,777,697	3,629,752
Operating profit (loss)	1,431,767	1,291,505	1,092,851
Operating segments [member] | Intersegment [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	2,619,441	2,550,455	2,565,247
Operating segments [member] | External revenue [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	16,748,585	16,087,747	15,416,431
Operating segments [member] | Cellular services [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	14,214,407	13,853,274	13,787,009
Depreciation and amortization	2,812,827	2,892,460	2,828,285
Operating profit (loss)	1,123,147	1,031,887	963,207
Operating segments [member] | Cellular services [member] | Intersegment [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	1,495,934	1,505,311	1,563,205
Operating segments [member] | Cellular services [member] | External revenue [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	12,718,473	12,347,963	12,223,804
Operating segments [member] | Fixed-line telecommunication services [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	4,790,641	4,467,863	3,944,260
Depreciation and amortization	958,462	874,562	792,334
Operating profit (loss)	294,070	258,973	144,739
Operating segments [member] | Fixed-line telecommunication services [member] | Intersegment [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	1,112,935	1,035,645	984,967
Operating segments [member] | Fixed-line telecommunication services [member] | External revenue [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	3,677,706	3,432,218	2,959,293
Operating segments [member] | Others [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	362,978	317,065	250,409
Depreciation and amortization	11,318	10,675	9,133
Operating profit (loss)	14,550	645	(15,095)
Operating segments [member] | Others [member] | Intersegment [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	10,572	9,499	17,075
Operating segments [member] | Others [member] | External revenue [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	352,406	307,566	233,334
Adjustments [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	(2,619,441)	(2,550,455)	(2,565,247)
Depreciation and amortization	(110,052)	(113,032)	(88,768)
Operating profit (loss)	595	(256,485)	(105,797)
Adjustments [member] | Intersegment [member] | Continuing Operations [member]
Disclosure of operating segments [line items]
Revenue	₩ (2,619,441)	₩ (2,550,455)	₩ (2,565,247)

Operating Segments - Reconcilia

Operating Segments - Reconciliation of Total Segment Operating Income to Consolidated Operating Profit from Continuing Operations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Total segment operating profit	₩ 1,432,362	₩ 1,035,020	₩ 987,054
Gain on disposal of property and equipment and intangible assets	40,109	35,644	8,533
Other operating income	115,763	95,751	95,583
Impairment loss on property and equipment and intangible assets	(3,135)	(208,833)	(65,935)
Loss on disposal of property and equipment and intangible assets	(47,369)	(41,598)	(47,760)
Bad debt for accounts receivable — other	(6,001)	(10,559)	(5,802)
Other operating expenses	(1,431,587)	(1,658,362)	(1,410,288)
Operating segments [member]
Disclosure of operating segments [line items]
Total segment operating profit	1,431,767	1,291,505	1,092,851
Operating segments [member] | Adjustments [member]
Disclosure of operating segments [line items]
Total segment operating profit	(44,605)	(42,927)	(54,184)
Operating segments [member] | After adjustments [member]
Disclosure of operating segments [line items]
Total segment operating profit	1,387,162	1,248,578	1,038,667
Adjustments [member]
Disclosure of operating segments [line items]
Gain on disposal of property and equipment and intangible assets	39,136	34,625	7,755
Others	76,627	61,126	87,828
Other operating income	115,763	95,751	95,583
Impairment loss on property and equipment and intangible assets	(3,135)	(200,705)	(42,823)
Loss on disposal of property and equipment and intangible assets	(28,158)	(25,633)	(23,821)
Donations	(12,800)	(16,051)	(16,782)
Bad debt for accounts receivable — other	(3,995)	(6,640)	(3,594)
Others	(22,475)	(60,280)	(60,176)
Other operating expenses	₩ (70,563)	₩ (309,309)	₩ (147,196)

Operating Segments - Reconcil_2

Operating Segments - Reconciliation of Total Segment Operating Income to Consolidated Operating Profit from Continuing Operations (Parenthetical) (Detail) - KRW (₩) ₩ in Billions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Penalty refund			₩ 70
Penalties expenses	₩ (17)	₩ 51.2	₩ 42.4
Other [member]
Disclosure of operating segments [line items]
Gain loss on sale of business		₩ 12

Operating Segments - Additional

Operating Segments - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Revenue	₩ 16,748,585	₩ 16,087,747	₩ 15,416,431
Domestic [member]
Disclosure of operating segments [line items]
Revenue	16,734,000	16,072,000	15,402,000
Non-current assets	20,227,000	22,242,000	20,678,000
Outside of Korea [member]
Disclosure of operating segments [line items]
Non-current assets	₩ 4,000	₩ 63,000	₩ 63,000

Operating Segments - Summary of

Operating Segments - Summary of Disaggregation of Operating Revenue (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	₩ 19,131,668	₩ 18,624,651	₩ 17,740,716
Discontinued operations [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	2,383,083	2,536,904	2,324,285
Goods and Services transferred at a point in time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,393,600	1,358,344	1,495,844
Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	15,354,985	14,729,403	13,920,587
Cellular revenue [member] | Goods [member] | Goods and Services transferred at a point in time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	959,932	983,431	1,151,236
Cellular revenue [member] | Wireless service [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	10,100,368	9,806,719	9,538,162
Cellular revenue [member] | Cellular interconnection [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	493,820	472,215	494,267
Cellular revenue [member] | Other [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,164,353	1,085,598	1,040,139
Fixed-line telecommunication revenue [member] | Goods [member] | Goods and Services transferred at a point in time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	105,340	90,692	145,876
Fixed-line telecommunication revenue [member] | Cellular interconnection [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	69,769	83,762	92,396
Fixed-line telecommunication revenue [member] | Internet protocol television [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,786,765	1,606,740	1,285,831
Fixed-line telecommunication revenue [member] | International calls [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	162,379	160,293	137,902
Fixed-line telecommunication revenue [member] | Internet service and miscellaneous [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,336,453	1,260,330	1,071,731
Fixed-line telecommunication revenue [member] | Fixedline Service [Member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	217,000	230,401	225,557
Other revenue [member] | Other [member] | Goods and Services transferred at a point in time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	328,328	284,221	198,732
Other revenue [member] | Miscellaneous [member] | Goods and Services transferred over time [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	24,078	23,345	34,602
Continuing operations [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	₩ 16,748,585	₩ 16,087,747	₩ 15,416,431

Restricted Deposits - Deposits

Restricted Deposits - Deposits Which are Restricted in Use (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Short-term financial instruments	₩ 508,677	₩ 1,426,952
Long-term financial instruments	375	893
Financial instruments	509,052	1,427,845
Restricted deposits [member]
Disclosure of financial assets [line items]
Short-term financial instruments	79,500	98,057
Long-term financial instruments	372	890
Financial instruments	₩ 79,872	₩ 98,947

Trade and Other Receivables - D

Trade and Other Receivables - Details of Trade and Other Receivables (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Accounts receivable — trade	₩ 1,913,511	₩ 2,188,893
Short-term loans	70,817	97,464
Accounts receivable — other	548,362	979,044
Accrued income	762	3,252
Guarantee deposits (Other current assets)	92,046	112,733
Trade and other receivables, current	2,625,498	3,381,386
Long-term loans	21,979	40,233
Long-term accounts receivable — other	275,238	332,803
Guarantee deposits	186,713	172,474
Long-term accounts receivable — trade (Other non-current assets)	8,106	25,460
Trade and other receivables, noncurrent	492,036	570,970
Trade and other receivables	3,117,534	3,952,356
Gross amount [member]
Disclosure of financial assets [line items]
Accounts receivable — trade	2,152,358	2,453,149
Short-term loans	71,750	98,366
Accounts receivable — other	593,109	1,034,119
Accrued income	762	3,418
Guarantee deposits (Other current assets)	92,046	112,733
Trade and other receivables, current	2,910,025	3,701,785
Long-term loans	66,431	84,355
Long-term accounts receivable — other	277,116	332,803
Guarantee deposits	186,713	172,774
Long-term accounts receivable — trade (Other non-current assets)	8,140	25,702
Trade and other receivables, noncurrent	538,400	615,634
Trade and other receivables	3,448,425	4,317,419
Loss allowance [member]
Disclosure of financial assets [line items]
Accounts receivable — trade	(238,847)	(264,256)
Short-term loans	(933)	(902)
Accounts receivable — other	(44,747)	(55,075)
Accrued income	0	(166)
Guarantee deposits (Other current assets)	0	0
Trade and other receivables, current	(284,527)	(320,399)
Long-term loans	(44,452)	(44,122)
Long-term accounts receivable — other	(1,878)	0
Guarantee deposits	0	(300)
Long-term accounts receivable — trade (Other non-current assets)	(34)	(242)
Trade and other receivables, noncurrent	(46,364)	(44,664)
Trade and other receivables	₩ (330,891)	₩ (365,063)

Trade and Other Receivables -_2

Trade and Other Receivables - Details of Trade and Other Receivables (Parenthetical) (Detail) - KWD (د.ك) د.ك in Millions	Dec. 31, 2021	Dec. 31, 2020
Gross and carrying amounts of accounts receivable other [member]
Disclosure of financial assets [line items]
Financial instruments classified as FVTPL	د.ك 459,959	د.ك 517,175

Trade and Other Receivables - C

Trade and Other Receivables - Changes in Loss Allowance on Accounts Receivable - Trade Measured at Amortized Costs (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial assets [line items]
Impairment	₩ (37,547)	₩ (59,184)	₩ (34,643)
Spin-off	(2,281,910)
Trade and other receivables [member]
Disclosure of financial assets [line items]
Beginning balance	264,498	249,501
Impairment	31,546	48,625
Write-offs	(65,852)	(48,278)
Collection of receivables previously written-off	14,565	12,771
Business combination	878	1,879
Ending Balance	238,881	264,498	₩ 249,501
Spin-off	₩ (6,754)	₩ 0

Trade and Other Receivables - S

Trade and Other Receivables - Summary of Loss Allowance on Accounts Receivable - Trade (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial assets [line items]
Gross amount	₩ 1,921,617	₩ 2,214,353
Trade and other receivables [member]
Disclosure of financial assets [line items]
Loss allowance	₩ 238,881	₩ 264,498	₩ 249,501
Not Later Than Six Months [member] | Trade and other receivables [member] | Telecommunications service revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	2.06%
Gross amount	₩ 1,364,899
Loss allowance	₩ 28,102
Not Later Than Six Months [member] | Trade and other receivables [member] | Other revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	2.44%
Gross amount	₩ 565,378
Loss allowance	₩ 13,789
More Than 6 Months [Member] | Trade and other receivables [member] | Telecommunications service revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	76.34%
Gross amount	₩ 46,399
Loss allowance	₩ 35,422
More Than 6 Months [Member] | Trade and other receivables [member] | Other revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	43.30%
Gross amount	₩ 1,150
Loss allowance	₩ 498
1 - 3 years [Member] | Trade and other receivables [member] | Telecommunications service revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	86.51%
Gross amount	₩ 132,810
Loss allowance	₩ 114,891
1 - 3 years [Member] | Trade and other receivables [member] | Other revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	70.77%
Gross amount	₩ 6,192
Loss allowance	₩ 4,382
More than 3 years [Member] | Trade and other receivables [member] | Telecommunications service revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	99.92%
Gross amount	₩ 26,540
Loss allowance	₩ 26,519
More than 3 years [Member] | Trade and other receivables [member] | Other revenue [member]
Disclosure of financial assets [line items]
Expected credit loss rate	89.19%
Gross amount	₩ 17,130
Loss allowance	₩ 15,278

Prepaid Expenses - Summary of P

Prepaid Expenses - Summary of Prepaid Expenses (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of prepaid expenses [abstract]
Incremental costs of obtaining contracts	₩ 1,886,680	₩ 2,016,570
Others	100,823	111,779
Current prepaid expenses	1,987,503	2,128,349
Incremental costs of obtaining contracts	977,236	982,952
Others	91,912	80,759
Noncurrent prepayments	₩ 1,069,148	₩ 1,063,711

Prepaid Expenses - Summary of I

Prepaid Expenses - Summary of Incremental Costs of Obtaining Contracts That Capitalized as Assets and Related Amortization Recognized as impairment losses (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [abstract]
Amortization and impairment losses recognized	₩ 2,634,134	₩ 2,418,947	₩ 2,193,333

Contract Assets and Liabiliti_3

Contract Assets and Liabilities - Summary of Contract Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of revenue from contracts with customers [line items]
Contract liabilities	₩ 202,967	₩ 260,596
Allocation of consideration between performance obligations [member]
Disclosure of revenue from contracts with customers [line items]
Contract assets	118,278	148,281
Wireless service contracts [member]
Disclosure of revenue from contracts with customers [line items]
Contract liabilities	18,397	22,026
Customer loyalty programs [member]
Disclosure of revenue from contracts with customers [line items]
Contract liabilities	12,699	16,709
Fixed-line service contracts [member]
Disclosure of revenue from contracts with customers [line items]
Contract liabilities	118,525	106,916
Security services [member]
Disclosure of revenue from contracts with customers [line items]
Contract liabilities	0	30,597
Other contract liabilities [member]
Disclosure of revenue from contracts with customers [line items]
Contract liabilities	₩ 53,346	₩ 84,348

Contract Assets and Liabiliti_4

Contract Assets and Liabilities - Schedule of Performance Obligations (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of performance obligations [line items]
Contract liabilities	₩ 202,967	₩ 260,596
Wireless service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	18,397	22,026
Customer loyalty programs [member]
Disclosure of performance obligations [line items]
Contract liabilities	12,699	16,709
Fixed-line service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	118,525	106,916
Other contract liabilities [member]
Disclosure of performance obligations [line items]
Contract liabilities	53,346	₩ 84,348
Less than 1 year [member]
Disclosure of performance obligations [line items]
Contract liabilities	166,436
Less than 1 year [member] | Wireless service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	18,397
Less than 1 year [member] | Customer loyalty programs [member]
Disclosure of performance obligations [line items]
Contract liabilities	10,650
Less than 1 year [member] | Fixed-line service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	91,143
Less than 1 year [member] | Other contract liabilities [member]
Disclosure of performance obligations [line items]
Contract liabilities	46,246
1 - 2 years [member]
Disclosure of performance obligations [line items]
Contract liabilities	16,208
1 - 2 years [member] | Wireless service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	0
1 - 2 years [member] | Customer loyalty programs [member]
Disclosure of performance obligations [line items]
Contract liabilities	1,399
1 - 2 years [member] | Fixed-line service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	11,981
1 - 2 years [member] | Other contract liabilities [member]
Disclosure of performance obligations [line items]
Contract liabilities	2,828
More than 2 years [member]
Disclosure of performance obligations [line items]
Contract liabilities	20,323
More than 2 years [member] | Wireless service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	0
More than 2 years [member] | Customer loyalty programs [member]
Disclosure of performance obligations [line items]
Contract liabilities	650
More than 2 years [member] | Fixed-line service contracts [member]
Disclosure of performance obligations [line items]
Contract liabilities	15,401
More than 2 years [member] | Other contract liabilities [member]
Disclosure of performance obligations [line items]
Contract liabilities	₩ 4,272

Contract Assets and Liabiliti_5

Contract Assets and Liabilities - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue [abstract]
Revenue from performance obligations satisfied or partially satisfied in prior periods	₩ 185,515	₩ 142,144

Inventories - Details of Invent

Inventories - Details of Inventories (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of inventories [Line Items]
Merchandise	₩ 201,126	₩ 162,196
Finished goods	0	1,851
Work in process	0	1,761
Raw materials	0	5,016
Supplies	3,511	619
Inventories	204,637	171,443
Gross amount [member]
Disclosure of inventories [Line Items]
Merchandise	204,545	172,762
Finished goods	0	3,730
Work in process	0	2,579
Raw materials	0	11,921
Supplies	3,511	619
Inventories	208,056	191,611
Accumulated impairment [member]
Disclosure of inventories [Line Items]
Merchandise	(3,419)	(10,566)
Finished goods	0	(1,879)
Work in process	0	(818)
Raw materials	0	(6,905)
Supplies	0	0
Inventories	₩ (3,419)	₩ (20,168)

Inventories - Amount of the Inv

Inventories - Amount of the Inventory Write-downs Charged to the Consolidated Statement of Income and Write-off of Inventories (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Classes of current inventories [abstract]
Charged to cost of products that have been resold	₩ (3,287)	₩ (1,560)	₩ 15,019
Write-off upon sale	₩ (347)	₩ (3,312)	₩ (1,101)

Inventories - Additional Inform

Inventories - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Inventories [line items]
Reversals of inventory write-downs	₩ 0	₩ 0
Cost of goods sold [member]
Inventories [line items]
Inventories recognized as operating expenses	₩ 1,417,339	₩ 1,385,016	₩ 1,498,249

Investment Securities - Details

Investment Securities - Details of Short-term Investment Securities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Beneficiary certificates [member]
Disclosure of financial assets [line items]
FVTPL	₩ 5,010	₩ 150,392

Investment Securities - Detai_2

Investment Securities - Details of Long-term Investment Securities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Available-for-sale financial assets	₩ 1,715,078	₩ 1,648,837
Equity securities [member]
Disclosure of financial assets [line items]
Available-for-sale financial assets	1,510,428	1,454,361
FVOCI	57,830	67,833
Non current Assets	1,568,258	1,522,194
Investment bonds [member]
Disclosure of financial assets [line items]
FVOCI	1,177	1,080
FVTPL	145,643	125,563
Non current Assets	₩ 146,820	₩ 126,643

Investment Securities - Detai_3

Investment Securities - Details of Long-term Investment Securities (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2020
Disclosure of financial assets [line items]
Investments in equity instruments that are not held for trading as financial assets at FVOCI	₩ 1,510,428		₩ 1,454,361
Sale or issue of treasury shares	57,017	₩ 300,000
SK Square Co., Ltd [Member]
Disclosure of financial assets [line items]
Sale or issue of treasury shares	₩ 35,037

Business Combination - Addition

Business Combination - Additional information (Detail) ₩ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2020KRW (₩)shares	Dec. 31, 2021KRW (₩)moshares	Dec. 31, 2020KRW (₩)	Dec. 31, 2019KRW (₩)shares	Dec. 30, 2020
Disclosure of detailed information about business combination [line items]
Consideration transferred in cash			₩ 8,047
Goodwill		₩ 2,072,493	3,357,524	₩ 2,949,530
Revenue of combined entity			16,294,243
Profit or loss of combined entity			1,516,857
ADT CAPS Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Consideration transferred in cash			2,958
Goodwill			2,892
ADT CAPS Co., Ltd. [member] | Later Than Two Years [Member]
Disclosure of detailed information about business combination [line items]
Consideration transferred in cash			3,000
Incross Co Ltd [Member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares				2,786,455
Revenue of acquiree since acquisition date				₩ 19,787
Profit (loss) of acquiree since acquisition date				5,756
Consideration transferred in cash				₩ 53,722
Incross Co Ltd [Member] | Top of range [member]
Disclosure of detailed information about business combination [line items]
Ownership percentage				50.00%
SK Infosec Co., Ltd. [member] | Top of range [member]
Disclosure of detailed information about business combination [line items]
Ownership percentage					62.60%
SK Infosec Co., Ltd. [member] | Bottom of range [member]
Disclosure of detailed information about business combination [line items]
Ownership percentage					100.00%
Broadband Nowon Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares	627,000
Ownership percentage	55.00%
Revenue of acquiree since acquisition date	₩ 5,756
Profit (loss) of acquiree since acquisition date	426
Consideration transferred in cash	10,421		10,421
Other non-operating income	733
SK Broadband Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Goodwill	405,639	₩ 764,082	₩ 764,082
Buisness combination equity interests of acquirer transferred	₩ 862,147
Studio Dolphin Co Ltd [Member] | D R E A M U S C O M P A N Y [Member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares		10,000
Ownership percentage		100.00%
Revenue of acquiree since acquisition date		₩ 245
Profit (loss) of acquiree since acquisition date		304
Consideration transferred in cash		1,500
Goodwill		₩ 1,465
Ylp Inc [Member] | Tmap Mobility Co Ltd [Member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares		168,012
Ownership percentage		100.00%
Revenue of acquiree since acquisition date		₩ 20,488
Profit (loss) of acquiree since acquisition date		1,632
Consideration transferred in cash		55,598
Goodwill		69,516
Business combination aggregate consideration transferred		79,000
Buisness combination equity interests of acquirer transferred		₩ 23,402
Ylp Inc [Member] | Tmap Mobility Co Ltd [Member] | Tranche One [Member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares		118,242
Ownership percentage		70.40%
Ylp Inc [Member] | Tmap Mobility Co Ltd [Member] | Tranche Two [Member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares		267,700
Ownership percentage		29.60%
Business combination number of interests issued or issuable | mo		23,402
Buisness combination equity interests of acquirer transferred		₩ 49,770
Rockmedia Co Ltd [Member] | One Store Co Ltd [member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares		60,000
Ownership percentage		100.00%
Revenue of acquiree since acquisition date		₩ 10,915
Profit (loss) of acquiree since acquisition date		1,066
Consideration transferred in cash		40,000
Goodwill		₩ 33,641
Good Service Co Ltd [Member] | Tmap Mobility Co Ltd [Member]
Disclosure of detailed information about business combination [line items]
Number of shares | shares		2,000
Ownership percentage		100.00%
Revenue of acquiree since acquisition date		₩ 1,063
Profit (loss) of acquiree since acquisition date		621
Consideration transferred in cash		10,000
Goodwill		₩ 4,844

Business Combinations - Summary

Business Combinations - Summary of Acquiree (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Incross Co Ltd [Member]
Disclosure of detailed information about business combination [line items]
Corporate name			Incross Co., Ltd.
Location			5th floor, 1926, Nambusunhwan-ro, Gwanak-gu, Seoul, Korea
CEO			Lee, Jae-won
Industry			Media representative business
Studio Dolphin Co Ltd [Member] | DREAMUS COMPANY [member]
Disclosure of detailed information about business combination [line items]
Corporate name	Studio Dolphin Co., Ltd.
Location	3rd floor, 10, Jandari-ro 7an-gil, Mapo-gu, Seoul, Korea
CEO	Kim, Dong-Hee
Industry	Music and sound recording business
YLP Inc [Member] | T map Mobility Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Corporate name	YLP Inc.
Location	1740, Cheongwon-ro, Pyeongtaek-si, Gyeonggi-do, Korea
CEO	Lee, Hyeok-Ju
Industry	Freight forwarders and cargo agents
Rokmedia Co., Ltd [member] | One Store Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Corporate name	Rokmedia Co., Ltd.
Location	3rd floor, 330, Seongam-ro, Mapo-gu, Seoul, Korea
CEO	Kang, Jun-Gyu / Kim, Jeong-Su
Industry	Publishing and telecommunications retail business
GOOD SERVICE Co., Ltd [member] | T map Mobility Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Corporate name	GOOD SERVICE Co., Ltd.
Location	4th floor, 54, Daeheung-ro, Mapo-gu, Seoul, Korea
CEO	Kim, Seung-Wook
Industry	Surrogate driving service business and related business
Broadband Nowon Co., Ltd. [member]
Disclosure of detailed information about business combination [line items]
Corporate name		Broadband Nowon Co., Ltd.
Location		21, 81gil, Dobong-ro, Gangbuk-gu, Seoul, Korea
CEO		Yoo, Chang-Wan
Industry		Cable broadcasting services

