Progress Energy (PREX) 10-K 27 Feb 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2022	Jan. 31, 2023	Jun. 30, 2022
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-32853
Entity Registrant Name	DUKE ENERGY CORPORATION
Entity Tax Identification Number	20-2777218
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	526 South Church Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202-1803
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 82,471,565
Entity Common Stock, Shares Outstanding		770,080,285
Documents Incorporated by Reference	Portions of the Duke Energy definitive proxy statement for the 2023 Annual Meeting of the Shareholders or an amendment to this Annual Report are incorporated by reference into PART III, Items 10, 11 and 13 hereof. This combined Form 10-K is filed separately by eight registrants: Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont (collectively the Duke Energy Registrants). Information contained herein relating to any individual registrant is filed by such registrant solely on its own behalf. Each registrant makes no representation as to information relating exclusively to the other registrants.
Entity Central Index Key	0001326160
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	DUK
Security Exchange Name	NYSE
Junior Subordinated Debentures 5.625% Coupon Due September 2078
Document Information [Line Items]
Title of 12(b) Security	5.625% Junior Subordinated Debentures
Trading Symbol	DUKB
Security Exchange Name	NYSE
Depositary Share
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares
Trading Symbol	DUK PR A
Security Exchange Name	NYSE
3.10% Senior Notes due 2028
Document Information [Line Items]
Title of 12(b) Security	3.10% Senior Notes due 2028
Trading Symbol	DUK 28A
Security Exchange Name	NYSE
3.85% Senior Notes due 2034
Document Information [Line Items]
Title of 12(b) Security	3.85% Senior Notes due 2034
Trading Symbol	DUK 34
Security Exchange Name	NYSE
Duke Energy Carolinas
Document Information [Line Items]
Entity File Number	1-4928
Entity Registrant Name	DUKE ENERGY CAROLINAS, LLC
Entity Tax Identification Number	56-0205520
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	526 South Church Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202-1803
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000030371
Progress Energy
Document Information [Line Items]
Entity File Number	1-15929
Entity Registrant Name	PROGRESS ENERGY, INC.
Entity Tax Identification Number	56-2155481
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	410 South Wilmington Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601-1748
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0001094093
Duke Energy Progress
Document Information [Line Items]
Entity File Number	1-3382
Entity Registrant Name	DUKE ENERGY PROGRESS, LLC
Entity Tax Identification Number	56-0165465
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	410 South Wilmington Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601-1748
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000017797
Duke Energy Florida
Document Information [Line Items]
Entity File Number	1-3274
Entity Registrant Name	DUKE ENERGY FLORIDA, LLC
Entity Tax Identification Number	59-0247770
Entity Incorporation, State or Country Code	FL
Entity Address, Address Line One	299 First Avenue North
Entity Address, City or Town	St. Petersburg
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33701
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000037637
Duke Energy Ohio
Document Information [Line Items]
Entity File Number	1-1232
Entity Registrant Name	DUKE ENERGY OHIO, INC.
Entity Tax Identification Number	31-0240030
Entity Incorporation, State or Country Code	OH
Entity Address, Address Line One	139 East Fourth Street
Entity Address, City or Town	Cincinnati
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45202
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000020290
Duke Energy Indiana
Document Information [Line Items]
Entity File Number	1-3543
Entity Registrant Name	DUKE ENERGY INDIANA, LLC
Entity Tax Identification Number	35-0594457
Entity Incorporation, State or Country Code	IN
Entity Address, Address Line One	1000 East Main Street
Entity Address, City or Town	Plainfield
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46168
City Area Code	704
Local Phone Number	382-3853
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000081020
Piedmont
Document Information [Line Items]
Entity File Number	1-6196
Entity Registrant Name	PIEDMONT NATURAL GAS COMPANY, INC.
Entity Tax Identification Number	56-0556998
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	4720 Piedmont Row Drive
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28210
City Area Code	704
Local Phone Number	364-3120
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000078460

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Duke Energy Carolinas
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Progress Energy
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Duke Energy Progress
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Duke Energy Florida
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Duke Energy Ohio
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Duke Energy Indiana
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Piedmont
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues
Regulated electric		$ 25,759	$ 22,319	$ 21,461
Regulated natural gas		2,724	2,008	1,642
Nonregulated electric and other		285	294	263
Total operating revenues		28,768	24,621	23,366
Operating Expenses
Operation, maintenance and other		5,734	5,703	5,502
Depreciation and amortization		5,086	4,762	4,504
Property and other taxes		1,466	1,355	1,311
Impairment of assets and other charges		434	353	978
Total operating expenses		22,778	19,133	18,806
Gains on Sales of Other Assets and Other, net		22	12	11
Operating Income		6,012	5,500	4,571
Other Income and Expenses
Equity in earnings (losses) of unconsolidated affiliates		113	62	(2,005)
Other income and expenses, net		392	636	451
Total other income and expenses		505	698	(1,554)
Interest Expense		2,439	2,207	2,097
Income From Continuing Operations Before Income Taxes		4,078	3,991	920
Income Tax Expense (Benefit) From Continuing Operations		300	268	(169)
Income From Continuing Operations		3,778	3,723	1,089
Loss From Discontinued Operations, net of tax		(1,323)	(144)	(7)
Net Income		2,455	3,579	1,082
Add: Net Loss Attributable to Noncontrolling Interests		95	329	295
Net Income Attributable to Parent		2,550	3,908	1,377
Less: Preferred Dividends		106	106	107
Net Income Available to Common Stockholders		2,444	3,802	1,270
Other Comprehensive Income, net of tax
Pension and OPEB adjustments	[1]	(19)	7	6
Net unrealized gain on cash flow hedges	[1]	285	(68)	(138)
Unrealized (losses) gains on available-for-sale securities	[1]	(21)	(8)	3
Other Comprehensive Income (Loss), net of tax	[1]	174	(56)	(118)
Comprehensive Income		2,629	3,523	964
Add: Comprehensive Loss Attributable to Noncontrolling Interests		(84)	(319)	(306)
Comprehensive Income Attributable to Duke Energy Corporation		$ 2,713	$ 3,842	$ 1,270
Income from continuing operations available to Duke Energy Corporation common stockholders
Basic (usd per share)		$ 4.74	$ 4.68	$ 1.33
Diluted (usd per share)		4.74	4.68	1.33
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders
Basic (usd per share)		(1.57)	0.26	0.39
Diluted (usd per share)		(1.57)	0.26	0.39
Net income available to Duke Energy Corporation common stockholders
Basic (usd per share)		3.17	4.94	1.72
Diluted (usd per share)		$ 3.17	$ 4.94	$ 1.72
Weighted average shares outstanding
Basic (in shares)		770	769	737
Diluted (in shares)		770	769	738
Fuel used in electric generation and purchased power
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		$ 8,782	$ 6,255	$ 6,051
Cost of natural gas
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		1,276	705	460
Duke Energy Carolinas
Operating Revenues
Total operating revenues		7,857	7,102	7,015
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		2,015	1,601	1,682
Operation, maintenance and other		1,892	1,833	1,743
Depreciation and amortization		1,526	1,468	1,462
Property and other taxes		340	320	299
Impairment of assets and other charges		26	227	476
Total operating expenses		5,799	5,449	5,662
Gains on Sales of Other Assets and Other, net		4	2	1
Operating Income		2,062	1,655	1,354
Other Income and Expenses
Other income and expenses, net		221	270	177
Total other income and expenses		221	270	177
Interest Expense		557	538	487
Income From Continuing Operations Before Income Taxes		1,726	1,387	1,044
Income Tax Expense (Benefit) From Continuing Operations		126	51	88
Net Income Attributable to Parent		1,600	1,336	956
Other Comprehensive Income, net of tax
Net unrealized gain on cash flow hedges			1
Other Comprehensive Income (Loss), net of tax			1
Comprehensive Income Attributable to Duke Energy Corporation		1,600	1,337	956
Progress Energy
Operating Revenues
Total operating revenues		13,125	11,057	10,627
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		5,078	3,584	3,479
Operation, maintenance and other		2,458	2,529	2,479
Depreciation and amortization		2,142	1,929	1,818
Property and other taxes		607	542	545
Impairment of assets and other charges		12	82	495
Total operating expenses		10,297	8,666	8,816
Gains on Sales of Other Assets and Other, net		11	14	9
Operating Income		2,839	2,405	1,820
Other Income and Expenses
Other income and expenses, net		181	215	129
Total other income and expenses		181	215	129
Interest Expense		844	794	790
Income Before Income Taxes		2,176	1,826	1,159
Income Tax Expense (Benefit) From Continuing Operations		348	227	113
Net Income		1,828	1,599	1,046
Add: Net Loss Attributable to Noncontrolling Interests			(1)	(1)
Net Income Attributable to Parent		1,828	1,598	1,045
Other Comprehensive Income, net of tax
Pension and OPEB adjustments		5	1	(1)
Net unrealized gain on cash flow hedges		1	3	5
Unrealized (losses) gains on available-for-sale securities		(6)		(1)
Other Comprehensive Income (Loss), net of tax		0	4	3
Comprehensive Income		1,828	1,603	1,049
Add: Comprehensive Loss Attributable to Noncontrolling Interests			1	1
Comprehensive Income Attributable to Duke Energy Corporation		1,828	1,602	1,048
Duke Energy Progress
Operating Revenues
Total operating revenues		6,753	5,780	5,422
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		2,492	1,778	1,743
Operation, maintenance and other		1,475	1,467	1,332
Depreciation and amortization		1,187	1,097	1,116
Property and other taxes		190	159	167
Impairment of assets and other charges		7	63	499
Total operating expenses		5,351	4,564	4,857
Gains on Sales of Other Assets and Other, net		4	13	8
Operating Income		1,406	1,229	573
Other Income and Expenses
Other income and expenses, net		114	143	75
Total other income and expenses		114	143	75
Interest Expense		354	306	269
Income From Continuing Operations Before Income Taxes		1,166	1,066	379
Income Tax Expense (Benefit) From Continuing Operations		158	75	(36)
Net Income Attributable to Parent		1,008	991	415
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		1,008	991	415
Duke Energy Florida
Operating Revenues
Total operating revenues		6,353	5,259	5,188
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		2,586	1,806	1,737
Operation, maintenance and other		967	1,048	1,131
Depreciation and amortization		955	831	702
Property and other taxes		421	383	381
Impairment of assets and other charges		4	19	(4)
Total operating expenses		4,933	4,087	3,947
Gains on Sales of Other Assets and Other, net		2	1	1
Operating Income		1,422	1,173	1,242
Other Income and Expenses
Other income and expenses, net		74	71	53
Total other income and expenses		74	71	53
Interest Expense		362	319	326
Income From Continuing Operations Before Income Taxes		1,134	925	969
Income Tax Expense (Benefit) From Continuing Operations		225	187	198
Net Income Attributable to Parent		909	738	771
Other Comprehensive Income, net of tax
Unrealized (losses) gains on available-for-sale securities		(5)	(1)	(1)
Other Comprehensive Income (Loss), net of tax		(5)	(1)	(1)
Comprehensive Income Attributable to Duke Energy Corporation		904	737	770
Duke Energy Ohio
Operating Revenues
Regulated electric		1,798	1,493	1,405
Regulated natural gas		716	544	453
Total operating revenues		2,514	2,037	1,858
Operating Expenses
Operation, maintenance and other		523	479	463
Depreciation and amortization		324	307	278
Property and other taxes		369	355	324
Impairment of assets and other charges		(10)	25
Total operating expenses		2,124	1,711	1,477
Gains on Sales of Other Assets and Other, net		1	1
Operating Income		391	327	381
Other Income and Expenses
Other income and expenses, net		19	18	16
Total other income and expenses		19	18	16
Interest Expense		129	111	102
Income From Continuing Operations Before Income Taxes		281	234	295
Income Tax Expense (Benefit) From Continuing Operations		(21)	30	43
Net Income Attributable to Parent		302	204	252
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		302	204	252
Duke Energy Ohio | Fuel used in electric generation and purchased power
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		657	409	339
Duke Energy Ohio | Cost of natural gas
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		261	136	73
Duke Energy Indiana
Operating Revenues
Total operating revenues		3,922	3,174	2,795
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		1,819	985	767
Operation, maintenance and other		729	750	762
Depreciation and amortization		645	615	569
Property and other taxes		75	73	81
Impairment of assets and other charges		388	9
Total operating expenses		3,656	2,432	2,179
Operating Income		266	742	616
Other Income and Expenses
Other income and expenses, net		36	42	37
Total other income and expenses		36	42	37
Interest Expense		189	196	161
Income From Continuing Operations Before Income Taxes		113	588	492
Income Tax Expense (Benefit) From Continuing Operations		(24)	107	84
Net Income Attributable to Parent		137	481	408
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		137	481	408
Piedmont
Operating Revenues
Regulated natural gas		2,100	1,555	1,286
Nonregulated electric and other		24	14	11
Total operating revenues		2,124	1,569	1,297
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		1,015	569	386
Operation, maintenance and other		368	327	322
Depreciation and amortization		222	213	180
Property and other taxes		57	55	53
Impairment of assets and other charges		18	10	7
Total operating expenses		1,680	1,174	948
Gains on Sales of Other Assets and Other, net		4	0	0
Operating Income		448	395	349
Other Income and Expenses
Equity in earnings (losses) of unconsolidated affiliates		8	9	9
Other income and expenses, net		46	55	51
Total other income and expenses		54	64	60
Interest Expense		140	119	118
Income From Continuing Operations Before Income Taxes		362	340	291
Income Tax Expense (Benefit) From Continuing Operations		39	30	18
Net Income		323	310	273
Net Income Attributable to Parent		323	310	273
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		$ 323	$ 310	$ 273
[1]Net of income tax expense of approximately $52 million for the year ended December 31, 2022, and income tax benefit of approximately $17 million and $35 million for the years ended December 31, 2021, and 2020, respectively.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income		$ 2,455	$ 3,579	$ 1,082
Other Comprehensive Income, net of tax
Pension and OPEB adjustments	[1]	(19)	7	6
Net unrealized gains (losses) on cash flow hedges	[1]	285	(68)	(138)
Reclassification into earnings from cash flow hedges	[1]	(38)	13	11
Net unrealized losses on fair value hedges	[1]	(33)
Unrealized (losses) gains on available-for-sale securities	[1]	(21)	(8)	3
Other Comprehensive Income (Loss), net of tax	[1]	174	(56)	(118)
Comprehensive Income		2,629	3,523	964
Add: Comprehensive Loss Attributable to Noncontrolling Interests		84	319	306
Comprehensive Income Attributable to Duke Energy Corporation		2,713	3,842	1,270
Less: Preferred Dividends		106	106	107
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 2,607	$ 3,736	$ 1,163
[1]Net of income tax expense of approximately $52 million for the year ended December 31, 2022, and income tax benefit of approximately $17 million and $35 million for the years ended December 31, 2021, and 2020, respectively.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), tax expense (benefit)	$ 52	$ (17)	$ (35)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 409	$ 341
Receivables (net of allowance for doubtful accounts)	1,309	1,085
Receivables of VIEs (net of allowance for doubtful accounts)	3,106	2,437
Inventory	3,584	3,111
Current assets held for sale	262	232
Regulatory assets (includes amounts related to VIEs)	3,485	2,150
Other (including amounts related to VIEs)	1,067	584
Total current assets	13,222	9,940
Property, Plant and Equipment
Cost	163,839	154,496
Accumulated depreciation and amortization	(52,100)	(49,104)
Facilities to be retired, net	9	144
Net property, plant and equipment	111,748	105,536
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	14,645	12,487
Nuclear decommissioning trust funds	8,637	10,401
Operating lease right-of-use assets, net	1,042	1,136
Investments in equity method unconsolidated affiliates	455	457
Noncurrent assets held for sale	5,634	6,695
Other (including amounts related to VIEs)	3,400	3,632
Total other noncurrent assets	53,116	54,111
Total Assets	178,086	169,587
Current Liabilities
Accounts payable	4,754	3,531
Notes payable and commercial paper	3,952	3,304
Taxes accrued	722	731
Interest accrued	626	530
Current maturities of long-term debt (includes amounts related to VIEs)	4,154	3,387
Asset retirement obligations	773	647
Regulatory liabilities	1,466	1,211
Liabilities associated with assets held for sale	259	167
Other	2,167	2,423
Total current liabilities	18,873	15,931
Long-Term Debt (includes amounts related to VIEs)	67,061	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,964	9,379
Asset retirement obligations	11,955	11,953
Regulatory liabilities	13,582	16,152
Operating lease liabilities	876	940
Accrued pension and other post-retirement benefit costs	832	855
Investment tax credits	849	833
Noncurrent liabilities associated with assets held for sale	739	612
Other (includes amounts related to VIEs)	1,502	1,348
Total other noncurrent liabilities	40,299	42,072
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,862	44,371
Retained earnings	2,637	3,265
Accumulated other comprehensive (loss) income	(140)	(303)
Total Parent stockholders' equity	49,322	49,296
Noncontrolling interests	2,531	1,840
Total equity	51,853	51,136
Total Liabilities and Equity	$ 178,086	$ 169,587
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	$ 106	$ 105
Other (including amounts related to VIEs)	116	41
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,715	1,824
Other (including amounts related to VIEs)	52	30
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	350	76
Long-Term Debt (includes amounts related to VIEs)	3,108	3,379
Series A Preferred Stock
Equity
Preferred stock	973	973
Series B Preferred Stock
Equity
Preferred stock	989	989
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	44	7
Receivables (net of allowance for doubtful accounts)	338	300
Receivables of VIEs (net of allowance for doubtful accounts)	928	844
Receivables from affiliated companies	390	190
Inventory	1,164	1,026
Regulatory assets (includes amounts related to VIEs)	1,095	544
Other (including amounts related to VIEs)	216	95
Total current assets	4,175	3,006
Property, Plant and Equipment
Cost	54,650	51,874
Accumulated depreciation and amortization	(18,669)	(17,854)
Facilities to be retired, net	0	102
Net property, plant and equipment	35,981	34,122
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	4,293	2,935
Nuclear decommissioning trust funds	4,783	5,759
Operating lease right-of-use assets, net	78	92
Other (including amounts related to VIEs)	1,036	1,248
Total other noncurrent assets	10,190	10,034
Total Assets	50,346	47,162
Current Liabilities
Accounts payable	1,472	988
Accounts payable to affiliated companies	209	266
Notes payable to affiliated companies	1,233	226
Taxes accrued	228	274
Interest accrued	120	125
Current maturities of long-term debt (includes amounts related to VIEs)	1,018	362
Asset retirement obligations	261	249
Regulatory liabilities	530	487
Other	580	546
Total current liabilities	5,651	3,523
Long-Term Debt (includes amounts related to VIEs)	12,948	12,595
Long-Term Debt Payable to Affiliated Companies	300	318
Other Noncurrent Liabilities
Deferred income taxes	4,153	3,634
Asset retirement obligations	5,121	5,052
Regulatory liabilities	5,783	7,198
Operating lease liabilities	83	78
Accrued pension and other post-retirement benefit costs	38	50
Investment tax credits	300	287
Other (includes amounts related to VIEs)	527	536
Total other noncurrent liabilities	16,005	16,835
Commitments and Contingencies
Equity
Member's equity	15,448	13,897
Accumulated other comprehensive (loss) income	(6)	(6)
Total member's equity	15,442	13,891
Total Liabilities and Equity	50,346	47,162
Duke Energy Carolinas | VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	12	12
Other (including amounts related to VIEs)	8
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	208	220
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	10	5
Long-Term Debt (includes amounts related to VIEs)	689	703
Progress Energy
Current Assets
Cash and cash equivalents	108	70
Receivables (net of allowance for doubtful accounts)	318	247
Receivables of VIEs (net of allowance for doubtful accounts)	1,289	1,006
Receivables from affiliated companies	22	121
Inventory	1,579	1,398
Regulatory assets (includes amounts related to VIEs)	1,833	1,030
Other (including amounts related to VIEs)	342	125
Total current assets	5,491	3,997
Property, Plant and Equipment
Cost	64,822	60,894
Accumulated depreciation and amortization	(20,584)	(19,214)
Facilities to be retired, net		26
Net property, plant and equipment	44,238	41,706
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets (includes amounts related to VIEs)	7,146	5,909
Nuclear decommissioning trust funds	3,855	4,642
Operating lease right-of-use assets, net	628	691
Other (including amounts related to VIEs)	1,066	1,242
Total other noncurrent assets	16,350	16,139
Total Assets	66,079	61,842
Current Liabilities
Accounts payable	1,481	1,099
Accounts payable to affiliated companies	712	506
Notes payable to affiliated companies	843	2,809
Taxes accrued	135	128
Interest accrued	206	192
Current maturities of long-term debt (includes amounts related to VIEs)	697	1,082
Asset retirement obligations	289	275
Regulatory liabilities	576	478
Other	782	868
Total current liabilities	5,721	7,437
Long-Term Debt (includes amounts related to VIEs)	21,592	19,591
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	5,147	4,564
Asset retirement obligations	5,892	5,837
Regulatory liabilities	4,753	5,566
Operating lease liabilities	546	606
Accrued pension and other post-retirement benefit costs	292	417
Investment tax credits	358	364
Other (includes amounts related to VIEs)	222	162
Total other noncurrent liabilities	17,210	17,516
Commitments and Contingencies
Equity
Additional paid-in capital	11,832	9,149
Retained earnings	9,585	8,007
Accumulated other comprehensive (loss) income	(11)	(11)
Total Parent stockholders' equity	21,406	17,145
Noncontrolling interests		3
Total equity	21,406	17,148
Total Liabilities and Equity	$ 66,079	$ 61,842
Common stock, shares authorized (in shares)	100	100
Progress Energy | VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	$ 94	$ 93
Other (including amounts related to VIEs)	88	39
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,507	1,603
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	340	71
Long-Term Debt (includes amounts related to VIEs)	2,003	2,293
Duke Energy Progress
Current Assets
Cash and cash equivalents	49	35
Receivables (net of allowance for doubtful accounts)	167	127
Receivables of VIEs (net of allowance for doubtful accounts)	793	574
Receivables from affiliated companies	25	65
Inventory	1,006	921
Regulatory assets (includes amounts related to VIEs)	690	533
Other (including amounts related to VIEs)	174	83
Total current assets	2,904	2,338
Property, Plant and Equipment
Cost	38,875	37,018
Accumulated depreciation and amortization	(14,201)	(13,387)
Facilities to be retired, net		26
Net property, plant and equipment	24,674	23,657
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	4,724	4,118
Nuclear decommissioning trust funds	3,430	4,089
Operating lease right-of-use assets, net	370	389
Other (including amounts related to VIEs)	650	792
Total other noncurrent assets	9,174	9,388
Total Assets	36,752	35,383
Current Liabilities
Accounts payable	601	476
Accounts payable to affiliated companies	508	310
Notes payable to affiliated companies	238	172
Taxes accrued	77	163
Interest accrued	101	96
Current maturities of long-term debt (includes amounts related to VIEs)	369	556
Asset retirement obligations	288	274
Regulatory liabilities	332	381
Other	384	448
Total current liabilities	2,898	2,876
Long-Term Debt (includes amounts related to VIEs)	10,568	9,543
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	2,477	2,208
Asset retirement obligations	5,535	5,401
Regulatory liabilities	4,120	4,868
Operating lease liabilities	335	350
Accrued pension and other post-retirement benefit costs	160	221
Investment tax credits	124	128
Other (includes amounts related to VIEs)	76	87
Total other noncurrent liabilities	12,827	13,263
Commitments and Contingencies
Equity
Total member's equity	10,309	9,551
Total Liabilities and Equity	36,752	35,383
Duke Energy Progress | VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	39	39
Other (including amounts related to VIEs)	42
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	681	720
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	34	15
Long-Term Debt (includes amounts related to VIEs)	1,114	1,097
Duke Energy Florida
Current Assets
Cash and cash equivalents	45	23
Receivables (net of allowance for doubtful accounts)	148	117
Receivables of VIEs (net of allowance for doubtful accounts)	496	432
Receivables from affiliated companies	2	16
Inventory	573	477
Regulatory assets (includes amounts related to VIEs)	1,143	497
Other (including amounts related to VIEs)	108	80
Total current assets	2,515	1,642
Property, Plant and Equipment
Cost	25,940	23,865
Accumulated depreciation and amortization	(6,377)	(5,819)
Net property, plant and equipment	19,563	18,046
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	2,422	1,791
Nuclear decommissioning trust funds	424	553
Operating lease right-of-use assets, net	258	302
Other (including amounts related to VIEs)	372	399
Total other noncurrent assets	3,476	3,045
Total Assets	25,554	22,733
Current Liabilities
Accounts payable	880	623
Accounts payable to affiliated companies	177	209
Notes payable to affiliated companies	605	199
Taxes accrued	53	51
Interest accrued	80	68
Current maturities of long-term debt (includes amounts related to VIEs)	328	76
Asset retirement obligations	1	1
Regulatory liabilities	244	98
Other	363	408
Total current liabilities	2,731	1,733
Long-Term Debt (includes amounts related to VIEs)	9,381	8,406
Other Noncurrent Liabilities
Deferred income taxes	2,789	2,434
Asset retirement obligations	357	436
Regulatory liabilities	633	698
Operating lease liabilities	211	256
Accrued pension and other post-retirement benefit costs	111	166
Investment tax credits	234	236
Other (includes amounts related to VIEs)	84	73
Total other noncurrent liabilities	4,419	4,299
Commitments and Contingencies
Equity
Member's equity	9,031	8,298
Accumulated other comprehensive (loss) income	(8)	(3)
Total member's equity	9,023	8,295
Total Liabilities and Equity	25,554	22,733
Duke Energy Florida | VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	55	54
Other (including amounts related to VIEs)	46	39
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	826	883
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	306	56
Long-Term Debt (includes amounts related to VIEs)	890	1,196
Duke Energy Ohio
Current Assets
Cash and cash equivalents	16	13
Receivables (net of allowance for doubtful accounts)	73	96
Receivables from affiliated companies	247	122
Notes receivable from affiliated companies		15
Inventory	144	116
Regulatory assets (includes amounts related to VIEs)	103	72
Other (including amounts related to VIEs)	86	57
Total current assets	669	491
Property, Plant and Equipment
Cost	12,497	11,725
Accumulated depreciation and amortization	(3,250)	(3,106)
Facilities to be retired, net		6
Net property, plant and equipment	9,247	8,625
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets (includes amounts related to VIEs)	581	635
Operating lease right-of-use assets, net	18	19
Other (including amounts related to VIEs)	71	84
Total other noncurrent assets	1,590	1,658
Total Assets	11,506	10,774
Current Liabilities
Accounts payable	380	348
Accounts payable to affiliated companies	72	64
Notes payable to affiliated companies	497	103
Taxes accrued	317	275
Interest accrued	29	30
Current maturities of long-term debt (includes amounts related to VIEs)	475
Asset retirement obligations	17	13
Regulatory liabilities	99	62
Other	74	82
Total current liabilities	1,960	977
Long-Term Debt (includes amounts related to VIEs)	2,745	3,168
Long-Term Debt Payable to Affiliated Companies	25	25
Other Noncurrent Liabilities
Deferred income taxes	1,136	1,050
Asset retirement obligations	137	123
Regulatory liabilities	534	739
Operating lease liabilities	17	18
Accrued pension and other post-retirement benefit costs	90	109
Other (includes amounts related to VIEs)	96	101
Total other noncurrent liabilities	2,010	2,140
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	3,100	3,100
Retained earnings	904	602
Total Parent stockholders' equity	4,766	4,464
Total Liabilities and Equity	$ 11,506	$ 10,774
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Duke Energy Indiana
Current Assets
Cash and cash equivalents	$ 31	$ 6
Receivables (net of allowance for doubtful accounts)	112	100
Receivables from affiliated companies	298	98
Notes receivable from affiliated companies		134
Inventory	489	418
Regulatory assets (includes amounts related to VIEs)	249	277
Other (including amounts related to VIEs)	197	68
Total current assets	1,376	1,101
Property, Plant and Equipment
Cost	18,121	17,343
Accumulated depreciation and amortization	(6,021)	(5,583)
Net property, plant and equipment	12,100	11,760
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	875	1,278
Operating lease right-of-use assets, net	49	53
Other (including amounts related to VIEs)	254	296
Total other noncurrent assets	1,178	1,627
Total Assets	14,654	14,488
Current Liabilities
Accounts payable	391	282
Accounts payable to affiliated companies	206	221
Notes payable to affiliated companies	435
Taxes accrued	92	73
Interest accrued	48	49
Current maturities of long-term debt (includes amounts related to VIEs)	303	84
Asset retirement obligations	207	110
Regulatory liabilities	187	127
Other	161	105
Total current liabilities	2,030	1,051
Long-Term Debt (includes amounts related to VIEs)	3,854	4,089
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	1,299	1,303
Asset retirement obligations	744	877
Regulatory liabilities	1,454	1,565
Operating lease liabilities	47	50
Accrued pension and other post-retirement benefit costs	122	167
Investment tax credits	186	177
Other (includes amounts related to VIEs)	65	44
Total other noncurrent liabilities	3,917	4,183
Commitments and Contingencies
Equity
Member's equity	4,702	5,015
Accumulated other comprehensive (loss) income	1
Total member's equity	4,703	5,015
Total Liabilities and Equity	14,654	14,488
Piedmont
Current Assets
Receivables (net of allowance for doubtful accounts)	436	318
Receivables from affiliated companies	11	11
Inventory	172	109
Regulatory assets (includes amounts related to VIEs)	119	141
Other (including amounts related to VIEs)	4	9
Total current assets	742	588
Property, Plant and Equipment
Cost	10,869	9,918
Accumulated depreciation and amortization	(2,081)	(1,899)
Facilities to be retired, net	9	11
Net property, plant and equipment	8,797	8,030
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets (includes amounts related to VIEs)	392	316
Operating lease right-of-use assets, net	4	16
Investments in equity method unconsolidated affiliates	79	95
Other (including amounts related to VIEs)	272	288
Total other noncurrent assets	796	764
Total Assets	10,335	9,382
Current Liabilities
Accounts payable	345	196
Accounts payable to affiliated companies	51	40
Notes payable to affiliated companies	514	518
Taxes accrued	74	63
Interest accrued	40	37
Current maturities of long-term debt (includes amounts related to VIEs)	45	0
Regulatory liabilities	74	56
Other	81	81
Total current liabilities	1,224	991
Long-Term Debt (includes amounts related to VIEs)	3,318	2,968
Other Noncurrent Liabilities
Deferred income taxes	870	815
Asset retirement obligations	26	22
Regulatory liabilities	1,024	1,058
Operating lease liabilities	13	14
Accrued pension and other post-retirement benefit costs	7	7
Other (includes amounts related to VIEs)	180	158
Total other noncurrent liabilities	2,120	2,074
Commitments and Contingencies
Equity
Common stock	1,635	1,635
Retained earnings	2,037	1,714
Total Parent stockholders' equity	3,672	3,349
Noncontrolling interests	1
Total equity	3,673	3,349
Total Liabilities and Equity	$ 10,335	$ 9,382
Common stock, shares authorized (in shares)	100	100

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 40	$ 45
Regulatory Assets: Current	3,485	2,150
Current Assets: Other	1,067	584
Other Noncurrent Assets: Regulatory assets	14,645	12,487
Other (including amounts related to VIEs)	3,400	3,632
Current maturities of long-term debt	4,154	3,387
Long-term debt	67,061	60,448
Other (includes amounts related to VIEs)	$ 1,502	$ 1,348
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	770,000,000	769,000,000
Membership interests	$ 2,531	$ 1,840
Total pretax impact to Retained Earnings	51,853	51,136
Stockholders' Equity Attributable to Parent	49,322	49,296
VIEs
Allowance for doubtful accounts - receivables of VIEs	176	76
Regulatory Assets: Current	106	105
Current Assets: Other	116	41
Other Noncurrent Assets: Regulatory assets	1,715	1,824
Other (including amounts related to VIEs)	52	30
Current maturities of long-term debt	350	76
Long-term debt	$ 3,108	$ 3,379
Series A Preferred Stock
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	40,000,000	40,000,000
Preferred stock, depositary shares outstanding (in shares)	40,000,000	40,000,000
Series B Preferred Stock
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, depositary shares outstanding (in shares)	1,000,000	1,000,000
Duke Energy Carolinas
Allowance for doubtful accounts - receivables	$ 3	$ 1
Regulatory Assets: Current	1,095	544
Current Assets: Other	216	95
Other Noncurrent Assets: Regulatory assets	4,293	2,935
Other (including amounts related to VIEs)	1,036	1,248
Current maturities of long-term debt	1,018	362
Long-term debt	12,948	12,595
Other (includes amounts related to VIEs)	527	536
Duke Energy Carolinas | VIEs
Allowance for doubtful accounts - receivables of VIEs	65	41
Regulatory Assets: Current	12	12
Current Assets: Other	8
Other Noncurrent Assets: Regulatory assets	208	220
Current maturities of long-term debt	10	5
Long-term debt	689	703
Progress Energy
Allowance for doubtful accounts - receivables	13	11
Regulatory Assets: Current	1,833	1,030
Current Assets: Other	342	125
Other Noncurrent Assets: Regulatory assets	7,146	5,909
Other (including amounts related to VIEs)	1,066	1,242
Current maturities of long-term debt	697	1,082
Long-term debt	21,592	19,591
Other (includes amounts related to VIEs)	$ 222	$ 162
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Membership interests		$ 3
Total pretax impact to Retained Earnings	$ 21,406	17,148
Stockholders' Equity Attributable to Parent	21,406	17,145
Progress Energy | VIEs
Allowance for doubtful accounts - receivables of VIEs	68	25
Regulatory Assets: Current	94	93
Current Assets: Other	88	39
Other Noncurrent Assets: Regulatory assets	1,507	1,603
Current maturities of long-term debt	340	71
Long-term debt	2,003	2,293
Duke Energy Progress
Allowance for doubtful accounts - receivables	4	4
Regulatory Assets: Current	690	533
Current Assets: Other	174	83
Other Noncurrent Assets: Regulatory assets	4,724	4,118
Other (including amounts related to VIEs)	650	792
Current maturities of long-term debt	369	556
Long-term debt	10,568	9,543
Other (includes amounts related to VIEs)	76	87
Duke Energy Progress | VIEs
Allowance for doubtful accounts - receivables of VIEs	40	17
Regulatory Assets: Current	39	39
Current Assets: Other	42
Other Noncurrent Assets: Regulatory assets	681	720
Current maturities of long-term debt	34	15
Long-term debt	1,114	1,097
Duke Energy Florida
Allowance for doubtful accounts - receivables	8	8
Regulatory Assets: Current	1,143	497
Current Assets: Other	108	80
Other Noncurrent Assets: Regulatory assets	2,422	1,791
Other (including amounts related to VIEs)	372	399
Current maturities of long-term debt	328	76
Long-term debt	9,381	8,406
Other (includes amounts related to VIEs)	84	73
Duke Energy Florida | VIEs
Allowance for doubtful accounts - receivables of VIEs	28	8
Regulatory Assets: Current	55	54
Current Assets: Other	46	39
Other Noncurrent Assets: Regulatory assets	826	883
Current maturities of long-term debt	306	56
Long-term debt	890	1,196
Duke Energy Ohio
Allowance for doubtful accounts - receivables	6	4
Regulatory Assets: Current	103	72
Current Assets: Other	86	57
Other Noncurrent Assets: Regulatory assets	581	635
Other (including amounts related to VIEs)	71	84
Current maturities of long-term debt	475
Long-term debt	2,745	3,168
Other (includes amounts related to VIEs)	$ 96	$ 101
Common stock, par value (usd per share)	$ 8.50	$ 8.50
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares outstanding (in shares)	90,000,000	90,000,000
Stockholders' Equity Attributable to Parent	$ 4,766	$ 4,464
Duke Energy Indiana
Allowance for doubtful accounts - receivables	4	3
Regulatory Assets: Current	249	277
Current Assets: Other	197	68
Other Noncurrent Assets: Regulatory assets	875	1,278
Other (including amounts related to VIEs)	254	296
Current maturities of long-term debt	303	84
Long-term debt	3,854	4,089
Other (includes amounts related to VIEs)	65	44
Piedmont
Allowance for doubtful accounts - receivables	14	15
Regulatory Assets: Current	119	141
Current Assets: Other	4	9
Other Noncurrent Assets: Regulatory assets	392	316
Other (including amounts related to VIEs)	272	288
Current maturities of long-term debt	45	0
Long-term debt	3,318	2,968
Other (includes amounts related to VIEs)	$ 180	$ 158
Preferred stock, par value (in usd per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Membership interests	$ 1
Total pretax impact to Retained Earnings	3,673	$ 3,349
Stockholders' Equity Attributable to Parent	$ 3,672	$ 3,349

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 2,455	$ 3,579	$ 1,082
Net loss attributable to Duke Energy		2,550	3,908	1,377
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		5,843	5,663	5,486
Equity in (earnings) losses of unconsolidated affiliates		(114)	(28)	2,005
Equity component of AFUDC		(197)	(171)	(154)
Impairment of assets and other charges		2,183	356	984
Deferred income taxes		(200)	191	54
Contributions to qualified pension plans		(58)
Payments for asset retirement obligations		(584)	(540)	(610)
Provision for rate refunds		(130)	(70)	(22)
Refund of AMT credit carryforwards				572
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		19	50	63
Receivables		(788)	(297)	(56)
Inventory		(476)	(34)	66
Other current assets	[1]	(1,498)	(1,136)	205
Increase (decrease) in
Accounts payable		805	249	(21)
Taxes accrued		10	284	117
Other current liabilities		(153)	(13)	(65)
Other assets	[1]	(1,600)	112	(408)
Other liabilities		410	95	(442)
Net cash provided by (used in) operating activities		5,927	8,290	8,856
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(11,367)	(9,715)	(9,907)
Contributions to equity method investments		(58)	(81)	(370)
Return of investment capital		6	44	133
Purchases of debt and equity securities		(4,243)	(6,098)	(8,011)
Proceeds from sales and maturities of debt and equity securities		4,333	6,103	7,949
Disbursements to canceled equity method investments			(855)
Other		(644)	(333)	(398)
Net cash used in investing activities		(11,973)	(10,935)	(10,604)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		11,874	9,052	6,330
Proceeds from the issuance of common stock		9	5	2,745
Payments for the redemption of long-term debt		(4,396)	(5,294)	(4,506)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days		80	332	3,009
Payments for the redemption of short-term debt with original maturities greater than 90 days		(287)	(997)	(2,147)
Notes payable and commercial paper		781	1,144	(1,181)
Contributions from noncontrolling interests		1,377	1,575	426
Dividends paid		(3,179)	(3,114)	(2,812)
Other		(130)	(94)	(133)
Net cash provided by financing activities		6,129	2,609	1,731
Net increase (decrease) in cash, cash equivalents and restricted cash		83	(36)	(17)
Cash, cash equivalents and restricted cash at beginning of period		520	556	573
Cash, cash equivalents and restricted cash at end of period		603	520	556
Cash, cash equivalents and restricted cash at beginning of period		341
Cash, cash equivalents and restricted cash at end of period		409	341
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		2,361	2,248	2,186
Cash received from income taxes		(6)	(3)	(585)
Significant non-cash transactions:
Accrued capital expenditures		1,766	1,325	1,116
Non-cash dividends				110
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		1,600	1,336	956
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,787	1,743	1,731
Equity component of AFUDC		(98)	(65)	(62)
Impairment of assets and other charges		26	227	476
Deferred income taxes		210	(213)	(260)
Contributions to qualified pension plans		(15)
Payments for asset retirement obligations		(200)	(182)	(162)
Provision for rate refunds		(74)	(46)	(5)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions				(4)
Receivables		(102)	(99)	52
Receivables from affiliated companies		(200)	(66)	(10)
Inventory		(138)	(16)	(14)
Other current assets	[2]	(592)	(309)	209
Increase (decrease) in
Accounts payable		377	5	55
Accounts payable to affiliated companies		(75)	85	(11)
Taxes accrued		(46)	206	30
Other current liabilities		(91)	(39)	(56)
Other assets	[2]	(764)	21	(102)
Other liabilities		(36)	116	(47)
Net cash provided by (used in) operating activities		1,569	2,704	2,776
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(3,304)	(2,693)	(2,669)
Purchases of debt and equity securities		(2,633)	(3,425)	(1,602)
Proceeds from sales and maturities of debt and equity securities		2,633	3,425	1,602
Other		(181)	(177)	(164)
Net cash used in investing activities		(3,485)	(2,870)	(2,833)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,441	1,651	998
Payments for the redemption of long-term debt		(436)	(617)	(813)
Notes payable to affiliated companies		1,007	(280)	477
Distributions to parent		(50)	(600)	(600)
Other		(1)	(1)	(2)
Net cash provided by financing activities		1,961	153	60
Net increase (decrease) in cash, cash equivalents and restricted cash		45	(13)	3
Cash, cash equivalents and restricted cash at beginning of period		8	21	18
Cash, cash equivalents and restricted cash at end of period		53	8	21
Cash, cash equivalents and restricted cash at beginning of period		7
Cash, cash equivalents and restricted cash at end of period		44	7
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		546	508	481
Cash received from income taxes		(60)	233	321
Significant non-cash transactions:
Accrued capital expenditures		475	359	365
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		1,828	1,599	1,046
Net loss attributable to Duke Energy		1,828	1,598	1,045
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		2,405	2,302	2,327
Equity component of AFUDC		(68)	(51)	(42)
Impairment of assets and other charges		12	82	495
Deferred income taxes		364	247	(197)
Contributions to qualified pension plans		(13)
Payments for asset retirement obligations		(291)	(288)	(384)
Provision for rate refunds		(58)	(36)	2
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			51	(9)
Receivables		(322)	(97)	(69)
Receivables from affiliated companies		117	18	(81)
Inventory		(183)	(26)	49
Other current assets	[3]	(937)	(551)	223
Increase (decrease) in
Accounts payable		222	59	(62)
Accounts payable to affiliated companies		206	217	(21)
Taxes accrued		8	13	75
Other current liabilities		96	(32)	139
Other assets	[3]	(1,116)	(110)	(137)
Other liabilities		573	(99)	(177)
Net cash provided by (used in) operating activities		2,843	3,298	3,177
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(4,317)	(3,668)	(3,488)
Purchases of debt and equity securities		(1,341)	(2,233)	(5,998)
Proceeds from sales and maturities of debt and equity securities		1,417	2,322	6,010
Notes receivable from affiliated companies			0	164
Other		(137)	(156)	(160)
Net cash used in investing activities		(4,378)	(3,735)	(3,472)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		2,775	3,095	1,791
Payments for the redemption of long-term debt		(1,173)	(1,883)	(2,157)
Notes payable to affiliated companies		465	(160)	1,148
Dividends to parent		(425)	(700)	(400)
Other		(36)	(2)	(13)
Net cash provided by financing activities		1,606	350	369
Net increase (decrease) in cash, cash equivalents and restricted cash		71	(87)	74
Cash, cash equivalents and restricted cash at beginning of period		113	200	126
Cash, cash equivalents and restricted cash at end of period		184	113	200
Cash, cash equivalents and restricted cash at beginning of period		70
Cash, cash equivalents and restricted cash at end of period		108	70
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		854	813	819
Cash received from income taxes		79	14	149
Significant non-cash transactions:
Accrued capital expenditures		663	501	363
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		1,008	991	415
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,371	1,286	1,299
Equity component of AFUDC		(52)	(34)	(29)
Impairment of assets and other charges		7	63	499
Deferred income taxes		121	(46)	(234)
Contributions to qualified pension plans		(8)
Payments for asset retirement obligations		(193)	(187)	(304)
Provision for rate refunds		(58)	(36)	2
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			48	1
Receivables		(228)	(52)	(4)
Receivables from affiliated companies		58	(33)	2
Inventory		(85)	(11)	23
Other current assets	[4]	(207)	(147)	98
Increase (decrease) in
Accounts payable		20	12	(127)
Accounts payable to affiliated companies		198	95	12
Taxes accrued		(86)	83	68
Other current liabilities		13	(23)	157
Other assets	[4]	(416)	(37)	(215)
Other liabilities		38	(16)	3
Net cash provided by (used in) operating activities		1,501	1,956	1,666
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(2,070)	(1,746)	(1,581)
Purchases of debt and equity securities		(1,148)	(1,931)	(1,555)
Proceeds from sales and maturities of debt and equity securities		1,138	1,914	1,516
Other		(29)	(20)	(57)
Net cash used in investing activities		(2,109)	(1,783)	(1,677)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,477	1,959	1,296
Payments for the redemption of long-term debt		(645)	(1,308)	(1,085)
Notes payable to affiliated companies		67	(123)	229
Distributions to parent		(250)	(700)	(400)
Other		(1)	(1)	(12)
Net cash provided by financing activities		648	(173)	28
Net increase (decrease) in cash, cash equivalents and restricted cash		40	0	17
Cash, cash equivalents and restricted cash at beginning of period		39	39	22
Cash, cash equivalents and restricted cash at end of period		79	39	39
Cash, cash equivalents and restricted cash at beginning of period		35
Cash, cash equivalents and restricted cash at end of period		49	35
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		386	335	301
Cash received from income taxes		157	83	123
Significant non-cash transactions:
Accrued capital expenditures		269	163	149
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		909	738	771
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,032	1,011	1,019
Equity component of AFUDC		(16)	(16)	(12)
Impairment of assets and other charges		4	19	(4)
Deferred income taxes		285	279	27
Contributions to qualified pension plans		(5)
Payments for asset retirement obligations		(98)	(101)	(80)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			0	(14)
Receivables		(93)	(45)	(64)
Receivables from affiliated companies		14	(13)	(3)
Inventory		(98)	(15)	26
Other current assets	[5]	(640)	(451)	40
Increase (decrease) in
Accounts payable		202	47	66
Accounts payable to affiliated companies		(32)	124	(46)
Taxes accrued		2	(30)	39
Other current liabilities		62	(7)	(7)
Other assets	[5]	(704)	(69)	84
Other liabilities		18	(69)	(181)
Net cash provided by (used in) operating activities		842	1,402	1,661
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(2,247)	(1,923)	(1,907)
Purchases of debt and equity securities		(193)	(302)	(4,443)
Proceeds from sales and maturities of debt and equity securities		279	408	4,495
Notes receivable from affiliated companies				173
Other		(108)	(136)	(103)
Net cash used in investing activities		(2,269)	(1,953)	(1,785)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,298	1,135	495
Payments for the redemption of long-term debt		(77)	(575)	(572)
Notes payable to affiliated companies		406	3	196
Distributions to parent		(175)
Other		(1)		(1)
Net cash provided by financing activities		1,451	563	118
Net increase (decrease) in cash, cash equivalents and restricted cash		24	12	(6)
Cash, cash equivalents and restricted cash at beginning of period		62	50	56
Cash, cash equivalents and restricted cash at end of period		86	62	50
Cash, cash equivalents and restricted cash at beginning of period		23
Cash, cash equivalents and restricted cash at end of period		45	23
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		339	308	321
Cash received from income taxes		(83)	(15)	138
Significant non-cash transactions:
Accrued capital expenditures		394	337	214
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		302	204	252
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		328	311	283
Equity component of AFUDC		(7)	(7)	(7)
Impairment of assets and other charges		(10)	25
Deferred income taxes		(22)	42	31
Contributions to qualified pension plans		(3)
Payments for asset retirement obligations		(12)	(2)	(2)
Provision for rate refunds		5	16	14
(Increase) decrease in
Receivables		23	6	(13)
Receivables from affiliated companies		(5)	(25)	9
Inventory		(28)	(6)	25
Other current assets		(55)	(60)	(18)
Increase (decrease) in
Accounts payable		44	38	2
Accounts payable to affiliated companies		8	(4)
Taxes accrued		42	26	30
Other current liabilities		(63)	11	3
Other assets		(29)	(43)	(32)
Other liabilities		64	27	(2)
Net cash provided by (used in) operating activities		582	559	575
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(850)	(848)	(834)
Notes receivable from affiliated companies		(105)	(10)	(19)
Other		(67)	(60)	(48)
Net cash used in investing activities		(1,022)	(918)	(901)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		50	150	467
Payments for the redemption of long-term debt			(50)
Notes payable to affiliated companies		395	(67)	(144)
Contribution from parent			325
Other		(2)
Net cash provided by financing activities		443	358	323
Net increase (decrease) in cash, cash equivalents and restricted cash		3	(1)	(3)
Cash, cash equivalents and restricted cash at beginning of period		13	14	17
Cash, cash equivalents and restricted cash at end of period		16	13	14
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		126	107	97
Cash received from income taxes		(35)	9
Significant non-cash transactions:
Accrued capital expenditures		123	135	104
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		137	481	408
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		648	619	572
Equity component of AFUDC		(13)	(27)	(23)
Impairment of assets and other charges		388	9
Deferred income taxes		(64)	34	29
Contributions to qualified pension plans		(5)
Payments for asset retirement obligations		(82)	(67)	(63)
(Increase) decrease in
Receivables		(3)	(33)	8
Receivables from affiliated companies		20
Inventory		(70)	55	44
Other current assets		(3)	(181)	(3)
Increase (decrease) in
Accounts payable		105	76	(12)
Accounts payable to affiliated companies		(3)	8	1
Taxes accrued		34	12	13
Other current liabilities		9	13	6
Other assets		(10)	20	(68)
Other liabilities		13	(15)	26
Net cash provided by (used in) operating activities		1,101	1,004	938
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(877)	(818)	(888)
Purchases of debt and equity securities		(61)	(142)	(37)
Proceeds from sales and maturities of debt and equity securities		48	65	22
Notes receivable from affiliated companies		(86)	(120)	(33)
Other		(55)	36	48
Net cash used in investing activities		(1,031)	(979)	(888)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		67	300	544
Payments for the redemption of long-term debt		(84)	(70)	(513)
Notes payable to affiliated companies		435	(131)	101
Distributions to parent		(462)	(125)	(200)
Other		(1)
Net cash provided by financing activities		(45)	(26)	(68)
Net increase (decrease) in cash, cash equivalents and restricted cash		25	(1)	(18)
Cash, cash equivalents and restricted cash at beginning of period		6	7	25
Cash, cash equivalents and restricted cash at end of period		31	6	7
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		186	194	164
Cash received from income taxes		35	56	36
Significant non-cash transactions:
Accrued capital expenditures		122	118	101
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		323	310	273
Net loss attributable to Duke Energy		323	310	273
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		225	216	182
Equity in (earnings) losses of unconsolidated affiliates		(8)	(9)	(9)
Equity component of AFUDC		(11)	(20)	(19)
(Gains) Losses on sales of other assets		(4)	0	0
Impairment of assets and other charges		18	10	7
Deferred income taxes		5	4	53
Contributions to qualified pension plans		(2)
Provision for rate refunds		(3)	(4)	(33)
(Increase) decrease in
Receivables		(111)	(77)	10
Receivables from affiliated companies			(1)
Inventory		(63)	(40)	3
Other current assets		32	33	(66)
Increase (decrease) in
Accounts payable		40	(25)	16
Accounts payable to affiliated companies		11	(39)	76
Taxes accrued		11	37	3
Other current liabilities		36	(26)	(11)
Other assets		9	26	(11)
Other liabilities		(1)	(4)	7
Net cash provided by (used in) operating activities		507	391	481
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(862)	(850)	(901)
Contributions to equity method investments		(8)	(9)
Other		(26)	(31)	(28)
Net cash used in investing activities		(896)	(890)	(929)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		394	347	394
Payments for the redemption of long-term debt			(160)
Notes payable to affiliated companies		(4)	(13)	54
Contribution from parent			325
Other		(1)
Net cash provided by financing activities		389	499	448
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		135	114	115
Cash received from income taxes		23	(13)	(36)
Significant non-cash transactions:
Accrued capital expenditures		$ 207	$ 97	$ 106
[1]Includes approximately $2.6 billion for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.[2]Includes approximately $1.3 billion for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.[3]Includes approximately $1.3 billion for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.[4]Includes approximately $402 million for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.[5]Includes approximately $942 million for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Under-collected deferred fuel regulatory assets	$ 2,600
Duke Energy Carolinas
Under-collected deferred fuel regulatory assets	1,300
Progress Energy
Under-collected deferred fuel regulatory assets	1,300
Duke Energy Progress
Under-collected deferred fuel regulatory assets	402
Duke Energy Florida
Under-collected deferred fuel regulatory assets	$ 942

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions		Total		Common Stockholders' Equity		Preferred Stock	Common Stock	Additional Paid In Capital		Retained Earnings		Net Gains (Losses) on Cash Flow Hedges	[1]	Net Unrealized Gains (Losses) on Available-for-Sale Securities	Pension and OPEB Adjustments	Noncontrolling Interests		Duke Energy Carolinas		Duke Energy Carolinas Members Equity		Duke Energy Carolinas Net Gains (Losses) on Cash Flow Hedges	Progress Energy	Progress Energy Common Stockholders' Equity	Progress Energy Additional Paid In Capital	Progress Energy Retained Earnings	Progress Energy Net Gains (Losses) on Cash Flow Hedges	Progress Energy Net Unrealized Gains (Losses) on Available-for-Sale Securities	Progress Energy Pension and OPEB Adjustments	Progress Energy Noncontrolling Interests	Duke Energy Progress	Duke Energy Progress Members Equity	Duke Energy Florida	Duke Energy Florida Members Equity	Duke Energy Florida Net Unrealized Gains (Losses) on Available-for-Sale Securities	Duke Energy Ohio	Duke Energy Ohio Common Stock	Duke Energy Ohio Additional Paid In Capital	Duke Energy Ohio Retained Earnings	Duke Energy Indiana	Duke Energy Indiana Members Equity	Duke Energy Indiana Pension and OPEB Adjustments	Piedmont	Piedmont Common Stockholders' Equity	Piedmont Common Stock	Piedmont Retained Earnings	Piedmont Noncontrolling Interests	Common Stock	Common Stock Common Stockholders' Equity	Common Stock Common Stock	Common Stock Additional Paid In Capital
Beginning Balance (parent) at Dec. 31, 2019		$ 47,951																					$ 15,593																				$ 2,443
Beginning Members' Equity at Dec. 31, 2019																		$ 12,811		$ 12,818		$ (7)										$ 9,246	$ 6,788	$ 6,789	$ (1)					$ 4,575	$ 4,575
Ending Balance (Attributable to Parent) at Dec. 31, 2020				$ 47,964		$ 1,962	$ 1	$ 43,767		$ 2,471		$ (167)		$ 6	$ (76)									$ 16,237	$ 9,143	$ 7,109	$ (5)	$ (2)	$ (8)							$ 3,935	$ 762	$ 2,776	$ 397					$ 2,715	$ 1,310	$ 1,405
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2019																$ 1,129														$ 3																	$ 0
Beginning Balance (Attributable to Parent) at Dec. 31, 2019				46,822		1,962	1	40,881		4,108		(51)		3	(82)									15,590	9,143	6,465	(10)	(1)	(7)							3,683	762	2,776	145					2,443	1,310	1,133
Balance (in shares) at Dec. 31, 2019																																																		733,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		975														(295)
Net income		1,082																					1,046	1,045		1,045				1													273	273		273
Net income (loss)		1,377		1,270						1,270								956		956			1,045								$ 415	415	771	771		252			252	408	408		273
Other comprehensive (loss) income		(118)	[2]	(107)								(116)		3	6	(11)							3	3			5	(1)	(1)				(1)		(1)
Common stock issuances, including dividend reinvestment and employee benefits																																																$ 2,902	$ 2,902		$ 2,902
Common stock issuances, including dividend reinvestment and employee benefits (in shares)																																																		36,000,000
Common stock dividends		(2,815)		(2,815)						(2,815)								(600)		(600)			(400)	(400)		(400)						(400)								(200)	(200)
Contribution from noncontrolling interest, net of transaction costs(a)		409	[3]	(17)	[3]			(17)	[3]							426	[3]															(1)
Distributions to noncontrolling interest in subsidiaries		(30)														(30)
Other		(90)	[4]	(91)	[4]			1	[4]	(92)	[4]					1	[4]	(13)	[5]	(13)	[5]		(1)	(1)		(1)																	(1)	(1)		(1)
Ending Balance (parent) at Dec. 31, 2020		49,184																					16,241																				2,715
Ending Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2020																1,220														4																	0
Ending Member's Equity at Dec. 31, 2020																		13,154		13,161		(7)										9,260	7,558	7,560	(2)					4,783	4,783
Balance (in shares) at Dec. 31, 2020																																																		769,000,000
Ending Balance (Attributable to Parent) at Dec. 31, 2021		49,296		49,296		1,962	1	44,371		3,265		(232)		(2)	(69)								17,145	17,145	9,149	8,007	(2)	(2)	(7)							4,464	762	3,100	602				3,349	3,349	1,635	1,714
Beginning Balance (Attributable to Parent) at Dec. 31, 2020				47,964		1,962	1	43,767		2,471		(167)		6	(76)									16,237	9,143	7,109	(5)	(2)	(8)							3,935	762	2,776	397					2,715	1,310	1,405
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		3,473														(329)
Net income		3,579																					1,599	1,598		1,598				1													310	310		310
Net income (loss)		3,908		3,802						3,802								1,336		1,336			1,598								991	991	738	738		204			204	481	481		310
Other comprehensive (loss) income		(56)	[2]	(66)								(65)		(8)	7	10		1				1	4	4			3		1				(1)		(1)
Common stock issuances, including dividend reinvestment and employee benefits																																																68	68		68
Common stock dividends		(3,008)		(3,008)						(3,008)								(600)		(600)			(700)	(700)		(700)						(700)								(250)	(250)
Sale of noncontrolling interest	[6]	999		545				545								454
Contribution from noncontrolling interest, net of transaction costs(a)	[3]	550														550
Distributions to noncontrolling interest in subsidiaries		(66)														(66)							(1)							(1)
Contribution from parent																																				$ 325		325					325	325	325
Other		(8)		(9)				(9)								1							5	6	6					(1)								(1)	1	1	1		(1)	(1)		(1)
Ending Balance (parent) at Dec. 31, 2021		51,136																					17,148																				$ 3,349
Ending Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2021		$ 1,840														1,840							$ 3							3																	0
Ending Member's Equity at Dec. 31, 2021																		13,891		13,897		(6)									9,551	9,551	8,295	8,298	(3)					5,015	5,015
Balance (in shares) at Dec. 31, 2021		769,000,000																					100													90,000,000							100							769,000,000
Ending Balance (Attributable to Parent) at Dec. 31, 2022		$ 49,322		49,322		1,962	1	44,862		2,637		(29)		(23)	(88)								$ 21,406	21,406	11,832	9,585	(1)	(8)	(2)							$ 4,766	762	3,100	904				$ 3,672	3,672	1,635	2,037
Beginning Balance (Attributable to Parent) at Dec. 31, 2021		49,296		49,296		$ 1,962	$ 1	44,371		3,265		(232)		(2)	(69)								17,145	17,145	9,149	8,007	(2)	(2)	(7)							4,464	$ 762	$ 3,100	602				3,349	3,349	$ 1,635	1,714
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		2,349														(95)
Net income		2,455																					1,828	1,828		1,828																	323	$ 323		$ 323
Net income (loss)		2,550		2,444						2,444								1,600		1,600			1,828								1,008	1,008	909	909		$ 302			$ 302	137	137		323
Other comprehensive (loss) income		174	[2]	163								$ 203		$ (21)	$ (19)	11							0				$ 1	$ (6)	$ 5				(5)		(5)
Common stock issuances, including dividend reinvestment and employee benefits																																																$ 76	$ 76		$ 76
Common stock issuances, including dividend reinvestment and employee benefits (in shares)																																																		1,000,000
Common stock dividends		(3,073)		(3,073)						(3,073)								(50)		(50)			(425)	(425)	(175)	$ (250)						(250)	(175)	(175)						(450)	(450)
Sale of noncontrolling interest	[6]	1,034		465				465								569
Contribution from noncontrolling interest, net of transaction costs(a)	[3]	314														314
Distributions to noncontrolling interest in subsidiaries		(140)														(140)							(34)							(34)
Equitization of certain notes payable to affiliates																							2,907	2,907	2,907
Purchase of a noncontrolling interest		(20)		(51)				(51)								31							(20)	(51)	(51)					31
Other		3		$ 2				$ 1		$ 1						1		1		1			2	$ 2	$ 2								(1)	(1)						1		$ 1	1				1
Ending Balance (parent) at Dec. 31, 2022		51,853																					$ 21,406																				3,673
Ending Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022		$ 2,531														$ 2,531														$ 0													$ 1				$ 1
Ending Member's Equity at Dec. 31, 2022																		$ 15,442		$ 15,448		$ (6)									$ 10,309	$ 10,309	$ 9,023	$ 9,031	$ (8)					$ 4,703	$ 4,702	$ 1
Balance (in shares) at Dec. 31, 2022		770,000,000																					100													90,000,000							100							770,000,000
[1]See Duke Energy Consolidated Statements of Comprehensive Income for detailed activity related to Cash Flow and Fair Value Hedges.[2]Net of income tax expense of approximately $52 million for the year ended December 31, 2022, and income tax benefit of approximately $17 million and $35 million for the years ended December 31, 2021, and 2020, respectively.[3]Relates to tax equity financing activity in the Commercial Renewables Disposal Groups.[4]Amounts in Retained earnings primarily represent impacts due to implementation of a new accounting standard related to Current Estimated Credit Losses. See Note 1 for additional discussion.[5]Amounts primarily represent impacts due to implementation of a new accounting standard related to Credit Losses. See Note 1 for additional discussion.[6]Relates primarily to the sale of a noncontrolling interest in Duke Energy Indiana. See Note 2 for additional discussion.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations and Basis of Consolidation Duke Energy is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the FERC and other regulatory agencies listed below. Duke Energy operates in the U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas; Progress Energy; Duke Energy Progress; Duke Energy Florida; Duke Energy Ohio; Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself. These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 18 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 9 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting. Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC. Progress Energy is a public utility holding company, which conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below. Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC. Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC. Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is recovered from retail customers and recorded in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the PUCO, KPSC and FERC. Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC. Piedmont is a regulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC and FERC. Certain prior year amounts have been reclassified to conform to the current year presentation. Other Current Assets and Liabilities The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5% of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2022, or 2021. December 31, (in millions) Location 2022 2021 Duke Energy Accrued compensation Current Liabilities $ 778 $ 915 Duke Energy Carolinas Accrued compensation Current Liabilities $ 247 $ 277 Duke Energy Progress Customer deposits Current Liabilities $ 106 $ 144 Other accrued liabilities Current Liabilities 124 163 Duke Energy Florida Customer deposits Current Liabilities $ 200 $ 200 Other accrued liabilities Current Liabilities 61 89 Duke Energy Ohio Gas Storage Current Assets $ 57 $ 25 Collateral liabilities Current Liabilities 53 57 Duke Energy Indiana Mark-to-market transactions Current Assets $ 110 $ 23 Discontinued Operations Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. For the years ended December 31, 2022, 2021 and 2020, the Loss From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations includes amounts related to noncontrolling interests. A portion of Noncontrolling interests on Duke Energy's Consolidated Balance Sheets relates to discontinued operations for the periods presented. See Note 2 for discussion of discontinued operations related to the Commercial Renewables Disposal Groups. Noncontrolling Interest Duke Energy maintains a controlling financial interest in certain less than wholly owned regulated and nonregulated subsidiaries. As a result, Duke Energy consolidates these subsidiaries and presents the third-party investors' portion of Duke Energy's net income (loss), net assets and comprehensive income (loss) as noncontrolling interest. Noncontrolling interest is included as a component of equity on the Consolidated Balance Sheet. Operating agreements of Duke Energy's subsidiaries with noncontrolling interest allocate profit and loss based on their pro rata shares of the ownership interest in the respective subsidiary. Therefore, Duke Energy allocates net income or loss and other comprehensive income or loss of these subsidiaries to the owners based on their pro rata shares. Significant Accounting Policies Use of Estimates In preparing financial statements that conform to GAAP, the Duke Energy Registrants must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. Regulatory Accounting The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or FERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. Regulatory assets are reviewed for recoverability each reporting period. If a regulatory asset is no longer deemed probable of recovery, the deferred cost is charged to earnings. See Note 4 for further information. Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery. When it becomes probable that regulated generation, transmission or distribution assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment charge for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash flows. The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities. Cash, Cash Equivalents and Restricted Cash All highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents. Duke Energy, Progress Energy and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. Duke Energy Carolinas and Duke Energy Progress have restricted cash balances related to VIEs from storm recovery bonds issued. See Note 18 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets. December 31, 2022 Duke Duke Duke Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 409 $ 44 $ 108 $ 49 $ 45 Other 173 8 74 28 41 Other Noncurrent Assets Other 11 1 2 2 — Total cash, cash equivalents and restricted cash $ 593 $ 53 $ 184 $ 79 $ 86 December 31, 2021 Duke Duke Duke Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 341 $ 7 $ 70 $ 35 $ 23 Other 170 — 39 — 39 Other Noncurrent Assets Other 6 1 4 4 — Total cash, cash equivalents and restricted cash $ 517 $ 8 $ 113 $ 39 $ 62 Inventory Inventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Inventory is charged to expense or capitalized to property, plant and equipment when issued, primarily using the average cost method. Excess or obsolete inventory is written down to the lower of cost or net realizable value. Once inventory has been written down, it creates a new cost basis for the inventory that is not subsequently written up. Provisions for inventory write-offs were not material at December 31, 2022, and 2021, respectively. The components of inventory are presented in the tables below. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,604 $ 876 $ 1,232 $ 819 $ 413 $ 105 $ 342 $ 12 Coal 620 253 190 99 91 34 144 — Natural gas, oil and other 360 35 157 88 69 5 3 160 Total inventory $ 3,584 $ 1,164 $ 1,579 $ 1,006 $ 573 $ 144 $ 489 $ 172 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,309 $ 793 $ 1,067 $ 729 $ 338 $ 80 $ 311 $ 14 Coal 486 195 167 94 73 19 105 — Natural gas, oil and other 316 38 164 98 66 17 2 95 Total inventory $ 3,111 $ 1,026 $ 1,398 $ 921 $ 477 $ 116 $ 418 $ 109 Investments in Debt and Equity Securities The Duke Energy Registrants classify investments in equity securities as FV-NI and investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in AOCI until realized, unless it is determined the carrying value of an investment has a credit loss. For certain investments of regulated operations, such as substantially all of the NDTF, realized and unrealized gains and losses (including any credit losses) on debt securities are recorded as a regulatory asset or liability. The credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity. See Note 16 for further information. Goodwill Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be a business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 12 for further information. Intangible Assets Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an amortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced. RECs are used to measure compliance with renewable energy standards and are held primarily for consumption. See Note 12 for further information. Long-Lived Asset Impairments The Duke Energy Registrants evaluate long-lived assets that are held and used, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the long-lived asset is not recoverable based on these estimated future undiscounted cash flows, the carrying value of the asset is written down to its then current estimated fair value and an impairment charge is recognized. The Duke Energy Registrants assess fair value of long-lived assets that are held and used using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are not limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset. Property, Plant and Equipment Property, plant and equipment are stated at the lower of depreciated historical cost net of any disallowances or fair value, if impaired. The Duke Energy Registrants capitalize all construction-related direct labor and material costs, as well as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction and Interest Capitalized” section below for information on capitalized financing costs. Costs of renewals and betterments that extend the useful life of property, plant and equipment are also capitalized. The cost of repairs, replacements and major maintenance projects, which do not extend the useful life or increase the expected output of the asset, are expensed as incurred. Depreciation is generally computed over the estimated useful life of the asset using the composite straight-line method. Depreciation studies are conducted periodically to update composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows. Years Ended December 31, 2022 2021 2020 Duke Energy 3.0 % 2.9 % 3.0 % Duke Energy Carolinas 2.7 % 2.7 % 2.8 % Progress Energy 3.2 % 3.1 % 3.2 % Duke Energy Progress 3.0 % 3.0 % 3.1 % Duke Energy Florida 3.5 % 3.3 % 3.3 % Duke Energy Ohio 2.9 % 2.9 % 2.9 % Duke Energy Indiana 3.6 % 3.6 % 3.5 % Piedmont 2.1 % 2.1 % 2.3 % In general, when the Duke Energy Registrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in advance of its original expected useful life or is abandoned, the cost of the asset and the corresponding accumulated depreciation is recognized as a separate asset. If the asset is still in operation, the net amount is classified as Facilities to be retired, net on the Consolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of long-lived asset impairments above). The carrying value of the asset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, an impairment is recognized to the extent the net book value of the asset exceeds the present value of future revenues discounted at the incremental borrowing rate. When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body. See Note 11 for additional information. Other Noncurrent Assets Duke Energy, through a nonregulated subsidiary, was the winner of the Carolina Long Bay offshore wind auction in May 2022 and recorded an asset of $150 million related to the contract in Other within Other noncurrent assets. In November 2022, Duke Energy committed to a plan to sell the Commercial Renewables business segment, excluding the offshore wind contract for Carolina Long Bay, which was moved to the Electric Utilities and Infrastructure (EU&I) segment. See Notes 2 and 3 for further information. Leases Duke Energy determines if an arrangement is a lease at contract inception based on whether the arrangement involves the use of a physically distinct identified asset and whether Duke Energy has the right to obtain substantially all of the economic benefits from the use of the asset throughout the period as well as the right to direct the use of the asset. As a policy election, Duke Energy does not evaluate arrangements with initial contract terms of less than one year as leases. Operating leases are included in Operating lease ROU assets, net, Other current liabilities and Operating lease liabilities on the Consolidated Balance Sheets. Finance leases are included in Property, plant and equipment, Current maturities of long-term debt and Long-Term Debt on the Consolidated Balance Sheets. For lessee and lessor arrangements, Duke Energy has elected a policy to not separate lease and non-lease components for all asset classes. For lessor arrangements, lease and non-lease components are only combined under one arrangement and accounted for under the lease accounting framework if the non-lease components are not the predominant component of the arrangement and the lease component would be classified as an operating lease. Nuclear Fuel Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets. Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method. Allowance for Funds Used During Construction and Interest Capitalized For regulated operations, the debt and equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets. AFUDC equity, a permanent difference for income taxes, reduces the ETR when capitalized and increases the ETR when depreciated or amortized. See Note 24 for additional information. Asset Retirement Obligations AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be probable of recovery. The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or liability. Accounts Payable During 2020, Duke Energy established a supply chain finance program (the “program”) with a global financial institution. The program is voluntary and allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to the financial institution at a rate that leverages Duke Energy’s credit rating and, which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program, determine at their sole discretion which invoices they will sell to the financial institution. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms, which are based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program. The following table presents the outstanding accounts payable balance sold to the financial institution by our suppliers and the supplier invoices sold to the financial institution under the program included within Net cash provided by operating activities on the Consolidated Statements of Cash Flows as of December 31, 2022, and December 31, 2021. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Outstanding Accounts Payable Balance Sold $ 87 $ 6 $ 19 $ 8 $ 11 $ 5 $ — $ 57 Suppliers Invoices Settled Through The Program 301 29 85 26 59 38 2 147 December 30, 2021 Duke Duke Duke Progress Energy Energy (in millions) Energy Energy Florida Ohio Piedmont Outstanding Accounts Payable Balance Sold $ 19 $ 9 $ 9 $ 6 $ 4 Suppliers Invoices Settled Through The Program 122 10 10 12 100 Revenue Recognition Duke Energy recognizes revenue as customers obtain control of promised goods and services in an amount that reflects consideration expected in exchange for those goods or services. Generally, the delivery of electricity and natural gas results in the transfer of control to customers at the time the commodity is delivered and the amount of revenue recognized is equal to the amount billed to each customer, including estimated volumes delivered when billings have not yet occurred. See Note 19 for further information. Derivatives and Hedging Derivative and non-derivative instruments may be used in connection with commodity price and interest rate activities, including swaps, futures, forwards and options. All derivative instruments, except those that qualify for the NPNS exception, are recorded on the Consolidated Balance Sheets at fair value. Qualifying derivative instruments may be designated as either cash flow hedges or fair value hedges. Other derivative instruments (undesignated contracts) either have not been designated or do not qualify as hedges. The effective portion of the change in the fair value of cash flow hedges is recorded in AOCI. The effective portion of the change in the fair value of a fair value hedge is offset in net income by changes in the hedged item. For activity subject to regulatory accounting, gains and losses on derivative contracts are reflected as regulatory assets or liabilities and not as other comprehensive income or current period income. As a result, changes in fair value of these derivatives have no immediate earnings impact. Formal documentation, including transaction type and risk management strategy, is maintained for all contracts accounted for as a hedge. At inception and at least every three months thereafter, the hedge contract is assessed to see if it is highly effective in offsetting changes in cash flows or fair values of hedged items. See Note 15 for further information. Captive Insurance Reserves Duke Energy has captive insurance subsidiaries that provide coverage, on an indemnity basis, to the Subsidiary Registrants as well as certain third parties, on a limited basis, for financial losses, primarily related to property, workers’ compensation and general liability. Liabilities include provisions for estimated losses incurred but not reported (IBNR), as well as estimated provisions for known claims. IBNR reserve estimates are primarily based upon historical loss experience, industry data and other actuarial assumptions. Reserve estimates are adjusted in future periods as actual losses differ from experience. Duke Energy, through its captive insurance entities, also has reinsurance coverage with third parties for certain losses above a per occurrence and/or aggregate retention. Receivables for reinsurance coverage are recognized when realization is deemed probable. Preferred Stock Preferred stock is reviewed to determine the appropriate balance sheet classification and embedded features, such as call options, are evaluated to determine if they should be bifurcated and accounted for separately. Costs directly related to the issuance of preferred stock are recorded as a reduction of the proceeds received. The liability for the dividend is recognized when declared. The accumulated dividends on the cumulative preferred stock is recognized to net income available to Duke Energy Corporation in the EPS calculation. See Note 20 for further information. Loss Contingencies and Environmental Liabilities Contingent losses are recorded when it is probable a loss has occurred and the loss can be reasonably estimated. When a range of the probable loss exists and no amount within the range is a better estimate than any other amount, the minimum amount in the range is recorded. Unless otherwise required by GAAP, legal fees are expensed as incurred. Environmental liabilities are recorded on an undiscounted basis when environmental remediation or other liabilities become probable and can be reasonably estimated. Environmental expenditures related to past operations that do not generate current or future revenues are expensed. Environmental expenditures related to operations that generate current or future revenues are expensed or capitalized, as appropriate. Certain environmental expenditures receive regulatory accounting treatment and are recorded as regulatory assets. See Notes 4 and 5 for further information. Severance and Special Termination Benefits Duke Energy maintains severance plans for the general employee population under which, in general, the longer a terminated employee worked prior to termination the greater the amount of severance benefits provided. A liability for involuntary severance is recorded once an involuntary severance plan is committed to by management if involuntary severances are probable and can be reasonably estimated. For involuntary severance benefits incremental to its ongoing severance plan benefits, the fair value of the obligation is expensed at the communication date if there are no future service requirements or over the required future service period. Duke Energy also offers special termination benefits under voluntary severance programs. Special termination benefits are recorded immediately upon employee acceptance absent a significant retention period. Otherwise, the cost is recorded over the remaining service period. Employee acceptance of voluntary severance benefits is determined by management based on the facts and circumstances of the benefits being offered. See Note 21 for further information. Guarantees If necessary, liabilities are recognized at the time of issuance or material modification of a guarantee for the estimated fair value of the obligation it assumes. Fair value is estimated using a probability weighted approach. The obligation is reduced over the term of the guarantee or related contract in a systematic and rational method as risk is reduced. Duke Energy recognizes a liability for the best estimate of its loss due to the nonperformance of the guaranteed party. This liability is recognized at the inception of a guarantee and is updated periodically. See Note 8 for further information. Income Taxes Duke Energy and its subsidiaries file a consolidated federal income tax return and other state and foreign jurisdictional returns. The Subsidiary

Dispositions

Dispositions	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	DISPOSITIONS The following table summarizes the Loss from Discontinued Operations, net of tax recorded on Duke Energy's Consolidated Statements of Operations: Years Ended December 31, (in millions) 2022 2021 2020 Commercial Renewables Disposal Groups $ (1,349) $ (151) $ (14) Other (a) 26 7 7 Loss from Discontinued Operations, net of tax $ (1,323) $ (144) $ (7) (a) Amount represents an income tax benefit resulting from tax adjustments for previously sold businesses not related to the Commercial Renewables Disposal Groups. Sale of Commercial Renewables Segment In August 2022, Duke Energy announced a strategic review of its commercial renewables business. Since 2007, Duke Energy has built a portfolio of commercial wind, solar and battery projects across the U.S., and established a development pipeline. Duke Energy has developed a strategy to focus on renewables, grid and other investment opportunities within its regulated operations. In November 2022, Duke Energy committed to a plan to sell the Commercial Renewables business segment, excluding the offshore wind contract for Carolina Long Bay, which was moved to the Electric Utilities and Infrastructure (EU&I) segment. Duke Energy is actively marketing the business as two separate disposal groups, the utility-scale solar and wind group and the distributed generation group (collectively, Commercial Renewables Disposal Groups). The sales processes for both Disposal Groups are ongoing and Duke Energy expects to dispose of these groups in the second half of 2023. Assets Held For Sale and Discontinued Operations The Commercial Renewables Disposal Groups were classified as held for sale and as discontinued operations in the fourth quarter of 2022. No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows or the Consolidated Statements of Changes in Equity. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Consolidated Balance Sheets. December 31, (in millions) 2022 2021 Current Assets Held for Sale Cash and cash equivalents $ 10 $ 3 Receivables, net 107 87 Inventory 88 86 Other 57 56 Total current assets held for sale 262 232 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 6,444 7,323 Accumulated depreciation and amortization (1,651) (1,452) Net property, plant and equipment 4,793 5,871 Operating lease right-of-use assets, net 140 130 Investments in equity method unconsolidated affiliates 522 513 Other 179 181 Total other noncurrent assets held for sale 841 824 Total Assets Held for Sale $ 5,896 $ 6,927 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 122 $ 98 Taxes accrued 17 18 Other 120 51 Total current liabilities associated with assets held for sale 259 167 Noncurrent Liabilities Associated with Assets Held for Sale Operating lease liabilities 150 134 Asset retirement obligations 190 175 Other 399 303 Total other noncurrent liabilities associated with assets held for sale 739 612 Total Liabilities Associated with Assets Held for Sale $ 998 $ 779 As of December 31, 2022, the noncontrolling interest balance is $1.6 billion. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations. Years Ended December 31, (in millions) 2022 2021 2020 Operating revenues $ 465 $ 476 $ 502 Operation, maintenance and other 337 343 292 Depreciation and amortization (a) 201 227 200 Property and other taxes 36 34 26 Other income and expenses, net 2 (27) 1 Interest expense 10 72 66 Loss on disposal 1,748 — — Loss before income taxes (1,865) (227) (81) Income tax benefit (516) (76) (67) Loss from discontinued operations $ (1,349) $ (151) $ (14) Add: Net loss attributable to noncontrolling interest included in discontinued operations 108 344 296 Net income from discontinued operations attributable to Duke Energy Corporation $ (1,241) $ 193 $ 282 (a) Upon meeting the criteria for assets held for sale, beginning in November 2022 depreciation and amortization expense were ceased. The Commercial Renewables Disposal Groups' held for sale assets included pretax impairments of approximately $1.7 billion for the year ended December 31, 2022. The impairment was recorded to write-down the carrying amount of the property, plant and equipment assets to the estimated fair value of the business, based on the expected selling price less estimated cost to sell. These losses were included in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations and Comprehensive Income. The fair value was primarily determined from the income approach using discounted cash flows but also considered market information obtained through the bidding process. The discounted cash flow model utilized Level 2 and Level 3 inputs. The fair value hierarchy levels are further discussed in Note 17. The impairment will be updated, if necessary, based on the final sales price, after any adjustments at closing for working capital and capital expenditures. Duke Energy has elected not to separately disclose discontinued operations on Duke Energy's Consolidated Statements of Cash Flows. The following table summarizes Duke Energy's cash flows from discontinued operations related to the Commercial Renewables Disposal Groups. Years Ended December 31, (in millions) 2022 2021 2020 Cash flows provided by (used in): Operating activities $ 213 $ 62 $ 466 Investing activities (802) (542) (1,102) Other Sale Related Matters Several Duke Energy renewables project companies, located in the Electric Reliability Council of Texas (ERCOT) market, were named in several lawsuits arising out of Texas Storm Uri, which occurred in February 2021. The legal actions related to these lawsuits will remain with Duke Energy and any future activity related to the matters will be presented in discontinued operations. See Note 5 for more information. The Commercial Renewables Disposal Groups' debt and related interest rate swaps have not been classified as held for sale as they are not currently expected transfer to the buyer, but would be required to be extinguished as a result of the disposition. As of December 31, 2022, the balance of long-term debt including current maturities is $1.5 billion. If the debt and related interest rate swaps do not transfer to the buyer and are terminated early, the expected total loss on extinguishment is approximately $100 million, of which approximately $55 million is expected to be attributable to Duke Energy. The loss would be recorded in discontinued operations when the debt and swaps are terminated. Hedge accounting was discontinued on the related interest rate swaps when the Commercial Renewables Disposal Groups were classified as held for sale as the forecasted transactions being hedged are no longer probable. As a result, a gain of $72 million was recorded in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations as of December 31, 2022, of which $54 million is attributable to Duke Energy. Interest expense and debt issuance costs directly associated with the Commercial Renewables Disposal Groups was allocated to discontinued operations. No interest from corporate level debt was allocated to discontinued operations. The Commercial Renewables Disposal Groups have entered into negotiations to modify or terminate certain PPAs under which the Commercial Renewables Disposal Groups sell power and RECs from renewable projects to offtakers. Duke Energy expects to pay offtakers approximately $95 million to modify the agreements. Charges related to the modifications will be reflected within Loss From Discontinued Operations in Duke Energy's Consolidated Statements of Operations. Sale of Minority Interest in Duke Energy Indiana Holdco, LLC

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS Reportable segments are determined based on information used by the chief operating decision-maker in deciding how to allocate resources and evaluate the performance of the business. Duke Energy evaluates segment performance based on segment income. Segment income is defined as income from continuing operations net of income attributable to noncontrolling interests and preferred stock dividends. Segment income, as discussed below, includes intercompany revenues and expenses that are eliminated on the Consolidated Financial Statements. Certain governance costs are allocated to each segment. In addition, direct interest expense and income taxes are included in segment income. Products and services are sold between affiliate companies and reportable segments of Duke Energy at cost. Segment assets as presented in the tables that follow exclude all intercompany assets. Duke Energy Due to Duke Energy's commitment in the fourth quarter of 2022 to sell the Commercial Renewables business segment, Duke Energy's segment structure now includes the following two segments: EU&I and GU&I. Prior period information has been recast to conform to the current segment structure. See Note 2 for further information on the Commercial Renewables Disposal Groups. The EU&I segment includes Duke Energy's regulated electric utilities in the Carolinas, Florida and the Midwest. The regulated electric utilities conduct operations through the Subsidiary Registrants that are substantially all regulated and, accordingly, qualify for regulatory accounting treatment. EU&I also includes Duke Energy's electric transmission infrastructure investments and the offshore wind contract for Carolina Long Bay. Refer to Note 2 for further information. The GU&I segment includes Piedmont, Duke Energy's natural gas local distribution companies in Ohio and Kentucky, and Duke Energy's natural gas storage, midstream pipeline, and renewable natural gas investments. GU&I's operations are substantially all regulated and, accordingly, qualify for regulatory accounting treatment. The remainder of Duke Energy’s operations is presented as Other, which is primarily comprised of interest expense on holding company debt, unallocated corporate costs and Duke Energy’s wholly owned captive insurance company, Bison. Other also includes Duke Energy's interest in NMC. See Note 13 for additional information on the investment in NMC. Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Year Ended December 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated Revenues $ 25,990 $ 2,748 $ 28,738 $ 30 $ — $ 28,768 Intersegment Revenues 34 92 126 92 (218) — Total Revenues $ 26,024 $ 2,840 $ 28,864 $ 122 $ (218) $ 28,768 Interest Expense $ 1,565 $ 182 $ 1,747 $ 778 $ (86) $ 2,439 Depreciation and amortization 4,550 327 4,877 236 (27) 5,086 Equity in earnings of unconsolidated affiliates 7 20 27 86 — 113 Income tax expense (benefit) 536 8 544 (244) — 300 Segment income (loss) (a)(b) 3,929 468 4,397 (737) (1) 3,659 Less noncontrolling interest 95 Add back preferred stock dividend 106 Discontinued operations (1,215) Net income $ 2,455 Capital investments expenditures and acquisitions (c) $ 8,985 $ 1,295 $ 10,280 $ 1,139 $ — $ 11,419 Segment assets (d) 152,104 16,411 168,515 9,571 — 178,086 (a) EU&I includes $386 million recorded within Impairment of assets and other charges, $46 million within Regulated electric revenues and $34 million within Noncontrolling Interests related to the Duke Energy Indiana court rulings on coal ash on the Consolidated Statements of Operations. See Note 4 for additional information. (b) Other includes $72 million recorded within Impairment of assets and other charges, $71 million within Operations, maintenance and other and a $7 million gain within Gains on sales of other assets related to costs attributable to business transformation, including long-term real estate strategy changes and workforce realignment on the Consolidated Statements of Operations; it also includes $25 million recorded within Operations, maintenance and other related to litigation on the Consolidated Statements of Operations. (c) Other includes capital investments expenditures and acquisitions related to the Commercial Renewables Disposal Groups. (d) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Year Ended December 31, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated Revenues $ 22,570 $ 2,022 $ 24,592 $ 29 $ — $ 24,621 Intersegment Revenues 33 90 123 84 (207) — Total Revenues $ 22,603 $ 2,112 $ 24,715 $ 113 $ (207) $ 24,621 Interest Expense $ 1,432 $ 142 $ 1,574 $ 643 $ (10) $ 2,207 Depreciation and amortization 4,251 303 4,554 236 (28) 4,762 Equity in earnings of unconsolidated affiliates 7 8 15 47 — 62 Income tax expense (benefit) 494 55 549 (281) — 268 Segment income (loss) (a)(b)(c) 3,850 396 4,246 (641) (3) 3,602 Less noncontrolling interest 329 Add back preferred stock dividend 106 Discontinued operations 200 Net income $ 3,579 Capital investments expenditures and acquisitions (d) $ 7,653 $ 1,271 $ 8,924 $ 828 $ — $ 9,752 Segment assets (e) 143,841 15,179 159,020 10,567 — 169,587 (a) EU&I includes $160 million of expense recorded within Impairment of assets and other charges, $77 million of income within Other Income and expenses, $5 million of expense within Operations, maintenance and other, $13 million of income within regulated operating revenues, $3 million of expense within interest expense and $6 million of expense within Depreciation and amortization on the Duke Energy Carolinas' Consolidated Statement of Operations related to the South Carolina Supreme Court decision on coal ash and insurance proceeds; it also includes $42 million of expense recorded within Impairment of assets and other charges, $34 million of income within Other Income and expenses, $7 million of expense within Operations, maintenance, and other, $15 million of income within Regulated electric operating revenues, $5 million of expense wit hin interest expense and $1 million of expense within Depreciation and amortization on the Duke Energy Progress' Consolidated Statement of Operations. See Notes 4 and 5 for more information. (b) GU&I includes $20 million, recorded within Equity in earnings (losses) of unconsolidated affiliates on the Consolidated Statements of Operations, related to natural gas pipeline investments. See Note 4 for additional information. (c) Other includes $133 million recorded within Impairment of assets and other charges, $42 million within Operations, maintenance and other, and $17 million within Depreciation and amortization on the Consolidated Statements of Operations, related to the workplace and workforce realignment. See Note 11 for additional information. (d) Other includes capital investments expenditures and acquisitions related to the Commercial Renewables Disposal Groups. (e) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Year Ended December 31, 2020 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated Revenues $ 21,687 $ 1,653 $ 23,340 $ 26 $ — $ 23,366 Intersegment Revenues 33 95 128 73 (201) — Total Revenues $ 21,720 $ 1,748 $ 23,468 $ 99 $ (201) $ 23,366 Interest Expense $ 1,320 $ 135 $ 1,455 $ 657 $ (15) $ 2,097 Depreciation and amortization 4,068 258 4,326 207 (29) 4,504 Equity in (losses) earnings of unconsolidated affiliates (1) (2,017) (2,018) 13 — (2,005) Income tax expense (benefit) 340 (349) (9) (160) — (169) Segment income (loss) (a)(b)(c) 2,669 (1,266) 1,403 (418) (4) 981 Less noncontrolling interest 295 Add back preferred stock dividend 107 Discontinued operations 289 Net income $ 1,082 Capital investments expenditures and acquisitions (d) $ 7,629 $ 1,309 $ 8,938 $ 1,483 $ — $ 10,421 Segment assets (e) 138,225 13,849 152,074 10,314 — 162,388 (a) EU&I includes $948 million of Impairment of assets and other charges and a reversal of $152 million included in Regulated electric operating revenue related to the CCR Settlement Agreement filed with the NCUC. Additionally, EU&I includes $19 million of Impairment of assets and other charges related to the Clemson University Combined Heat and Power Plant, $5 million of Impairment charges related to the natural gas pipeline assets and $16 million of shareholder contributions within Operations, maintenance and other related to Duke Energy Carolinas' and Duke Energy Progress' 2019 North Carolina rate cases. See Note 4 for additional information. (b) GU&I includes $2.1 billion recorded within Equity in (losses) earnings of unconsolidated affiliates and $7 million of Impairment of assets and other charges related to natural gas pipeline investments. See Notes 4 and 13 for additional information. (c) Other includes a $98 million reversal of 2018 severance costs due to a partial settlement in the Duke Energy Carolinas' 2019 North Carolina rate case. See Note 21 for additional information. (d) Other includes capital investments expenditures and acquisitions related to the Commercial Renewables Disposal Groups. (e) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Geographical Information Substantially all assets and revenues from continuing operations are within the U.S. Major Customers For the year ended December 31, 2022, revenues from one customer of Duke Energy Progress are $684 million. Duke Energy Progress has one reportable segment, Electric Utilities and Infrastructure. No other Subsidiary Registrant has an individual customer representing more than 10% of its revenues for the year ended December 31, 2022. Products and Services The following table summarizes revenues of the reportable segments by type. Retail Wholesale Retail Total (in millions) Electric Electric Natural Gas Other Revenues 2022 Electric Utilities and Infrastructure $ 22,036 $ 2,882 $ — $ 1,106 $ 26,024 Gas Utilities and Infrastructure — — 2,535 305 2,840 Total Reportable Segments $ 22,036 $ 2,882 $ 2,535 $ 1,411 $ 28,864 2021 Electric Utilities and Infrastructure $ 19,410 $ 2,216 $ — $ 977 $ 22,603 Gas Utilities and Infrastructure — — 2,025 87 2,112 Total Reportable Segments $ 19,410 $ 2,216 $ 2,025 $ 1,064 $ 24,715 2020 Electric Utilities and Infrastructure $ 18,898 $ 1,878 $ — $ 944 $ 21,720 Gas Utilities and Infrastructure — — 1,691 57 1,748 Total Reportable Segments $ 18,898 $ 1,878 $ 1,691 $ 1,001 $ 23,468 Duke Energy Ohio Duke Energy Ohio has two reportable segments, EU&I and GU&I. EU&I transmits and distributes electricity in portions of Ohio and generates, distributes and sells electricity in portions of Northern Kentucky. GU&I transports and sells natural gas in portions of Ohio and Northern Kentucky. Both reportable segments conduct operations primarily through Duke Energy Ohio and its wholly owned subsidiary, Duke Energy Kentucky. The remainder of Duke Energy Ohio's operations is presented as Other. All Duke Energy Ohio assets and revenues from continuing operations are within the U.S. Year Ended December 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 1,798 $ 716 $ 2,514 $ — $ — $ 2,514 Interest expense $ 86 $ 43 $ 129 $ — $ — $ 129 Depreciation and amortization 221 103 324 — — 324 Income tax expense (benefit) 24 (43) (19) (2) — (21) Segment income (loss)/Net income 189 121 310 (8) — 302 Capital expenditures $ 488 $ 362 $ 850 $ — $ — $ 850 Segment assets 7,504 4,164 11,668 14 (176) 11,506 Year Ended December 31, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 1,493 $ 544 $ 2,037 $ — $ — $ 2,037 Interest expense $ 87 $ 24 $ 111 $ — $ — $ 111 Depreciation and amortization 217 90 307 — — 307 Income tax expense (benefit) 15 19 34 (4) — 30 Segment income (loss)/Net Income 141 78 219 (15) — 204 Capital expenditures $ 486 $ 362 $ 848 $ — $ — $ 848 Segment assets 6,882 3,892 10,774 29 (29) 10,774 Year Ended December 31, 2020 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 1,405 $ 453 $ 1,858 $ — $ — $ 1,858 Interest expense $ 85 $ 17 $ 102 $ — $ — $ 102 Depreciation and amortization 200 78 278 — — 278 Income tax expense (benefit) 19 26 45 (2) — 43 Segment income (loss) 162 96 258 (6) — 252 Capital expenditures $ 548 $ 286 $ 834 $ — $ — $ 834 Segment assets 6,615 3,380 9,995 32 (2) 10,025

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2022
Regulated Operations [Abstract]
Regulatory Matters	REGULATORY MATTERS REGULATORY ASSETS AND LIABILITIES The Duke Energy Registrants record regulatory assets and liabilities that result from the ratemaking process. See Note 1 for further information. The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant. Duke Energy Progress Energy December 31, December 31, (in millions) 2022 2021 2022 2021 Regulatory Assets AROs – coal ash $ 3,205 $ 3,408 $ 1,429 $ 1,399 AROs – nuclear and other 945 684 884 620 Deferred fuel and purchased power 3,866 1,253 2,060 718 Accrued pension and OPEB 2,336 2,017 759 725 Storm cost securitized balance, net 940 991 720 759 Nuclear asset securitized balance, net 881 937 881 937 Debt fair value adjustment 829 884 — — Storm cost deferrals 666 213 559 189 Hedge costs deferrals 378 348 128 137 Post-in-service carrying costs (PISCC) and deferred operating expenses 342 356 42 47 Retired generation facilities 316 357 243 265 Deferred asset – Lee and Harris COLA 288 317 21 21 Advanced metering infrastructure (AMI) 283 311 111 130 Customer connect project 271 242 136 124 Costs of removal regulatory asset 221 107 221 107 Vacation accrual 222 221 43 42 Incremental COVID-19 expenses 210 87 78 28 CEP deferral 190 161 — — Demand side management (DSM)/Energy efficiency (EE) 189 235 188 230 Derivatives – natural gas supply contracts 168 139 — — NCEMPA deferrals 157 165 157 165 Nuclear deferral 154 120 64 42 Deferred pipeline integrity costs 121 108 — — COR settlement 120 123 32 32 Deferred coal ash handling system costs 92 90 25 23 Qualifying facility contract buyouts 81 94 81 94 Amounts due from customers 57 85 — — Propane caverns 26 — — — Deferred severance charges 21 54 7 18 Manufactured gas plant (MGP) — 104 — — Other 555 426 110 87 Total regulatory assets 18,130 14,637 8,979 6,939 Less: current portion 3,485 2,150 1,833 1,030 Total noncurrent regulatory assets $ 14,645 $ 12,487 $ 7,146 $ 5,909 Regulatory Liabilities Net regulatory liability related to income taxes $ 6,462 $ 7,199 $ 2,192 $ 2,394 Costs of removal 5,151 6,150 2,269 2,955 AROs – nuclear and other 1,038 2,053 — — Hedge cost deferrals 683 364 252 155 Accrued pension and OPEB 211 213 — — DOE Settlement 154 — 154 — Provision for rate refunds 78 274 28 87 Amounts to be refunded to customers 45 — — — Other 1,226 1,110 434 453 Total regulatory liabilities 15,048 17,363 5,329 6,044 Less: current portion 1,466 1,211 576 478 Total noncurrent regulatory liabilities $ 13,582 $ 16,152 $ 4,753 $ 5,566 Descriptions of regulatory assets and liabilities summarized in the tables above and below follow. See tables below for recovery and amortization periods at the separate registrants. AROs – coal ash. Represents deferred depreciation and accretion related to the legal obligation to close ash basins. The costs are deferred until recovery treatment has been determined. See Notes 1 and 10 for additional information. AROs – nuclear and other. Represents regulatory assets or liabilities, including deferred depreciation and accretion, related to legal obligations associated with the future retirement of property, plant and equipment, excluding amounts related to coal ash. The AROs relate primarily to decommissioning nuclear power facilities. The amounts also include certain deferred gains and losses on NDTF investments. See Notes 1 and 10 for additional information. Deferred fuel and purchased power. Represents certain energy-related costs that are recoverable or refundable as approved by the applicable regulatory body. Accrued pension and OPEB. Accrued pension and OPEB represent regulatory assets and liabilities related to each of the Duke Energy Registrants’ respective shares of unrecognized actuarial gains and losses and unrecognized prior service cost and credit attributable to Duke Energy’s pension plans and OPEB plans. The regulatory asset or liability is amortized with the recognition of actuarial gains and losses and prior service cost and credit to net periodic benefit costs for pension and OPEB plans. The accrued pension and OPEB regulatory assets are expected to be recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. Storm cost securitized balance, net. Represents the North Carolina portion of storm restoration expenditures related to Hurricane Florence, Hurricane Michael, Hurricane Dorian and Winter Storm Diego (2018 and 2019 events). Nuclear asset securitized balance, net. Represents the balance associated with Crystal River Unit 3 retirement approved for recovery by the FPSC on September 15, 2015, and the upfront financing costs securitized in 2016 with issuance of the associated bonds. The regulatory asset balance is net of the AFUDC equity portion. Debt fair value adjustment. Purchase accounting adjustments recorded to state the carrying value of Progress Energy and Piedmont at fair value in connection with the 2012 and 2016 mergers, respectively. Amount is amortized over the life of the related debt. Storm cost deferrals. Represents deferred incremental costs incurred related to major weather-related events. Hedge costs deferrals. Amounts relate to unrealized gains and losses on derivatives recorded as a regulatory asset or liability, respectively, until the contracts are settled. Post-in-service carrying costs (PISCC) and deferred operating expenses. Represents deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service. Retired generation facilities. Represents amounts to be recovered for facilities that have been retired and are probable of recovery. Deferred asset – Lee and Harris COLA. Represents deferred costs incurred for the canceled Lee and Harris nuclear projects. AMI. Represents deferred costs related to the installation of AMI meters and remaining net book value of non-AMI meters to be replaced at Duke Energy Carolinas, net book value of existing meters at Duke Energy Florida , Duke Energy Progress and Duke Energy Ohio and future recovery of net book value of electromechanical meters that have been replaced with AMI meters at Duke Energy Indiana. Customer connect project. Represents incremental operating expenses and carrying costs on deferred amounts related to the deployment of the new customer information system. Vacation accrual. Represents vacation entitlement, which is generally recovered in the following year. Incremental COVID-19 expenses. Represents incremental costs related to ensuring continuity and quality of service in a safe manner during the COVID-19 pandemic. CEP deferral . Represents deferred depreciation, PISCC and deferred property tax for Duke Energy Ohio Gas capital assets for the Capital Expenditure Program (CEP). DSM/EE. Deferred costs related to various DSM and EE programs recoverable through various mechanisms. Derivatives – natural gas supply contracts . Represents costs for certain long-dated, fixed quantity forward natural gas supply contracts, which are recoverable through PGA clauses. NCEMPA deferrals. Represents retail allocated cost deferrals and returns associated with the additional ownership interest in assets acquired from NCEMPA in 2015. Nuclear deferral. Includes amounts related to levelizing nuclear plant outage costs, which allows for the recognition of nuclear outage expenses over the refueling cycle rather than when the outage occurs, resulting in the deferral of operations and maintenance costs associated with refueling. Deferred pipeline integrity costs. Represents pipeline integrity management costs in compliance with federal regulations. COR settlement. Represents approved COR settlements that are being amortized over the average remaining lives, at the time of approval, of the associated assets. Deferred coal ash handling system costs . Represents deferred depreciation and returns associated with capital assets related to converting the ash handling system from wet to dry. Qualifying facility contract buyouts. Represents termination payments for regulatory recovery through the capacity clause. Amounts due from customers. Relates primarily to margin decoupling and IMR recovery mechanisms. Costs of removal regulatory asset. Represents the excess of spend over funds received from customers to cover the future removal of property, plant and equipment from retired or abandoned sites as property is retired, net of certain deferred gains on NDTF investments. Propane Caverns. Represents amounts for costs related to propane inventory, the net book value of remaining assets and decommissioning costs at Duke Energy Ohio. MGP. Represents remediation costs incurred at former MGP sites and the deferral of costs to be incurred at Duke Energy Ohio's East End and West End sites. Net regulatory liability related to income taxes. Amounts for all registrants include regulatory liabilities related primarily to impacts from the Tax Act. See Note 24 for additional information. Amounts have no immediate impact on rate base as regulatory assets are offset by deferred tax liabilities. Costs of removal. Represents funds received from customers to cover the future removal of property, plant and equipment from retired or abandoned sites as property is retired. Also includes certain deferred gains on NDTF investments. DOE Settlement. Represents litigation settlement funds received resulting from the DOE’s failure to accept spent nuclear fuel and other radioactive waste from the Crystal River Unit 3 during 2014-2018 as required under the Nuclear Waste Policy Act. Provision for rate refunds. Represents estimated amounts due to customers based on recording interim rates subject to refund. RESTRICTIONS ON THE ABILITY OF CERTAIN SUBSIDIARIES TO MAKE DIVIDENDS, ADVANCES AND LOANS TO DUKE ENERGY As a condition to the approval of merger transactions, the NCUC, PSCSC, PUCO, KPSC and IURC imposed conditions on the ability of Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio, Duke Energy Kentucky, Duke Energy Indiana and Piedmont to transfer funds to Duke Energy through loans or advances, as well as restricted amounts available to pay dividends to Duke Energy. Certain subsidiaries may transfer funds to the Parent by obtaining approval of the respective state regulatory commissions. These conditions imposed restrictions on the ability of the public utility subsidiaries to pay cash dividends as discussed below. Duke Energy Progress and Duke Energy Florida also have restrictions imposed by their first mortgage bond indentures, which in certain circumstances, limit their ability to make cash dividends or distributions on common stock. Amounts restricted as a result of these provisions were not material at December 31, 2022. Additionally, certain other subsidiaries of Duke Energy have restrictions on their ability to dividend, loan or advance funds to Duke Energy due to specific legal or regulatory restrictions, including, but not limited to, minimum working capital and tangible net worth requirements. The restrictions discussed below were not a material amount of Duke Energy's and Progress Energy's net assets at December 31, 2022. Duke Energy Carolinas Duke Energy Carolinas must limit cumulative distributions subsequent to mergers to (i) the amount of retained earnings on the day prior to the closing of the mergers, plus (ii) any future earnings recorded. Duke Energy Progress Duke Energy Progress must limit cumulative distributions subsequent to the mergers between Duke Energy and Progress Energy and Duke Energy and Piedmont to (i) the amount of retained earnings on the day prior to the closing of the respective mergers, plus (ii) any future earnings recorded. Duke Energy Ohio Duke Energy Ohio will not declare and pay dividends out of capital or unearned surplus without the prior authorization of the PUCO. Duke Energy Ohio received FERC and PUCO approval to pay dividends from its equity accounts that are reflective of the amount that it would have in its retained earnings account had push-down accounting for the Cinergy merger not been applied to Duke Energy Ohio’s balance sheet. The conditions include a commitment from Duke Energy Ohio that equity, adjusted to remove the impacts of push-down accounting, will not fall below 30% of total capital. Duke Energy Kentucky is required to pay dividends solely out of retained earnings and to maintain a minimum of 35% equity in its capital structure. Duke Energy Indiana Duke Energy Indiana must limit cumulative distributions subsequent to the merger between Duke Energy and Cinergy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded. In addition, Duke Energy Indiana will not declare and pay dividends out of capital or unearned surplus without prior authorization of the IURC. Piedmont Piedmont must limit cumulative distributions subsequent to the acquisition of Piedmont by Duke Energy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded. RATE-RELATED INFORMATION The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects. Duke Energy Carolinas and Duke Energy Progress Hurricane Ian In late September and early October 2022, Hurricane Ian inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 950,000 customers were impacted. Total estimated operation and maintenance expenses incurred for restoration efforts for the year ended December 31, 2022, were approximately $100 million, with an additional $9 million in capital investments. Approximately $83 million of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2022 ($40 million and $43 million for Duke Energy Carolinas and Duke Energy Progress, respectively). Duke Energy Carolinas and Duke Energy Progress have regulatory tools to recover storm costs including deferral and securitization. These estimates could change as Duke Energy Carolinas and Duke Energy Progress receive additional information on actual costs. Car bon Plan Proceeding On October 13, 2021, North Carolina enacted legislation (Energy Solutions for North Carolina or HB 951) that established a framework overseen by the NCUC to advance North Carolina CO 2 emission reductions from electric generating facilities in the state through the use of least cost planning while providing for continued reliability and affordable rates for customers. Among other things, HB 951 directed that the NCUC approve an initial carbon plan (Carbon Plan) by December 31, 2022, taking all reasonable steps to achieve a 70% reduction in CO 2 emissions from public utilities’ electric generating facilities in the state by 2030 (from 2005 levels) and achieve carbon neutrality from electric generating facilities by 2050 while maintaining affordability and reliability for customers. On May 16, 2022, Duke Energy Carolinas and Duke Energy Progress filed their proposed Carolinas Carbon Plan (Proposed Plan) with the NCUC. The NCUC issued an order on December 30, 2022, adopting the first Carbon Plan. The order recognizes the value of an “all-of-the-above” approach to achieving CO 2 emission reductions and established a set of near-term procurement and development activities needed to continue progress towards the targeted CO 2 reductions, along with the schedule for the future biennial updates to the Carbon Plan. The approved near-term action plan includes procurement and development of solar, storage and hydrogen-capable natural gas generation at levels consistent with the Proposed Plan, along with upgrading key transmission facilities to strengthen the grid, improve resilience for customers and interconnect new solar generation and stakeholder engagement activities for onshore wind generation (in all cases, subject to any further applicable regulatory processes). The order also approved early development activities for long lead-time resources, including new nuclear, pumped-hydro storage and offshore wind transmission development. The NCUC affirmed the utility ownership structure required in HB 951; all new generation facilities or other resources selected by the NCUC to achieve the CO 2 emission reductions shall be owned and recovered on a cost-of-service basis by the utilities, with a carveout for 45% of solar and solar plus storage generation to be procured through long-term purchase power agreements with third parties. The order approves continued utilization of the remaining coal-fired generation assets, ensuring that appropriate replacement generating units and associated transmission infrastructure are in service before existing generating units are retired and providing an orderly transition out of coal generation by 2035. Storm Cost Securitization Legislation On June 15, 2022, the South Carolina General Assembly unanimously adopted S. 1077 (Act 227) in both the House and Senate and the bill was signed into law on June 17, 2022. The legislation enables the PSCSC to permit the issuance of bonds for the payment of storm costs and the creation of a storm charge for repayment. On August 5, 2022, Duke Energy Progress filed a petition with the PSCSC for review and approval of deferred storm costs to be securitized of approximately $223 million. The evidentiary hearing is scheduled to begin on or after March 1, 2023. On February 7, 2023, a stipulation was reached with all parties in the proceeding regarding certain items identified through the Office of Regulatory Staff (ORS) audit of storm costs. The final amount for securitization will depend on the outcome of the hearing. Duke Energy Progress cannot predict the outcome of this matter. Duke Energy Carolinas Regulatory Assets and Liabilities The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 1,391 $ 1,227 (g) (b) Deferred fuel and purchased power (i) 1,614 339 (e) 2024 Accrued pension and OPEB (c) 614 365 Yes (h) Storm cost securitized balance, net 220 232 2041 Storm cost deferrals 93 22 Yes (b) Hedge costs deferrals (c) 228 171 Yes (b) PISCC and deferred operating expenses (c) 30 31 Yes (b) Retired generation facilities (c) 39 54 Yes (b) Deferred asset – Lee COLA 267 296 (b) AMI 139 140 Yes (b) Customer connect project 62 66 Yes (b) Vacation accrual 84 83 2023 Incremental COVID-19 expenses 127 51 Yes (b) Nuclear deferral 90 78 2024 COR settlement 88 91 Yes (b) Deferred coal ash handling system costs 67 67 Yes (b) Other 235 166 (b) Total regulatory assets 5,388 3,479 Less: current portion 1,095 544 Total noncurrent regulatory assets $ 4,293 $ 2,935 Regulatory Liabilities (a) Net regulatory liability related to income taxes (d) $ 2,475 $ 2,785 (b) Costs of removal (c) 1,769 2,009 Yes (f) AROs – nuclear and other 1,038 2,053 (b) Hedge cost deferrals 350 209 (b) Accrued pension and OPEB (c) 44 44 Yes (h) Provision for rate refunds 50 124 Yes (b) Other 587 461 (b) Total regulatory liabilities 6,313 7,685 Less: current portion 530 487 Total noncurrent regulatory liabilities $ 5,783 $ 7,198 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 24. Portions are included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. (f) Recovered over the life of the associated assets. (g) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (i) Duke Energy Carolinas submitted a fuel filing to the NCUC in May 2022 for recovery of $327 million, which included deferrals through January 2022. This amount is expected to be recovered through August 2023. The next filing will be made in the first quarter of 2023. Duke Energy Carolinas submitted a fuel filing to the PSCSC in July 2022 for recovery of $79 million, which included deferrals through May 2022. The amount is expected to be recovered through September 2023. The next filing will be made in the third quarter of 2023. 2023 North Carolina Rate Case On January 19, 2023, Duke Energy Carolinas filed a PBR application with the NCUC to request an increase in base rate retail revenues. The PBR Application includes an MYRP to recover projected capital investments during the three year MYRP period. In addition to the MYRP, the PBR Application includes an Earnings Sharing Mechanism, Residential Decoupling Mechanism and Performance Incentive Mechanisms as required by HB 951. If approved, the overall retail revenue increase would be $501 million in Year 1, $172 million in Year 2 and $150 million in Year 3, for a combined total of $823 million or 15.7% by early 2026. The rate increase is driven primarily by major transmission and distribution investments since the last rate case and projected in the MYRP, as well as investments in energy storage and solar assets included in the MYRP consistent with the Carbon Plan. Duke Energy Carolinas plans to implement temporary rates, subject to refund, on September 1, 2023, and has requested permanent rates be effective by January 1, 2024. Duke Energy Carolinas cannot predict the outcome of this matter. Oconee Nuclear Station Subsequent License Renewal On June 7, 2021, Duke Energy Carolinas filed a subsequent license renewal (SLR) application for the Oconee Nuclear Station (ONS) with the U.S. Nuclear Regulatory Commission (NRC) to renew ONS’s operating license for an additional 20 years. The SLR would extend operations of the facility from 60 to 80 years. The current licenses for units 1 and 2 expire in 2033 and the license for unit 3 expires in 2034. By a Federal Register Notice dated July 28, 2021, the NRC provided a 60-day comment period for persons whose interest may be affected by the issuance of a subsequent renewed license for ONS to file a request for a hearing and a petition for leave to intervene. On September 27, 2021, Beyond Nuclear and Sierra Club (Petitioners) filed a Hearing Request and Petition to Intervene (Hearing Request) and a Petition for Waiver. The Hearing Request proposed three contentions and claimed that Duke Energy Carolinas did not satisfy the National Environmental Policy Act (NEPA) of 1969, as amended, or the NRC’s NEPA-implementing regulations. Following Duke Energy Carolinas' answer and the Petitioners' reply, on February 11, 2022, the Atomic Safety and Licensing Board (ASLB) issued its decision on the Hearing Request and found that the Petitioners failed to establish that the proposed contentions are litigable. The ASLB also denied the Petitioners' Petition for Waiver and terminated the proceeding. On February 24, 2022, the NRC issued a decision in the SLR appeal related to Florida Power and Light's Turkey Point nuclear generating station in Florida. The NRC ruled that the NRC’s license renewal Generic Environmental Impact Statement (GEIS) does not apply to SLR because the GEIS does not address SLR. The decision overturned a 2020 NRC decision that found the GEIS applies to SLR. Although Turkey Point is not owned or operated by a Duke Energy Registrant, the NRC’s order applies to all SLR applicants, including ONS. The NRC order also indicated no subsequent renewed licenses will be issued until the NRC staff has completed an adequate NEPA review for each application. On April 5, 2022, the NRC approved a 24-month rulemaking plan that will enable the NRC staff to complete an adequate NEPA review. Although an SLR applicant may wait until the rulemaking is completed, the NRC also noted that an applicant may submit a supplement to its environmental report providing information on environmental impacts during the SLR period prior to the rulemaking being completed. On November 7, 2022, Duke Energy Carolinas submitted a supplement to its environmental report addressing environmental impacts during the SLR period. On December 19, 2022, the NRC published a notice in the Federal Register that the NRC will conduct a limited scoping process to gather additional information necessary to prepare an environmental impact statement (EIS) to evaluate the environmental impacts at ONS during the SLR period. The NRC received comments from the EPA and the Petitioners and these comments identify eighteen potential impacts that should be considered by the NRC in the EIS, which include, but are not limited to, climate change and flooding, environmental justice, severe accidents, and external events. Currently, the NRC expects to publish a draft EIS in October 2023. On December 19, 2022, the NRC issued the Safety Evaluation Report (SER) for the safety portion of the SLR application. The NRC determined Duke Energy Carolinas met the requirements of the applicable regulations and identified actions that have been taken or will be taken to manage the effects of aging and address time-limited analyses. Duke Energy Carolinas and the NRC met with the Advisory Committee on Reactor Safeguards (ACR S) on February 2, 2023, to discuss issues regarding the SER and SLR application, after which the ACRS will issue a report discussing the result of its review. Although the NRC’s GEIS applicability decision will delay completion of the SLR proceeding, Duke Energy Carolinas does not believe it changes the probability that the ONS subsequent renewed licenses will ultimately be issued, although Duke Energy Carolinas cannot guarantee the outcome of the license application process. Duke Energy Carolinas and Duke Energy Progress intend to seek renewal of operating licenses and 20-year license extensions for all of their nuclear stations. New depreciation rates were implemented for all of the nuclear facilities during the second quarter of 2021. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of these additional relicensing proceedings. Duke Energy Progress Regulatory Assets and Liabilities The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 1,418 $ 1,389 (g) (b) AROs – nuclear and other 869 613 (c) Deferred fuel and purchased power (l) 705 303 (e) 2024 Accrued pension and OPEB (d) 417 351 Yes (j) Storm cost securitized balance, net 720 759 2041 Storm cost deferrals 234 170 Yes (b) Hedge costs deferrals 55 60 (b) PISCC and deferred operating expenses 42 47 Yes 2054 Retired generation facilities 149 171 Yes (b) Deferred asset - Harris COLA 21 21 (b) AMI 81 92 Yes (b) Customer connect project 54 57 Yes (b) Vacation accrual 43 42 2023 Incremental COVID-19 expenses 78 28 Yes (b) DSM/EE (d) 180 218 (h) (h) NCEMPA deferrals 157 165 (f) 2042 Nuclear deferral 64 42 2024 COR settlement 32 32 Yes (b) Deferred coal ash handling system costs 25 23 Yes (b) Other 70 68 (b) Total regulatory assets 5,414 4,651 Less: current portion 690 533 Total noncurrent regulatory assets $ 4,724 $ 4,118 Regulatory Liabilities (a) Net regulatory liability related to income taxes (k) $ 1,559 $ 1,695 (b) Costs of removal (d) 2,269 2,955 Yes (i) Hedge cost deferrals 252 155 (b) Provision for rate refunds 28 87 Yes (b) Other 344 357 (b) Total regulatory liabilities 4,452 5,249 Less: current portion 332 381 Total noncurrent regulatory liabilities $ 4,120 $ 4,868 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit. (d) Included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. (f) South Carolina retail allocated costs are earning a return. (g) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (i) Recovered over the life of the associated assets. (j) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (k) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 24. Portions are included in rate base. (l) Duke Energy Progress submitted a fuel filing to the NCUC in August 2022 for recovery of $251 million, which included deferrals through June 2022. This amount is expected to be recovered through November 2023. The next filing will be made in the second quarter of 2023. Duke Energy Progress submitted a fuel filing to the PSCSC in April 2022 for recovery of $44 million, which included deferrals through February 2022. This amount is expected to be recovered through June 2023. The next filing will be made in the second quarter of 2023. 2022 North Carolina Rate Case On October 6, 2022, Duke Energy Progress filed a PBR application with the NCUC to request an increase in base rate retail revenues. The rate request before the NCUC includes an MYRP to recover projected capital investments during the three Duke Energy Progress plans to implement temporary rates, subject to refund, on June 1, 2023, and has requested permanent rates be effective by October 1, 2023. The evidentiary hearing has been scheduled to begin on May 1, 2023. Duke Energy Progress cannot predict the outcome of this matter. 2022 South Carolina Rate Case On September 1, 2022, Duke Energy Progress filed an application with the PSCSC to request an increase in base rate retail revenues. On J anuary 12, 2023, Duke Energy Progress and the ORS, as well as other consumer, environmental, and industrial intervening parties, filed a comprehensive Agreement and Stipulation of Settlement resolving all issues in the base rate proceeding. The major components of the stipulation include: • A $52 million annual customer rate increase prior to the reduction from the accelerated return to customers of federal unprotected Property, Plant and Equipment related EDIT. After extending the remaining EDIT giveback to customers to 33 months, the net annual retail rate increase is approximately $36 million. • ROE of 9.6% based upon a capital structure of 52.43% equity and 47.57% debt. • Continuation of deferral treatment of coal ash basin closure costs. Supports an amortization period for remaining coal ash closure costs in this rate case of seven years. Duke Energy Progress agreed not to seek recovery of approximately $50 million of deferred coal ash expenditures related to retired sites in this rate case (South Carolina retail allocation). • Accepts the 2021 Depreciation Study as proposed in this case, as adjusted for certain recommendations from ORS and includes accelerated retirement dates for certain coal units as originally proposed. • Establishment of a storm reserve to help offset the costs of major storms. The PSCSC held a hearing on January 17, 2023, to consider evidence supporting the stipulation and unanimously voted to approve the comprehensive agreement on February 9, 2023. The PSCSC voted to