Business Combinations - Conside

Business Combinations - Considerations Transferred Identifiable Assets Acquired and Liabilities Assumed at Acquisition Date (Detail) - KRW (₩) ₩ in Millions	1 Months Ended
	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Considerations paid:
Cash and cash equivalents			₩ 8,047
Incross Co Ltd [Member]
Considerations paid:
Cash and cash equivalents				₩ 53,722
Assets and liabilities acquired:
Cash and cash equivalents				17,400
Financial instruments				24,941
Accounts receivable — trade and other				67,259
Property and equipment				2,411
Other assets				9,254
Intangible assets				2,709
Accounts payable — trade and other				(57,309)
Other liabilities				(1,984)
Assets and liabilities acquired				64,681
Non-controlling interests				40,592
Goodwill				₩ 29,633
Studio Dolphin Co Ltd [Member] | DREAMUS COMPANY [member]
Considerations paid:
Cash and cash equivalents		₩ 1,500
Assets and liabilities acquired:
Cash and cash equivalents		20
Accounts receivable — trade and other		31
Other assets		7
Short-term borrowings		(2)
Accounts payable — trade and other		(4)
Other liabilities		(17)
Assets and liabilities acquired		35
Goodwill		1,465
YLP Inc [Member] | T map Mobility Co., Ltd. [member]
Considerations paid:
Cash and cash equivalents		55,598
Fair value of shares		23,402
Assets and liabilities acquired:
Cash and cash equivalents		1,897
Financial instruments		4,000
Accounts receivable — trade and other		4,480
Property and equipment		431
Other assets		325
Intangible assets		3,595
Accounts payable — trade and other		(3,542)
Borrowings		(1,000)
Other liabilities		(48)
Lease liabilities		(327)
Deferred tax liabilities		(327)
Assets and liabilities acquired		9,484
Goodwill		69,516
Rokmedia Co., Ltd [member] | One Store Co., Ltd. [member]
Considerations paid:
Cash and cash equivalents		40,000
Assets and liabilities acquired:
Cash and cash equivalents		719
Financial instruments		2,170
Accounts receivable — trade and other		1,374
Inventories		933
Property and equipment		792
Other assets		3,212
Short-term borrowings		30
Intangible assets		2,677
Accounts payable — trade and other		(1,885)
Borrowings		(1,485)
Provisions		(385)
Other liabilities		(111)
Lease liabilities		(56)
Contract liabilities		(1,401)
Income tax payable		(90)
Deferred tax liabilities		(135)
Assets and liabilities acquired		6,359
Goodwill		33,641
GOOD SERVICE Co., Ltd [member] | T map Mobility Co., Ltd. [member]
Considerations paid:
Cash and cash equivalents		10,000
Assets and liabilities acquired:
Cash and cash equivalents		1,328
Financial instruments		116
Accounts receivable — trade and other		1,881
Property and equipment		116
Intangible assets		3,492
Accounts payable — trade and other		(883)
Other liabilities		(85)
Lease liabilities		(113)
Deferred tax liabilities		(696)
Assets and liabilities acquired		5,156
Goodwill		₩ 4,844
SK Broadband Co., Ltd. [member]
Considerations paid:
Fair value of shares	₩ 862,147
Fair value of derivative liability	320,984
Assets and liabilities acquired:
Cash and cash equivalents	110,644
Financial instruments	6
Accounts receivable — trade and other	66,241
Property and equipment	245,654
Other assets	3,261
Intangible assets	423,515
Deferred tax assets	1,296
Accounts payable — trade and other	(105,179)
Contract liabilities	(1,674)
Contract assets	14,033
Defined benefit liabilities	(30)
Prepaid expenses	36,324
Provisions	(2,755)
Other liabilities	(15,655)
Long-term investment securities	6,239
Investments in associates and joint ventures	13,637
Income tax payable	(18,065)
Assets and liabilities acquired	777,492
Goodwill	405,639
Broadband Nowon Co., Ltd. [member]
Considerations paid:
Cash and cash equivalents	₩ 10,421		10,421
Assets and liabilities acquired:
Cash and cash equivalents			18,106
Accounts receivable — trade and other			1,122
Property and equipment			1,784
Other assets			595
Intangible assets			360
Accounts payable — trade and other			(1,351)
Other liabilities			(336)
Assets and liabilities acquired			20,280
Non-controlling interests			9,126
Goodwill			(733)
ADT CAPS Co., Ltd. [member]
Considerations paid:
Cash and cash equivalents			8,047
Assets and liabilities acquired:
Accounts receivable — trade and other			6,787
Property and equipment			363
Other assets			4
Intangible assets			6,460
Accounts payable — trade and other			(5,306)
Defined benefit liabilities			(1,227)
Other liabilities			(372)
Deferred tax liabilities			(1,554)
Assets and liabilities acquired			5,155
Goodwill			₩ 2,892

Investments in Associates and_3

Investments in Associates and Joint Ventures - Investments in Associates and Joint Ventures Accounted for using the Equity Method (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of investments in associates and joint ventures [Line Items]
Investments in associates, carrying amount	₩ 2,188,096	₩ 14,312,641
Investments in joint ventures, carrying amount	9,255	41,472
Investments in associates and joint ventures	₩ 2,197,351	₩ 14,354,113	₩ 13,385,264
Dogus Planet, Inc. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Joint ventures, Country	Turkey
Joint ventures, Ownership (%)		50.00%
Investments in joint ventures, carrying amount		₩ 15,071
Investments in associates and joint ventures		₩ 15,071	15,921
Finnq Co. Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Joint ventures, Country	Korea
Joint ventures, Ownership (%)	49.00%	49.00%
Investments in joint ventures, carrying amount	₩ 7,255	₩ 13,342
Investments in associates and joint ventures	₩ 7,255	₩ 13,342	22,880
Nextgen Broadcast Services Co LLC [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Joint ventures, Country	USA
Joint ventures, Ownership (%)		50.00%
Investments in joint ventures, carrying amount		₩ 5,850
Investments in associates and joint ventures		₩ 5,850	7,961
Nextgen Orchestration LLC [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Joint ventures, Country	USA
Joint ventures, Ownership (%)		50.00%
Investments in joint ventures, carrying amount		₩ 1,600
Investments in associates and joint ventures		₩ 1,600	1,646
Techmaker GMBH [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Joint ventures, Country	Germany
Joint ventures, Ownership (%)		50.00%
Investments in joint ventures, carrying amount		₩ 5,609
Investments in associates and joint ventures		₩ 5,609
UTC Kakao SK Telecom ESG Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Joint ventures, Country	Korea
Joint ventures, Ownership (%)	48.20%
Investments in joint ventures, carrying amount	₩ 2,000
Investments in associates and joint ventures	₩ 2,000
SK China Company Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	China
Associates, Ownership (%)	27.30%	27.30%
Investments in associates, carrying amount	₩ 793,754	₩ 555,133
Investments in associates and joint ventures	₩ 793,754	₩ 555,133	568,459
Korea IT fund [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)	63.30%	63.30%
Investments in associates, carrying amount	₩ 339,976	₩ 323,294
Investments in associates and joint ventures	₩ 339,976	₩ 323,294	311,552
KEB HanaCard Co., Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)	15.00%	15.00%
Investments in associates, carrying amount	₩ 349,866	₩ 314,930
Investments in associates and joint ventures	₩ 349,866	₩ 314,930	294,756
SK Telecom CS T1 Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)		54.90%
Investments in associates, carrying amount		₩ 53,010
Investments in associates and joint ventures		₩ 53,010	60,305
NanoEnTek, Inc. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)		28.40%
Investments in associates, carrying amount		₩ 43,190
Investments in associates and joint ventures		₩ 43,190	42,127
UniSK [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	China
Associates, Ownership (%)	49.00%	49.00%
Investments in associates, carrying amount	₩ 19,156	₩ 15,700
Investments in associates and joint ventures	₩ 19,156	₩ 15,700	14,342
SK Technology Innovation Company [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Cayman Islands
Associates, Ownership (%)	49.00%	49.00%
Investments in associates, carrying amount	₩ 86,301	₩ 41,579
Investments in associates and joint ventures	₩ 86,301	₩ 41,579	43,997
SK MENA Investment B.V. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Netherlands
Associates, Ownership (%)	32.10%	32.10%
Investments in associates, carrying amount	₩ 15,343	₩ 14,043
Investments in associates and joint ventures	₩ 15,343	₩ 14,043	14,904
SK hynix Inc. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)		20.10%
Investments in associates, carrying amount		₩ 12,251,861
Investments in associates and joint ventures		₩ 12,251,861	11,425,325
SK Latin America Investment SA [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Spain
Associates, Ownership (%)	32.10%	32.10%
Investments in associates, carrying amount	₩ 14,004	₩ 13,930
Investments in associates and joint ventures	₩ 14,004	₩ 13,930	13,698
Grab Geo Holdings PTE LTD [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Singapore
Associates, Ownership (%)		30.00%
Investments in associates, carrying amount		₩ 30,063
Investments in associates and joint ventures		₩ 30,063	31,269
SK South East Asia Investment Pte. Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Singapore
Associates, Ownership (%)	20.00%	20.00%
Investments in associates, carrying amount	₩ 348,782	₩ 311,990
Pacific Telecom Inc [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	USA
Associates, Ownership (%)	15.00%	15.00%
Investments in associates, carrying amount	₩ 43,789	₩ 39,723
Investments in associates and joint ventures	₩ 43,789	₩ 39,723	40,016
S.M. Culture & Contents Co., Ltd [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)	23.10%	23.30%
Investments in associates, carrying amount	₩ 60,261	₩ 62,248
Investments in associates and joint ventures	₩ 60,261	₩ 62,248	63,469
Content Wavve Co., Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)		30.00%
Investments in associates, carrying amount		₩ 75,803
Investments in associates and joint ventures		₩ 75,803	83,640
Hello Nature Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)		49.90%
Investments in associates, carrying amount		₩ 11,969
Investments in associates and joint ventures		₩ 11,969	13,620
Digital Games International Pte Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Singapore
Associates, Ownership (%)	33.30%	33.30%
Investments in associates, carrying amount	₩ 2,208	₩ 6,449
Investments in associates and joint ventures	₩ 2,208	₩ 6,449
Invites Healthcare Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)	27.10%	43.50%
Investments in associates, carrying amount	₩ 26,474	₩ 25,536
Investments in associates and joint ventures	₩ 26,474	₩ 25,536
Nam Incheon Broadcasting Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)	27.30%	27.30%
Investments in associates, carrying amount	₩ 12,525	₩ 10,902
Investments in associates and joint ventures	₩ 12,525	₩ 10,902
NANOXIMAGING Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Israel
Associates, Ownership (%)		5.60%
Investments in associates, carrying amount		₩ 28,484
Investments in associates and joint ventures		₩ 28,484
Home Choice Corp [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)	17.80%	17.80%
Investments in associates, carrying amount	₩ 3,052	₩ 3,585
Investments in associates and joint ventures	₩ 3,052	₩ 3,585
Carrot General Insurance Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Associates, Country	Korea
Associates, Ownership (%)		21.40%
Investments in associates, carrying amount		₩ 13,469
Investments in associates and joint ventures		13,469	6,459
12CM JAPAN and others [member]
Disclosure of investments in associates and joint ventures [Line Items]
Investments in associates, carrying amount	₩ 72,605	65,750
Investments in associates and joint ventures	₩ 72,605	₩ 65,750	₩ 58,884

Investments in Associates and_4

Investments in Associates and Joint Ventures - Investments in Associates and Joint Ventures Accounted for using the Equity Method (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of investments in associates and joint ventures [Line Items]
Purchase of investments in cash	₩ 222,765	₩ 170,292	₩ 264,015
S.M. Culture & Contents Co., Ltd [member]
Disclosure of investments in associates and joint ventures [Line Items]
Percentage of change in company ownership	23.10%	23.30%
SK Telecom Smart City Management Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Percentage of change in company ownership	27.10%	43.50%
SK Telecom Smart City Management Co Ltd [Member] | Invites Healthcare Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Contribution of accounts receivable	₩ 7,000
Twelve CM Japan Inc [member]
Disclosure of investments in associates and joint ventures [Line Items]
Gain on disposal of investments in associates	100,000
Tree Pay Co. Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Impairment loss	174
UTC Kakao SK Telecom ESG Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Purchase of investments in cash	₩ 2,000

Investments in Associates and_5

Investments in Associates and Joint Ventures - Market Price of Investments in Listed Associates (Detail) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)₩ / sharesshares	Dec. 31, 2020KRW (₩)₩ / sharesshares	Dec. 31, 2020$ / shares
NanoEnTek, Inc. [member]
Disclosure of associates [Line Items]
Market price per share | ₩ / shares		₩ 8,620
Number of shares | shares		7,600,649
Market value | ₩		₩ 65,518
SK hynix Inc. [member]
Disclosure of associates [Line Items]
Market price per share | ₩ / shares		₩ 118,500
Number of shares | shares		146,100,000
Market value | ₩		₩ 17,312,850
S.M. Culture & Contents Co., Ltd [member]
Disclosure of associates [Line Items]
Market price per share | ₩ / shares	₩ 4,485	₩ 1,630
Number of shares | shares	22,033,898	22,033,898
Market value | ₩	₩ 98,822	₩ 35,915
NANOXIMAGING Ltd [Member]
Disclosure of associates [Line Items]
Market price per share | (per share)		₩ 49,678	$ 45.66
Number of shares | shares		2,607,466
Market value | ₩		₩ 129,534

Investments in Associates and_6

Investments in Associates and Joint Ventures - Financial Information of Significant Associates (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of associates [Line Items]
Current assets	₩ 6,352,665	₩ 8,775,086
Non-current assets	24,558,612	39,131,871
Current liabilities	6,960,435	8,177,967
Non-current liabilities	11,615,704	15,332,747
Revenue	16,864,348	16,183,498	₩ 15,512,014
Profit for the year	2,418,989	1,500,538	860,733
Other comprehensive income (loss)	1,362,192	461,822	1,009
Total comprehensive income	3,781,181	1,962,360	861,742
SK hynix Inc. [member]
Disclosure of associates [Line Items]
Current assets		16,570,953	14,457,602
Non-current assets		54,602,900	50,331,892
Current liabilities		9,072,360	7,874,033
Non-current liabilities		10,192,396	8,972,266
Revenue		31,900,418	26,990,733
Profit for the year		4,758,914	2,016,391
Other comprehensive income (loss)		(107,378)	94,023
Total comprehensive income		4,651,536	2,110,414
KEB HanaCard Co., Ltd. [member]
Disclosure of associates [Line Items]
Current assets	9,130,044	7,910,517	7,974,407
Non-current assets	465,333	298,438	207,284
Current liabilities	1,281,783	897,594	1,015,657
Non-current liabilities	6,284,587	5,531,968	5,537,850
Revenue	1,270,568	1,231,815	1,236,678
Profit for the year	250,484	154,521	56,281
Other comprehensive income (loss)	909	(4,283)	(4,458)
Total comprehensive income	251,393	150,238	51,823
Korea IT fund [member]
Disclosure of associates [Line Items]
Current assets	117,172	107,652	113,233
Non-current assets	419,632	402,812	378,691
Revenue	58,741	52,330	70,565
Profit for the year	50,107	36,615	53,867
Other comprehensive income (loss)	(6,847)	9,647	6,132
Total comprehensive income	43,260	46,262	59,999
SK China Company Ltd. [member]
Disclosure of associates [Line Items]
Current assets	1,124,219	380,413	615,028
Non-current assets	1,849,102	1,706,634	1,442,748
Current liabilities	53,199	51,025	59,395
Non-current liabilities	316,470	308,606	215,354
Revenue	80,241	107,791	116,269
Profit for the year	933,475	20,369	23,474
Other comprehensive income (loss)	326,661	42,921	(15,093)
Total comprehensive income	1,260,136	63,290	8,381
SK South East Asia Investment Pte Ltd [member]
Disclosure of associates [Line Items]
Current assets	133,110	797,045	81,065
Non-current assets	2,853,184	1,672,412	1,797,239
Current liabilities	412,962	67	94
Revenue	9,945
Profit for the year	(188,678)	(158,680)	1,190
Other comprehensive income (loss)	304,700	(390,851)	97,508
Total comprehensive income	₩ 116,022	₩ (549,531)	₩ 98,698

Investments in Associates and_7

Investments in Associates and Joint Ventures - Condensed Financial Information of Joint Ventures (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of joint ventures [line items]
Current assets	₩ 6,352,665	₩ 8,775,086
Cash and cash equivalents	872,731	1,369,653	₩ 1,270,824	₩ 1,506,699
Non-current assets	24,558,612	39,131,871
Current liabilities	6,960,435	8,177,967
Non-current liabilities	11,615,704	15,332,747
Revenue	16,864,348	16,183,498	15,512,014
Depreciation and amortization	(3,672,555)	(3,664,665)	(3,540,984)
Interest income	155,133	140,685	121,692
Interest expense	(342,342)	(399,176)	(406,087)
Profit (loss) for the year	2,418,989	1,500,538	860,733
Total comprehensive income (loss)	₩ 3,781,181	1,962,360	861,742
Dogus Planet, Inc. [member]
Disclosure of joint ventures [line items]
Current assets		55,951	59,632
Cash and cash equivalents		9,083	13,422
Non-current assets		30,408	25,247
Current liabilities		46,186	52,238
Accounts payable, other payables and provisions		28,145	35,459
Non-current liabilities		10,031	800
Revenue		177,084	136,777
Depreciation and amortization		(4,642)	(5,487)
Interest income		1,878	1,455
Interest expense		(555)	(92)
Profit (loss) for the year		7,030	9,294
Total comprehensive income (loss)		(1,659)	9,294
Finnq Co. Ltd. [member]
Disclosure of joint ventures [line items]
Current assets		26,781	42,995
Cash and cash equivalents		23,936	40,619
Non-current assets		8,530	11,389
Current liabilities		7,367	6,756
Accounts payable, other payables and provisions		5,094	5,062
Non-current liabilities		879	1,099
Revenue		3,937	1,968
Depreciation and amortization		(4,417)	(4,769)
Interest income		29	12
Interest expense		(51)	(198)
Profit (loss) for the year		(19,426)	(17,079)
Total comprehensive income (loss)		₩ (19,426)	₩ (17,361)

Investments in Associates and_8

Investments in Associates and Joint Ventures - Reconciliations of Financial Information of Significant Associates to Carrying Amounts of Investments in Associates in the Consolidated Financial Statements (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of associates [Line Items]
Carrying amount	₩ 2,188,096	₩ 14,312,641
SK hynix Inc. [member]
Disclosure of associates [Line Items]
Net assets		₩ 51,883,236
Ownership interests (%)		20.10%
Net assets attributable to ownership interests		₩ 11,082,048
Cost-book value differentials		1,169,813
Carrying amount		12,251,861
KEB HanaCard Co., Ltd. [member]
Disclosure of associates [Line Items]
Net assets	₩ 2,029,007	₩ 1,779,393
Ownership interests (%)	15.00%	15.00%
Net assets attributable to ownership interests	₩ 304,351	₩ 266,909
Cost-book value differentials	45,515	48,021
Carrying amount	349,866	314,930
Korea IT fund [member]
Disclosure of associates [Line Items]
Net assets	₩ 536,804	₩ 510,464
Ownership interests (%)	63.30%	63.30%
Net assets attributable to ownership interests	₩ 339,976	₩ 323,294
Carrying amount	339,976	323,294
SK China Company Ltd. [member]
Disclosure of associates [Line Items]
Net assets	₩ 2,603,336	₩ 1,725,949
Ownership interests (%)	27.30%	27.30%
Net assets attributable to ownership interests	₩ 709,961	₩ 470,687
Cost-book value differentials	83,793	84,446
Carrying amount	793,754	555,133
SK South East Asia Investment Pte Ltd [member]
Disclosure of associates [Line Items]
Net assets	₩ 1,743,908	₩ 1,559,951
Ownership interests (%)	20.00%	20.00%
Net assets attributable to ownership interests	₩ 348,782	₩ 311,990
Carrying amount	₩ 348,782	₩ 311,990

Investments in Associates and_9

Investments in Associates and Joint Ventures - Details of the Changes in Investments in Associates and Joint Ventures Accounted for using the Equity Method (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	₩ 14,354,113	₩ 13,385,264
Acquisition and disposition	340,237	199,188
Share of profit (loss)	1,823,252	1,010,489
Other comprehensive income (loss)	360,858	(115,463)
Other increase (decrease)	(320,949)	(139,002)
Spin-off	(14,360,160)
Business Combination		13,637
Ending balance	2,197,351	14,354,113
SK China Company Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	555,133	568,459
Share of profit (loss)	274,066	3,752
Other comprehensive income (loss)	95,696	(17,078)
Other increase (decrease)	(131,141)
Ending balance	793,754	555,133
Korea IT fund [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	323,294	311,552
Share of profit (loss)	31,734	23,189
Other comprehensive income (loss)	(4,336)	6,110
Other increase (decrease)	(10,716)	(17,557)
Ending balance	339,976	323,294
KEB HanaCard Co., Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	314,930	294,756
Share of profit (loss)	35,057	20,671
Other comprehensive income (loss)	(121)	(497)
Ending balance	349,866	314,930
SK Telecom CS T1 Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	53,010	60,305
Acquisition and disposition	4,888
Share of profit (loss)	(8,769)	(7,282)
Other comprehensive income (loss)	(575)	(13)
Spin-off	(48,554)
Ending balance		53,010
NanoEnTek, Inc. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	43,190	42,127
Acquisition and disposition		143
Share of profit (loss)	1,836	830
Other comprehensive income (loss)	(86)	90
Spin-off	(44,940)
Ending balance		43,190
UniSK [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	15,700	14,342
Share of profit (loss)	1,475	1,403
Other comprehensive income (loss)	1,981	168
Other increase (decrease)		(213)
Ending balance	19,156	15,700
SK Technology Innovation Company [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	41,579	43,997
Share of profit (loss)	39,256	184
Other comprehensive income (loss)	5,466	(2,602)
Ending balance	86,301	41,579
SK MENA Investment B.V. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	14,043	14,904
Share of profit (loss)	2
Other comprehensive income (loss)	1,298	(861)
Ending balance	15,343	14,043
SK hynix Inc. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	12,251,861	11,425,325
Acquisition and disposition	19,482
Share of profit (loss)	1,542,757	995,117
Other comprehensive income (loss)	197,473	(22,481)
Other increase (decrease)	(170,937)	(146,100)
Spin-off	(13,840,636)
Ending balance		12,251,861
SK Latin America Investment SA [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	13,930	13,698
Share of profit (loss)	(49)	(40)
Other comprehensive income (loss)	123	272
Ending balance	14,004	13,930
Grab Geo Holdings PTE LTD [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	30,063	31,269
Share of profit (loss)		(425)
Other comprehensive income (loss)		(781)
Spin-off	(30,063)
Ending balance		30,063
Associates [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	14,312,641	13,336,856
Acquisition and disposition	298,998	193,579
Share of profit (loss)	1,837,595	1,018,286
Other comprehensive income (loss)	362,278	(111,160)
Other increase (decrease)	(322,581)	(138,557)
Spin-off	(14,300,835)
Business Combination		13,637
Ending balance	2,188,096	14,312,641
SK South East Asia Investment Pte Ltd [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	311,990	250,034
Acquisition and disposition		119,770
Share of profit (loss)	(18,218)	11,250
Other comprehensive income (loss)	55,010	(69,064)
Ending balance	348,782	311,990
S.M. Culture & Contents Co., Ltd [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	62,248	63,469
Acquisition and disposition	144	(162)
Share of profit (loss)	(2,484)	(813)
Other comprehensive income (loss)	353	(246)
Ending balance	60,261	62,248
Pacific Telecom Inc [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	39,723	40,016
Share of profit (loss)	1,598	2,307
Other comprehensive income (loss)	2,468	(1,621)
Other increase (decrease)		(979)
Ending balance	43,789	39,723
Twelve CM Japan Inc [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	65,750	58,884
Acquisition and disposition	9,038	(1,508)
Share of profit (loss)	(2,869)	(2,134)
Other comprehensive income (loss)	7,693	(2,302)
Other increase (decrease)	(1,624)	12,810
Ending balance	72,605	65,750
Contents Wavve Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	75,803	83,640
Acquisition and disposition	100,000
Share of profit (loss)	(20,716)	(7,837)
Spin-off	(155,087)
Ending balance		75,803
Hello Nature Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	11,969	13,620
Acquisition and disposition	9,980	9,980
Share of profit (loss)	(10,899)	(11,118)
Other comprehensive income (loss)	(1)	(79)
Other increase (decrease)	(1,730)	(434)
Spin-off	(9,319)
Ending balance		11,969
Carrot General Insurance Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	13,469	6,459
Acquisition and disposition	12,289	31
Share of profit (loss)	(6,666)	(6,188)
Other comprehensive income (loss)	(358)	(33)
Other increase (decrease)	(8,734)	13,200
Spin-off	10,000
Ending balance		13,469
Digital Games International Pte Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	6,449
Acquisition and disposition		8,810
Share of profit (loss)	(4,529)	(2,038)
Other comprehensive income (loss)	288	(323)
Ending balance	2,208	6,449
Invites Healthcare Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	25,536
Acquisition and disposition	7,000	28,000
Share of profit (loss)	(5,968)	(2,645)
Other comprehensive income (loss)	(94)	181
Ending balance	26,474	25,536
Nam Incheon Broadcasting Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	10,902
Share of profit (loss)	1,759	676
Other increase (decrease)	(136)
Business Combination		10,226
Ending balance	12,525	10,902
NANOXIMAGING Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	28,484
Acquisition and disposition	(47)	28,515
Share of profit (loss)	(2,049)	(747)
Other increase (decrease)	2,437	716
Spin-off	(28,825)
Ending balance		28,484
Home Choice Corp [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	3,585
Share of profit (loss)	(533)	174
Business Combination		3,411
Ending balance	3,052	3,585
TWELVE C M JAPAN And Others [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Spin-off	(5,383)
Bertis Inc [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Acquisition and disposition	15,739
Share of profit (loss)	(423)
Spin-off	(15,316)
UT LLC [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Acquisition and disposition	86,319
Share of profit (loss)	(7,773)
Spin-off	(78,546)
SPARKPLUS Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Acquisition and disposition	34,166
Spin-off	(34,166)
Dogus Planet, Inc. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	15,071	15,921
Share of profit (loss)	(6,990)	3,453
Other comprehensive income (loss)	(1,447)	(4,303)
Spin-off	(6,634)
Ending balance		15,071
Finnq Co. Ltd. [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	13,342	22,880
Share of profit (loss)	(5,969)	(9,538)
Other comprehensive income (loss)	(118)
Ending balance	7,255	13,342
Joint ventures [member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	41,472	48,408
Acquisition and disposition	41,239	5,609
Share of profit (loss)	(14,343)	(7,797)
Other comprehensive income (loss)	(1,420)	(4,303)
Other increase (decrease)	1,632	(445)
Spin-off	(59,325)
Ending balance	9,255	41,472
Nextgen Broadcast Services Co LLC [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	5,850	7,961
Acquisition and disposition	9,048
Share of profit (loss)	(1,276)	(1,769)
Other increase (decrease)	892	(342)
Spin-off	(14,514)
Ending balance		5,850
Nextgen Orchestration LLC [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	1,600	1,646
Share of profit (loss)		57
Other increase (decrease)	142	(103)
Spin-off	(1,742)
Ending balance		1,600
Techmaker GMBH [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Beginning balance	5,609
Acquisition and disposition		5,609
Share of profit (loss)	(94)
Other comprehensive income (loss)	145
Spin-off	(5,660)
Ending balance		₩ 5,609
Korea Content Platform [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Acquisition and disposition	30,191
Share of profit (loss)	(14)
Other increase (decrease)	598
Spin-off	(30,775)
UTC Kakao SK Telecom ESG Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Acquisition and disposition	2,000
Ending balance	₩ 2,000