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES INSURANCE General Insurance The Duke Energy Registrants have insurance and reinsurance coverage either directly or through indemnification from Duke Energy’s captive insurance company, Bison, and its affiliates, consistent with companies engaged in similar commercial operations with similar type properties. The Duke Energy Registrants’ coverage includes (i) commercial general liability coverage for liabilities arising to third parties for bodily injury and property damage; (ii) workers’ compensation; (iii) automobile liability coverage; and (iv) property coverage for all real and personal property damage. Real and personal property damage coverage excludes electric transmission and distribution lines, but includes damages arising from boiler and machinery breakdowns, earthquakes, flood damage and extra expense, but not outage or replacement power coverage. All coverage is subject to certain deductibles or retentions, sublimits, exclusions, terms and conditions common for companies with similar types of operations. The Duke Energy Registrants self-insure their electric transmission and distribution lines against loss due to storm damage and other natural disasters. As discussed further in Note 4, Duke Energy Florida maintains a storm damage reserve and has a regulatory mechanism to recover the cost of named storms on an expedited basis. The cost of the Duke Energy Registrants’ coverage can fluctuate from year to year reflecting claims history and conditions of the insurance and reinsurance markets. In the event of a loss, terms and amounts of insurance and reinsurance available might not be adequate to cover claims and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered by other sources, could have a material effect on the Duke Energy Registrants’ results of operations, cash flows or financial position. Each company is responsible to the extent losses may be excluded or exceed limits of the coverage available. Nuclear Insurance Duke Energy Carolinas owns and operates McGuire and Oconee and operates and has a partial ownership interest in Catawba. McGuire and Catawba each have two reactors. Oconee has three reactors. The other joint owners of Catawba reimburse Duke Energy Carolinas for certain expenses associated with nuclear insurance per the Catawba joint owner agreements. Duke Energy Progress owns and operates Robinson, Brunswick and Harris. Robinson and Harris each have one reactor. Brunswick has two reactors. Duke Energy Florida owns Crystal River Unit 3, which permanently ceased operation in 2013 and achieved a SAFSTOR condition in July 2019. On October 1, 2020, Crystal River Unit 3 changed decommissioning strategies from SAFSTOR to DECON. In the event of a loss, terms and amounts of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered by other sources, could have a material effect on Duke Energy Carolinas’, Duke Energy Progress’ and Duke Energy Florida’s results of operations, cash flows or financial position. Each company is responsible to the extent losses may be excluded or exceed limits of the coverage available. Nuclear Liability Coverage The Price-Anderson Act requires owners of nuclear reactors to provide for public nuclear liability protection per nuclear incident up to a maximum total financial protection liability. The maximum total financial protection liability, which is approximately $13.7 billion, is subject to change every five years for inflation and for the number of licensed reactors. Total nuclear liability coverage consists of a combination of private primary nuclear liability insurance coverage and a mandatory industry risk-sharing program to provide for excess nuclear liability coverage above the maximum reasonably available private primary coverage. The U.S. Congress could impose revenue-raising measures on the nuclear industry to pay claims. Primary Liability Insurance Duke Energy Carolinas and Duke Energy Progress have purchased the maximum reasonably available private primary nuclear liability insurance as required by law, which is $450 million per station. Duke Energy Florida has purchased $100 million primary nuclear liability insurance for Crystal River in compliance with the law. Excess Liability Program This program provides $13.2 billion of coverage per incident through the Price-Anderson Act’s mandatory industrywide excess secondary financial protection program of risk pooling. This amount is the product of potential cumulative retrospective premium assessments of $138 million times the current 96 licensed commercial nuclear reactors in the U.S. Under this program, operating unit licensees could be assessed retrospective premiums to compensate for public nuclear liability damages in the event of a nuclear incident at any licensed facility in the U.S. Retrospective premiums may be assessed at a rate not to exceed $20.5 million per year per licensed reactor for each incident. The assessment may be subject to state premium taxes. Nuclear Property and Accidental Outage Coverage Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are members of Nuclear Electric Insurance Limited (NEIL), an industry mutual insurance company, which provides property damage, nuclear accident decontamination and premature decommissioning insurance for each station for losses resulting from damage to its nuclear plants, either due to accidents or acts of terrorism. Additionally, NEIL provides accidental outage coverage for losses in the event of a major accidental outage at an insured nuclear station. Pursuant to regulations of the NRC, each company’s property damage insurance policies provide that all proceeds from such insurance be applied, first, to place the plant in a safe and stable condition after a qualifying accident and second, to decontaminate the plant before any proceeds can be used for decommissioning, plant repair or restoration. Losses resulting from acts of terrorism are covered as common occurrences, such that if terrorist acts occur against one or more commercial nuclear power plants insured by NEIL within a 12-month period, they would be treated as one event and the owners of the plants where the act occurred would share one full limit of liability. The full limit of liability is currently $3.2 billion. NEIL sublimits the total aggregate for all of their policies for non-nuclear terrorist events to approximately $1.8 billion. Each nuclear facility has accident property damage, nuclear accident decontamination and premature decommissioning liability insurance from NEIL with limits of $1.5 billion, except for Crystal River Unit 3. Crystal River Unit 3’s limit is $50 million and is on an actual cash value basis. All nuclear facilities except for Catawba and Crystal River Unit 3 also share an additional $1.25 billion nuclear accident insurance limit above their dedicated underlying limit. This shared additional excess limit is not subject to reinstatement in the event of a loss. Catawba has a dedicated $1.25 billion of additional nuclear accident insurance limit above its dedicated underlying limit. Catawba and Oconee also have an additional $750 million of non-nuclear accident property damage limit. All coverages are subject to sublimits and significant deductibles. NEIL’s Accidental Outage policy provides some coverage, similar to business interruption, for losses in the event of a major accident property damage outage of a nuclear unit. Coverage is provided on a weekly limit basis after a significant waiting period deductible and at 100% of the applicable weekly limits for 52 weeks and 80% of the applicable weekly limits for up to the next 110 weeks. Coverage is provided until these applicable weekly periods are met, where the accidental outage policy limit will not exceed $490 million for Catawba, McGuire, Harris, Brunswick, Oconee and Robinson. NEIL sublimits the accidental outage recovery up to the first 104 weeks of coverage not to exceed $328 million from non-nuclear accidental property damage. Coverage amounts decrease in the event more than one unit at a station is out of service due to a common accident. All coverages are subject to sublimits and significant deductibles. Potential Retroactive Premium Assessments In the event of NEIL losses, NEIL’s board of directors may assess member companies' retroactive premiums of amounts up to 10 times their annual premiums for up to six years after a loss. NEIL has never exercised this assessment. The maximum aggregate annual retrospective premium obligations for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are $151 million, $93 million and $1 million, respectively. Duke Energy Carolinas' maximum assessment amount includes 100% of potential obligations to NEIL for jointly owned reactors. Duke Energy Carolinas would seek reimbursement from the joint owners for their portion of these assessment amounts. ENVIRONMENTAL The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal, coal ash and other environmental matters. These regulations can be changed from time to time, imposing new obligations on the Duke Energy Registrants. The following environmental matters impact all of the Duke Energy Registrants. Remediation Activities In addition to AROs recorded as a result of various environmental regulations, discussed in Note 10, the Duke Energy Registrants are responsible for environmental remediation at various sites. These include certain properties that are part of ongoing operations and sites formerly owned or used by Duke Energy entities. These sites are in various stages of investigation, remediation and monitoring. Managed in conjunction with relevant federal, state and local agencies, remediation activities vary based upon site conditions and location, remediation requirements, complexity and sharing of responsibility. If remediation activities involve joint and several liability provisions, strict liability, or cost recovery or contribution actions, the Duke Energy Registrants could potentially be held responsible for environmental impacts caused by other potentially responsible parties and may also benefit from insurance policies or contractual indemnities that cover some or all cleanup costs. Liabilities are recorded when losses become probable and are reasonably estimable. The total costs that may be incurred cannot be estimated because the extent of environmental impact, allocation among potentially responsible parties, remediation alternatives and/or regulatory decisions have not yet been determined at all sites. Additional costs associated with remediation activities are likely to be incurred in the future and could be significant. Costs are typically expensed as Operation, maintenance and other in the Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable. The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities (in millions) December 31, 2022 December 31, 2021 Reserves for Environmental Remediation Duke Energy $ 84 $ 88 Duke Energy Carolinas 22 19 Progress Energy 19 23 Duke Energy Progress 8 11 Duke Energy Florida 11 11 Duke Energy Ohio 33 34 Duke Energy Indiana 3 4 Piedmont 7 9 Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material. LITIGATION Duke Energy Michael Johnson et al. v. Duke Energy Corporation et al. On September 23, 2020, plaintiff Michael Johnson, a former Duke Energy employee and participant in the Duke Energy Retirement Savings Plan (Plan) brought suit on his own behalf and on behalf of other participants and beneficiaries similarly situated against Duke Energy Corporation, the Duke Energy Benefits Committee, and other unnamed individual defendants. The complaint, which was subsequently amended to add a current participant as a plaintiff on November 23, 2020, alleges that the defendants breached their fiduciary duties with respect to certain fees associated with the Plan in violation of the Employee Retirement Income Security Act of 1974 and seeks certification of a class of all individuals who were participants or beneficiaries of the Plan at any time on or after September 23, 2014. The defendants filed a motion to dismiss the plaintiffs’ amended complaint on December 18, 2020. On January 31, 2022, the court denied the defendants' motion to dismiss. On February 28, 2022, Duke Energy responded to the amended complaint. Discovery commenced and the parties exchanged preliminary disclosures. After review of these disclosures, the plaintiffs agreed to voluntarily dismiss the suit and the parties subsequently filed a joint stipulation of voluntary dismissal with prejudice on April 29, 2022, ending this litigation. Texas Storm Uri Tort Litigation Duke Energy Corporation 2 for more information related to the sale of the Commercial Renewables Disposal Groups. Duke Energy Carolinas Ruben Villano, et al. v. Duke Energy Carolinas, LLC On June 16, 2021, a group of nine individuals went over a low head dam adjacent to the Dan River Steam Station in Eden, North Carolina, while water tubing. Emergency personnel rescued four people and five others were confirmed deceased. On August 11, 2021, Duke Energy Carolinas was served with the complaint filed in Durham County Superior Court on behalf of four survivors, which was later amended to include all the decedents along with the survivors. The lawsuit alleges that Duke Energy Carolinas knew that the river was used for recreational purposes and that Duke Energy d id not adequately warn about the dam and that Duke Energy Carolinas created a dangerous and hidden hazard on the Dan River in building and maintaining the low head dam. Discovery has commenced and is scheduled to be completed on or before August 23, 2023. The parties are preparing for mediation, which is scheduled for March 22, 2023. Disposi tive motions are due to be filed by September 6, 2023, and the case is scheduled to be trial-ready by October 2, 2023. Duke Energy Carolinas cannot predict the outcome of this matter. NTE Carolinas II, LLC Litigation In November 2017, Duke Energy Carolinas entered into a standard FERC large generator interconnection agreement (LGIA) with NTE Carolinas II, LLC (NTE), a company that proposed to build a combined-cycle natural gas plant in Rockingham County, North Carolina. On September 6, 2019, Duke Energy Carolinas filed a lawsuit in Mecklenburg County Superior Court against NTE for breach of contract, alleging that NTE's failure to pay benchmark payments for Duke Energy Carolinas' transmission system upgrades required under the interconnection agreement constituted a termination of the interconnection agreement. Duke Energy Carolinas sought a monetary judgment against NTE because NTE failed to make multiple milestone payments. The lawsuit was moved to federal court in North Carolina. NTE filed a motion to dismiss Duke Energy Carolinas’ complaint and brought counterclaims alleging anti-competitive conduct and violations of state and federal statutes. Duke Energy Carolinas filed a motion to dismiss NTE's counterclaims. Both NTE's and Duke Energy Carolinas' motions to dismiss were subsequently denied by the court. On May 21, 2020, in response to an NTE petition challenging Duke Energy Carolinas' termination of the LGIA, FERC issued a ruling that 1) it has exclusive jurisdiction to determine whether a transmission provider may terminate a LGIA; 2) FERC approval is required to terminate a conforming LGIA if objected to by the interconnection customer; and 3) Duke Energy may not announce the termination of a conforming LGIA unless FERC has approved the termination. FERC's Office of Enforcement also initiated an investigation of Duke Energy Carolinas into matters pertaining to the LGIA. Duke Energy Carolinas is cooperating with the Office of Enforcement but cannot predict the outcome of this investigation. Following completion of discovery, Duke Energy Carolinas filed a motion for summary judgment seeking a ruling in its favor as to some of its affirmative claims against NTE and to all of NTE’s counterclaims. On June 24, 2022, the court issued an order partially granting Duke Energy Carolinas' motion by dismissing NTE's counterclaims that Duke Energy Carolinas engaged in anti-competitive behavior in violation of state and federal statutes. On October 12, 2022, the parties executed a settlement agreement with respect to the remaining breach of contract claims in the litigation and a Stipulation of Dismissal was filed with the court on October 13, 2022. On November 11, 2022, NTE filed its Notice of Appeal to the U.S. Court of Appeals for the Fourth Circuit as to the District Court's summary judgment ruling in Duke Energy Carolinas' favor on NTE's antitrust and unfair competition claims. Briefing on NTE's appeal will be completed on May 3, 2023. Duke Energy Carolinas cannot predict the outcome of this matter. Asbestos-related Injuries and Damages Claims Duke Energy Carolinas has experienced numerous claims for indemnification and medical cost reimbursement related to asbestos exposure. These claims relate to damages for bodily injuries alleged to have arisen from exposure to or use of asbestos in connection with construction and maintenance activities conducted on its electric generation plants prior to 1985. Duke Energy Carolinas has recognized asbestos-related reserves of $457 million and $501 million at December 31, 2022, and 2021, respectively. These reserves are classified in Other within Other Noncurrent Liabilities and Other within Current Liabilities on the Consolidated Balance Sheets. The change in the reserves is a result of a third-party study completed in 2021 as well as settlements made throughout the year. These reserves are based upon Duke Energy Carolinas' best estimate for current and future asbestos claims through 2042 and are recorded on an undiscounted basis. In light of the uncertainties inherent in a longer-term forecast, management does not believe they can reasonably estimate the indemnity and medical costs that might be incurred after 2042 related to such potential claims. It is possible Duke Energy Carolinas may incur asbestos liabilities in excess of the recorded reserves. Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. Receivables for insurance recoveries were $595 million and $644 million at December 31, 2022, and 2021, respectively. These amounts are classified in Other within Other Noncurrent Assets and Receivables within Current Assets on the Consolidated Balance Sheets. Any future payments up to the policy limit will be reimbursed by the third-party insurance carrier. Duke Energy Carolinas is not aware of any uncertainties regarding the legal sufficiency of insurance claims. Duke Energy Carolinas believes the insurance recovery asset is probable of recovery as the insurance carrier continues to have a strong financial strength rating. The reserve for credit losses for insurance receivables for the asbestos-related injuries and damages is $12 million for Duke Energy and Duke Energy Carolinas as of December 31, 2022, and December 31, 2021. The insurance receivable is evaluated based on the risk of default and the historical losses, current conditions and expected conditions around collectability. Management evaluates the risk of default annually based on payment history, credit rating and changes in the risk of default from credit agencies. Duke Energy Progress and Duke Energy Florida Spent Nuclear Fuel Matters On June 18, 2018, Duke Energy Progress and Duke Energy Florida sued the U.S. in the U.S. Court of Federal Claims for damages incurred for the period 2014 through 2018. The lawsuit claimed the DOE breached a contract in failing to accept spent nuclear fuel under the Nuclear Waste Policy Act of 1982 and asserted damages for the cost of on-site storage in the amount of $100 million and $200 million for Duke Energy Progress and Duke Energy Florida, respectively. On March 30, 2022, the DOE and Duke Energy Progress executed a settlement agreement, pursuant to which Duke Energy Progress would receive damages for costs incurred between 2014 and 2018 and would be able to submit future costs on a defined schedule. In April 2022, Duke Energy Progress received $87 million in proceeds that related to damages incurred in 2014 through 2018. On May 2, 2022, the DOE and Duke Energy Florida executed a settlement agreement, pursuant to which Duke Energy Florida would receive damages for costs incurred between 2014 and 2018 and would be able to submit costs incurred in 2019 and 2020 pursuant to an audit process. In June 2022, Duke Energy Florida received $180 million in proceeds that related to damages incurred in 2014 through 2018. Duke Energy Indiana Coal Ash Basin Closure Plan Appeal On January 27, 2020, Hoosier Environmental Council (HEC) filed a Petition for Administrative Review with the Indiana Office of Environmental Adjudication challenging the Indiana Department of Environmental Management’s (IDEM's) December 10, 2019 partial approval of Duke Energy Indiana’s ash pond closure plan at Duke Energy's Gallagher power station. After hearing oral arguments in early April 2021 on Duke Energy Indiana's and HEC's competing Motions for Summary Judgment, on May 4, 2021, the administrative court rejected all of HEC’s claims and issued a ruling in favor of Duke Energy Indiana. On June 3, 2021, HEC filed an appeal in Superior Court to seek judicial review of the order . Briefing on the appeal was completed on December 13, 2021. On January 11, 2022, Duke Energy Indiana received a compliance obligation letter from the EPA notifying the company that the two basins at issue in the litigation are subject to requirements of the CCR Rule. The letter does not provide a deadline for compliance. Duke Energy Indiana is proceeding with surface impoundment closure at its Indiana sites consistent with EPA’s guidance, the federal CCR rule, and Indiana law, as applicable. On April 21, 2022, HEC filed a motion requesting that the court hold a hearing within 45 days and also take judicial notice of the EPA's January 11, 2022 letter. On April 22, 2022, Duke Energy Indiana sent IDEM a letter withdrawing the closure plans for the Gallagher North Ash Pond and Primary Pond Ash Fill. After acknowledgment by IDEM of withdrawal of these closure plans, Duke Energy Indiana filed a Motion to Dismiss the litigation as moot on April 28, 2022, which IDEM supported, and the court granted the Motion to Dismiss on July 8, 2022. Coal Ash Insurance Coverage Litigation In June 2022, Duke Energy Indiana filed a civil action in Indiana Superior Court against various insurance companies seeking declaratory relief with respect to insurance coverage for coal combustion residuals-related expenses and liabilities covered by third-party liability insurance policies. The insurance policies cover the 1969-1972 and 1984-1985 periods and provide third-party liability insurance for claims and suits alleging property damage, bodily injury and personal injury (or a combination thereof). A trial date has not yet been set. Duke Energy Indiana cannot predict the outcome of this matter. Other Litigation and Legal Proceedings The Duke Energy Registrants are involved in other legal, tax and regulatory proceedings arising in the ordinary course of business, some of which involve significant amounts. The Duke Energy Registrants believe the final disposition of these proceedings will not have a material effect on their results of operations, cash flows or financial position for the years presented. Reserves are classified on the Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Other within Current Liabilities. OTHER COMMITMENTS AND CONTINGENCIES General As part of their normal business, the Duke Energy Registrants are party to various financial guarantees, performance guarantees and other contractual commitments to extend guarantees of credit and other assistance to various subsidiaries, investees and other third parties. These guarantees involve elements of performance and credit risk, which are not fully recognized on the Consolidated Balance Sheets and have uncapped maximum potential payments. However, the Duke Energy Registrants do not believe these guarantees will have a material effect on their results of operations, cash flows or financial position. See Note 8 for more information. Purchase Obligations Purchased Power Duke Energy Progress, Duke Energy Florida and Duke Energy Ohio have ongoing purchased power contracts, including renewable energy contracts, with other utilities, wholesale marketers, co-generators and qualified facilities. These purchased power contracts generally provide for capacity and energy payments. In addition, Duke Energy Progress and Duke Energy Florida have various contracts to secure transmission rights. The following table presents executory purchased power contracts with terms exceeding one year, excluding contracts classified as leases. Minimum Purchase Amount at December 31, 2022 Contract (in millions) Expiration 2023 2024 2025 2026 2027 Thereafter Total Duke Energy Progress (a) 2028-2032 $ 22 $ 21 $ 22 $ 18 $ 19 $ 27 $ 129 Duke Energy Florida (b) 2024-2025 300 267 91 — — — 658 Duke Energy Ohio (c) 2024 55 36 — — — — 91 (a) Contracts represent between 18% and 100% of net plant output. (b) Contracts represent 100% of net plant output. (c) Share of net plant output varies. Excludes PPA with OVEC. Gas Supply and Capacity Contracts Duke Energy Ohio and Piedmont routinely enter into long-term natural gas supply commodity and capacity commitments and other agreements that commit future cash flows to acquire services needed in their businesses. These commitments include pipeline and storage capacity contracts and natural gas supply contracts to provide service to customers. Costs arising from the natural gas supply commodity and capacity commitments, while significant, are pass-through costs to customers and are generally fully recoverable through the fuel adjustment or PGA pro cedures and prudence reviews in North Carolina and South Carolina and under the Tennessee Incentive Plan in Tennessee. In the Midwest, these costs are recovered via the Gas Cost Recovery Rate in Ohio or the Gas Cost Adjustment Clause in Kentucky. The time periods for fixed payments under pipeline and storage capacity contracts are up to 20 years. The time periods for fixed payments under natural gas supply contracts are up to four years. The time period for the natural gas supply purchase commitments is up to nine years. Certai n storage and pipeline capacity contracts require the payment of demand charges that are based on rates approved by the FERC in order to maintain rights to access the natural gas storage or pipeline capacity on a firm basis during the contract term. The demand charges that are incurred in each period are recognized in the Consolidated Statements of Operations and Comprehensive Income as part of natural gas purchases and are included in Cost of natural gas. The following table presents future unconditional purchase obligations under natural gas supply and capacity contracts as of December 31, 2022. (in millions) 2023 2024 2025 2026 2027 Thereafter Total Duke Energy Ohio $ 85 $ 101 $ 85 $ 56 $ 52 $ 616 $ 995 Piedmont 319 313 267 213 203 587 1,902

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Leases	LEASES As part of its operations, Duke Energy leases certain aircraft, space on communication towers, industrial equipment, fleet vehicles, fuel transportation (barges and railcars), land and office space under various terms and expiration dates. Additionally, Duke Energy Carolinas, Duke Energy Progress and Duke Energy Indiana have finance leases related to firm natural gas pipeline transportation capacity. Duke Energy Progress and Duke Energy Florida have entered into certain PPAs, which are classified as finance and operating leases. Duke Energy has certain lease agreements, which include variable lease payments that are based on the usage of an asset. These variable lease payments are not included in the measurement of the ROU assets or operating lease liabilities on the Consolidated Financial Statements. Certain Duke Energy lease agreements include options for renewal and early termination. The intent to renew a lease varies depending on the lease type and asset. Renewal options that are reasonably certain to be exercised are included in the lease measurements. The decision to terminate a lease early is dependent on various economic factors. No termination options have been included in any of the lease measurements. Duke Energy Carolinas entered into a sale-leaseback arrangement in December 2019, to construct and occupy an office tower. The lease agreement was evaluated as a sale-leaseback of real estate and it was determined that the transaction did not qualify for sale-leaseback accounting. As a result, the transaction is being accounted for as a financing. For this transaction, Duke Energy Carolinas will continue to record the real estate on the Consolidated Balance Sheets within Property, Plant and Equipment as if it were the legal owner and will continue to recognize depreciation expense over the estimated useful life. In addition, the failed sale-leaseback obligation is reported within Long-Term Debt on the Consolidated Balance Sheets, with the monthly lease payments commencing after the construction phase being split between interest expense and principal pay down of the debt. Piedmont has certain agreements with Duke Energy Carolinas for the construction and transportation of natural gas pipelines to supply its natural gas plant needs. Piedmont accounts for these pipeline lateral contracts as sales-type leases since the present value of the sum of the lease payments equals the fair value of the assets. These pipeline lateral assets owned by Piedmont had a current net investment basis of $2 million as of December 31, 2022, and 2021, and a long-term net investment basis of $201 million and $203 million as of December 31, 2022, and 2021, respectively. These assets are classified in Other, within Current Assets and Other Noncurrent Assets, respectively, on Piedmont's Consolidated Balance Sheets. Duke Energy Carolinas accounts for the contracts as finance leases. The activity for these contracts is eliminated in consolidation at Duke Energy. The following tables present the components of lease expense. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Operating lease expense (a) $ 229 $ 39 $ 153 $ 83 $ 70 $ 10 $ 19 $ 6 Short-term lease expense (a) 4 — 1 — 1 — 2 — Variable lease expense (a) 61 (1) 60 37 23 — — 1 Finance lease expense Amortization of leased assets (b) 151 6 61 41 20 — — — Interest on lease liabilities (c) 50 32 49 45 4 — 1 — Total finance lease expense 201 38 110 86 24 — 1 — Total lease expense $ 495 $ 76 $ 324 $ 206 $ 118 $ 10 $ 22 $ 7 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Operating lease expense (a) $ 245 $ 43 $ 155 $ 83 $ 72 $ 11 $ 18 $ 7 Short-term lease expense (a) 5 — 2 1 1 — 2 — Variable lease expense (a) 41 17 22 10 12 — — 1 Finance lease expense Amortization of leased assets (b) 219 5 37 18 19 — 1 — Interest on lease liabilities (c) 55 33 48 42 6 — — — Total finance lease expense 274 38 85 60 25 — 1 — Total lease expense $ 565 $ 98 $ 264 $ 154 $ 110 $ 11 $ 21 $ 8 (a) Included in Operations, maintenance and other or, for barges and railcars, Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. (b) Included in Depreciation and amortization on the Consolidated Statements of Operations. (c) Included in Interest Expense on the Consolidated Statements of Operations. The following table presents operating lease maturities and a reconciliation of the undiscounted cash flows to operating lease liabilities. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont 2023 $ 225 $ 23 $ 118 $ 64 $ 54 $ 2 $ 6 $ 4 2024 207 21 110 56 54 2 5 4 2025 175 14 96 42 54 2 5 4 2026 161 13 99 45 54 2 4 — 2027 134 9 73 46 27 2 4 — Thereafter 322 37 253 209 44 15 45 1 Total operating lease payments 1,224 117 749 462 287 25 69 13 Less: present value discount (169) (20) (107) (76) (31) (7) (18) — Total operating lease liabilities (a) $ 1,055 $ 97 $ 642 $ 386 $ 256 $ 18 $ 51 $ 13 (a) Certain operating lease payments include renewal options that are reasonably certain to be exercised. The following table presents finance lease maturities and a reconciliation of the undiscounted cash flows to finance lease liabilities. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana 2023 $ 198 $ 38 $ 103 $ 78 $ 25 $ 1 2024 143 38 88 79 9 1 2025 76 38 85 80 5 1 2026 77 38 86 81 5 1 2027 74 38 82 81 1 1 Thereafter 584 427 555 555 — 23 Total finance lease payments 1,152 617 999 954 45 28 Less: amounts representing interest (388) (333) (371) (367) (4) (19) Total finance lease liabilities $ 764 $ 284 $ 628 $ 587 $ 41 $ 9 The following tables contain additional information related to leases. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Classification Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Assets Operating Operating lease ROU assets, net $ 1,042 $ 78 $ 628 $ 370 $ 258 $ 18 $ 49 $ 4 Finance Net property, plant and equipment 810 284 674 590 84 — 6 — Total lease assets $ 1,852 $ 362 $ 1,302 $ 960 $ 342 $ 18 $ 55 $ 4 Liabilities Current Operating Other current liabilities $ 179 $ 14 $ 96 $ 51 $ 45 $ 1 $ 4 $ — Finance Current maturities of long-term debt 153 7 57 35 22 — — — Noncurrent Operating Operating lease liabilities 876 83 546 335 211 17 47 13 Finance Long-Term Debt 611 277 571 552 19 — 9 — Total lease liabilities $ 1,819 $ 381 $ 1,270 $ 973 $ 297 $ 18 $ 60 $ 13 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Classification Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Assets Operating Operating lease ROU assets, net $ 1,136 $ 92 $ 691 $ 389 $ 302 $ 19 $ 53 $ 16 Finance Net property, plant and equipment 950 302 729 627 102 — 7 — Total lease assets $ 2,086 $ 394 $ 1,420 $ 1,016 $ 404 $ 19 $ 60 $ 16 Liabilities Current Operating Other current liabilities $ 184 $ 22 $ 94 $ 50 $ 44 $ 1 $ 4 $ 5 Finance Current maturities of long-term debt 151 6 61 41 20 — — — Noncurrent Operating Operating lease liabilities 940 78 606 350 256 18 50 14 Finance Long-Term Debt 764 283 629 588 41 — 10 — Total lease liabilities $ 2,039 $ 389 $ 1,390 $ 1,029 $ 361 $ 19 $ 64 $ 19 Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Cash paid for amounts included in the measurement of lease liabilities (a) Operating cash flows from operating leases $ 230 $ 24 $ 118 $ 63 $ 55 $ 2 $ 6 $ 4 Operating cash flows from finance leases 50 32 49 45 4 — 1 — Financing cash flows from finance leases 151 6 61 41 20 — — — Lease assets obtained in exchange for new lease liabilities (non-cash) Operating (b) $ 111 $ 10 $ — $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Cash paid for amounts included in the measurement of lease liabilities (a) Operating cash flows from operating leases $ 245 $ 25 $ 117 $ 62 $ 55 $ 2 $ 6 $ 5 Operating cash flows from finance leases 55 33 48 42 6 — — — Financing cash flows from finance leases 219 5 37 18 19 — 1 — Lease assets obtained in exchange for new lease liabilities (non-cash) Operating (b) $ 182 $ 4 $ 99 $ 99 $ — $ — $ — $ — Finance 322 — 322 322 — — — — (a) No amounts were classified as investing cash flows from operating leases. (b) Does not include ROU assets recorded as a result of the adoption of the new lease standard. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Weighted average remaining lease term (years) Operating leases 8 10 8 9 6 15 15 1 Finance leases 10 17 12 12 12 — 23 — Weighted average discount rate (a) Operating leases 3.4 % 3.8 % 3.6 % 3.5 % 3.8 % 4.2 % 4.0 % 3.3 % Finance leases 7.7 % 11.5 % 9.1 % 9.1 % 8.0 % — % 11.9 % — % December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Weighted average remaining lease term (years) Operating leases 8 9 8 10 7 16 16 4 Finance leases 10 18 13 13 11 — 24 — Weighted average discount rate (a) Operating leases 3.5 % 3.5 % 3.6 % 3.4 % 3.8 % 4.2 % 4.1 % 3.6 % Finance leases 7.3 % 11.6 % 9.0 % 9.0 % 8.2 % — % 11.9 % — % (a) The discount rate is calculated using the rate implicit in a lease if it is readily determinable. Generally, the rate used by the lessor is not provided to Duke Energy and in these cases the incremental borrowing rate is used. Duke Energy will typically use its fully collateralized incremental borrowing rate as of the commencement date to calculate and record the lease. The incremental borrowing rate is influenced by the lessee’s credit rating and lease term and as such may differ for individual leases, embedded leases or portfolios of leased assets.
Leases	LEASES As part of its operations, Duke Energy leases certain aircraft, space on communication towers, industrial equipment, fleet vehicles, fuel transportation (barges and railcars), land and office space under various terms and expiration dates. Additionally, Duke Energy Carolinas, Duke Energy Progress and Duke Energy Indiana have finance leases related to firm natural gas pipeline transportation capacity. Duke Energy Progress and Duke Energy Florida have entered into certain PPAs, which are classified as finance and operating leases. Duke Energy has certain lease agreements, which include variable lease payments that are based on the usage of an asset. These variable lease payments are not included in the measurement of the ROU assets or operating lease liabilities on the Consolidated Financial Statements. Certain Duke Energy lease agreements include options for renewal and early termination. The intent to renew a lease varies depending on the lease type and asset. Renewal options that are reasonably certain to be exercised are included in the lease measurements. The decision to terminate a lease early is dependent on various economic factors. No termination options have been included in any of the lease measurements. Duke Energy Carolinas entered into a sale-leaseback arrangement in December 2019, to construct and occupy an office tower. The lease agreement was evaluated as a sale-leaseback of real estate and it was determined that the transaction did not qualify for sale-leaseback accounting. As a result, the transaction is being accounted for as a financing. For this transaction, Duke Energy Carolinas will continue to record the real estate on the Consolidated Balance Sheets within Property, Plant and Equipment as if it were the legal owner and will continue to recognize depreciation expense over the estimated useful life. In addition, the failed sale-leaseback obligation is reported within Long-Term Debt on the Consolidated Balance Sheets, with the monthly lease payments commencing after the construction phase being split between interest expense and principal pay down of the debt. Piedmont has certain agreements with Duke Energy Carolinas for the construction and transportation of natural gas pipelines to supply its natural gas plant needs. Piedmont accounts for these pipeline lateral contracts as sales-type leases since the present value of the sum of the lease payments equals the fair value of the assets. These pipeline lateral assets owned by Piedmont had a current net investment basis of $2 million as of December 31, 2022, and 2021, and a long-term net investment basis of $201 million and $203 million as of December 31, 2022, and 2021, respectively. These assets are classified in Other, within Current Assets and Other Noncurrent Assets, respectively, on Piedmont's Consolidated Balance Sheets. Duke Energy Carolinas accounts for the contracts as finance leases. The activity for these contracts is eliminated in consolidation at Duke Energy. The following tables present the components of lease expense. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Operating lease expense (a) $ 229 $ 39 $ 153 $ 83 $ 70 $ 10 $ 19 $ 6 Short-term lease expense (a) 4 — 1 — 1 — 2 — Variable lease expense (a) 61 (1) 60 37 23 — — 1 Finance lease expense Amortization of leased assets (b) 151 6 61 41 20 — — — Interest on lease liabilities (c) 50 32 49 45 4 — 1 — Total finance lease expense 201 38 110 86 24 — 1 — Total lease expense $ 495 $ 76 $ 324 $ 206 $ 118 $ 10 $ 22 $ 7 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Operating lease expense (a) $ 245 $ 43 $ 155 $ 83 $ 72 $ 11 $ 18 $ 7 Short-term lease expense (a) 5 — 2 1 1 — 2 — Variable lease expense (a) 41 17 22 10 12 — — 1 Finance lease expense Amortization of leased assets (b) 219 5 37 18 19 — 1 — Interest on lease liabilities (c) 55 33 48 42 6 — — — Total finance lease expense 274 38 85 60 25 — 1 — Total lease expense $ 565 $ 98 $ 264 $ 154 $ 110 $ 11 $ 21 $ 8 (a) Included in Operations, maintenance and other or, for barges and railcars, Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. (b) Included in Depreciation and amortization on the Consolidated Statements of Operations. (c) Included in Interest Expense on the Consolidated Statements of Operations. The following table presents operating lease maturities and a reconciliation of the undiscounted cash flows to operating lease liabilities. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont 2023 $ 225 $ 23 $ 118 $ 64 $ 54 $ 2 $ 6 $ 4 2024 207 21 110 56 54 2 5 4 2025 175 14 96 42 54 2 5 4 2026 161 13 99 45 54 2 4 — 2027 134 9 73 46 27 2 4 — Thereafter 322 37 253 209 44 15 45 1 Total operating lease payments 1,224 117 749 462 287 25 69 13 Less: present value discount (169) (20) (107) (76) (31) (7) (18) — Total operating lease liabilities (a) $ 1,055 $ 97 $ 642 $ 386 $ 256 $ 18 $ 51 $ 13 (a) Certain operating lease payments include renewal options that are reasonably certain to be exercised. The following table presents finance lease maturities and a reconciliation of the undiscounted cash flows to finance lease liabilities. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana 2023 $ 198 $ 38 $ 103 $ 78 $ 25 $ 1 2024 143 38 88 79 9 1 2025 76 38 85 80 5 1 2026 77 38 86 81 5 1 2027 74 38 82 81 1 1 Thereafter 584 427 555 555 — 23 Total finance lease payments 1,152 617 999 954 45 28 Less: amounts representing interest (388) (333) (371) (367) (4) (19) Total finance lease liabilities $ 764 $ 284 $ 628 $ 587 $ 41 $ 9 The following tables contain additional information related to leases. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Classification Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Assets Operating Operating lease ROU assets, net $ 1,042 $ 78 $ 628 $ 370 $ 258 $ 18 $ 49 $ 4 Finance Net property, plant and equipment 810 284 674 590 84 — 6 — Total lease assets $ 1,852 $ 362 $ 1,302 $ 960 $ 342 $ 18 $ 55 $ 4 Liabilities Current Operating Other current liabilities $ 179 $ 14 $ 96 $ 51 $ 45 $ 1 $ 4 $ — Finance Current maturities of long-term debt 153 7 57 35 22 — — — Noncurrent Operating Operating lease liabilities 876 83 546 335 211 17 47 13 Finance Long-Term Debt 611 277 571 552 19 — 9 — Total lease liabilities $ 1,819 $ 381 $ 1,270 $ 973 $ 297 $ 18 $ 60 $ 13 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Classification Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Assets Operating Operating lease ROU assets, net $ 1,136 $ 92 $ 691 $ 389 $ 302 $ 19 $ 53 $ 16 Finance Net property, plant and equipment 950 302 729 627 102 — 7 — Total lease assets $ 2,086 $ 394 $ 1,420 $ 1,016 $ 404 $ 19 $ 60 $ 16 Liabilities Current Operating Other current liabilities $ 184 $ 22 $ 94 $ 50 $ 44 $ 1 $ 4 $ 5 Finance Current maturities of long-term debt 151 6 61 41 20 — — — Noncurrent Operating Operating lease liabilities 940 78 606 350 256 18 50 14 Finance Long-Term Debt 764 283 629 588 41 — 10 — Total lease liabilities $ 2,039 $ 389 $ 1,390 $ 1,029 $ 361 $ 19 $ 64 $ 19 Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Cash paid for amounts included in the measurement of lease liabilities (a) Operating cash flows from operating leases $ 230 $ 24 $ 118 $ 63 $ 55 $ 2 $ 6 $ 4 Operating cash flows from finance leases 50 32 49 45 4 — 1 — Financing cash flows from finance leases 151 6 61 41 20 — — — Lease assets obtained in exchange for new lease liabilities (non-cash) Operating (b) $ 111 $ 10 $ — $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Cash paid for amounts included in the measurement of lease liabilities (a) Operating cash flows from operating leases $ 245 $ 25 $ 117 $ 62 $ 55 $ 2 $ 6 $ 5 Operating cash flows from finance leases 55 33 48 42 6 — — — Financing cash flows from finance leases 219 5 37 18 19 — 1 — Lease assets obtained in exchange for new lease liabilities (non-cash) Operating (b) $ 182 $ 4 $ 99 $ 99 $ — $ — $ — $ — Finance 322 — 322 322 — — — — (a) No amounts were classified as investing cash flows from operating leases. (b) Does not include ROU assets recorded as a result of the adoption of the new lease standard. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Weighted average remaining lease term (years) Operating leases 8 10 8 9 6 15 15 1 Finance leases 10 17 12 12 12 — 23 — Weighted average discount rate (a) Operating leases 3.4 % 3.8 % 3.6 % 3.5 % 3.8 % 4.2 % 4.0 % 3.3 % Finance leases 7.7 % 11.5 % 9.1 % 9.1 % 8.0 % — % 11.9 % — % December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Weighted average remaining lease term (years) Operating leases 8 9 8 10 7 16 16 4 Finance leases 10 18 13 13 11 — 24 — Weighted average discount rate (a) Operating leases 3.5 % 3.5 % 3.6 % 3.4 % 3.8 % 4.2 % 4.1 % 3.6 % Finance leases 7.3 % 11.6 % 9.0 % 9.0 % 8.2 % — % 11.9 % — % (a) The discount rate is calculated using the rate implicit in a lease if it is readily determinable. Generally, the rate used by the lessor is not provided to Duke Energy and in these cases the incremental borrowing rate is used. Duke Energy will typically use its fully collateralized incremental borrowing rate as of the commencement date to calculate and record the lease. The incremental borrowing rate is influenced by the lessee’s credit rating and lease term and as such may differ for individual leases, embedded leases or portfolios of leased assets.

Debt and Credit Facilities

Debt and Credit Facilities	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Debt and Credit Facilities	DEBT AND CREDIT FACILITIES Summary of Debt and Related Terms The following tables summarize outstanding debt and includes debt attributable to the Commercial Renewables Disposal Groups. See Note 2 for further details. December 31, 2022 Weighted Average Duke Duke Duke Duke Duke Interest Duke Energy Progress Energy Energy Energy Energy (in millions) Rate Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unsecured debt, maturing 2023-2082 4.20 % $ 29,585 $ 1,150 $ 2,600 $ — $ 950 $ 1,330 $ 697 $ 3,390 Secured debt, maturing 2023-2052 4.11 % 5,632 1,317 2,383 1,155 1,228 — — — First mortgage bonds, maturing 2023-2052 (a) 3.89 % 32,645 11,306 16,350 8,776 7,576 1,850 3,138 — Finance leases, maturing 2023-2051 (b) 7.90 % 764 284 628 587 41 — 9 — Tax-exempt bonds, maturing 2027-2046 (c) 3.84 % 1,331 — 500 500 — 77 352 — Notes payable and commercial paper (d) 4.50 % 4,582 — — — — — — — Money pool/intercompany borrowings — 1,533 993 389 605 522 585 514 Fair value hedge carrying value adjustment (5) — — — — — — — Unamortized debt discount and premium, net (e) 1,016 (21) (40) (23) (16) (25) (17) (9) Unamortized debt issuance costs (f) (383) (70) (132) (59) (70) (12) (22) (18) Total debt 4.09 % $ 75,167 $ 15,499 $ 23,282 $ 11,325 $ 10,314 $ 3,742 $ 4,742 $ 3,877 Short-term notes payable and commercial paper (3,952) — — — — — — — Short-term money pool/intercompany borrowings — (1,233) (843) (238) (605) (497) (435) (514) Current maturities of long-term debt (g) (4,154) (1,018) (697) (369) (328) (475) (303) (45) Total long-term debt (g) $ 67,061 $ 13,248 $ 21,742 $ 10,718 $ 9,381 $ 2,770 $ 4,004 $ 3,318 (a) Substantially all electric utility property is mortgaged under mortgage bond indentures. (b) Duke Energy includes $164 million of finance lease purchase accounting adjustments related to Duke Energy Florida related to PPAs that are not accounted for as finance leases in their respective financial statements because of grandfathering provisions in GAAP. (c) Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility. (d) Includes $625 million classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper program was 15 days. (e) Duke Energy includes $1,057 million and $85 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively. (f) Duke Energy includes $27 million in purchase accounting adjustments primarily related to the merger with Progress Energy. (g) Refer to Note 18 for additional information on amounts from consolidated VIEs. December 31, 2021 Weighted Average Duke Duke Duke Duke Duke Interest Duke Energy Progress Energy Energy Energy Energy (in millions) Rate Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unsecured debt, maturing 2022-2082 3.71 % $ 24,564 $ 1,150 $ 2,250 $ — $ 150 $ 1,330 $ 700 $ 2,990 Secured debt, maturing 2022-2052 2.50 % 5,584 1,094 2,397 1,120 1,278 — — — First mortgage bonds, maturing 2022-2051 (a) 3.87 % 31,026 10,507 15,450 8,375 7,075 1,850 3,219 — Finance leases, maturing 2022-2051 (b) 5.81 % 915 289 690 629 61 — 10 — Tax-exempt bonds, maturing 2027-2041 (c) 0.65 % 360 — 48 48 — 27 285 — Notes payable and commercial paper (d) 0.35 % 3,929 — — — — — — — Money pool/intercompany borrowings — 526 2,959 322 199 128 150 518 Fair value hedge carrying value adjustment 4 4 — — — — — — Unamortized debt discount and premium, net (e) 1,119 (21) (34) (19) (14) (27) (18) (6) Unamortized debt issuance costs (f) (362) (67) (128) (54) (68) (13) (23) (16) Total debt 3.50 % $ 67,139 $ 13,482 $ 23,632 $ 10,421 $ 8,681 $ 3,295 $ 4,323 $ 3,486 Short-term notes payable and commercial paper (3,304) — — — — — — — Short-term money pool/intercompany borrowings — (226) (2,809) (172) (199) (103) — (518) Current maturities of long-term debt (g) (3,387) (362) (1,082) (556) (76) — (84) — Total long-term debt (g) $ 60,448 $ 12,894 $ 19,741 $ 9,693 $ 8,406 $ 3,192 $ 4,239 $ 2,968 (a) Substantially all electric utility property is mortgaged under mortgage bond indentures. (b) Duke Energy includes $256 million of finance lease purchase accounting adjustments related to Duke Energy Florida related to PPAs that are not accounted for as finance leases in their respective financial statements because of grandfathering provisions in GAAP. (c) Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility. (d) Includes $625 million that was classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper programs was 15 days. (e) Duke Energy includes $1,121 million and $100 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively. (f) Duke Energy includes $29 million in purchase accounting adjustments primarily related to the merger with Progress Energy. (g) Refer to Note 18 for additional information on amounts from consolidated VIEs. Current Maturities of Long-Term Debt The following table shows the significant components of Current maturities of Long-Term Debt on the Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings. (in millions) Maturity Date Interest Rate December 31, 2022 Unsecured Debt Duke Energy (Parent) April 2023 2.875 % $ 350 Duke Energy (Parent) (a) June 2023 3.469 % 500 Duke Energy (Parent) October 2023 3.950 % 400 Duke Energy Ohio (a) October 2023 4.272 % 150 Duke Energy Indiana (a) October 2023 4.118 % 300 First Mortgage Bonds Duke Energy Carolinas March 2023 2.500 % 500 Duke Energy Carolinas March 2023 3.050 % 500 Duke Energy Progress September 2023 3.375 % 300 Duke Energy Ohio September 2023 3.800 % 300 Other (b) 854 Current maturities of long-term debt $ 4,154 (a) Debt has a floating interest rate. (b) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities. Maturities and Call Options The following table shows the annual maturities of long-term debt for the next five years and thereafter. Amounts presented exclude short-term notes payable, commercial paper and money pool borrowings and debt issuance costs for the Subsidiary Registrants. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy (a) Carolinas Energy Progress Florida Ohio Indiana Piedmont 2023 $ 4,154 $ 1,018 $ 697 $ 369 $ 328 $ 475 $ 303 $ 45 2024 3,216 19 939 72 867 — 4 40 2025 4,322 491 1,040 975 65 245 4 205 2026 2,682 621 345 279 66 45 4 40 2027 3,203 323 947 233 714 102 177 300 Thereafter 52,999 11,884 18,642 9,238 7,753 2,415 3,853 2,760 Total long-term debt, including current maturities $ 70,576 $ 14,356 $ 22,610 $ 11,166 $ 9,793 $ 3,282 $ 4,345 $ 3,390 (a) Excludes $1,169 million in purchase accounting adjustments related to the Progress Energy merger and the Piedmont acquisition. The Duke Energy Registrants have the ability under certain debt facilities to call and repay the obligation prior to its scheduled maturity. Therefore, the actual timing of future cash repayments could be materially different than as presented above. Short-Term Obligations Classified as Long-Term Debt Tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder and certain commercial paper issuances and money pool borrowings are classified as Long-Term Debt on the Consolidated Balance Sheets. These tax-exempt bonds, commercial paper issuances and money pool borrowings, which are short-term obligations by nature, are classified as long-term due to Duke Energy’s intent and ability to utilize such borrowings as long-term financing. As Duke Energy’s Master Credit Facility and other bilateral letter of credit agreements have non-cancelable terms in excess of one year as of the balance sheet date, Duke Energy has the ability to refinance these short-term obligations on a long-term basis. The following tables show short-term obligations classified as long-term debt. December 31, 2022 and 2021 Duke Duke Duke Duke Duke Energy Energy Energy Energy (in millions) Energy Carolinas Progress Ohio Indiana Tax-exempt bonds $ 312 $ — $ — $ 27 $ 285 Commercial paper (a) 625 300 150 25 150 Total $ 937 $ 300 $ 150 $ 52 $ 435 (a) Progress Energy amounts are equal to Duke Energy Progress amounts. Summary of Significant Debt Issuances In January 2023, Duke Energy Carolinas issued $1.8 billion of first mortgage bonds. The issuance was split between a $900 million,10-year tranche at 4.95% and a $900 million, 30-year tranche at 5.35%. The net proceeds will be used to refinance $1 billion of Duke Energy Carolinas bonds maturing in March 2023, to pay down short-term debt and for general company purposes. The following tables summarize significant debt issuances (in millions). Year Ended December 31, 2022 Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Florida Piedmont Unsecured Debt May 2022 (a) May 2052 5.050 % $ 400 $ — $ — $ — $ — $ 400 June 2022 (b) June 2028 4.750 % 645 645 — — — — June 2022 (b) June 2034 5.306 % 537 537 — — — — August 2022 (c) March 2028 4.300 % 900 900 — — — — August 2022 (c) August 2032 4.500 % 1,150 1,150 — — — — August 2022 (c) August 2052 5.000 % 1,150 1,150 — — — December 2022 (d) December 2025 5.000 % 500 500 — — — — December 2022 (d) December 2027 5.000 % 500 500 — — — — First Mortgage Bonds March 2022 (e) March 2032 2.850 % 500 — 500 — — — March 2022 (e) March 2052 3.550 % 650 — 650 — — — March 2022 (e) April 2032 3.400 % 500 — — 500 — — March 2022 (e) April 2052 4.000 % 400 — — 400 — — November 2022 (f) November 2052 5.950 % 500 — — — 500 — Tax-exempt Bonds June 2022 (g) September 2030 4.000 % 168 168 — — — — June 2022 (g) November 2039 4.250 % 234 234 — — — — September 2022 (h) October 2046 3.300 % 200 — — 200 — September 2022 (i) October 2046 3.700 % 210 — — 210 — September 2022 (i) October 2046 4.000 % 42 — — 42 — Total issuances $ 9,186 $ 5,784 $ 1,150 $ 1,352 $ 500 $ 400 (a) Debt issued to repay a portion of outstanding intercompany short-term debt and for general corporate purposes. (b) Duke Energy (Parent) issued 600 million euros aggregate principal amount of 3.10% senior notes due June 2028 and 500 million euros aggregate principal amount of 3.85% senior notes due June 2034. Debt issued to repay a $500 million debt maturity, pay down short-term debt and for general corporate purposes. Duke Energy's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. See Note 15 for additional information. (c) Debt issued to repay a portion of short-term debt and for general corporate purposes. (d) Proceeds will be used to repay a portion of commercial paper and for general corporate purposes. (e) Debt issued to finance or refinance, in whole or in part, existing or new eligible projects under the sustainable financing framework. (f) Debt issued to repay a portion of outstanding intercompany short-term debt and for general company purposes. (g) Debt issued to refund the Ohio Air Quality Development Revenue Refunding bonds, previously held in treasury, which were used to finance or refinance portions of certain solid waste disposal facilities. The mandatory purchase date of these bonds is June 1, 2027. (h) Debt issued to provide funds to refund the prior bonds, which were used to finance or refinance portions of certain air and water pollution control equipment and solid waste disposal equipment. The mandatory purchase date of these bonds is October 1, 2026. (i) Debt issued to provide funds to refund the prior bonds, which were used to finance or refinance portions of certain air and water pollution control equipment and solid waste disposal equipment. The mandatory purchase date of these bonds is October 1, 2030. Year Ended December 31, 2021 Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Florida Piedmont Unsecured Debt March 2021 a) March 2031 2.500 % $ 350 $ — $ — $ — $ — $ 350 June 2021 (b)(c) June 2023 0.299 % 500 500 — — — — June 2021 (c) June 2031 2.550 % 1,000 1,000 — — — — June 2021 (c) June 2041 3.300 % 750 750 — — — — June 2021 (c) June 2051 3.500 % 750 750 — — — — September 2021 (d) January 2082 3.250 % 500 500 — — — — Secured Debt November 2021 (e) July 2031 1.679 % 100 — 100 — — — November 2021 (e) July 2041 2.617 % 137 — 137 — — — November 2021 (e) July 2028 1.295 % 221 — — 221 — — November 2021 (e) July 2037 2.387 % 352 — — 352 — — November 2021 (e) July 2041 2.799 % 197 — — 197 — — First Mortgage Bonds April 2021 (f) April 2031 2.550 % 550 — 550 — — — April 2021 (f) April 2051 3.450 % 450 — 450 — — — August 2021 (g) August 2031 2.000 % 650 — — 650 — — August 2021 (g) August 2051 2.900 % 450 — — 450 — — December 2021 (h) December 2031 2.400 % 650 — — — 650 — December 2021 (h) December 2051 3.000 % 500 — — — 500 — Total issuances $ 8,107 $ 3,500 $ 1,237 $ 1,870 $ 1,150 $ 350 (a) Debt issued to repay at maturity $160 million senior unsecured notes due June 2021, pay down short-term debt and for general corporate purposes. (b) Debt has a floating interest rate. (c) Debt issued to repay $1.75 billion of Duke Energy (Parent) debt maturities, to repay a portion of short-term debt and for general corporate purposes. (d) Debt issued to repay in October 2021 $500 million of Duke Energy (Parent) unsecured notes. The interest rate resets every five years. (e) Debt issued to finance the North Carolina portion of storm restoration expenditures related to Hurricane Florence, Hurricane Michael, Hurricane Dorian and Winter Storm Diego. (f) Debt issued to repay at maturity $500 million first mortgage bonds due June 2021, pay down short-term debt and for general company purposes. (g) Debt issued to repay at maturity a total of $600 million first mortgage bonds due September 2021, pay down short-term debt and for general company purposes. (h) Proceeds were used to finance or refinance, in whole or in part, existing or new eligible projects under the sustainable financing framework. AVAILABLE CREDIT FACILITIES Master Credit Facility In March 2022, Duke Energy amended its existing Master Credit Facility to increase the amount of the facility from $8 billion to $9 billion and to extend the termination date to March 2027. The Duke Energy Registrants, excluding Progress Energy, have borrowing capacity under the Master Credit Facility up to a specified sublimit for each borrower. Duke Energy has the unilateral ability at any time to increase or decrease the borrowing sublimits of each borrower, subject to a maximum sublimit for each borrower. The amount available under the Master Credit Facility has been reduced to backstop issuances of commercial paper, certain letters of credit and variable-rate demand tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder. The table below includes the current borrowing sublimits and available capacity under these credit facilities. December 31, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Energy Energy Energy Energy Energy (in millions) Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Facility size (a) $ 9,000 $ 2,375 $ 1,925 $ 800 $ 1,150 $ 900 $ 1,050 $ 800 Reduction to backstop issuances Commercial paper (b) (3,685) 463 (1,533) (389) (605) (522) (585) (514) Outstanding letters of credit (40) (27) (4) (2) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity $ 5,194 $ 2,811 $ 388 $ 409 $ 538 $ 378 $ 384 $ 286 (a) Represents the sublimit of each borrower. (b) Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies in the Consolidated Balance Sheets. Duke Energy (Parent) Term Loan Facility On March 9, 2022, Duke Energy (Parent) entered into a Term Loan Credit Agreement (Credit Agreement) with commitments totaling $1.4 billion maturing on March 9, 2024. The maturity date of the Credit Agreement may be extended for up to two years by request of Duke Energy (Parent), upon satisfaction of certain conditions contained in the Credit Agreement. Borrowings under the facility were used to repay amounts drawn under the Three-Year Revolving Credit Facility and for general corporate purposes, including repayment of a portion of Duke Energy's outstanding commercial paper. In December 2022, Duke Energy (Parent) repaid $400 million of the term loan. The balance is classified as Long-Term Debt on Duke Energy's Consolidated Balance Sheets. The Three-Year Revolving Credit Facility was terminated in March 2022. Duke Energy Florida Term Loan Facility In October 2022, Duke Energy Florida entered into a term loan facility with commitments totaling $800 million expiring in April 2024. The term loan was fully drawn at the time of closing In October and borrowings were used for storm costs, under-collected fuel and general company purposes. The balance is classified as Long-Term Debt on Duke Energy Florida's Consolidated Balance Sheet. Other Debt Matters In September 2022, Duke Energy filed a Form S-3 with the SEC. Under this Form S-3, which is uncapped, the Duke Energy Registrants, excluding Progress Energy, may issue debt and other securities, including preferred stock, in the future at amounts, prices and with terms to be determined at the time of future offerings. The registration statement was filed to replace a similar prior filing upon expiration of its three-year term and also allows for the issuance of common and preferred stock by Duke Energy. Also in September 2022, to replace another similar prior filing, Duke Energy filed an effective Form S-3 with the SEC to sell up to $4 billion of variable denomination floating-rate demand notes, called PremierNotes. The Form S-3 states that no more than $2 billion of the notes will be outstanding at any particular time. The notes are offered on a continuous basis and bear interest at a floating rate per annum determined by the Duke Energy PremierNotes Committee, or its designee, on a weekly basis. The interest rate payable on notes held by an investor may vary based on the principal amount of the investment. The notes have no stated maturity date, are non-transferable and may be redeemed in whole or in part by Duke Energy or at the investor’s option at any time. The balance as of December 31, 2022, and 2021, was $897 million and $1,066 million, respectively. The notes are short-term debt obligations of Duke Energy and are reflected as Notes payable and commercial paper on Duke Energy’s Consolidated Balance Sheets. Money Pool and Intercompany Credit Agreements The Subsidiary Registrants, excluding Progress Energy, are eligible to receive support for their short-term borrowing needs through participation with Duke Energy and certain of its subsidiaries in a money pool arrangement. Under this arrangement, those companies with short-term funds may provide short-term loans to affiliates participating in this arrangement. The money pool is structured such that the Subsidiary Registrants, excluding Progress Energy, separately manage their cash needs and working capital requirements. Accordingly, there is no net settlement of receivables and payables between money pool participants. Duke Energy (Parent), may loan funds to its participating subsidiaries, but may not borrow funds through the money pool. Accordingly, as the money pool activity is between Duke Energy and its subsidiaries, all money pool balances are eliminated within Duke Energy’s Consolidated Balance Sheets. Money pool receivable balances are reflected within Notes receivable from affiliated companies on the Subsidiary Registrants’ Consolidated Balance Sheets. Money pool payable balances are reflected within either Notes payable to affiliated companies or Long-Term Debt Payable to Affiliated Companies on the Subsidiary Registrants’ Consolidated Balance Sheets. In March 2022, Progress Energy closed a revolving credit agreement with Duke Energy (Parent), which allowed up to $2.5 billion in intercompany borrowings. Restrictive Debt Covenants The Duke Energy Registrants’ debt and credit agreements contain various financial and other covenants. Duke Energy's Master Credit Facility contains a covenant requiring the debt-to-total capitalization ratio not to exceed 65% for each borrower, excluding Piedmont, and 70% for Piedmont. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements. As of December 31, 2022, Duke Energy presented approximately $131 million of long-term debt as current on the Consolidated Balance Sheet as a result of a technical default due to the bankruptcy filing of a Duke Energy customer. The Duke Energy Registrants were in compliance with all other covenants related to their debt agreements as of December 31, 2022. In addition, some credit agreements may allow for acceleration of payments or termination of the agreements due to nonpayment, or acceleration of other significant indebtedness of the borrower or some of its subsidiaries. None of the debt or credit agreements contain material adverse change clauses. Other Loans As of December 31, 2022, and 2021, Duke Energy had loans outstanding of $852 million, including $33 million at Duke Energy Progress and $819 million, including $34 million at Duke Energy Progress, respectively, against the cash surrender value of life insurance policies it owns on the lives of its executives. The amounts outstanding were carried as a reduction of the related cash surrender value that is included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets.

Guarantees and Indemnifications

Guarantees and Indemnifications	12 Months Ended
	Dec. 31, 2022
Guarantees [Abstract]
Guarantees and Indemnifications	GUARANTEES AND INDEMNIFICATIONS Duke Energy has various financial and performance guarantees and indemnifications with non-consolidated entities, which are issued in the normal course of business. As discussed below, these contracts include performance guarantees, standby letters of credit, debt guarantees and indemnifications and include guarantees and indemnifications related to Commercial Renewables Disposal Groups. Duke Energy enters into these arrangements to facilitate commercial transactions with third parties by enhancing the value of the transaction to the third party. At December 31, 2022, Duke Energy does not believe conditions are likely for significant performance under these guarantees. To the extent liabilities are incurred as a result of the activities covered by the guarantees, such liabilities are included on the accompanying Consolidated Balance Sheets. On January 2, 2007, Duke Energy completed the spin-off of its previously wholly owned natural gas businesses to shareholders. Guarantees issued by Duke Energy or its affiliates, or assigned to Duke Energy prior to the spin-off, remained with Duke Energy subsequent to the spin-off. Guarantees issued by Spectra Energy Capital, LLC (Spectra Capital) or its affiliates prior to the spin-off remained with Spectra Capital subsequent to the spin-off, except for guarantees that were later assigned to Duke Energy. Duke Energy has indemnified Spectra Capital against any losses incurred under certain of the guarantee obligations that remain with Spectra Capital. At December 31, 2022, the maximum potential amount of future payments associated with these guarantees were $40 million, the majority of which expire by 2028. In October 2017, ACP executed a $3.4 billion revolving credit facility with a stated maturity date of October 2021. Duke Energy entered into a guarantee agreement to support its share of the ACP revolving credit facility. In July 2020, ACP reduced the size of the credit facility to $1.9 billion. Duke Energy's maximum exposure to loss under the terms of the guarantee was $860 million as of December 31, 2020. This amount represented 47% of the outstanding borrowings under the credit facility and was recognized within Other Current Liabilities on the Consolidated Balance Sheets at December 31, 2020, of which $95 million was previously recognized due the adoption of new guidance for credit losses effective January 1, 2020. In February 2021, Duke Energy paid approximately $855 million to fund ACP's outstanding debt, relieving Duke Energy of its guarantee. See Notes 4 and 13 for more information. In addition to the Spectra Capital and ACP revolving credit facility guarantees above, Duke Energy has issued performance guarantees to customers and other third parties that guarantee the payment and performance of other parties, including certain non-wholly owned entities, as well as guarantees of debt of certain non-consolidated entities. If such entities were to default on payments or performance, Duke Energy would be required under the guarantees to make payments on the obligations of these entities. The maximum potential amount of future payments required under these guarantees as of December 31, 2022, was $33 million of which all expire between 2024 and 2030, with the remaining performance guarantees having no contractual expiration. Additionally, certain guarantees have uncapped maximum potential payments; however, Duke Energy does not believe these guarantees will have a material effect on its results of operations, cash flows or financial position. Duke Energy uses bank-issued standby letters of credit to secure the performance of wholly owned and non-wholly owned entities to a third party or customer. Under these arrangements, Duke Energy has payment obligations to the issuing bank that are triggered by a draw by the third party or customer due to the failure of the wholly owned or non-wholly owned entity to perform according to the terms of its underlying contract. At December 31, 2022, Duke Energy had issued a total of $667 million in letters of credit, which expire between 2023 and 2028. The unused amount under these letters of credit was $35 million.

Joint Ownership of Generating a

Joint Ownership of Generating and Transmission Facilities	12 Months Ended
	Dec. 31, 2022
Joint Ownership Of Generating And Transmission Facilities [Abstract]
Joint Ownership of Generating and Transmission Facilities	JOINT OWNERSHIP OF GENERATING AND TRANSMISSION FACILITIESThe Duke Energy Registrants maintain ownership interests in certain jointly owned generating and transmission facilities. The Duke Energy Registrants are entitled to a share of the generating capacity and output of each unit equal to their respective ownership interests. The Duke Energy Registrants pay their ownership share of additional construction costs, fuel inventory purchases and operating expenses. The Duke Energy Registrants share of revenues and operating costs of the jointly owned facilities is included within the corresponding line in the Consolidated Statements of Operations. Each participant in the jointly owned facilities must provide its own financing. The following table presents the Duke Energy Registrants' interest of jointly owned plant or facilities and amounts included on the Consolidated Balance Sheets. All facilities are operated by the Duke Energy Registrants and are included in the Electric Utilities and Infrastructure segment. December 31, 2022 Construction Ownership Property, Plant Accumulated Work in (in millions except for ownership interest) Interest and Equipment Depreciation Progress Duke Energy Carolinas Catawba (units 1 and 2) (a) 19.25 % $ 1,047 $ 546 $ 32 W.S. Lee CC (b) 87.27 % 613 86 48 Duke Energy Indiana Gibson (unit 5) (c) 50.05 % 450 241 2 Vermillion (d) 62.50 % 182 113 1 Transmission and local facilities (c) Various 6,718 1,510 157 (a) Jointly owned with North Carolina Municipal Power Agency Number 1, NCEMC and PMPA. (b) Jointly owned with NCEMC. (c) Jointly owned with WVPA and IMPA. (d) Jointly owned with WVPA.

Asset Retirement Obligations

Asset Retirement Obligations	12 Months Ended
	Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	ASSET RETIREMENT OBLIGATIONS Duke Energy records an ARO when it has a legal obligation to incur retirement costs associated with the retirement of a long-lived asset and the obligation can be reasonably estimated. Certain assets of the Duke Energy Registrants have an indeterminate life, such as transmission and distribution facilities, and thus the fair value of the retirement obligation is not reasonably estimable. A liability for these AROs will be recorded when a fair value is determinable. The Duke Energy Registrants’ regulated operations accrue costs of removal for property that does not have an associated legal retirement obligation based on regulatory orders from state commissions. These costs of removal are recorded as a regulatory liability in accordance with regulatory accounting treatment. The Duke Energy Registrants do not accrue the estimated cost of removal for any nonregulated assets. See Note 4 for the estimated cost of removal for assets without an associated legal retirement obligation, which are included in Regulatory liabilities on the Consolidated Balance Sheets. The following table presents the AROs recorded on the Consolidated Balance Sheets. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Decommissioning of nuclear power facilities (a) $ 7,261 $ 3,009 $ 4,217 $ 3,948 $ 270 $ — $ — $ — Closure of ash impoundments 5,176 2,309 1,862 1,833 29 95 911 — Other 291 64 102 42 59 59 40 26 Total asset retirement obligation $ 12,728 $ 5,382 $ 6,181 $ 5,823 $ 358 $ 154 $ 951 $ 26 Less: Current portion 773 261 289 288 1 17 207 — Total noncurrent asset retirement obligation $ 11,955 $ 5,121 $ 5,892 $ 5,535 $ 357 $ 137 $ 744 $ 26 (a) Duke Energy amount includes purchase accounting adjustments related to the merger with Progress Energy. Nuclear Decommissioning Liability AROs related to nuclear decommissioning are based on site-specific cost studies. The NCUC, PSCSC and FPSC require updated cost estimates for decommissioning nuclear plants every five years. The following table summarizes information about the most recent site-specific nuclear decommissioning cost studies. Decommissioning costs are stated in 2018 or 2019 dollars, depending on the year of the cost study, and include costs to decommission plant components not subject to radioactive contamination. Annual Funding Decommissioning (in millions) Requirement (a) Costs (a) Year of Cost Study Duke Energy $ 10 $ 9,105 2018 or 2019 Duke Energy Carolinas (b)(c) — 4,365 2018 Duke Energy Progress (d) 10 4,181 2019 Duke Energy Florida (e) — 559 N/A (a) Amount represents annual funding requirement for the current fiscal year. Amounts for Progress Energy equal the sum of Duke Energy Progress and Duke Energy Florida. (b) Decommissioning costs for Duke Energy Carolinas reflects its ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors. (c) Duke Energy Carolinas' site-specific nuclear decommissioning cost study completed in 2018 was filed with the NCUC and PSCSC in 2019. A new funding study was also completed and filed with the NCUC and PSCSC in 2019. (d) Duke Energy Progress' site-specific nuclear decommissioning cost study completed in 2019 was filed with the NCUC and PSCSC in March 2020. Duke Energy Progress also completed a funding study, which was filed with the NCUC and PSCSC in July 2020. In October 2021, Duke Energy Progress filed the 2019 nuclear decommissioning cost study with the FERC, as well as a revised rate schedule for decommissioning expense to be collected from wholesale customers. The FERC accepted the filing, as filed on December 9, 2021. (e) During 2019, Duke Energy Florida reached an agreement to transfer decommissioning work for Crystal River Unit 3 to a third party and decommissioning costs are based on the agreement with this third party rather than a cost study. Regulatory approval was received from the NRC and the FPSC in April 2020 and August 2020, respectively. Nuclear Decommissioning Trust Funds Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida each maintain NDTFs that are intended to pay for the decommissioning costs of their respective nuclear power plants. The NDTF investments are managed and invested in accordance with applicable requirements of various regulatory bodies including the NRC, FERC, NCUC, PSCSC, FPSC and the IRS. Use of the NDTF investments is restricted to nuclear decommissioning activities including license termination, spent fuel and site restoration. The license termination and spent fuel obligations relate to contaminated decommissioning and are recorded as AROs. The site restoration obligation relates to non-contaminated decommissioning and is recorded to cost of removal within Regulatory liabilities on the Consolidated Balance Sheets. The following table presents the fair value of NDTF assets legally restricted for purposes of settling AROs associated with nuclear decommissioning. Duke Energy Florida entered into an agreement with a third party to decommission Crystal River Unit 3 and was granted an exemption from the NRC, which allows for use of the NDTF for all aspects of nuclear decommissioning. The entire balance of Duke Energy Florida's NDTF may be applied toward license termination, spent fuel and site restoration costs incurred to decommission Crystal River Unit 3 and is excluded from the table below. See Note 17 for additional information related to the fair value of the Duke Energy Registrants' NDTFs. December 31, (in millions) 2022 2021 Duke Energy $ 7,466 $ 8,933 Duke Energy Carolinas 4,208 5,068 Duke Energy Progress 3,258 3,865 Nuclear Operating Licenses As described in Note 4, Duke Energy Carolinas and Duke Energy Progress intend to seek renewal of operating licenses and 20-year license extensions for all of their nuclear stations. The following table includes the current expiration of nuclear operating licenses. Unit Year of Expiration Duke Energy Carolinas Catawba Units 1 and 2 2043 McGuire Unit 1 2041 McGuire Unit 2 2043 Oconee Units 1 and 2 2033 Oconee Unit 3 2034 Duke Energy Progress Brunswick Unit 1 2036 Brunswick Unit 2 2034 Harris 2046 Robinson 2030 The NRC has acknowledged permanent cessation of operation and permanent removal of fuel from the reactor vessel at Crystal River Unit 3. Therefore, the license no longer authorizes operation of the reactor. During 2019, Duke Energy Florida entered into an agreement for the accelerated decommissioning of Crystal River Unit 3. Regulatory approval was received from the NRC and the FPSC in April 2020 and August 2020, respectively. See Note 4 for more information. Closure of Ash Impoundments The Duke Energy Registrants are subject to state and federal regulations covering the closure of coal ash impoundments, including the EPA CCR rule and the Coal Ash Act, and other agreements. AROs recorded on the Duke Energy Registrants' Consolidated Balance Sheets include the legal obligation for closure of coal ash basins and the disposal of related ash as a result of these regulations and agreements. The ARO amount recorded on the Consolidated Balance Sheets is based upon estimated closure costs for impacted ash impoundments. The amount recorded represents the discounted cash flows for estimated closure costs based upon specific closure plans. Actual costs to be incurred will be dependent upon factors that vary from site to site. The most significant factors are the method and time frame of closure at the individual sites. Closure methods considered include removing the water from ash basins, consolidating material as necessary and capping the ash with a synthetic barrier, excavating and relocating the ash to a lined structural fill or lined landfill or recycling the ash for concrete or some other beneficial use. The ultimate method and timetable for closure will be in compliance with standards set by federal and state regulations and other agreements. The ARO amount will be adjusted as additional information is gained through the closure and post-closure process, including acceptance and approval of compliance approaches, which may change management assumptions, and may result in a material change to the balance. See ARO Liability Rollforward section below for information on revisions made to the coal ash liability during 2022 and 2021. Asset retirement costs associated with the AROs for operating plants and retired plants are included in Net property, plant and equipment and Regulatory assets, respectively, on the Consolidated Balance Sheets. See Note 4 for additional information on Regulatory assets related to AROs and Note 5 for additional information on commitments and contingencies. Cost recovery for future expenditures will be pursued through the normal ratemaking process with federal and state utility commissions, which permit recovery of necessary and prudently incurred costs associated with Duke Energy’s regulated operations. See Note 4 for additional information on recovery of coal ash costs. ARO Liability Rollforward The following tables present changes in the liability associated with AROs. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2020 $ 12,854 $ 5,350 $ 6,149 $ 5,635 $ 514 $ 111 $ 1,176 $ 20 Accretion expense (a) 504 242 229 212 17 4 35 1 Liabilities settled (b) (613) (210) (324) (214) (110) (3) (77) — Liabilities incurred in the current year 14 8 6 — 6 — — — Revisions in estimates of cash flows (c) (159) (89) 52 42 10 24 (147) 1 Balance at December 31, 2021 12,600 5,301 6,112 5,675 437 136 987 22 Accretion expense (a) 501 242 229 215 14 6 30 1 Liabilities settled (b) (680) (234) (334) (228) (106) (13) (98) — Liabilities incurred in the current year 22 — 18 — 18 — 5 — Revisions in estimates of cash flows (c) 285 73 156 161 (5) 25 27 3 Balance at December 31, 2022 $ 12,728 $ 5,382 $ 6,181 $ 5,823 $ 358 $ 154 $ 951 $ 26 (a) Substantially all accretion expense for the years ended December 31, 2022, and 2021, relates to Duke Energy’s regulated operations and has been deferred in accordance with regulatory accounting treatment. (b) Amounts primarily relate to ash impoundment closures and nuclear decommissioning. (c) The amounts recorded represent the discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The increases in 2022 primarily relate to higher unit costs associated with basin closure and routine maintenance. The decreases in 2021 primarily relate to revised basin closure cost estimates, partially offset by increases related to new closure plan approvals, post closure maintenance and beneficiation costs.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT The following tables summarize the property, plant and equipment for Duke Energy and its subsidiary registrants. December 31, 2022 Average Remaining Duke Duke Duke Duke Duke Useful Life Duke Energy Progress Energy Energy Energy Energy (in millions) (Years) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Land $ 2,232 $ 565 $ 993 $ 496 $ 497 $ 230 $ 124 $ 295 Plant – Regulated Electric generation, distribution and transmission 39 126,016 46,640 55,872 33,336 22,536 6,900 16,604 — Natural gas transmission and distribution 56 13,174 — — — — 3,773 — 9,401 Other buildings and improvements 40 2,537 973 647 341 306 398 336 183 Plant – Nonregulated Other buildings and improvements 10 369 — — — — — — — Nuclear fuel 3,081 1,723 1,358 1,358 — — — — Equipment 13 2,959 710 936 567 369 441 356 125 Construction in process 7,381 2,671 3,073 1,317 1,756 375 381 478 Other 15 6,090 1,368 1,943 1,460 476 380 320 387 Total property, plant and equipment (a) 163,839 54,650 64,822 38,875 25,940 12,497 18,121 10,869 Total accumulated depreciation – regulated (b)(c) (50,544) (18,669) (20,584) (14,201) (6,377) (3,250) (6,021) (2,081) Total accumulated depreciation – nonregulated (d) (1,556) — — — — — — — Facilities to be retired, net 9 — — — — — — 9 Total net property, plant and equipment $ 111,748 $ 35,981 $ 44,238 $ 24,674 $ 19,563 $ 9,247 $ 12,100 $ 8,797 (a) Includes finance leases of $816 million, $335 million, $674 million, $590 million, $84 million and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $233 million, $81 million and $152 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,683 million, $934 million, $749 million and $749 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $7 million, $51 million and $4 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of ($1 million) at Duke Energy. December 31, 2021 Average Remaining Duke Duke Duke Duke Duke Useful Life Duke Energy Progress Energy Energy Energy Energy (in millions) (Years) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Land $ 2,145 $ 543 $ 957 $ 482 $ 475 $ 219 $ 122 $ 279 Plant – Regulated Electric generation, distribution and transmission 40 120,855 44,910 53,447 32,417 21,030 6,573 15,925 — Natural gas transmission and distribution 54 12,079 — — — — 3,347 — 8,732 Other buildings and improvements 37 1,921 550 514 228 286 381 321 155 Plant – Nonregulated Other buildings and improvements 11 401 — — — — — — — Nuclear fuel 3,181 1,856 1,325 1,325 — — — — Equipment 13 2,659 614 791 497 294 403 262 122 Construction in process 5,979 2,078 2,297 954 1,343 515 460 262 Other 14 5,276 1,323 1,563 1,115 437 287 253 368 Total property, plant and equipment (a) 154,496 51,874 60,894 37,018 23,865 11,725 17,343 9,918 Total accumulated depreciation – regulated (b)(c) (47,611) (17,854) (19,214) (13,387) (5,819) (3,106) (5,583) (1,899) Total accumulated depreciation – nonregulated (d) (1,493) — — — — — — — Facilities to be retired, net 144 102 26 26 — 6 — 11 Total net property, plant and equipment $ 105,536 $ 34,122 $ 41,706 $ 23,657 $ 18,046 $ 8,625 $ 11,760 $ 8,030 (a) Includes finance leases of $958 million, $335 million, $729 million, $627 million, $102 million, and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $178 million, $45 million and $133 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,799 million, $1,064 million, $735 million and $735 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $9 million, $33 million, and $3 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of ($1 million) at Duke Energy. Duke Energy continues to execute on its business transformation strategy, including the evaluation of in-office work policies considering the experience with the COVID-19 pandemic and also workforce realignment of roles and responsibilities. In May 2021, Duke Energy management approved the sale of certain properties and entered into an agreement to exit certain leased space on December 31, 2021. The sale of the properties is subject to abandonment accounting and resulted in an impairment charge. Additionally, the exit of the leased space resulted in the impairment of related furniture, fixtures and equipment. During the year ended December 31, 2021, Duke Energy recorded a pretax charge to earnings of $192 million on the Consolidated Statements of Operations, which includes $133 million within Impairment of assets and other charges, $42 million within Operations, maintenance and other and $17 million within Depreciation and amortization. The following table presents capitalized interest, which includes the debt component of AFUDC. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy $ 118 $ 66 $ 96 Duke Energy Carolinas 50 29 28 Progress Energy 26 20 17 Duke Energy Progress 19 14 12 Duke Energy Florida 7 6 5 Duke Energy Ohio 14 20 26 Duke Energy Indiana (a) 3 (17) 10 Piedmont 4 9 8 (a) In 2021, Duke Energy Indiana is primarily compromised of ($24 million) of PISCC amortization, which is partially offset by $7 million of the debt component of AFUDC.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	GOODWILL AND INTANGIBLE ASSETS GOODWILL Duke Energy Duke Energy's Goodwill balance of $19.3 billion is allocated $17.4 billion to EU&I and $1.9 billion to GU&I on Duke Energy's Consolidated Balance Sheets at December 31, 2022, and 2021. There are no accumulated impairment charges. Duke Energy Ohio Duke Energy Ohio's Goodwill balance of $920 million, allocated $596 million to EU&I and $324 million to GU&I, is presented net of accumulated impairment charges of $216 million on the Consolidated Balance Sheets at December 31, 2022, and 2021. Progress Energy Progress Energy's Goodwill is included in the EU&I segment and there are no accumulated impairment charges. Piedmont Piedmont's Goodwill is included in the GU&I segment and there are no accumulated impairment charges. Goodwill Impairment Testing Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont are required to perform an annual goodwill impairment test as of the same date each year and, accordingly, perform their annual impairment testing of goodwill as of August 31. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update their test between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. As the fair value for Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont exceeded their respective carrying values at the date of the annual impairment analysis, no goodwill impairment charges were recorded in 2022. INTANGIBLE ASSETS The following tables show the carrying amount and accumulated amortization of intangible assets included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets of the Duke Energy Registrants at December 31, 2022, and 2021. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Emission allowances $ 8 $ — $ 5 $ 2 $ 3 $ — $ 2 $ — Renewable energy certificates 210 84 124 124 — 2 — — Other 55 — 4 1 3 — — 22 Total gross carrying amounts 273 84 133 127 6 2 2 22 Accumulated amortization – other (8) — (1) — (1) — — (2) Total accumulated amortization (8) — (1) — (1) — — (2) Total intangible assets, net $ 265 $ 84 $ 132 $ 127 $ 5 $ 2 $ 2 $ 20 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Emission allowances $ 8 $ — $ 5 $ 2 $ 3 $ — $ 2 $ — Renewable energy certificates 204 73 131 131 — — — — Natural gas, coal and power contracts 24 — — — — — 24 — Other 28 — — — — — — — Total gross carrying amounts 264 73 136 133 3 — 26 — Accumulated amortization – natural gas, coal and power contracts (24) — — — — — (24) — Accumulated amortization – other (4) — — — — — — — Total accumulated amortization (28) — — — — — (24) — Total intangible assets, net $ 236 $ 73 $ 136 $ 133 $ 3 $ — $ 2 $ — Amortization Expense Amortization expense amounts for other intangible assets are immaterial for the years ended December 31, 2022, 2021 and 2020, and are expected to be immaterial for the next five years as of December 31, 2022.

Investments in Unconsolidated A

Investments in Unconsolidated Affiliates	12 Months Ended
	Dec. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Affiliates	INVESTMENTS IN UNCONSOLIDATED AFFILIATES EQUITY METHOD INVESTMENTS Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method. The following table presents Duke Energy’s investments in unconsolidated affiliates accounted for under the equity method, as well as the respective equity in earnings, by segment, for periods presented in this filing. Years Ended December 31, 2022 2021 2020 Equity in Equity in Equity in earnings earnings earnings (in millions) Investments (losses) Investments (losses) (losses) Electric Utilities and Infrastructure $ 99 $ 7 $ 104 $ 7 $ (1) Gas Utilities and Infrastructure 240 21 231 8 (2,017) Other 116 85 122 47 13 Total $ 455 $ 113 $ 457 $ 62 $ (2,005) During the years ended December 31, 2022, 2021 and 2020, Duke Energy received distributions from equity investments of $111 million, $56 million and $34 million, respectively, which are included in Other assets within Cash Flows from Operating Activities on the Consolidated Statements of Cash Flows. During the years ended December 31, 2022, 2021 and 2020, Duke Energy received distributions from equity investments of $6 million, $14 million and $23 million, respectively, which are included in Return of investment capital within Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows. During the years ended December 31, 2022, 2021 and 2020, Piedmont received distributions from equity investments of $31 million, $8 million and $2 million, respectively, which are included in Other assets within Cash Flows from Operating Activities. During the years ended December 31, 2021, and 2020, Piedmont received distributions from equity investments of $2 million and $2 million, respectively, which are included within Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows. Amounts received during the year ended December 31, 2022, included in Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows were immaterial. Significant investments in affiliates accounted for under the equity method are discussed below. Electric Utilities and Infrastructure Duke Energy owns 50% interests in both DATC and Pioneer, which build, own and operate electric transmission facilities in North America. Gas Utilities and Infrastructure Pipeline Investments Piedmont owns a 21.49% investment in Cardinal, an intrastate pipeline located in North Carolina. Duke Energy owns a 7.5% interest in Sabal Trail, a 517-mile interstate natural gas pipeline, which provides natural gas to Duke Energy Florida and Florida Power and Light. Duke Energy owns a 47% interest in the ACP pipeline. In 2020, Duke Energy determined it would no longer continue its investment in the construction of the ACP pipeline. See Notes 4 and 8 for further information. Storage Facilities Piedmont owns a 45% interest in Pine Needle, an interstate LNG storage facility located in North Carolina, and a 50% interest in Hardy Storage, an underground interstate natural gas storage facility located in West Virginia. Renewable Natural Gas Investments Duke Energy owns a 29.68% investment in SustainRNG, a developer of renewable natural gas projects, a 70% interest in Sustain T&W, SustainRNG's renewable natural gas project located in Georgia, and a 70% interest in Sustain Liberty, SustainRNG's renewable natural gas project located in North Carolina. Other Duke Energy has a 17.5% indirect economic ownership interest and a 25% board representation and voting rights interest in NMC, which owns and operates a methanol and MTBE business in Jubail, Saudi Arabia. Significant Subsidiaries For the year ended December 31, 2020, Duke Energy's investment in ACP met the requirements of S-X Rule 4-08(g) to provide summarized financial information. The following table provides summary information for ACP as required under S-X Rule 1-02(bb) for the period of significance in Duke Energy's consolidated statements of operations. For the years ended December 31, 2022, and 2021, there were no investments that met the significance requirements. Year Ended December 31, 2020 Net revenues $ — Operating loss (4,612) Net loss (4,512) Net loss attributable to Duke Energy $ (2,121)

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS The Subsidiary Registrants engage in related party transactions in accordance with the applicable state and federal commission regulations. Refer to the Consolidated Balance Sheets of the Subsidiary Registrants for balances due to or due from related parties. Material amounts related to transactions with related parties included in the Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 838 $ 894 $ 753 Indemnification coverages (b) 28 24 20 Joint Dispatch Agreement (JDA) revenue (c) 109 41 25 JDA expense (c) 600 207 114 Intercompany natural gas purchases (d) 12 11 15 Progress Energy Corporate governance and shared service expenses (a) $ 818 $ 856 $ 715 Indemnification coverages (b) 43 41 36 JDA revenue (c) 600 207 114 JDA expense (c) 109 41 25 Intercompany natural gas purchases (d) 76 75 75 Duke Energy Progress Corporate governance and shared service expenses (a) $ 469 $ 504 $ 420 Indemnification coverages (b) 20 19 17 JDA revenue (c) 600 207 114 JDA expense (c) 109 41 25 Intercompany natural gas purchases (d) 76 75 75 Duke Energy Florida Corporate governance and shared service expenses (a) $ 349 $ 352 $ 295 Indemnification coverages (b) 23 22 19 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 334 $ 329 $ 326 Indemnification coverages (b) 5 4 4 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 447 $ 409 $ 401 Indemnification coverages (b) 8 8 8 Piedmont Corporate governance and shared service expenses (a) $ 155 $ 139 $ 140 Indemnification coverages (b) 3 3 3 Intercompany natural gas sales (d) 88 86 90 Natural gas storage and transportation costs (e) 23 22 23 (a) The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other on the Consolidated Statements of Operations and Comprehensive Income. (b) The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Consolidated Statements of Operations and Comprehensive Income. (c) Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Consolidated Statements of Operations and Comprehensive Income. (d) Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Consolidated Statements of Operations and Comprehensive Income. These intercompany revenues and expenses are eliminated in consolidation. (e) Piedmont has related party transactions as a customer of its equity method investments in Pine Needle, Hardy Storage, and Cardinal natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Consolidated Statements of Operations and Comprehensive Income. In addition to the amounts presented above, the Subsidiary Registrants have other affiliate transactions, including rental of office space, participation in a money pool arrangement, other operational transactions and their proportionate share of certain charged expenses. See Note 7 for more information regarding money pool. These transactions of the Subsidiary Registrants are incurred in the ordinary course of business and are eliminated in consolidation. As discussed in Note 18, certain trade receivables have been sold by Duke Energy Ohio and Duke Energy Indiana to CRC, an affiliate formed by a subsidiary of Duke Energy. The proceeds obtained from the sales of receivables are largely cash but do include a subordinated note from CRC for a portion of the purchase price. Intercompany Income Taxes Duke Energy and the Subsidiary Registrants file a consolidated federal income tax return and other state and jurisdictional returns. The Subsidiary Registrants have a tax sharing agreement with Duke Energy for the allocation of consolidated tax liabilities and benefits. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. The following table includes the balance of intercompany income tax receivables and payables for the Subsidiary Registrants. Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont December 31, 2022 Intercompany income tax receivable $ — $ 95 $ 36 $ 17 $ — $ — $ — Intercompany income tax payable 37 — — — 17 18 38 December 31, 2021 Intercompany income tax receivable $ — $ — $ — $ 40 $ 19 $ — $ — Intercompany income tax payable 62 — 84 — — 10 27

Derivatives and Hedging

Derivatives and Hedging	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	DERIVATIVES AND HEDGING The Duke Energy Registrants use commodity, interest rate and foreign currency contracts to manage commodity price risk, interest rate risk and foreign currency exchange rate risk. The primary use of commodity derivatives is to hedge the generation portfolio against changes in the prices of electricity and natural gas. Piedmont enters into natural gas supply contracts to provide diversification, reliability and natural gas cost benefits to its customers. Interest rate derivatives are used to manage interest rate risk associated with borrowings. Foreign currency derivatives are used to manage risk related to foreign currency exchange rates on certain issuances of debt. Derivatives related to interest rate risk for the Commercial Renewables Disposal Groups are included in the following disclosures. See Note 2 for further information. All derivative instruments not identified as NPNS are recorded at fair value as assets or liabilities on the Consolidated Balance Sheets. Cash collateral related to derivative instruments executed under master netting arrangements is offset against the collateralized derivatives on the Consolidated Balance Sheets. The cash impacts of settled derivatives are recorded as operating activities on the Consolidated Statements of Cash Flows. INTEREST RATE RISK The Duke Energy Registrants are exposed to changes in interest rates as a result of their issuance or anticipated issuance of variable-rate and fixed-rate debt and commercial paper. Interest rate risk is managed by limiting variable-rate exposures to a percentage of total debt and by monitoring changes in interest rates. To manage risk associated with changes in interest rates, the Duke Energy Registrants may enter into interest rate swaps, U.S. Treasury lock agreements and other financial contracts. In anticipation of certain fixed-rate debt issuances, a series of forward-starting interest rate swaps or Treasury locks may be executed to lock in components of current market interest rates. These instruments are later terminated prior to or upon the issuance of the corresponding debt. Cash Flow Hedges For a derivative designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the effective portion of the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Amounts for interest rate contracts are reclassified to earnings as interest expense over the term of the related debt. See Note 2 for information on the de-designation of interest rate swaps and related gain reclassified out of AOCI for the year ended December 31, 2022, related to the Commercial Renewables Disposal Groups. Gains and losses reclassified out of AOCI for the years ended December 31, 2021, and 2020, were not material. Duke Energy's interest rate derivatives designated as hedges include forward-starting interest rate swaps not accounted for under regulatory accounting. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Consolidated Statements of Operations and Comprehensive Income. The following tables show notional amounts of outstanding derivatives related to interest rate risk. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 500 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,979 1,250 800 500 300 300 27 Total notional amount $ 3,479 $ 1,250 $ 800 $ 500 $ 300 $ 300 $ 27 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Indiana Ohio Cash flow hedges $ 2,415 $ — $ — $ — $ — $ — Undesignated contracts 1,177 350 500 500 300 27 Total notional amount $ 3,592 $ 350 $ 500 $ 500 $ 300 $ 27 COMMODITY PRICE RISK The Duke Energy Registrants are exposed to the impact of changes in the prices of electricity purchased and sold in bulk power markets and natural gas purchases, including Piedmont's natural gas supply contracts. Exposure to commodity price risk is influenced by a number of factors including the term of contracts, the liquidity of markets and delivery locations. To manage risk associated with commodity prices, the Duke Energy Registrants may enter into long-term power purchase or sales contracts and long-term natural gas supply agreements. Undesignated Contracts For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas cost volatility for customers. Volumes The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 14,086 — — — 1,820 12,266 — Natural gas (millions of Dth) 909 307 292 292 — 11 299 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 12,369 — — — 1,681 10,688 — Natural gas (millions of Dth) 823 264 215 215 — 8 336 FOREIGN CURRENCY RISK Duke Energy may enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars. Fair Value Hedges Derivatives related to existing fixed rate securities are accounted for as fair value hedges, where the derivatives’ fair value gains or losses and hedged items’ fair value gains or losses are both recorded directly to earnings on the same income statement line item, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. Duke Energy has elected to exclude the cross-currency basis spread from the assessment of effectiveness in the fair value hedges of its foreign currency risk and record any difference between the change in the fair value of the excluded components and the amounts recognized in earnings as a component of other comprehensive income or loss. The following table shows Duke Energy's outstanding derivatives related to foreign currency risk. There were no fair value hedges in 2021. December 31, 2022 Receive Fair Value Pay Notional Notional Receive Hedge Gain (Loss) (a) (in millions) Pay Rate (in millions) Rate Maturity Date (in millions) Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ (3) 537 5.31 % 500 euros 3.85 % June 2034 (2) Total notional amount $ 1,182 1,100 euros $ (5) (a) Amounts are recorded in Other Income and expenses, net on the Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Consolidated Statements of Comprehensive Income for amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded. LOCATION AND FAIR VALUE OF DERIVATIVE ASSETS AND LIABILITIES RECOGNIZED IN THE CONSOLIDATED BALANCE SHEETS The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown. Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 265 $ 132 $ 99 $ 99 $ — $ 5 $ 29 $ — Noncurrent 213 104 108 108 — — — — Total Derivative Assets – Commodity Contracts $ 478 $ 236 $ 207 $ 207 $ — $ 5 $ 29 $ — Interest Rate Contracts Designated as Hedging Instruments Current $ 101 $ — $ — $ — $ — $ — $ — $ — Not Designated as Hedging Instruments Current $ 228 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Noncurrent 29 — — — — — — — Total Derivative Assets – Interest Rate Contracts $ 358 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets $ 836 $ 330 $ 248 $ 230 $ 17 $ 5 $ 110 $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 175 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Noncurrent 202 31 30 30 — — — 141 Total Derivative Liabilities – Commodity Contracts $ 377 $ 127 $ 66 $ 48 $ 19 $ — $ 16 $ 168 Interest Rate Contracts Not Designated as Hedging Instruments Noncurrent 2 — — — — 2 — — Total Derivative Liabilities – Interest Rate Contracts $ 2 $ — $ — $ — $ — $ 2 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 40 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 58 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 437 $ 127 $ 66 $ 48 $ 19 $ 2 $ 16 $ 168 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 199 $ 99 $ 72 $ 72 $ — $ 2 $ 23 $ 3 Noncurrent 113 63 50 50 — — — — Total Derivative Assets – Commodity Contracts $ 312 $ 162 $ 122 $ 122 $ — $ 2 $ 23 $ 3 Interest Rate Contracts Designated as Hedging Instruments Current $ 3 $ — $ — $ — $ — $ — $ — $ — Noncurrent 3 — — — — — — — Not Designated as Hedging Instruments Current $ 2 $ — $ 2 $ 2 $ — $ — $ — $ — Total Derivative Assets – Interest Rate Contracts $ 8 $ — $ 2 $ 2 $ — $ — $ — $ — Total Derivative Assets $ 320 $ 162 $ 124 $ 124 $ — $ 2 $ 23 $ 3 Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Not Designated as Hedging Instruments Current $ 72 $ 18 $ 19 $ 5 $ 14 $ — $ 13 $ 21 Noncurrent 132 9 5 5 — — — 118 Total Derivative Liabilities – Commodity Contracts $ 204 $ 27 $ 24 $ 10 $ 14 $ — $ 13 $ 139 Interest Rate Contracts Designated as Hedging Instruments Current $ 75 $ — $ — $ — $ — $ — $ — $ — Noncurrent 21 — — — — — — — Not Designated as Hedging Instruments Current 10 8 — — — 1 — — Noncurrent 18 — — — — 4 14 — Total Derivative Liabilities – Interest Rate Contracts $ 124 $ 8 $ — $ — $ — $ 5 $ 14 $ — Total Derivative Liabilities $ 328 $ 35 $ 24 $ 10 $ 14 $ 5 $ 27 $ 139 OFFSETTING ASSETS AND LIABILITIES The following tables present the line items on the Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 594 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Gross amounts offset (64) (33) (30) (30) — — — — Net amounts presented in Current Assets: Other $ 530 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 242 $ 104 $ 108 $ 108 $ — $ — $ — $ — Gross amounts offset (97) (40) (57) (57) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 145 $ 64 $ 51 $ 51 $ — $ — $ — $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 193 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Gross amounts offset (49) (15) (18) (18) — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Gross amounts offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 204 $ 99 $ 74 $ 74 $ — $ 2 $ 23 $ 3 Gross amounts offset (25) (16) (9) (9) — — — — Net amounts presented in Current Assets: Other $ 179 $ 83 $ 65 $ 65 $ — $ 2 $ 23 $ 3 Noncurrent Gross amounts recognized $ 116 $ 63 $ 50 $ 50 $ — $ — $ — $ — Gross amounts offset (23) (15) (8) (8) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 93 $ 48 $ 42 $ 42 $ — $ — $ — $ — Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 157 $ 26 $ 19 $ 5 $ 14 $ 1 $ 13 $ 21 Gross amounts offset (11) (6) (5) (5) — — — — Net amounts presented in Current Liabilities: Other $ 146 $ 20 $ 14 $ — $ 14 $ 1 $ 13 $ 21 Noncurrent Gross amounts recognized $ 171 $ 9 $ 5 $ 5 $ — $ 4 $ 14 $ 118 Gross amounts offset (12) (8) (5) (5) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 159 $ 1 $ — $ — $ — $ 4 $ 14 $ 118 OBJECTIVE CREDIT CONTINGENT FEATURES Certain derivative contracts contain objective credit contingent features. These features include the requirement to post cash collateral or letters of credit if specific events occur, such as a credit rating downgrade below investment grade. The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit risk-related payment provisions. December 31, 2022 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Aggregate fair value of derivatives in a net liability position $ 141 $ 86 $ 55 $ 48 $ 7 Fair value of collateral already posted — — — — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 141 86 55 48 7 December 31, 2021 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Aggregate fair value of derivatives in a net liability position $ 32 $ 18 $ 14 $ 10 $ 4 Fair value of collateral already posted — — — — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 32 18 14 10 4 The Duke Energy Registrants have elected to offset cash collateral and fair values of derivatives. For amounts to be netted, the derivative and cash collateral must be executed with the same counterparty under the same master netting arrangement.

Investments in Debt and Equity

Investments in Debt and Equity Securities	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Equity Securities	INVESTMENTS IN DEBT AND EQUITY SECURITIES Duke Energy’s investments in debt and equity securities are primarily comprised of investments held in (i) the NDTF at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, (ii) the grantor trusts at Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana related to OPEB plans and (iii) Bison. The Duke Energy Registrants classify investments in debt securities as AFS and investments in equity securities as FV-NI. For investments in debt securities classified as AFS, the unrealized gains and losses are included in other comprehensive income until realized, at which time they are reported through net income. For investments in equity securities classified as FV-NI, both realized and unrealized gains and losses are reported through net income. Substantially all of Duke Energy’s investments in debt and equity securities qualify for regulatory accounting, and accordingly, all associated realized and unrealized gains and losses on these investments are deferred as a regulatory asset or liability. Duke Energy classifies the majority of investments in debt and equity securities as long term, unless otherwise noted. Investment Trusts The investments within the Investment Trusts are managed by independent investment managers with discretion to buy, sell and invest pursuant to the objectives set forth by the investment manager agreements and trust agreements. The Duke Energy Registrants have limited oversight of the day-to-day management of these investments. As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate. Other AFS Securities Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings. There were no material credit losses as of December 31, 2022, and 2021. Other Investments amounts are recorded in Other within Other Noncurrent Assets on the Consolidated Balance Sheets. DUKE ENERGY The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 215 $ — $ — $ 160 Equity securities 3,658 105 5,871 4,905 43 7,350 Corporate debt securities 1 85 641 39 6 829 Municipal bonds — 39 330 14 1 314 U.S. government bonds 2 112 1,423 31 12 1,568 Other debt securities — 18 156 3 1 180 Total NDTF Investments $ 3,661 $ 359 $ 8,636 $ 4,992 $ 63 $ 10,401 Other Investments Cash and cash equivalents $ — $ — $ 22 $ — $ — $ 36 Equity securities 21 16 128 36 — 156 Corporate debt securities — 12 84 2 1 119 Municipal bonds — 3 78 3 1 80 U.S. government bonds — 2 62 — — 56 Other debt securities — 3 41 — 1 45 Total Other Investments $ 21 $ 36 $ 415 $ 41 $ 3 $ 492 Total Investments $ 3,682 $ 395 $ 9,051 $ 5,033 $ 66 $ 10,893 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 201 $ 724 $ 366 Realized losses 316 141 174 AFS: Realized gains 28 56 96 Realized losses 151 54 51 DUKE ENERGY CAROLINAS The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 117 $ — $ — $ 53 Equity securities 2,147 51 3,367 2,887 19 4,265 Corporate debt securities 1 62 401 24 4 506 Municipal bonds — 10 64 2 — 48 U.S. government bonds 1 51 685 16 3 712 Other debt securities — 18 148 3 1 175 Total NDTF Investments $ 2,149 $ 192 $ 4,782 $ 2,932 $ 27 $ 5,759 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 124 $ 440 $ 64 Realized losses 177 96 99 AFS: Realized gains 22 38 60 Realized losses 86 37 37 PROGRESS ENERGY The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 98 $ — $ — $ 107 Equity securities 1,511 54 2,504 2,018 24 3,085 Corporate debt securities — 23 240 15 2 323 Municipal bonds — 29 266 12 1 266 U.S. government bonds 1 61 738 15 9 856 Other debt securities — — 8 — — 5 Total NDTF Investments $ 1,512 $ 167 $ 3,854 $ 2,060 $ 36 $ 4,642 Other Investments Cash and cash equivalents $ — $ — $ 11 $ — $ — $ 20 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 36 $ 2 $ — $ 46 Total Investments $ 1,512 $ 167 $ 3,890 $ 2,062 $ 36 $ 4,688 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 77 $ 284 $ 302 Realized losses 139 45 75 AFS: Realized gains 6 16 24 Realized losses 48 14 13 DUKE ENERGY PROGRESS The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 56 $ — $ — $ 94 Equity securities 1,431 54 2,411 1,915 23 2,970 Corporate debt securities — 22 230 15 2 282 Municipal bonds — 29 266 12 1 266 U.S. government bonds 1 37 460 15 3 472 Other debt securities — — 7 — — 5 Total NDTF Investments $ 1,432 $ 142 $ 3,430 $ 1,957 $ 29 $ 4,089 Other Investments Cash and cash equivalents $ — $ — $ 9 $ — $ — $ 16 Total Other Investments $ — $ — $ 9 $ — $ — $ 16 Total Investments $ 1,432 $ 142 $ 3,439 $ 1,957 $ 29 $ 4,105 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 76 $ 283 $ 52 Realized losses 136 44 59 AFS: Realized gains 6 15 24 Realized losses 44 13 13 DUKE ENERGY FLORIDA The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 42 $ — $ — $ 13 Equity securities 80 — 93 103 1 115 Corporate debt securities — 1 10 — — 41 U.S. government bonds — 24 278 — 6 384 Other debt securities — — 1 — — — Total NDTF Investments (a) $ 80 $ 25 $ 424 $ 103 $ 7 $ 553 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 3 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 26 $ 2 $ — $ 29 Total Investments $ 80 $ 25 $ 450 $ 105 $ 7 $ 582 (a) During the years ended December 31, 2022, and 2021, Duke Energy Florida continued to receive reimbursements from the NDTF for costs related to ongoing decommissioning activity of the Crystal River Unit 3. Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 1 $ 1 $ 250 Realized losses 3 1 16 AFS: Realized gains — 1 — Realized losses 4 1 — DUKE ENERGY INDIANA The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ — Equity securities 2 16 79 6 — 97 Corporate debt securities — 1 8 — — 6 Municipal bonds — 3 45 1 1 46 U.S. government bonds — — 7 — — 12 Total Investments $ 2 $ 20 $ 140 $ 7 $ 1 $ 161 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were immaterial. DEBT SECURITY MATURITIES The table below summarizes the maturity date for debt securities. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 137 $ 7 $ 89 $ 24 $ 65 $ 8 Due after one through five years 807 287 443 244 199 22 Due after five through 10 years 469 230 193 178 15 6 Due after 10 years 1,402 774 552 517 35 24 Total $ 2,815 $ 1,298 $ 1,277 $ 963 $ 314 $ 60

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Fair value is the exchange price to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. The fair value definition focuses on an exit price versus the acquisition cost. Fair value measurements use market data or assumptions market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs may be readily observable, corroborated by market data, or generally unobservable. Valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs. A midmarket pricing convention (the midpoint price between bid and ask prices) is permitted for use as a practical expedient. Fair value measurements are classified in three levels based on the fair value hierarchy as defined by GAAP. Certain investments are not categorized within the fair value hierarchy. These investments are measured at fair value using the net asset value per share practical expedient. The net asset value is derived based on the investment cost, less any impairment, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer. Fair value accounting guidance permits entities to elect to measure certain financial instruments that are not required to be accounted for at fair value, such as equity method investments or the company’s own debt, at fair value. The Duke Energy Registrants have not elected to record any of these items at fair value. Valuation methods of the primary fair value measurements disclosed below are as follows. Investments in equity securities The majority of investments in equity securities are valued using Level 1 measurements. Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the quarter. Principal active markets for equity prices include published exchanges such as the NYSE and Nasdaq Stock Market. Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. There was no after-hours market activity that was required to be reflected in the reported fair value measurements. Investments in debt securities Most investments in debt securities are valued using Level 2 measurements because the valuations use interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. If the market for a particular fixed-income security is relatively inactive or illiquid, the measurement is Level 3. Commodity derivatives Commodity derivatives with clearinghouses are classified as Level 1. Commodity derivatives with observable forward curves are classified as Level 2. If forward price curves are not observable for the full term of the contract and the unobservable period had more than an insignificant impact on the valuation, the commodity derivative is classified as Level 3. In isolation, increases (decreases) in natural gas forward prices result in favorable (unfavorable) fair value adjustments for natural gas purchase contracts; and increases (decreases) in electricity forward prices result in unfavorable (favorable) fair value adjustments for electricity sales contracts. Duke Energy regularly evaluates and validates pricing inputs used to estimate the fair value of natural gas commodity contracts by a market participant price verification procedure. This procedure provides a comparison of internal forward commodity curves to market participant generated curves. Interest rate derivatives Most over-the-counter interest rate contract derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward interest rate curves, notional amounts, interest rates and credit quality of the counterparties. Derivatives related to interest rate risk for the Commercial Renewables Disposal Groups are included in the following disclosures. See Note 2 for further information. Other fair value considerations See Note 2 for further information on the valuation of the Commercial Renewables Disposal Groups. See Note 12 for a discussion of the valuation of goodwill and intangible assets. DUKE ENERGY The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 15. See Note 16 for additional information related to investments by major security type for the Duke Energy Registrants. December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 215 $ 215 $ — $ — $ — NDTF equity securities 5,871 5,829 — — 42 NDTF debt securities 2,550 780 1,770 — — Other equity securities 128 128 — — — Other debt securities 265 55 210 — — Other cash and cash equivalents 22 22 — — — Derivative assets 836 1 801 34 — Total assets 9,887 7,030 2,781 34 42 Derivative liabilities (437) (16) (421) — — Net assets (liabilities) $ 9,450 $ 7,014 $ 2,360 $ 34 $ 42 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 160 $ 160 $ — $ — $ — NDTF equity securities 7,350 7,300 — — 50 NDTF debt securities 2,891 967 1,924 — — Other equity securities 156 156 — — — Other debt securities 300 45 255 — — Other cash and cash equivalents 36 36 — — — Derivative assets 320 3 293 24 — Total assets 11,213 8,667 2,472 24 50 Derivative liabilities (327) (13) (314) — — Net assets (liabilities) $ 10,886 $ 8,654 $ 2,158 $ 24 $ 50 The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Years Ended December 31, (in millions) 2022 2021 Balance at beginning of period $ 24 $ 8 Purchases, sales, issuances and settlements: Purchases 78 21 Settlements (36) (20) Total gains (losses) included on the Consolidated Balance Sheet (32) 15 Balance at end of period $ 34 $ 24 DUKE ENERGY CAROLINAS The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 117 $ 117 $ — $ — NDTF equity securities 3,367 3,325 — 42 NDTF debt securities 1,298 323 975 — Derivative assets 330 — 330 — Total assets 5,112 3,765 1,305 42 Derivative liabilities (127) — (127) — Net assets $ 4,985 $ 3,765 $ 1,178 $ 42 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 53 $ 53 $ — $ — NDTF equity securities 4,265 4,215 — 50 NDTF debt securities 1,441 339 1,102 — Derivative assets 162 — 162 — Total assets 5,921 4,607 1,264 50 Derivative liabilities (35) — (35) — Net assets $ 5,886 $ 4,607 $ 1,229 $ 50 PROGRESS ENERGY The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 98 $ 98 $ — $ 107 $ 107 $ — NDTF equity securities 2,504 2,504 — 3,085 3,085 — NDTF debt securities 1,252 457 795 1,450 628 822 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 11 11 — 20 20 — Derivative assets 248 — 248 124 — 124 Total assets 4,138 3,070 1,068 4,812 3,840 972 Derivative liabilities (66) — (66) (24) — (24) Net assets $ 4,072 $ 3,070 $ 1,002 $ 4,788 $ 3,840 $ 948 DUKE ENERGY PROGRESS The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 56 $ 56 $ — $ 94 $ 94 $ — NDTF equity securities 2,411 2,411 — 2,970 2,970 — NDTF debt securities 963 225 738 1,025 289 736 Other cash and cash equivalents 9 9 — 16 16 — Derivative assets 230 — 230 124 — 124 Total assets 3,669 2,701 968 4,229 3,369 860 Derivative liabilities (48) — (48) (10) — (10) Net assets $ 3,621 $ 2,701 $ 920 $ 4,219 $ 3,369 $ 850 DUKE ENERGY FLORIDA The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 42 $ 42 $ — $ 13 $ 13 $ — NDTF equity securities 93 93 — 115 115 — NDTF debt securities 289 232 57 425 339 86 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 1 1 — 3 3 — Derivative assets 17 — 17 — — — Total assets 467 368 99 582 470 112 Derivative liabilities (19) — (19) (14) — (14) Net assets $ 448 $ 368 $ 80 $ 568 $ 470 $ 98 DUKE ENERGY OHIO The recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets were not material at December 31, 2022, and 2021. DUKE ENERGY INDIANA The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 79 $ 79 $ — $ — $ 97 $ 97 $ — $ — Other debt securities 60 — 60 — 64 — 64 — Other cash equivalents 1 1 — — — — — — Derivative assets 110 — 81 29 23 1 — 22 Total assets 250 80 141 29 184 98 64 22 Derivative liabilities (16) (16) — — (27) (13) (14) — Net assets $ 234 $ 64 $ 141 $ 29 $ 157 $ 85 $ 50 $ 22 The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Years Ended December 31, (in millions) 2022 2021 Balance at beginning of period $ 22 $ 6 Purchases, sales, issuances and settlements: Purchases 74 18 Settlements (32) (16) Total (losses) gains included on the Consolidated Balance Sheet (35) 14 Balance at end of period $ 29 $ 22 PIEDMONT The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ — $ — $ — $ 3 $ 3 $ — Derivative liabilities (168) — (168) (139) — (139) Net (liabilities) assets $ (168) $ — $ (168) $ (136) $ 3 $ (139) QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. December 31, 2022 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 5 RTO auction pricing FTR price – per MWh $ 0.89 – $ 6.25 $ 3.35 Duke Energy Indiana FTRs 29 RTO auction pricing FTR price – per MWh 0.09 – 21.79 2.74 Duke Energy Total Level 3 derivatives $ 34 December 31, 2021 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 2 RTO auction pricing FTR price – per MWh $ 0.06 – $ 1.79 $ 0.96 Duke Energy Indiana FTRs 22 RTO auction pricing FTR price – per MWh (1.18) – 13.11 2.68 Duke Energy Total Level 3 derivatives $ 24 OTHER FAIR VALUE DISCLOSURES The fair value and book value of long-term debt, including current maturities, is summarized in the following table. The following disclosures include debt attributable to the Commercial Renewables Disposal Groups. See Note 2 for further details. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements. December 31, 2022 December 31, 2021 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 71,215 $ 63,454 $ 63,835 $ 69,683 Duke Energy Carolinas 14,266 12,943 13,275 15,101 Progress Energy 22,439 20,467 20,823 23,751 Duke Energy Progress 11,087 9,689 10,249 11,252 Duke Energy Florida 9,709 8,991 8,482 9,772 Duke Energy Ohio 3,245 2,927 3,193 3,570 Duke Energy Indiana 4,307 3,913 4,323 5,067 Piedmont 3,363 2,940 2,968 3,278 (a) Book value of long-term de bt includes $1.17 billion as of December 31, 2022, and $1.25 billion as of December 31, 2021, of unamortized debt discount and premium, net in purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt. At both December 31, 2022, and December 31, 2021, fair value of cash and cash equivalents, accounts and notes receivable, accounts payable, notes payable and commercial paper, and nonrecourse notes payable of VIEs are not materially different from their carrying amounts because of the short-term nature of these instruments and/or because the stated rates approximate market rates.

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2022
Variable Interest Entities [Abstract]
Variable Interest Entities	VARIABLE INTEREST ENTITIES A VIE is an entity that is evaluated for consolidation using more than a simple analysis of voting control. The analysis to determine whether an entity is a VIE considers contracts with an entity, credit support for an entity, the adequacy of the equity investment of an entity and the relationship of voting power to the amount of equity invested in an entity. This analysis is performed either upon the creation of a legal entity or upon the occurrence of an event requiring reevaluation, such as a significant change in an entity’s assets or activities. A qualitative analysis of control determines the party that consolidates a VIE. This assessment is based on (i) what party has the power to direct the activities of the VIE that most significantly impact its economic performance and (ii) what party has rights to receive benefits or is obligated to absorb losses that could potentially be significant to the VIE. The analysis of the party that consolidates a VIE is a continual reassessment. CONSOLIDATED VIEs The obligations of the consolidated VIEs discussed in the following paragraphs are nonrecourse to the Duke Energy Registrants. The registrants have no requirement to provide liquidity to, purchase assets of or guarantee performance of these VIEs unless noted in the following paragraphs. No financial support was provided to any of the consolidated VIEs during the years ended December 31, 2022, 2021 and 2020, or is expected to be provided in the future, that was not previously contractually required. Receivables Financing – DERF/DEPR/DEFR DERF, DEPR and DEFR are bankruptcy remote, special purpose subsidiaries of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively. DERF, DEPR and DEFR are wholly owned LLCs with separate legal existence from their parent companies, and their assets are not generally available to creditors of their parent companies. On a revolving basis, DERF, DEPR and DEFR buy certain accounts receivable arising from the sale of electricity and related services from their parent companies. DERF, DEPR and DEFR borrow amounts under credit facilities to buy these receivables. Borrowing availability from the credit facilities is limited to the amount of qualified receivables purchased, which generally exclude receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligations is cash collections from the receivables. Amounts borrowed under the credit facilities are reflected on the Consolidated Balance Sheets as Long-Term Debt. The most significant activity that impacts the economic performance of DERF, DEPR and DEFR are the decisions made to manage delinquent receivables. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are considered the primary beneficiaries and consolidate DERF, DEPR and DEFR, respectively, as they make those decisions. Receivables Financing – CRC CRC is a bankruptcy remote, special purpose entity indirectly owned by Duke Energy. On a revolving basis, CRC buys certain accounts receivable arising from the sale of electricity, natural gas and related services from Duke Energy Ohio and Duke Energy Indiana. CRC borrows amounts under a credit facility to buy the receivables from Duke Energy Ohio and Duke Energy Indiana. Borrowing availability from the credit facility is limited to the amount of qualified receivables sold to CRC, which generally exclude receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligation is cash collections from the receivables. Amounts borrowed under the credit facility are reflected on Duke Energy's Consolidated Balance Sheets as Long-Term Debt. The proceeds Duke Energy Ohio and Duke Energy Indiana receive from the sale of receivables to CRC are approximately 75% cash and 25% in the form of a subordinated note from CRC. The subordinated note is a retained interest in the receivables sold. Depending on collection experience, additional equity infusions to CRC may be required by Duke Energy to maintain a minimum equity balance of $3 million. CRC is considered a VIE because (i) equity capitalization is insufficient to support its operations, (ii) power to direct the activities that most significantly impact the economic performance of the entity is not held by the equity holder and (iii) deficiencies in net worth of CRC are funded by Duke Energy. The most significant activities that impact the economic performance of CRC are decisions made to manage delinquent receivables. Duke Energy is considered the primary beneficiary and consolidates CRC as it makes these decisions. Neither Duke Energy Ohio nor Duke Energy Indiana consolidate CRC. Receivables Financing – Credit Facilities The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above. Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Florida (in millions) CRC DERF DEPR DEFR Expiration date February 2025 January 2025 April 2025 April 2023 Credit facility amount $ 350 $ 500 $ 400 $ 250 Amounts borrowed at December 31, 2022 350 471 400 250 Amounts borrowed at December 31, 2021 350 475 350 250 Restricted Receivables at December 31, 2022 917 928 793 490 Restricted Receivables at December 31, 2021 587 844 574 427 Nuclear Asset-Recovery Bonds – Duke Energy Florida Project Finance, LLC (DEFPF) DEFPF is a bankruptcy remote, wholly owned special purpose subsidiary of Duke Energy Florida. DEFPF was formed in 2016 for the sole purpose of issuing nuclear asset-recovery bonds to finance Duke Energy Florida's unrecovered regulatory asset related to Crystal River Unit 3. In 2016, DEFPF issued senior secured bonds and used the proceeds to acquire nuclear asset-recovery property from Duke Energy Florida. The nuclear asset-recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable nuclear asset-recovery charge from all Duke Energy Florida retail customers until the bonds are paid in full and all financing costs have been recovered. The nuclear asset-recovery bonds are secured by the nuclear asset-recovery property and cash collections from the nuclear asset-recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Florida. DEFPF is considered a VIE primarily because the equity capitalization is insufficient to support its operations. Duke Energy Florida has the power to direct the significant activities of the VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates DEFPF. The following table summarizes the impact of DEFPF on Duke Energy Florida's Consolidated Balance Sheets. December 31, (in millions) 2022 2021 Receivables of VIEs $ 6 $ 5 Regulatory Assets: Current 55 54 Current Assets: Other 41 39 Other Noncurrent Assets: Regulatory assets 826 883 Current Liabilities: Other 9 9 Current maturities of long-term debt 56 56 Long-Term Debt 890 946 Storm Recovery Bonds – Duke Energy Carolinas NC Storm Funding and Duke Energy Progress NC Storm Funding Duke Energy Carolinas NC Storm Funding, LLC. (DECNCSF) and Duke Energy Progress NC Storm Funding, LLC. (DEPNCSF) are bankruptcy remote, wholly owned special purpose subsidiaries of Duke Energy Carolinas and Duke Energy Progress, respectively. These entities were formed in 2021 for the sole purpose of issuing storm recovery bonds to finance certain of Duke Energy Carolinas’ and Duke Energy Progress’ unrecovered regulatory assets related to storm costs. In November 2021, DECNCSF and DEPNCSF issued $237 million and $770 million of senior secured bonds, respectively and used the proceeds to acquire storm recovery property from Duke Energy Carolinas and Duke Energy Progress. The storm recovery property was created by state legislation and NCUC financing orders for the purpose of financing storm costs incurred in 2018 and 2019. The storm recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable charge from all Duke Energy Carolinas’ and Duke Energy Progress’ retail customers until the bonds are paid in full and all financing costs have been recovered. The storm recovery bonds are secured by the storm recovery property and cash collections from the storm recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Carolinas or Duke Energy Progress. For additional information, see Notes 4 and 7. DECNCSF and DEPNCSF are considered VIEs primarily because the equity capitalization is insufficient to support their operations. Duke Energy Carolinas and Duke Energy Progress have the power to direct the significant activities of the VIEs as described above and therefore Duke Energy Carolinas and Duke Energy Progress are considered the primary beneficiaries and consolidate DECNCSF and DEPNCSF, respectively. The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. Duke Energy Carolinas Duke Energy Progress December 31, December 31, (in millions) 2022 2021 2022 2021 Regulatory Assets: Current $ 12 $ 12 $ 39 $ 39 Current Assets: Other 8 — 29 — Other Noncurrent Assets: Regulatory assets 208 220 681 720 Other Noncurrent Assets: Other 1 1 2 4 Current maturities of long-term debt 10 5 34 15 Current Liabilities: Other 3 1 8 2 Long-Term Debt 219 228 714 747 NON-CONSOLIDATED VIEs The following tables summarize the impact of non-consolidated VIEs on the Consolidated Balance Sheets. December 31, 2022 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 198 $ 317 Investments in equity method unconsolidated affiliates 43 — — Other noncurrent assets 45 — — Total assets $ 88 $ 198 $ 317 Other current liabilities 59 — — Other noncurrent liabilities 47 — — Total liabilities $ 106 $ — $ — Net (liabilities) assets $ (18) $ 198 $ 317 December 31, 2021 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 79 $ 97 Investments in equity method unconsolidated affiliates 15 — — Other noncurrent assets 61 — — Total assets $ 76 $ 79 $ 97 Other current liabilities 47 — — Other noncurrent liabilities 54 — — Total liabilities $ 101 $ — $ — Net (liabilities) assets $ (25) $ 79 $ 97 The Duke Energy Registrants are not aware of any situations where the maximum exposure to loss significantly exceeds the carrying values shown above. Natural Gas Investments Duke Energy has investments in various joint ventures including pipeline and renewable natural gas projects. These entities are considered VIEs due to having insufficient equity to finance their own activities without subordinated financial support. Duke Energy does not have the power to direct the activities that most significantly impact the economic performance, the obligation to absorb losses or the right to receive benefits of these VIEs and therefore does not consolidate these entities. Duke Energy has a 47% ownership interest in ACP. In 2020, Duke Energy determined that it would no longer invest in the construction of the ACP pipeline. In February 2021, Duke Energy paid approximately $855 million to fund ACP's outstanding debt, relieving Duke Energy of its guarantee. See Notes 4, 8 and 13 for further information regarding this transaction. CRC See discussion under Consolidated VIEs for additional information related to CRC. Amounts included in Receivables from affiliated companies in the above table for Duke Energy Ohio and Duke Energy Indiana reflect their retained interest in receivables sold to CRC. These subordinated notes held by Duke Energy Ohio and Duke Energy Indiana are stated at fair value. Carrying values of retained interests are determined by allocating carrying value of the receivables between assets sold and interests retained based on relative fair value. The allocated bases of the subordinated notes are not materially different than their face value because (i) the receivables generally turnover in less than two months, (ii) credit losses are reasonably predictable due to the broad customer base and lack of significant concentration and (iii) the equity in CRC is subordinate to all retained interests and thus would absorb losses first. The hypothetical effect on fair value of the retained interests assuming both a 10% and a 20% unfavorable variation in credit losses or discount rates is not material due to the short turnover of receivables and historically low credit loss history. Interest accrues to Duke Energy Ohio and Duke Energy Indiana on the retained interests using the acceptable yield method. This method generally approximates the stated rate on the notes since the allocated basis and the face value are nearly equivalent. An impairment charge is recorded against the carrying value of both retained interests and purchased beneficial interest whenever it is determined that an other-than-temporary impairment has occurred. Key assumptions used in estimating fair value are detailed in the following table. Duke Energy Ohio Duke Energy Indiana 2022 2021 2022 2021 Anticipated credit loss ratio 0.5 % 0.5 % 0.3 % 0.3 % Discount rate 2.7 % 1.1 % 2.7 % 1.1 % Receivable turnover rate 13.5 % 13.5 % 11.3 % 11.3 % The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana December 31, December 31, (in millions) 2022 2021 2022 2021 Receivables sold $ 423 $ 269 $ 508 $ 328 Less: Retained interests 198 79 317 97 Net receivables sold $ 225 $ 190 $ 191 $ 231 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Years Ended December 31, Years Ended December 31, (in millions) 2022 2021 2020 2022 2021 2020 Sales Receivables sold $ 2,562 $ 2,023 $ 1,905 $ 3,744 $ 2,909 $ 2,631 Loss recognized on sale 18 10 10 26 13 12 Cash flows Cash proceeds from receivables sold 2,424 2,018 1,875 3,498 2,909 2,586 Collection fees received 1 1 1 2 1 1 Return received on retained interests 10 4 4 15 6 5 Cash flows from sales of receivables are reflected within Cash Flows From Operating Activities and Cash Flows from Investing Activities on Duke Energy Ohio’s and Duke Energy Indiana’s Consolidated Statements of Cash Flows. Collection fees received in connection with servicing transferred accounts receivable are included in Operation, maintenance and other on Duke Energy Ohio’s and Duke Energy Indiana’s Consolidated Statements of Operations and Comprehensive Income. The loss recognized on sales of receivables is calculated monthly by multiplying receivables sold during the month by the required discount. The required discount is derived monthly utilizing a three-year weighted average formula that considers charge-off history, late charge history and turnover history on the sold receivables, as well as a component for the time value of money. The discount rate, or component for the time value of money, is the prior month-end Daily Simple SOFR plus a fixed rate of 1%.