Investments in Associates an_10

Investments in Associates and Joint Ventures - Details of the Changes in Investments in Associates and Joint Ventures Accounted for using the Equity Method (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of investments in associates and joint ventures [Line Items]
Impairment losses for financial assets	₩ 37,547	₩ 59,184	₩ 34,643
Financial assets measured at fair value	1,510,428	1,454,361
Other increase (decrease)	(320,949)	(139,002)
Spin-off	(14,360,160)
Health Connect Co., Ltd. and others [member]
Disclosure of investments in associates and joint ventures [Line Items]
Disposal value of investments		1,142
Twenty Ten KIF Stone Bridge IT Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Disposal value of investments		2,056
SK Telecom Smart City Management Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Disposal value of investments		1,984
Laguna Dynamic Game Contents Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments		1,600
KDX Korea Data Exchange [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments		1,342
Disposal value of investments	334
Walden SKT Venture Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments	687	708
Associates [member]
Disclosure of investments in associates and joint ventures [Line Items]
Financial assets measured at fair value		3,621
Other increase (decrease)	(322,581)	(138,557)
Spin-off	(14,300,835)
Carrot General Insurance Co Ltd [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Preferred shares value acquired through investments in associates		13,200
Other increase (decrease)	(8,734)	13,200
Spin-off	10,000
Studio Yesone [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments	1,000
Sonnori Corp [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments	1,000
SMART SKT Infinitum Game Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments	3,000
Laguna Dynamic Game And Content Fund [Member]
Disclosure of investments in associates and joint ventures [Line Items]
Cash investments	1,600
Hello Nature Ltd [member]
Disclosure of investments in associates and joint ventures [Line Items]
Impairment losses for financial assets	₩ 1,730	₩ 434

Investments in Associates an_11

Investments in Associates and Joint Ventures - Details of Cumulative Unrecognized Equity Method Losses (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)
Disclosure of associates [Line Items]
Unrecognized loss (profit)	₩ 976
Unrecognized loss (profit), cumulative loss	14,323
Unrecognized change in equity, cumulative loss	(124)
Wave City Development Co., Ltd. [member]
Disclosure of associates [Line Items]
Unrecognized loss (profit)	6,143
Unrecognized loss (profit), cumulative loss	8,543
Daehan Kanggun BcN Co., Ltd. and others [member]
Disclosure of associates [Line Items]
Unrecognized loss (profit)	(5,167)
Unrecognized loss (profit), cumulative loss	5,780
Unrecognized change in equity, cumulative loss	₩ (124)

Property and Equipment - Summar

Property and Equipment - Summary of Property and Equipment (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	₩ 12,871,259	₩ 13,377,077	₩ 12,933,460
Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	44,074,194	44,520,534
Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(31,197,650)	(31,124,448)
Accumulated impairment loss [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(5,285)	(19,009)
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	972,800	1,039,323	981,389
Land [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	972,800	1,039,323
Buildings and structures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	794,453	858,606	867,408
Buildings and structures [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	1,692,239	1,747,445
Buildings and structures [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(897,336)	(888,389)
Buildings and structures [member] | Accumulated impairment loss [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(450)	(450)
Structures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	291,279	317,403	347,069
Structures [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	922,637	913,102
Structures [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(629,757)	(594,098)
Structures [member] | Accumulated impairment loss [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(1,601)	(1,601)
Machinery [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	7,997,927	8,376,212	7,924,392
Machinery [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	35,770,485	36,152,031
Machinery [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(27,771,040)	(27,761,449)
Machinery [member] | Accumulated impairment loss [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(1,518)	(14,370)
Other property and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	487,716	653,616	731,066
Other property and equipment [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	1,718,337	2,047,405
Other property and equipment [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(1,230,128)	(1,391,201)
Other property and equipment [member] | Accumulated impairment loss [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(493)	(2,588)
Rights-of-use assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	1,559,333	1,472,035
Rights-of-use assets [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	2,229,945	1,961,346
Rights-of-use assets [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(669,389)	(489,311)
Rights-of-use assets [member] | Accumulated impairment loss [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	(1,223)
Construction in progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	767,751	659,882	₩ 755,508
Construction in progress [member] | Gross amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property and equipment	₩ 767,751	₩ 659,882

Property and Equipment - Change

Property and Equipment - Changes in Property and Equipment (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	₩ 13,377,077	₩ 12,933,460
Acquisition	3,798,576	3,866,027
Disposal	(145,380)	(264,877)
Transfer	(265,978)	(252,250)
Depreciation	(3,103,087)	(3,151,339)
Impairment	(2,772)	(1,745)
Business Combination	1,339	247,801
Spin-off	2,186,719
Ending balance	12,871,259	13,377,077
Parent Company [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Spin-off	(788,516)
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	1,039,323	981,389
Acquisition	634	525
Disposal	(21,557)	(20,415)
Transfer	24,789	37,532
Business Combination		40,292
Spin-off	(70,389)
Ending balance	972,800	1,039,323
Buildings
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	858,606	867,408
Acquisition	3,919	3,034
Disposal	(9,706)	(21,811)
Transfer	47,612	48,160
Depreciation	(55,818)	(55,215)
Business Combination	639	17,030
Spin-off	(50,799)
Ending balance	794,453	858,606
Structures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	317,403	347,069
Acquisition	2,482	2,542
Disposal	(6,124)	(4,417)
Transfer	16,546	9,167
Depreciation	(37,968)	(36,995)
Business Combination		37
Spin-off	(1,060)
Ending balance	291,279	317,403
Machinery [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	8,376,212	7,924,392
Acquisition	593,225	553,052
Disposal	(44,477)	(32,369)
Transfer	1,816,003	2,180,445
Depreciation	(2,394,351)	(2,419,522)
Impairment	(1,054)	(1,745)
Business Combination		171,959
Spin-off	(347,631)
Ending balance	7,997,927	8,376,212
Other
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	653,616	731,066
Acquisition	830,277	945,499
Disposal	(2,286)	(6,486)
Transfer	(607,271)	(817,819)
Depreciation	(180,980)	(203,376)
Impairment	(495)
Business Combination	193	4,732
Spin-off	(205,338)
Ending balance	487,716	653,616
Right-of-use assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	1,472,035	1,326,628
Acquisition	672,723	736,157
Disposal	(60,159)	(163,217)
Transfer	(9,610)
Depreciation	(433,970)	(436,231)
Impairment	(1,223)
Business Combination	507	8,698
Spin-off	(80,970)
Ending balance	1,559,333	1,472,035
Construction in progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	659,882	755,508
Acquisition	1,695,316	1,625,218
Disposal	(1,071)	(16,162)
Transfer	(1,554,047)	(1,709,735)
Business Combination		5,053
Spin-off	(32,329)
Ending balance	₩ 767,751	₩ 659,882

Investment Property - Disclosur

Investment Property - Disclosure of Detailed Information About Investment Property Explanatory (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about investment property [line items]
Investment Property	₩ 23,034	₩ 0
Transfer	23,034
Acquisition Cost [Member]
Disclosure of detailed information about investment property [line items]
Investment Property	39,669
Accumulated depreciation and amortization [member]
Disclosure of detailed information about investment property [line items]
Investment Property	(16,635)
Gross Carrying Amount
Disclosure of detailed information about investment property [line items]
Investment Property	23,034
Land [member] | Acquisition Cost [Member]
Disclosure of detailed information about investment property [line items]
Investment Property	6,071
Land [member] | Gross Carrying Amount
Disclosure of detailed information about investment property [line items]
Investment Property	6,071
Right Of use Asset Member | Acquisition Cost [Member]
Disclosure of detailed information about investment property [line items]
Investment Property	12,577
Right Of use Asset Member | Accumulated depreciation and amortization [member]
Disclosure of detailed information about investment property [line items]
Investment Property	(2,967)
Right Of use Asset Member | Gross Carrying Amount
Disclosure of detailed information about investment property [line items]
Investment Property	9,610
Buildings | Acquisition Cost [Member]
Disclosure of detailed information about investment property [line items]
Investment Property	21,021
Buildings | Accumulated depreciation and amortization [member]
Disclosure of detailed information about investment property [line items]
Investment Property	(13,668)
Buildings | Gross Carrying Amount
Disclosure of detailed information about investment property [line items]
Investment Property	₩ 7,353

Investment Property - Additiona

Investment Property - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about investment property [line items]
Rental income from investment property	₩ 5,036
Investment Property	23,034	₩ 0
At Fair Value Member
Disclosure of detailed information about investment property [line items]
Investment Property	₩ 66,128

Lease - Summary of right of use

Lease - Summary of right of use assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	₩ 1,559,333	₩ 1,472,035
Land buildings and structures [member]
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	1,392,925	1,269,753
Other assets [member]
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	₩ 166,408	₩ 202,282

Lease - Summary of amounts reco

Lease - Summary of amounts recognized in the condensed consolidated interim statements of income of leases (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Depreciation Right Of Use Assets [Abstract]
Depreciation, right-of-use assets	₩ 433,970	₩ 436,231	₩ 448,817
Interest expense on lease liabilities	23,998	22,976	25,981
Expenses related to short-term leases	25,435	20,193	19,098
Expenses related to leases of low-value assets except for short-term leases	3,772	3,297	2,550
Land Buildings And Structures [Member]
Depreciation Right Of Use Assets [Abstract]
Depreciation, right-of-use assets	338,304	347,166	359,755
Other assets [member]
Depreciation Right Of Use Assets [Abstract]
Depreciation, right-of-use assets	₩ 95,666	₩ 89,065	₩ 89,062

Lease - Summary of maturity ana

Lease - Summary of maturity analysis for finance lease receivables (Detail) ₩ in Millions	Dec. 31, 2021KRW (₩)
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	₩ 47,729
Unrealized finance income	867
Net investment in the lease	46,862
Less than 1 year
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	22,497
1 year ~ 2 year
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	11,124
2 year ~ 3 year
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	10,425
3 year ~ 4 years
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	3,619
4 year ~ 5 year
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	58
More than 5 year
Disclosure of maturity analysis of finance lease payments receivable [line items]
Undiscounted lease payments	₩ 6

Lease - Summary of maturity a_2

Lease - Summary of maturity analysis of operating lease payments (Detail) ₩ in Millions	Dec. 31, 2021KRW (₩)
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	₩ 339,684
Less than 1 year
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	170,575
1 year ~ 2 year
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	113,524
2 year ~ 3 year
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	51,433
3 year ~ 4 years
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	1,409
4 year ~ 5 year
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	808
More than 5 year
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	₩ 1,935

Lease - Additional Information

Lease - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of quantitative information about leases for lessee [abstract]
Cash outflows due to lease payments	₩ 484,879	₩ 459,132	₩ 489,440
Operating lease income	230,140	238,545	168,482
Variable lease payment received	17,686	21,715	25,228
Interest income on lease receivables	₩ 2,053	₩ 2,223	₩ 1,712

Goodwill - Summary of Goodwill

Goodwill - Summary of Goodwill (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Apr. 30, 2020	Dec. 31, 2019
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	₩ 2,072,493	₩ 3,357,524		₩ 2,949,530
Shinsegi Telecom, Inc. [member]
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	1,306,236	1,306,236
SK Broadband Co., Ltd. [member]
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	764,082	764,082	₩ 405,639
Life and Security Holdings Co., Ltd. [member]
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	0	1,176,274
Other acquisitions [member]
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill	₩ 2,175	₩ 110,932

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated impairment [member]
Disclosure of reconciliation of changes in goodwill [line items]
Impairment loss	₩ 33,441	₩ 68,832
Shinsegi Telecom, Inc. [member]
Disclosure of reconciliation of changes in goodwill [line items]
Annual discount rate	6.60%	6.30%
Annual growth rate	0.50%	0.20%
PreTax annual discount rate	9.00%
SK Broadband Co., Ltd. [member]
Disclosure of reconciliation of changes in goodwill [line items]
Annual discount rate	7.10%	6.90%
Annual growth rate	1.00%
PreTax annual discount rate	9.20%

Goodwill - Details of the Chang

Goodwill - Details of the Changes in Goodwill (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of reconciliation of changes in goodwill [abstract]
Beginning balance	₩ 3,357,524	₩ 2,949,530
Acquisition	111,928	408,531
Impairment loss	0	(519)
Other	(43)	(18)
Spin-off	(1,396,916)
Ending balance	₩ 2,072,493	₩ 3,357,524

Intangible Assets - Summary of

Intangible Assets - Summary of Intangible Assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Intangible assets	₩ 3,869,769	₩ 4,436,194	₩ 4,866,092
Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	12,521,692	12,814,796
Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(8,434,681)	(8,121,447)
Accumulated impairment [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(217,242)	(257,155)
Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	2,559,689	1,932,765	2,647,501
Frequency usage rights [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	7,221,735	6,210,882
Frequency usage rights [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(4,476,046)	(4,079,729)
Frequency usage rights [member] | Accumulated impairment [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(186,000)	(198,388)
Land usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	2,732	4,720	7,349
Land usage rights [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	48,318	50,503
Land usage rights [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(45,586)	(45,783)
Industrial rights [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	55,954	71,442	66,824
Industrial rights [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	92,332	116,889
Industrial rights [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(36,342)	(45,300)
Industrial rights [member] | Accumulated impairment [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(36)	(147)
Development costs [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	200	9,364	11,146
Development costs [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	34,393	67,989
Development costs [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(34,193)	(54,771)
Development costs [member] | Accumulated impairment [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	0	(3,854)
Facility usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	17,874	21,880	25,832
Facility usage rights [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	156,062	159,865
Facility usage rights [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(138,188)	(137,985)
Customer relations [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	327,257	919,863	591,371
Customer relations [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	507,581	1,091,146
Customer relations [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(180,324)	(171,283)
Club memberships [Member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	88,494	106,865	80,410
Club memberships [Member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	113,300	139,349
Club memberships [Member] | Accumulated impairment [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(24,806)	(32,484)
Brands [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	0	374,096	374,096
Brands [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	0	374,096
Other [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	817,569	995,199	₩ 1,061,563
Other [member] | Gross amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	4,347,971	4,604,077
Other [member] | Accumulated depreciation and amortization [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	(3,524,002)	(3,586,596)
Other [member] | Accumulated impairment [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets	₩ (6,400)	₩ (22,282)

Intangible Assets - Summary o_2

Intangible Assets - Summary of Intangible Assets (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]
Impairment loss recognised in profit or loss, intangible assets other than goodwill	₩ (147)	₩ (206,569)
Broadcasting rights [member] | Frequency Usage Rights For 800 MHzB [Member]
Disclosure of detailed information about intangible assets [line items]
Impairment loss recognised in profit or loss, intangible assets other than goodwill	227,200	12,388
Broadcasting rights [member] | Frequency Usage Rights For 28GHz B [Member]
Disclosure of detailed information about intangible assets [line items]
Impairment loss recognised in profit or loss, intangible assets other than goodwill		₩ 186,000
Broadcasting rights [member] | Frequency Usage Rights For 1.8 GHz [Member]
Disclosure of detailed information about intangible assets [line items]
Impairment loss recognised in profit or loss, intangible assets other than goodwill	547,800
Broadcasting rights [member] | Frequency Usage Rights For 2.1 GHz [Member]
Disclosure of detailed information about intangible assets [line items]
Impairment loss recognised in profit or loss, intangible assets other than goodwill	₩ 411,700

Intangible Assets - Details of

Intangible Assets - Details of the Changes in Intangible Assets (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]
Beginning balance	₩ 4,436,194	₩ 4,866,092
Acquisition	1,246,386	131,183
Disposal	(15,221)	(51,675)
Transfer	277,608	285,485
Amortization	(1,011,307)	(1,018,657)
Reversal (Impairment)	506
Impairment	(147)	(206,569)
Business combination	9,764	430,335
Spin-off	(1,074,161)
Ending balance	3,869,769	4,436,194
Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	1,932,765	2,647,501
Acquisition	1,145,999
Amortization	(519,075)	(516,348)
Reversal (Impairment)	0
Impairment		(198,388)
Ending balance	2,559,689	1,932,765
Land usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	4,720	7,349
Acquisition	175	550
Disposal	(76)	(100)
Amortization	(2,087)	(3,079)
Ending balance	2,732	4,720
Industrial rights [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	71,442	66,824
Acquisition	5,158	1,836
Disposal	(8)	(513)
Transfer	390	8,281
Amortization	(6,377)	(4,825)
Reversal (Impairment)	(36)
Impairment		(161)
Spin-off	(14,615)
Ending balance	55,954	71,442
Development costs [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	9,364	11,146
Acquisition	1,279	1,141
Disposal	(150)	(294)
Transfer		3,302
Amortization	(3,210)	(4,644)
Reversal (Impairment)	0
Impairment		(1,287)
Spin-off	(7,083)
Ending balance	200	9,364
Facility usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	21,880	25,832
Acquisition	1,690	1,810
Disposal	(21)	(3)
Transfer	328	434
Amortization	(6,003)	(6,193)
Spin-off	0
Ending balance	17,874	21,880
Customer relations [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	919,863	591,371
Acquisition	4,854	2,014
Disposal	(461)	(1,604)
Transfer		491
Amortization	(53,342)	(52,849)
Business combination	4,705	380,440
Spin-off	(548,362)
Ending balance	327,257	919,863
Club memberships [Member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	106,865	80,410
Acquisition	6,518	11,821
Disposal	(9,925)	(35,432)
Transfer		544
Reversal (Impairment)	653
Impairment		(323)
Business combination		49,845
Spin-off	(15,617)
Ending balance	88,494	106,865
Brands [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	374,096	374,096
Spin-off	(374,096)
Ending balance	0	374,096
Other [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	995,199	1,061,563
Acquisition	80,713	112,011
Disposal	(4,580)	(13,729)
Transfer	276,890	272,433
Amortization	(421,213)	(430,719)
Reversal (Impairment)	(111)
Impairment		(6,410)
Business combination	5,059	50
Spin-off	(114,388)
Ending balance	₩ 817,569	₩ 995,199

Intangible Assets - Details o_2

Intangible Assets - Details of the Changes in Intangible Assets (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]
Impairment loss	₩ 147	₩ 206,569
Reversal of impairment loss	₩ 653

Intangible Assets - Research an

Intangible Assets - Research and Development Expenditures Recognized as Expense (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Disclosure of detailed information about intangible assets [abstract]
Research and development costs expensed as incurred	₩ 406,672	₩ 416,445	₩ 391,327

Intangible Assets - Carrying Am

Intangible Assets - Carrying Amount and Residual Useful Lives of Frequency Usage Rights (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 3,869,769	₩ 4,436,194	₩ 4,866,092
Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 2,559,689
800MHz license [Member]
Disclosure of detailed information about intangible assets [line items]
Commencement of amortization	2021-07
Completion of amortization	2026-06
800MHz license [Member] | Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 197,620
Description	LTE service
1.8GHz license [Member]
Disclosure of detailed information about intangible assets [line items]
Commencement of amortization	2021-12
Completion of amortization	2026-12
1.8GHz license [Member] | Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 520,100
Description	LTE service
2.6GHz license [Member]
Disclosure of detailed information about intangible assets [line items]
Commencement of amortization	2016-09
Completion of amortization	2026-12
2.6GHz license [Member] | Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 607,090
Description	LTE service
2.1GHz license [Member]
Disclosure of detailed information about intangible assets [line items]
Commencement of amortization	2021-12
Completion of amortization	2026-12
2.1GHz license [Member] | Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 390,882
Description	W-CDMA and LTE service
3.5GHz license [Member]
Disclosure of detailed information about intangible assets [line items]
Commencement of amortization	2019-04
Completion of amortization	2028-11
3.5GHz license [Member] | Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 833,034
Description	5G service
28GHz license [Member]
Disclosure of detailed information about intangible assets [line items]
Commencement of amortization	2021-01
Completion of amortization	2023-11
28GHz license [Member] | Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Amount	₩ 10,963
Description	5G service

Borrowings and Debentures - Sho

Borrowings and Debentures - Short-term Borrowings (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 12,998	₩ 109,998
2.45% Short Term Borrowings From Citi Bank [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate	2.45%
Short-term borrowings		50,000
Short term borrowings from KEB Hana Bank [member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings		27,000
Borrowings, interest rate basis	FTP 1M +1.01
Borrowings, adjustment to interest rate basis	1.01%
1.59% Short Term Borrowings From KEB Hana Bank [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings		5,000
Borrowings, interest rate basis	6M financial I (bank) + 1.59
Borrowings, adjustment to interest rate basis	1.59%
1.35% Short Term Borrowings From Shinhan Bank [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings		15,000
Borrowings, interest rate basis	6M financial I (bank) + 1.35
Borrowings, adjustment to interest rate basis	1.35%
4.50% Short Term Borrowings From Hana Financial Investment Co Ltd [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate	4.20%
Short-term borrowings	₩ 4,642	4,642
4.50% Short Term Borrowings From DB Financial Investment Co Ltd [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate	4.00%
Short-term borrowings	₩ 2,785	2,785
4.50% Short Term Borrowings From Shinhan Financial Investment Co Ltd [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate	4.20%
Short-term borrowings	₩ 5,571	₩ 5,571

Borrowings and Debentures - S_2

Borrowings and Debentures - Short-term Borrowings (Parenthetical) (Detail)	Dec. 31, 2020
1M FTP rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	1.14%
6M financial 1 rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	0.92%

Borrowings and Debentures - Lon

Borrowings and Debentures - Long-term Borrowings (Detail) ₩ in Millions, SFr in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)	Dec. 31, 2021USD ($)	Dec. 31, 2020KRW (₩)	Dec. 31, 2020USD ($)	Dec. 31, 2020CHF (SFr)	Dec. 31, 2019KRW (₩)
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	₩ 394,187		₩ 2,028,924
Less current installments	(41,065)		(49,663)
Long-term borrowings, excluding current installments	₩ 353,122		1,979,261
Korea Development Bank long-term borrowings with 2.32% interest due December 20, 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 20, 2021
Korea Development Bank long term borrowings with 2.78 % interest due Dec. 21, 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 21, 2022
Long-term borrowings			12,500
Credit Agricole CIB [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 14, 2023
Export Kreditnamnden long-term borrowings with 1.70% interest due April 29, 2022 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	1.70%	1.70%
Maturity	Apr. 29, 2022
Shinhan Bank and others long term borrowings with 3.20% due october 5 2025 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	3.20%	3.20%
Maturity	Oct. 5, 2025
UBS
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	0.00%	0.00%
Maturity	Mar. 28, 2025
FAE
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	0.00%	0.00%
Maturity	May 7, 2025
Korean Development Bank Long Term Borrowings With 1.87% Due Feb. 10, 2026 [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	1.87%	1.87%
Maturity	Feb. 10, 2026
Mizhuo Bank Long Term Borrowings With 1.35% Due May 20, 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	1.35%	1.35%
Maturity	May 20, 2024
DBS Bank Limited Long Term Borrowings With 1.32% Due May 28, 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	1.32%	1.32%
Maturity	May 28, 2024
Gross amount [member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings | $		$ 394,246		$ 2,044,710
Gross amount [member] | Korea Development Bank longterm borrowings with 2.2 % interest due Jul. 30, 2019 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate basis	3M CD + 0.61
Gross amount [member] | Korea Development Bank long term borrowings with 2.2 % interest due Jul. 30, 2019 two [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate basis	3M CD + 0.71
Gross amount [member] | Korea Development Bank long-term borrowings with 2.32% interest due December 20, 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings			12,250
Gross amount [member] | Korea Development Bank long term borrowings with 2.78 % interest due Dec. 21, 2022 [member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings			25,000
Gross amount [member] | Credit Agricole CIB [member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	₩ 25,000		37,500
Borrowings, interest rate basis	3M CD + 0.82
Gross amount [member] | Export Kreditnamnden long-term borrowings with 1.70% interest due April 29, 2022 [member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	₩ 6,746	$ 5,690,000,000	18,726	$ 17,211,000,000
Gross amount [member] | Shinhan Bank and others long term borrowings with 3.20% due october 5 2025 [member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings						₩ 1,950,000
Gross amount [member] | UBS
Disclosure of detailed information about borrowings [line items]
Long-term borrowings			617		SFr 500
Gross amount [member] | FAE
Disclosure of detailed information about borrowings [line items]
Long-term borrowings			617		SFr 500
Gross amount [member] | Korean Development Bank Long Term Borrowings With 1.87% Due Feb. 10, 2026 [Member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	50,000
Gross amount [member] | Mizhuo Bank Long Term Borrowings With 1.35% Due May 20, 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	100,000
Gross amount [member] | DBS Bank Limited Long Term Borrowings With 1.32% Due May 28, 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	200,000
Present value discount [Member]
Disclosure of detailed information about borrowings [line items]
Long-term borrowings	₩ 59		₩ 15,786

Borrowings and Debentures - L_2

Borrowings and Debentures - Long-term Borrowings (Parenthetical) (Detail)	Dec. 31, 2021	Dec. 31, 2020
Korea Development Bank long-term borrowings with 2.32% interest due December 20, 2021.
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	1.29%	0.66%
Korea Development Bank long term borrowings with 2.78 % interest due Dec 21 2022 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	1.29%	0.66%
Credit agricole CIB [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	1.29%	0.66%

Borrowings and Debentures - Deb

Borrowings and Debentures - Debentures (Detail) ₩ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)	Dec. 31, 2021USD ($)	Dec. 31, 2020KRW (₩)	Dec. 31, 2020USD ($)
Disclosure of detailed information about borrowings [line items]
Debentures	₩ 8,426,683		₩ 8,579,743
Less current installments of bonds	(1,389,259)		(889,574)
Debentures, excluding current installments, net	7,037,424		7,690,169
Gross amount [member]
Disclosure of detailed information about borrowings [line items]
Debentures	₩ 8,448,250		8,606,782
Gross amount [member] | Unsecured private bonds with 4.22% interest due 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	4.22%	4.22%
Debentures			190,000
Gross amount [member] | Unsecured private bonds with 3.30% interest due 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	3.30%	3.30%
Debentures	₩ 140,000		140,000
Gross amount [member] | Unsecured private bonds with 3.45% interest due 2032 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2032
Annual interest rate (%)	3.45%	3.45%
Debentures	₩ 90,000		90,000
Gross amount [member] | Unsecured private bonds with 3.03% interest due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	3.03%	3.03%
Debentures	₩ 230,000		230,000
Gross amount [member] | Unsecured private bonds with 3.22% interest due 2033 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2033
Annual interest rate (%)	3.22%	3.22%
Debentures	₩ 130,000		130,000
Gross amount [member] | Unsecured private bonds with 3.64% interest due 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	3.64%	3.64%
Debentures	₩ 150,000		150,000
Gross amount [member] | Unsecured private bonds with 2.66% interest due 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	2.66%	2.66%
Debentures			150,000
Gross amount [member] | Unsecured private bonds with 2.82% interest due 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	2.82%	2.82%
Debentures	₩ 190,000		190,000
Gross amount [member] | Unsecured private bonds with 2.40% interest due 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.40%	2.40%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured private bonds with 2.49% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	2.49%	2.49%
Debentures	₩ 150,000		150,000
Gross amount [member] | Unsecured private bonds with 2.61% interest due 2030 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2030
Annual interest rate (%)	2.61%	2.61%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured private bonds with 2.66% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	2.66%	2.66%
Debentures	₩ 70,000		70,000
Gross amount [member] | Unsecured private bonds with 2.82% interest due 2030 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2030
Annual interest rate (%)	2.82%	2.82%
Debentures	₩ 90,000		90,000
Gross amount [member] | Unsecured private bonds with 2.55% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	2.55%	2.55%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured private bonds with 2.75% interest due 2035 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2035
Annual interest rate (%)	2.75%	2.75%
Debentures	₩ 70,000		70,000
Gross amount [member] | Unsecured private bonds with 1.80% interest due 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	1.80%	1.80%
Debentures			100,000
Gross amount [member] | Unsecured private bonds with 2.08% interest due 2026 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2026
Annual interest rate (%)	2.08%	2.08%
Debentures	₩ 90,000		90,000
Gross amount [member] | Unsecured private bonds with 2.24% interest due 2036 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2036
Annual interest rate (%)	2.24%	2.24%
Debentures	₩ 80,000		80,000
Gross amount [member] | Unsecured private bonds with 1.71% interest due 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	1.71%	1.71%
Debentures			50,000
Gross amount [member] | Unsecured private bonds with 1.97% interest due 2026 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2026
Annual interest rate (%)	1.97%	1.97%
Debentures	₩ 120,000		120,000
Gross amount [member] | Unsecured private bonds with 2.17% interest due 2031 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2031
Annual interest rate (%)	2.17%	2.17%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 2.17% interest due 2022.[member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.17%	2.17%
Debentures	₩ 120,000		120,000
Gross amount [member] | Unsecured corporate bonds with 2.55% interest due 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2027
Annual interest rate (%)	2.55%	2.55%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured corporate bonds with 2.65% interest due 2032 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2032
Annual interest rate (%)	2.65%	2.65%
Debentures	₩ 90,000		90,000
Gross amount [member] | Unsecured corporate bonds with 2.63% interest due 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.63%	2.63%
Debentures	₩ 80,000		80,000
Gross amount [member] | Unsecured private bonds with 2.84% interest due 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2027
Annual interest rate (%)	2.84%	2.84%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured corporate bonds with 2.57% interest due 2021 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	2.57%	2.57%
Debentures			110,000
Gross amount [member] | Unsecured corporate bonds with 2.81% interest due 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	2.81%	2.81%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured corporate bonds with 3 % interest due 2028 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2028
Annual interest rate (%)	3.00%	3.00%
Debentures	₩ 200,000		200,000
Gross amount [member] | Unsecured corporate bonds with 3.2% interest due 2038 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2038
Annual interest rate (%)	3.02%	3.02%
Debentures	₩ 90,000		90,000
Gross amount [member] | Unsecured corporate bonds with 2.1% interest due 2021 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	2.10%	2.10%
Debentures			100,000
Gross amount [member] | Unsecured corporate bonds with 2.33% interest due 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	2.33%	2.33%
Debentures	₩ 150,000		150,000
Gross amount [member] | Unsecured corporate bonds with 2.44% interest due 2038 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2038
Annual interest rate (%)	2.44%	2.44%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 2.03% interest due 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.03%	2.03%
Debentures	₩ 180,000		180,000
Gross amount [member] | Unsecured corporate bonds with 2.09% interest due 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	2.09%	2.09%
Debentures	₩ 120,000		120,000
Gross amount [member] | Unsecured corporate bonds with 2.19% interest due 2029 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2029
Annual interest rate (%)	2.19%	2.19%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 2.23% interest due 2039 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2039
Annual interest rate (%)	2.23%	2.23%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 1.40% interest due 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	1.40%	1.40%
Debentures	₩ 120,000		120,000
Gross amount [member] | Unsecured corporate bonds with 1.49% interest due 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	1.49%	1.49%
Debentures	₩ 60,000		60,000
Gross amount [member] | Unsecured corporate bonds with 1.50% interest due 2029 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2029
Annual interest rate (%)	1.50%	1.50%
Debentures	₩ 120,000		120,000
Gross amount [member] | Unsecured corporate bonds with 1.52% interest due 2039 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2039
Annual interest rate (%)	1.52%	1.52%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 1.56% interest due 2049 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2049
Annual interest rate (%)	1.56%	1.56%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 1.69% interest due 2022 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	1.69%	1.69%
Debentures	₩ 230,000		230,000
Gross amount [member] | Unsecured corporate bonds with 1.76% interest due 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	1.76%	1.76%
Debentures	₩ 70,000		70,000
Gross amount [member] | Unsecured corporate bonds with 1.79% interest due 2029 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2029
Annual interest rate (%)	1.79%	1.79%
Debentures	₩ 40,000		40,000
Gross amount [member] | Unsecured corporate bonds with 1.81% interest due 2039 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2039
Annual interest rate (%)	1.81%	1.81%
Debentures	₩ 60,000		60,000
Gross amount [member] | Unsecured corporate bonds with 1.64% interest due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	1.64%	1.64%
Debentures	₩ 170,000		170,000
Gross amount [member] | Unsecured corporate bonds with 1.75% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	1.75%	1.75%
Debentures	₩ 130,000		130,000
Gross amount [member] | Unsecured corporate bonds with 1.83% interest due 2030 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2030
Annual interest rate (%)	1.83%	1.83%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 1.87% interest due 2040 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2040
Annual interest rate (%)	1.87%	1.87%
Debentures	₩ 70,000		70,000
Gross amount [member] | Unsecured corporate bonds with 1.40% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	1.40%	1.40%
Debentures	₩ 140,000		140,000
Gross amount [member] | Unsecured corporate bonds with 1.59% interest due 2030 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2030
Annual interest rate (%)	1.59%	1.59%
Debentures	₩ 40,000		40,000
Gross amount [member] | Unsecured corporate bonds with 1.76% interest due 2040 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2040
Annual interest rate (%)	1.76%	1.76%
Debentures	₩ 110,000		110,000
Gross amount [member] | Unsecured corporate bonds with 1.77% interest due 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	1.77%	1.77%
Debentures			120,000
Gross amount [member] | Unsecured corporate bonds with 2.26% interest due 2022 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.26%	2.26%
Debentures	₩ 150,000		150,000
Gross amount [member] | Unsecured corporate bonds with 2.70% interest due 2022 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.70%	2.70%
Debentures	₩ 140,000		140,000
Gross amount [member] | Unsecured corporate bonds with 2.59% interest due 2021 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2021
Annual interest rate (%)	2.59%	2.59%
Debentures			70,000
Gross amount [member] | Unsecured corporate bonds with 2.93% interest due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	2.93%	2.93%
Debentures	₩ 80,000		80,000
Gross amount [member] | Unsecured corporate bonds with 2.00% interest due 2022 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	2.00%	2.00%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 2.9% interest due 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	2.09%	2.09%
Debentures	₩ 160,000		160,000
Gross amount [member] | Unsecured corporate bonds with 1.71% interest due 2022 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2022
Annual interest rate (%)	1.71%	1.71%
Debentures	₩ 80,000		80,000
Gross amount [member] | Unsecured corporate bonds with 1.71% interest due 2024 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	1.71%	1.71%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured corporate bonds with 1.86% interest due 2026 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2026
Annual interest rate (%)	1.86%	1.86%
Debentures	₩ 50,000		50,000
Gross amount [member] | Unsecured corporate bonds with 1.48% interest due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	1.48%	1.48%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured corporate bonds with 1.64% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	1.64%	1.64%
Debentures	₩ 100,000		100,000
Gross amount [member] | Unsecured corporate bonds with 1.41% interest due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	1.41%	1.41%
Debentures	₩ 160,000		160,000
Gross amount [member] | Private placement corporate bonds 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Debentures			6,292
Gross amount [member] | Private placement corporate bonds 2023 two [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Debentures			6,222
Gross amount [member] | Private placement corporate bonds 2023 three [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Debentures			6,168
Gross amount [member] | Private placement corporate bonds 2023 four [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Debentures			6,100
Gross amount [member] | Unsecured global bonds with 6.63% interest due 2027 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2027
Annual interest rate (%)	6.63%	6.63%
Debentures	₩ 474,200	$ 400,000	435,200	$ 400,000
Gross amount [member] | Unsecured global bonds with 3.75% interest due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	3.75%	3.75%
Debentures	₩ 592,750	$ 500,000	544,000	500,000
Gross amount [member] | Unsecured global bonds with 3.88% interest due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	2023
Annual interest rate (%)	3.88%	3.88%
Debentures	₩ 355,650	$ 300,000	326,400	300,000
Gross amount [member] | Floating rate notes with LIBOR rate 3M + 0.91% interest due 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2025
Annual interest rate (%)	0.91%	0.91%
Annual interest rate description	LIBOR rate 3M
Debentures	₩ 355,650	$ 300,000	326,400	$ 300,000
Gross amount [member] | Unsecured corporate bonds with 1.17% interest due 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	1.17%	1.17%
Debentures	₩ 80,000
Gross amount [member] | Unsecured corporate bonds with 1.39% interest due 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2026
Annual interest rate (%)	1.39%	1.39%
Debentures	₩ 80,000
Gross amount [member] | Unsecured corporate bonds with 1.80% interest due 2031 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2031
Annual interest rate (%)	1.80%	1.80%
Debentures	₩ 50,000
Gross amount [member] | Unsecured corporate bonds with 1.89% interest due 2041 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2041
Annual interest rate (%)	1.89%	1.89%
Debentures	₩ 100,000
Gross amount [member] | Unsecured corporate bonds with 2.47% interest due 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	2.47%	2.47%
Debentures	₩ 90,000
Gross amount [member] | Unsecured corporate bonds with 2.69% interest due 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2026
Annual interest rate (%)	2.69%	2.69%
Debentures	₩ 70,000
Gross amount [member] | Unsecured corporate bonds with 2.68% interest due 2041 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2041
Annual interest rate (%)	2.68%	2.68%
Debentures	₩ 40,000
Gross amount [member] | Unsecured corporate bonds with 1.69% interest due 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	2024
Annual interest rate (%)	1.69%	1.69%
Debentures	₩ 100,000
Discounts on bonds [member]
Disclosure of detailed information about borrowings [line items]
Debentures	₩ (21,567)		₩ (27,039)

Borrowings and Debentures - D_2

Borrowings and Debentures - Debentures (Parenthetical) (Detail)	Dec. 31, 2021	Dec. 31, 2020
3M LIBOR [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rate (%)	0.21%	0.24%

Long-term Payables Other - Summ

Long-term Payables Other - Summary of Long-term Payables - Other (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Trade and other non-current payables [abstract]
Payables related to acquisition of frequency usage rights	₩ 1,611,010	₩ 1,141,723
Other		631
Other non current payables	₩ 1,611,010	₩ 1,142,354

Long-term Payables Other - Deta

Long-term Payables Other - Details of Long-term Payables - Other, Which Consist of Payables Related to the Acquisition of Frequency Usage Rights (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial liabilities [line items]
Present value discount on long-term payables — other	₩ (80,882)	₩ (59,717)
Current installments of long-term payables — other	(398,823)	(424,600)
Carrying amount at December 31	1,611,010	1,141,723
Gross amount [member]
Disclosure of financial liabilities [line items]
Long-term payables — other	₩ 2,090,715	₩ 1,626,040

Long-term Payables Other - Addi

Long-term Payables Other - Additional Information (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Gross amount [member] | Less than 1 year [member]
Disclosure of financial liabilities [line items]
Payables related to acquisition of frequency usage rights	₩ 425,349	₩ 425,349

Long-term Payables Other - Repa

Long-term Payables Other - Repayment Schedule of the Principal Amount of Long-term Payables - Other Related to Acquisition of Frequency Usage Rights (Detail) - Gross amount [member] - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial liabilities [line items]
Payables related to acquisition of frequency usage rights	₩ 2,090,715	₩ 1,626,040
Less than 1 year [member]
Disclosure of financial liabilities [line items]
Payables related to acquisition of frequency usage rights	400,245
1 - 3 years [Member]
Disclosure of financial liabilities [line items]
Payables related to acquisition of frequency usage rights	769,395
3 - 5 years [Member]
Disclosure of financial liabilities [line items]
Payables related to acquisition of frequency usage rights	738,300
More than 5 years [member]
Disclosure of financial liabilities [line items]
Payables related to acquisition of frequency usage rights	₩ 182,775

Provisions - Changes in Provisi

Provisions - Changes in Provisions (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of other provisions [line items]
Beginning balance	₩ 150,877	₩ 165,161
Increase	15,671	26,266
Utilization	(26,283)	(34,471)
Reversal	(8,076)	(8,629)
Other	172	(205)
Business Combination	385	2,755
Spin-off	(5,751)
Ending balance	126,995	150,877
Current	61,656	69,363
Non-current	65,339	81,514
Provision for restoration [Member]
Disclosure of other provisions [line items]
Beginning balance	113,653	102,519
Increase	12,648	15,616
Utilization	(6,283)	(3,610)
Reversal	(440)	(1,492)
Other	172	(6)
Business Combination		626
Spin-off	(5,019)
Ending balance	114,731	113,653
Current	59,204	42,348
Non-current	55,527	71,305
Emission allowance [Member]
Disclosure of other provisions [line items]
Beginning balance	7,424	5,257
Increase	1,368	7,400
Utilization	(1,091)
Reversal	(5,816)	(5,233)
Ending balance	1,885	7,424
Current	1,885	7,424
Other provisions [Member]
Disclosure of other provisions [line items]
Beginning balance	29,800	57,385
Increase	1,655	3,250
Utilization	(18,909)	(30,861)
Reversal	(1,820)	(1,904)
Other		(199)
Business Combination	385	2,129
Spin-off	(732)
Ending balance	10,379	29,800
Current	567	19,591
Non-current	₩ 9,812	₩ 10,209

Provisions - Changes in Provi_2

Provisions - Changes in Provisions (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Legal Proceedings Provision [member]
Disclosure of other provisions [line items]
Current provisions	₩ 18,717	₩ 18,717

Defined Benefit Liabilities (_3

Defined Benefit Liabilities (Assets) - Details of Defined Benefit Liabilities (Assets) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of defined benefit plans [abstract]
Present value of defined benefit obligations	₩ 1,035,016	₩ 1,278,550
Fair value of plan assets	(1,040,286)	(1,127,163)
Defined benefit assets	(18,427)	(3,557)
Defined benefit liabilities	₩ 13,157	₩ 154,944

Defined Benefit Liabilities (_4

Defined Benefit Liabilities (Assets) - Principal Actuarial Assumptions (Detail)	Dec. 31, 2021	Dec. 31, 2020
Bottom of range [member]
Disclosure of defined benefit plans [line items]
Discount rate for defined benefit obligations	2.35%	1.83%
Expected rate of salary increase	2.00%	2.04%
Top of range [member]
Disclosure of defined benefit plans [line items]
Discount rate for defined benefit obligations	3.29%	3.14%
Expected rate of salary increase	5.29%	6.00%

Defined Benefit Liabilities (_5

Defined Benefit Liabilities (Assets) - Changes in Defined Benefit Obligations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of defined benefit plans [line items]
Current service cost	₩ 186,395	₩ 193,078
Past service cost	0	815
Interest cost	4,067	4,901
Remeasurement
Spin-off	(2,281,910)
Retirement benefit obligation [Member]
Disclosure of defined benefit plans [line items]
Beginning balance	1,278,550	1,136,787
Current service cost	186,395	193,078
Past service cost		815
Interest cost	28,617	25,958
Remeasurement
- Demographic assumption	(794)	2,071
- Financial assumption	(29,399)	(18,266)
- Adjustment based on experience	5,773	17,364
Business combinations		1,742
Benefit paid	(114,897)	(76,987)
Spin-off	(318,476)
Others	(753)	(4,012)
Ending balance	₩ 1,035,016	₩ 1,278,550

Defined Benefit Liabilities (_6

Defined Benefit Liabilities (Assets) - Changes in Plan Assets (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of fair value of plan assets [line items]
Interest income	₩ (4,067)	₩ (4,901)
Spin-off	(2,281,910)
Plan assets [member]
Disclosure of fair value of plan assets [line items]
Beginning balance	1,127,163	965,654
Interest income	24,550	21,057
Remeasurement	(3,798)	(1,385)
Contributions	152,208	213,298
Benefit paid	(100,511)	(68,084)
Business combinations	0	485
Spin-off	(157,522)	0
Others	(1,804)	(3,862)
Ending balance	₩ 1,040,286	₩ 1,127,163