Revenue

Revenue	12 Months Ended
	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue	REVENUEDuke Energy recognizes revenue consistent with amounts billed under tariff offerings or at contractually agreed upon rates based on actual physical delivery of electric or natural gas service, including estimated volumes delivered when billings have not yet occurred. As such, the majority of Duke Energy’s revenues have fixed pricing based on the contractual terms of the published tariffs, with variability in expected cash flows attributable to the customer’s volumetric demand and ultimate quantities of energy or natural gas supplied and used during the billing period. The stand-alone selling price of related sales are designed to support recovery of prudently incurred costs and an appropriate return on invested assets and are primarily governed by published tariff rates or contractual agreements approved by relevant regulatory bodies. As described in Note 1, certain excise taxes and franchise fees levied by state or local governments are required to be paid even if not collected from the customer. These taxes are recognized on a gross basis as part of revenues. Duke Energy elects to account for all other taxes net of revenues. Performance obligations are satisfied over time as energy or natural gas is delivered and consumed with billings generally occurring monthly and related payments due within 30 days, depending on regulatory requirements. In no event does the timing between payment and delivery of the goods and services exceed one year. Using this output method for revenue recognition provides a faithful depiction of the transfer of electric and natural gas service as customers obtain control of the commodity and benefit from its use at delivery. Additionally, Duke Energy has an enforceable right to consideration for energy or natural gas delivered at any discrete point in time and will recognize revenue at an amount that reflects the consideration to which Duke Energy is entitled for the energy or natural gas delivered. As described above, the majority of Duke Energy’s tariff revenues are at-will and, as such, related contracts with customers have an expected duration of one year or less and will not have future performance obligations for disclosure. Additionally, other long-term revenue streams, including wholesale contracts, generally provide services that are part of a single performance obligation, the delivery of electricity or natural gas. As such, other than material fixed consideration under long-term contracts, related disclosures for future performance obligations are also not applicable. Duke Energy earns substantially all of its revenues through its reportable segments, EU&I and GU&I. Electric Utilities and Infrastructure EU&I earns the majority of its revenues through retail and wholesale electric service through the generation, transmission, distribution and sale of electricity. Duke Energy generally provides retail and wholesale electric service customers with their full electric load requirements or with supplemental load requirements when the customer has other sources of electricity. Retail electric service is generally marketed throughout Duke Energy's electric service territory through standard service offers. The standard service offers are through tariffs determined by regulators in Duke Energy's regulated service territory. Each tariff, which is assigned to customers based on customer class, has multiple components such as an energy charge, a demand charge, a basic facilities charge and applicable riders. Duke Energy considers each of these components to be aggregated into a single performance obligation for providing electric service, or in the case of distribution only customers in Duke Energy Ohio, for delivering electricity. Electricity is considered a single performance obligation satisfied over time consistent with the series guidance and is provided and consumed over the billing period, generally one month. Retail electric service is typically provided to at-will customers who can cancel service at any time, without a substantive penalty. Additionally, Duke Energy adheres to applicable regulatory requirements in each jurisdiction to ensure the collectability of amounts billed and appropriate mitigating procedures are followed when necessary. As such, revenue from contracts with customers for such contracts is equivalent to the electricity supplied and billed in that period (including unbilled estimates). Wholesale electric service is generally provided under long-term contracts using cost-based pricing. FERC regulates costs that may be recovered from customers and the amount of return companies are permitted to earn. Wholesale contracts include both energy and demand charges. For full requirements contracts, Duke Energy considers both charges as a single performance obligation for providing integrated electric service. For contracts where energy and demand charges are considered separate performance obligations, energy and demand are each a distinct performance obligation under the series guidance and are satisfied as energy is delivered and stand-ready service is provided on a monthly basis. This service represents consumption over the billing period and revenue is recognized consistent with billings and unbilled estimates, which generally occur monthly. Contractual amounts owed are typically trued up annually based upon incurred costs in accordance with FERC published filings and the specific customer’s actual peak demand. Estimates of variable consideration related to potential additional billings or refunds owed are updated quarterly. The majority of wholesale revenues are full requirements contracts where the customers purchase the substantial majority of their energy needs and do not have a fixed quantity of contractually required energy or capacity. As such, related forecasted revenues are considered optional purchases. Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations: Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Progress Energy $ 61 $ 66 $ 7 $ 7 $ 7 $ 36 $ 184 Duke Energy Progress 8 8 — — — — 16 Duke Energy Florida 53 58 7 7 7 36 168 Duke Energy Indiana 11 16 17 15 7 5 71 Revenues for block sales are recognized monthly as energy is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Gas Utilities and Infrastructure GU&I earns its revenue through retail and wholesale natural gas service through the transportation, distribution and sale of natural gas. Duke Energy generally provides retail and wholesale natural gas service customers with all natural gas load requirements. Additionally, while natural gas can be stored, substantially all natural gas provided by Duke Energy is consumed by customers simultaneously with receipt of delivery. Retail natural gas service is marketed throughout Duke Energy's natural gas service territory using published tariff rates. The tariff rates are established by regulators in Duke Energy's service territories. Each tariff, which is assigned to customers based on customer class, have multiple components, such as a commodity charge, demand charge, customer or monthly charge and transportation costs. Duke Energy considers each of these components to be aggregated into a single performance obligation for providing natural gas service. For contracts where Duke Energy provides all of the customer’s natural gas needs, the delivery of natural gas is considered a single performance obligation satisfied over time, and revenue is recognized monthly based on billings and unbilled estimates as service is provided and the commodity is consumed over the billing period. Additionally, natural gas service is typically at-will and customers can cancel service at any time, without a substantive penalty. Duke Energy also adheres to applicable regulatory requirements to ensure the collectability of amounts billed and receivable and appropriate mitigating procedures are followed when necessary. Certain long-term individually negotiated contracts exist to provide natural gas service. These contracts are regulated and approved by state commissions. The negotiated contracts have multiple components, including a natural gas and a demand charge, similar to retail natural gas contracts. Duke Energy considers each of these components to be a single performance obligation for providing natural gas service. This service represents consumption over the billing period, generally one month. Fixed capacity payments under long-term contracts for the GU&I segment include minimum margin contracts and supply arrangements with municipalities and power generation facilities. Revenues for related sales are recognized monthly as natural gas is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Estimated remaining performance obligations are as follows: Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Piedmont $ 68 $ 62 $ 61 $ 51 $ 49 $ 241 $ 532 Other The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers. Disaggregated Revenues For the EU&I and GU&I segments, revenue by customer class is most meaningful to Duke Energy as each respective customer class collectively represents unique customer expectations of service, generally has different energy and demand requirements, and operates under tailored, regulatory approved pricing structures. Additionally, each customer class is impacted differently by weather and a variety of economic factors including the level of population growth, economic investment, employment levels, and regulatory activities in each of Duke Energy’s jurisdictions. As such, analyzing revenues disaggregated by customer class allows Duke Energy to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Disaggregated revenues are presented as follows: Year Ended December 31, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 11,377 $ 3,275 $ 5,812 $ 2,378 $ 3,434 $ 862 $ 1,430 $ — General 7,356 2,396 3,396 1,480 1,916 517 1,049 — Industrial 3,504 1,251 1,095 770 325 202 956 — Wholesale 2,856 561 1,785 1,346 439 127 383 — Other revenues 795 372 994 768 226 61 19 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 25,888 $ 7,855 $ 13,082 $ 6,742 $ 6,340 $ 1,769 $ 3,837 $ — Gas Utilities and Infrastructure Residential $ 1,462 $ — $ — $ — $ — $ 488 $ — $ 974 Commercial 765 — — — — 180 — 585 Industrial 170 — — — — 24 — 144 Power Generation — — — — — — — 94 Other revenues 360 — — — — 25 — 271 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 2,757 $ — $ — $ — $ — $ 717 $ — $ 2,068 Other Revenue from contracts with customers $ 30 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 28,675 $ 7,855 $ 13,082 $ 6,742 $ 6,340 $ 2,486 $ 3,837 $ 2,068 Other revenue sources (a) $ 93 $ 2 $ 43 $ 11 $ 13 $ 28 $ 85 $ 56 Total revenues $ 28,768 $ 7,857 $ 13,125 $ 6,753 $ 6,353 $ 2,514 $ 3,922 $ 2,124 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Year Ended December 31, 2021 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 10,097 $ 3,054 $ 5,084 $ 2,156 $ 2,928 $ 767 $ 1,188 $ — General 6,375 2,210 2,883 1,378 1,505 440 825 — Industrial 2,924 1,145 894 634 260 135 750 — Wholesale 2,199 472 1,385 1,164 221 56 285 — Other revenues 879 264 716 387 329 83 86 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 22,474 $ 7,145 $ 10,962 $ 5,719 $ 5,243 $ 1,481 $ 3,134 $ — Gas Utilities and Infrastructure Residential $ 1,131 $ — $ — $ — $ — $ 354 $ — $ 777 Commercial 561 — — — — 143 — 418 Industrial 158 — — — — 20 — 137 Power Generation — — — — — — — 92 Other revenues 133 — — — — 28 — 45 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,983 $ — $ — $ — $ — $ 545 $ — $ 1,469 Other Revenue from contracts with customers $ 29 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 24,486 $ 7,145 $ 10,962 $ 5,719 $ 5,243 $ 2,026 $ 3,134 $ 1,469 Other revenue sources (a) $ 135 $ (43) $ 95 $ 61 $ 16 $ 11 $ 40 $ 100 Total revenues $ 24,621 $ 7,102 $ 11,057 $ 5,780 $ 5,259 $ 2,037 $ 3,174 $ 1,569 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Year Ended December 31, 2020 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 9,806 $ 2,997 $ 5,017 $ 2,059 $ 2,958 $ 726 $ 1,064 $ — General 6,194 2,233 2,779 1,312 1,467 442 740 — Industrial 2,859 1,137 901 649 252 137 683 — Wholesale 1,864 380 1,228 1,034 194 32 224 — Other revenues 914 281 596 294 302 82 72 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 21,637 $ 7,028 $ 10,521 $ 5,348 $ 5,173 $ 1,419 $ 2,783 $ — Gas Utilities and Infrastructure Residential $ 930 $ — $ — $ — $ — $ 300 $ — $ 630 Commercial 446 — — — — 117 — 329 Industrial 127 — — — — 17 — 110 Power Generation — — — — — — — 34 Other revenues 87 — — — — 17 — 70 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,590 $ — $ — $ — $ — $ 451 $ — $ 1,173 Other Revenue from contracts with customers $ 26 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 23,253 $ 7,028 $ 10,521 $ 5,348 $ 5,173 $ 1,870 $ 2,783 $ 1,173 Other revenue sources (a) $ 113 $ (13) $ 106 $ 74 $ 15 $ (12) $ 12 $ 124 Total revenues $ 23,366 $ 7,015 $ 10,627 $ 5,422 $ 5,188 $ 1,858 $ 2,795 $ 1,297 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. As described in Note 1, Duke Energy adopted the new guidance for credit losses effective January 1, 2020, using the modified retrospective method of adoption, which does not require restatement of prior year reported results. The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2019 $ 76 $ 10 $ 16 $ 8 $ 7 $ 4 $ 3 $ 6 Cumulative Change in Accounting Principle 5 1 2 1 1 — — 1 Write-Offs (58) (13) (23) (8) (14) — — (6) Credit Loss Expense 75 13 29 9 20 — — 11 Other Adjustments 48 12 13 13 — — — — Balance at December 31, 2020 $ 146 $ 23 $ 37 $ 23 $ 14 $ 4 $ 3 $ 12 Write-Offs (58) (21) (25) (12) (13) — — (9) Credit Loss Expense 53 27 25 11 14 — — 7 Other Adjustments (20) 13 (1) (1) 1 — — 5 Balance at December 31, 2021 $ 121 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (158) (73) (70) (36) (34) — — (12) Credit Loss Expense 160 40 72 17 55 2 1 11 Other Adjustments 93 59 43 42 (1) — — — Balance at December 31, 2022 $ 216 $ 68 $ 81 $ 44 $ 36 $ 6 $ 4 $ 14 Trade and other receivables are evaluated based on an estimate of the risk of loss over the life of the receivable and current and historical conditions using supportable assumptions. Management evaluates the risk of loss for trade and other receivables by comparing the historical write-off amounts to total revenue over a specified period. Historical loss rates are adjusted due to the impact of current conditions, as well as forecasted conditions over a reasonable time period. The calculated write-off rate can be applied to the receivable balance for which an established reserve does not already exist. Management reviews the assumptions and risk of loss periodically for trade and other receivables. The aging of trade receivables is presented in the table below. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Receivables (a)(b) $ 1,457 $ 486 $ 355 $ 232 $ 123 $ 20 $ 28 $ 160 Current 2,347 577 1,059 637 417 15 52 265 1-30 days past due 261 96 60 15 45 5 17 15 31-60 days past due 123 23 61 49 12 6 2 3 61-90 days past due 74 25 18 9 9 3 11 2 91+ days past due 209 70 74 27 47 26 6 4 Deferred Payment Arrangements (c) 160 57 62 35 27 4 — 1 Trade and Other Receivables $ 4,631 $ 1,334 $ 1,689 $ 1,004 $ 680 $ 79 $ 116 $ 450 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Receivables (a)(b) $ 922 $ 316 $ 266 $ 193 $ 73 $ 4 $ 27 $ 106 Current 1,941 592 716 405 311 42 50 202 1-30 days past due 288 77 128 44 82 4 5 12 31-60 days past due 98 30 49 21 28 1 10 2 61-90 days past due 118 32 48 28 20 23 5 4 91+ days past due 161 84 37 9 28 24 6 3 Deferred Payment Arrangements (c) 115 55 45 22 23 2 — 4 Trade and Other Receivables $ 3,643 $ 1,186 $ 1,289 $ 722 $ 565 $ 100 $ 103 $ 333 (a) Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Consolidated Balance Sheets. (b) Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 18 for further information. These receivables for unbilled revenues are $148 million and $260 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2022, and $82 million and $121 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2021. (c) Due to ongoing financial hardships impacting customers, Duke Energy has permitted customers to defer payment of past-due amounts through installment payment plans.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITYBasic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements, were exercised or settled. Duke Energy’s participating securities are RSUs that are entitled to dividends declared on Duke Energy common stock during the RSUs vesting periods. Dividends declared on preferred stock are recorded on the Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS. The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared. Years Ended December 31, (in millions, except per share amounts) 2022 2021 2020 Net Income available to Duke Energy common stockholders $ 2,444 $ 3,802 $ 1,270 Less: (Loss) Income from discontinued operations attributable to Duke Energy common stockholders (1,215) 200 289 Accumulated preferred stock dividends adjustment — — 1 Less: Impact of participating securities 2 3 2 Income from continuing operations available to Duke Energy common stockholders $ 3,657 $ 3,599 $ 980 Loss from discontinued operations, net of tax $ (1,323) $ (144) $ (7) Add: Loss attributable to NCI 108 344 296 (Loss) Income from discontinued operations attributable to Duke Energy common stockholders $ (1,215) $ 200 $ 289 Weighted average common shares outstanding – basic 770 769 737 Equity forwards — — 1 Weighted average common shares outstanding – diluted 770 769 738 EPS from continuing operations available to Duke Energy common stockholders Basic and Diluted $ 4.74 $ 4.68 $ 1.33 (Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and Diluted $ (1.57) $ 0.26 $ 0.39 Potentially dilutive items excluded from the calculation (a) 2 2 2 Dividends declared per common share $ 3.98 $ 3.90 $ 3.82 Dividends declared on Series A preferred stock per depositary share (b) $ 1.437 $ 1.437 $ 1.437 Dividends declared on Series B preferred stock per share (c) $ 48.750 $ 48.750 $ 49.292 (a) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (b) 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share. (c) 4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends are payable semiannually in arrears on the 16th day of March and September. The preferred stock has a $1,000 liquidation preference per share. On September 16, 2024, the First Call Date, and any fifth anniversary of the First Call Date, the dividend rate will reset based on the then current five-year U.S. Treasury rate plus a spread of 3.388%. Common Stock In November 2022, Duke Energy filed a prospectus supplement and executed an EDA under which it may sell up to $1.5 billion of its common stock through a new ATM offering program, including an equity forward sales component. Under the terms of the EDA, Duke Energy may issue and sell shares of common stock through September 2025. Preferred Stock The Series A Preferred Stock has no maturity or mandatory redemption date, is not redeemable at the option of the holders and includes separate call options. The first call option allows Duke Energy to call the Series A Preferred Stock at a redemption price of $25.50 per depositary share prior to June 15, 2024, in whole but not in part, at any time within 120 days after a ratings event where a rating agency amends, clarifies or changes the criteria it uses to assign equity credit for securities such as the preferred stock. The second call option allows Duke Energy to call the preferred stock, in whole or in part, at any time, on or after June 15, 2024, at a redemption price of $25 per depositary share. Duke Energy is also required to redeem all accumulated and unpaid dividends if either call option is exercised. The Series B Preferred Stock has no maturity or mandatory redemption date, is not redeemable at the option of the holders and includes separate call options. The first call option allows Duke Energy to call the Series B Preferred Stock at a redemption price of $1,020 per share, in whole but not in part, at any time within 120 days after a ratings event. The second call option allows Duke Energy to call the preferred stock, in whole or in part, on the First Call Date or any subsequent Reset Date at a redemption price in cash equal to $1,000 per share. Duke Energy is also required to redeem all accumulated and unpaid dividends if either call option is exercised. Dividends issued on its Series A and Series B Preferred Stock are subject to approval by the Board of Directors. However, the deferral of dividend payments on the preferred stock prohibits the declaration of common stock dividends. The Series A and Series B Preferred Stock rank, with respect to dividends and distributions upon liquidation or dissolution: • senior to Common Stock and to each other class or series of capital stock established after the original issue date of the Series A and Series B Preferred Stock that is expressly made subordinated to the Series A and Series B Preferred Stock; • on a parity with any class or series of capital stock established after the original issue date of the Series A and Series B Preferred Stock that is not expressly made senior or subordinated to the Series A or Series B Preferred Stock; • junior to any class or series of capital stock established after the original issue date of the Series A and Series B Preferred Stock that is expressly made senior to the Series A or Series B Preferred Stock; • junior to all existing and future indebtedness (including indebtedness outstanding under Duke Energy's credit facilities, unsecured senior notes, junior subordinated debentures and commercial paper) and other liabilities with respect to assets available to satisfy claims against Duke Energy; and • structurally subordinated to existing and future indebtedness and other liabilities of Duke Energy's subsidiaries and future preferred stock of subsidiaries. Holders of Series A and Series B Preferred Stock have no voting rights with respect to matters that generally require the approval of voting stockholders. The limited voting rights of holders of Series A and Series B Preferred Stock include the right to vote as a single class, respectively, on certain matters that may affect the preference or special rights of the preferred stock, except in the instance that Duke Energy elects to defer the payment of dividends for a total of six quarterly full dividend periods for Series A Preferred Stock or three semiannual full dividend periods for Series B Preferred Stock. If dividends are deferred for a cumulative total of six quarterly full dividend periods for Series A Preferred Stock or three semiannual full dividend periods for Series B Preferred Stock, whether or not for consecutive dividend periods, holders of the respective preferred stock have the right to elect two additional Board members to the Board of Directors.

Severance

Severance	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Severance	SEVERANCE During 2022, Duke Energy identified opportunities to eliminate work and create sustainable savings through a workload reduction initiative with a focus on process improvement through digital technology, governance simplification and elimination of low-value work. As a result, Duke Energy extended involuntary severance benefits to certain employees in specific areas as a part of this initiative. During 2021, Duke Energy reviewed its operations and identified opportunities for improvement to better serve its customers. This operational review included workforce realignment to ensure the company is staffed with the right skill sets and number of teammates to execute the long-term vision for Duke Energy. As such, Duke Energy extended involuntary severance benefits to certain employees in specific areas as a part of these workforce realignment efforts. During 2020, as a result of partial settlements between Duke Energy Carolinas, Duke Energy Progress and the Public Staff, Duke Energy Carolinas and Duke Energy Progress deferred as Regulatory assets on the Consolidated Balance Sheets, approximately $65 million and $33 million, respectively, of previously recorded severance charges within Operation, maintenance and other on the Consolidated Statements of Operations. These severance charges were previously recorded during 2018, as Duke Energy reviewed its operations and identified opportunities for improvement to better serve its customers. This operational review included the company's workforce strategy and staffing levels to ensure the company was staffed with the right skill sets and number of teammates to execute the long-term vision for Duke Energy. As such, Duke Energy extended voluntary and involuntary severance benefits to certain employees in specific areas as a part of workforce planning and digital transformation efforts. The following table presents the direct and allocated severance and related charges accrued for approximately 233 employees in 2022, 290 employees in 2021 and 30 e mployees in 2020, by the Duke Energy Registrants within Operation, maintenance and other on the Consolidated Statements of Operations. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Year Ended December 31, 2022 (a)(b) $ 65 $ 40 $ 20 $ 17 $ 3 $ 1 $ 2 $ 2 Year Ended December 31, 2021 (c)(d) 69 33 26 20 6 2 3 2 Year Ended December 31, 2020 (e)(f) (85) (58) (28) (31) 3 — — — (a) Includes amortization of deferred severance charges of approximately $33 million, $22 million, $11 million and $11 million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (b) Includes adjustments associated with 2021 severance charges of approximately $(19) million, $(6) million, $(8) million, $(4) million, $(4) million, $(1) million, $(2) million and $(1) million for Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont, respectively. (c) Includes amortization of deferred severance charges of approximately $33 million, $22 million, $11 million and $11 million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (d) Includes adjustments associated with 2018 severance charges of approximately $(3) million, $(2) million and $(1) million for Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (e) Includes unamortized deferred severance charges of approximately $(86) million, $(57) million, $(29) million and $(29) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (f) Includes adjustments associated with 2018 severance charges of approximately $(6) million, $(2) million, $(3) million and $(2) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. The table below presents the severance liability for past and ongoing severance plans including the plans described above. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2020 $ 11 $ 2 $ 3 $ 1 $ 2 $ — $ 1 $ — Provision/Adjustments 36 1 1 1 — — — — Cash Reductions (8) (1) (2) (1) (1) — (1) — Balance at December 31, 2021 $ 39 $ 2 $ 2 $ 1 $ 1 $ — $ — $ — Provision/Adjustments 33 14 4 3 1 — — 1 Cash Reductions (8) (1) — — — — — — Balance at December 31, 2022 $ 64 $ 15 $ 6 $ 4 $ 2 $ — $ — $ 1

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION The Duke Energy Corporation 2015 Long-Term Incentive Plan (the 2015 Plan) provides for the grant of stock-based compensation awards to employees and outside directors. The 2015 Plan reserved 10 million shares of common stock for issuance. Duke Energy has historically issued new shares upon exercising or vesting of share-based awards. However, Duke Energy may use a combination of new share issuances and open market repurchases for share-based awards that are exercised or vest in the future. Duke Energy has not determined with certainty the amount of such new share issuances or open market repurchases. The following table summarizes the total expense recognized by the Duke Energy Registrants, net of tax, for stock-based compensation. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy $ 74 $ 64 $ 61 Duke Energy Carolinas 27 23 22 Progress Energy 27 24 23 Duke Energy Progress 17 15 15 Duke Energy Florida 10 9 9 Duke Energy Ohio 5 5 4 Duke Energy Indiana 7 6 6 Piedmont 4 3 3 Duke Energy's pretax stock-based compensation costs, the tax benefit associated with stock-based compensation expense and stock-based compensation costs capitalized are included in the following table. Years Ended December 31, (in millions) 2022 2021 2020 RSU awards $ 58 $ 49 $ 46 Performance awards 42 39 38 Pretax stock-based compensation cost $ 100 $ 88 $ 84 Stock-based compensation costs capitalized 5 5 5 Stock-based compensation expense $ 95 $ 83 $ 79 Tax benefit associated with stock-based compensation expense $ 21 $ 19 $ 18 RESTRICTED STOCK UNIT AWARDS RSU awards generally vest over periods from immediate to three years. Fair value amounts are based on the market price of Duke Energy's common stock on the grant date. The following table includes information related to RSU awards. Years Ended December 31, 2022 2021 2020 Shares granted (in thousands) 654 673 498 Fair value (in millions) $ 64 $ 59 $ 50 The following table summarizes information about RSU awards outstanding. Weighted Average Shares Grant Date Fair Value (in thousands) (per share) Outstanding at December 31, 2021 1,043 $ 92 Granted 654 98 Vested (527) 93 Forfeited (73) 94 Outstanding at December 31, 2022 1,097 95 RSU awards expected to vest 1,056 95 The total grant date fair value of shares vested during the years ended December 31, 2022, 2021 and 2020, was $49 million, $45 million and $43 million, respectively. At December 31, 2022, Duke Energy had $34 million of unrecognized compensation cost, which is expected to be recognized over a weighted average period of 23 months. PERFORMANCE AWARDS Stock-based performance awards generally vest after three years to the extent performance targets are met. The actual number of shares issued will range from zero to 200% of target shares, depending on the level of performance achieved. Performance awards contain performance conditions and a market condition. The performance conditions are based on Duke Energy's cumulative adjusted EPS and total incident case rate (total incident case rate is one of our key employee safety metrics). The market condition is based on TSR of Duke Energy relative to a predefined peer group. Relative TSR is valued using a path-dependent model that incorporates expected relative TSR into the fair value determination of Duke Energy’s performance-based share awards. The model uses three-year historical volatilities and correlations for all companies in the predefined peer group, including Duke Energy, to simulate Duke Energy’s relative TSR as of the end of the performance period. For each simulation, Duke Energy’s relative TSR associated with the simulated stock price at the end of the performance period plus expected dividends within the period results in a value per share for the award portfolio. The average of these simulations is the expected portfolio value per share. Actual life to date results of Duke Energy’s relative TSR for each grant are incorporated within the model. For performance awards granted in 2022, the model used a risk-free interest rate of 1.78%, which reflects the yield on three-year Treasury bonds as of the grant date, and an expected volatility of 26.8% based on Duke Energy's historical volatility over three years using daily stock prices. The following table includes information related to stock-based performance awards. Years Ended December 31, 2022 2021 2020 Shares granted assuming target performance (in thousands) 408 380 319 Fair value (in millions) $ 40 $ 33 $ 34 The following table summarizes information about stock-based performance awards outstanding and assumes payout at the target level. Weighted Average Shares Grant Date Fair Value (in thousands) (per share) Outstanding at December 31, 2021 952 $ 93 Granted 408 99 Vested (297) 86 Forfeited (30) 96 Outstanding at December 31, 2022 1,033 97 Stock-based performance awards expected to vest 1,006 97 The total grant date fair value of shares vested during the years ended December 31, 2022, and 2021, was $25 million and $25 million, respectively. At December 31, 2022, Duke Energy had $22 million of unrecognized compensation cost, which is expected to be recognized over a weighted average period of 22 months.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS DEFINED BENEFIT RETIREMENT PLANS Duke Energy and certain subsidiaries maintain, and the Subsidiary Registrants participate in, qualified, non-contributory defined benefit retirement plans, which consist of the Duke Energy Retirement Cash Balance Plan (RCBP), which is an active plan, and the Duke Energy Legacy Pension Plan (DELPP), which is an inactive plan. These plans cover most employees using a cash balance formula. Under a cash balance formula, a plan participant accumulates a retirement benefit consisting of pay credits based upon a percentage of current eligible earnings, age or age and years of service and interest credits. Certain employees are eligible for benefits that use a final average earnings formula. Under these final average earnings formulas, a plan participant accumulates a retirement benefit equal to the sum of percentages of their (i) highest three-, four-, or five-year average earnings, (ii) highest three-, four-, or five-year average earnings in excess of covered compensation per year of participation (maximum of 35 years) or (iii) highest three-year average earnings times years of participation in excess of 35 years. Duke Energy also maintains, and the Subsidiary Registrants participate in, non-qualified, non-contributory defined benefit retirement plans that cover certain executives. The qualified and non-qualified, non-contributory defined benefit plans are closed to new participants. Duke Energy uses a December 31 measurement date for its defined benefit retirement plan assets and obligations. Actuarial losses experienced by the defined benefit retirement plans in remeasuring plan assets on December 31, 2022, were primarily attributable to actual investment performance that was less than expected investment performance. Actuarial gains experienced by the defined benefit retirement plans in remeasuring plan obligations as of December 31, 2022, were primarily attributable to the increase in the discount rate used to measure plan obligations. Actuarial losses experienced by the defined benefit retirement plans in remeasuring plan assets as of December 31, 2021, were primarily attributable to actual investment performance that was less than expected investment performance. Actuarial gains experienced by the defined benefit retirement plans in remeasuring plan obligations as of December 31, 2021, were primarily attributable to the increase in the discount rate used to measure plan obligations. As a result of the application of settlement accounting due to total lump-sum benefit payments exceeding the settlement threshold (defined as the sum of service cost and interest cost on projected benefit obligation components of net periodic benefit costs) for one of its qualified pension plans, Duke Energy recognized settlement charges of $117 million, of which $95 million was recorded to Regulatory Assets within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets and $22 million was recorded to Other Income and Expenses, net, within the Condensed Consolidated Statement of Operations as of December 31, 2022. Settlement charges recognized by the Subsidiary Registrants as of December 31, 2022, which represent amounts allocated by Duke Energy for employees of the Subsidiary Registrants and allocated charges for their proportionate share of settlement charges for employees of Duke Energy's shared services affiliate, and recorded to Regulatory Assets within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets were $35 million for Duke Energy Carolinas, $23 million for Progress Energy, $16 million for Duke Energy Progress, $7 million for Duke Energy Florida, $8 million for Duke Energy Indiana and $29 million for Piedmont. Settlement charges recognized by the Subsidiary Registrants as of December 31, 2022, recorded to Other Income and Expenses, net, within the Condensed Consolidated Statement of Operations were $3 million for Duke Energy Carolinas, $5 million for Progress Energy, $5 million for Duke Energy Progress, $1 million for Duke Energy Florida, $5 million for Duke Energy Ohio and $6 million for Piedmont. The settlement charges reflect the recognition of a pro-rata portion of previously unrecognized actuarial losses, equal to the percentage of reduction in the projected benefit obligation resulting from total lump-sum benefit payments as of December 31, 2022. Settlement charges recognized as a regulatory asset within Other Noncurrent Assets on the Consolidated Balance Sheets are amortized over the average remaining service period for participants in the plan. Amortization of settlement charges is disclosed in the tables below as a component of net periodic pension costs. Effective December 31, 2022, Duke Energy Florida changed its method for calculating the market related value of plan assets (MRVA) from the fair value method to a method that recognizes changes in fair value of its plan assets over a five-year period. This represents a change in regulatory treatment that will serve to mitigate the impact of market volatility on retail customer rates, resulting in the timing of net periodic pension cost recognition that is more consistent with treatment of the related cost in the ratemaking process. The three-year retrospective impact of this method change of $24 million was recognized by Duke Energy, Progress Energy and Duke Energy Florida, respectively, and was recorded to Other Income and Expenses, net, within the Condensed Consolidated Statement of Operations and has been disclosed in the tables below as a component of net periodic pension costs. Net periodic benefit costs disclosed in the tables below represent the cost of the respective benefit plan for the periods presented prior to capitalization of amounts reflected as Net property, plant and equipment, on the Consolidated Balance Sheets. Only the service cost component of net periodic benefit costs is eligible to be capitalized. The remaining non-capitalized portions of net periodic benefit costs are classified as either: (1) service cost, which is recorded in Operations, maintenance and other on the Consolidated Statements of Operations; or as (2) components of non-service cost, which is recorded in Other income and expenses, net on the Consolidated Statements of Operations. Amounts presented in the tables below for the Subsidiary Registrants represent the amounts of pension and other post-retirement benefit cost allocated by Duke Energy for employees of the Subsidiary Registrants. Additionally, the Consolidated Statements of Operations of the Subsidiary Registrants also include allocated net periodic benefit costs for their proportionate share of pension and post-retirement benefit cost for employees of Duke Energy’s shared services affiliate that provide support to the Subsidiary Registrants. However, in the tables below, these amounts are only presented within the Duke Energy column (except for amortization of settlement charges). These allocated amounts are included in the governance and shared service costs discussed in Note 14. Duke Energy’s policy is to fund amounts on an actuarial basis to provide assets sufficient to meet benefit payments to be paid to plan participants. The following table includes information related to the Duke Energy Registrants’ contributions to its qualified defined benefit pension plans. There were no contributions made in the years ended December 31, 2021 and 2020. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Contributions Made: 2022 $ 58 $ 15 $ 13 $ 8 $ 5 $ 3 $ 5 $ 2 QUALIFIED PENSION PLANS Components of Net Periodic Pension Costs Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 152 $ 48 $ 43 $ 25 $ 17 $ 4 $ 9 $ 5 Interest cost on projected benefit obligation 249 59 77 35 41 13 20 8 Expected return on plan assets (558) (152) (183) (88) (94) (23) (37) (24) Amortization of actuarial loss 81 16 23 12 12 4 9 5 Amortization of prior service credit (18) (3) — — — — (2) (7) Amortization of settlement charges (c) 32 9 8 7 1 5 1 7 MRVA method change 24 — 24 — 24 — — — Net periodic pension costs (a)(b) $ (38) $ (23) $ (8) $ (9) $ 1 $ 3 $ — $ (6) Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 176 $ 56 $ 50 $ 29 $ 21 $ 5 $ 10 $ 6 Interest cost on projected benefit obligation 220 51 70 30 39 13 18 7 Expected return on plan assets (558) (141) (187) (84) (102) (28) (40) (20) Amortization of actuarial loss 133 29 38 18 20 7 13 10 Amortization of prior service credit (29) (8) (2) (1) (1) (1) (2) (9) Amortization of settlement charges 9 5 2 2 1 — — 1 Net periodic pension costs (a)(b) $ (49) $ (8) $ (29) $ (6) $ (22) $ (4) $ (1) $ (5) Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 165 $ 51 $ 48 $ 27 $ 21 $ 5 $ 9 $ 6 Interest cost on projected benefit obligation 269 62 85 38 46 15 22 9 Expected return on plan assets (572) (145) (190) (87) (101) (28) (42) (21) Amortization of actuarial loss 128 28 41 18 23 6 12 9 Amortization of prior service credit (32) (8) (3) (2) (1) — (2) (9) Amortization of settlement charges (c) 18 9 7 6 1 — 1 1 Net periodic pension costs (a)(b) $ (24) $ (3) $ (12) $ — $ (11) $ (2) $ — $ (5) (a) Duke Energy amounts exclude $3 million, $3 million and $4 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. (b) Duke Energy Ohio amounts exclude $1 million, $1 million and $2 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. (c) Includes settlement charges not deferred as a regulatory asset. Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net increase (decrease) $ 367 $ 221 $ 107 $ 101 $ 5 $ (1) $ (12) $ 9 Accumulated other comprehensive loss (income) Deferred income tax expense $ (7) $ — $ (1) $ — $ — $ — $ — $ — Amortization of prior year service credit — — — — — — — — Amortization of prior year actuarial losses 37 — 2 — — — — — Net amount recognized in accumulated other comprehensive income $ 30 $ — $ 1 $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net decrease $ (261) $ (57) $ (128) $ (31) $ (97) $ (17) $ (19) $ (5) Accumulated other comprehensive loss (income) Deferred income tax expense $ 1 $ — $ — $ — $ — $ — $ — $ — Amortization of prior year service credit 1 — — — — — — — Amortization of prior year actuarial losses (8) — (1) — — — — — Net amount recognized in accumulated other comprehensive income $ (6) $ — $ (1) $ — $ — $ — $ — $ — Reconciliation of Funded Status to Net Amount Recognized Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Obligation at prior measurement date $ 8,207 $ 1,903 $ 2,560 $ 1,153 $ 1,392 $ 450 $ 680 $ 273 Service cost 145 47 40 24 16 4 8 5 Interest cost 249 59 77 35 41 13 20 8 Actuarial gain (1,490) (301) (513) (197) (312) (84) (143) (47) Benefits paid (753) (159) (184) (101) (82) (50) (66) (69) Transfers — 5 (5) (5) — — — — Obligation at measurement date $ 6,358 $ 1,554 $ 1,975 $ 909 $ 1,055 $ 333 $ 499 $ 170 Accumulated Benefit Obligation at measurement date $ 6,324 $ 1,556 $ 1,959 $ 910 $ 1,038 $ 327 $ 495 $ 170 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 9,235 $ 2,365 $ 3,053 $ 1,421 $ 1,610 $ 438 $ 669 $ 334 Employer contributions 58 15 13 8 5 3 5 2 Actual return on plan assets (1,547) (411) (506) (240) (262) (68) (107) (64) Benefits paid (753) (159) (184) (101) (82) (50) (66) (69) Transfers — 5 (5) (5) — — — — Plan assets at measurement date $ 6,993 $ 1,815 $ 2,371 $ 1,083 $ 1,271 $ 323 $ 501 $ 203 Funded status of plan $ 635 $ 261 $ 396 $ 174 $ 216 $ (10) $ 2 $ 33 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Obligation at prior measurement date $ 8,634 $ 1,988 $ 2,715 $ 1,193 $ 1,507 $ 502 $ 715 $ 293 Service cost 168 54 48 28 20 5 9 6 Interest cost 220 51 70 30 39 13 18 7 Actuarial gain (200) (42) (108) (18) (89) (10) (10) (5) Benefits paid (615) (148) (161) (80) (81) (50) (52) (28) Transfers — — (4) — (4) (10) — — Obligation at measurement date $ 8,207 $ 1,903 $ 2,560 $ 1,153 $ 1,392 $ 450 $ 680 $ 273 Accumulated Benefit Obligation at measurement date $ 8,144 $ 1,904 $ 2,529 $ 1,154 $ 1,361 $ 439 $ 672 $ 274 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 9,337 $ 2,381 $ 3,049 $ 1,422 $ 1,605 $ 472 $ 684 $ 343 Actual return on plan assets 513 132 169 79 90 26 37 19 Benefits paid (615) (148) (161) (80) (81) (50) (52) (28) Transfers — — (4) — (4) (10) — — Plan assets at measurement date $ 9,235 $ 2,365 $ 3,053 $ 1,421 $ 1,610 $ 438 $ 669 $ 334 Funded status of plan $ 1,028 $ 462 $ 493 $ 268 $ 218 $ (12) $ (11) $ 61 Amounts Recognized in the Consolidated Balance Sheets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded pension (a) $ 885 $ 261 $ 396 $ 174 $ 216 $ 62 $ 90 $ 33 Noncurrent pension liability (b) $ 250 $ — $ — $ — $ — $ 72 $ 88 $ — Net asset (liability) recognized $ 635 $ 261 $ 396 $ 174 $ 216 $ (10) $ 2 $ 33 Regulatory assets $ 2,016 $ 545 $ 670 $ 353 $ 316 $ 92 $ 178 $ 84 Accumulated other comprehensive (income) loss Deferred income tax benefit $ (27) $ — $ (1) $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial loss 129 — 3 — — — — — Net amounts recognized in accumulated other comprehensive loss $ 101 $ — $ 2 $ — $ — $ — $ — $ — December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded pension (a) $ 1,071 $ 462 $ 494 $ 268 $ 219 $ 74 $ 100 $ 61 Noncurrent pension liability (b) $ 43 $ — $ 1 $ — $ 1 $ 86 $ 111 $ — Net asset (liability) recognized $ 1,028 $ 462 $ 493 $ 268 $ 218 $ (12) $ (11) $ 61 Regulatory assets $ 1,649 $ 324 $ 563 $ 252 $ 311 $ 93 $ 190 $ 75 Accumulated other comprehensive (income) loss Deferred income tax benefit $ (20) $ — $ — $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial loss 92 — 1 — — — — — Net amounts recognized in accumulated other comprehensive loss $ 71 $ — $ 1 $ — $ — $ — $ — $ — (a) Included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets. (b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets. Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets December 31, 2022 Duke Duke Duke Energy Energy (in millions) Energy Ohio Indiana Projected benefit obligation $ 3,323 $ 103 $ 198 Accumulated benefit obligation 3,288 99 193 Fair value of plan assets 3,073 31 110 December 31, 2021 Duke Duke Energy Energy (in millions) Ohio Indiana Projected benefit obligation $ 153 $ 284 Accumulated benefit obligation 143 275 Fair value of plan assets 67 173 Assumptions Used for Pension Benefits Accounting The discount rate used to determine the current year pension obligation and following year’s pension expense is based on a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high-quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected. The average remaining service period for participants in active plans and life expectancy of participants in inactive plans is 13 years for Duke Energy and Duke Energy Progress, 15 years for Duke Energy Florida and Duke Energy Ohio, 14 years for Progress Energy and Duke Energy Indiana, 12 years for Duke Energy Carolinas and nine years for Piedmont. The following tables present the assumptions or range of assumptions used for pension benefit accounting. December 31, 2022 2021 2020 Benefit Obligations Discount rate 5.60% 2.90% 2.60% Interest crediting rate 4.35% 4.00% 4.00% Salary increase 3.50 % – 4.00% 3.50 % – 4.00% 3.50 % – 4.00% Net Periodic Benefit Cost Discount rate 2.90 % – 5.70% 2.60% 3.30% Interest crediting rate 4.00% 4.00% 4.00% Salary increase 3.50 % – 4.00% 3.50 % – 4.00% 3.50 % – 4.00% Expected long-term rate of return on plan assets 6.50% 6.50% 6.85% Expected Benefit Payments Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Years ending December 31, 2023 $ 661 $ 186 $ 183 $ 99 $ 83 $ 32 $ 45 $ 19 2024 635 176 180 95 84 31 45 18 2025 629 174 183 97 85 31 44 16 2026 607 164 180 91 87 30 44 16 2027 592 156 177 89 87 29 43 15 2028-2032 2,581 628 804 372 427 135 205 71 NON-QUALIFIED PENSION PLANS The accumulated benefit obligation, which equals the projected benefit obligation for non-qualified pension plans, was $232 million for Duke Energy, $10 million for Duke Energy Carolinas, $78 million for Progress Energy, $24 million for Duke Energy Progress, $32 million for Duke Energy Florida, $3 million for Duke Energy Ohio, $2 million for Duke Energy Indiana and $3 million for Piedmont as of December 31, 2022. Employer contributions, which equal benefits paid for non-qualified pension plans, were $24 million for Duke Energy, $1 million for Duke Energy Carolinas, $10 million for Progress Energy, $3 million for Duke Energy Progress and $4 million for Duke Energy Florida for the year ended December 31, 2022. Employer contributions were not material for Duke Energy Ohio, Duke Energy Indiana or Piedmont for the year ended December 31, 2022. Net periodic pension costs for non-qualified pension plans were not material for the years ended December 31, 2022, 2021 or 2020. OTHER POST-RETIREMENT BENEFIT PLANS Duke Energy provides, and the Subsidiary Registrants participate in, some health care and life insurance benefits for retired employees on a contributory and non-contributory basis. Employees are eligible for these benefits if they have met age and service requirements at retirement, as defined in the plans. The health care benefits include medical, dental, vision and prescription drug coverage and are subject to certain limitations, such as deductibles and copayments. Duke Energy did not make any pre-funding contributions to its other post-retirement benefit plans during the years ended December 31, 2022, 2021 or 2020. Components of Net Periodic Other Post-Retirement Benefit Costs Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 3 $ 1 $ — $ — $ — $ — $ — $ — Interest cost on accumulated post-retirement benefit obligation 17 4 7 4 3 1 1 1 Expected return on plan assets (10) (6) — — — — — (2) Amortization of actuarial loss 2 — 1 1 1 — — — Amortization of prior service credit (8) (3) (2) (1) (1) — — (2) Net periodic post-retirement benefit costs (a)(b) $ 4 $ (4) $ 6 $ 4 $ 3 $ 1 $ 1 $ (3) Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 4 $ 1 $ 1 $ — $ — $ — $ 1 $ — Interest cost on accumulated post-retirement benefit obligation 18 4 7 4 3 1 1 1 Expected return on plan assets (11) (7) — — — — — (2) Amortization of actuarial loss 2 — 1 — 1 — 4 — Amortization of prior service credit (13) (4) (2) (1) (1) (1) (1) (2) Net periodic post-retirement benefit costs (a)(b) $ — $ (6) $ 7 $ 3 $ 3 $ — $ 5 $ (3) Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 4 $ 1 $ 1 $ — $ — $ — $ 1 $ — Interest cost on accumulated post-retirement benefit obligation 23 5 10 5 4 1 2 1 Expected return on plan assets (13) (8) — — — — — (2) Amortization of actuarial loss 2 — 1 — 1 — 4 — Amortization of prior service credit (14) (4) (3) (1) (2) (1) (1) (2) Net periodic post-retirement benefit costs (a)(b) $ 2 $ (6) $ 9 $ 4 $ 3 $ — $ 6 $ (3) (a) Duke Energy amounts exclude $4 million, $5 million and $6 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. (b) Duke Energy Ohio amounts exclude $1 million, $1 million and $1 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net (decrease) increase $ (79) $ — $ (80) $ (45) $ (36) $ — $ (3) $ — Regulatory liabilities, net increase (decrease) $ 27 $ — $ — $ — $ — $ — $ 19 $ (5) Accumulated other comprehensive (income) loss Amortization of prior year actuarial gain $ 1 $ — $ — $ — $ — $ — $ — $ — Net amount recognized in accumulated other comprehensive income $ 1 $ — $ — $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net (decrease) increase $ (15) $ — $ (18) $ (9) $ (9) $ 4 $ (4) $ — Regulatory liabilities, net increase $ 23 $ 12 $ — $ — $ — $ 4 $ 1 $ 2 Accumulated other comprehensive (income) loss Amortization of prior year actuarial gain $ (1) $ — $ — $ — $ — $ — $ — $ — Net amount recognized in accumulated other comprehensive income $ (1) $ — $ — $ — $ — $ — $ — $ — Reconciliation of Funded Status to Accrued Other Post-Retirement Benefit Costs Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Accumulated post-retirement benefit obligation at prior measurement date $ 625 $ 149 $ 263 $ 147 $ 112 $ 25 $ 54 $ 27 Service cost 3 1 — — — — — — Interest cost 17 4 7 4 3 1 1 1 Plan participants' contributions 11 2 4 2 2 1 1 — Actuarial gains (80) (17) (43) (27) (16) (3) (1) (5) Plan amendments (71) (11) (37) (18) (19) — (17) — Benefits paid (68) (16) (26) (13) (13) (4) (8) (2) Accumulated post-retirement benefit obligation at measurement date $ 437 $ 112 $ 168 $ 95 $ 69 $ 20 $ 30 $ 21 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 211 $ 135 $ (1) $ (2) $ (2) $ 9 $ 6 $ 39 Actual return on plan assets (31) (19) — — — (2) — (7) Benefits paid (68) (16) (26) (13) (13) (4) (8) (2) Employer contributions 39 3 23 11 11 3 4 1 Plan participants' contributions 11 2 4 2 2 1 1 — Plan assets at measurement date $ 162 $ 105 $ — $ (2) $ (2) $ 7 $ 3 $ 31 Funded status of plan $ (275) $ (7) $ (168) $ (97) $ (71) $ (13) $ (27) $ 10 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Accumulated post-retirement benefit obligation at prior measurement date $ 709 $ 174 $ 299 $ 166 $ 130 $ 27 $ 61 $ 30 Service cost 4 1 1 — — — 1 — Interest cost 18 4 7 4 3 1 1 1 Plan participants' contributions 14 3 5 3 2 1 2 — Actuarial gains (47) (14) (20) (10) (10) (1) (2) (2) Benefits paid (73) (19) (29) (16) (13) (3) (9) (2) Accumulated post-retirement benefit obligation at measurement date $ 625 $ 149 $ 263 $ 147 $ 112 $ 25 $ 54 $ 27 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 237 $ 139 $ (1) $ (2) $ (1) $ 9 $ 7 $ 37 Actual return on plan assets 15 9 — — — 1 — 3 Benefits paid (73) (19) (29) (16) (13) (3) (9) (2) Employer contributions 18 3 24 13 10 1 6 1 Plan participants' contributions 14 3 5 3 2 1 2 — Plan assets at measurement date $ 211 $ 135 $ (1) $ (2) $ (2) $ 9 $ 6 $ 39 Funded status of plan $ (414) $ (14) $ (264) $ (149) $ (114) $ (16) $ (48) $ 12 Amounts Recognized in the Consolidated Balance Sheets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded post-retirement benefit $ — $ — $ — $ — $ — $ 1 $ — $ 10 Current post-retirement liability (a) 9 — 5 3 2 2 — — Noncurrent post-retirement liability (b) 266 7 163 94 69 12 27 — Net liability (asset) recognized $ 275 $ 7 $ 168 $ 97 $ 71 $ 13 $ 27 $ (10) Regulatory assets $ 50 $ — $ 46 $ 34 $ 11 $ 4 $ 25 $ — Regulatory liabilities $ 189 $ 44 $ — $ — $ — $ 21 $ 82 $ — Accumulated other comprehensive (income) loss Deferred income tax expense $ 3 $ — $ — $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial gain (13) — — — — — — — Net amounts recognized in accumulated other comprehensive income $ (11) $ — $ — $ — $ — $ — $ — $ — December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded post-retirement benefit $ 12 $ — $ — $ — $ — $ 1 $ — $ 12 Current post-retirement liability (a) 9 — 5 3 2 1 — — Noncurrent post-retirement liability (b) 417 14 259 146 112 16 48 — Net liability (asset) recognized $ 414 $ 14 $ 264 $ 149 $ 114 $ 16 $ 48 $ (12) Regulatory assets $ 129 $ — $ 126 $ 79 $ 47 $ 4 $ 28 $ — Regulatory liabilities $ 162 $ 44 $ — $ — $ — $ 21 $ 63 $ 5 Accumulated other comprehensive (income) loss Deferred income tax expense $ 3 $ — $ — $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial gain (14) — — — — — — — Net amounts recognized in accumulated other comprehensive income $ (12) $ — $ — $ — $ — $ — $ — $ — (a) Included in Other within Current Liabilities on the Consolidated Balance Sheets. (b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets. Assumptions Used for Other Post-Retirement Benefits Accounting The discount rate used to determine the current year other post-retirement benefits obligation and following year’s other post-retirement benefits expense is based on a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high-quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected. The average remaining service period of active covered employees is seven years for Duke Energy and Duke Energy Florida, six years for Duke Energy Carolinas, Duke Energy Ohio, Duke Energy Indiana and Piedmont and five years for Progress Energy and Duke Energy Progress. The following tables present the assumptions used for other post-retirement benefits accounting. December 31, 2022 2021 2020 Benefit Obligations Discount rate 5.60 % 2.90 % 2.60 % Net Periodic Benefit Cost Discount rate 2.90 % 2.60 % 3.30 % Expected long-term rate of return on plan assets 6.50 % 6.50 % 6.85 % Assumed Health Care Cost Trend Rate December 31, 2022 2021 Health care cost trend rate assumed for next year 6.50 % 6.25 % Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.75 % 4.75 % Year that rate reaches ultimate trend 2030-2032 2028 Expected Benefit Payments Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Years ending December 31, 2023 $ 68 $ 16 $ 25 $ 14 $ 11 $ 3 $ 7 $ 2 2024 49 13 18 10 7 3 4 2 2025 45 12 16 9 7 2 3 2 2026 41 11 15 9 6 2 3 2 2027 38 10 14 8 6 2 3 2 2028-2032 158 41 61 36 25 8 9 9 PLAN ASSETS Description and Allocations Duke Energy Corporation Master Retirement Trust Assets for both the qualified pension and other post-retirement benefits are maintained in the Duke Energy Corporation Master Retirement Trust. Approximately 98% of the Duke Energy Corporation Master Retirement Trust assets were allocated to qualified pension plans and approximately 2% were allocated to other post-retirement plans (comprised of 401(h) accounts), as of December 31, 2022, and 2021. The investment objective of the Duke Energy Corporation Master Retirement Trust is to invest in a diverse portfolio of assets that is expected to generate positive surplus return over time (i.e., asset growth greater than liability growth) subject to a prudent level of portfolio risk, for the purpose of enhancing the security of benefits for plan participants. As of December 31, 2022, Duke Energy assumes qualified pension and other post-retirement plan assets will generate a long-term rate of return of 8.25% for the RCBP pension and RCBP 401(h) account assets and 6.5% for the DELPP pension and DELPP 401(h) account assets. The expected long-term rate of return was developed using a weighted average calculation of expected returns based primarily on future expected returns across asset classes considering the use of active asset managers, where applicable. The asset allocation targets were set after considering the investment objective and the risk profile. Equity securities are held for their higher expected returns. Debt securities are primarily held to hedge the qualified pension plan. Return seeking debt securities, hedge funds and other global securities are held for diversification. Investments within asset classes are diversified to achieve broad market participation and reduce the impact of individual managers or investments. Effective January 1, 2023, the target asset allocation for the RCBP assets is 35% liability hedging and 65% return-seeking assets and the target asset allocation for the DELPP assets is 80% liability hedging assets and 20% return-seeking assets. Duke Energy periodically reviews its asset allocation targets, and over time, as the funded status of the benefit plans increase, the level of asset risk relative to plan liabilities may be reduced to better manage Duke Energy's benefit plan liabilities and reduce funded status volatility. The Duke Energy Corporation Master Retirement Trust is authorized to engage in the lending of certain plan assets. Securities lending is an investment management enhancement that utilizes certain existing securities of the Duke Energy Corporation Master Retirement Trust to earn additional income. Securities lending involves the loaning of securities to approved parties. In return for the loaned securities, the Duke Energy Corporation Master Retirement Trust receives collateral in the form of cash and securities as a safeguard against possible default of any borrower on the return of t

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Inflation Reduction Act On August 16, 2022, the IRA was signed into law. Among other provisions, the IRA implemented a new 15% corporate alternative minimum tax based on GAAP net income, with certain adjustments as defined by the IRA, and clean energy-related provisions. The IRA's clean energy provisions include, among other provisions, the extension and modification of existing investment and PTCs for projects placed in service through 2024 and introduces new technology-neutral clean energy related credits beginning in 2025. In addition, the IRA created a new, zero-emission nuclear power PTC and a clean hydrogen PTC. Duke Energy has preliminarily reviewed the provisions of the IRA and has determined there were no material impacts on the results of operations, financial position, or cash flows in the periods presented for the Duke Energy Registrants as a result of the IRA being signed into law. Based on the preliminary review of the IRA provisions, future annual cash flow impacts related to the energy credits could be material to the Duke Energy Registrants. However, the majority of Duke Energy's operations are regulated and the FERC and state utility commissions will determine the regulatory treatment. We anticipate the Subsidiary Registrants will defer and expect to pass along the net financial impact associated with the IRA to customers over time. See Note 4 for further details on the IRA as it relates to Duke Energy Florida. Duke Energy will continue to assess the IRA as new information and anticipated guidance from the U.S. Department of the Treasury becomes available. North Carolina's 2021 Appropriations Act On November 18, 2021, North Carolina Senate Bill 105 (SB 105) was signed into law. Starting with tax year 2025, SB 105 begins phasing out the North Carolina corporate income tax rate over five years, from a statutory rate of 2.5% to zero. Duke Energy recorded a net reduction of approximately $490 million to its North Carolina deferred tax liability in the fourth quarter of 2021. The majority of this deferred tax liability reduction was offset by recording a regulatory liability pending NCUC determination of the disposition of the amounts related to Duke Energy Carolinas, Duke Energy Progress and Piedmont. In addition, Duke Energy recorded a net reduction of North Carolina consolidating deferred tax assets of approximately $25 million to deferred state income tax expense in the fourth quarter of 2021. North Carolina SB 105 did not have a significant impact on the financial position, results of operation, or cash flows of Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress or Piedmont. Consolidated Appropriations Act On December 27, 2020, the Consolidated Appropriations Act (CAA) was signed into law. In addition to the CAA providing funding for government operations, it also provided tax provisions to assist with COVID-19 relief, including extending certain expiring tax provisions. The company has reviewed the provisions of the CAA and has determined that there are no material impacts on the financial statements as a result of the CAA being signed into law. CARES Act On March 27, 2020, the CARES Act was enacted. The CARES Act was an emergency economic stimulus package in response to the COVID-19 pandemic. Among other provisions, the CARES Act accelerated the remaining AMT credit refund allowances resulting in taxpayers being able to immediately claim a refund in full for any AMT credit carryforwards and provided for the deferral of certain 2020 payroll taxes. In the third quarter of 2020, Duke Energy received $572 million related to these AMT credit carryforwards and $19 million of interest income. In addition, the company deferred approximately $117 million of payroll taxes, of which, 50% were paid by December 31, 2021, with the remaining 50% payable by December 31, 2022. The other provisions within the CARES Act did not materially impact Duke Energy's income tax accounting. Income Tax Expense Components of Income Tax Expense Tax benefit from discontinued operations, in the following tables, includes income tax benefits related to the Commercial Renewables Disposal Groups. See Note 2 for further details. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current income taxes Federal $ 1 $ (71) $ (13) $ 37 $ (37) $ (2) $ 38 $ 32 State (8) (13) (3) — (23) 1 2 2 Foreign 4 — — — — — — — Total current income taxes (3) (84) (16) 37 (60) (1) 40 34 Deferred income taxes Federal 328 230 310 118 201 (22) (63) 12 State (14) (16) 59 7 84 3 — (7) Total deferred income taxes (a) 314 214 369 125 285 (19) (63) 5 ITC amortization (11) (4) (5) (4) — (1) (1) — Income tax expense from continuing operations 300 126 348 158 225 (21) (24) 39 Tax benefit from discontinued operations (503) — — — — — — — Total income tax (benefit) expense included in Consolidated Statements of Operations $ (203) $ 126 $ 348 $ 158 $ 225 $ (21) $ (24) $ 39 (a) Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $550 million at Duke Energy, $97 million at Duke Energy Carolinas, $128 million at Progress Energy, $9 million at Duke Energy Progress, $111 million at Duke Energy Florida, $7 million at Duke Energy Ohio, $13 million at Duke Energy Indiana, and $12 million at Piedmont. Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current income taxes Federal $ (2) $ 241 $ (15) $ 113 $ (75) $ (8) $ 65 $ 23 State 1 23 (4) 8 (17) (2) 7 3 Foreign 2 — — — — — — — Total current income taxes 1 264 (19) 121 (92) (10) 72 26 Deferred income taxes Federal 275 (130) 203 (16) 202 35 19 17 State — (79) 47 (26) 77 5 16 (13) Total deferred income taxes (a) 275 (209) 250 (42) 279 40 35 4 ITC amortization (8) (4) (4) (4) — — — — Income tax expense from continuing operations 268 51 227 75 187 30 107 30 Tax benefit from discontinued operations (76) — — — — — — — Total income tax expense included in Consolidated Statements of Operations $ 192 $ 51 $ 227 $ 75 $ 187 $ 30 $ 107 $ 30 (a) Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $32 million at Duke Energy Carolinas, $8 million at Duke Energy Indiana, and $3 million at Piedmont. In addition, total deferred income taxes includes utilization of NOL carryforwards and tax credit carryforwards of $250 million at Duke Energy, $95 million at Progress Energy, $14 million at Duke Energy Progress, $64 million at Duke Energy Florida, and $2 million at Duke Energy Ohio. Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current income taxes Federal $ (281) $ 314 $ 280 $ 181 $ 148 $ 10 $ 48 $ (27) State (3) 35 29 17 24 1 7 (8) Foreign 1 — — — — — — — Total current income taxes (283) 349 309 198 172 11 55 (35) Deferred income taxes Federal 222 (171) (167) (180) 1 30 12 60 State (98) (86) (24) (49) 25 2 17 (7) Total deferred income taxes (a) 124 (257) (191) (229) 26 32 29 53 ITC amortization (10) (4) (5) (5) — — — — Income tax (benefit) expense from continuing operations (169) 88 113 (36) 198 43 84 18 Tax benefit from discontinued operations (65) — — — — — — — Total income tax (benefit) expense included in Consolidated Statements of Operations $ (234) $ 88 $ 113 $ (36) $ 198 $ 43 $ 84 $ 18 (a) Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $20 million at Duke Energy Carolinas, $3 million at Duke Energy Progress, $8 million at Duke Energy Indiana, and $11 million at Piedmont. In addition, total deferred income taxes includes utilization of NOL carryforwards and tax credit carryforwards of $39 million at Progress Energy, $30 million at Duke Energy Florida and $189 million at Duke Energy. Duke Energy Income from Continuing Operations before Income Taxes Years Ended December 31, (in millions) 2022 2021 2020 Domestic $ 3,991 $ 3,947 $ 907 Foreign 87 44 13 Income from continuing operations before income taxes $ 4,078 $ 3,991 $ 920 Statutory Rate Reconciliation The following tables present a reconciliation of income tax expense at the U.S. federal statutory tax rate to the actual tax expense from continuing operations. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Income tax expense, computed at the statutory rate of 21% $ 856 $ 362 $ 457 $ 245 $ 238 $ 59 $ 24 $ 76 State income tax, net of federal income tax effect (17) (23) 44 6 48 3 2 (4) Amortization of excess deferred income tax (481) (195) (133) (74) (59) (79) (48) (23) AFUDC equity income (41) (20) (14) (11) (3) (1) (2) (2) AFUDC equity depreciation 36 18 12 6 6 1 4 — Other tax credits (43) (12) (16) (9) (7) (2) (3) (8) Other items, net (10) (4) (2) (5) 2 (2) (1) — Income tax expense from continuing operations $ 300 $ 126 $ 348 $ 158 $ 225 $ (21) $ (24) $ 39 Effective tax rate 7.4 % 7.3 % 16.0 % 13.6 % 19.8 % (7.5) % (21.2) % 10.8 % Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Income tax expense, computed at the statutory rate of 21% $ 838 $ 291 $ 384 $ 224 $ 194 $ 49 $ 123 $ 71 State income tax, net of federal income tax effect 1 (44) 34 (14) 47 2 18 (8) Amortization of excess deferred income tax (438) (184) (174) (120) (54) (22) (34) (25) AFUDC equity income (34) (14) (11) (7) (3) (2) (4) (4) AFUDC equity depreciation 35 18 10 5 5 2 5 — Other tax credits (30) (12) (11) (8) (3) (1) (2) (4) Valuation allowance (a) (85) — — — — — — — Other items, net (19) (4) (5) (5) 1 2 1 — Income tax expense from continuing operations $ 268 $ 51 $ 227 $ 75 $ 187 $ 30 $ 107 $ 30 Effective tax rate 6.7 % 3.7 % 12.4 % 7.0 % 20.2 % 12.8 % 18.2 % 8.8 % (a) In the fourth quarter of 2021, the company recognized a federal capital gain in the amount of $426 million. As a result, a valuation allowance of $85 million related to a federal capital loss carryforward was released. This valuation allowance was originally recorded as a result of the 2019 sale of minority interest of certain renewable assets within the Commercial Renewables Disposal Groups. Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Income tax expense, computed at the statutory rate of 21% $ 193 $ 219 $ 243 $ 80 $ 204 $ 62 $ 103 $ 61 State income tax, net of federal income tax effect (80) (40) 4 (25) 39 2 19 (12) Amortization of excess deferred income tax (276) (82) (118) (68) (49) (20) (36) (21) AFUDC equity income (48) (13) (9) (6) (3) (2) (4) (10) AFUDC equity depreciation 103 19 10 5 5 1 4 — Other tax credits (37) (13) (16) (14) (2) (1) (3) (2) Tax true up (12) (3) 1 (5) 5 — (1) 1 Other items, net (12) 1 (2) (3) (1) 1 2 1 Income tax (benefit) expense from continuing operations $ (169) $ 88 $ 113 $ (36) $ 198 $ 43 $ 84 $ 18 Effective tax rate (18.4) % 8.4 % 9.7 % (9.5) % 20.4 % 14.6 % 17.1 % 6.2 % Valuation allowances have been established for certain state NOL carryforwards and state income tax credits that reduce deferred tax assets to an amount that will be realized on a more-likely-than-not basis. The net change in the total valuation allowance is included in state income tax, net of federal income tax effect, in the above tables. DEFERRED TAXES Net Deferred Income Tax Liability Components The following tables include deferred income tax assets and liabilities related to the Commercial Renewables Disposal Groups. See Note 2 for further details. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Deferred credits and other liabilities $ 348 $ 170 $ 117 $ 33 $ 83 $ 12 $ 23 $ 24 Lease obligations 405 89 263 197 65 4 15 3 Pension, post-retirement and other employee benefits 192 (1) 12 18 (10) 9 10 (2) Progress Energy merger purchase accounting adjustments (a) 301 — — — — — — — Tax credits and NOL carryforwards 4,426 444 618 167 412 20 208 37 Regulatory liabilities and deferred credits — — — — — 3 61 — Investments and other assets — — — — — 3 — — Other 106 18 22 12 10 5 2 9 Valuation allowance (519) — — — — — — — Total deferred income tax assets 5,259 720 1,032 427 560 56 319 71 Investments and other assets (1,671) (983) (521) (432) (102) — (12) (28) Accelerated depreciation rates (11,478) (3,410) (4,358) (1,844) (2,576) (1,192) (1,606) (892) Regulatory assets and deferred debits, net (2,074) (480) (1,300) (628) (671) — — (21) Total deferred income tax liabilities (15,223) (4,873) (6,179) (2,904) (3,349) (1,192) (1,618) (941) Net deferred income tax liabilities $ (9,964) $ (4,153) $ (5,147) $ (2,477) $ (2,789) $ (1,136) $ (1,299) $ (870) (a) Primarily related to lease obligations and debt fair value adjustments. The following table presents the expiration of tax credits and NOL carryforwards. December 31, 2022 (in millions) Amount Expiration Year General Business Credits $ 2,473 2027 — 2042 Federal NOL carryforwards (a) (e) 306 2024 — Indefinite Charitable contribution carryforwards 18 2024 — 2027 State carryforwards and credits (b) (e) 394 2023 — Indefinite Foreign NOL carryforwards (c) 12 2027 — 2037 Foreign Tax Credits (d) 1,223 2024 — 2028 Total tax credits and NOL carryforwards $ 4,426 (a) A valuation allowance of $4 million has been recorded on the Federal NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table. (b) A valuation allowance of $109 million has been recorded on the state NOL and attribute carryforwards, as presented in the Net Deferred Income Tax Liability Components table. (c) A valuation allowance of $12 million has been recorded on the foreign NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table. (d) A valuation allowance of $391 million has been recorded on the foreign tax credits, as presented in the Net Deferred Income Tax Liability Components table. (e) Indefinite carryforward for Federal NOLs, and NOLs for states that have adopted the Tax Act's NOL provisions, generated in tax years beginning after December 31, 2017. December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Deferred credits and other liabilities $ 347 $ 121 $ 101 $ 60 $ 40 $ 19 $ 7 $ 18 Lease obligations 346 91 197 121 76 4 16 4 Pension, post-retirement and other employee benefits 207 (36) 30 17 7 11 20 (8) Progress Energy merger purchase accounting adjustments (a) 340 — — — — — — — Tax credits and NOL carryforwards 3,784 349 497 160 306 13 195 29 Regulatory liabilities and deferred credits — 11 — — — 16 — 6 Investments and other assets — — — — — 5 6 — Other 85 12 12 7 4 7 2 8 Valuation allowance (518) — — — — — — — Total deferred income tax assets 4,591 548 837 365 433 75 246 57 Investments and other assets (2,428) (1,205) (742) (610) (135) — — (39) Accelerated depreciation rates (10,391) (2,977) (3,891) (1,546) (2,382) (1,125) (1,496) (833) Regulatory assets and deferred debits, net (1,151) — (768) (417) (350) — (53) — Total deferred income tax liabilities (13,970) (4,182) (5,401) (2,573) (2,867) (1,125) (1,549) (872) Net deferred income tax liabilities $ (9,379) $ (3,634) $ (4,564) $ (2,208) $ (2,434) $ (1,050) $ (1,303) $ (815) (a) Primarily related to lease obligations and debt fair value adjustments. UNRECOGNIZED TAX BENEFITS The following tables present changes to unrecognized tax benefits. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unrecognized tax benefits – January 1 $ 51 $ 13 $ 15 $ 10 $ 4 $ 1 $ 2 $ 4 Gross decreases – tax positions in prior periods — — — — — — — — Gross increases – current period tax positions 14 4 4 3 1 — — 5 Total changes 14 4 4 3 1 — — 5 Unrecognized tax benefits – December 31 $ 65 $ 17 $ 19 $ 13 $ 5 $ 1 $ 2 $ 9 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unrecognized tax benefits – January 1 $ 125 $ 10 $ 10 $ 6 $ 3 $ 1 $ 1 $ 1 Gross decreases – tax positions in prior periods (a) (86) — — — — — — — Gross increases – current period tax positions 12 3 5 4 1 — 1 3 Total changes (74) 3 5 4 1 — 1 3 Unrecognized tax benefits – December 31 $ 51 $ 13 $ 15 $ 10 $ 4 $ 1 $ 2 $ 4 (a) In the fourth quarter of 2021, the company recognized a federal capital gain in the amount of $426 million. As a result of the capital gain, a previously recorded unrecognized tax benefit related to the character of a taxable loss has been reversed. See note (a) under the Statutory Rate Reconciliation table for more details. Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unrecognized tax benefits – January 1 $ 126 $ 8 $ 9 $ 6 $ 3 $ 1 $ 1 $ 4 Gross decreases – tax positions in prior periods (2) — — — — — — — Gross increases – current period tax positions 4 2 1 — — — — — Reduction due to lapse of statute of limitations (3) — — — — — — (3) Total changes (1) 2 1 — — — — (3) Unrecognized tax benefits – December 31 $ 125 $ 10 $ 10 $ 6 $ 3 $ 1 $ 1 $ 1 The following table includes additional information regarding the Duke Energy Registrants' unrecognized tax benefits at December 31, 2022. None of Duke Energy Registrants anticipates a material increase or decrease in unrecognized tax benefits within the next 12 months. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Amount that if recognized, would affect the effective tax rate or regulatory liability (a) $ 59 $ 17 $ 18 $ 13 $ 5 $ 1 $ 2 $ 8 (a) The Duke Energy Registrants are unable to estimate the specific amounts that would affect the ETR versus the regulatory liability. Duke Energy and its subsidiaries are no longer subject to federal, state, local or non-U.S. income tax examinations by tax authorities for years before 2016, aside from certain state tax attributes carried forward for utilization in future years.