Defined Benefit Liabilities (_7

Defined Benefit Liabilities (Assets) - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of defined benefit plans [abstract]
Expected contributions in 2022	₩ 187,598
Weighted average durations of defined benefit obligations	9 years 2 months 8 days	9 years 5 months 4 days

Defined Benefit Liabilities (_8

Defined Benefit Liabilities (Assets) - Total Amount of Expenses Recognized in Profit and Loss (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of defined benefit plans [abstract]
Current service cost	₩ 186,395	₩ 193,078
Past service cost	0	815
Net interest cost	4,067	4,901
Total amount of expenses recognized in profit and loss	₩ 190,462	₩ 198,794	₩ 175,165

Defined Benefit Liabilities (_9

Defined Benefit Liabilities (Assets) - Details of Plan Assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of defined benefit plans [abstract]
Equity instruments	₩ 25,083	₩ 15,770
Debt instruments	228,534	228,839
Short-term financial instruments, etc.	786,669	882,554
Fair value of plan assets	₩ 1,040,286	₩ 1,127,163

Defined Benefit Liabilities _10

Defined Benefit Liabilities (Assets) - Effects on Defined Benefit Obligations if Each of Significant Actuarial Assumptions Changes Within Expectable and Reasonable Range (Detail) ₩ in Millions	Dec. 31, 2021KRW (₩)
Discount rate [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase in defined benefit obligations	₩ (43,702)
Increase in assumption	0.50%
Decrease in defined benefit obligations	₩ 47,870
Decrease in assumption	0.50%
Expected salary increase rate [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase in defined benefit obligations	₩ 47,552
Increase in assumption	0.50%
Decrease in defined benefit obligations	₩ (43,940)
Decrease in assumption	0.50%

Derivative Instruments - Curren

Derivative Instruments - Currency and Interest Rate Swap Contracts under Cash Flow Hedge Accounting (Detail)	12 Months Ended
	Dec. 31, 2021
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member]
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Jul. 20, 2007
Hedged risk	Foreign currency risk
Financial institution	Morgan Stanley and four other banks
Duration of contract	Jul. 20, 2007 ~ Jul. 20, 2027
Fixed-to-fixed cross currency swap, Dec.16, 2013 [member]
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Dec. 16, 2013
Hedged risk	Foreign currency risk
Financial institution	Deutsche bank
Duration of contract	Dec.16, 2013 ~ Apr. 29, 2022
Fixed-to-fixed cross currency swap, Apr. 16, 2018 [member]
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Apr. 16, 2018
Hedged risk	Foreign currency risk
Financial institution	The Export-Import Bank of Korea and three other banks
Duration of contract	Apr. 16, 2018 ~ Apr. 16, 2023
Floating-to-fixed interest rate swap, Mar. 4, 2020
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Mar. 4, 2020
Hedged risk	Foreign currency risk and Interest rate risk
Financial institution	Citibank
Duration of contract	Mar.4, 2020 ~ Jun. 4, 2025
Fixed-to-fixed cross currency swap, Aug. 13, 2018 [member]
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Aug. 13, 2018
Hedged risk	Foreign currency risk
Financial institution	Citibank
Duration of contract	Aug. 13, 2018 ~ Aug. 13, 2023
Floating-to-fixed interest rate swap, Dec. 21, 2017 [member]
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Dec. 21, 2017
Hedged risk	Interest rate risk
Financial institution	Korea Development Bank
Duration of contract	Dec. 21, 2017 ~ Dec. 21, 2022
Floating-to-fixed interest rate swap, Dec. 19, 2018 [member]
Disclosure of detailed information about hedging instruments [line items]
Borrowing date	Dec. 19, 2018
Hedged risk	Interest rate risk
Financial institution	Credit Agricole CIB
Duration of contract	Mar.19, 2019 ~ Dec.14, 2023

Derivative Instruments - Curr_2

Derivative Instruments - Currency and Interest Rate Swap Contracts under Cash Flow Hedge Accounting (Parenthetical) (Detail) ₩ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)	Dec. 31, 2021USD ($)	Dec. 31, 2020KRW (₩)
Disclosure of detailed information about hedging instruments [line items]
Derivative financial liabilities	₩ 321,136		₩ 375,160
Derivative financial assets	217,594		164,695
Current derivative financial assets	30,110		8,704
Non-current derivative financial assets	187,484		155,991
Newberry Global Limited [Member]
Disclosure of detailed information about hedging instruments [line items]
Derivative financial assets	15,477		9,524
SK Broadband Co., Ltd. [member]
Disclosure of detailed information about hedging instruments [line items]
Derivative financial liabilities	₩ 321,025		320,984
Projected discounted cash flow percentage	7.10%
SK Broadband Co., Ltd. [Member]
Disclosure of detailed information about hedging instruments [line items]
Current derivative financial assets	₩ 4,682
Non-current derivative financial assets	2,306
Total return swaps [member]
Disclosure of detailed information about hedging instruments [line items]
Lease contract amount	270,000		₩ 64,000
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member]
Disclosure of detailed information about hedging instruments [line items]
Bonds face value | $		$ 400,000
Fixed-to-fixed cross currency swap, Dec.16, 2013 [member]
Disclosure of detailed information about hedging instruments [line items]
Bonds face value | $		5,690
Fixed-to-fixed cross currency swap, Apr. 16, 2018 [member]
Disclosure of detailed information about hedging instruments [line items]
Bonds face value | $		500,000
Floating-to-fixed interest rate swap, Mar. 4, 2020
Disclosure of detailed information about hedging instruments [line items]
Bonds face value | $		300,000
Fixed-to-fixed cross currency swap, Aug. 13, 2018 [member]
Disclosure of detailed information about hedging instruments [line items]
Bonds face value | $		$ 300,000
Floating-to-fixed interest rate swap, Dec. 21, 2017 [member]
Disclosure of detailed information about hedging instruments [line items]
Bonds face value	12,500
Floating-to-fixed interest rate swap, Dec. 19, 2018 [member]
Disclosure of detailed information about hedging instruments [line items]
Bonds face value	₩ 25,000

Derivative Instruments - Detail

Derivative Instruments - Details of Fair Values of the Above Derivatives Recorded in Assets or Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about hedged items [line items]
Short-term derivative financial assets	₩ 30,110	₩ 8,704
Long-term derivative financial assets	187,484	155,991
Short-term derivative financial liabilities	52	77
Long-term derivative financial liabilities	(321,084)	(375,083)
Derivative financial liabilities	(321,136)	₩ (375,160)
Cash flow hedge [member]
Disclosure of detailed information about hedged items [line items]
Derivative financial assets	182,661
Derivative financial liabilities	(111)
Fair value [member]
Disclosure of detailed information about hedged items [line items]
Derivative financial assets	182,661
Derivative financial liabilities	(111)
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member] | Cash flow hedge [member]
Disclosure of detailed information about hedged items [line items]
Short-term derivative financial assets	427
Long-term derivative financial assets	74,555
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Short-term derivative financial assets	427
Long-term derivative financial assets	74,555
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member] | Cash flow hedge [member]
Disclosure of detailed information about hedged items [line items]
Long-term derivative financial assets	75,069
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Long-term derivative financial assets	75,069
Fixed to fixed Cross Currency Swap Three [member] | Cash flow hedge [member]
Disclosure of detailed information about hedged items [line items]
Long-term derivative financial assets	30,150
Fixed to fixed Cross Currency Swap Three [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Long-term derivative financial assets	30,150
Floating-to-fixed interest rate swap, Dec. 20, 2016 [member] | Cash flow hedge [member]
Disclosure of detailed information about hedged items [line items]
Short-term derivative financial liabilities	(52)
Long-term derivative financial liabilities	(59)
Floating-to-fixed interest rate swap, Dec. 20, 2016 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Short-term derivative financial liabilities	(52)
Long-term derivative financial liabilities	(59)
Floating-to-fixed cross currency interest rate swap, Mar. 7, 2013 [member] | Cash flow hedge [member]
Disclosure of detailed information about hedged items [line items]
Long-term derivative financial assets	2,460
Floating-to-fixed cross currency interest rate swap, Mar. 7, 2013 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Long-term derivative financial assets	₩ 2,460

Derivative Instruments - Deta_2

Derivative Instruments - Details of Fair Values of the Above Derivatives Recorded in Assets or Liabilities (Parenthetical) (Detail) - Dec. 31, 2021 ₩ in Millions, $ in Millions	USD ($)	KRW (₩)
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	$ 400,000
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	5,690
Fixed-to-fixed cross currency swap, Jul. 20, 2007 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	400,000
Fixed-to-fixed cross currency swap, Dec.16, 2013 [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	5,690
Fixed-to-fixed cross currency swap, Dec.16, 2013 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	300,000
Floating-to-fixed interest rate swap, Dec. 20, 2016 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value | ₩		₩ 25,000
Floating-to-fixed interest rate swap, Dec. 21, 2017 [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value | ₩		12,500
Floating-to-fixed interest rate swap, Dec. 21, 2017 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value | ₩		₩ 12,500
Floating-to-fixed cross currency interest rate swap, Mar. 7, 2013 [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	300,000
Fixed to fixed Cross Currency Swap Three [member] | Fair value [member]
Disclosure of detailed information about hedged items [line items]
Bonds face value	$ 500,000

Derivative Instruments - Deta_3

Derivative Instruments - Detailed information about f financial instruments under cash flow hedge (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Derivative financial current assets	₩ 30,110	₩ 8,704
Non-current assets:
Derivative financial Non-current assets	187,484	155,991
Derivative financial assets	217,594	164,695
Non-current liabilities:
Derivative financial Non-current liabilities	321,084	₩ 375,083
Fair value
Non-current assets:
Derivative financial assets	34,933
Held For Trading
Non-current assets:
Derivative financial assets	34,933
Contingent subscription right [member] | Fair value
Current assets:
Derivative financial current assets	9,524
Contingent subscription right [member] | Held For Trading
Current assets:
Derivative financial current assets	9,524
Total return swap [member] | Fair value
Current assets:
Derivative financial current assets	4,682
Non-current assets:
Derivative financial Non-current assets	5,250
Total return swap [member] | Held For Trading
Current assets:
Derivative financial current assets	4,682
Non-current assets:
Derivative financial Non-current assets	5,250
Subscription right [member] | Fair value
Current assets:
Derivative financial current assets	15,477
Subscription right [member] | Held For Trading
Current assets:
Derivative financial current assets	15,477
Share option | Fair value
Non-current liabilities:
Derivative financial Non-current liabilities	(321,025)
Share option | Held For Trading
Non-current liabilities:
Derivative financial Non-current liabilities	₩ (321,025)

Share Capital and Capital Sur_3

Share Capital and Capital Surplus and Others - Number of Authorized, Issued and Outstanding Common Shares and the Details of Capital Surplus (Deficit) and Others (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [abstract]
Number of authorized shares	670,000,000	220,000,000
Par value (in won)(*1)	₩ 100	₩ 500
Number of issued shares	218,833,144	80,745,711	80,745,711
Share capital:
Common share	₩ 30,493	₩ 44,639
Capital surplus and others:
Paid-in surplus	1,771,000	2,915,887
Treasury shares (note 24)	(57,314)	(2,123,661)
Hybrid bonds(Note 25)	398,759	398,759
Share option (note 26)	47,166	1,481
Others	(13,783,337)	(515,263)
Capital Surplus	₩ (11,623,726)	₩ 677,203

Share Capital and Capital Sur_4

Share Capital and Capital Surplus and Others - Number of Authorized, Issued and Outstanding Common Shares and the Details of Capital Surplus (Deficit) and Others (Parenthetical) (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Number of shares issued	218,833,144	80,745,711	80,745,711
Par value per share	₩ 100	₩ 500
Increase Decrease In Equity	₩ 14,146
Stockholders equity note spinoff transactions	₩ 13,340,037
Bottom of range [member]
Disclosure of classes of share capital [line items]
Number of shares issued	220,000,000
Par value per share	₩ 100
Top of range [member]
Disclosure of classes of share capital [line items]
Number of shares issued	670,000,000
Par value per share	₩ 500
Parent [member]
Disclosure of classes of share capital [line items]
Number Of Treasury Shares Retired During The Period	8,685,568

Share Capital and Capital Sur_5

Share Capital and Capital Surplus and Others - Summary of Reconciliation of Number of Shares Outstanding (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of classes of share capital [line items]
Issued shares at January 1	80,745,711	80,745,711
Retirement of treasury shares	(8,685,568)	0
Stock split	288,240,572	0
Spin-off	(141,467,571)	0
Issued shares at December 31	218,833,144	80,745,711

Share Capital and Capital Sur_6

Share Capital and Capital Surplus and Others - Summary of Reconciliation of Number of Shares Outstanding (Parenthetical) (Detail) - ₩ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of classes of share capital [line items]
Par value per share	₩ 100	₩ 500
Parent [member]
Disclosure of classes of share capital [line items]
Number Of Treasury Shares Retired During The Period	8,685,568
Bottom of range [member]
Disclosure of classes of share capital [line items]
Par value per share	₩ 100
Top of range [member]
Disclosure of classes of share capital [line items]
Par value per share	₩ 500

Share Capital and Capital Sur_7

Share Capital and Capital Surplus and Others - Summary of Allocation of New Shares to Shareholders (Detail) - ₩ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of Allocation of New Shares to Shareholders [Line Items]
Par value per share	₩ 100	₩ 500
SK Square Co., Ltd [Member]
Disclosure of Allocation of New Shares to Shareholders [Line Items]
Name of reporting entity or other means of identification	SK Square Co., Ltd.
Par value per share	₩ 0.3926375
SKTelecomCo.,Ltd [Member]
Disclosure of Allocation of New Shares to Shareholders [Line Items]
Name of reporting entity or other means of identification	SK Telecom Co., Ltd.
Par value per share	₩ 0.6073625

Share Capital and Capital Sur_8

Share Capital and Capital Surplus and Others - Details of Shares Outstanding (Detail) - shares	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Reconciliation of number of shares outstanding [abstract]
Issued shares	218,833,144		80,745,711		80,745,711
Treasury shares	1,250,992		9,418,558		7,609,263
Outstanding shares	217,582,152	356,635,765	71,327,153	365,682,240

Treasury Shares - Summary of Tr

Treasury Shares - Summary of Treasury Shares (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [abstract]
Number of shares	1,250,992	9,418,558	7,609,263
Acquisition cost	₩ 57,314	₩ 2,123,661

Treasury Shares - Summary of ch

Treasury Shares - Summary of changes in treasury shares (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of Changes in treasury shares [Abstract]
Treasury shares at January 1	9,418,558	7,609,263
Acquisition	288,000	1,809,295
Disposal	(626,740)	0
Retirement of treasury shares	(8,685,568)	0
Stock split	1,577,000	0
Spin-off	(719,955)	0
Disposal	(303)	0
Treasury shares at December 31	1,250,992	9,418,558

Treasury Shares - Summary of _2

Treasury Shares - Summary of changes in treasury shares (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Changes in treasury shares [Line Items]
Retirement of treasury shares	(8,685,568)	0
Acquisition	54,032
Acquisition cost	₩ 3,129
Distribution of treasury shares	303
Proceeds from sale or issue of treasury shares	₩ 14		₩ 300,000
Gain on disposal of treasury shares and others	14
Payment to acquire treasury shares	76,111	₩ 426,664
Bonus payment to employees [Member]
Disclosure of Changes in treasury shares [Line Items]
Gain on disposal of treasury shares and others		₩ 114,359
Increase (decrease) through treasury share transactions, equity	141,342
Gain loss on disposal treasury share	₩ 2,659
Increase Decrease through contributions by owners, shares	626,240
Compensation to non executive directors [Member]
Disclosure of Changes in treasury shares [Line Items]
Increase (decrease) through treasury share transactions, equity	₩ 113
Gain loss on disposal treasury share	₩ 48
Increase Decrease through contributions by owners, shares	500
Kako Co Ltd [Member]
Disclosure of Changes in treasury shares [Line Items]
Number of share acquired	288,000	1,809,295
Payment to acquire treasury shares	₩ 72,982	₩ 426,664
SK Telecom Co., Ltd
Disclosure of Changes in treasury shares [Line Items]
Retirement of treasury shares	8,685,568
SK Square Co., Ltd
Disclosure of Changes in treasury shares [Line Items]
Number of shares in entity held by entity or by its subsidiaries or associates	773,987

Hybrid Bonds - Summary of Hybri

Hybrid Bonds - Summary of Hybrid Bonds (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Series hybrid bonds	₩ 398,759	₩ 398,759
Series 2-1 hybrid bonds [member]
Type	Unsecured subordinated bearer bond
Issuance date	Jun. 7, 2018
Maturity	June 7, 2078
Annual interest rate(%)	3.70%
Series hybrid bonds	₩ 300,000	300,000
Series 2-2 hybrid bonds [member]
Type	Unsecured subordinated bearer bond
Issuance date	Jun. 7, 2018
Maturity	June 7, 2078
Annual interest rate(%)	3.65%
Series hybrid bonds	₩ 100,000	100,000
Issuance costs [Member]
Series hybrid bonds	₩ (1,241)	₩ (1,241)

Hybrid Bonds - Summary of Hyb_2

Hybrid Bonds - Summary of Hybrid Bonds (Parenthetical) (Detail) - Private hybrid bonds [Member]	12 Months Ended
	Dec. 31, 2021
After 10 years [Member]
Annual interest rate, additional premium	0.25%
Annual interest rate, additional premium period	10 years
After 25 years [Member]
Annual interest rate, additional premium	0.75%
Annual interest rate, additional premium period	25 years

Share based payment arrangeme_3

Share based payment arrangement - Summary of Terms and Conditions Related to Grants of Share Based Payment Arrangement (Detail)	12 Months Ended
	Dec. 31, 2021shares₩ / shares
Series 1-1 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares | shares	67,320
Exercise price | ₩ / shares	₩ 49,350
Exercise period	Mar. 25, 2019 ~ Mar. 24, 2022
Vesting conditions	2 years’ service from the grant date
Series 1-2 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	March 24, 2017
Grant method	Reissue of treasury shares, cash settlement
Number of shares | shares	67,320
Exercise price | ₩ / shares	₩ 53,298
Exercise period	Mar. 25, 2020 ~ Mar. 24, 2023
Vesting conditions	3 years’ service from the grant date
Series 1-3 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares | shares	67,320
Exercise price | ₩ / shares	₩ 57,562
Exercise period	Mar. 25, 2021 ~ Mar. 24, 2024
Vesting conditions	4 years’ service from the grant date
Series 2 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	February 20, 2018
Types of shares to be issued	Registered common shares
Number of shares | shares	4,124
Exercise price | ₩ / shares	₩ 50,824
Exercise period	Feb. 21, 2020 ~ Feb. 20, 2023
Vesting conditions	2 years’ service from the grant date
Series 3 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	February 22, 2019
Number of shares | shares	12,685
Exercise price | ₩ / shares	₩ 53,052
Exercise period	Feb. 23, 2021 ~ Feb. 22, 2024
Vesting conditions	2 years’ service from the grant date
Series 4 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	March 26, 2019
Number of shares | shares	5,266
Exercise price | ₩ / shares	₩ 50,862
Exercise period	Mar. 27, 2021 ~ Mar. 26, 2024
Vesting conditions	2 years’ service from the grant date
Series 5 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	March 26, 2020
Number of shares | shares	381,937
Exercise price | ₩ / shares	₩ 38,452
Exercise period	Mar. 27, 2023 ~ Mar. 26, 2027
Vesting conditions	3 years’ service from the grant date
Series 6 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	March 25, 2021
Number of shares | shares	94,657
Exercise price | ₩ / shares	₩ 50,276
Exercise period	Mar. 26, 2023 ~ Mar. 25, 2026
Vesting conditions	2 years’ service from the grant date
Cash settled share based payment arrangement [Member] | Share Appreciation Rights Of SK Telecom Co., Ltd. [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date	January 1, 2021
Grant method	Cash settlement
Number of shares | shares	224,692
Exercise price | ₩ / shares	₩ 50,276
Exercise period	Jan. 1, 2023 ~ Mar. 28, 2024
Vesting conditions	2 years’ service from the grant date
Cash settled share based payment arrangement [Member] | Share Appreciation Rights of SK Square Co., Ltd. [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant method	Cash settlement
Number of shares | shares	145,247
Exercise price | ₩ / shares	₩ 50,276
Exercise period	Jan. 1, 2023 ~ Mar. 28, 2024
Vesting conditions	2 years’ service from the grant date

Share based payment arrangeme_4

Share based payment arrangement - Summary of Share Compensation Expense Recognized (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure Of Share Based Compensation Expense [line items]
Share compensation expense	₩ 170,529	₩ 7,589
Major Share Options Transactions [member]
Disclosure Of Share Based Compensation Expense [line items]
Share compensation expense	87,622
Events including and after reporting period [member]
Disclosure Of Share Based Compensation Expense [line items]
Share compensation expense	₩ 75,318

Share based payment arrangeme_5

Share based payment arrangement - Summary of Inputs Used in Binomial Option Pricing Model (Detail) ₩ / shares in Units, ₩ in Millions	Nov. 01, 2021KRW (₩)mo	Dec. 31, 2021KRW (₩)yr₩ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated option's life | mo	6
Per share fair value of the option | ₩	₩ 300,500
Series 1-1 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.86%
Estimated option's life | yr		5
Share price (Closing price on the preceding day)		₩ 52,500
Expected volatility		13.38%
Expected dividends		3.80%
Exercise price		₩ 49,350
Per share fair value of the option | ₩		₩ 5,403
Series 1-2 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.95%
Estimated option's life | yr		6
Share price (Closing price on the preceding day)		₩ 52,500
Expected volatility		13.38%
Expected dividends		3.80%
Exercise price		₩ 53,298
Per share fair value of the option | ₩		₩ 4,048
Series 1-3 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		2.07%
Estimated option's life | yr		7
Share price (Closing price on the preceding day)		₩ 52,500
Expected volatility		13.38%
Expected dividends		3.80%
Exercise price		₩ 57,562
Per share fair value of the option | ₩		₩ 3,096
Series 2 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		2.63%
Estimated option's life | yr		5
Share price (Closing price on the preceding day)		₩ 48,700
Expected volatility		16.45%
Expected dividends		3.70%
Exercise price		₩ 50,824
Per share fair value of the option | ₩		₩ 4,798
Series 3 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.91%
Estimated option's life | yr		5
Share price (Closing price on the preceding day)		₩ 51,800
Expected volatility		8.30%
Expected dividends		3.80%
Exercise price		₩ 53,052
Per share fair value of the option | ₩		₩ 1,720
Series 4 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.78%
Estimated option's life | yr		5
Share price (Closing price on the preceding day)		₩ 50,600
Expected volatility		7.70%
Expected dividends		3.90%
Exercise price		₩ 50,862
Per share fair value of the option | ₩		₩ 1,622
Series 5 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.52%
Estimated option's life | yr		7
Share price (Closing price on the preceding day)		₩ 34,900
Expected volatility		8.10%
Expected dividends		5.70%
Exercise price		₩ 38,452
Per share fair value of the option | ₩		₩ 192
Series 6 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.55%
Estimated option's life | yr		5
Share price (Closing price on the preceding day)		₩ 49,800
Expected volatility		25.70%
Expected dividends		4.00%
Exercise price		₩ 50,276
Per share fair value of the option | ₩		₩ 8,142
Share Appreciation Rights Of SK Telecom Co., Ltd. [Member] | Cash-settled share-based payment arrangement
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.71%
Estimated option's life | yr		3.25
Share price (Closing price on the preceding day)		₩ 57,900
Expected volatility		26.00%
Expected dividends		3.40%
Exercise price		₩ 50,276
Per share fair value of the option | ₩		₩ 10,646
Share Appreciation Rights of SK Square Co., Ltd. [Member] | Cash-settled share-based payment arrangement
Disclosure of terms and conditions of share-based payment arrangement [line items]
Risk-free interest rate		1.71%
Estimated option's life | yr		3.25
Share price (Closing price on the preceding day)		₩ 66,400
Expected volatility		26.00%
Expected dividends		0.00%
Exercise price		₩ 50,276
Per share fair value of the option | ₩		₩ 20,321