Other Income and Expenses, Net

Other Income and Expenses, Net	12 Months Ended
	Dec. 31, 2022
Other Income and Expenses [Abstract]
Other Income and Expenses, Net	OTHER INCOME AND EXPENSES, NET The components of Other income and expenses, net on the Consolidated Statements of Operations are as follows. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Interest income $ 27 $ 2 $ 24 $ 4 $ 20 $ 11 $ 15 $ 19 AFUDC equity 197 98 68 52 16 7 13 11 Post in-service equity returns 34 14 18 18 — 1 1 — Nonoperating income, other 134 107 71 40 38 — 7 16 Other income and expense, net $ 392 $ 221 $ 181 $ 114 $ 74 $ 19 $ 36 $ 46 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Interest income $ 13 $ 4 $ 8 $ 6 $ 2 $ 4 $ 6 $ 19 AFUDC equity 171 65 51 34 16 7 27 20 Post in-service equity returns 39 21 16 16 — 1 1 — Nonoperating income, other 413 180 140 87 53 6 8 16 Other income and expense, net $ 636 $ 270 $ 215 $ 143 $ 71 $ 18 $ 42 $ 55 Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Interest income $ 30 $ 4 $ 8 $ 2 $ 6 $ 4 $ 6 $ 17 AFUDC equity 154 62 42 29 12 7 23 19 Post in-service equity returns 27 17 8 8 — 1 1 — Nonoperating income, other 240 94 71 36 35 4 7 15 Other income and expense, net $ 451 $ 177 $ 129 $ 75 $ 53 $ 16 $ 37 $ 51

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTSFor information on subsequent events related to dispositions, regulatory matters, commitments and contingencies, and debt and credit facilities see Notes 2, 4, 5 and 7, respectively.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2022
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	QUARTERLY FINANCIAL DATA (UNAUDITED) DUKE ENERGY Quarterly EPS amounts may not sum to the full-year total due to changes in the weighted average number of common shares outstanding and rounding. First Second Third Fourth (in millions, except per share data) Quarter Quarter Quarter Quarter Total 2022 Operating revenues $ 7,011 $ 6,564 $ 7,842 $ 7,351 $ 28,768 Operating income 1,314 1,448 2,056 1,194 6,012 Income from continuing operations 835 898 1,410 635 3,778 (Loss) Income from discontinued operations, net of tax (15) (18) 3 (1,293) (1,323) Net income (loss) 820 880 1,413 (658) 2,455 Net income (loss) available to Duke Energy Corporation common stockholders 818 893 1,383 (650) 2,444 Earnings per share: Income from continuing operations available to Duke Energy Corporation common stockholders Basic and diluted $ 1.06 $ 1.11 $ 1.78 $ 0.80 $ 4.74 Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders Basic and diluted $ 0.02 $ 0.03 $ 0.03 $ (1.66) $ (1.57) Net income (loss) available to Duke Energy Corporation common stockholders Basic and diluted $ 1.08 $ 1.14 $ 1.81 $ (0.86) $ 3.17 2021 Operating revenues $ 6,032 $ 5,638 $ 6,834 $ 6,117 $ 24,621 Operating income 1,466 1,198 1,726 1,110 5,500 Income from continuing operations 967 723 1,333 700 3,723 Loss from discontinued operations, net of tax (26) (25) (57) (36) (144) Net income 941 698 1,276 664 3,579 Net income available to Duke Energy Corporation common stockholders 953 751 1,366 732 3,802 Earnings per share: Income from continuing operations available to Duke Energy Corporation common stockholders Basic and diluted $ 1.22 $ 0.90 $ 1.69 $ 0.86 $ 4.68 Income from discontinued operations attributable to Duke Energy Corporation common stockholders Basic and diluted $ 0.03 $ 0.06 $ 0.10 $ 0.07 $ 0.26 Net income available to Duke Energy Corporation common stockholders Basic and diluted $ 1.25 $ 0.96 $ 1.79 $ 0.93 $ 4.94

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Nature of Operations and Basis of Consolidation	Nature of Operations and Basis of Consolidation Duke Energy is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the FERC and other regulatory agencies listed below. Duke Energy operates in the U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas; Progress Energy; Duke Energy Progress; Duke Energy Florida; Duke Energy Ohio; Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself. These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 18 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 9 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting. Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC. Progress Energy is a public utility holding company, which conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below. Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC. Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC. Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is recovered from retail customers and recorded in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the PUCO, KPSC and FERC. Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC. Piedmont is a regulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC and FERC. Certain prior year amounts have been reclassified to conform to the current year presentation.
Discontinued Operations	Discontinued OperationsDuke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. For the years ended December 31, 2022, 2021 and 2020, the Loss From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations includes amounts related to noncontrolling interests. A portion of Noncontrolling interests on Duke Energy's Consolidated Balance Sheets relates to discontinued operations for the periods presented. See Note 2 for discussion of discontinued operations related to the Commercial Renewables Disposal Groups.
Noncontrolling Interest	Noncontrolling Interest Duke Energy maintains a controlling financial interest in certain less than wholly owned regulated and nonregulated subsidiaries. As a result, Duke Energy consolidates these subsidiaries and presents the third-party investors' portion of Duke Energy's net income (loss), net assets and comprehensive income (loss) as noncontrolling interest. Noncontrolling interest is included as a component of equity on the Consolidated Balance Sheet. Operating agreements of Duke Energy's subsidiaries with noncontrolling interest allocate profit and loss based on their pro rata shares of the ownership interest in the respective subsidiary. Therefore, Duke Energy allocates net income or loss and other comprehensive income or loss of these subsidiaries to the owners based on their pro rata shares.
Use of Estimates	Use of Estimates In preparing financial statements that conform to GAAP, the Duke Energy Registrants must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Regulatory Accounting	Regulatory Accounting The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or FERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. Regulatory assets are reviewed for recoverability each reporting period. If a regulatory asset is no longer deemed probable of recovery, the deferred cost is charged to earnings. See Note 4 for further information. Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery.
Regulated Fuel Costs and Purchased Power	The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted CashAll highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents. Duke Energy, Progress Energy and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. Duke Energy Carolinas and Duke Energy Progress have restricted cash balances related to VIEs from storm recovery bonds issued. See Note 18 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Consolidated Balance Sheets.
Inventory	InventoryInventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Inventory is charged to expense or capitalized to property, plant and equipment when issued, primarily using the average cost method. Excess or obsolete inventory is written down to the lower of cost or net realizable value. Once inventory has been written down, it creates a new cost basis for the inventory that is not subsequently written up. Provisions for inventory write-offs were not material at December 31, 2022, and 2021, respectively.
Investments in Debt and Equity Securities	Investments in Debt and Equity SecuritiesThe Duke Energy Registrants classify investments in equity securities as FV-NI and investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in AOCI until realized, unless it is determined the carrying value of an investment has a credit loss. For certain investments of regulated operations, such as substantially all of the NDTF, realized and unrealized gains and losses (including any credit losses) on debt securities are recorded as a regulatory asset or liability. The credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity.
Goodwill and Intangible Assets	Goodwill Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be a business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 12 for further information. Intangible Assets Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an amortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced.
Long-Lived Asset Impairments	Long-Lived Asset Impairments The Duke Energy Registrants evaluate long-lived assets that are held and used, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the long-lived asset is not recoverable based on these estimated future undiscounted cash flows, the carrying value of the asset is written down to its then current estimated fair value and an impairment charge is recognized. The Duke Energy Registrants assess fair value of long-lived assets that are held and used using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are not limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at the lower of depreciated historical cost net of any disallowances or fair value, if impaired. The Duke Energy Registrants capitalize all construction-related direct labor and material costs, as well as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction and Interest Capitalized” section below for information on capitalized financing costs. Costs of renewals and betterments that extend the useful life of property, plant and equipment are also capitalized. The cost of repairs, replacements and major maintenance projects, which do not extend the useful life or increase the expected output of the asset, are expensed as incurred. Depreciation is generally computed over the estimated useful life of the asset using the composite straight-line method. Depreciation studies are conducted periodically to update composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows. Years Ended December 31, 2022 2021 2020 Duke Energy 3.0 % 2.9 % 3.0 % Duke Energy Carolinas 2.7 % 2.7 % 2.8 % Progress Energy 3.2 % 3.1 % 3.2 % Duke Energy Progress 3.0 % 3.0 % 3.1 % Duke Energy Florida 3.5 % 3.3 % 3.3 % Duke Energy Ohio 2.9 % 2.9 % 2.9 % Duke Energy Indiana 3.6 % 3.6 % 3.5 % Piedmont 2.1 % 2.1 % 2.3 % In general, when the Duke Energy Registrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in advance of its original expected useful life or is abandoned, the cost of the asset and the corresponding accumulated depreciation is recognized as a separate asset. If the asset is still in operation, the net amount is classified as Facilities to be retired, net on the Consolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of long-lived asset impairments above). The carrying value of the asset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, an impairment is recognized to the extent the net book value of the asset exceeds the present value of future revenues discounted at the incremental borrowing rate. When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body. See Note 11 for additional information.
Leases	Leases Duke Energy determines if an arrangement is a lease at contract inception based on whether the arrangement involves the use of a physically distinct identified asset and whether Duke Energy has the right to obtain substantially all of the economic benefits from the use of the asset throughout the period as well as the right to direct the use of the asset. As a policy election, Duke Energy does not evaluate arrangements with initial contract terms of less than one year as leases. Operating leases are included in Operating lease ROU assets, net, Other current liabilities and Operating lease liabilities on the Consolidated Balance Sheets. Finance leases are included in Property, plant and equipment, Current maturities of long-term debt and Long-Term Debt on the Consolidated Balance Sheets. For lessee and lessor arrangements, Duke Energy has elected a policy to not separate lease and non-lease components for all asset classes. For lessor arrangements, lease and non-lease components are only combined under one arrangement and accounted for under the lease accounting framework if the non-lease components are not the predominant component of the arrangement and the lease component would be classified as an operating lease.
Leases	Leases Duke Energy determines if an arrangement is a lease at contract inception based on whether the arrangement involves the use of a physically distinct identified asset and whether Duke Energy has the right to obtain substantially all of the economic benefits from the use of the asset throughout the period as well as the right to direct the use of the asset. As a policy election, Duke Energy does not evaluate arrangements with initial contract terms of less than one year as leases. Operating leases are included in Operating lease ROU assets, net, Other current liabilities and Operating lease liabilities on the Consolidated Balance Sheets. Finance leases are included in Property, plant and equipment, Current maturities of long-term debt and Long-Term Debt on the Consolidated Balance Sheets. For lessee and lessor arrangements, Duke Energy has elected a policy to not separate lease and non-lease components for all asset classes. For lessor arrangements, lease and non-lease components are only combined under one arrangement and accounted for under the lease accounting framework if the non-lease components are not the predominant component of the arrangement and the lease component would be classified as an operating lease.
Nuclear Fuel	Nuclear Fuel Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets. Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method.
Allowance for Funds Used During Construction and Interest Capitalized	Allowance for Funds Used During Construction and Interest Capitalized For regulated operations, the debt and equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets. AFUDC equity, a permanent difference for income taxes, reduces the ETR when capitalized and increases the ETR when depreciated or amortized. See Note 24 for additional information.
Asset Retirement Obligations	Asset Retirement Obligations AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be probable of recovery. The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or liability.
Accounts Payable	Accounts PayableDuring 2020, Duke Energy established a supply chain finance program (the “program”) with a global financial institution. The program is voluntary and allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to the financial institution at a rate that leverages Duke Energy’s credit rating and, which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program, determine at their sole discretion which invoices they will sell to the financial institution. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms, which are based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program.
Revenue Recognition	Revenue Recognition Duke Energy recognizes revenue as customers obtain control of promised goods and services in an amount that reflects consideration expected in exchange for those goods or services. Generally, the delivery of electricity and natural gas results in the transfer of control to customers at the time the commodity is delivered and the amount of revenue recognized is equal to the amount billed to each customer, including estimated volumes delivered when billings have not yet occurred. See Note 19 for further information.
Derivatives and Hedging	Derivatives and Hedging Derivative and non-derivative instruments may be used in connection with commodity price and interest rate activities, including swaps, futures, forwards and options. All derivative instruments, except those that qualify for the NPNS exception, are recorded on the Consolidated Balance Sheets at fair value. Qualifying derivative instruments may be designated as either cash flow hedges or fair value hedges. Other derivative instruments (undesignated contracts) either have not been designated or do not qualify as hedges. The effective portion of the change in the fair value of cash flow hedges is recorded in AOCI. The effective portion of the change in the fair value of a fair value hedge is offset in net income by changes in the hedged item. For activity subject to regulatory accounting, gains and losses on derivative contracts are reflected as regulatory assets or liabilities and not as other comprehensive income or current period income. As a result, changes in fair value of these derivatives have no immediate earnings impact. Formal documentation, including transaction type and risk management strategy, is maintained for all contracts accounted for as a hedge. At inception and at least every three months thereafter, the hedge contract is assessed to see if it is highly effective in offsetting changes in cash flows or fair values of hedged items.
Captive Insurance Reserves	Captive Insurance Reserves Duke Energy has captive insurance subsidiaries that provide coverage, on an indemnity basis, to the Subsidiary Registrants as well as certain third parties, on a limited basis, for financial losses, primarily related to property, workers’ compensation and general liability. Liabilities include provisions for estimated losses incurred but not reported (IBNR), as well as estimated provisions for known claims. IBNR reserve estimates are primarily based upon historical loss experience, industry data and other actuarial assumptions. Reserve estimates are adjusted in future periods as actual losses differ from experience. Duke Energy, through its captive insurance entities, also has reinsurance coverage with third parties for certain losses above a per occurrence and/or aggregate retention. Receivables for reinsurance coverage are recognized when realization is deemed probable.
Preferred Stock	Preferred Stock Preferred stock is reviewed to determine the appropriate balance sheet classification and embedded features, such as call options, are evaluated to determine if they should be bifurcated and accounted for separately. Costs directly related to the issuance of preferred stock are recorded as a reduction of the proceeds received. The liability for the dividend is recognized when declared. The accumulated dividends on the cumulative preferred stock is recognized to net income available to Duke Energy Corporation in the EPS calculation. See Note 20 for further information.
Loss Contingencies and Environmental Liabilities	Loss Contingencies and Environmental Liabilities Contingent losses are recorded when it is probable a loss has occurred and the loss can be reasonably estimated. When a range of the probable loss exists and no amount within the range is a better estimate than any other amount, the minimum amount in the range is recorded. Unless otherwise required by GAAP, legal fees are expensed as incurred. Environmental liabilities are recorded on an undiscounted basis when environmental remediation or other liabilities become probable and can be reasonably estimated. Environmental expenditures related to past operations that do not generate current or future revenues are expensed. Environmental expenditures related to operations that generate current or future revenues are expensed or capitalized, as appropriate. Certain environmental expenditures receive regulatory accounting treatment and are recorded as regulatory assets.
Severance and Special Termination Benefits	Severance and Special Termination BenefitsDuke Energy maintains severance plans for the general employee population under which, in general, the longer a terminated employee worked prior to termination the greater the amount of severance benefits provided. A liability for involuntary severance is recorded once an involuntary severance plan is committed to by management if involuntary severances are probable and can be reasonably estimated. For involuntary severance benefits incremental to its ongoing severance plan benefits, the fair value of the obligation is expensed at the communication date if there are no future service requirements or over the required future service period. Duke Energy also offers special termination benefits under voluntary severance programs. Special termination benefits are recorded immediately upon employee acceptance absent a significant retention period. Otherwise, the cost is recorded over the remaining service period. Employee acceptance of voluntary severance benefits is determined by management based on the facts and circumstances of the benefits being offered.
Guarantees	GuaranteesIf necessary, liabilities are recognized at the time of issuance or material modification of a guarantee for the estimated fair value of the obligation it assumes. Fair value is estimated using a probability weighted approach. The obligation is reduced over the term of the guarantee or related contract in a systematic and rational method as risk is reduced. Duke Energy recognizes a liability for the best estimate of its loss due to the nonperformance of the guaranteed party. This liability is recognized at the inception of a guarantee and is updated periodically.
Income Taxes	Income Taxes Duke Energy and its subsidiaries file a consolidated federal income tax return and other state and foreign jurisdictional returns. The Subsidiary Registrants are parties to a tax-sharing agreement with Duke Energy. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. Deferred income taxes have been provided for temporary differences between GAAP and tax bases of assets and liabilities because the differences create taxable or tax-deductible amounts for future periods. ITCs associated with regulated operations are deferred and amortized as a reduction of income tax expense over the estimated useful lives of the related properties. Accumulated deferred income taxes are valued using the enacted tax rate expected to apply to taxable income in the periods in which the deferred tax asset or liability is expected to be settled or realized. In the event of a change in tax rates, deferred tax assets and liabilities are remeasured as of the enactment date of the new rate. To the extent that the change in the value of the deferred tax represents an obligation to customers, the impact of the remeasurement is deferred to a regulatory liability. Remaining impacts are recorded in income from continuing operations. Duke Energy's results of operations could be impacted if the estimate of the tax effect of reversing temporary differences is not reflective of actual outcomes, is modified to reflect new developments or interpretations of the tax law, revised to incorporate new accounting principles, or changes in the expected timing or manner of a reversal. Tax-related interest and penalties are recorded in Interest Expense and Other Income and Expenses, net in the Consolidated Statements of Operations.
Excise Taxes	Excise TaxesCertain excise taxes levied by state or local governments are required to be paid even if not collected from the customer. These taxes are recognized on a gross basis. Taxes for which Duke Energy operates merely as a collection agent for the state and local government are accounted for on a net basis.
Dividend Restrictions and Unappropriated Retained Earnings	Dividend Restrictions and Unappropriated Retained Earnings Duke Energy does not have any current legal, regulatory or other restrictions on paying common stock dividends to shareholders. However, if Duke Energy were to defer dividend payments on the preferred stock, the declaration of common stock dividends would be prohibited. See Note 20 for more information. Additionally, as further described in Note 4, Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio, Duke Energy Indiana and Piedmont have restrictions on paying dividends or otherwise advancing funds to Duke Energy due to conditions established by regulators in conjunction with merger transaction approvals. At December 31, 2022, and 2021, an insignificant amount of Duke Energy’s consolidated Retained earnings balance represents undistributed earnings of equity method investments.
New Accounting Standard	New Accounting Standards The following accounting standard was adopted by the Duke Energy Registrants in 2021. Leases with Variable Lease Payments. In July 2021, the FASB issued new accounting guidance requiring lessors to classify a lease with variable lease payments that do not depend on a reference index or rate as an operating lease if both of the following are met: (1) the lease would have to be classified as a sales-type or direct financing lease under prior guidance, and (2) the lessor would have recognized a day-one loss. Duke Energy elected to adopt the guidance immediately upon issuance of the new standard and will be applying the new standard prospectively to new lease arrangements meeting the criteria. Duke Energy did not have any lease arrangements that this new accounting guidance materially impacted. The following accounting standard was adopted by the Duke Energy Registrants in 2020. Current Expected Credit Losses. In June 2016, the FASB issued new accounting guidance for credit losses. Duke Energy adopted the new accounting guidance for credit losses effective January 1, 2020, using the modified retrospective method of adoption, which does not require restatement of prior year results. Duke Energy did not adopt any practical expedients. Duke Energy recognizes allowances for credit losses based on management's estimate of losses expected to be incurred over the lives of certain assets or guarantees. Management monitors credit quality, changes in expected credit losses and the appropriateness of the allowance for credit losses on a forward-looking basis. Management reviews the risk of loss periodically as part of the existing assessment of collectability of receivables. Duke Energy reviews the credit quality of its counterparties as part of its regular risk management process and requires credit enhancements, such as deposits or letters of credit, as appropriate and as allowed by regulators.
Earnings Per Share	Basic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements, were exercised or settled.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Schedule of Current and Noncurrent Assets and Liabilities	The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5% of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2022, or 2021. December 31, (in millions) Location 2022 2021 Duke Energy Accrued compensation Current Liabilities $ 778 $ 915 Duke Energy Carolinas Accrued compensation Current Liabilities $ 247 $ 277 Duke Energy Progress Customer deposits Current Liabilities $ 106 $ 144 Other accrued liabilities Current Liabilities 124 163 Duke Energy Florida Customer deposits Current Liabilities $ 200 $ 200 Other accrued liabilities Current Liabilities 61 89 Duke Energy Ohio Gas Storage Current Assets $ 57 $ 25 Collateral liabilities Current Liabilities 53 57 Duke Energy Indiana Mark-to-market transactions Current Assets $ 110 $ 23
Schedule of Cash and Cash Equivalents	The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets. December 31, 2022 Duke Duke Duke Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 409 $ 44 $ 108 $ 49 $ 45 Other 173 8 74 28 41 Other Noncurrent Assets Other 11 1 2 2 — Total cash, cash equivalents and restricted cash $ 593 $ 53 $ 184 $ 79 $ 86 December 31, 2021 Duke Duke Duke Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 341 $ 7 $ 70 $ 35 $ 23 Other 170 — 39 — 39 Other Noncurrent Assets Other 6 1 4 4 — Total cash, cash equivalents and restricted cash $ 517 $ 8 $ 113 $ 39 $ 62
Components of Inventory	The components of inventory are presented in the tables below. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,604 $ 876 $ 1,232 $ 819 $ 413 $ 105 $ 342 $ 12 Coal 620 253 190 99 91 34 144 — Natural gas, oil and other 360 35 157 88 69 5 3 160 Total inventory $ 3,584 $ 1,164 $ 1,579 $ 1,006 $ 573 $ 144 $ 489 $ 172 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,309 $ 793 $ 1,067 $ 729 $ 338 $ 80 $ 311 $ 14 Coal 486 195 167 94 73 19 105 — Natural gas, oil and other 316 38 164 98 66 17 2 95 Total inventory $ 3,111 $ 1,026 $ 1,398 $ 921 $ 477 $ 116 $ 418 $ 109
Schedule of Property, Plant and Equipment	The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows. Years Ended December 31, 2022 2021 2020 Duke Energy 3.0 % 2.9 % 3.0 % Duke Energy Carolinas 2.7 % 2.7 % 2.8 % Progress Energy 3.2 % 3.1 % 3.2 % Duke Energy Progress 3.0 % 3.0 % 3.1 % Duke Energy Florida 3.5 % 3.3 % 3.3 % Duke Energy Ohio 2.9 % 2.9 % 2.9 % Duke Energy Indiana 3.6 % 3.6 % 3.5 % Piedmont 2.1 % 2.1 % 2.3 % The following tables summarize the property, plant and equipment for Duke Energy and its subsidiary registrants. December 31, 2022 Average Remaining Duke Duke Duke Duke Duke Useful Life Duke Energy Progress Energy Energy Energy Energy (in millions) (Years) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Land $ 2,232 $ 565 $ 993 $ 496 $ 497 $ 230 $ 124 $ 295 Plant – Regulated Electric generation, distribution and transmission 39 126,016 46,640 55,872 33,336 22,536 6,900 16,604 — Natural gas transmission and distribution 56 13,174 — — — — 3,773 — 9,401 Other buildings and improvements 40 2,537 973 647 341 306 398 336 183 Plant – Nonregulated Other buildings and improvements 10 369 — — — — — — — Nuclear fuel 3,081 1,723 1,358 1,358 — — — — Equipment 13 2,959 710 936 567 369 441 356 125 Construction in process 7,381 2,671 3,073 1,317 1,756 375 381 478 Other 15 6,090 1,368 1,943 1,460 476 380 320 387 Total property, plant and equipment (a) 163,839 54,650 64,822 38,875 25,940 12,497 18,121 10,869 Total accumulated depreciation – regulated (b)(c) (50,544) (18,669) (20,584) (14,201) (6,377) (3,250) (6,021) (2,081) Total accumulated depreciation – nonregulated (d) (1,556) — — — — — — — Facilities to be retired, net 9 — — — — — — 9 Total net property, plant and equipment $ 111,748 $ 35,981 $ 44,238 $ 24,674 $ 19,563 $ 9,247 $ 12,100 $ 8,797 (a) Includes finance leases of $816 million, $335 million, $674 million, $590 million, $84 million and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $233 million, $81 million and $152 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,683 million, $934 million, $749 million and $749 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $7 million, $51 million and $4 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of ($1 million) at Duke Energy. December 31, 2021 Average Remaining Duke Duke Duke Duke Duke Useful Life Duke Energy Progress Energy Energy Energy Energy (in millions) (Years) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Land $ 2,145 $ 543 $ 957 $ 482 $ 475 $ 219 $ 122 $ 279 Plant – Regulated Electric generation, distribution and transmission 40 120,855 44,910 53,447 32,417 21,030 6,573 15,925 — Natural gas transmission and distribution 54 12,079 — — — — 3,347 — 8,732 Other buildings and improvements 37 1,921 550 514 228 286 381 321 155 Plant – Nonregulated Other buildings and improvements 11 401 — — — — — — — Nuclear fuel 3,181 1,856 1,325 1,325 — — — — Equipment 13 2,659 614 791 497 294 403 262 122 Construction in process 5,979 2,078 2,297 954 1,343 515 460 262 Other 14 5,276 1,323 1,563 1,115 437 287 253 368 Total property, plant and equipment (a) 154,496 51,874 60,894 37,018 23,865 11,725 17,343 9,918 Total accumulated depreciation – regulated (b)(c) (47,611) (17,854) (19,214) (13,387) (5,819) (3,106) (5,583) (1,899) Total accumulated depreciation – nonregulated (d) (1,493) — — — — — — — Facilities to be retired, net 144 102 26 26 — 6 — 11 Total net property, plant and equipment $ 105,536 $ 34,122 $ 41,706 $ 23,657 $ 18,046 $ 8,625 $ 11,760 $ 8,030 (a) Includes finance leases of $958 million, $335 million, $729 million, $627 million, $102 million, and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $178 million, $45 million and $133 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,799 million, $1,064 million, $735 million and $735 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $9 million, $33 million, and $3 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of ($1 million) at Duke Energy. Duke Energy continues to execute on its business transformation strategy, including the evaluation of in-office work policies considering the experience with the COVID-19 pandemic and also workforce realignment of roles and responsibilities. In May 2021, Duke Energy management approved the sale of certain properties and entered into an agreement to exit certain leased space on December 31, 2021. The sale of the properties is subject to abandonment accounting and resulted in an impairment charge. Additionally, the exit of the leased space resulted in the impairment of related furniture, fixtures and equipment. During the year ended December 31, 2021, Duke Energy recorded a pretax charge to earnings of $192 million on the Consolidated Statements of Operations, which includes $133 million within Impairment of assets and other charges, $42 million within Operations, maintenance and other and $17 million within Depreciation and amortization.
Schedule of Accounts Payable and Supplier Invoices Sold	The following table presents the outstanding accounts payable balance sold to the financial institution by our suppliers and the supplier invoices sold to the financial institution under the program included within Net cash provided by operating activities on the Consolidated Statements of Cash Flows as of December 31, 2022, and December 31, 2021. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Outstanding Accounts Payable Balance Sold $ 87 $ 6 $ 19 $ 8 $ 11 $ 5 $ — $ 57 Suppliers Invoices Settled Through The Program 301 29 85 26 59 38 2 147 December 30, 2021 Duke Duke Duke Progress Energy Energy (in millions) Energy Energy Florida Ohio Piedmont Outstanding Accounts Payable Balance Sold $ 19 $ 9 $ 9 $ 6 $ 4 Suppliers Invoices Settled Through The Program 122 10 10 12 100
Schedule of Excise Taxes	Excise taxes accounted for on a gross basis within both Operating Revenues and Property and other taxes in the Consolidated Statements of Operations were as follows. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy $ 449 $ 420 $ 415 Duke Energy Carolinas 47 44 43 Progress Energy 290 250 249 Duke Energy Progress 25 22 26 Duke Energy Florida 265 228 223 Duke Energy Ohio 104 102 96 Duke Energy Indiana 7 23 25 Piedmont 1 1 2
Summary of Effects of New Accounting Pronouncements	Duke Energy recorded an adjustment for the cumulative effect of a change in accounting principle due to the adoption of this standard on January 1, 2020, as shown in the table below: January 1, 2020 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Piedmont Total pretax impact to Retained Earnings $ 120 $ 16 $ 2 $ 1 $ 1 $ 1

Dispositions (Tables)

Dispositions (Tables)	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The following table summarizes the Loss from Discontinued Operations, net of tax recorded on Duke Energy's Consolidated Statements of Operations: Years Ended December 31, (in millions) 2022 2021 2020 Commercial Renewables Disposal Groups $ (1,349) $ (151) $ (14) Other (a) 26 7 7 Loss from Discontinued Operations, net of tax $ (1,323) $ (144) $ (7) (a) Amount represents an income tax benefit resulting from tax adjustments for previously sold businesses not related to the Commercial Renewables Disposal Groups. The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Consolidated Balance Sheets. December 31, (in millions) 2022 2021 Current Assets Held for Sale Cash and cash equivalents $ 10 $ 3 Receivables, net 107 87 Inventory 88 86 Other 57 56 Total current assets held for sale 262 232 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 6,444 7,323 Accumulated depreciation and amortization (1,651) (1,452) Net property, plant and equipment 4,793 5,871 Operating lease right-of-use assets, net 140 130 Investments in equity method unconsolidated affiliates 522 513 Other 179 181 Total other noncurrent assets held for sale 841 824 Total Assets Held for Sale $ 5,896 $ 6,927 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 122 $ 98 Taxes accrued 17 18 Other 120 51 Total current liabilities associated with assets held for sale 259 167 Noncurrent Liabilities Associated with Assets Held for Sale Operating lease liabilities 150 134 Asset retirement obligations 190 175 Other 399 303 Total other noncurrent liabilities associated with assets held for sale 739 612 Total Liabilities Associated with Assets Held for Sale $ 998 $ 779 As of December 31, 2022, the noncontrolling interest balance is $1.6 billion. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations. Years Ended December 31, (in millions) 2022 2021 2020 Operating revenues $ 465 $ 476 $ 502 Operation, maintenance and other 337 343 292 Depreciation and amortization (a) 201 227 200 Property and other taxes 36 34 26 Other income and expenses, net 2 (27) 1 Interest expense 10 72 66 Loss on disposal 1,748 — — Loss before income taxes (1,865) (227) (81) Income tax benefit (516) (76) (67) Loss from discontinued operations $ (1,349) $ (151) $ (14) Add: Net loss attributable to noncontrolling interest included in discontinued operations 108 344 296 Net income from discontinued operations attributable to Duke Energy Corporation $ (1,241) $ 193 $ 282 (a) Upon meeting the criteria for assets held for sale, beginning in November 2022 depreciation and amortization expense were ceased. The Commercial Renewables Disposal Groups' held for sale assets included pretax impairments of approximately $1.7 billion for the year ended December 31, 2022. The impairment was recorded to write-down the carrying amount of the property, plant and equipment assets to the estimated fair value of the business, based on the expected selling price less estimated cost to sell. These losses were included in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations and Comprehensive Income. The fair value was primarily determined from the income approach using discounted cash flows but also considered market information obtained through the bidding process. The discounted cash flow model utilized Level 2 and Level 3 inputs. The fair value hierarchy levels are further discussed in Note 17. The impairment will be updated, if necessary, based on the final sales price, after any adjustments at closing for working capital and capital expenditures. Duke Energy has elected not to separately disclose discontinued operations on Duke Energy's Consolidated Statements of Cash Flows. The following table summarizes Duke Energy's cash flows from discontinued operations related to the Commercial Renewables Disposal Groups. Years Ended December 31, (in millions) 2022 2021 2020 Cash flows provided by (used in): Operating activities $ 213 $ 62 $ 466 Investing activities (802) (542) (1,102)

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting Information [Line Items]
Business Segment Data	Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Year Ended December 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated Revenues $ 25,990 $ 2,748 $ 28,738 $ 30 $ — $ 28,768 Intersegment Revenues 34 92 126 92 (218) — Total Revenues $ 26,024 $ 2,840 $ 28,864 $ 122 $ (218) $ 28,768 Interest Expense $ 1,565 $ 182 $ 1,747 $ 778 $ (86) $ 2,439 Depreciation and amortization 4,550 327 4,877 236 (27) 5,086 Equity in earnings of unconsolidated affiliates 7 20 27 86 — 113 Income tax expense (benefit) 536 8 544 (244) — 300 Segment income (loss) (a)(b) 3,929 468 4,397 (737) (1) 3,659 Less noncontrolling interest 95 Add back preferred stock dividend 106 Discontinued operations (1,215) Net income $ 2,455 Capital investments expenditures and acquisitions (c) $ 8,985 $ 1,295 $ 10,280 $ 1,139 $ — $ 11,419 Segment assets (d) 152,104 16,411 168,515 9,571 — 178,086 (a) EU&I includes $386 million recorded within Impairment of assets and other charges, $46 million within Regulated electric revenues and $34 million within Noncontrolling Interests related to the Duke Energy Indiana court rulings on coal ash on the Consolidated Statements of Operations. See Note 4 for additional information. (b) Other includes $72 million recorded within Impairment of assets and other charges, $71 million within Operations, maintenance and other and a $7 million gain within Gains on sales of other assets related to costs attributable to business transformation, including long-term real estate strategy changes and workforce realignment on the Consolidated Statements of Operations; it also includes $25 million recorded within Operations, maintenance and other related to litigation on the Consolidated Statements of Operations. (c) Other includes capital investments expenditures and acquisitions related to the Commercial Renewables Disposal Groups. (d) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Year Ended December 31, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated Revenues $ 22,570 $ 2,022 $ 24,592 $ 29 $ — $ 24,621 Intersegment Revenues 33 90 123 84 (207) — Total Revenues $ 22,603 $ 2,112 $ 24,715 $ 113 $ (207) $ 24,621 Interest Expense $ 1,432 $ 142 $ 1,574 $ 643 $ (10) $ 2,207 Depreciation and amortization 4,251 303 4,554 236 (28) 4,762 Equity in earnings of unconsolidated affiliates 7 8 15 47 — 62 Income tax expense (benefit) 494 55 549 (281) — 268 Segment income (loss) (a)(b)(c) 3,850 396 4,246 (641) (3) 3,602 Less noncontrolling interest 329 Add back preferred stock dividend 106 Discontinued operations 200 Net income $ 3,579 Capital investments expenditures and acquisitions (d) $ 7,653 $ 1,271 $ 8,924 $ 828 $ — $ 9,752 Segment assets (e) 143,841 15,179 159,020 10,567 — 169,587 (a) EU&I includes $160 million of expense recorded within Impairment of assets and other charges, $77 million of income within Other Income and expenses, $5 million of expense within Operations, maintenance and other, $13 million of income within regulated operating revenues, $3 million of expense within interest expense and $6 million of expense within Depreciation and amortization on the Duke Energy Carolinas' Consolidated Statement of Operations related to the South Carolina Supreme Court decision on coal ash and insurance proceeds; it also includes $42 million of expense recorded within Impairment of assets and other charges, $34 million of income within Other Income and expenses, $7 million of expense within Operations, maintenance, and other, $15 million of income within Regulated electric operating revenues, $5 million of expense wit hin interest expense and $1 million of expense within Depreciation and amortization on the Duke Energy Progress' Consolidated Statement of Operations. See Notes 4 and 5 for more information. (b) GU&I includes $20 million, recorded within Equity in earnings (losses) of unconsolidated affiliates on the Consolidated Statements of Operations, related to natural gas pipeline investments. See Note 4 for additional information. (c) Other includes $133 million recorded within Impairment of assets and other charges, $42 million within Operations, maintenance and other, and $17 million within Depreciation and amortization on the Consolidated Statements of Operations, related to the workplace and workforce realignment. See Note 11 for additional information. (d) Other includes capital investments expenditures and acquisitions related to the Commercial Renewables Disposal Groups. (e) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Year Ended December 31, 2020 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated Revenues $ 21,687 $ 1,653 $ 23,340 $ 26 $ — $ 23,366 Intersegment Revenues 33 95 128 73 (201) — Total Revenues $ 21,720 $ 1,748 $ 23,468 $ 99 $ (201) $ 23,366 Interest Expense $ 1,320 $ 135 $ 1,455 $ 657 $ (15) $ 2,097 Depreciation and amortization 4,068 258 4,326 207 (29) 4,504 Equity in (losses) earnings of unconsolidated affiliates (1) (2,017) (2,018) 13 — (2,005) Income tax expense (benefit) 340 (349) (9) (160) — (169) Segment income (loss) (a)(b)(c) 2,669 (1,266) 1,403 (418) (4) 981 Less noncontrolling interest 295 Add back preferred stock dividend 107 Discontinued operations 289 Net income $ 1,082 Capital investments expenditures and acquisitions (d) $ 7,629 $ 1,309 $ 8,938 $ 1,483 $ — $ 10,421 Segment assets (e) 138,225 13,849 152,074 10,314 — 162,388 (a) EU&I includes $948 million of Impairment of assets and other charges and a reversal of $152 million included in Regulated electric operating revenue related to the CCR Settlement Agreement filed with the NCUC. Additionally, EU&I includes $19 million of Impairment of assets and other charges related to the Clemson University Combined Heat and Power Plant, $5 million of Impairment charges related to the natural gas pipeline assets and $16 million of shareholder contributions within Operations, maintenance and other related to Duke Energy Carolinas' and Duke Energy Progress' 2019 North Carolina rate cases. See Note 4 for additional information. (b) GU&I includes $2.1 billion recorded within Equity in (losses) earnings of unconsolidated affiliates and $7 million of Impairment of assets and other charges related to natural gas pipeline investments. See Notes 4 and 13 for additional information. (c) Other includes a $98 million reversal of 2018 severance costs due to a partial settlement in the Duke Energy Carolinas' 2019 North Carolina rate case. See Note 21 for additional information. (d) Other includes capital investments expenditures and acquisitions related to the Commercial Renewables Disposal Groups. (e) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information.
Schedule of Revenue, By Products and Services	Products and Services The following table summarizes revenues of the reportable segments by type. Retail Wholesale Retail Total (in millions) Electric Electric Natural Gas Other Revenues 2022 Electric Utilities and Infrastructure $ 22,036 $ 2,882 $ — $ 1,106 $ 26,024 Gas Utilities and Infrastructure — — 2,535 305 2,840 Total Reportable Segments $ 22,036 $ 2,882 $ 2,535 $ 1,411 $ 28,864 2021 Electric Utilities and Infrastructure $ 19,410 $ 2,216 $ — $ 977 $ 22,603 Gas Utilities and Infrastructure — — 2,025 87 2,112 Total Reportable Segments $ 19,410 $ 2,216 $ 2,025 $ 1,064 $ 24,715 2020 Electric Utilities and Infrastructure $ 18,898 $ 1,878 $ — $ 944 $ 21,720 Gas Utilities and Infrastructure — — 1,691 57 1,748 Total Reportable Segments $ 18,898 $ 1,878 $ 1,691 $ 1,001 $ 23,468
Duke Energy Ohio
Segment Reporting Information [Line Items]
Business Segment Data	Year Ended December 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 1,798 $ 716 $ 2,514 $ — $ — $ 2,514 Interest expense $ 86 $ 43 $ 129 $ — $ — $ 129 Depreciation and amortization 221 103 324 — — 324 Income tax expense (benefit) 24 (43) (19) (2) — (21) Segment income (loss)/Net income 189 121 310 (8) — 302 Capital expenditures $ 488 $ 362 $ 850 $ — $ — $ 850 Segment assets 7,504 4,164 11,668 14 (176) 11,506 Year Ended December 31, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 1,493 $ 544 $ 2,037 $ — $ — $ 2,037 Interest expense $ 87 $ 24 $ 111 $ — $ — $ 111 Depreciation and amortization 217 90 307 — — 307 Income tax expense (benefit) 15 19 34 (4) — 30 Segment income (loss)/Net Income 141 78 219 (15) — 204 Capital expenditures $ 486 $ 362 $ 848 $ — $ — $ 848 Segment assets 6,882 3,892 10,774 29 (29) 10,774 Year Ended December 31, 2020 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 1,405 $ 453 $ 1,858 $ — $ — $ 1,858 Interest expense $ 85 $ 17 $ 102 $ — $ — $ 102 Depreciation and amortization 200 78 278 — — 278 Income tax expense (benefit) 19 26 45 (2) — 43 Segment income (loss) 162 96 258 (6) — 252 Capital expenditures $ 548 $ 286 $ 834 $ — $ — $ 834 Segment assets 6,615 3,380 9,995 32 (2) 10,025

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2022
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant. Duke Energy Progress Energy December 31, December 31, (in millions) 2022 2021 2022 2021 Regulatory Assets AROs – coal ash $ 3,205 $ 3,408 $ 1,429 $ 1,399 AROs – nuclear and other 945 684 884 620 Deferred fuel and purchased power 3,866 1,253 2,060 718 Accrued pension and OPEB 2,336 2,017 759 725 Storm cost securitized balance, net 940 991 720 759 Nuclear asset securitized balance, net 881 937 881 937 Debt fair value adjustment 829 884 — — Storm cost deferrals 666 213 559 189 Hedge costs deferrals 378 348 128 137 Post-in-service carrying costs (PISCC) and deferred operating expenses 342 356 42 47 Retired generation facilities 316 357 243 265 Deferred asset – Lee and Harris COLA 288 317 21 21 Advanced metering infrastructure (AMI) 283 311 111 130 Customer connect project 271 242 136 124 Costs of removal regulatory asset 221 107 221 107 Vacation accrual 222 221 43 42 Incremental COVID-19 expenses 210 87 78 28 CEP deferral 190 161 — — Demand side management (DSM)/Energy efficiency (EE) 189 235 188 230 Derivatives – natural gas supply contracts 168 139 — — NCEMPA deferrals 157 165 157 165 Nuclear deferral 154 120 64 42 Deferred pipeline integrity costs 121 108 — — COR settlement 120 123 32 32 Deferred coal ash handling system costs 92 90 25 23 Qualifying facility contract buyouts 81 94 81 94 Amounts due from customers 57 85 — — Propane caverns 26 — — — Deferred severance charges 21 54 7 18 Manufactured gas plant (MGP) — 104 — — Other 555 426 110 87 Total regulatory assets 18,130 14,637 8,979 6,939 Less: current portion 3,485 2,150 1,833 1,030 Total noncurrent regulatory assets $ 14,645 $ 12,487 $ 7,146 $ 5,909 Regulatory Liabilities Net regulatory liability related to income taxes $ 6,462 $ 7,199 $ 2,192 $ 2,394 Costs of removal 5,151 6,150 2,269 2,955 AROs – nuclear and other 1,038 2,053 — — Hedge cost deferrals 683 364 252 155 Accrued pension and OPEB 211 213 — — DOE Settlement 154 — 154 — Provision for rate refunds 78 274 28 87 Amounts to be refunded to customers 45 — — — Other 1,226 1,110 434 453 Total regulatory liabilities 15,048 17,363 5,329 6,044 Less: current portion 1,466 1,211 576 478 Total noncurrent regulatory liabilities $ 13,582 $ 16,152 $ 4,753 $ 5,566
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant. Duke Energy Progress Energy December 31, December 31, (in millions) 2022 2021 2022 2021 Regulatory Assets AROs – coal ash $ 3,205 $ 3,408 $ 1,429 $ 1,399 AROs – nuclear and other 945 684 884 620 Deferred fuel and purchased power 3,866 1,253 2,060 718 Accrued pension and OPEB 2,336 2,017 759 725 Storm cost securitized balance, net 940 991 720 759 Nuclear asset securitized balance, net 881 937 881 937 Debt fair value adjustment 829 884 — — Storm cost deferrals 666 213 559 189 Hedge costs deferrals 378 348 128 137 Post-in-service carrying costs (PISCC) and deferred operating expenses 342 356 42 47 Retired generation facilities 316 357 243 265 Deferred asset – Lee and Harris COLA 288 317 21 21 Advanced metering infrastructure (AMI) 283 311 111 130 Customer connect project 271 242 136 124 Costs of removal regulatory asset 221 107 221 107 Vacation accrual 222 221 43 42 Incremental COVID-19 expenses 210 87 78 28 CEP deferral 190 161 — — Demand side management (DSM)/Energy efficiency (EE) 189 235 188 230 Derivatives – natural gas supply contracts 168 139 — — NCEMPA deferrals 157 165 157 165 Nuclear deferral 154 120 64 42 Deferred pipeline integrity costs 121 108 — — COR settlement 120 123 32 32 Deferred coal ash handling system costs 92 90 25 23 Qualifying facility contract buyouts 81 94 81 94 Amounts due from customers 57 85 — — Propane caverns 26 — — — Deferred severance charges 21 54 7 18 Manufactured gas plant (MGP) — 104 — — Other 555 426 110 87 Total regulatory assets 18,130 14,637 8,979 6,939 Less: current portion 3,485 2,150 1,833 1,030 Total noncurrent regulatory assets $ 14,645 $ 12,487 $ 7,146 $ 5,909 Regulatory Liabilities Net regulatory liability related to income taxes $ 6,462 $ 7,199 $ 2,192 $ 2,394 Costs of removal 5,151 6,150 2,269 2,955 AROs – nuclear and other 1,038 2,053 — — Hedge cost deferrals 683 364 252 155 Accrued pension and OPEB 211 213 — — DOE Settlement 154 — 154 — Provision for rate refunds 78 274 28 87 Amounts to be refunded to customers 45 — — — Other 1,226 1,110 434 453 Total regulatory liabilities 15,048 17,363 5,329 6,044 Less: current portion 1,466 1,211 576 478 Total noncurrent regulatory liabilities $ 13,582 $ 16,152 $ 4,753 $ 5,566
Schedule of Potential Plant Retirements	The table below contains the net carrying value of generating facilities planned for retirement or included in recent IRPs or Carbon Plan as evaluated for potential retirement. Dollar amounts in the table below are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2022, and exclude capitalized asset retirement costs. Remaining Net Capacity Book Value (in MW) (in millions) Duke Energy Carolinas Allen Steam Station Unit 1 (a) 167 $ 10 Allen Steam Station Unit 5 (b) 259 233 Cliffside Unit 5 (b) 546 344 Marshall Units 1-2 (b) 760 428 Duke Energy Progress Mayo Unit 1 (b) 713 639 Roxboro Units 3-4 (b) 1,409 425 Duke Energy Florida Crystal River Units 4-5 (c) 1,442 1,549 Duke Energy Indiana Gibson Units 1-5 (d) 2,845 2,043 Cayuga Units 1-2 (d) 1,005 622 Total Duke Energy 9,146 $ 6,293 (a) As part of the 2015 resolution of a lawsuit involving alleged New Source Review violations, Duke Energy Carolinas must retire Allen Steam Station Unit 1 by December 31, 2024. (b) These units were included in the IRP filed by Duke Energy Carolinas and Duke Energy Progress in South Carolina on September 1, 2020, and in the Carbon Plan adopted by the NCUC in December 2022. The long-term energy options considered could result in retirement of these units earlier than their current estimated useful lives. (c) On January 14, 2021, Duke En ergy Florida filed the 2021 Settlement agreement with the FPSC, which proposed depreciation rates reflecting retirement dates for Duke Energy Florida's last two coal-fired generating facilities, Crystal River Units 4-5, eight years ahead of schedule in 2034 rather than in 2042. The FPSC approved the 2021 Settlement on May 4, 2021. The remaining net book value reflected in the table above excludes $200 million of accelerated deprecation collected from retail customers pursuant to Duke Energy Florida's 2017 Settlement. (d) The rate case filed July 2, 2019, included proposed depreciation rates reflecting retirement dates from 2026 to 2038. The depreciation rates reflecting these updated retirement dates were approved by the IURC as part of the rate case order issued on June 29, 2020.
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 1,391 $ 1,227 (g) (b) Deferred fuel and purchased power (i) 1,614 339 (e) 2024 Accrued pension and OPEB (c) 614 365 Yes (h) Storm cost securitized balance, net 220 232 2041 Storm cost deferrals 93 22 Yes (b) Hedge costs deferrals (c) 228 171 Yes (b) PISCC and deferred operating expenses (c) 30 31 Yes (b) Retired generation facilities (c) 39 54 Yes (b) Deferred asset – Lee COLA 267 296 (b) AMI 139 140 Yes (b) Customer connect project 62 66 Yes (b) Vacation accrual 84 83 2023 Incremental COVID-19 expenses 127 51 Yes (b) Nuclear deferral 90 78 2024 COR settlement 88 91 Yes (b) Deferred coal ash handling system costs 67 67 Yes (b) Other 235 166 (b) Total regulatory assets 5,388 3,479 Less: current portion 1,095 544 Total noncurrent regulatory assets $ 4,293 $ 2,935 Regulatory Liabilities (a) Net regulatory liability related to income taxes (d) $ 2,475 $ 2,785 (b) Costs of removal (c) 1,769 2,009 Yes (f) AROs – nuclear and other 1,038 2,053 (b) Hedge cost deferrals 350 209 (b) Accrued pension and OPEB (c) 44 44 Yes (h) Provision for rate refunds 50 124 Yes (b) Other 587 461 (b) Total regulatory liabilities 6,313 7,685 Less: current portion 530 487 Total noncurrent regulatory liabilities $ 5,783 $ 7,198 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 24. Portions are included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. (f) Recovered over the life of the associated assets. (g) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (i) Duke Energy Carolinas submitted a fuel filing to the NCUC in May 2022 for recovery of $327 million, which included deferrals through January 2022. This amount is expected to be recovered through August 2023. The next filing will be made in the first quarter of 2023. Duke Energy Carolinas submitted a fuel filing to the PSCSC in July 2022 for recovery of $79 million, which included deferrals through May 2022. The amount is expected to be recovered through September 2023. The next filing will be made in the third quarter of 2023.
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 1,391 $ 1,227 (g) (b) Deferred fuel and purchased power (i) 1,614 339 (e) 2024 Accrued pension and OPEB (c) 614 365 Yes (h) Storm cost securitized balance, net 220 232 2041 Storm cost deferrals 93 22 Yes (b) Hedge costs deferrals (c) 228 171 Yes (b) PISCC and deferred operating expenses (c) 30 31 Yes (b) Retired generation facilities (c) 39 54 Yes (b) Deferred asset – Lee COLA 267 296 (b) AMI 139 140 Yes (b) Customer connect project 62 66 Yes (b) Vacation accrual 84 83 2023 Incremental COVID-19 expenses 127 51 Yes (b) Nuclear deferral 90 78 2024 COR settlement 88 91 Yes (b) Deferred coal ash handling system costs 67 67 Yes (b) Other 235 166 (b) Total regulatory assets 5,388 3,479 Less: current portion 1,095 544 Total noncurrent regulatory assets $ 4,293 $ 2,935 Regulatory Liabilities (a) Net regulatory liability related to income taxes (d) $ 2,475 $ 2,785 (b) Costs of removal (c) 1,769 2,009 Yes (f) AROs – nuclear and other 1,038 2,053 (b) Hedge cost deferrals 350 209 (b) Accrued pension and OPEB (c) 44 44 Yes (h) Provision for rate refunds 50 124 Yes (b) Other 587 461 (b) Total regulatory liabilities 6,313 7,685 Less: current portion 530 487 Total noncurrent regulatory liabilities $ 5,783 $ 7,198 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 24. Portions are included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. (f) Recovered over the life of the associated assets. (g) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (i) Duke Energy Carolinas submitted a fuel filing to the NCUC in May 2022 for recovery of $327 million, which included deferrals through January 2022. This amount is expected to be recovered through August 2023. The next filing will be made in the first quarter of 2023. Duke Energy Carolinas submitted a fuel filing to the PSCSC in July 2022 for recovery of $79 million, which included deferrals through May 2022. The amount is expected to be recovered through September 2023. The next filing will be made in the third quarter of 2023.
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 1,418 $ 1,389 (g) (b) AROs – nuclear and other 869 613 (c) Deferred fuel and purchased power (l) 705 303 (e) 2024 Accrued pension and OPEB (d) 417 351 Yes (j) Storm cost securitized balance, net 720 759 2041 Storm cost deferrals 234 170 Yes (b) Hedge costs deferrals 55 60 (b) PISCC and deferred operating expenses 42 47 Yes 2054 Retired generation facilities 149 171 Yes (b) Deferred asset - Harris COLA 21 21 (b) AMI 81 92 Yes (b) Customer connect project 54 57 Yes (b) Vacation accrual 43 42 2023 Incremental COVID-19 expenses 78 28 Yes (b) DSM/EE (d) 180 218 (h) (h) NCEMPA deferrals 157 165 (f) 2042 Nuclear deferral 64 42 2024 COR settlement 32 32 Yes (b) Deferred coal ash handling system costs 25 23 Yes (b) Other 70 68 (b) Total regulatory assets 5,414 4,651 Less: current portion 690 533 Total noncurrent regulatory assets $ 4,724 $ 4,118 Regulatory Liabilities (a) Net regulatory liability related to income taxes (k) $ 1,559 $ 1,695 (b) Costs of removal (d) 2,269 2,955 Yes (i) Hedge cost deferrals 252 155 (b) Provision for rate refunds 28 87 Yes (b) Other 344 357 (b) Total regulatory liabilities 4,452 5,249 Less: current portion 332 381 Total noncurrent regulatory liabilities $ 4,120 $ 4,868 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit. (d) Included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. (f) South Carolina retail allocated costs are earning a return. (g) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (i) Recovered over the life of the associated assets. (j) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (k) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 24. Portions are included in rate base. (l) Duke Energy Progress submitted a fuel filing to the NCUC in August 2022 for recovery of $251 million, which included deferrals through June 2022. This amount is expected to be recovered through November 2023. The next filing will be made in the second quarter of 2023. Duke Energy Progress submitted a fuel filing to the PSCSC in April 2022 for recovery of $44 million, which included deferrals through February 2022. This amount is expected to be recovered through June 2023. The next filing will be made in the second quarter of 2023.
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 1,418 $ 1,389 (g) (b) AROs – nuclear and other 869 613 (c) Deferred fuel and purchased power (l) 705 303 (e) 2024 Accrued pension and OPEB (d) 417 351 Yes (j) Storm cost securitized balance, net 720 759 2041 Storm cost deferrals 234 170 Yes (b) Hedge costs deferrals 55 60 (b) PISCC and deferred operating expenses 42 47 Yes 2054 Retired generation facilities 149 171 Yes (b) Deferred asset - Harris COLA 21 21 (b) AMI 81 92 Yes (b) Customer connect project 54 57 Yes (b) Vacation accrual 43 42 2023 Incremental COVID-19 expenses 78 28 Yes (b) DSM/EE (d) 180 218 (h) (h) NCEMPA deferrals 157 165 (f) 2042 Nuclear deferral 64 42 2024 COR settlement 32 32 Yes (b) Deferred coal ash handling system costs 25 23 Yes (b) Other 70 68 (b) Total regulatory assets 5,414 4,651 Less: current portion 690 533 Total noncurrent regulatory assets $ 4,724 $ 4,118 Regulatory Liabilities (a) Net regulatory liability related to income taxes (k) $ 1,559 $ 1,695 (b) Costs of removal (d) 2,269 2,955 Yes (i) Hedge cost deferrals 252 155 (b) Provision for rate refunds 28 87 Yes (b) Other 344 357 (b) Total regulatory liabilities 4,452 5,249 Less: current portion 332 381 Total noncurrent regulatory liabilities $ 4,120 $ 4,868 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit. (d) Included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. (f) South Carolina retail allocated costs are earning a return. (g) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (i) Recovered over the life of the associated assets. (j) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (k) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 24. Portions are included in rate base. (l) Duke Energy Progress submitted a fuel filing to the NCUC in August 2022 for recovery of $251 million, which included deferrals through June 2022. This amount is expected to be recovered through November 2023. The next filing will be made in the second quarter of 2023. Duke Energy Progress submitted a fuel filing to the PSCSC in April 2022 for recovery of $44 million, which included deferrals through February 2022. This amount is expected to be recovered through June 2023. The next filing will be made in the second quarter of 2023.
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 11 $ 10 (b) AROs – nuclear and other 15 7 (b) Deferred fuel and purchased power (h) 1,355 415 (f) 2024 Accrued pension and OPEB (c) 342 374 Yes (g) Nuclear asset securitized balance, net 881 937 2036 Storm cost deferrals (c) 325 19 (f) (b) Hedge costs deferrals (c) 73 77 Yes 2038 Retired generation facilities (c) 94 94 Yes 2044 AMI (c) 30 38 Yes 2032 Customer connect project (c) 82 67 Yes 2037 Costs of removal regulatory asset (c) 221 107 (d) (b) Qualifying facility contract buyouts (c) 81 94 Yes 2034 Other 55 49 (d) (b) Total regulatory assets 3,565 2,288 Less: current portion 1,143 497 Total noncurrent regulatory assets $ 2,422 $ 1,791 Net regulatory liability related to income taxes (c) $ 633 $ 699 (b) DOE Settlement 154 — Other 90 97 (d) (b) Total regulatory liabilities 877 796 Less: current portion 244 98 Total noncurrent regulatory liabilities $ 633 $ 698 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Certain costs earn/pay a return. (e) Earns a debt return/interest once collections begin. (f) Earns commercial paper rate. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (h) Duke Energy Florida submitted a fuel filing to the FPSC in January 2023 for recovery of $795 million, which included the 2022 actual under-recovery of $1.2 billion, offset by projected declining fuel costs in 2023 due to lower natural gas prices. The expected recovery period is April 2023 through March 2024.
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 11 $ 10 (b) AROs – nuclear and other 15 7 (b) Deferred fuel and purchased power (h) 1,355 415 (f) 2024 Accrued pension and OPEB (c) 342 374 Yes (g) Nuclear asset securitized balance, net 881 937 2036 Storm cost deferrals (c) 325 19 (f) (b) Hedge costs deferrals (c) 73 77 Yes 2038 Retired generation facilities (c) 94 94 Yes 2044 AMI (c) 30 38 Yes 2032 Customer connect project (c) 82 67 Yes 2037 Costs of removal regulatory asset (c) 221 107 (d) (b) Qualifying facility contract buyouts (c) 81 94 Yes 2034 Other 55 49 (d) (b) Total regulatory assets 3,565 2,288 Less: current portion 1,143 497 Total noncurrent regulatory assets $ 2,422 $ 1,791 Net regulatory liability related to income taxes (c) $ 633 $ 699 (b) DOE Settlement 154 — Other 90 97 (d) (b) Total regulatory liabilities 877 796 Less: current portion 244 98 Total noncurrent regulatory liabilities $ 633 $ 698 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Certain costs earn/pay a return. (e) Earns a debt return/interest once collections begin. (f) Earns commercial paper rate. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (h) Duke Energy Florida submitted a fuel filing to the FPSC in January 2023 for recovery of $795 million, which included the 2022 actual under-recovery of $1.2 billion, offset by projected declining fuel costs in 2023 due to lower natural gas prices. The expected recovery period is April 2023 through March 2024.
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ — $ 33 Yes (b) Deferred fuel and purchased power 54 38 2023 Accrued pension and OPEB 129 133 (e) Storm cost deferrals 14 2 2023 Hedge costs deferrals 2 5 (b) PISCC and deferred operating expenses (c) 15 16 Yes 2083 AMI 18 24 (b) Customer connect project 54 41 (b) CEP deferral 190 161 Yes (b) Deferred pipeline integrity costs 28 24 Yes (b) Propane caverns 26 — (b) Manufactured gas plant (MGP) — 104 (b) Other 154 126 (b) Total regulatory assets 684 707 Less: current portion 103 72 Total noncurrent regulatory assets $ 581 $ 635 Regulatory Liabilities (a) Net regulatory liability related to income taxes $ 496 $ 602 (b) Costs of removal 9 39 (d) Accrued pension and OPEB 21 21 (e) Provision for rate refunds — 61 Other 107 78 (b) Total regulatory liabilities 633 801 Less: current portion 99 62 Total noncurrent regulatory liabilities $ 534 $ 739 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovery over the life of the associated assets. (e) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ — $ 33 Yes (b) Deferred fuel and purchased power 54 38 2023 Accrued pension and OPEB 129 133 (e) Storm cost deferrals 14 2 2023 Hedge costs deferrals 2 5 (b) PISCC and deferred operating expenses (c) 15 16 Yes 2083 AMI 18 24 (b) Customer connect project 54 41 (b) CEP deferral 190 161 Yes (b) Deferred pipeline integrity costs 28 24 Yes (b) Propane caverns 26 — (b) Manufactured gas plant (MGP) — 104 (b) Other 154 126 (b) Total regulatory assets 684 707 Less: current portion 103 72 Total noncurrent regulatory assets $ 581 $ 635 Regulatory Liabilities (a) Net regulatory liability related to income taxes $ 496 $ 602 (b) Costs of removal 9 39 (d) Accrued pension and OPEB 21 21 (e) Provision for rate refunds — 61 Other 107 78 (b) Total regulatory liabilities 633 801 Less: current portion 99 62 Total noncurrent regulatory liabilities $ 534 $ 739 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovery over the life of the associated assets. (e) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 385 $ 749 Yes (b) Deferred fuel and purchased power 138 158 2023 Accrued pension and OPEB 214 222 (e) Hedge costs deferrals 20 35 (b) PISCC and deferred operating expenses (c) 255 262 Yes (b) Retired generation facilities (c) 34 38 Yes 2030 AMI 15 17 2031 Customer connect project 19 11 (b) Other 44 63 (b) Total regulatory assets 1,124 1,555 Less: current portion 249 277 Total noncurrent regulatory assets $ 875 $ 1,278 Regulatory Liabilities (a) Net regulatory liability related to income taxes $ 840 $ 908 (b) Costs of removal 531 575 (d) Hedge cost deferrals 81 — (b) Accrued pension and OPEB 104 113 (e) Other 85 96 (b) Total regulatory liabilities 1,641 1,692 Less: current portion 187 127 Total noncurrent regulatory liabilities $ 1,454 $ 1,565 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Refunded over the life of the associated assets. (e) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – coal ash $ 385 $ 749 Yes (b) Deferred fuel and purchased power 138 158 2023 Accrued pension and OPEB 214 222 (e) Hedge costs deferrals 20 35 (b) PISCC and deferred operating expenses (c) 255 262 Yes (b) Retired generation facilities (c) 34 38 Yes 2030 AMI 15 17 2031 Customer connect project 19 11 (b) Other 44 63 (b) Total regulatory assets 1,124 1,555 Less: current portion 249 277 Total noncurrent regulatory assets $ 875 $ 1,278 Regulatory Liabilities (a) Net regulatory liability related to income taxes $ 840 $ 908 (b) Costs of removal 531 575 (d) Hedge cost deferrals 81 — (b) Accrued pension and OPEB 104 113 (e) Other 85 96 (b) Total regulatory liabilities 1,641 1,692 Less: current portion 187 127 Total noncurrent regulatory liabilities $ 1,454 $ 1,565 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Refunded over the life of the associated assets. (e) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Piedmont
Public Utilities, General Disclosures [Line Items]
Schedule of Regulatory Assets	The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – nuclear and other $ 27 $ 22 (d) Accrued pension and OPEB (c) 119 82 (g) Vacation accrual 12 12 2023 Derivatives – natural gas supply contracts (f) 168 139 Deferred pipeline integrity costs (c) 93 84 2025 Amounts due from customers 57 85 (e) (b) Other 35 33 (b) Total regulatory assets 511 457 Less: current portion 119 141 Total noncurrent regulatory assets $ 392 $ 316 Regulatory Liabilities (a) Net regulatory liability related to income taxes $ 459 $ 510 (b) Costs of removal (c) 573 572 (d) Other 66 32 (e) (b) Total regulatory liabilities 1,098 1,114 Less: current portion 74 56 Total noncurrent regulatory liabilities $ 1,024 $ 1,058 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovery over the life of the associated assets. (e) Certain costs earn/pay a return. (f) Balance will fluctuate with changes in the market. Current contracts extend into 2031. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities	The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets. December 31, Earns/Pays Recovery/Refund (in millions) 2022 2021 a Return Period Ends Regulatory Assets (a) AROs – nuclear and other $ 27 $ 22 (d) Accrued pension and OPEB (c) 119 82 (g) Vacation accrual 12 12 2023 Derivatives – natural gas supply contracts (f) 168 139 Deferred pipeline integrity costs (c) 93 84 2025 Amounts due from customers 57 85 (e) (b) Other 35 33 (b) Total regulatory assets 511 457 Less: current portion 119 141 Total noncurrent regulatory assets $ 392 $ 316 Regulatory Liabilities (a) Net regulatory liability related to income taxes $ 459 $ 510 (b) Costs of removal (c) 573 572 (d) Other 66 32 (e) (b) Total regulatory liabilities 1,098 1,114 Less: current portion 74 56 Total noncurrent regulatory liabilities $ 1,024 $ 1,058 (a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovery over the life of the associated assets. (e) Certain costs earn/pay a return. (f) Balance will fluctuate with changes in the market. Current contracts extend into 2031. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Schedule of Legal Reserves	The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities (in millions) December 31, 2022 December 31, 2021 Reserves for Environmental Remediation Duke Energy $ 84 $ 88 Duke Energy Carolinas 22 19 Progress Energy 19 23 Duke Energy Progress 8 11 Duke Energy Florida 11 11 Duke Energy Ohio 33 34 Duke Energy Indiana 3 4 Piedmont 7 9
Schedule of Purchase Power Obligations	The following table presents executory purchased power contracts with terms exceeding one year, excluding contracts classified as leases. Minimum Purchase Amount at December 31, 2022 Contract (in millions) Expiration 2023 2024 2025 2026 2027 Thereafter Total Duke Energy Progress (a) 2028-2032 $ 22 $ 21 $ 22 $ 18 $ 19 $ 27 $ 129 Duke Energy Florida (b) 2024-2025 300 267 91 — — — 658 Duke Energy Ohio (c) 2024 55 36 — — — — 91 (a) Contracts represent between 18% and 100% of net plant output. (b) Contracts represent 100% of net plant output. (c) Share of net plant output varies. Excludes PPA with OVEC.
Schedule of Natural Gas Supply Contract Commitments	The following table presents future unconditional purchase obligations under natural gas supply and capacity contracts as of December 31, 2022. (in millions) 2023 2024 2025 2026 2027 Thereafter Total Duke Energy Ohio $ 85 $ 101 $ 85 $ 56 $ 52 $ 616 $ 995 Piedmont 319 313 267 213 203 587 1,902