Share based payment arrangeme_6

Share based payment arrangement - Additional Information (Detail) ₩ in Millions	Nov. 01, 2021KRW (₩)moshares	Oct. 12, 2021shares	Dec. 31, 2021KRW (₩)shares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of share options granted | shares		505,350	0
Option life, share options granted | mo	6
Weighted average fair value at measurement date, share options granted	₩ 300,500
Borrowings			₩ 1,774
Number of share options transferred | shares	7,700
Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expense from share-based payment transactions	₩ 9,935
Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expense from share-based payment transactions	₩ 151,858

Retained Earnings - Summary of

Retained Earnings - Summary of Retained Earnings (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of reserves within equity [abstract]
Legal reserve	₩ 22,320	₩ 22,320
Reserve for business expansion	11,631,138	11,631,138
Reserve for technology development	4,365,300	4,365,300
Appropriated retained earnings	15,996,438	15,996,438
Unappropriated retained earnings	6,418,583	6,963,155
Retained earnings	₩ 22,437,341	₩ 22,981,913

Retained Earnings - Additional

Retained Earnings - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021
Disclosure of reserves within equity [abstract]
Legal reserve as a percentage of cash dividends paid	10.00%
Legal reserve as a percentage of outstanding share capital	50.00%

Reserves - Details of Reserves,

Reserves - Details of Reserves, Net of Taxes (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reserves within equity [abstract]
Valuation gain on FVOCI	₩ 633,240	₩ 438,979
Other comprehensive gain (loss) of investments in associates and joint ventures	53,770	(392,333)
Valuation gain on derivatives	33,918	17,615
Foreign currency translation differences for foreign operations	14,310	(24,122)
Total reserves, net of taxes	₩ 735,238	₩ 40,139	₩ (329,576)

Reserves - Changes in Reserves

Reserves - Changes in Reserves (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of reserves within equity [Line Items]
Balance at January 1	₩ 40,139	₩ (329,576)
Changes, net of taxes	695,099	369,715
Balance at December 31	735,238	40,139
Restated balance [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		40,139
Valuation gain (loss) on financial assets at FVOCI [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1	438,979	(47,086)
Changes, net of taxes	194,261	486,065
Balance at December 31	633,240	438,979
Valuation gain (loss) on financial assets at FVOCI [member] | Restated balance [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		438,979
Other comprehensive loss of investments in associates [Member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		(278,142)
Changes, net of taxes	446,103	(114,191)
Balance at December 31	53,770
Other comprehensive loss of investments in associates [Member] | Restated balance [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		(392,333)
Valuation gain (loss) on derivatives [Member]
Disclosure of reserves within equity [Line Items]
Balance at January 1	17,615	(920)
Changes, net of taxes	16,303	18,535
Balance at December 31	33,918	17,615
Valuation gain (loss) on derivatives [Member] | Restated balance [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		17,615
Foreign currency translation differences for foreign operations [Member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		(3,428)
Changes, net of taxes	38,432	(20,694)
Balance at December 31	₩ 14,310
Foreign currency translation differences for foreign operations [Member] | Restated balance [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1		₩ (24,122)

Reserves - Changes In Valuation

Reserves - Changes In Valuation Gain (Loss) On Financial Assets At FVOCI (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of reserves within equity [Line Items]
Balance at January 1	₩ 40,139	₩ (329,576)
Balance at December 31	735,238	40,139
Valuation gain (loss) on financial assets at FVOCI [member]
Disclosure of reserves within equity [Line Items]
Balance at January 1	438,979	(47,086)
Amount recognized as other comprehensive income for the year, net of taxes	627,833	486,440
Amount reclassified to retained earnings, net of taxes	(12,429)	(375)
Changes from spin-off, net of taxes	(421,143)	0
Balance at December 31	₩ 633,240	₩ 438,979

Reserves - Changes in Valuati_2

Reserves - Changes in Valuation Gain (Loss) on Derivatives (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of reserves within equity [Line Items]
Balance at January 1	₩ 40,139	₩ (329,576)
Balance at December 31	735,238	40,139
Valuation gain (loss) on derivatives [Member]
Disclosure of reserves within equity [Line Items]
Balance at January 1	17,615	(920)
Amount recognized as other comprehensive income for the year, net of taxes	9,731	15,414
Amount reclassified to profit, net of taxes	6,572	3,121
Balance at December 31	₩ 33,918	₩ 17,615

Other Operating Income and Ex_3

Other Operating Income and Expenses - Details of Other Operating Income and Expenses (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Operating Income:
Gain on disposal of property and equipment and intangible assets	₩ 40,109	₩ 35,644	₩ 8,533
Other operating income	115,763	95,751	95,583
Other Operating Expenses:
Research and development	406,672	416,445		₩ 391,327
Bad debt for accounts receivable - trade	31,546	48,625	28,841
Loss on disposal of property and equipment and intangible assets	47,369	41,598	47,760
Impairment loss on property and equipment and intangible assets	3,135	208,833	65,935
Other operating expenses	1,431,587	1,658,362	1,410,288
Parent Company [Member]
Other Operating Income:
Gain on disposal of property and equipment and intangible assets	39,136	34,625	7,755
Others	76,627	61,126	87,828
Other operating income	115,763	95,751	95,583
Other Operating Expenses:
Communication	32,462	34,462	32,986
Utilities	350,678	336,187	315,129
Taxes and dues	33,935	34,577	38,688
Repair	425,606	399,376	368,620
Research and development	347,711	353,198	324,052
Training	31,761	33,384	32,581
Bad debt for accounts receivable - trade	29,402	45,002	25,376
Travel	7,813	7,534	20,717
Supplies and other	101,656	105,333	104,943
Loss on disposal of property and equipment and intangible assets	28,158	25,633	23,821
Impairment loss on property and equipment and intangible assets	3,135	200,705	42,823
Donations	12,800	16,051	16,782
Bad debt for accounts receivable - other	3,995	6,640	3,594
Others	22,475	60,280	60,176
Other operating expenses	₩ 1,431,587	₩ 1,658,362	₩ 1,410,288

Finance Income and Costs - Deta

Finance Income and Costs - Details of Finance Income and Costs (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance Income:
Interest income	₩ 36,708	₩ 37,030	₩ 48,605
Gain on sale of accounts receivable — other	27,725	22,605	15,855
Dividends	12,039	1,170	10,011
Gain on foreign currency transactions	10,987	9,029	8,836
Gain on foreign currency translations	10,753	8,928	4,576
Gain relating to financial instruments at FVTPL	60,169	62,963	34,321
Finance income	155,133	140,685	121,692
Finance Costs:
Interest expense	342,342	399,176	406,087
Loss on sale of accounts receivable — other	0	0	5,823
Loss on foreign currency transactions	12,270	11,053	10,038
Loss on foreign currency translations	8,005	12,730	4,948
Loss on disposal of long-term investment securities	0	98	0
Loss relating to financial instruments at FVTPL	16,833	13,847	8,144
Finance costs	315,604	322,943	334,912
Parent Company [Member]
Finance Income:
Gain on foreign currency translations	7,505	7,888	4,064
Finance income	202,550	241,196	142,155
Finance Costs:
Interest expense	279,737	288,972	306,665
Loss on foreign currency translations	6,764	8,973	4,242
Finance costs	₩ 585,427	₩ 497,193	₩ 437,955

Finance Income and Costs - De_2

Finance Income and Costs - Details of Interest Income Included in Finance Income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Analysis of income and expense [abstract]
Interest income on cash equivalents and financial instruments	₩ 16,141	₩ 24,378	₩ 29,854
Interest income on loans and others	27,709	25,979	33,725
Interest income	₩ 43,850	₩ 50,357	₩ 63,579

Finance Income and Costs - De_3

Finance Income and Costs - Details of Interest Expenses Included in Finance Income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Analysis of income and expense [abstract]
Interest expense on borrowings	₩ 66,188	₩ 116,397	₩ 104,991
Interest expense on debentures	224,144	225,309	224,765
Others	52,010	57,470	76,331
Interest expense	₩ 342,342	₩ 399,176	₩ 406,087

Finance Income and Costs - Fina

Finance Income and Costs - Finance Income and Costs by Category of Financial Instruments (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [Line items]
Finance income	₩ 155,133	₩ 140,685	₩ 121,692
Finance costs	315,604	322,943	334,912
Derivatives designated as hedging instrument	16,133	19,138	40,681
Other comprehensive income for the year, net of taxes	1,362,192	461,822	1,009
Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	202,550	241,196	142,155
Finance costs	585,427	497,193	437,955
Financial assets, class [member]
Disclosure of detailed information about financial instruments [Line items]
Financial assets at FVOCI	920,871	579,678	(17,943)
Derivatives designated as hedging instrument	15,427	24,320	41,305
Other comprehensive income for the year, net of taxes	936,298	603,998	23,362
Financial assets, class [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	201,943	227,382	141,996
Finance costs	222,380	82,194	31,065
Financial liabilities, class [member]
Disclosure of detailed information about financial instruments [Line items]
Derivatives designated as hedging instrument	706	(5,182)	(624)
Financial liabilities, class [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	607	13,814	159
Finance costs	363,047	414,999	406,890
Financial instruments [member]
Disclosure of detailed information about financial instruments [Line items]
Other comprehensive income for the year, net of taxes	937,004	598,816	22,738
Financial assets at fair value through profit or loss [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	149,590	180,254	79,529
Finance costs	67,503	10,894	13,577
Financial liabilities at fair value through profit or loss [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	0		56
Finance costs	8,036	12,115	43
Financial liabilities measured at amortised cost [Member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	607	6,434	103
Finance costs	355,011	400,678	406,206
Derivatives hedging instrument [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income		7,380
Finance costs		2,206	641
Financial assets at FVOCI [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	3,413	993	9,924
Finance costs	142,015	44,832
Financial assets at amortised cost, class [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	48,940	46,135	52,543
Finance costs	12,262	24,601	₩ 17,488
Derivatives designated as hedging instrument [member] | Parent Company [Member]
Disclosure of detailed information about financial instruments [Line items]
Finance income	0
Finance costs	₩ 600	₩ 1,867

Finance Income and Costs - De_4

Finance Income and Costs - Details of Impairment Losses for Financial Assets (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [Line items]
Impairment losses for financial assets	₩ 37,547	₩ 59,184	₩ 34,643
Accounts receivable - trade [member]
Disclosure of detailed information about financial instruments [Line items]
Impairment losses for financial assets	31,546	48,625	28,841
Other receivables [member]
Disclosure of detailed information about financial instruments [Line items]
Impairment losses for financial assets	₩ 6,001	₩ 10,559	₩ 5,802

Income Tax Expense - Summary of

Income Tax Expense - Summary of Income Tax Expenses (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current tax expense:
Current year	₩ 319,539	₩ 286,717	₩ 105,859
Current tax of prior years	705	14,536	(6,855)
Current tax expense	320,244	301,253	99,004
Deferred tax expense:
Changes in net deferred tax assets	331,704	75,249	201,264
Income tax expense
Tax expense of continuing operation	651,948	376,502	300,268
Continue operations [member]
Income tax expense
Tax expense of continuing operation	446,796	221,262	262,940
Discontinued operations [member]
Income tax expense
Tax expense of discontinued operation	₩ 205,152	₩ 155,240	₩ 37,328

Income Tax Expense - Difference

Income Tax Expense - Difference Between Income Taxes Computed using the Statutory Corporate Income Tax Rates and the Recorded Income Taxes (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of average effective tax rate and applicable tax rate [abstract]
Income taxes at statutory income tax rate	₩ 834,146	₩ 505,824	₩ 308,913
Non-taxable income	(13,924)	(41,084)	(92,666)
Non-deductible expenses	15,329	31,882	14,630
Tax credit and tax reduction	(62,075)	(48,774)	(32,877)
Changes in unrecognized deferred taxes	(68,589)	(69,776)	83,940
Changes in tax rate	(36,193)	24,537	4,050
Income tax refund and others	(16,746)	(26,107)	14,278
Income tax expense	₩ 651,948	₩ 376,502	₩ 300,268

Income Tax Expense - Deferred T

Income Tax Expense - Deferred Taxes Directly Charged to (Credited from) Equity (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred taxes directly charged to (credited from) equity	₩ (191,043)	₩ (173,676)	₩ 11,912
Valuation gain (loss) on financial assets measured at fair value [member]
Deferred taxes directly charged to (credited from) equity	(208,490)	(166,612)	2,983
Share of other comprehensive income (loss) of associates and joint ventures [member]
Deferred taxes directly charged to (credited from) equity	(34)	(14)	2,279
Valuation loss on derivatives [member]
Deferred taxes directly charged to (credited from) equity	(5,709)	(6,886)	(16,083)
Remeasurement of defined benefit liabilities [member]
Deferred taxes directly charged to (credited from) equity	(3,780)	(164)	22,733
Gain on disposal of treasury shares and others [member]
Deferred taxes directly charged to (credited from) equity	₩ 26,970	₩ 0	₩ 0

Income Tax Expense - Details of

Income Tax Expense - Details of the Changes in Deferred Tax Assets (Liabilities) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	₩ (2,603,987)	₩ (2,354,804)
Deferred tax expense (income)	(331,704)	(75,249)
Directly charged to (credited from) equity	(191,043)	(173,676)	₩ 11,912
Business combinations	(1,158)	(258)
Spin-off	2,186,719
Ending	(941,173)	(2,603,987)	(2,354,804)
Loss allowance [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	91,285	88,913
Deferred tax expense (income)	(8,397)	1,326
Directly charged to (credited from) equity	0
Business combinations	0	1,046
Spin-off	(5,531)
Ending	77,357	91,285	88,913
Accrued interest income [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(1,631)	(2,039)
Deferred tax expense (income)	(2,022)	435
Directly charged to (credited from) equity	0
Business combinations	0	(27)
Spin-off	3,487
Ending	(166)	(1,631)	(2,039)
Financial assets measured at fair value [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(81,055)	98,101
Deferred tax expense (income)	(6,765)	(17,586)
Directly charged to (credited from) equity	(208,490)	(166,612)
Business combinations	0	5,042
Spin-off	138,482
Ending	(157,828)	(81,055)	98,101
Investments in subsidiaries, associates and joint ventures [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(1,673,906)	(1,613,048)
Deferred tax expense (income)	(281,035)	(60,844)
Directly charged to (credited from) equity	(34)	(14)
Business combinations	0
Spin-off	1,923,158
Ending	(31,817)	(1,673,906)	(1,613,048)
Property equipment and intangible assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(511,862)	(371,489)
Deferred tax expense (income)	(42,456)	(47,468)
Directly charged to (credited from) equity	0
Business combinations	(1,023)	(92,905)
Spin-off	249,374
Ending	(305,967)	(511,862)	(371,489)
Provisions [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	6,294	2,543
Deferred tax expense (income)	(1,436)	3,751
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	(660)
Ending	4,198	6,294	2,543
Retirement benefit obligation [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	102,285	100,194
Deferred tax expense (income)	(3,563)	1,873
Directly charged to (credited from) equity	(3,780)	(164)
Business combinations	0	382
Spin-off	(42,610)
Ending	52,332	102,285	100,194
Valuation gain (loss) on derivatives [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	14,767	17,507
Deferred tax expense (income)	210	4,146
Directly charged to (credited from) equity	(5,709)	(6,886)
Business combinations	0
Spin-off	(2,932)
Ending	6,336	14,767	17,507
Foreign currency translation differences for foreign operations [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	21,774	22,005
Deferred tax expense (income)	(396)	(231)
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	0
Ending	21,378	21,774	22,005
Incremental costs to acquire contract [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(807,831)	(829,055)
Deferred tax expense (income)	53,492	21,224
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	4,468
Ending	(749,871)	(807,831)	(829,055)
Contract assets and liabilities [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(2,606)	(28,030)
Deferred tax expense (income)	405	25,424
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	0
Ending	(2,201)	(2,606)	(28,030)
Right-of-use assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(372,297)	(390,936)
Deferred tax expense (income)	(35,851)	18,639
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	18,646
Ending	(389,502)	(372,297)	(390,936)
Lease liabilities [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	362,476	385,394
Deferred tax expense (income)	38,600	(22,918)
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	(19,539)
Ending	381,537	362,476	385,394
Others [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	120,514	64,620
Deferred tax expense (income)	(95,537)	(30,310)
Directly charged to (credited from) equity	26,970
Business combinations	(135)	86,204
Spin-off	16,669
Ending	68,481	120,514	64,620
Temporary differences [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(2,731,793)	(2,455,320)
Deferred tax expense (income)	(384,751)	(102,539)
Directly charged to (credited from) equity	(191,043)	(173,676)
Business combinations	(1,158)	(258)
Spin-off	2,283,012
Ending	(1,025,733)	(2,731,793)	(2,455,320)
Deferred tax assets related to unused tax loss carryforwards and tax credit carryforwards [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	127,806	100,516
Deferred tax expense (income)	53,047	27,290
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	(96,293)
Ending	84,560	127,806	100,516
Tax loss carryforwards [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	88,223	91,136
Deferred tax expense (income)	7,915	(2,913)
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	(96,138)
Ending	0	88,223	91,136
Unused tax credits [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	39,583	9,380
Deferred tax expense (income)	45,132	30,203
Directly charged to (credited from) equity	0
Business combinations	0
Spin-off	(155)
Ending	₩ 84,560	₩ 39,583	₩ 9,380

Income Tax Expense - Details _2

Income Tax Expense - Details of Temporary Differences, Unused Tax Loss Carryforwards and Unused Tax Credits Carryforwards Which are Not Recognized as Deferred Tax Assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Investments in subsidiaries, associates and joint ventures	₩ (176,520)	₩ 8,365
Unused tax loss carryforwards	347,889	1,042,063
Unused tax credit carryforwards	34	1,037
Loss allowance [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Temporary differences	85,998	102,085
Others [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Temporary differences	₩ 61,368	₩ 68,415

Income Tax Expense - Unused Tax

Income Tax Expense - Unused Tax Loss Carryforwards and Unused Tax Credit Carryforwards Which are Not Recognized as Deferred Tax Assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Unused tax loss carryforwards	₩ 347,889	₩ 1,042,063
Unused tax credit carryforwards	34	₩ 1,037
Less than 1 year [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Unused tax loss carryforwards	57,346
Unused tax credit carryforwards	0
1 ~ 2 years [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Unused tax loss carryforwards	39,974
Unused tax credit carryforwards	0
2 ~ 3 years [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Unused tax loss carryforwards	19,087
Unused tax credit carryforwards	0
More than 3 years [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Unused tax loss carryforwards	231,482
Unused tax credit carryforwards	₩ 34

Earnings per Share - Summary of

Earnings per Share - Summary of Basic Earnings Per Share (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic earnings per share attributable to owners of the Parent Company:
Profit from continuing operation attributable to owners of the Parent Company	₩ 2,407,523	₩ 1,504,352	₩ 888,698
Interest on hybrid bonds	(14,766)	(14,766)	(14,766)
Profit from continuing operation attributable to owners of the Parent Company on common shares	1,271,395	683,956	544,093
Profit from discontinued operation attributable to owners of the Parent Company on common shares	₩ 1,147,594	₩ 816,582	₩ 316,640
Continuing operation	₩ 3,614	₩ 1,741	₩ 1,469
Parent Company [Member]
Basic earnings per share attributable to owners of the Parent Company:
Profit from continuing operation attributable to owners of the Parent Company	₩ 1,217,520	₩ 648,579	₩ 544,099
Interest on hybrid bonds	(14,766)	(14,766)	(14,766)
Profit from continuing operation attributable to owners of the Parent Company on common shares	1,202,754	633,813	529,333
Profit from discontinued operation attributable to owners of the Parent Company on common shares	₩ 1,190,003	₩ 855,773	₩ 344,598
Weighted average number of common shares outstanding	332,761,592	363,977,155	360,320,795
Continuing operation	₩ 3,614	₩ 1,741	₩ 1,469
Discontinued operation	₩ 3,576	₩ 2,352	₩ 956

Earnings per Share - Weighted A

Earnings per Share - Weighted Average Number of Common Shares Outstanding (Detail) - shares	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Earnings per Share [Line Items]
Issued shares	218,833,144		80,745,711		80,745,711
Number of common shares outstanding	217,582,152	356,635,765	71,327,153	365,682,240
Parent Company [Member]
Earnings per Share [Line Items]
Issued shares	403,728,555		403,728,555		403,728,555
Treasury shares	(47,092,790)		(38,046,315)		(44,379,415)
Acquisition of treasury shares	(1,494,032)		(9,046,475)
Disposal of treasury shares	3,134,003				6,333,100
Spin-off	(140,693,584)
Number of common shares outstanding	217,582,152		356,635,765		365,682,240
Weighted average shares issued	403,728,555		403,728,555		403,728,555
Weighted average treasury shares	(47,092,790)		(38,046,315)		(44,379,415)
Acquisition of weighted average treasury shares	(1,383,241)		(1,705,085)
Disposal of weighted average treasury shares	1,022,242				971,655
Spin-off of weighted average treasury shares	(23,513,174)
Number of weighted average shares outstanding	332,761,592		363,977,155		360,320,795

Earnings per Share - Summary _2

Earnings per Share - Summary Of Detailed Information Of Diluted Earnings Per Share (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement [Line Items]
Profit from continuing operation attributable to owners of the Parent Company on common shares	₩ 1,271,395	₩ 683,956	₩ 544,093
Profit from discontinued operation attributable to owners of the Parent Company on common shares	₩ 1,147,594	₩ 816,582	₩ 316,640
Adjusted weighted average number of common shares outstanding	332,917,848	364,041,895
Continuing operation	₩ 3,613	₩ 1,741	₩ 1,469
Parent Company [Member]
Statement [Line Items]
Profit from continuing operation attributable to owners of the Parent Company on common shares	₩ 1,202,754	₩ 633,813	₩ 529,333
Profit from discontinued operation attributable to owners of the Parent Company on common shares	₩ 1,190,003	₩ 855,773	₩ 344,598
Adjusted weighted average number of common shares outstanding	332,917,848	364,041,895
Continuing operation	₩ 3,613	₩ 1,741
Discontinued operation	₩ 3,574	₩ 2,351

Earnings Per Share - Summary _3

Earnings Per Share - Summary Of Weighted Average Number Of Diluted Common Shares Outstanding (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2021	Jan. 01, 2020
Statement [Line Items]
Outstanding shares	217,582,152	71,327,153	356,635,765	365,682,240
Effect of treasury shares	(360,999)	(1,705,085)
Effect of Spin-off	(23,513,174)
Adjusted weighted average number of common shares outstanding	332,917,848	364,041,895
Share Option [member]
Statement [Line Items]
Adjusted weighted average number of common shares outstanding	156,256	64,740