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lease Costs and Cash Flows Information	The following tables present the components of lease expense. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Operating lease expense (a) $ 229 $ 39 $ 153 $ 83 $ 70 $ 10 $ 19 $ 6 Short-term lease expense (a) 4 — 1 — 1 — 2 — Variable lease expense (a) 61 (1) 60 37 23 — — 1 Finance lease expense Amortization of leased assets (b) 151 6 61 41 20 — — — Interest on lease liabilities (c) 50 32 49 45 4 — 1 — Total finance lease expense 201 38 110 86 24 — 1 — Total lease expense $ 495 $ 76 $ 324 $ 206 $ 118 $ 10 $ 22 $ 7 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Operating lease expense (a) $ 245 $ 43 $ 155 $ 83 $ 72 $ 11 $ 18 $ 7 Short-term lease expense (a) 5 — 2 1 1 — 2 — Variable lease expense (a) 41 17 22 10 12 — — 1 Finance lease expense Amortization of leased assets (b) 219 5 37 18 19 — 1 — Interest on lease liabilities (c) 55 33 48 42 6 — — — Total finance lease expense 274 38 85 60 25 — 1 — Total lease expense $ 565 $ 98 $ 264 $ 154 $ 110 $ 11 $ 21 $ 8 (a) Included in Operations, maintenance and other or, for barges and railcars, Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. (b) Included in Depreciation and amortization on the Consolidated Statements of Operations. (c) Included in Interest Expense on the Consolidated Statements of Operations. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Cash paid for amounts included in the measurement of lease liabilities (a) Operating cash flows from operating leases $ 230 $ 24 $ 118 $ 63 $ 55 $ 2 $ 6 $ 4 Operating cash flows from finance leases 50 32 49 45 4 — 1 — Financing cash flows from finance leases 151 6 61 41 20 — — — Lease assets obtained in exchange for new lease liabilities (non-cash) Operating (b) $ 111 $ 10 $ — $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Cash paid for amounts included in the measurement of lease liabilities (a) Operating cash flows from operating leases $ 245 $ 25 $ 117 $ 62 $ 55 $ 2 $ 6 $ 5 Operating cash flows from finance leases 55 33 48 42 6 — — — Financing cash flows from finance leases 219 5 37 18 19 — 1 — Lease assets obtained in exchange for new lease liabilities (non-cash) Operating (b) $ 182 $ 4 $ 99 $ 99 $ — $ — $ — $ — Finance 322 — 322 322 — — — — (a) No amounts were classified as investing cash flows from operating leases.
Operating Lease Maturities	The following table presents operating lease maturities and a reconciliation of the undiscounted cash flows to operating lease liabilities. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont 2023 $ 225 $ 23 $ 118 $ 64 $ 54 $ 2 $ 6 $ 4 2024 207 21 110 56 54 2 5 4 2025 175 14 96 42 54 2 5 4 2026 161 13 99 45 54 2 4 — 2027 134 9 73 46 27 2 4 — Thereafter 322 37 253 209 44 15 45 1 Total operating lease payments 1,224 117 749 462 287 25 69 13 Less: present value discount (169) (20) (107) (76) (31) (7) (18) — Total operating lease liabilities (a) $ 1,055 $ 97 $ 642 $ 386 $ 256 $ 18 $ 51 $ 13 (a) Certain operating lease payments include renewal options that are reasonably certain to be exercised.
Maturities of Finance Lease Liabilities	The following table presents finance lease maturities and a reconciliation of the undiscounted cash flows to finance lease liabilities. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana 2023 $ 198 $ 38 $ 103 $ 78 $ 25 $ 1 2024 143 38 88 79 9 1 2025 76 38 85 80 5 1 2026 77 38 86 81 5 1 2027 74 38 82 81 1 1 Thereafter 584 427 555 555 — 23 Total finance lease payments 1,152 617 999 954 45 28 Less: amounts representing interest (388) (333) (371) (367) (4) (19) Total finance lease liabilities $ 764 $ 284 $ 628 $ 587 $ 41 $ 9
Balance Sheet Amounts Recorded for Operating and Finance Leases	The following tables contain additional information related to leases. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Classification Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Assets Operating Operating lease ROU assets, net $ 1,042 $ 78 $ 628 $ 370 $ 258 $ 18 $ 49 $ 4 Finance Net property, plant and equipment 810 284 674 590 84 — 6 — Total lease assets $ 1,852 $ 362 $ 1,302 $ 960 $ 342 $ 18 $ 55 $ 4 Liabilities Current Operating Other current liabilities $ 179 $ 14 $ 96 $ 51 $ 45 $ 1 $ 4 $ — Finance Current maturities of long-term debt 153 7 57 35 22 — — — Noncurrent Operating Operating lease liabilities 876 83 546 335 211 17 47 13 Finance Long-Term Debt 611 277 571 552 19 — 9 — Total lease liabilities $ 1,819 $ 381 $ 1,270 $ 973 $ 297 $ 18 $ 60 $ 13 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Classification Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Assets Operating Operating lease ROU assets, net $ 1,136 $ 92 $ 691 $ 389 $ 302 $ 19 $ 53 $ 16 Finance Net property, plant and equipment 950 302 729 627 102 — 7 — Total lease assets $ 2,086 $ 394 $ 1,420 $ 1,016 $ 404 $ 19 $ 60 $ 16 Liabilities Current Operating Other current liabilities $ 184 $ 22 $ 94 $ 50 $ 44 $ 1 $ 4 $ 5 Finance Current maturities of long-term debt 151 6 61 41 20 — — — Noncurrent Operating Operating lease liabilities 940 78 606 350 256 18 50 14 Finance Long-Term Debt 764 283 629 588 41 — 10 — Total lease liabilities $ 2,039 $ 389 $ 1,390 $ 1,029 $ 361 $ 19 $ 64 $ 19
Supplemental Lease Information	December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Weighted average remaining lease term (years) Operating leases 8 10 8 9 6 15 15 1 Finance leases 10 17 12 12 12 — 23 — Weighted average discount rate (a) Operating leases 3.4 % 3.8 % 3.6 % 3.5 % 3.8 % 4.2 % 4.0 % 3.3 % Finance leases 7.7 % 11.5 % 9.1 % 9.1 % 8.0 % — % 11.9 % — % December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Weighted average remaining lease term (years) Operating leases 8 9 8 10 7 16 16 4 Finance leases 10 18 13 13 11 — 24 — Weighted average discount rate (a) Operating leases 3.5 % 3.5 % 3.6 % 3.4 % 3.8 % 4.2 % 4.1 % 3.6 % Finance leases 7.3 % 11.6 % 9.0 % 9.0 % 8.2 % — % 11.9 % — % (a) The discount rate is calculated using the rate implicit in a lease if it is readily determinable. Generally, the rate used by the lessor is not provided to Duke Energy and in these cases the incremental borrowing rate is used. Duke Energy will typically use its fully collateralized incremental borrowing rate as of the commencement date to calculate and record the lease. The incremental borrowing rate is influenced by the lessee’s credit rating and lease term and as such may differ for individual leases, embedded leases or portfolios of leased assets.

Debt and Credit Facilities (Tab

Debt and Credit Facilities (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Schedule of Debt	The following tables summarize outstanding debt and includes debt attributable to the Commercial Renewables Disposal Groups. See Note 2 for further details. December 31, 2022 Weighted Average Duke Duke Duke Duke Duke Interest Duke Energy Progress Energy Energy Energy Energy (in millions) Rate Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unsecured debt, maturing 2023-2082 4.20 % $ 29,585 $ 1,150 $ 2,600 $ — $ 950 $ 1,330 $ 697 $ 3,390 Secured debt, maturing 2023-2052 4.11 % 5,632 1,317 2,383 1,155 1,228 — — — First mortgage bonds, maturing 2023-2052 (a) 3.89 % 32,645 11,306 16,350 8,776 7,576 1,850 3,138 — Finance leases, maturing 2023-2051 (b) 7.90 % 764 284 628 587 41 — 9 — Tax-exempt bonds, maturing 2027-2046 (c) 3.84 % 1,331 — 500 500 — 77 352 — Notes payable and commercial paper (d) 4.50 % 4,582 — — — — — — — Money pool/intercompany borrowings — 1,533 993 389 605 522 585 514 Fair value hedge carrying value adjustment (5) — — — — — — — Unamortized debt discount and premium, net (e) 1,016 (21) (40) (23) (16) (25) (17) (9) Unamortized debt issuance costs (f) (383) (70) (132) (59) (70) (12) (22) (18) Total debt 4.09 % $ 75,167 $ 15,499 $ 23,282 $ 11,325 $ 10,314 $ 3,742 $ 4,742 $ 3,877 Short-term notes payable and commercial paper (3,952) — — — — — — — Short-term money pool/intercompany borrowings — (1,233) (843) (238) (605) (497) (435) (514) Current maturities of long-term debt (g) (4,154) (1,018) (697) (369) (328) (475) (303) (45) Total long-term debt (g) $ 67,061 $ 13,248 $ 21,742 $ 10,718 $ 9,381 $ 2,770 $ 4,004 $ 3,318 (a) Substantially all electric utility property is mortgaged under mortgage bond indentures. (b) Duke Energy includes $164 million of finance lease purchase accounting adjustments related to Duke Energy Florida related to PPAs that are not accounted for as finance leases in their respective financial statements because of grandfathering provisions in GAAP. (c) Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility. (d) Includes $625 million classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper program was 15 days. (e) Duke Energy includes $1,057 million and $85 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively. (f) Duke Energy includes $27 million in purchase accounting adjustments primarily related to the merger with Progress Energy. (g) Refer to Note 18 for additional information on amounts from consolidated VIEs. December 31, 2021 Weighted Average Duke Duke Duke Duke Duke Interest Duke Energy Progress Energy Energy Energy Energy (in millions) Rate Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unsecured debt, maturing 2022-2082 3.71 % $ 24,564 $ 1,150 $ 2,250 $ — $ 150 $ 1,330 $ 700 $ 2,990 Secured debt, maturing 2022-2052 2.50 % 5,584 1,094 2,397 1,120 1,278 — — — First mortgage bonds, maturing 2022-2051 (a) 3.87 % 31,026 10,507 15,450 8,375 7,075 1,850 3,219 — Finance leases, maturing 2022-2051 (b) 5.81 % 915 289 690 629 61 — 10 — Tax-exempt bonds, maturing 2027-2041 (c) 0.65 % 360 — 48 48 — 27 285 — Notes payable and commercial paper (d) 0.35 % 3,929 — — — — — — — Money pool/intercompany borrowings — 526 2,959 322 199 128 150 518 Fair value hedge carrying value adjustment 4 4 — — — — — — Unamortized debt discount and premium, net (e) 1,119 (21) (34) (19) (14) (27) (18) (6) Unamortized debt issuance costs (f) (362) (67) (128) (54) (68) (13) (23) (16) Total debt 3.50 % $ 67,139 $ 13,482 $ 23,632 $ 10,421 $ 8,681 $ 3,295 $ 4,323 $ 3,486 Short-term notes payable and commercial paper (3,304) — — — — — — — Short-term money pool/intercompany borrowings — (226) (2,809) (172) (199) (103) — (518) Current maturities of long-term debt (g) (3,387) (362) (1,082) (556) (76) — (84) — Total long-term debt (g) $ 60,448 $ 12,894 $ 19,741 $ 9,693 $ 8,406 $ 3,192 $ 4,239 $ 2,968 (a) Substantially all electric utility property is mortgaged under mortgage bond indentures. (b) Duke Energy includes $256 million of finance lease purchase accounting adjustments related to Duke Energy Florida related to PPAs that are not accounted for as finance leases in their respective financial statements because of grandfathering provisions in GAAP. (c) Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility. (d) Includes $625 million that was classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper programs was 15 days. (e) Duke Energy includes $1,121 million and $100 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively. (f) Duke Energy includes $29 million in purchase accounting adjustments primarily related to the merger with Progress Energy. (g) Refer to Note 18 for additional information on amounts from consolidated VIEs. The following table shows the significant components of Current maturities of Long-Term Debt on the Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings. (in millions) Maturity Date Interest Rate December 31, 2022 Unsecured Debt Duke Energy (Parent) April 2023 2.875 % $ 350 Duke Energy (Parent) (a) June 2023 3.469 % 500 Duke Energy (Parent) October 2023 3.950 % 400 Duke Energy Ohio (a) October 2023 4.272 % 150 Duke Energy Indiana (a) October 2023 4.118 % 300 First Mortgage Bonds Duke Energy Carolinas March 2023 2.500 % 500 Duke Energy Carolinas March 2023 3.050 % 500 Duke Energy Progress September 2023 3.375 % 300 Duke Energy Ohio September 2023 3.800 % 300 Other (b) 854 Current maturities of long-term debt $ 4,154 (a) Debt has a floating interest rate. (b) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities. December 31, 2022 and 2021 Duke Duke Duke Duke Duke Energy Energy Energy Energy (in millions) Energy Carolinas Progress Ohio Indiana Tax-exempt bonds $ 312 $ — $ — $ 27 $ 285 Commercial paper (a) 625 300 150 25 150 Total $ 937 $ 300 $ 150 $ 52 $ 435 (a) Progress Energy amounts are equal to Duke Energy Progress amounts.
Schedule of Maturities of Long-term Debt	The following table shows the annual maturities of long-term debt for the next five years and thereafter. Amounts presented exclude short-term notes payable, commercial paper and money pool borrowings and debt issuance costs for the Subsidiary Registrants. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy (a) Carolinas Energy Progress Florida Ohio Indiana Piedmont 2023 $ 4,154 $ 1,018 $ 697 $ 369 $ 328 $ 475 $ 303 $ 45 2024 3,216 19 939 72 867 — 4 40 2025 4,322 491 1,040 975 65 245 4 205 2026 2,682 621 345 279 66 45 4 40 2027 3,203 323 947 233 714 102 177 300 Thereafter 52,999 11,884 18,642 9,238 7,753 2,415 3,853 2,760 Total long-term debt, including current maturities $ 70,576 $ 14,356 $ 22,610 $ 11,166 $ 9,793 $ 3,282 $ 4,345 $ 3,390 (a) Excludes $1,169 million in purchase accounting adjustments related to the Progress Energy merger and the Piedmont acquisition.
Schedule of Long-term Debt Instruments	The following tables summarize significant debt issuances (in millions). Year Ended December 31, 2022 Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Florida Piedmont Unsecured Debt May 2022 (a) May 2052 5.050 % $ 400 $ — $ — $ — $ — $ 400 June 2022 (b) June 2028 4.750 % 645 645 — — — — June 2022 (b) June 2034 5.306 % 537 537 — — — — August 2022 (c) March 2028 4.300 % 900 900 — — — — August 2022 (c) August 2032 4.500 % 1,150 1,150 — — — — August 2022 (c) August 2052 5.000 % 1,150 1,150 — — — December 2022 (d) December 2025 5.000 % 500 500 — — — — December 2022 (d) December 2027 5.000 % 500 500 — — — — First Mortgage Bonds March 2022 (e) March 2032 2.850 % 500 — 500 — — — March 2022 (e) March 2052 3.550 % 650 — 650 — — — March 2022 (e) April 2032 3.400 % 500 — — 500 — — March 2022 (e) April 2052 4.000 % 400 — — 400 — — November 2022 (f) November 2052 5.950 % 500 — — — 500 — Tax-exempt Bonds June 2022 (g) September 2030 4.000 % 168 168 — — — — June 2022 (g) November 2039 4.250 % 234 234 — — — — September 2022 (h) October 2046 3.300 % 200 — — 200 — September 2022 (i) October 2046 3.700 % 210 — — 210 — September 2022 (i) October 2046 4.000 % 42 — — 42 — Total issuances $ 9,186 $ 5,784 $ 1,150 $ 1,352 $ 500 $ 400 (a) Debt issued to repay a portion of outstanding intercompany short-term debt and for general corporate purposes. (b) Duke Energy (Parent) issued 600 million euros aggregate principal amount of 3.10% senior notes due June 2028 and 500 million euros aggregate principal amount of 3.85% senior notes due June 2034. Debt issued to repay a $500 million debt maturity, pay down short-term debt and for general corporate purposes. Duke Energy's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. See Note 15 for additional information. (c) Debt issued to repay a portion of short-term debt and for general corporate purposes. (d) Proceeds will be used to repay a portion of commercial paper and for general corporate purposes. (e) Debt issued to finance or refinance, in whole or in part, existing or new eligible projects under the sustainable financing framework. (f) Debt issued to repay a portion of outstanding intercompany short-term debt and for general company purposes. (g) Debt issued to refund the Ohio Air Quality Development Revenue Refunding bonds, previously held in treasury, which were used to finance or refinance portions of certain solid waste disposal facilities. The mandatory purchase date of these bonds is June 1, 2027. (h) Debt issued to provide funds to refund the prior bonds, which were used to finance or refinance portions of certain air and water pollution control equipment and solid waste disposal equipment. The mandatory purchase date of these bonds is October 1, 2026. (i) Debt issued to provide funds to refund the prior bonds, which were used to finance or refinance portions of certain air and water pollution control equipment and solid waste disposal equipment. The mandatory purchase date of these bonds is October 1, 2030. Year Ended December 31, 2021 Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Florida Piedmont Unsecured Debt March 2021 a) March 2031 2.500 % $ 350 $ — $ — $ — $ — $ 350 June 2021 (b)(c) June 2023 0.299 % 500 500 — — — — June 2021 (c) June 2031 2.550 % 1,000 1,000 — — — — June 2021 (c) June 2041 3.300 % 750 750 — — — — June 2021 (c) June 2051 3.500 % 750 750 — — — — September 2021 (d) January 2082 3.250 % 500 500 — — — — Secured Debt November 2021 (e) July 2031 1.679 % 100 — 100 — — — November 2021 (e) July 2041 2.617 % 137 — 137 — — — November 2021 (e) July 2028 1.295 % 221 — — 221 — — November 2021 (e) July 2037 2.387 % 352 — — 352 — — November 2021 (e) July 2041 2.799 % 197 — — 197 — — First Mortgage Bonds April 2021 (f) April 2031 2.550 % 550 — 550 — — — April 2021 (f) April 2051 3.450 % 450 — 450 — — — August 2021 (g) August 2031 2.000 % 650 — — 650 — — August 2021 (g) August 2051 2.900 % 450 — — 450 — — December 2021 (h) December 2031 2.400 % 650 — — — 650 — December 2021 (h) December 2051 3.000 % 500 — — — 500 — Total issuances $ 8,107 $ 3,500 $ 1,237 $ 1,870 $ 1,150 $ 350 (a) Debt issued to repay at maturity $160 million senior unsecured notes due June 2021, pay down short-term debt and for general corporate purposes. (b) Debt has a floating interest rate. (c) Debt issued to repay $1.75 billion of Duke Energy (Parent) debt maturities, to repay a portion of short-term debt and for general corporate purposes. (d) Debt issued to repay in October 2021 $500 million of Duke Energy (Parent) unsecured notes. The interest rate resets every five years. (e) Debt issued to finance the North Carolina portion of storm restoration expenditures related to Hurricane Florence, Hurricane Michael, Hurricane Dorian and Winter Storm Diego. (f) Debt issued to repay at maturity $500 million first mortgage bonds due June 2021, pay down short-term debt and for general company purposes. (g) Debt issued to repay at maturity a total of $600 million first mortgage bonds due September 2021, pay down short-term debt and for general company purposes. (h) Proceeds were used to finance or refinance, in whole or in part, existing or new eligible projects under the sustainable financing framework.
Schedule of Line of Credit Facilities	The table below includes the current borrowing sublimits and available capacity under these credit facilities. December 31, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Energy Energy Energy Energy Energy (in millions) Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Facility size (a) $ 9,000 $ 2,375 $ 1,925 $ 800 $ 1,150 $ 900 $ 1,050 $ 800 Reduction to backstop issuances Commercial paper (b) (3,685) 463 (1,533) (389) (605) (522) (585) (514) Outstanding letters of credit (40) (27) (4) (2) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity $ 5,194 $ 2,811 $ 388 $ 409 $ 538 $ 378 $ 384 $ 286 (a) Represents the sublimit of each borrower. (b) Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies in the Consolidated Balance Sheets.

Joint Ownership of Generating_2

Joint Ownership of Generating and Transmission Facilities (Tables)	12 Months Ended
	Dec. 31, 2022
Joint Ownership Of Generating And Transmission Facilities [Abstract]
Schedule Joint Ownership of Generating and Transmission Facilities	The following table presents the Duke Energy Registrants' interest of jointly owned plant or facilities and amounts included on the Consolidated Balance Sheets. All facilities are operated by the Duke Energy Registrants and are included in the Electric Utilities and Infrastructure segment. December 31, 2022 Construction Ownership Property, Plant Accumulated Work in (in millions except for ownership interest) Interest and Equipment Depreciation Progress Duke Energy Carolinas Catawba (units 1 and 2) (a) 19.25 % $ 1,047 $ 546 $ 32 W.S. Lee CC (b) 87.27 % 613 86 48 Duke Energy Indiana Gibson (unit 5) (c) 50.05 % 450 241 2 Vermillion (d) 62.50 % 182 113 1 Transmission and local facilities (c) Various 6,718 1,510 157 (a) Jointly owned with North Carolina Municipal Power Agency Number 1, NCEMC and PMPA. (b) Jointly owned with NCEMC. (c) Jointly owned with WVPA and IMPA. (d) Jointly owned with WVPA.

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Asset Retirement Obligations by Category	The following table presents the AROs recorded on the Consolidated Balance Sheets. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Decommissioning of nuclear power facilities (a) $ 7,261 $ 3,009 $ 4,217 $ 3,948 $ 270 $ — $ — $ — Closure of ash impoundments 5,176 2,309 1,862 1,833 29 95 911 — Other 291 64 102 42 59 59 40 26 Total asset retirement obligation $ 12,728 $ 5,382 $ 6,181 $ 5,823 $ 358 $ 154 $ 951 $ 26 Less: Current portion 773 261 289 288 1 17 207 — Total noncurrent asset retirement obligation $ 11,955 $ 5,121 $ 5,892 $ 5,535 $ 357 $ 137 $ 744 $ 26 (a) Duke Energy amount includes purchase accounting adjustments related to the merger with Progress Energy.
Public Utilities General Disclosures	The following table summarizes information about the most recent site-specific nuclear decommissioning cost studies. Decommissioning costs are stated in 2018 or 2019 dollars, depending on the year of the cost study, and include costs to decommission plant components not subject to radioactive contamination. Annual Funding Decommissioning (in millions) Requirement (a) Costs (a) Year of Cost Study Duke Energy $ 10 $ 9,105 2018 or 2019 Duke Energy Carolinas (b)(c) — 4,365 2018 Duke Energy Progress (d) 10 4,181 2019 Duke Energy Florida (e) — 559 N/A (a) Amount represents annual funding requirement for the current fiscal year. Amounts for Progress Energy equal the sum of Duke Energy Progress and Duke Energy Florida. (b) Decommissioning costs for Duke Energy Carolinas reflects its ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors. (c) Duke Energy Carolinas' site-specific nuclear decommissioning cost study completed in 2018 was filed with the NCUC and PSCSC in 2019. A new funding study was also completed and filed with the NCUC and PSCSC in 2019. (d) Duke Energy Progress' site-specific nuclear decommissioning cost study completed in 2019 was filed with the NCUC and PSCSC in March 2020. Duke Energy Progress also completed a funding study, which was filed with the NCUC and PSCSC in July 2020. In October 2021, Duke Energy Progress filed the 2019 nuclear decommissioning cost study with the FERC, as well as a revised rate schedule for decommissioning expense to be collected from wholesale customers. The FERC accepted the filing, as filed on December 9, 2021. (e) During 2019, Duke Energy Florida reached an agreement to transfer decommissioning work for Crystal River Unit 3 to a third party and decommissioning costs are based on the agreement with this third party rather than a cost study. Regulatory approval was received from the NRC and the FPSC in April 2020 and August 2020, respectively. The following table presents the fair value of NDTF assets legally restricted for purposes of settling AROs associated with nuclear decommissioning. Duke Energy Florida entered into an agreement with a third party to decommission Crystal River Unit 3 and was granted an exemption from the NRC, which allows for use of the NDTF for all aspects of nuclear decommissioning. The entire balance of Duke Energy Florida's NDTF may be applied toward license termination, spent fuel and site restoration costs incurred to decommission Crystal River Unit 3 and is excluded from the table below. See Note 17 for additional information related to the fair value of the Duke Energy Registrants' NDTFs. December 31, (in millions) 2022 2021 Duke Energy $ 7,466 $ 8,933 Duke Energy Carolinas 4,208 5,068 Duke Energy Progress 3,258 3,865 Unit Year of Expiration Duke Energy Carolinas Catawba Units 1 and 2 2043 McGuire Unit 1 2041 McGuire Unit 2 2043 Oconee Units 1 and 2 2033 Oconee Unit 3 2034 Duke Energy Progress Brunswick Unit 1 2036 Brunswick Unit 2 2034 Harris 2046 Robinson 2030
Rollforward Schedule of Asset Retirement Obligations	The following tables present changes in the liability associated with AROs. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2020 $ 12,854 $ 5,350 $ 6,149 $ 5,635 $ 514 $ 111 $ 1,176 $ 20 Accretion expense (a) 504 242 229 212 17 4 35 1 Liabilities settled (b) (613) (210) (324) (214) (110) (3) (77) — Liabilities incurred in the current year 14 8 6 — 6 — — — Revisions in estimates of cash flows (c) (159) (89) 52 42 10 24 (147) 1 Balance at December 31, 2021 12,600 5,301 6,112 5,675 437 136 987 22 Accretion expense (a) 501 242 229 215 14 6 30 1 Liabilities settled (b) (680) (234) (334) (228) (106) (13) (98) — Liabilities incurred in the current year 22 — 18 — 18 — 5 — Revisions in estimates of cash flows (c) 285 73 156 161 (5) 25 27 3 Balance at December 31, 2022 $ 12,728 $ 5,382 $ 6,181 $ 5,823 $ 358 $ 154 $ 951 $ 26 (a) Substantially all accretion expense for the years ended December 31, 2022, and 2021, relates to Duke Energy’s regulated operations and has been deferred in accordance with regulatory accounting treatment. (b) Amounts primarily relate to ash impoundment closures and nuclear decommissioning. (c) The amounts recorded represent the discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The increases in 2022 primarily relate to higher unit costs associated with basin closure and routine maintenance. The decreases in 2021 primarily relate to revised basin closure cost estimates, partially offset by increases related to new closure plan approvals, post closure maintenance and beneficiation costs.

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows. Years Ended December 31, 2022 2021 2020 Duke Energy 3.0 % 2.9 % 3.0 % Duke Energy Carolinas 2.7 % 2.7 % 2.8 % Progress Energy 3.2 % 3.1 % 3.2 % Duke Energy Progress 3.0 % 3.0 % 3.1 % Duke Energy Florida 3.5 % 3.3 % 3.3 % Duke Energy Ohio 2.9 % 2.9 % 2.9 % Duke Energy Indiana 3.6 % 3.6 % 3.5 % Piedmont 2.1 % 2.1 % 2.3 % The following tables summarize the property, plant and equipment for Duke Energy and its subsidiary registrants. December 31, 2022 Average Remaining Duke Duke Duke Duke Duke Useful Life Duke Energy Progress Energy Energy Energy Energy (in millions) (Years) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Land $ 2,232 $ 565 $ 993 $ 496 $ 497 $ 230 $ 124 $ 295 Plant – Regulated Electric generation, distribution and transmission 39 126,016 46,640 55,872 33,336 22,536 6,900 16,604 — Natural gas transmission and distribution 56 13,174 — — — — 3,773 — 9,401 Other buildings and improvements 40 2,537 973 647 341 306 398 336 183 Plant – Nonregulated Other buildings and improvements 10 369 — — — — — — — Nuclear fuel 3,081 1,723 1,358 1,358 — — — — Equipment 13 2,959 710 936 567 369 441 356 125 Construction in process 7,381 2,671 3,073 1,317 1,756 375 381 478 Other 15 6,090 1,368 1,943 1,460 476 380 320 387 Total property, plant and equipment (a) 163,839 54,650 64,822 38,875 25,940 12,497 18,121 10,869 Total accumulated depreciation – regulated (b)(c) (50,544) (18,669) (20,584) (14,201) (6,377) (3,250) (6,021) (2,081) Total accumulated depreciation – nonregulated (d) (1,556) — — — — — — — Facilities to be retired, net 9 — — — — — — 9 Total net property, plant and equipment $ 111,748 $ 35,981 $ 44,238 $ 24,674 $ 19,563 $ 9,247 $ 12,100 $ 8,797 (a) Includes finance leases of $816 million, $335 million, $674 million, $590 million, $84 million and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $233 million, $81 million and $152 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,683 million, $934 million, $749 million and $749 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $7 million, $51 million and $4 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of ($1 million) at Duke Energy. December 31, 2021 Average Remaining Duke Duke Duke Duke Duke Useful Life Duke Energy Progress Energy Energy Energy Energy (in millions) (Years) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Land $ 2,145 $ 543 $ 957 $ 482 $ 475 $ 219 $ 122 $ 279 Plant – Regulated Electric generation, distribution and transmission 40 120,855 44,910 53,447 32,417 21,030 6,573 15,925 — Natural gas transmission and distribution 54 12,079 — — — — 3,347 — 8,732 Other buildings and improvements 37 1,921 550 514 228 286 381 321 155 Plant – Nonregulated Other buildings and improvements 11 401 — — — — — — — Nuclear fuel 3,181 1,856 1,325 1,325 — — — — Equipment 13 2,659 614 791 497 294 403 262 122 Construction in process 5,979 2,078 2,297 954 1,343 515 460 262 Other 14 5,276 1,323 1,563 1,115 437 287 253 368 Total property, plant and equipment (a) 154,496 51,874 60,894 37,018 23,865 11,725 17,343 9,918 Total accumulated depreciation – regulated (b)(c) (47,611) (17,854) (19,214) (13,387) (5,819) (3,106) (5,583) (1,899) Total accumulated depreciation – nonregulated (d) (1,493) — — — — — — — Facilities to be retired, net 144 102 26 26 — 6 — 11 Total net property, plant and equipment $ 105,536 $ 34,122 $ 41,706 $ 23,657 $ 18,046 $ 8,625 $ 11,760 $ 8,030 (a) Includes finance leases of $958 million, $335 million, $729 million, $627 million, $102 million, and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $178 million, $45 million and $133 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,799 million, $1,064 million, $735 million and $735 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $9 million, $33 million, and $3 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of ($1 million) at Duke Energy. Duke Energy continues to execute on its business transformation strategy, including the evaluation of in-office work policies considering the experience with the COVID-19 pandemic and also workforce realignment of roles and responsibilities. In May 2021, Duke Energy management approved the sale of certain properties and entered into an agreement to exit certain leased space on December 31, 2021. The sale of the properties is subject to abandonment accounting and resulted in an impairment charge. Additionally, the exit of the leased space resulted in the impairment of related furniture, fixtures and equipment. During the year ended December 31, 2021, Duke Energy recorded a pretax charge to earnings of $192 million on the Consolidated Statements of Operations, which includes $133 million within Impairment of assets and other charges, $42 million within Operations, maintenance and other and $17 million within Depreciation and amortization.
Schedule of Capitalized Interest	The following table presents capitalized interest, which includes the debt component of AFUDC. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy $ 118 $ 66 $ 96 Duke Energy Carolinas 50 29 28 Progress Energy 26 20 17 Duke Energy Progress 19 14 12 Duke Energy Florida 7 6 5 Duke Energy Ohio 14 20 26 Duke Energy Indiana (a) 3 (17) 10 Piedmont 4 9 8 (a) In 2021, Duke Energy Indiana is primarily compromised of ($24 million) of PISCC amortization, which is partially offset by $7 million of the debt component of AFUDC.

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	The following tables show the carrying amount and accumulated amortization of intangible assets included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets of the Duke Energy Registrants at December 31, 2022, and 2021. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Emission allowances $ 8 $ — $ 5 $ 2 $ 3 $ — $ 2 $ — Renewable energy certificates 210 84 124 124 — 2 — — Other 55 — 4 1 3 — — 22 Total gross carrying amounts 273 84 133 127 6 2 2 22 Accumulated amortization – other (8) — (1) — (1) — — (2) Total accumulated amortization (8) — (1) — (1) — — (2) Total intangible assets, net $ 265 $ 84 $ 132 $ 127 $ 5 $ 2 $ 2 $ 20 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Emission allowances $ 8 $ — $ 5 $ 2 $ 3 $ — $ 2 $ — Renewable energy certificates 204 73 131 131 — — — — Natural gas, coal and power contracts 24 — — — — — 24 — Other 28 — — — — — — — Total gross carrying amounts 264 73 136 133 3 — 26 — Accumulated amortization – natural gas, coal and power contracts (24) — — — — — (24) — Accumulated amortization – other (4) — — — — — — — Total accumulated amortization (28) — — — — — (24) — Total intangible assets, net $ 236 $ 73 $ 136 $ 133 $ 3 $ — $ 2 $ —

Investments in Unconsolidated_2

Investments in Unconsolidated Affiliates (Tables)	12 Months Ended
	Dec. 31, 2022
Investments In Unconsolidated Affiliates [Line Items]
Investments in Equity Method Unconsolidated Affiliates	The following table presents Duke Energy’s investments in unconsolidated affiliates accounted for under the equity method, as well as the respective equity in earnings, by segment, for periods presented in this filing. Years Ended December 31, 2022 2021 2020 Equity in Equity in Equity in earnings earnings earnings (in millions) Investments (losses) Investments (losses) (losses) Electric Utilities and Infrastructure $ 99 $ 7 $ 104 $ 7 $ (1) Gas Utilities and Infrastructure 240 21 231 8 (2,017) Other 116 85 122 47 13 Total $ 455 $ 113 $ 457 $ 62 $ (2,005)
ACP
Investments In Unconsolidated Affiliates [Line Items]
Investments in Equity Method Unconsolidated Affiliates	For the year ended December 31, 2020, Duke Energy's investment in ACP met the requirements of S-X Rule 4-08(g) to provide summarized financial information. The following table provides summary information for ACP as required under S-X Rule 1-02(bb) for the period of significance in Duke Energy's consolidated statements of operations. For the years ended December 31, 2022, and 2021, there were no investments that met the significance requirements. Year Ended December 31, 2020 Net revenues $ — Operating loss (4,612) Net loss (4,512) Net loss attributable to Duke Energy $ (2,121)

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions, Other Revenue and Expense	Material amounts related to transactions with related parties included in the Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 838 $ 894 $ 753 Indemnification coverages (b) 28 24 20 Joint Dispatch Agreement (JDA) revenue (c) 109 41 25 JDA expense (c) 600 207 114 Intercompany natural gas purchases (d) 12 11 15 Progress Energy Corporate governance and shared service expenses (a) $ 818 $ 856 $ 715 Indemnification coverages (b) 43 41 36 JDA revenue (c) 600 207 114 JDA expense (c) 109 41 25 Intercompany natural gas purchases (d) 76 75 75 Duke Energy Progress Corporate governance and shared service expenses (a) $ 469 $ 504 $ 420 Indemnification coverages (b) 20 19 17 JDA revenue (c) 600 207 114 JDA expense (c) 109 41 25 Intercompany natural gas purchases (d) 76 75 75 Duke Energy Florida Corporate governance and shared service expenses (a) $ 349 $ 352 $ 295 Indemnification coverages (b) 23 22 19 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 334 $ 329 $ 326 Indemnification coverages (b) 5 4 4 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 447 $ 409 $ 401 Indemnification coverages (b) 8 8 8 Piedmont Corporate governance and shared service expenses (a) $ 155 $ 139 $ 140 Indemnification coverages (b) 3 3 3 Intercompany natural gas sales (d) 88 86 90 Natural gas storage and transportation costs (e) 23 22 23 (a) The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other on the Consolidated Statements of Operations and Comprehensive Income. (b) The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Consolidated Statements of Operations and Comprehensive Income. (c) Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Consolidated Statements of Operations and Comprehensive Income. (d) Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Consolidated Statements of Operations and Comprehensive Income. These intercompany revenues and expenses are eliminated in consolidation. (e) Piedmont has related party transactions as a customer of its equity method investments in Pine Needle, Hardy Storage, and Cardinal natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Consolidated Statements of Operations and Comprehensive Income. Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont December 31, 2022 Intercompany income tax receivable $ — $ 95 $ 36 $ 17 $ — $ — $ — Intercompany income tax payable 37 — — — 17 18 38 December 31, 2021 Intercompany income tax receivable $ — $ — $ — $ 40 $ 19 $ — $ — Intercompany income tax payable 62 — 84 — — 10 27

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Outstanding Derivative Positions	The following tables show notional amounts of outstanding derivatives related to interest rate risk. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 500 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,979 1,250 800 500 300 300 27 Total notional amount $ 3,479 $ 1,250 $ 800 $ 500 $ 300 $ 300 $ 27 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Indiana Ohio Cash flow hedges $ 2,415 $ — $ — $ — $ — $ — Undesignated contracts 1,177 350 500 500 300 27 Total notional amount $ 3,592 $ 350 $ 500 $ 500 $ 300 $ 27 The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 14,086 — — — 1,820 12,266 — Natural gas (millions of Dth) 909 307 292 292 — 11 299 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 12,369 — — — 1,681 10,688 — Natural gas (millions of Dth) 823 264 215 215 — 8 336 The following table shows Duke Energy's outstanding derivatives related to foreign currency risk. There were no fair value hedges in 2021. December 31, 2022 Receive Fair Value Pay Notional Notional Receive Hedge Gain (Loss) (a) (in millions) Pay Rate (in millions) Rate Maturity Date (in millions) Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ (3) 537 5.31 % 500 euros 3.85 % June 2034 (2) Total notional amount $ 1,182 1,100 euros $ (5) (a) Amounts are recorded in Other Income and expenses, net on the Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Consolidated Statements of Comprehensive Income for amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded.
Location and Fair Value of Derivatives Recognized in the Consolidated Balance Sheets	The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown. Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 265 $ 132 $ 99 $ 99 $ — $ 5 $ 29 $ — Noncurrent 213 104 108 108 — — — — Total Derivative Assets – Commodity Contracts $ 478 $ 236 $ 207 $ 207 $ — $ 5 $ 29 $ — Interest Rate Contracts Designated as Hedging Instruments Current $ 101 $ — $ — $ — $ — $ — $ — $ — Not Designated as Hedging Instruments Current $ 228 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Noncurrent 29 — — — — — — — Total Derivative Assets – Interest Rate Contracts $ 358 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets $ 836 $ 330 $ 248 $ 230 $ 17 $ 5 $ 110 $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 175 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Noncurrent 202 31 30 30 — — — 141 Total Derivative Liabilities – Commodity Contracts $ 377 $ 127 $ 66 $ 48 $ 19 $ — $ 16 $ 168 Interest Rate Contracts Not Designated as Hedging Instruments Noncurrent 2 — — — — 2 — — Total Derivative Liabilities – Interest Rate Contracts $ 2 $ — $ — $ — $ — $ 2 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 40 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 58 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 437 $ 127 $ 66 $ 48 $ 19 $ 2 $ 16 $ 168 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 199 $ 99 $ 72 $ 72 $ — $ 2 $ 23 $ 3 Noncurrent 113 63 50 50 — — — — Total Derivative Assets – Commodity Contracts $ 312 $ 162 $ 122 $ 122 $ — $ 2 $ 23 $ 3 Interest Rate Contracts Designated as Hedging Instruments Current $ 3 $ — $ — $ — $ — $ — $ — $ — Noncurrent 3 — — — — — — — Not Designated as Hedging Instruments Current $ 2 $ — $ 2 $ 2 $ — $ — $ — $ — Total Derivative Assets – Interest Rate Contracts $ 8 $ — $ 2 $ 2 $ — $ — $ — $ — Total Derivative Assets $ 320 $ 162 $ 124 $ 124 $ — $ 2 $ 23 $ 3 Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Not Designated as Hedging Instruments Current $ 72 $ 18 $ 19 $ 5 $ 14 $ — $ 13 $ 21 Noncurrent 132 9 5 5 — — — 118 Total Derivative Liabilities – Commodity Contracts $ 204 $ 27 $ 24 $ 10 $ 14 $ — $ 13 $ 139 Interest Rate Contracts Designated as Hedging Instruments Current $ 75 $ — $ — $ — $ — $ — $ — $ — Noncurrent 21 — — — — — — — Not Designated as Hedging Instruments Current 10 8 — — — 1 — — Noncurrent 18 — — — — 4 14 — Total Derivative Liabilities – Interest Rate Contracts $ 124 $ 8 $ — $ — $ — $ 5 $ 14 $ — Total Derivative Liabilities $ 328 $ 35 $ 24 $ 10 $ 14 $ 5 $ 27 $ 139
Offsetting Assets	The following tables present the line items on the Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 594 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Gross amounts offset (64) (33) (30) (30) — — — — Net amounts presented in Current Assets: Other $ 530 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 242 $ 104 $ 108 $ 108 $ — $ — $ — $ — Gross amounts offset (97) (40) (57) (57) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 145 $ 64 $ 51 $ 51 $ — $ — $ — $ — Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 204 $ 99 $ 74 $ 74 $ — $ 2 $ 23 $ 3 Gross amounts offset (25) (16) (9) (9) — — — — Net amounts presented in Current Assets: Other $ 179 $ 83 $ 65 $ 65 $ — $ 2 $ 23 $ 3 Noncurrent Gross amounts recognized $ 116 $ 63 $ 50 $ 50 $ — $ — $ — $ — Gross amounts offset (23) (15) (8) (8) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 93 $ 48 $ 42 $ 42 $ — $ — $ — $ —
Offsetting Liabilities	Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 193 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Gross amounts offset (49) (15) (18) (18) — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Gross amounts offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141 Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 157 $ 26 $ 19 $ 5 $ 14 $ 1 $ 13 $ 21 Gross amounts offset (11) (6) (5) (5) — — — — Net amounts presented in Current Liabilities: Other $ 146 $ 20 $ 14 $ — $ 14 $ 1 $ 13 $ 21 Noncurrent Gross amounts recognized $ 171 $ 9 $ 5 $ 5 $ — $ 4 $ 14 $ 118 Gross amounts offset (12) (8) (5) (5) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 159 $ 1 $ — $ — $ — $ 4 $ 14 $ 118
Derivative Contracts with Contingent Credit Features	The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit risk-related payment provisions. December 31, 2022 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Aggregate fair value of derivatives in a net liability position $ 141 $ 86 $ 55 $ 48 $ 7 Fair value of collateral already posted — — — — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 141 86 55 48 7 December 31, 2021 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Aggregate fair value of derivatives in a net liability position $ 32 $ 18 $ 14 $ 10 $ 4 Fair value of collateral already posted — — — — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 32 18 14 10 4

Investments in Debt and Equit_2

Investments in Debt and Equity Securities (Tables)	12 Months Ended
	Dec. 31, 2022
Investment [Line Items]
Summary of Investments in Debt and Equity Securities	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 215 $ — $ — $ 160 Equity securities 3,658 105 5,871 4,905 43 7,350 Corporate debt securities 1 85 641 39 6 829 Municipal bonds — 39 330 14 1 314 U.S. government bonds 2 112 1,423 31 12 1,568 Other debt securities — 18 156 3 1 180 Total NDTF Investments $ 3,661 $ 359 $ 8,636 $ 4,992 $ 63 $ 10,401 Other Investments Cash and cash equivalents $ — $ — $ 22 $ — $ — $ 36 Equity securities 21 16 128 36 — 156 Corporate debt securities — 12 84 2 1 119 Municipal bonds — 3 78 3 1 80 U.S. government bonds — 2 62 — — 56 Other debt securities — 3 41 — 1 45 Total Other Investments $ 21 $ 36 $ 415 $ 41 $ 3 $ 492 Total Investments $ 3,682 $ 395 $ 9,051 $ 5,033 $ 66 $ 10,893
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 201 $ 724 $ 366 Realized losses 316 141 174 AFS: Realized gains 28 56 96 Realized losses 151 54 51
Investments Classified by Contractual Maturity Date	The table below summarizes the maturity date for debt securities. December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 137 $ 7 $ 89 $ 24 $ 65 $ 8 Due after one through five years 807 287 443 244 199 22 Due after five through 10 years 469 230 193 178 15 6 Due after 10 years 1,402 774 552 517 35 24 Total $ 2,815 $ 1,298 $ 1,277 $ 963 $ 314 $ 60
Duke Energy Carolinas
Investment [Line Items]
Summary of Investments in Debt and Equity Securities	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 117 $ — $ — $ 53 Equity securities 2,147 51 3,367 2,887 19 4,265 Corporate debt securities 1 62 401 24 4 506 Municipal bonds — 10 64 2 — 48 U.S. government bonds 1 51 685 16 3 712 Other debt securities — 18 148 3 1 175 Total NDTF Investments $ 2,149 $ 192 $ 4,782 $ 2,932 $ 27 $ 5,759
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 124 $ 440 $ 64 Realized losses 177 96 99 AFS: Realized gains 22 38 60 Realized losses 86 37 37
Progress Energy
Investment [Line Items]
Summary of Investments in Debt and Equity Securities	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 98 $ — $ — $ 107 Equity securities 1,511 54 2,504 2,018 24 3,085 Corporate debt securities — 23 240 15 2 323 Municipal bonds — 29 266 12 1 266 U.S. government bonds 1 61 738 15 9 856 Other debt securities — — 8 — — 5 Total NDTF Investments $ 1,512 $ 167 $ 3,854 $ 2,060 $ 36 $ 4,642 Other Investments Cash and cash equivalents $ — $ — $ 11 $ — $ — $ 20 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 36 $ 2 $ — $ 46 Total Investments $ 1,512 $ 167 $ 3,890 $ 2,062 $ 36 $ 4,688
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 77 $ 284 $ 302 Realized losses 139 45 75 AFS: Realized gains 6 16 24 Realized losses 48 14 13
Duke Energy Progress
Investment [Line Items]
Summary of Investments in Debt and Equity Securities	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 56 $ — $ — $ 94 Equity securities 1,431 54 2,411 1,915 23 2,970 Corporate debt securities — 22 230 15 2 282 Municipal bonds — 29 266 12 1 266 U.S. government bonds 1 37 460 15 3 472 Other debt securities — — 7 — — 5 Total NDTF Investments $ 1,432 $ 142 $ 3,430 $ 1,957 $ 29 $ 4,089 Other Investments Cash and cash equivalents $ — $ — $ 9 $ — $ — $ 16 Total Other Investments $ — $ — $ 9 $ — $ — $ 16 Total Investments $ 1,432 $ 142 $ 3,439 $ 1,957 $ 29 $ 4,105
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 76 $ 283 $ 52 Realized losses 136 44 59 AFS: Realized gains 6 15 24 Realized losses 44 13 13
Duke Energy Florida
Investment [Line Items]
Summary of Investments in Debt and Equity Securities	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value NDTF Cash and cash equivalents $ — $ — $ 42 $ — $ — $ 13 Equity securities 80 — 93 103 1 115 Corporate debt securities — 1 10 — — 41 U.S. government bonds — 24 278 — 6 384 Other debt securities — — 1 — — — Total NDTF Investments (a) $ 80 $ 25 $ 424 $ 103 $ 7 $ 553 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 3 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 26 $ 2 $ — $ 29 Total Investments $ 80 $ 25 $ 450 $ 105 $ 7 $ 582 (a) During the years ended December 31, 2022, and 2021, Duke Energy Florida continued to receive reimbursements from the NDTF for costs related to ongoing decommissioning activity of the Crystal River Unit 3.
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the years ended December 31, 2022, 2021 and 2020, were as follows. Years Ended December 31, (in millions) 2022 2021 2020 FV-NI: Realized gains $ 1 $ 1 $ 250 Realized losses 3 1 16 AFS: Realized gains — 1 — Realized losses 4 1 —
Duke Energy Indiana
Investment [Line Items]
Summary of Investments in Debt and Equity Securities	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. December 31, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Unrealized Unrealized Holding Holding Estimated Holding Holding Estimated (in millions) Gains Losses Fair Value Gains Losses Fair Value Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ — Equity securities 2 16 79 6 — 97 Corporate debt securities — 1 8 — — 6 Municipal bonds — 3 45 1 1 46 U.S. government bonds — — 7 — — 12 Total Investments $ 2 $ 20 $ 140 $ 7 $ 1 $ 161

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 15. See Note 16 for additional information related to investments by major security type for the Duke Energy Registrants. December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 215 $ 215 $ — $ — $ — NDTF equity securities 5,871 5,829 — — 42 NDTF debt securities 2,550 780 1,770 — — Other equity securities 128 128 — — — Other debt securities 265 55 210 — — Other cash and cash equivalents 22 22 — — — Derivative assets 836 1 801 34 — Total assets 9,887 7,030 2,781 34 42 Derivative liabilities (437) (16) (421) — — Net assets (liabilities) $ 9,450 $ 7,014 $ 2,360 $ 34 $ 42 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 160 $ 160 $ — $ — $ — NDTF equity securities 7,350 7,300 — — 50 NDTF debt securities 2,891 967 1,924 — — Other equity securities 156 156 — — — Other debt securities 300 45 255 — — Other cash and cash equivalents 36 36 — — — Derivative assets 320 3 293 24 — Total assets 11,213 8,667 2,472 24 50 Derivative liabilities (327) (13) (314) — — Net assets (liabilities) $ 10,886 $ 8,654 $ 2,158 $ 24 $ 50
Reconciliation of Assets and Liabilities Measured at Fair Value an a Recurring Basis Using Unobservable Inputs	The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Years Ended December 31, (in millions) 2022 2021 Balance at beginning of period $ 24 $ 8 Purchases, sales, issuances and settlements: Purchases 78 21 Settlements (36) (20) Total gains (losses) included on the Consolidated Balance Sheet (32) 15 Balance at end of period $ 34 $ 24
Quantitative Information Table - Level 3	The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. December 31, 2022 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 5 RTO auction pricing FTR price – per MWh $ 0.89 – $ 6.25 $ 3.35 Duke Energy Indiana FTRs 29 RTO auction pricing FTR price – per MWh 0.09 – 21.79 2.74 Duke Energy Total Level 3 derivatives $ 34 December 31, 2021 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 2 RTO auction pricing FTR price – per MWh $ 0.06 – $ 1.79 $ 0.96 Duke Energy Indiana FTRs 22 RTO auction pricing FTR price – per MWh (1.18) – 13.11 2.68 Duke Energy Total Level 3 derivatives $ 24
Schedule of Long-Term Debt Fair Value	The fair value and book value of long-term debt, including current maturities, is summarized in the following table. The following disclosures include debt attributable to the Commercial Renewables Disposal Groups. See Note 2 for further details. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements. December 31, 2022 December 31, 2021 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 71,215 $ 63,454 $ 63,835 $ 69,683 Duke Energy Carolinas 14,266 12,943 13,275 15,101 Progress Energy 22,439 20,467 20,823 23,751 Duke Energy Progress 11,087 9,689 10,249 11,252 Duke Energy Florida 9,709 8,991 8,482 9,772 Duke Energy Ohio 3,245 2,927 3,193 3,570 Duke Energy Indiana 4,307 3,913 4,323 5,067 Piedmont 3,363 2,940 2,968 3,278 (a) Book value of long-term de bt includes $1.17 billion as of December 31, 2022, and $1.25 billion as of December 31, 2021, of unamortized debt discount and premium, net in purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt.
Duke Energy Carolinas
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 117 $ 117 $ — $ — NDTF equity securities 3,367 3,325 — 42 NDTF debt securities 1,298 323 975 — Derivative assets 330 — 330 — Total assets 5,112 3,765 1,305 42 Derivative liabilities (127) — (127) — Net assets $ 4,985 $ 3,765 $ 1,178 $ 42 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 53 $ 53 $ — $ — NDTF equity securities 4,265 4,215 — 50 NDTF debt securities 1,441 339 1,102 — Derivative assets 162 — 162 — Total assets 5,921 4,607 1,264 50 Derivative liabilities (35) — (35) — Net assets $ 5,886 $ 4,607 $ 1,229 $ 50
Progress Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 98 $ 98 $ — $ 107 $ 107 $ — NDTF equity securities 2,504 2,504 — 3,085 3,085 — NDTF debt securities 1,252 457 795 1,450 628 822 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 11 11 — 20 20 — Derivative assets 248 — 248 124 — 124 Total assets 4,138 3,070 1,068 4,812 3,840 972 Derivative liabilities (66) — (66) (24) — (24) Net assets $ 4,072 $ 3,070 $ 1,002 $ 4,788 $ 3,840 $ 948
Duke Energy Progress
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 56 $ 56 $ — $ 94 $ 94 $ — NDTF equity securities 2,411 2,411 — 2,970 2,970 — NDTF debt securities 963 225 738 1,025 289 736 Other cash and cash equivalents 9 9 — 16 16 — Derivative assets 230 — 230 124 — 124 Total assets 3,669 2,701 968 4,229 3,369 860 Derivative liabilities (48) — (48) (10) — (10) Net assets $ 3,621 $ 2,701 $ 920 $ 4,219 $ 3,369 $ 850
Duke Energy Florida
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 42 $ 42 $ — $ 13 $ 13 $ — NDTF equity securities 93 93 — 115 115 — NDTF debt securities 289 232 57 425 339 86 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 1 1 — 3 3 — Derivative assets 17 — 17 — — — Total assets 467 368 99 582 470 112 Derivative liabilities (19) — (19) (14) — (14) Net assets $ 448 $ 368 $ 80 $ 568 $ 470 $ 98
Duke Energy Indiana
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 79 $ 79 $ — $ — $ 97 $ 97 $ — $ — Other debt securities 60 — 60 — 64 — 64 — Other cash equivalents 1 1 — — — — — — Derivative assets 110 — 81 29 23 1 — 22 Total assets 250 80 141 29 184 98 64 22 Derivative liabilities (16) (16) — — (27) (13) (14) — Net assets $ 234 $ 64 $ 141 $ 29 $ 157 $ 85 $ 50 $ 22
Reconciliation of Assets and Liabilities Measured at Fair Value an a Recurring Basis Using Unobservable Inputs	The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Years Ended December 31, (in millions) 2022 2021 Balance at beginning of period $ 22 $ 6 Purchases, sales, issuances and settlements: Purchases 74 18 Settlements (32) (16) Total (losses) gains included on the Consolidated Balance Sheet (35) 14 Balance at end of period $ 29 $ 22
Piedmont
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts for Assets and Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. December 31, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ — $ — $ — $ 3 $ 3 $ — Derivative liabilities (168) — (168) (139) — (139) Net (liabilities) assets $ (168) $ — $ (168) $ (136) $ 3 $ (139)

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2022
Consolidated VIEs
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above. Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Florida (in millions) CRC DERF DEPR DEFR Expiration date February 2025 January 2025 April 2025 April 2023 Credit facility amount $ 350 $ 500 $ 400 $ 250 Amounts borrowed at December 31, 2022 350 471 400 250 Amounts borrowed at December 31, 2021 350 475 350 250 Restricted Receivables at December 31, 2022 917 928 793 490 Restricted Receivables at December 31, 2021 587 844 574 427
Consolidated VIEs | DEFPF
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the impact of DEFPF on Duke Energy Florida's Consolidated Balance Sheets. December 31, (in millions) 2022 2021 Receivables of VIEs $ 6 $ 5 Regulatory Assets: Current 55 54 Current Assets: Other 41 39 Other Noncurrent Assets: Regulatory assets 826 883 Current Liabilities: Other 9 9 Current maturities of long-term debt 56 56 Long-Term Debt 890 946
Consolidated VIEs | DECNCSF and DEPNCSF
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. Duke Energy Carolinas Duke Energy Progress December 31, December 31, (in millions) 2022 2021 2022 2021 Regulatory Assets: Current $ 12 $ 12 $ 39 $ 39 Current Assets: Other 8 — 29 — Other Noncurrent Assets: Regulatory assets 208 220 681 720 Other Noncurrent Assets: Other 1 1 2 4 Current maturities of long-term debt 10 5 34 15 Current Liabilities: Other 3 1 8 2 Long-Term Debt 219 228 714 747
Non-consolidated VIEs
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The following tables summarize the impact of non-consolidated VIEs on the Consolidated Balance Sheets. December 31, 2022 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 198 $ 317 Investments in equity method unconsolidated affiliates 43 — — Other noncurrent assets 45 — — Total assets $ 88 $ 198 $ 317 Other current liabilities 59 — — Other noncurrent liabilities 47 — — Total liabilities $ 106 $ — $ — Net (liabilities) assets $ (18) $ 198 $ 317 December 31, 2021 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 79 $ 97 Investments in equity method unconsolidated affiliates 15 — — Other noncurrent assets 61 — — Total assets $ 76 $ 79 $ 97 Other current liabilities 47 — — Other noncurrent liabilities 54 — — Total liabilities $ 101 $ — $ — Net (liabilities) assets $ (25) $ 79 $ 97
Non-consolidated VIEs | CRC
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	Key assumptions used in estimating fair value are detailed in the following table. Duke Energy Ohio Duke Energy Indiana 2022 2021 2022 2021 Anticipated credit loss ratio 0.5 % 0.5 % 0.3 % 0.3 % Discount rate 2.7 % 1.1 % 2.7 % 1.1 % Receivable turnover rate 13.5 % 13.5 % 11.3 % 11.3 % The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana December 31, December 31, (in millions) 2022 2021 2022 2021 Receivables sold $ 423 $ 269 $ 508 $ 328 Less: Retained interests 198 79 317 97 Net receivables sold $ 225 $ 190 $ 191 $ 231 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Years Ended December 31, Years Ended December 31, (in millions) 2022 2021 2020 2022 2021 2020 Sales Receivables sold $ 2,562 $ 2,023 $ 1,905 $ 3,744 $ 2,909 $ 2,631 Loss recognized on sale 18 10 10 26 13 12 Cash flows Cash proceeds from receivables sold 2,424 2,018 1,875 3,498 2,909 2,586 Collection fees received 1 1 1 2 1 1 Return received on retained interests 10 4 4 15 6 5

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations: Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Progress Energy $ 61 $ 66 $ 7 $ 7 $ 7 $ 36 $ 184 Duke Energy Progress 8 8 — — — — 16 Duke Energy Florida 53 58 7 7 7 36 168 Duke Energy Indiana 11 16 17 15 7 5 71 Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Piedmont $ 68 $ 62 $ 61 $ 51 $ 49 $ 241 $ 532
Disaggregation of Revenue	Disaggregated revenues are presented as follows: Year Ended December 31, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 11,377 $ 3,275 $ 5,812 $ 2,378 $ 3,434 $ 862 $ 1,430 $ — General 7,356 2,396 3,396 1,480 1,916 517 1,049 — Industrial 3,504 1,251 1,095 770 325 202 956 — Wholesale 2,856 561 1,785 1,346 439 127 383 — Other revenues 795 372 994 768 226 61 19 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 25,888 $ 7,855 $ 13,082 $ 6,742 $ 6,340 $ 1,769 $ 3,837 $ — Gas Utilities and Infrastructure Residential $ 1,462 $ — $ — $ — $ — $ 488 $ — $ 974 Commercial 765 — — — — 180 — 585 Industrial 170 — — — — 24 — 144 Power Generation — — — — — — — 94 Other revenues 360 — — — — 25 — 271 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 2,757 $ — $ — $ — $ — $ 717 $ — $ 2,068 Other Revenue from contracts with customers $ 30 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 28,675 $ 7,855 $ 13,082 $ 6,742 $ 6,340 $ 2,486 $ 3,837 $ 2,068 Other revenue sources (a) $ 93 $ 2 $ 43 $ 11 $ 13 $ 28 $ 85 $ 56 Total revenues $ 28,768 $ 7,857 $ 13,125 $ 6,753 $ 6,353 $ 2,514 $ 3,922 $ 2,124 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Year Ended December 31, 2021 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 10,097 $ 3,054 $ 5,084 $ 2,156 $ 2,928 $ 767 $ 1,188 $ — General 6,375 2,210 2,883 1,378 1,505 440 825 — Industrial 2,924 1,145 894 634 260 135 750 — Wholesale 2,199 472 1,385 1,164 221 56 285 — Other revenues 879 264 716 387 329 83 86 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 22,474 $ 7,145 $ 10,962 $ 5,719 $ 5,243 $ 1,481 $ 3,134 $ — Gas Utilities and Infrastructure Residential $ 1,131 $ — $ — $ — $ — $ 354 $ — $ 777 Commercial 561 — — — — 143 — 418 Industrial 158 — — — — 20 — 137 Power Generation — — — — — — — 92 Other revenues 133 — — — — 28 — 45 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,983 $ — $ — $ — $ — $ 545 $ — $ 1,469 Other Revenue from contracts with customers $ 29 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 24,486 $ 7,145 $ 10,962 $ 5,719 $ 5,243 $ 2,026 $ 3,134 $ 1,469 Other revenue sources (a) $ 135 $ (43) $ 95 $ 61 $ 16 $ 11 $ 40 $ 100 Total revenues $ 24,621 $ 7,102 $ 11,057 $ 5,780 $ 5,259 $ 2,037 $ 3,174 $ 1,569 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Year Ended December 31, 2020 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 9,806 $ 2,997 $ 5,017 $ 2,059 $ 2,958 $ 726 $ 1,064 $ — General 6,194 2,233 2,779 1,312 1,467 442 740 — Industrial 2,859 1,137 901 649 252 137 683 — Wholesale 1,864 380 1,228 1,034 194 32 224 — Other revenues 914 281 596 294 302 82 72 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 21,637 $ 7,028 $ 10,521 $ 5,348 $ 5,173 $ 1,419 $ 2,783 $ — Gas Utilities and Infrastructure Residential $ 930 $ — $ — $ — $ — $ 300 $ — $ 630 Commercial 446 — — — — 117 — 329 Industrial 127 — — — — 17 — 110 Power Generation — — — — — — — 34 Other revenues 87 — — — — 17 — 70 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,590 $ — $ — $ — $ — $ 451 $ — $ 1,173 Other Revenue from contracts with customers $ 26 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 23,253 $ 7,028 $ 10,521 $ 5,348 $ 5,173 $ 1,870 $ 2,783 $ 1,173 Other revenue sources (a) $ 113 $ (13) $ 106 $ 74 $ 15 $ (12) $ 12 $ 124 Total revenues $ 23,366 $ 7,015 $ 10,627 $ 5,422 $ 5,188 $ 1,858 $ 2,795 $ 1,297 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues.
Accounts Receivable, Allowance for Credit Loss	The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2019 $ 76 $ 10 $ 16 $ 8 $ 7 $ 4 $ 3 $ 6 Cumulative Change in Accounting Principle 5 1 2 1 1 — — 1 Write-Offs (58) (13) (23) (8) (14) — — (6) Credit Loss Expense 75 13 29 9 20 — — 11 Other Adjustments 48 12 13 13 — — — — Balance at December 31, 2020 $ 146 $ 23 $ 37 $ 23 $ 14 $ 4 $ 3 $ 12 Write-Offs (58) (21) (25) (12) (13) — — (9) Credit Loss Expense 53 27 25 11 14 — — 7 Other Adjustments (20) 13 (1) (1) 1 — — 5 Balance at December 31, 2021 $ 121 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (158) (73) (70) (36) (34) — — (12) Credit Loss Expense 160 40 72 17 55 2 1 11 Other Adjustments 93 59 43 42 (1) — — — Balance at December 31, 2022 $ 216 $ 68 $ 81 $ 44 $ 36 $ 6 $ 4 $ 14
Financing Receivable, Past Due	The aging of trade receivables is presented in the table below. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Receivables (a)(b) $ 1,457 $ 486 $ 355 $ 232 $ 123 $ 20 $ 28 $ 160 Current 2,347 577 1,059 637 417 15 52 265 1-30 days past due 261 96 60 15 45 5 17 15 31-60 days past due 123 23 61 49 12 6 2 3 61-90 days past due 74 25 18 9 9 3 11 2 91+ days past due 209 70 74 27 47 26 6 4 Deferred Payment Arrangements (c) 160 57 62 35 27 4 — 1 Trade and Other Receivables $ 4,631 $ 1,334 $ 1,689 $ 1,004 $ 680 $ 79 $ 116 $ 450 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Receivables (a)(b) $ 922 $ 316 $ 266 $ 193 $ 73 $ 4 $ 27 $ 106 Current 1,941 592 716 405 311 42 50 202 1-30 days past due 288 77 128 44 82 4 5 12 31-60 days past due 98 30 49 21 28 1 10 2 61-90 days past due 118 32 48 28 20 23 5 4 91+ days past due 161 84 37 9 28 24 6 3 Deferred Payment Arrangements (c) 115 55 45 22 23 2 — 4 Trade and Other Receivables $ 3,643 $ 1,186 $ 1,289 $ 722 $ 565 $ 100 $ 103 $ 333 (a) Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Consolidated Balance Sheets. (b) Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 18 for further information. These receivables for unbilled revenues are $148 million and $260 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2022, and $82 million and $121 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2021. (c) Due to ongoing financial hardships impacting customers, Duke Energy has permitted customers to defer payment of past-due amounts through installment payment plans.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Schedule of Earnings Per Share	The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared. Years Ended December 31, (in millions, except per share amounts) 2022 2021 2020 Net Income available to Duke Energy common stockholders $ 2,444 $ 3,802 $ 1,270 Less: (Loss) Income from discontinued operations attributable to Duke Energy common stockholders (1,215) 200 289 Accumulated preferred stock dividends adjustment — — 1 Less: Impact of participating securities 2 3 2 Income from continuing operations available to Duke Energy common stockholders $ 3,657 $ 3,599 $ 980 Loss from discontinued operations, net of tax $ (1,323) $ (144) $ (7) Add: Loss attributable to NCI 108 344 296 (Loss) Income from discontinued operations attributable to Duke Energy common stockholders $ (1,215) $ 200 $ 289 Weighted average common shares outstanding – basic 770 769 737 Equity forwards — — 1 Weighted average common shares outstanding – diluted 770 769 738 EPS from continuing operations available to Duke Energy common stockholders Basic and Diluted $ 4.74 $ 4.68 $ 1.33 (Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and Diluted $ (1.57) $ 0.26 $ 0.39 Potentially dilutive items excluded from the calculation (a) 2 2 2 Dividends declared per common share $ 3.98 $ 3.90 $ 3.82 Dividends declared on Series A preferred stock per depositary share (b) $ 1.437 $ 1.437 $ 1.437 Dividends declared on Series B preferred stock per share (c) $ 48.750 $ 48.750 $ 49.292 (a) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (b) 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share. (c) 4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends are payable semiannually in arrears on the 16th day of March and September. The preferred stock has a $1,000 liquidation preference per share. On September 16, 2024, the First Call Date, and any fifth anniversary of the First Call Date, the dividend rate will reset based on the then current five-year U.S. Treasury rate plus a spread of 3.388%.