Dividends - Details of Dividend

Dividends - Details of Dividend Declared (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2021	Jan. 01, 2020
Disclosure of dividends [Line Items]
Dividend type	Cash dividends	Cash dividends	Cash dividends
Number of shares outstanding	217,582,152	71,327,153		356,635,765	365,682,240
Face value (in won)	₩ 100	₩ 500
Dividends	₩ 716,990	₩ 715,080	₩ 730,098
Interim [Member]
Disclosure of dividends [Line Items]
Dividend type	Cash dividends (Interim)	Cash dividends (Interim)	Cash dividends (Interim)
Number of shares outstanding	217,616,645	73,136,448	71,869,828
Face value (in won)	₩ 100	₩ 500	₩ 500
Dividend ratio	1635.00%	200.00%	200.00%
Dividends	₩ 355,804	₩ 73,136	₩ 71,870
Year-end [Member]
Disclosure of dividends [Line Items]
Number of shares outstanding	217,582,152	71,327,153	73,136,448
Face value (in won)	₩ 100	₩ 500	₩ 500
Dividend ratio	1660.00%	1800.00%	1800.00%
Dividends	₩ 361,186	₩ 641,944	₩ 658,228

Dividends - Dividends Yield Rat

Dividends - Dividends Yield Ratios (Detail) - ₩ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Dividends [abstract]
Dividend type	Cash dividends	Cash dividends	Cash dividends
Dividend per share	₩ 3,295	₩ 10,000	₩ 10,000
Closing price at year-end	₩ 57,900	₩ 238,000	₩ 238,000
Dividend yield ratio	5.69%	4.20%	4.20%

Categories of Financial Instr_3

Categories of Financial Instruments - Financial Assets by Category (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of financial assets [line items]
Cash and cash equivalents	₩ 872,731	₩ 1,369,653	₩ 1,270,824	₩ 1,506,699
Financial instruments	509,052	1,427,845
Short-term investment securities	5,010	150,392
Long-term investment securities	1,715,078	1,648,837
Accounts receivable - trade	1,921,617	2,214,353
Loans and other receivables	1,195,917	1,738,003
Derivative financial assets	217,594	164,695
Assets	6,436,999	8,713,778
Financial assets at fair value through profit or loss [member]
Disclosure of financial assets [line items]
Cash and cash equivalents	505,578	539,372
Financial instruments	389,368	1,122,251
Short-term investment securities	5,010	150,392
Long-term investment securities	203,473	193,396
Loans and other receivables	459,959	517,175
Derivative financial assets	34,933	99,559
Assets	1,598,321	2,622,145
Derivatives hedging instrument [member]
Disclosure of financial assets [line items]
Derivative financial assets	182,661	65,136
Assets	182,661	65,136
Equity instruments at FVOCI [member]
Disclosure of financial assets [line items]
Long-term investment securities	1,510,428	1,454,361
Assets	1,510,428	1,454,361
Debt instruments at FVOCI [member]
Disclosure of financial assets [line items]
Long-term investment securities	1,177	1,080
Assets	1,177	1,080
Financial assets at amortised cost [member]
Disclosure of financial assets [line items]
Cash and cash equivalents	367,153	830,281
Financial instruments	119,684	305,594
Accounts receivable - trade	1,921,617	2,214,353
Loans and other receivables	735,958	1,220,828
Assets	₩ 3,144,412	₩ 4,571,056

Categories of Financial Instr_4

Categories of Financial Instruments - Financial Assets by Category (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Long-term investment securities	₩ 1,715,078	₩ 1,648,837
Equity instruments at FVOCI [member]
Disclosure of financial assets [line items]
Long-term investment securities	₩ 1,510,428	₩ 1,454,361

Categories of Financial Instr_5

Categories of Financial Instruments - Financial Liabilities by Category (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial liabilities [line items]
Accounts payable - trade	₩ 190,559	₩ 372,909
Derivative financial liabilities	321,136	375,160
Borrowings	407,185	2,138,922
Debentures	8,426,683	8,579,743
Lease liabilities	1,534,282	1,436,777
Accounts payable - other and others	5,524,692	6,051,550
Financial liabilities	16,404,537	18,955,061
Financial liabilities at fair value through profit or loss [member]
Disclosure of financial liabilities [line items]
Derivative financial liabilities	321,025	333,099
Financial liabilities	321,025	333,099
Financial liabilities measured at amortized cost [Member]
Disclosure of financial liabilities [line items]
Accounts payable - trade	190,559	372,909
Borrowings	407,185	2,138,922
Debentures	8,426,683	8,579,743
Lease liabilities	1,534,282	1,436,777
Accounts payable - other and others	5,524,692	6,051,550
Financial liabilities	16,083,401	18,579,901
Derivatives hedging instrument [member]
Disclosure of financial liabilities [line items]
Derivative financial liabilities	111	42,061
Financial liabilities	₩ 111	₩ 42,061

Financial Risk Management - Mon

Financial Risk Management - Monetary Assets and Liabilities Denominated in Foreign Currencies (Detail) € in Thousands, ¥ in Thousands, $ in Thousands, ₩ in Millions	Dec. 31, 2021KRW (₩)	Dec. 31, 2021USD ($)	Dec. 31, 2021EUR (€)	Dec. 31, 2021JPY (¥)	Dec. 31, 2020KRW (₩)
Disclosure of detailed information about financial instruments [Line items]
Monetary assets denominated in foreign currencies	₩ 6,436,999				₩ 8,713,778
Monetary liabilities denominated in foreign currencies	16,404,537				₩ 18,955,061
Currency risk [member]
Disclosure of detailed information about financial instruments [Line items]
Monetary assets denominated in foreign currencies	62,290	$ 52,331	€ 59	¥ 0
Monetary liabilities denominated in foreign currencies	1,811,509	$ 1,527,169	€ 0	¥ 87,837
Currency risk [member] | US Dollar [member]
Disclosure of detailed information about financial instruments [Line items]
Monetary assets denominated in foreign currencies	62,038
Monetary liabilities denominated in foreign currencies	1,810,459
Currency risk [member] | Euro [member]
Disclosure of detailed information about financial instruments [Line items]
Monetary assets denominated in foreign currencies	80
Monetary liabilities denominated in foreign currencies	0
Currency risk [member] | Yen [member]
Disclosure of detailed information about financial instruments [Line items]
Monetary assets denominated in foreign currencies	0
Monetary liabilities denominated in foreign currencies	905
Currency risk [member] | Other currencies [member]
Disclosure of detailed information about financial instruments [Line items]
Monetary assets denominated in foreign currencies	172
Monetary liabilities denominated in foreign currencies	₩ 145

Financial Risk Management - Imp

Financial Risk Management - Impact on Income Before Income Tax of a Hypothetical Change in Exchange Rates (Detail) - Currency risk [member] ₩ in Millions	Dec. 31, 2021KRW (₩)
If increased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	₩ 2,750
If decreased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	(2,750)
US Dollar [member] | If increased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	2,830
US Dollar [member] | If decreased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	(2,830)
Euro [member] | If increased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	8
Euro [member] | If decreased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	(8)
Yen [member] | If increased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	(90)
Yen [member] | If decreased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	90
Other currencies [member] | If increased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	2
Other currencies [member] | If decreased by 10% [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (reduce) the Group's income before income tax	₩ (2)

Financial Risk Management - Add

Financial Risk Management - Additional Information (Detail) - KRW (₩)	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [Line items]
Long-term borrowings	₩ 394,187,000,000	₩ 2,028,924,000,000
Bonds	8,426,683,000,000	8,579,743,000,000
Maximum credit exposure	4,837,085,000,000	7,066,754,000,000
Floating-rate [member]
Disclosure of detailed information about financial instruments [Line items]
Long-term borrowings	37,500,000,000
Bonds	355,650,000,000
Face value of floating rate long term payables others	2,090,715,000,000
Interest rate risk [member] | Long-term payables - other [member]
Disclosure of detailed information about financial instruments [Line items]
Hypothetical increase (decrease) in interest rate, effect on income before income taxes	₩ 20,907,000,000
Hypothetical increase (decrease) in interest rate	1.00%
Financial instruments [member]
Disclosure of detailed information about financial instruments [Line items]
Maximum credit exposure	₩ 509,052,000,000	1,427,845,000,000
Available- for-sale financial assets [Member]
Disclosure of detailed information about financial instruments [Line items]
Maximum credit exposure	2,077,000,000	4,154,000,000
Loans and receivables [member]
Disclosure of detailed information about financial instruments [Line items]
Maximum credit exposure	1,195,917,000,000	1,738,003,000,000
Cash and cash equivalents [Member]
Disclosure of detailed information about financial instruments [Line items]
Maximum credit exposure	₩ 872,550,000,000	₩ 1,369,423,000,000

Financial Risk Management - Max

Financial Risk Management - Maximum Credit Exposure (Detail) - KRW (₩)	Dec. 31, 2021	Dec. 31, 2020
Disclosure of credit risk exposure [line items]
Maximum credit exposure	₩ 4,837,085,000,000	₩ 7,066,754,000,000
Cash and cash equivalents [Member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	872,550,000,000	1,369,423,000,000
Financial instruments [member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	509,052,000,000	1,427,845,000,000
Available- for-sale financial assets [Member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	2,077,000,000	4,154,000,000
Accounts receivable - trade [member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	1,921,617,000,000	2,214,353,000,000
Contract assets [member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	118,278,000,000	148,281,000,000
Loans and receivables [member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	1,195,917,000,000	1,738,003,000,000
Derivatives hedging instrument [member]
Disclosure of credit risk exposure [line items]
Maximum credit exposure	₩ 217,594,000,000	₩ 164,695,000,000

Financial Risk Management - Sum

Financial Risk Management - Summary of Gross Carrying Amounts of Each Financial Asset Except for Accounts Receivable Trade and Derivative Financial Asset (Detail) ₩ in Millions	Dec. 31, 2021KRW (₩)
Financial assets at fair value through profit or loss [member]
Disclosure of credit risk exposure [line items]
Gross amount	₩ 850,227
Carrying amount	850,227
Financial assets at FVOCI [member]
Disclosure of credit risk exposure [line items]
Gross amount	1,177
Carrying amount	1,177
Financial assets at amortised cost [member] | 12-month expected credit losses [member]
Disclosure of credit risk exposure [line items]
Gross amount	754,918
Loss allowance	(2,787)
Carrying amount	752,131
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]
Disclosure of credit risk exposure [line items]
Gross amount	43,643
Loss allowance	(6,190)
Carrying amount	37,453
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of credit risk exposure [line items]
Gross amount	149,091
Loss allowance	(83,033)
Carrying amount	₩ 66,058

Financial Risk Management - S_2

Financial Risk Management - Summary of Changes in Loss Allowance for Debt Investments (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Beginning balance	₩ 8,713,778
Ending balance	6,436,999
Debt Investments [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Beginning balance	100,565
Remeasurement of loss allowance, net	6,001
Transfer to lifetime ECL - not credit impaired	0
Transfer to lifetime ECL - credit impaired	0
Amounts written off	(16,429)
Recovery of amounts written off	10,501
Business combinations	358
Spin-off	(8,986)
Ending balance	92,010
Debt Investments [member] | 12-month expected credit losses [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Beginning balance	3,751
Remeasurement of loss allowance, net	316
Transfer to lifetime ECL - not credit impaired	(306)
Transfer to lifetime ECL - credit impaired	(980)
Amounts written off	0
Recovery of amounts written off	6
Business combinations	0
Spin-off	0
Ending balance	2,787
Debt Investments [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Beginning balance	7,995
Remeasurement of loss allowance, net	2,885
Transfer to lifetime ECL - not credit impaired	306
Transfer to lifetime ECL - credit impaired	(2,555)
Amounts written off	0
Recovery of amounts written off	0
Business combinations	0
Spin-off	(2,441)
Ending balance	6,190
Debt Investments [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Beginning balance	88,819
Remeasurement of loss allowance, net	2,800
Transfer to lifetime ECL - not credit impaired	0
Transfer to lifetime ECL - credit impaired	3,535
Amounts written off	(16,429)
Recovery of amounts written off	10,495
Business combinations	358
Spin-off	(6,545)
Ending balance	₩ 83,033

Financial Risk Management - Con

Financial Risk Management - Contractual Maturities of Financial Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Accounts payable – trade, carrying amount	₩ 190,559	₩ 372,909
Borrowings, carrying amount	407,185	2,138,922
Debentures, carrying amount	8,426,683	8,579,743
Accounts payable – other and others, carrying amount	5,524,692	6,051,550
Non-derivative financial liabilities, carrying amount	16,083,401
Accounts payable – trade, carrying amount	190,559
Borrowings, contractual cash flows	420,503
Debentures, contractual cash flows	9,479,976
Lease liabilities-Carrying amount	1,534,282	₩ 1,436,777
Lease liabilities-Contractual cash flows	1,653,416
Accounts payable – other and others, contractual cash flows	5,636,104
Non-derivative financial liabilities, contractual cash flows	17,380,558
Less than 1 year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Accounts payable – trade, carrying amount	190,559
Borrowings, contractual cash flows	59,864
Debentures, contractual cash flows	1,603,760
Lease liabilities-Contractual cash flows	359,356
Accounts payable – other and others, contractual cash flows	3,917,356
Non-derivative financial liabilities, contractual cash flows	6,130,895
1-5 years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Borrowings, contractual cash flows	360,639
Debentures, contractual cash flows	4,987,959
Lease liabilities-Contractual cash flows	989,603
Accounts payable – other and others, contractual cash flows	1,534,636
Non-derivative financial liabilities, contractual cash flows	7,872,837
More than 5 years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Debentures, contractual cash flows	2,888,257
Lease liabilities-Contractual cash flows	304,457
Accounts payable – other and others, contractual cash flows	184,112
Non-derivative financial liabilities, contractual cash flows	₩ 3,376,826

Financial Risk Management - Per

Financial Risk Management - Periods in Which Cash Flows from Cash Flow Hedge Derivatives are Expected to Occur (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of maturity analysis for derivative financial liabilities [line items]
Assets, carrying amount	₩ 217,594	₩ 164,695
Liabilities, carrying amount	(321,136)	(375,160)
Derivatives hedging instrument [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Assets, carrying amount	182,661	₩ 65,136
Liabilities, carrying amount	(111)
Net assets, carrying amount	182,550
Assets, contractual cash flows	188,759
Liabilities, contractual cash flows	(111)
Net assets, contractual cash flows	188,648
Less than 1 year [member] | Derivatives hedging instrument [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Assets, contractual cash flows	27,248
Liabilities, contractual cash flows	(52)
Net assets, contractual cash flows	27,196
1-5 years [member] | Derivatives hedging instrument [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Assets, contractual cash flows	135,409
Liabilities, contractual cash flows	(59)
Net assets, contractual cash flows	135,350
More than 5 years [member] | Derivatives hedging instrument [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Assets, contractual cash flows	26,102
Liabilities, contractual cash flows	0
Net assets, contractual cash flows	₩ 26,102

Financial Risk Management - Deb

Financial Risk Management - Debt-equity Ratio (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [abstract]
Total Liabilities	₩ 18,576,139	₩ 23,510,714
Total equity	₩ 12,335,138	₩ 24,396,243	₩ 22,816,934	₩ 22,349,250
Debt-equity ratios	150.60%	96.37%

Financial Risk Management - Fai

Financial Risk Management - Fair Value and Carrying Amount of Financial Assets and Liabilities Including Fair Value Hierarchy (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [Line items]
Borrowings	₩ 407,185	₩ 2,138,922
Debentures	8,426,683	8,579,743
Assets	6,436,999	8,713,778
Derivative financial liabilities	321,136	375,160
Financial liabilities	16,404,537	18,955,061
Measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
FVTPL	1,598,321	2,622,145
Derivative hedging instruments	182,661	65,136
FVOCI	1,511,605	1,455,441
Assets	3,292,587	4,142,722
FVTPL	321,025	333,099
Derivative financial liabilities	111	42,061
Financial liabilities	321,136	375,160
Not measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
Borrowings	392,237	2,282,316
Debentures	8,679,472	9,085,324
Long-term payables - other	2,010,852	1,582,805
Financial liabilities	11,082,561	12,950,445
Carrying amount [member] | Measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
FVTPL	1,598,321	2,622,145
Derivative hedging instruments	182,661	65,136
FVOCI	1,511,605	1,455,441
Assets	3,292,587	4,142,722
FVTPL	321,025	333,099
Derivative financial liabilities	111	42,061
Financial liabilities	321,136	375,160
Carrying amount [member] | Not measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
Borrowings	407,185	2,138,923
Debentures	8,426,683	8,579,743
Long-term payables - other	2,009,833	1,566,954
Financial liabilities	10,843,701	12,285,620
Level 1 [member] | Measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
FVTPL	55,455	60,473
FVOCI	1,344,434	885,452
Assets	1,399,889	945,925
Level 2 [member] | Measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
FVTPL	1,359,915	2,291,355
Derivative hedging instruments	182,661	65,136
Assets	1,542,576	2,356,491
Derivative financial liabilities	111	42,061
Financial liabilities	111	42,061
Level 2 [member] | Not measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
Borrowings	392,237	2,282,316
Debentures	8,679,472	9,085,324
Long-term payables - other	2,010,852	1,582,805
Financial liabilities	11,082,561	12,950,445
Level 3 [member] | Measured at fair value [member]
Disclosure of detailed information about financial instruments [Line items]
FVTPL	182,951	270,317
FVOCI	167,171	569,989
Assets	350,122	840,306
FVTPL	321,025	333,099
Financial liabilities	₩ 321,025	₩ 333,099

Financial Risk Management - Int

Financial Risk Management - Interest Rates Used by the Group for the Fair Value Measurement (Detail)	12 Months Ended
	Dec. 31, 2021
Derivatives instrument [member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [Line items]
Interest rate	0.32%
Derivatives instrument [member] | Top of range [member]
Disclosure of detailed information about financial instruments [Line items]
Interest rate	3.90%
Borrowings and debentures [member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [Line items]
Interest rate	1.64%
Borrowings and debentures [member] | Top of range [member]
Disclosure of detailed information about financial instruments [Line items]
Interest rate	2.33%
Long-term payables - other [member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [Line items]
Interest rate	1.62%
Long-term payables - other [member] | Top of range [member]
Disclosure of detailed information about financial instruments [Line items]
Interest rate	2.39%

Financial Risk Management - Cha

Financial Risk Management - Changes of Financial Assets Classified as Level 3 (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)
Disclosure of fair value measurement of assets [line items]
Balance at beginning	₩ 47,906,957
Balance at ending	30,911,277
Balance at beginning	(23,510,714)
Balance at ending	(18,576,139)
Level 3 [member]
Disclosure of fair value measurement of assets [line items]
Balance at beginning	840,306
Gain for the period	21,973
OCI	45,838
Acquisition	139,536
Disposal	(100,159)
Transfer	(406,749)
Balance at ending	350,122
Spin-off	(190,623)
Business combinations	237,846
FVTPL [member]
Disclosure of fair value measurement of assets [line items]
Acquisition	(217,736)
FVTPL [member] | Level 3 [member]
Disclosure of fair value measurement of assets [line items]
Balance at beginning	270,317
Gain for the period	21,973
OCI	7,318
Acquisition	128,517
Disposal	(75,238)
Transfer	(37,564)
Balance at ending	182,951
Balance at beginning	(333,099)
Gain for the period	(8,036)
Spin-off	(132,372)
Balance at ending	(321,025)
Financial assets at FVOCI [member] | Level 3 [member]
Disclosure of fair value measurement of assets [line items]
Balance at beginning	569,989
Gain for the period	0
OCI	38,520
Acquisition	11,019
Disposal	(24,921)
Transfer	(369,185)
Balance at ending	167,171
Spin-off	₩ (58,251)

Financial Risk Management - C_2

Financial Risk Management - Changes of Financial Assets Classified as Level 3 (Parenthetical) (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2021KRW (₩)
Level 1 [member]
Disclosure of fair value measurement of assets [line items]
Transfers Out of Level 1 Of Fair Value Hierarchy, Assets	₩ 368,000

Financial Risk Management - Car

Financial Risk Management - Carrying Amount of Financial Instruments Recognized of Which Offset Agreements are Applicable (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [Line items]
Financial assets, Gross financial instruments recognized		₩ 325,347
Financial assets, Amount offset		(203,403)
Financial assets, Net financial instruments presented on the statements of financial position		121,944
Financial assets, Relevant financial instruments not offset		(453)
Financial assets, Net amount		121,491
Financial liabilities, Gross financial instruments recognized		302,449
Financial liabilities, Amount offset		(203,403)
Financial liabilities, Net financial instruments presented on the statements of financial position		99,046
Financial liabilities, Relevant financial instruments not offset		(453)
Financial liabilities, Net amount		98,593
Derivatives hedging instrument [member]
Disclosure of detailed information about financial instruments [Line items]
Financial assets, Gross financial instruments recognized		8,015
Financial assets, Net financial instruments presented on the statements of financial position		8,015
Financial assets, Relevant financial instruments not offset		(453)
Financial assets, Net amount		7,562
Financial liabilities, Gross financial instruments recognized		453
Financial liabilities, Net financial instruments presented on the statements of financial position		453
Financial liabilities, Relevant financial instruments not offset		(453)
Accounts payable - other and others [member]
Disclosure of detailed information about financial instruments [Line items]
Financial liabilities, Gross financial instruments recognized	₩ 200,849	301,996
Financial liabilities, Amount offset	(189,424)	(203,403)
Financial liabilities, Net financial instruments presented on the statements of financial position	11,425	98,593
Financial liabilities, Net amount		98,593
Accounts receivable - trade and others [member]
Disclosure of detailed information about financial instruments [Line items]
Financial assets, Gross financial instruments recognized	197,828	317,332
Financial assets, Amount offset	(189,424)	(203,403)
Financial assets, Net financial instruments presented on the statements of financial position	₩ 8,404	113,929
Financial assets, Net amount		₩ 113,929

Transactions with Related Par_3

Transactions with Related Parties - Compensation for the Key Management (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [abstract]
Salaries	₩ 5,956	₩ 10,029	₩ 5,969
Defined benefits plan expenses	2,845	3,459	1,237
Share option	146	158	325
Compensation for the key management	₩ 8,947	₩ 13,646	₩ 7,531

Transactions with Related Par_4

Transactions with Related Parties - Transactions with Related Parties (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	₩ 911,230	₩ 759,387	₩ 621,112
Operating expense and others	2,148,060	2,058,356	2,044,540
Acquisition of property and equipment	387,313	818,894	1,053,124
SK hynix Inc. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	285,104	316,001	273,047
Operating expense and others	199	267	481
SK Holdings Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	33,253	40,717	53,507
Operating expense and others	633,868	596,509	612,248
Acquisition of property and equipment	82,191	76,534	95,426
F&U Credit information Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	3,828	3,484	2,293
Operating expense and others	50,029	51,228	55,179
HappyNarae Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	6,899	9,871	6,943
Operating expense and others	20,229	17,361	18,121
Acquisition of property and equipment	133,625	129,621	168,286
KEB HanaCard Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	17,962	683	832
Operating expense and others	4,374	3,065	1,901
SK Wyverns Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	202	1,279	1,399
Operating expense and others	8,203	19,354	21,528
Daehan Kanggun BcN Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	10,943
SK China Company Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	131,141
Other associates [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	11,778	65,431	17,286
Operating expense and others	8,356	12,511	13,864
Acquisition of property and equipment		78	457
Content Wavve Co., Ltd.
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	174	446
Operating expense and others	78,964	56,631
Associates [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	175,854	387,324	294,857
Operating expense and others	70,962	143,056	92,953
Acquisition of property and equipment		78	457
SK Engineering & Construction Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others		12,349	13,339
Operating expense and others		238	1,601
Acquisition of property and equipment			7,400
SK Innovation Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	53,445	38,999	26,697
Operating expense and others	19,093	18,464	2,777
SK Energy Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	18,970	16,009	16,294
Operating expense and others	1,250	296	516
SK Geo Centric Co., Ltd. (Formerly, SK Global Chemical Co., Ltd.) [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	33,435
Operating expense and others	9
SK TNS Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	75	1,118	240
Operating expense and others	6,868	43,767	35,824
Acquisition of property and equipment	57,903	496,460	607,546
SKC INFRA SERVICE Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	26
Operating expense and others	30,798
Acquisition of property and equipment	8,028
SK Networks Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	14,439	13,893	29,321
Operating expense and others	1,055,512	1,022,976	1,088,443
Acquisition of property and equipment	24	32	449
SK Networks Services Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	7,292	6,936	1,056
Operating expense and others	73,596	76,653	76,671
Acquisition of property and equipment	3,520	2,023	4,979
SK Telesys Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others		388	474
Operating expense and others		10,751	9,686
Acquisition of property and equipment		30,453	59,392
SK hynix Semiconductor (China) Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	48,546	73,683	73,542
SK Global Chemical Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others		20,667
Operating expense and others		9
SK Global Chemical International Trading (Shanghai) Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others		15,898	14,535
Operating expense and others		8	131
Miscellaneous other related parties [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	156,055	102,141	90,307
Operating expense and others	30,762	128,268	105,569
Acquisition of property and equipment	23,428	83,693	109,189
Others [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	702,123	331,346	272,748
Operating expense and others	1,443,230	1,318,791	1,339,339
Acquisition of property and equipment	305,122	742,282	₩ 957,241
UbiNS Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	415
Operating expense and others	42,335
Acquisition of property and equipment	50,847
SK m&service Co., Ltd [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	764
Operating expense and others	3,670
Acquisition of property and equipment	888
D R E A M U S C O M P A N Y [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	795
Operating expense and others	20,074
Acquisition of property and equipment	396
SK RENT A C A R Co., Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	5,843
Operating expense and others	18,564
SK hynix system ic (Wuxi) Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	20,807
SK Planet Co Ltd [member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	2,048
Operating expense and others	16,747
Acquisition of property and equipment	6,081
Eleven Street Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	2,785
Operating expense and others	5,699
SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	5,793
Operating expense and others	18,861
Acquisition of property and equipment	20,382
Sk Battery Hungary Kft [Member]
Disclosure of transactions between related parties [Line Items]
Operating revenue and others	₩ 38,413	₩ 19,394

Transactions with Related Par_5

Transactions with Related Parties - Transactions with Related Parties (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [Line Items]
Dividends paid	₩ 248,677	₩ 216,241	₩ 216,241
Dividends received	14,132	1,170	10,011
Handset purchanse amounting	2,148,060	2,058,356	2,044,540
SK hynix Inc. [member]
Disclosure of transactions between related parties [Line Items]
Dividends received	170,937	146,100	219,150
Handset purchanse amounting	199	267	481
Other associates [Member]
Disclosure of transactions between related parties [Line Items]
Dividend declared	10,716	18,749	11,955
Handset purchanse amounting	8,356	12,511	13,864
Handset purchases [member]
Disclosure of transactions between related parties [Line Items]
Handset purchanse amounting	996,910	961,167	₩ 1,043,902
Yongin SK Academy [Member]
Disclosure of transactions between related parties [Line Items]
Dividends received		₩ 70,495
SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) [Member]
Disclosure of transactions between related parties [Line Items]
Dividends received	9,637
Handset purchanse amounting	18,861
SK China Company Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Dividends received	₩ 131,141

Transactions with Related Par_6

Transactions with Related Parties - Account Balances with Related Parties (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Loans [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	₩ 22,147	₩ 22,147
Loans [member] | Daehan Kanggun BcN Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	22,147	22,147
Loans [member] | Associates [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	22,147	22,147
Accounts receivable - trade and others [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	61,774	125,096
Accounts receivable - trade and others [member] | SK Holdings Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	2,092	6,449
Accounts receivable - trade and others [member] | F&U Credit information Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	4	10
Accounts receivable - trade and others [member] | SK hynix Inc. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	11,526	33,773
Accounts receivable - trade and others [member] | Wave City Development Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	2,623	25,782
Accounts receivable - trade and others [member] | Daehan Kanggun BcN Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	3,857	2,779
Accounts receivable - trade and others [member] | KEB HanaCard Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	529	352
Accounts receivable - trade and others [member] | Content Warve Company Limited [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		283
Accounts receivable - trade and others [member] | Other associates [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	84	9,098
Accounts receivable - trade and others [member] | Associates [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	7,097	72,077
Accounts receivable - trade and others [member] | SK Engineering & Construction Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		1,521
Accounts receivable - trade and others [member] | SK Networks Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	241	2,245
Accounts receivable - trade and others [member] | SK Networks Services Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		579
Accounts receivable - trade and others [member] | SK Telesys Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		37
Accounts receivable - trade and others [member] | SK TNS Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		263
Accounts receivable - trade and others [member] | SK Innovation Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	3,022	11,737
Accounts receivable - trade and others [member] | SK Energy Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		3,502
Accounts receivable - trade and others [member] | SK Hystec Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		494
Accounts receivable - trade and others [member] | SK hynix Semiconductor (China) Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		5,896
Accounts receivable - trade and others [member] | SK ON Hungary Kft. (Formerly, SK Battery Hungary Kft.)
Disclosure of transactions between related parties [Line Items]
Accounts receivable	2,075
Accounts receivable - trade and others [member] | SK Global Chemical Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		1,142
Accounts receivable - trade and others [member] | SK Global Chemical International Trading (Shanghai) Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		795
Accounts receivable - trade and others [member] | Miscellaneous other related parties [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	8,307	15,564
Accounts receivable - trade and others [member] | Others [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	52,585	46,570
Accounts receivable - trade and others [member] | HappyNarae Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable		720
Accounts receivable - trade and others [member] | Mintit Co., Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	17,929
Accounts receivable - trade and others [member] | Happy Narae Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	6
Accounts receivable - trade and others [member] | SK m&service Co., Ltd [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	1,453
Accounts receivable - trade and others [member] | SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	2,649
Accounts receivable - trade and others [member] | Contents Wavve Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	183
Accounts receivable - trade and others [member] | Incross Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	3,610
Accounts receivable - trade and others [member] | Eleven Street Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	2,851
Accounts receivable - trade and others [member] | SK Planet Co Ltd [member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	668
Accounts receivable - trade and others [member] | S K RENT A C A R Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	116
Accounts receivable - trade and others [member] | UbiNS Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts receivable	24
Accounts payable - other and others [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	575,836	622,523
Accounts payable - other and others [member] | SK Holdings Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	69,652	64,373
Accounts payable - other and others [member] | F&U Credit information Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	5,265	4,699
Accounts payable - other and others [member] | SK hynix Inc. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	166	128
Accounts payable - other and others [member] | KEB HanaCard Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	48,020	145,328
Accounts payable - other and others [member] | Content Warve Company Limited [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		2,491
Accounts payable - other and others [member] | Other associates [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	1,197	1,686
Accounts payable - other and others [member] | Associates [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	54,482	154,332
Accounts payable - other and others [member] | SK Engineering & Construction Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		152
Accounts payable - other and others [member] | SK Networks Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	198,631	108,233
Accounts payable - other and others [member] | SK Networks Services Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		7,103
Accounts payable - other and others [member] | SK Telesys Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		9,253
Accounts payable - other and others [member] | SK TNS Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		89,915
Accounts payable - other and others [member] | SK Innovation Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	38,022	44,105
Accounts payable - other and others [member] | SK Energy Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		1,837
Accounts payable - other and others [member] | SK Hystec Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		6,085
Accounts payable - other and others [member] | SK Global Chemical Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		5
Accounts payable - other and others [member] | SK Global Chemical International Trading (Shanghai) Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		21
Accounts payable - other and others [member] | Miscellaneous other related parties [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	29,106	120,575
Accounts payable - other and others [member] | Others [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	451,702	403,818
Accounts payable - other and others [member] | HappyNarae Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable		₩ 16,534
Accounts payable - other and others [member] | Mintit Co., Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	131
Accounts payable - other and others [member] | Happy Narae Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	49,349
Accounts payable - other and others [member] | SK m&service Co., Ltd [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	18,921
Accounts payable - other and others [member] | SK Shieldus Co., Ltd. (Formerly, ADT CAPS Co., Ltd.) [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	24,593
Accounts payable - other and others [member] | Contents Wavve Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	9,873
Accounts payable - other and others [member] | Incross Co Ltd [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	11,829
Accounts payable - other and others [member] | Eleven Street Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	7,782
Accounts payable - other and others [member] | SK Planet Co Ltd [member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	31,652
Accounts payable - other and others [member] | S K RENT A C A R Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	16,715
Accounts payable - other and others [member] | UbiNS Co., Ltd. [Member]
Disclosure of transactions between related parties [Line Items]
Accounts payable	₩ 14,932

Transactions with Related Par_7

Transactions with Related Parties - Account Balances with Related Parties (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Wave City Development Co., Ltd. [member] | Accounts Receivable Trade And Others [member]
Disclosure of transactions between related parties [line items]
Allowances for losses on accounts receivable from related party	₩ 1,102	₩ 10,880

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) ₩ in Millions	Dec. 31, 2021KRW (₩)Number	Dec. 31, 2020KRW (₩)
Commitments and contingencies [Line Items]
Properties pledged as collateral for leases on buildings	₩ 1,513
Number of legal provisions | Number	0
Sales of Handsets [member]
Commitments and contingencies [Line Items]
Accounts receivable - other	₩ 493,277	₩ 571,004

Statements of Cash Flows - Adju

Statements of Cash Flows - Adjustments for Income and Expenses from Operating Activities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Adjustments to reconcile profit (loss) [abstract]
Interest income	₩ (43,850)	₩ (50,357)	₩ (63,579)
Dividends	(14,132)	(1,170)	(10,011)
Gain on foreign currency translations	(10,753)	(8,928)	(4,576)
Gain on sale of accounts receivable — other	(27,725)	(22,605)	(15,855)
Gain relating to investments in associates and joint ventures, net	(1,948,447)	(1,028,403)	(449,543)
Gain on disposal of property and equipment and intangible assets	(40,109)	(35,644)	(8,533)
Gain on business transfer	(82,248)	(12,455)	(69,522)
Gain relating to financial instruments at FVTPL	(91,244)	(145,016)	(36,336)
Other income	(10,369)	(4,220)	(1,875)
Interest expense	342,342	399,176	406,087
Loss on foreign currency translations	8,005	12,730	4,948
Loss on disposal of long-term investment securities	0	98	0
Loss on sale of accounts receivable — other			5,823
Income tax expense	651,948	376,502	300,268
Expense related to defined benefit plan	190,462	198,794	175,165
Share option	91,646	4,313	2,073
Bonus paid by treasury shares	29,643
Depreciation and amortization	4,114,394	4,169,996	4,021,016
Bad debt for accounts receivables — trade	31,546	48,625	28,841
Loss on disposal of property and equipment and intangible assets	47,369	41,598	47,760
Impairment loss on property and equipment and intangible assets	3,135	208,833	65,935
Bad debt for accounts receivable — other	6,001	10,559	5,802
Loss on impairment of investment assets			1,670
Loss relating to financial instruments at FVTPL	76,142	27,082	8,437
Other financial fees	142,015	44,734
Other expenses	8,008	22,412	21,044
Adjustments for income and expenses from operating activities	₩ 3,473,779	₩ 4,256,654	₩ 4,435,039

Statements of Cash Flows - Chan

Statements of Cash Flows - Changes in Assets and Liabilities from Operating Activities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Adjustments to reconcile profit (loss) [abstract]
Accounts receivable — trade	₩ (95,374)	₩ (33,410)	₩ (211,712)
Accounts receivable — other	(152,038)	(50,003)	48,399
Accrued income			151
Advanced payments	(43,212)	(945)	(12,204)
Prepaid expenses	77,404	112,270	(680,925)
Inventories	(70,601)	(7,219)	115,893
Long-term accounts receivable — other	83,658	26,027	(56,216)
Contract assets	(11,582)	1,528	(68,805)
Guarantee deposits	8,125	26,122	6,392
Accounts payable — trade	12,312	3,023	(23,607)
Accounts payable — other	(109,476)	311,737	167,595
Withholdings	(55,925)	33,348	(31,545)
Contract liabilities	(2,158)	35,426	33,574
Deposits received	(3,737)	(1,028)	(3,112)
Accrued expenses	7,505	61,848	116,949
Provisions	(19,324)	(30,773)	(36,478)
Long-term provisions	(260)	(548)	(1,699)
Plan assets	(51,697)	(145,214)	(130,790)
Retirement benefit payment	(114,897)	(76,987)	(84,098)
Others	(27,418)	37,256	(3,892)
Changes in assets and liabilities from operating activities	₩ (568,695)	₩ 302,458	₩ (856,130)

Statements of Cash Flows - Sign

Statements of Cash Flows - Significant Non-cash Transactions (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Non-cash Investing and Financing Transactions [abstract]
Increase (decrease) in accounts payable — other relating to the acquisition of property and equipment and intangible assets	₩ 1,063,800	₩ (426,723)	₩ 438,622
Increase of right-of-use assets	672,723	736,157	₩ 1,141,349
Merger of Tbroad Co., Ltd. and two other companies by SK Broadband Co., Ltd.		₩ 1,072,487
Change in assets and liabilities by spin-off	14,379,397
Retirement of treasury shares	1,965,952
Disposal of treasury shares (Congratulatory bonus for spin-off)	₩ 114,373

Statements of Cash Flows - Reco

Statements of Cash Flows - Reconciliation of Liabilities Arising from Financing Activities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	₩ 13,711,436	₩ 13,382,746
Cash flows	(732,932)	(285,264)
Exchange rate changes	146,184	(95,579)
Fair value changes	(151,811)	96,192
Business Combinations	2,984	7,696
Spin-off	(2,281,910)
Other changes	1,501,481	605,645
Ending balance	12,195,432	13,711,436
Short-term borrowings [Member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	109,998	20,603
Cash flows	(50,823)	76,375
Exchange rate changes		13,020
Business Combinations	1,825
Spin-off	(48,510)
Other changes	508
Ending balance	12,998	109,998
Long-term borrowings [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	2,028,924	2,022,537
Cash flows	63,132	(3,026)
Exchange rate changes	600	(14,208)
Business Combinations	662
Spin-off	(1,703,300)
Other changes	4,169	23,621
Ending balance	394,187	2,028,924
Debentures [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	8,579,743	8,220,833
Cash flows	(16,755)	445,462
Exchange rate changes	145,584	(94,391)
Spin-off	(295,544)
Other changes	13,655	7,839
Ending balance	8,426,683	8,579,743
Lease liabilities [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	1,436,777	1,291,007
Cash flows	(431,674)	(412,666)
Business Combinations	497	7,696
Spin-off	(85,322)
Other changes	614,003	550,740
Ending balance	1,534,281	1,436,777
Long-term payables - other [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	1,566,954	1,971,609
Cash flows	(426,267)	(428,100)
Other changes	869,146	23,445
Ending balance	2,009,833	1,566,954
Derivative financial liabilities [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	54,176	1,043
Cash flows	332	8,191
Fair value changes	(42,282)	44,942
Spin-off	(12,115)
Ending balance	111	54,176
Derivative financial assets [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	(65,136)	(144,886)
Cash flows		28,500
Fair value changes	(117,525)	51,250
Ending balance	(182,661)	₩ (65,136)
Financial liabilities at FVTPL
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Cash flows	129,123
Fair value changes	7,996
Spin-off	₩ (137,119)

Reconciliation of Liabilities A

Reconciliation of Liabilities Arising from Financing Activities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of cash flows [abstract]
Payments of cash dividends	₩ (1,028,520)	₩ (742,136)	₩ (718,698)
Payments of interest on hybrid bonds	(14,766)	(14,766)	(14,766)
Acquisition of treasury shares	(76,111)	(426,664)
Cash inflow from transactions with the non-controlling shareholders	444,124	17,766
Cash outflow from transactions with the non-controlling shareholders	(19,406)	(6,515)
Cash outflow from spinoff	(626,000)
Cash flow from other financing activities	(1,320,679)	(1,172,315)
Cash flows from financing activities	₩ (2,053,611)	₩ (1,457,579)	₩ (686,674)

Emissions Liabilities - Disclos

Emissions Liabilities - Disclosure of Quantity of Emissions Rights Allocated Free of Charge (Detail)	Dec. 31, 2021CO2
Disclosure of quantity of emissions rights allocated free of charge [Line Items]
Emissions rights allocated free of charge	2,664,533
Quantities allocated in 2019 [member]
Disclosure of quantity of emissions rights allocated free of charge [Line Items]
Emissions rights allocated free of charge	815,927
Quantities allocated in 2020 [member]
Disclosure of quantity of emissions rights allocated free of charge [Line Items]
Emissions rights allocated free of charge	814,842
Quantities allocated in 2021 [member]
Disclosure of quantity of emissions rights allocated free of charge [Line Items]
Emissions rights allocated free of charge	1,033,764

Emissions Liabilities - Summary

Emissions Liabilities - Summary of Changes in Emissions Rights Quantities (Detail)	12 Months Ended
	Dec. 31, 2021CO2
Disclosure of Changes in emissions rights quantities [Line Items]
Beginning balance	(63,320)
Allocation at no cost	2,664,533
Additional allocation	348,658
Purchase	68,471
Surrender or shall be surrendered	(3,133,010)
Borrowing	60,977
Ending balance	(53,691)
Quantities allocated in 2019 [member]
Disclosure of Changes in emissions rights quantities [Line Items]
Beginning balance	(2,343)
Allocation at no cost	815,927
Additional allocation	131,015
Surrender or shall be surrendered	(1,005,576)
Borrowing	60,977
Quantities allocated in 2020 [member]
Disclosure of Changes in emissions rights quantities [Line Items]
Beginning balance	(60,977)
Allocation at no cost	814,842
Additional allocation	217,643
Purchase	68,471
Surrender or shall be surrendered	(1,039,979)
Quantities allocated in 2021 [member]
Disclosure of Changes in emissions rights quantities [Line Items]
Allocation at no cost	1,033,764
Surrender or shall be surrendered	(1,087,455)
Ending balance	(53,691)

Emissions Liabilities - Additio

Emissions Liabilities - Additional Information (Detail)	Dec. 31, 2021CO2
Disclosure Of Emissions Liabilities [Abstract]
Estimated annual greenhouse gas emissions quantities	1,087,455

Non-current Assets Held for S_3

Non-current Assets Held for Sale - Summary of Non-current Assets Held for Sale (Detail) ₩ in Millions, د.ك in Millions	Dec. 31, 2021KRW (₩)	Dec. 31, 2021KWD (د.ك)	Dec. 31, 2020KRW (₩)
Disclosure of Noncurrent Assets Held for Sale [Line Items]
Investments in associates | ₩	₩ 2,197,351		₩ 14,354,113
Carrot General Insurance Co Ltd
Disclosure of Noncurrent Assets Held for Sale [Line Items]
Investments in associates | د.ك		د.ك 8,734

Spin-Off - Summary of Profit or

Spin-Off - Summary of Profit or Loss from Discontinued Operations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of analysis of single amount of discontinued operations [line items]
Operating revenue and other operating income	₩ 16,864,348	₩ 16,183,498	₩ 15,512,014
Revenue	16,748,585	16,087,747	15,416,431
Other income	115,763	95,751	95,583
Operating expense	15,431,986	15,148,478	14,524,960
Labor	2,300,754	2,108,496	1,981,864
Commission	5,426,114	5,103,012	4,766,682
Depreciation and amortization	3,672,555	3,664,665	3,540,984
Network interconnection	749,599	770,712	752,334
Advertising	233,401	272,091	279,846
Rent	140,418	171,179	152,589
Cost of goods sold	1,167,417	1,106,001	1,378,105
Others	1,431,587	1,658,362	1,410,288
Operating profit	1,432,362	1,035,020	987,054
Finance income	155,133	140,685	121,692
Finance costs	315,604	322,943	334,912
Gain relating to investments in subsidiaries, associates and joint ventures,	446,300	52,456	33,199
Profit before income tax	1,718,191	905,218	807,033
Income tax expense	651,948	376,502	300,268
Profit for the year	2,418,989	1,500,538	860,733
Discontinued operations [member]
Disclosure of analysis of single amount of discontinued operations [line items]
Operating revenue and other operating income	2,469,329	2,541,133	2,331,433
Revenue	2,383,083	2,536,904	2,324,285
Other income	86,246	4,229	7,148
Operating expense	2,396,324	2,471,519	2,311,229
Labor	824,505	897,676	840,809
Commission	349,344	244,074	235,384
Depreciation and amortization	287,412	326,417	315,678
Network interconnection	863	762	1,099
Advertising	158,512	159,589	154,715
Rent	2,754	2,115	2,254
Cost of goods sold	426,161	502,469	455,257
Others	346,773	338,417	306,033
Operating profit	73,005	69,614	20,204
Finance income	47,417	100,511	20,464
Finance costs	269,823	174,250	103,044
Gain relating to investments in subsidiaries, associates and joint ventures,	1,502,147	975,947	416,344
Profit before income tax	1,352,746	971,822	353,968
Income tax expense	205,152	155,240	37,328
Profit for the year	₩ 1,147,594	₩ 816,582	₩ 316,640

Spin-Off - Summary of Cash Flow

Spin-Off - Summary of Cash Flow and Financial Statement from Discontinued Operations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of analysis of single amount of discontinued operations [line items]
Cash flows from operating activities	₩ 5,031,279	₩ 5,821,876	₩ 4,034,984
Cash flows from investing activities	(3,486,189)	(4,250,402)	(3,581,584)
Cash flows from financing activities	(2,053,611)	(1,457,579)	(686,674)
Current assets	6,352,665	8,775,086
Non-current assets	24,558,612	39,131,871
Total Assets	30,911,277	47,906,957
Current liabilities	6,960,435	8,177,967
Non-current liabilities	11,615,704	15,332,747
Total Liabilities	18,576,139	23,510,714
Discontinued operations [member]
Disclosure of analysis of single amount of discontinued operations [line items]
Cash flows from operating activities	59,255	495,696	196,518
Cash flows from investing activities	(967,053)	(483,599)	(189,064)
Cash flows from financing activities	(88,872)	₩ (22,902)	₩ (35,395)
Current assets	2,608,601
Non-current assets	19,269,615
Total Assets	21,878,216
Current liabilities	2,161,458
Non-current liabilities	4,676,324
Total Liabilities	6,837,782
Net assets	₩ 15,040,434

Cash Dividends paid to the Pa_3

Cash Dividends paid to the Parent Company - Summary of Cash Dividends Received from Consolidated Subsidiaries and Associates (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of dividends [Line Items]
Cash dividends received	₩ 14,132	₩ 1,170	₩ 10,011
Subsidiaries [member]
Disclosure of dividends [Line Items]
Cash dividends received	12,646	119,036	287,549
Associates [member]
Disclosure of dividends [Line Items]
Cash dividends received	312,793	164,850	227,500
Parent [member]
Disclosure of dividends [Line Items]
Cash dividends received	₩ 325,439	₩ 283,886	₩ 515,049

Subsequent Events - Summary of

Subsequent Events - Summary of Disposal of Treasury Shares (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	Jan. 20, 2022	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2020
Disclosure of Disposal of Treasury Shares [Line Items]
Number of treasury shares to be disposed		218,833,144	80,745,711	80,745,711
Price of the treasury shares to be disposed per share (in won)		₩ 100		₩ 500
Aggregate disposal value		₩ 57,017	₩ 300,000
Classification of assets as held for sale [member]
Disclosure of Disposal of Treasury Shares [Line Items]
Number of treasury shares to be disposed	413,080
Price of the treasury shares to be disposed per share (in won)	₩ 56,300
Aggregate disposal value	₩ 23,256
Disposal date	Jan. 24, 2022
Purpose of disposal	Allotment of shares as bonus payment
Method of disposal	Over-the-counter