Severance (Tables)

Severance (Tables)	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Schedule of Severance Expense	The following table presents the direct and allocated severance and related charges accrued for approximately 233 employees in 2022, 290 employees in 2021 and 30 e mployees in 2020, by the Duke Energy Registrants within Operation, maintenance and other on the Consolidated Statements of Operations. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Year Ended December 31, 2022 (a)(b) $ 65 $ 40 $ 20 $ 17 $ 3 $ 1 $ 2 $ 2 Year Ended December 31, 2021 (c)(d) 69 33 26 20 6 2 3 2 Year Ended December 31, 2020 (e)(f) (85) (58) (28) (31) 3 — — — (a) Includes amortization of deferred severance charges of approximately $33 million, $22 million, $11 million and $11 million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (b) Includes adjustments associated with 2021 severance charges of approximately $(19) million, $(6) million, $(8) million, $(4) million, $(4) million, $(1) million, $(2) million and $(1) million for Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont, respectively. (c) Includes amortization of deferred severance charges of approximately $33 million, $22 million, $11 million and $11 million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (d) Includes adjustments associated with 2018 severance charges of approximately $(3) million, $(2) million and $(1) million for Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively. (e) Includes unamortized deferred severance charges of approximately $(86) million, $(57) million, $(29) million and $(29) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (f) Includes adjustments associated with 2018 severance charges of approximately $(6) million, $(2) million, $(3) million and $(2) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
Schedule of Severance Liability	The table below presents the severance liability for past and ongoing severance plans including the plans described above. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2020 $ 11 $ 2 $ 3 $ 1 $ 2 $ — $ 1 $ — Provision/Adjustments 36 1 1 1 — — — — Cash Reductions (8) (1) (2) (1) (1) — (1) — Balance at December 31, 2021 $ 39 $ 2 $ 2 $ 1 $ 1 $ — $ — $ — Provision/Adjustments 33 14 4 3 1 — — 1 Cash Reductions (8) (1) — — — — — — Balance at December 31, 2022 $ 64 $ 15 $ 6 $ 4 $ 2 $ — $ — $ 1

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Total Stock-Based Compensation Expense, net of tax	The following table summarizes the total expense recognized by the Duke Energy Registrants, net of tax, for stock-based compensation. Years Ended December 31, (in millions) 2022 2021 2020 Duke Energy $ 74 $ 64 $ 61 Duke Energy Carolinas 27 23 22 Progress Energy 27 24 23 Duke Energy Progress 17 15 15 Duke Energy Florida 10 9 9 Duke Energy Ohio 5 5 4 Duke Energy Indiana 7 6 6 Piedmont 4 3 3
Schedule of Stock-Based Compensation Expense	Duke Energy's pretax stock-based compensation costs, the tax benefit associated with stock-based compensation expense and stock-based compensation costs capitalized are included in the following table. Years Ended December 31, (in millions) 2022 2021 2020 RSU awards $ 58 $ 49 $ 46 Performance awards 42 39 38 Pretax stock-based compensation cost $ 100 $ 88 $ 84 Stock-based compensation costs capitalized 5 5 5 Stock-based compensation expense $ 95 $ 83 $ 79 Tax benefit associated with stock-based compensation expense $ 21 $ 19 $ 18
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	The following table includes information related to RSU awards. Years Ended December 31, 2022 2021 2020 Shares granted (in thousands) 654 673 498 Fair value (in millions) $ 64 $ 59 $ 50 The following table summarizes information about RSU awards outstanding. Weighted Average Shares Grant Date Fair Value (in thousands) (per share) Outstanding at December 31, 2021 1,043 $ 92 Granted 654 98 Vested (527) 93 Forfeited (73) 94 Outstanding at December 31, 2022 1,097 95 RSU awards expected to vest 1,056 95
Schedule of Performance Awards	The following table includes information related to stock-based performance awards. Years Ended December 31, 2022 2021 2020 Shares granted assuming target performance (in thousands) 408 380 319 Fair value (in millions) $ 40 $ 33 $ 34
Schedule of Nonvested Performance-based Units Activity	The following table summarizes information about stock-based performance awards outstanding and assumes payout at the target level. Weighted Average Shares Grant Date Fair Value (in thousands) (per share) Outstanding at December 31, 2021 952 $ 93 Granted 408 99 Vested (297) 86 Forfeited (30) 96 Outstanding at December 31, 2022 1,033 97 Stock-based performance awards expected to vest 1,006 97

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Pension Plan Contributions	The following table includes information related to the Duke Energy Registrants’ contributions to its qualified defined benefit pension plans. There were no contributions made in the years ended December 31, 2021 and 2020. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Contributions Made: 2022 $ 58 $ 15 $ 13 $ 8 $ 5 $ 3 $ 5 $ 2
Fair Value and Allocation of Plan Assets	The following table includes the target asset allocations by asset class at December 31, 2022, and the actual asset allocations for the RCBP assets. Actual Allocation at Target December 31, Allocation 2022 2021 Global equity securities 45 % 49 % 24 % Global private equity securities 2 % 2 % 1 % Debt securities 35 % 30 % 62 % Return seeking debt securities 7 % 7 % 4 % Hedge funds 4 % 6 % 3 % Real estate and cash 7 % 6 % 6 % Total 100 % 100 % 100 % The following table includes the target asset allocations by asset class at December 31, 2022, and the actual asset allocations for the DELPP assets. Actual Allocation at Target December 31, Allocation 2022 2021 Global equity securities 14 % 14 % 24 % Global private equity securities 1 % — % 1 % Debt securities 80 % 80 % 62 % Return seeking debt securities 2 % 2 % 4 % Hedge funds 1 % 2 % 3 % Real estate and cash 2 % 2 % 6 % Total 100 % 100 % 100 % The following table presents target and actual asset allocations for the VEBA trusts at December 31, 2022. Actual Allocation at Target December 31, Allocation 2022 2021 U.S. equity securities 30 % 12 % 19 % Non-U.S. equity securities 5 % 5 % 5 % Real estate 1 % 3 % 3 % Debt securities 45 % 11 % 18 % Cash 19 % 69 % 55 % Total 100 % 100 % 100 % The following tables provide the fair value measurement amounts for the Duke Energy Corporation Master Retirement Trust qualified pension and other post-retirement assets. December 31, 2022 Total Fair Not (in millions) Value Level 1 Level 2 Level 3 Categorized (b) Equity securities $ 2,234 $ 2,014 $ 194 $ — $ 26 Corporate debt securities 2,944 — 2,944 — — Short-term investment funds 193 1 192 — — Partnership interests 62 — — 62 — Hedge funds 209 — — — 209 U.S. government securities 1,254 — 1,254 — — Governments bonds – foreign 112 — 112 — — Cash 45 45 — — — Government and commercial mortgage backed securities 6 — 6 — — Net pending transactions and other investments 14 5 9 — — Total assets (a) $ 7,073 $ 2,065 $ 4,711 $ 62 $ 235 (a) Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont were allocated approximately 27%, 33%, 15%, 18%, 5%, 7% and 3%, respectively, of the Duke Energy Corporation Master Retirement Trust at December 31, 2022. Accordingly, all amounts included in the table above are allocable to the Subsidiary Registrants using these percentages. (b) Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy. December 31, 2021 Total Fair Not (in millions) Value Level 1 Level 2 Level 3 Categorized (b) Equity securities $ 2,575 $ 2,547 $ — $ — $ 28 Corporate debt securities 4,189 — 4,189 — — Short-term investment funds 382 272 110 — — Partnership interests 95 — — 95 — Hedge funds 216 — — — 216 U.S. government securities 1,618 — 1,618 — — Governments bonds – foreign 78 — 78 — — Cash 144 144 — — — Government and commercial mortgage backed securities 2 — 2 — — Net pending transactions and other investments 53 12 41 — — Total assets (a) $ 9,352 $ 2,975 $ 6,038 $ 95 $ 244 (a) Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont were allocated approximately 26%, 32%, 15%, 17%, 5%, 7% and 4%, respectively, of the Duke Energy Corporation Master Retirement Trust at December 31, 2021. Accordingly, all amounts included in the table above are allocable to the Subsidiary Registrants using these percentages. (b) Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy. The following tables provide the fair value measurement amounts for VEBA trust assets. December 31, 2022 Total Fair (in millions) Value Level 2 Cash and cash equivalents $ 11 $ 11 Real estate 2 2 Equity securities 12 12 Debt securities 8 8 Total assets $ 33 $ 33 December 31, 2021 Total Fair (in millions) Value Level 2 Cash and cash equivalents $ 14 $ 14 Real estate 2 2 Equity securities 18 18 Debt securities 11 11 Total assets $ 45 $ 45
Master Trust Level 3 Rollforward	The following table provides a reconciliation of beginning and ending balances of Duke Energy Corporation Master Retirement Trust qualified pension and other post-retirement assets at fair value on a recurring basis where the determination of fair value includes significant unobservable inputs (Level 3). (in millions) 2022 2021 Balance at January 1 $ 95 $ — Sales (18) — Total gains and other, net (8) — Transfer of Level 3 assets from other classifications (7) 95 Balance at December 31 $ 62 $ 95
Employee Savings Plan Matching Contributions	The following table includes pretax employer matching contributions made by Duke Energy and expensed by the Subsidiary Registrants. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Years ended December 31, 2022 $ 246 $ 76 $ 65 $ 43 $ 22 $ 6 $ 12 $ 13 2021 229 70 60 39 21 5 12 11 2020 213 67 57 38 19 5 11 13
Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Pension Costs	Components of Net Periodic Pension Costs Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 152 $ 48 $ 43 $ 25 $ 17 $ 4 $ 9 $ 5 Interest cost on projected benefit obligation 249 59 77 35 41 13 20 8 Expected return on plan assets (558) (152) (183) (88) (94) (23) (37) (24) Amortization of actuarial loss 81 16 23 12 12 4 9 5 Amortization of prior service credit (18) (3) — — — — (2) (7) Amortization of settlement charges (c) 32 9 8 7 1 5 1 7 MRVA method change 24 — 24 — 24 — — — Net periodic pension costs (a)(b) $ (38) $ (23) $ (8) $ (9) $ 1 $ 3 $ — $ (6) Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 176 $ 56 $ 50 $ 29 $ 21 $ 5 $ 10 $ 6 Interest cost on projected benefit obligation 220 51 70 30 39 13 18 7 Expected return on plan assets (558) (141) (187) (84) (102) (28) (40) (20) Amortization of actuarial loss 133 29 38 18 20 7 13 10 Amortization of prior service credit (29) (8) (2) (1) (1) (1) (2) (9) Amortization of settlement charges 9 5 2 2 1 — — 1 Net periodic pension costs (a)(b) $ (49) $ (8) $ (29) $ (6) $ (22) $ (4) $ (1) $ (5) Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 165 $ 51 $ 48 $ 27 $ 21 $ 5 $ 9 $ 6 Interest cost on projected benefit obligation 269 62 85 38 46 15 22 9 Expected return on plan assets (572) (145) (190) (87) (101) (28) (42) (21) Amortization of actuarial loss 128 28 41 18 23 6 12 9 Amortization of prior service credit (32) (8) (3) (2) (1) — (2) (9) Amortization of settlement charges (c) 18 9 7 6 1 — 1 1 Net periodic pension costs (a)(b) $ (24) $ (3) $ (12) $ — $ (11) $ (2) $ — $ (5) (a) Duke Energy amounts exclude $3 million, $3 million and $4 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. (b) Duke Energy Ohio amounts exclude $1 million, $1 million and $2 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. (c) Includes settlement charges not deferred as a regulatory asset.
Amounts Recognized in AOCI and Regulatory Assets and Liabilities	Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net increase (decrease) $ 367 $ 221 $ 107 $ 101 $ 5 $ (1) $ (12) $ 9 Accumulated other comprehensive loss (income) Deferred income tax expense $ (7) $ — $ (1) $ — $ — $ — $ — $ — Amortization of prior year service credit — — — — — — — — Amortization of prior year actuarial losses 37 — 2 — — — — — Net amount recognized in accumulated other comprehensive income $ 30 $ — $ 1 $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net decrease $ (261) $ (57) $ (128) $ (31) $ (97) $ (17) $ (19) $ (5) Accumulated other comprehensive loss (income) Deferred income tax expense $ 1 $ — $ — $ — $ — $ — $ — $ — Amortization of prior year service credit 1 — — — — — — — Amortization of prior year actuarial losses (8) — (1) — — — — — Net amount recognized in accumulated other comprehensive income $ (6) $ — $ (1) $ — $ — $ — $ — $ —
Reconciliation of Funded Status to Net Amount Recognized	Reconciliation of Funded Status to Net Amount Recognized Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Obligation at prior measurement date $ 8,207 $ 1,903 $ 2,560 $ 1,153 $ 1,392 $ 450 $ 680 $ 273 Service cost 145 47 40 24 16 4 8 5 Interest cost 249 59 77 35 41 13 20 8 Actuarial gain (1,490) (301) (513) (197) (312) (84) (143) (47) Benefits paid (753) (159) (184) (101) (82) (50) (66) (69) Transfers — 5 (5) (5) — — — — Obligation at measurement date $ 6,358 $ 1,554 $ 1,975 $ 909 $ 1,055 $ 333 $ 499 $ 170 Accumulated Benefit Obligation at measurement date $ 6,324 $ 1,556 $ 1,959 $ 910 $ 1,038 $ 327 $ 495 $ 170 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 9,235 $ 2,365 $ 3,053 $ 1,421 $ 1,610 $ 438 $ 669 $ 334 Employer contributions 58 15 13 8 5 3 5 2 Actual return on plan assets (1,547) (411) (506) (240) (262) (68) (107) (64) Benefits paid (753) (159) (184) (101) (82) (50) (66) (69) Transfers — 5 (5) (5) — — — — Plan assets at measurement date $ 6,993 $ 1,815 $ 2,371 $ 1,083 $ 1,271 $ 323 $ 501 $ 203 Funded status of plan $ 635 $ 261 $ 396 $ 174 $ 216 $ (10) $ 2 $ 33 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Obligation at prior measurement date $ 8,634 $ 1,988 $ 2,715 $ 1,193 $ 1,507 $ 502 $ 715 $ 293 Service cost 168 54 48 28 20 5 9 6 Interest cost 220 51 70 30 39 13 18 7 Actuarial gain (200) (42) (108) (18) (89) (10) (10) (5) Benefits paid (615) (148) (161) (80) (81) (50) (52) (28) Transfers — — (4) — (4) (10) — — Obligation at measurement date $ 8,207 $ 1,903 $ 2,560 $ 1,153 $ 1,392 $ 450 $ 680 $ 273 Accumulated Benefit Obligation at measurement date $ 8,144 $ 1,904 $ 2,529 $ 1,154 $ 1,361 $ 439 $ 672 $ 274 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 9,337 $ 2,381 $ 3,049 $ 1,422 $ 1,605 $ 472 $ 684 $ 343 Actual return on plan assets 513 132 169 79 90 26 37 19 Benefits paid (615) (148) (161) (80) (81) (50) (52) (28) Transfers — — (4) — (4) (10) — — Plan assets at measurement date $ 9,235 $ 2,365 $ 3,053 $ 1,421 $ 1,610 $ 438 $ 669 $ 334 Funded status of plan $ 1,028 $ 462 $ 493 $ 268 $ 218 $ (12) $ (11) $ 61
Amounts Recognized in the Consolidated Balance Sheet	Amounts Recognized in the Consolidated Balance Sheets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded pension (a) $ 885 $ 261 $ 396 $ 174 $ 216 $ 62 $ 90 $ 33 Noncurrent pension liability (b) $ 250 $ — $ — $ — $ — $ 72 $ 88 $ — Net asset (liability) recognized $ 635 $ 261 $ 396 $ 174 $ 216 $ (10) $ 2 $ 33 Regulatory assets $ 2,016 $ 545 $ 670 $ 353 $ 316 $ 92 $ 178 $ 84 Accumulated other comprehensive (income) loss Deferred income tax benefit $ (27) $ — $ (1) $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial loss 129 — 3 — — — — — Net amounts recognized in accumulated other comprehensive loss $ 101 $ — $ 2 $ — $ — $ — $ — $ — December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded pension (a) $ 1,071 $ 462 $ 494 $ 268 $ 219 $ 74 $ 100 $ 61 Noncurrent pension liability (b) $ 43 $ — $ 1 $ — $ 1 $ 86 $ 111 $ — Net asset (liability) recognized $ 1,028 $ 462 $ 493 $ 268 $ 218 $ (12) $ (11) $ 61 Regulatory assets $ 1,649 $ 324 $ 563 $ 252 $ 311 $ 93 $ 190 $ 75 Accumulated other comprehensive (income) loss Deferred income tax benefit $ (20) $ — $ — $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial loss 92 — 1 — — — — — Net amounts recognized in accumulated other comprehensive loss $ 71 $ — $ 1 $ — $ — $ — $ — $ — (a) Included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets. (b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.
Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets	Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets December 31, 2022 Duke Duke Duke Energy Energy (in millions) Energy Ohio Indiana Projected benefit obligation $ 3,323 $ 103 $ 198 Accumulated benefit obligation 3,288 99 193 Fair value of plan assets 3,073 31 110 December 31, 2021 Duke Duke Energy Energy (in millions) Ohio Indiana Projected benefit obligation $ 153 $ 284 Accumulated benefit obligation 143 275 Fair value of plan assets 67 173
Assumptions Used for Pension Benefits Accounting	The following tables present the assumptions or range of assumptions used for pension benefit accounting. December 31, 2022 2021 2020 Benefit Obligations Discount rate 5.60% 2.90% 2.60% Interest crediting rate 4.35% 4.00% 4.00% Salary increase 3.50 % – 4.00% 3.50 % – 4.00% 3.50 % – 4.00% Net Periodic Benefit Cost Discount rate 2.90 % – 5.70% 2.60% 3.30% Interest crediting rate 4.00% 4.00% 4.00% Salary increase 3.50 % – 4.00% 3.50 % – 4.00% 3.50 % – 4.00% Expected long-term rate of return on plan assets 6.50% 6.50% 6.85%
Expected Benefit Payments	Expected Benefit Payments Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Years ending December 31, 2023 $ 661 $ 186 $ 183 $ 99 $ 83 $ 32 $ 45 $ 19 2024 635 176 180 95 84 31 45 18 2025 629 174 183 97 85 31 44 16 2026 607 164 180 91 87 30 44 16 2027 592 156 177 89 87 29 43 15 2028-2032 2,581 628 804 372 427 135 205 71
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Pension Costs	Components of Net Periodic Other Post-Retirement Benefit Costs Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 3 $ 1 $ — $ — $ — $ — $ — $ — Interest cost on accumulated post-retirement benefit obligation 17 4 7 4 3 1 1 1 Expected return on plan assets (10) (6) — — — — — (2) Amortization of actuarial loss 2 — 1 1 1 — — — Amortization of prior service credit (8) (3) (2) (1) (1) — — (2) Net periodic post-retirement benefit costs (a)(b) $ 4 $ (4) $ 6 $ 4 $ 3 $ 1 $ 1 $ (3) Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 4 $ 1 $ 1 $ — $ — $ — $ 1 $ — Interest cost on accumulated post-retirement benefit obligation 18 4 7 4 3 1 1 1 Expected return on plan assets (11) (7) — — — — — (2) Amortization of actuarial loss 2 — 1 — 1 — 4 — Amortization of prior service credit (13) (4) (2) (1) (1) (1) (1) (2) Net periodic post-retirement benefit costs (a)(b) $ — $ (6) $ 7 $ 3 $ 3 $ — $ 5 $ (3) Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 4 $ 1 $ 1 $ — $ — $ — $ 1 $ — Interest cost on accumulated post-retirement benefit obligation 23 5 10 5 4 1 2 1 Expected return on plan assets (13) (8) — — — — — (2) Amortization of actuarial loss 2 — 1 — 1 — 4 — Amortization of prior service credit (14) (4) (3) (1) (2) (1) (1) (2) Net periodic post-retirement benefit costs (a)(b) $ 2 $ (6) $ 9 $ 4 $ 3 $ — $ 6 $ (3) (a) Duke Energy amounts exclude $4 million, $5 million and $6 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006. (b) Duke Energy Ohio amounts exclude $1 million, $1 million and $1 million for the years ended December 2022, 2021 and 2020, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006.
Amounts Recognized in AOCI and Regulatory Assets and Liabilities	Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net (decrease) increase $ (79) $ — $ (80) $ (45) $ (36) $ — $ (3) $ — Regulatory liabilities, net increase (decrease) $ 27 $ — $ — $ — $ — $ — $ 19 $ (5) Accumulated other comprehensive (income) loss Amortization of prior year actuarial gain $ 1 $ — $ — $ — $ — $ — $ — $ — Net amount recognized in accumulated other comprehensive income $ 1 $ — $ — $ — $ — $ — $ — $ — Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Regulatory assets, net (decrease) increase $ (15) $ — $ (18) $ (9) $ (9) $ 4 $ (4) $ — Regulatory liabilities, net increase $ 23 $ 12 $ — $ — $ — $ 4 $ 1 $ 2 Accumulated other comprehensive (income) loss Amortization of prior year actuarial gain $ (1) $ — $ — $ — $ — $ — $ — $ — Net amount recognized in accumulated other comprehensive income $ (1) $ — $ — $ — $ — $ — $ — $ —
Reconciliation of Funded Status to Net Amount Recognized	Reconciliation of Funded Status to Accrued Other Post-Retirement Benefit Costs Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Accumulated post-retirement benefit obligation at prior measurement date $ 625 $ 149 $ 263 $ 147 $ 112 $ 25 $ 54 $ 27 Service cost 3 1 — — — — — — Interest cost 17 4 7 4 3 1 1 1 Plan participants' contributions 11 2 4 2 2 1 1 — Actuarial gains (80) (17) (43) (27) (16) (3) (1) (5) Plan amendments (71) (11) (37) (18) (19) — (17) — Benefits paid (68) (16) (26) (13) (13) (4) (8) (2) Accumulated post-retirement benefit obligation at measurement date $ 437 $ 112 $ 168 $ 95 $ 69 $ 20 $ 30 $ 21 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 211 $ 135 $ (1) $ (2) $ (2) $ 9 $ 6 $ 39 Actual return on plan assets (31) (19) — — — (2) — (7) Benefits paid (68) (16) (26) (13) (13) (4) (8) (2) Employer contributions 39 3 23 11 11 3 4 1 Plan participants' contributions 11 2 4 2 2 1 1 — Plan assets at measurement date $ 162 $ 105 $ — $ (2) $ (2) $ 7 $ 3 $ 31 Funded status of plan $ (275) $ (7) $ (168) $ (97) $ (71) $ (13) $ (27) $ 10 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Change in Projected Benefit Obligation Accumulated post-retirement benefit obligation at prior measurement date $ 709 $ 174 $ 299 $ 166 $ 130 $ 27 $ 61 $ 30 Service cost 4 1 1 — — — 1 — Interest cost 18 4 7 4 3 1 1 1 Plan participants' contributions 14 3 5 3 2 1 2 — Actuarial gains (47) (14) (20) (10) (10) (1) (2) (2) Benefits paid (73) (19) (29) (16) (13) (3) (9) (2) Accumulated post-retirement benefit obligation at measurement date $ 625 $ 149 $ 263 $ 147 $ 112 $ 25 $ 54 $ 27 Change in Fair Value of Plan Assets Plan assets at prior measurement date $ 237 $ 139 $ (1) $ (2) $ (1) $ 9 $ 7 $ 37 Actual return on plan assets 15 9 — — — 1 — 3 Benefits paid (73) (19) (29) (16) (13) (3) (9) (2) Employer contributions 18 3 24 13 10 1 6 1 Plan participants' contributions 14 3 5 3 2 1 2 — Plan assets at measurement date $ 211 $ 135 $ (1) $ (2) $ (2) $ 9 $ 6 $ 39 Funded status of plan $ (414) $ (14) $ (264) $ (149) $ (114) $ (16) $ (48) $ 12
Amounts Recognized in the Consolidated Balance Sheet	Amounts Recognized in the Consolidated Balance Sheets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded post-retirement benefit $ — $ — $ — $ — $ — $ 1 $ — $ 10 Current post-retirement liability (a) 9 — 5 3 2 2 — — Noncurrent post-retirement liability (b) 266 7 163 94 69 12 27 — Net liability (asset) recognized $ 275 $ 7 $ 168 $ 97 $ 71 $ 13 $ 27 $ (10) Regulatory assets $ 50 $ — $ 46 $ 34 $ 11 $ 4 $ 25 $ — Regulatory liabilities $ 189 $ 44 $ — $ — $ — $ 21 $ 82 $ — Accumulated other comprehensive (income) loss Deferred income tax expense $ 3 $ — $ — $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial gain (13) — — — — — — — Net amounts recognized in accumulated other comprehensive income $ (11) $ — $ — $ — $ — $ — $ — $ — December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Prefunded post-retirement benefit $ 12 $ — $ — $ — $ — $ 1 $ — $ 12 Current post-retirement liability (a) 9 — 5 3 2 1 — — Noncurrent post-retirement liability (b) 417 14 259 146 112 16 48 — Net liability (asset) recognized $ 414 $ 14 $ 264 $ 149 $ 114 $ 16 $ 48 $ (12) Regulatory assets $ 129 $ — $ 126 $ 79 $ 47 $ 4 $ 28 $ — Regulatory liabilities $ 162 $ 44 $ — $ — $ — $ 21 $ 63 $ 5 Accumulated other comprehensive (income) loss Deferred income tax expense $ 3 $ — $ — $ — $ — $ — $ — $ — Prior service credit (1) — — — — — — — Net actuarial gain (14) — — — — — — — Net amounts recognized in accumulated other comprehensive income $ (12) $ — $ — $ — $ — $ — $ — $ — (a) Included in Other within Current Liabilities on the Consolidated Balance Sheets. (b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.
Assumptions Used for Pension Benefits Accounting	The following tables present the assumptions used for other post-retirement benefits accounting. December 31, 2022 2021 2020 Benefit Obligations Discount rate 5.60 % 2.90 % 2.60 % Net Periodic Benefit Cost Discount rate 2.90 % 2.60 % 3.30 % Expected long-term rate of return on plan assets 6.50 % 6.50 % 6.85 %
Expected Benefit Payments	Expected Benefit Payments Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Years ending December 31, 2023 $ 68 $ 16 $ 25 $ 14 $ 11 $ 3 $ 7 $ 2 2024 49 13 18 10 7 3 4 2 2025 45 12 16 9 7 2 3 2 2026 41 11 15 9 6 2 3 2 2027 38 10 14 8 6 2 3 2 2028-2032 158 41 61 36 25 8 9 9
Assumed Health Care Cost Trend Rate	Assumed Health Care Cost Trend Rate December 31, 2022 2021 Health care cost trend rate assumed for next year 6.50 % 6.25 % Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.75 % 4.75 % Year that rate reaches ultimate trend 2030-2032 2028

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Components of Income Tax Expense Tax benefit from discontinued operations, in the following tables, includes income tax benefits related to the Commercial Renewables Disposal Groups. See Note 2 for further details. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current income taxes Federal $ 1 $ (71) $ (13) $ 37 $ (37) $ (2) $ 38 $ 32 State (8) (13) (3) — (23) 1 2 2 Foreign 4 — — — — — — — Total current income taxes (3) (84) (16) 37 (60) (1) 40 34 Deferred income taxes Federal 328 230 310 118 201 (22) (63) 12 State (14) (16) 59 7 84 3 — (7) Total deferred income taxes (a) 314 214 369 125 285 (19) (63) 5 ITC amortization (11) (4) (5) (4) — (1) (1) — Income tax expense from continuing operations 300 126 348 158 225 (21) (24) 39 Tax benefit from discontinued operations (503) — — — — — — — Total income tax (benefit) expense included in Consolidated Statements of Operations $ (203) $ 126 $ 348 $ 158 $ 225 $ (21) $ (24) $ 39 (a) Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $550 million at Duke Energy, $97 million at Duke Energy Carolinas, $128 million at Progress Energy, $9 million at Duke Energy Progress, $111 million at Duke Energy Florida, $7 million at Duke Energy Ohio, $13 million at Duke Energy Indiana, and $12 million at Piedmont. Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current income taxes Federal $ (2) $ 241 $ (15) $ 113 $ (75) $ (8) $ 65 $ 23 State 1 23 (4) 8 (17) (2) 7 3 Foreign 2 — — — — — — — Total current income taxes 1 264 (19) 121 (92) (10) 72 26 Deferred income taxes Federal 275 (130) 203 (16) 202 35 19 17 State — (79) 47 (26) 77 5 16 (13) Total deferred income taxes (a) 275 (209) 250 (42) 279 40 35 4 ITC amortization (8) (4) (4) (4) — — — — Income tax expense from continuing operations 268 51 227 75 187 30 107 30 Tax benefit from discontinued operations (76) — — — — — — — Total income tax expense included in Consolidated Statements of Operations $ 192 $ 51 $ 227 $ 75 $ 187 $ 30 $ 107 $ 30 (a) Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $32 million at Duke Energy Carolinas, $8 million at Duke Energy Indiana, and $3 million at Piedmont. In addition, total deferred income taxes includes utilization of NOL carryforwards and tax credit carryforwards of $250 million at Duke Energy, $95 million at Progress Energy, $14 million at Duke Energy Progress, $64 million at Duke Energy Florida, and $2 million at Duke Energy Ohio. Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current income taxes Federal $ (281) $ 314 $ 280 $ 181 $ 148 $ 10 $ 48 $ (27) State (3) 35 29 17 24 1 7 (8) Foreign 1 — — — — — — — Total current income taxes (283) 349 309 198 172 11 55 (35) Deferred income taxes Federal 222 (171) (167) (180) 1 30 12 60 State (98) (86) (24) (49) 25 2 17 (7) Total deferred income taxes (a) 124 (257) (191) (229) 26 32 29 53 ITC amortization (10) (4) (5) (5) — — — — Income tax (benefit) expense from continuing operations (169) 88 113 (36) 198 43 84 18 Tax benefit from discontinued operations (65) — — — — — — — Total income tax (benefit) expense included in Consolidated Statements of Operations $ (234) $ 88 $ 113 $ (36) $ 198 $ 43 $ 84 $ 18
Schedule of Income before Income Tax, Domestic and Foreign	Duke Energy Income from Continuing Operations before Income Taxes Years Ended December 31, (in millions) 2022 2021 2020 Domestic $ 3,991 $ 3,947 $ 907 Foreign 87 44 13 Income from continuing operations before income taxes $ 4,078 $ 3,991 $ 920
Summary of Effective Tax Rates	The following tables present a reconciliation of income tax expense at the U.S. federal statutory tax rate to the actual tax expense from continuing operations. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Income tax expense, computed at the statutory rate of 21% $ 856 $ 362 $ 457 $ 245 $ 238 $ 59 $ 24 $ 76 State income tax, net of federal income tax effect (17) (23) 44 6 48 3 2 (4) Amortization of excess deferred income tax (481) (195) (133) (74) (59) (79) (48) (23) AFUDC equity income (41) (20) (14) (11) (3) (1) (2) (2) AFUDC equity depreciation 36 18 12 6 6 1 4 — Other tax credits (43) (12) (16) (9) (7) (2) (3) (8) Other items, net (10) (4) (2) (5) 2 (2) (1) — Income tax expense from continuing operations $ 300 $ 126 $ 348 $ 158 $ 225 $ (21) $ (24) $ 39 Effective tax rate 7.4 % 7.3 % 16.0 % 13.6 % 19.8 % (7.5) % (21.2) % 10.8 % Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Income tax expense, computed at the statutory rate of 21% $ 838 $ 291 $ 384 $ 224 $ 194 $ 49 $ 123 $ 71 State income tax, net of federal income tax effect 1 (44) 34 (14) 47 2 18 (8) Amortization of excess deferred income tax (438) (184) (174) (120) (54) (22) (34) (25) AFUDC equity income (34) (14) (11) (7) (3) (2) (4) (4) AFUDC equity depreciation 35 18 10 5 5 2 5 — Other tax credits (30) (12) (11) (8) (3) (1) (2) (4) Valuation allowance (a) (85) — — — — — — — Other items, net (19) (4) (5) (5) 1 2 1 — Income tax expense from continuing operations $ 268 $ 51 $ 227 $ 75 $ 187 $ 30 $ 107 $ 30 Effective tax rate 6.7 % 3.7 % 12.4 % 7.0 % 20.2 % 12.8 % 18.2 % 8.8 % (a) In the fourth quarter of 2021, the company recognized a federal capital gain in the amount of $426 million. As a result, a valuation allowance of $85 million related to a federal capital loss carryforward was released. This valuation allowance was originally recorded as a result of the 2019 sale of minority interest of certain renewable assets within the Commercial Renewables Disposal Groups. Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Income tax expense, computed at the statutory rate of 21% $ 193 $ 219 $ 243 $ 80 $ 204 $ 62 $ 103 $ 61 State income tax, net of federal income tax effect (80) (40) 4 (25) 39 2 19 (12) Amortization of excess deferred income tax (276) (82) (118) (68) (49) (20) (36) (21) AFUDC equity income (48) (13) (9) (6) (3) (2) (4) (10) AFUDC equity depreciation 103 19 10 5 5 1 4 — Other tax credits (37) (13) (16) (14) (2) (1) (3) (2) Tax true up (12) (3) 1 (5) 5 — (1) 1 Other items, net (12) 1 (2) (3) (1) 1 2 1 Income tax (benefit) expense from continuing operations $ (169) $ 88 $ 113 $ (36) $ 198 $ 43 $ 84 $ 18 Effective tax rate (18.4) % 8.4 % 9.7 % (9.5) % 20.4 % 14.6 % 17.1 % 6.2 %
Schedule of Deferred Tax Assets and Liabilities	Net Deferred Income Tax Liability Components The following tables include deferred income tax assets and liabilities related to the Commercial Renewables Disposal Groups. See Note 2 for further details. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Deferred credits and other liabilities $ 348 $ 170 $ 117 $ 33 $ 83 $ 12 $ 23 $ 24 Lease obligations 405 89 263 197 65 4 15 3 Pension, post-retirement and other employee benefits 192 (1) 12 18 (10) 9 10 (2) Progress Energy merger purchase accounting adjustments (a) 301 — — — — — — — Tax credits and NOL carryforwards 4,426 444 618 167 412 20 208 37 Regulatory liabilities and deferred credits — — — — — 3 61 — Investments and other assets — — — — — 3 — — Other 106 18 22 12 10 5 2 9 Valuation allowance (519) — — — — — — — Total deferred income tax assets 5,259 720 1,032 427 560 56 319 71 Investments and other assets (1,671) (983) (521) (432) (102) — (12) (28) Accelerated depreciation rates (11,478) (3,410) (4,358) (1,844) (2,576) (1,192) (1,606) (892) Regulatory assets and deferred debits, net (2,074) (480) (1,300) (628) (671) — — (21) Total deferred income tax liabilities (15,223) (4,873) (6,179) (2,904) (3,349) (1,192) (1,618) (941) Net deferred income tax liabilities $ (9,964) $ (4,153) $ (5,147) $ (2,477) $ (2,789) $ (1,136) $ (1,299) $ (870) (a) Primarily related to lease obligations and debt fair value adjustments. December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Deferred credits and other liabilities $ 347 $ 121 $ 101 $ 60 $ 40 $ 19 $ 7 $ 18 Lease obligations 346 91 197 121 76 4 16 4 Pension, post-retirement and other employee benefits 207 (36) 30 17 7 11 20 (8) Progress Energy merger purchase accounting adjustments (a) 340 — — — — — — — Tax credits and NOL carryforwards 3,784 349 497 160 306 13 195 29 Regulatory liabilities and deferred credits — 11 — — — 16 — 6 Investments and other assets — — — — — 5 6 — Other 85 12 12 7 4 7 2 8 Valuation allowance (518) — — — — — — — Total deferred income tax assets 4,591 548 837 365 433 75 246 57 Investments and other assets (2,428) (1,205) (742) (610) (135) — — (39) Accelerated depreciation rates (10,391) (2,977) (3,891) (1,546) (2,382) (1,125) (1,496) (833) Regulatory assets and deferred debits, net (1,151) — (768) (417) (350) — (53) — Total deferred income tax liabilities (13,970) (4,182) (5,401) (2,573) (2,867) (1,125) (1,549) (872) Net deferred income tax liabilities $ (9,379) $ (3,634) $ (4,564) $ (2,208) $ (2,434) $ (1,050) $ (1,303) $ (815) (a) Primarily related to lease obligations and debt fair value adjustments.
Summary of Tax Credit Carryforwards	The following table presents the expiration of tax credits and NOL carryforwards. December 31, 2022 (in millions) Amount Expiration Year General Business Credits $ 2,473 2027 — 2042 Federal NOL carryforwards (a) (e) 306 2024 — Indefinite Charitable contribution carryforwards 18 2024 — 2027 State carryforwards and credits (b) (e) 394 2023 — Indefinite Foreign NOL carryforwards (c) 12 2027 — 2037 Foreign Tax Credits (d) 1,223 2024 — 2028 Total tax credits and NOL carryforwards $ 4,426 (a) A valuation allowance of $4 million has been recorded on the Federal NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table. (b) A valuation allowance of $109 million has been recorded on the state NOL and attribute carryforwards, as presented in the Net Deferred Income Tax Liability Components table. (c) A valuation allowance of $12 million has been recorded on the foreign NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table. (d) A valuation allowance of $391 million has been recorded on the foreign tax credits, as presented in the Net Deferred Income Tax Liability Components table. (e) Indefinite carryforward for Federal NOLs, and NOLs for states that have adopted the Tax Act's NOL provisions, generated in tax years beginning after December 31, 2017.
Schedule of Unrecognized Tax Benefits Roll Forward	The following tables present changes to unrecognized tax benefits. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unrecognized tax benefits – January 1 $ 51 $ 13 $ 15 $ 10 $ 4 $ 1 $ 2 $ 4 Gross decreases – tax positions in prior periods — — — — — — — — Gross increases – current period tax positions 14 4 4 3 1 — — 5 Total changes 14 4 4 3 1 — — 5 Unrecognized tax benefits – December 31 $ 65 $ 17 $ 19 $ 13 $ 5 $ 1 $ 2 $ 9 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unrecognized tax benefits – January 1 $ 125 $ 10 $ 10 $ 6 $ 3 $ 1 $ 1 $ 1 Gross decreases – tax positions in prior periods (a) (86) — — — — — — — Gross increases – current period tax positions 12 3 5 4 1 — 1 3 Total changes (74) 3 5 4 1 — 1 3 Unrecognized tax benefits – December 31 $ 51 $ 13 $ 15 $ 10 $ 4 $ 1 $ 2 $ 4 (a) In the fourth quarter of 2021, the company recognized a federal capital gain in the amount of $426 million. As a result of the capital gain, a previously recorded unrecognized tax benefit related to the character of a taxable loss has been reversed. See note (a) under the Statutory Rate Reconciliation table for more details. Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unrecognized tax benefits – January 1 $ 126 $ 8 $ 9 $ 6 $ 3 $ 1 $ 1 $ 4 Gross decreases – tax positions in prior periods (2) — — — — — — — Gross increases – current period tax positions 4 2 1 — — — — — Reduction due to lapse of statute of limitations (3) — — — — — — (3) Total changes (1) 2 1 — — — — (3) Unrecognized tax benefits – December 31 $ 125 $ 10 $ 10 $ 6 $ 3 $ 1 $ 1 $ 1
Summary of Income Tax Contingencies	The following table includes additional information regarding the Duke Energy Registrants' unrecognized tax benefits at December 31, 2022. None of Duke Energy Registrants anticipates a material increase or decrease in unrecognized tax benefits within the next 12 months. December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Amount that if recognized, would affect the effective tax rate or regulatory liability (a) $ 59 $ 17 $ 18 $ 13 $ 5 $ 1 $ 2 $ 8 (a) The Duke Energy Registrants are unable to estimate the specific amounts that would affect the ETR versus the regulatory liability.

Other Income and Expenses, Net

Other Income and Expenses, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Other Income and Expenses [Abstract]
Schedule of Other Income and Expenses, Net	The components of Other income and expenses, net on the Consolidated Statements of Operations are as follows. Year Ended December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Interest income $ 27 $ 2 $ 24 $ 4 $ 20 $ 11 $ 15 $ 19 AFUDC equity 197 98 68 52 16 7 13 11 Post in-service equity returns 34 14 18 18 — 1 1 — Nonoperating income, other 134 107 71 40 38 — 7 16 Other income and expense, net $ 392 $ 221 $ 181 $ 114 $ 74 $ 19 $ 36 $ 46 Year Ended December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Interest income $ 13 $ 4 $ 8 $ 6 $ 2 $ 4 $ 6 $ 19 AFUDC equity 171 65 51 34 16 7 27 20 Post in-service equity returns 39 21 16 16 — 1 1 — Nonoperating income, other 413 180 140 87 53 6 8 16 Other income and expense, net $ 636 $ 270 $ 215 $ 143 $ 71 $ 18 $ 42 $ 55 Year Ended December 31, 2020 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Interest income $ 30 $ 4 $ 8 $ 2 $ 6 $ 4 $ 6 $ 17 AFUDC equity 154 62 42 29 12 7 23 19 Post in-service equity returns 27 17 8 8 — 1 1 — Nonoperating income, other 240 94 71 36 35 4 7 15 Other income and expense, net $ 451 $ 177 $ 129 $ 75 $ 53 $ 16 $ 37 $ 51

Quarterly Financial Data (Una_2

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2022
Quarterly Financial Information Disclosure [Abstract]
Schedule Of Quarterly Financial Information	Quarterly EPS amounts may not sum to the full-year total due to changes in the weighted average number of common shares outstanding and rounding. First Second Third Fourth (in millions, except per share data) Quarter Quarter Quarter Quarter Total 2022 Operating revenues $ 7,011 $ 6,564 $ 7,842 $ 7,351 $ 28,768 Operating income 1,314 1,448 2,056 1,194 6,012 Income from continuing operations 835 898 1,410 635 3,778 (Loss) Income from discontinued operations, net of tax (15) (18) 3 (1,293) (1,323) Net income (loss) 820 880 1,413 (658) 2,455 Net income (loss) available to Duke Energy Corporation common stockholders 818 893 1,383 (650) 2,444 Earnings per share: Income from continuing operations available to Duke Energy Corporation common stockholders Basic and diluted $ 1.06 $ 1.11 $ 1.78 $ 0.80 $ 4.74 Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders Basic and diluted $ 0.02 $ 0.03 $ 0.03 $ (1.66) $ (1.57) Net income (loss) available to Duke Energy Corporation common stockholders Basic and diluted $ 1.08 $ 1.14 $ 1.81 $ (0.86) $ 3.17 2021 Operating revenues $ 6,032 $ 5,638 $ 6,834 $ 6,117 $ 24,621 Operating income 1,466 1,198 1,726 1,110 5,500 Income from continuing operations 967 723 1,333 700 3,723 Loss from discontinued operations, net of tax (26) (25) (57) (36) (144) Net income 941 698 1,276 664 3,579 Net income available to Duke Energy Corporation common stockholders 953 751 1,366 732 3,802 Earnings per share: Income from continuing operations available to Duke Energy Corporation common stockholders Basic and diluted $ 1.22 $ 0.90 $ 1.69 $ 0.86 $ 4.68 Income from discontinued operations attributable to Duke Energy Corporation common stockholders Basic and diluted $ 0.03 $ 0.06 $ 0.10 $ 0.07 $ 0.26 Net income available to Duke Energy Corporation common stockholders Basic and diluted $ 1.25 $ 0.96 $ 1.79 $ 0.93 $ 4.94
Schedule Of Unusual Or Infrequently Occurring Items

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Other Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current Liabilities
Organization And Basis Of Presentation [Line Items]
Accrued compensation	$ 778	$ 915
Duke Energy Carolinas | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Accrued compensation	247	277
Duke Energy Progress | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Customer deposits	106	144
Other accrued liabilities	124	163
Duke Energy Florida | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Customer deposits	200	200
Other accrued liabilities	61	89
Duke Energy Ohio | Current Assets
Organization And Basis Of Presentation [Line Items]
Gas Storage	57	25
Duke Energy Ohio | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Collateral liabilities	53	57
Duke Energy Indiana | Current Assets
Organization And Basis Of Presentation [Line Items]
Mark-to-market transactions	$ 110	$ 23

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 409	$ 341
Other	173	170
Other Noncurrent Assets
Other	11	6
Total cash, cash equivalents and restricted cash	593	517
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	44	7
Other	8
Other Noncurrent Assets
Other	1	1
Total cash, cash equivalents and restricted cash	53	8
Progress Energy
Current Assets
Cash and cash equivalents	108	70
Other	74	39
Other Noncurrent Assets
Other	2	4
Total cash, cash equivalents and restricted cash	184	113
Duke Energy Progress
Current Assets
Cash and cash equivalents	49	35
Other	28
Other Noncurrent Assets
Other	2	4
Total cash, cash equivalents and restricted cash	79	39
Duke Energy Florida
Current Assets
Cash and cash equivalents	45	23
Other	41	39
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	$ 86	$ 62

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (Inventory) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, Inventory [Line Items]
Materials and supplies	$ 2,604	$ 2,309
Coal	620	486
Natural gas, oil and other	360	316
Total inventory	3,584	3,111
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Materials and supplies	876	793
Coal	253	195
Natural gas, oil and other	35	38
Total inventory	1,164	1,026
Progress Energy
Public Utilities, Inventory [Line Items]
Materials and supplies	1,232	1,067
Coal	190	167
Natural gas, oil and other	157	164
Total inventory	1,579	1,398
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Materials and supplies	819	729
Coal	99	94
Natural gas, oil and other	88	98
Total inventory	1,006	921
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Materials and supplies	413	338
Coal	91	73
Natural gas, oil and other	69	66
Total inventory	573	477
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Materials and supplies	105	80
Coal	34	19
Natural gas, oil and other	5	17
Total inventory	144	116
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Materials and supplies	342	311
Coal	144	105
Natural gas, oil and other	3	2
Total inventory	489	418
Piedmont
Public Utilities, Inventory [Line Items]
Materials and supplies	12	14
Natural gas, oil and other	160	95
Total inventory	$ 172	$ 109

Summary of Significant Accoun_7

Summary of Significant Accounting Policies (Property, Plant and Equipment) (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	3%	2.90%	3%
Duke Energy Carolinas
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	2.70%	2.70%	2.80%
Progress Energy
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	3.20%	3.10%	3.20%
Duke Energy Progress
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	3%	3%	3.10%
Duke Energy Florida
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	3.50%	3.30%	3.30%
Duke Energy Ohio
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	2.90%	2.90%	2.90%
Duke Energy Indiana
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	3.60%	3.60%	3.50%
Piedmont
Public Utility, Property, Plant and Equipment [Line Items]
Weighted-average depreciation rate	2.10%	2.10%	2.30%

Summary of Significant Accoun_8

Summary of Significant Accounting Policies (Accounts Payable and Supplier Invoices Sold) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	$ 87	$ 19
Suppliers Invoices Settled Through The Program	301	122
Duke Energy Carolinas
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	6
Suppliers Invoices Settled Through The Program	29
Progress Energy
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	19	9
Suppliers Invoices Settled Through The Program	85	10
Duke Energy Progress
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	8
Suppliers Invoices Settled Through The Program	26
Duke Energy Florida
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	11	9
Suppliers Invoices Settled Through The Program	59	10
Duke Energy Ohio
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	5	6
Suppliers Invoices Settled Through The Program	38	12
Duke Energy Indiana
Payables [Line Items]
Suppliers Invoices Settled Through The Program	2
Piedmont
Payables [Line Items]
Outstanding Accounts Payable Balance Sold	57	4
Suppliers Invoices Settled Through The Program	$ 147	$ 100

Summary of Significant Accoun_9

Summary of Significant Accounting Policies (Excise Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization And Basis Of Presentation [Line Items]
Excise taxes	$ 449	$ 420	$ 415
Duke Energy Carolinas
Organization And Basis Of Presentation [Line Items]
Excise taxes	47	44	43
Progress Energy
Organization And Basis Of Presentation [Line Items]
Excise taxes	290	250	249
Duke Energy Progress
Organization And Basis Of Presentation [Line Items]
Excise taxes	25	22	26
Duke Energy Florida
Organization And Basis Of Presentation [Line Items]
Excise taxes	265	228	223
Duke Energy Ohio
Organization And Basis Of Presentation [Line Items]
Excise taxes	104	102	96
Duke Energy Indiana
Organization And Basis Of Presentation [Line Items]
Excise taxes	7	23	25
Piedmont
Organization And Basis Of Presentation [Line Items]
Excise taxes	$ 1	$ 1	$ 2

Summary of Significant Accou_10

Summary of Significant Accounting Policies (Expected Reserve for Credit Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	$ 49,184	$ 51,853	$ 51,136	$ 47,951
Accounting Standards Update [Extensible List]	ASU 2016-13
Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	$ 120
Duke Energy Carolinas | Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	16
Progress Energy
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	16,241	21,406	17,148	15,593
Progress Energy | Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	2
Duke Energy Progress | Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	1
Duke Energy Florida | Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	1
Piedmont
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	2,715	$ 3,673	$ 3,349	$ 2,443
Piedmont | Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total pretax impact to Retained Earnings	$ 1

Summary of Significant Accou_11

Summary of Significant Accounting Policies (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Assets [Line Items]
Other (including amounts related to VIEs)	$ 3,400	$ 3,632
Renewable Energy Program
Offsetting Assets [Line Items]
Other (including amounts related to VIEs)	$ 150

Dispositions (Duke Energy Disco

Dispositions (Duke Energy Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations, net of tax	$ (1,293)	$ 3	$ (18)	$ (15)	$ (36)	$ (57)	$ (25)	$ (26)	$ (1,323)	$ (144)	$ (7)
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations, net of tax									(1,323)	(144)	(7)
Discontinued Operations, Held-for-sale | Commercial Renewables Disposal Groups
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations, net of tax									(1,349)	(151)	(14)
Discontinued Operations, Held-for-sale | Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations, net of tax									$ 26	$ 7	$ 7

Dispositions (Narrative) (Detai

Dispositions (Narrative) (Details) $ in Millions					1 Months Ended		12 Months Ended
		Jul. 01, 2023 USD ($)	Sep. 08, 2021 USD ($)	Jan. 28, 2021 USD ($) closing	Dec. 31, 2022 USD ($)	Nov. 30, 2022 Units	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-Term Debt					$ 67,061		$ 67,061	$ 60,448
Sale of noncontrolling interest	[1]						1,034	999
Noncontrolling Interests
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of noncontrolling interest	[1]						$ 569	454
Duke Energy Indiana | Noncontrolling Interests
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage sold				19.90%
Number of closings | closing				2
Value of sale of parent interest			$ 1,030	$ 2,050	$ 1,030
Ownership interest sold (as a percentage)			11.05%		8.85%		8.85%
Proceed of purchase price for exchange in interest			50%
Transaction costs			$ 27		$ 6
Sale of noncontrolling interest			$ 545		492
Commercial Renewables Disposal Groups | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of disposal groups | Units						2
Noncontrolling interest balance					1,600		$ 1,600
Gain on disposal					72		72
Contract adjustments					95		95
Receivables, net					107		107	$ 87
Commercial Renewables Disposal Groups | Discontinued Operations, Held-for-sale | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on extinguishment of debt		$ 100
Commercial Renewables Disposal Groups | Discontinued Operations, Held-for-sale | Duke
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal					54		54
Commercial Renewables Disposal Groups | Discontinued Operations, Held-for-sale | Duke | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on extinguishment of debt		$ 55
Commercial Renewables Disposal Groups | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Duke
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-Term Debt					$ 1,500		$ 1,500
[1]Relates primarily to the sale of a noncontrolling interest in Duke Energy Indiana. See Note 2 for additional discussion.

Dispositions (Balance Sheet) (D

Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current Assets Held for Sale
Total current assets held for sale	$ 262	$ 232
Noncurrent Assets Held for Sale
Total other noncurrent assets held for sale	5,634	6,695
Current Liabilities Associated with Assets Held for Sale
Total current liabilities associated with assets held for sale	259	167
Noncurrent Liabilities Associated with Assets Held for Sale
Total other noncurrent liabilities associated with assets held for sale	739	612
Discontinued Operations, Held-for-sale | Commercial Renewables Disposal Groups
Current Assets Held for Sale
Cash and cash equivalents	10	3
Receivables, net	107	87
Inventory	88	86
Other	57	56
Total current assets held for sale	262	232
Noncurrent Assets Held for Sale
Cost	6,444	7,323
Accumulated depreciation and amortization	(1,651)	(1,452)
Net property, plant and equipment	4,793	5,871
Operating lease right-of-use assets, net	140	130
Investments in equity method unconsolidated affiliates	522	513
Other	179	181
Total other noncurrent assets held for sale	841	824
Total Assets Held for Sale	5,896	6,927
Current Liabilities Associated with Assets Held for Sale
Accounts payable	122	98
Taxes accrued	17	18
Other	120	51
Total current liabilities associated with assets held for sale	259	167
Noncurrent Liabilities Associated with Assets Held for Sale
Operating lease liabilities	150	134
Asset retirement obligations	190	175
Other	399	303
Total other noncurrent liabilities associated with assets held for sale	739	612
Total Liabilities Associated with Assets Held for Sale	$ 998	$ 779

Dispositions (Income Statement)

Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax benefit									$ (503)	$ (76)	$ (65)
Loss from discontinued operations	$ (1,293)	$ 3	$ (18)	$ (15)	$ (36)	$ (57)	$ (25)	$ (26)	(1,323)	(144)	(7)
Add: Net loss attributable to noncontrolling interest included in discontinued operations									108	344	296
Net income from discontinued operations attributable to Duke Energy Corporation									(1,215)	200	289
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations									(1,323)	(144)	(7)
Discontinued Operations, Held-for-sale | Commercial Renewables Disposal Groups
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues									465	476	502
Operation, maintenance and other									337	343	292
Depreciation and amortization									201	227	200
Property and other taxes									36	34	26
Other income and expenses, net									2	(27)	1
Interest expense									10	72	66
Loss on disposal									1,748	0	0
Loss before income taxes									(1,865)	(227)	(81)
Income tax benefit									(516)	(76)	(67)
Loss from discontinued operations									(1,349)	(151)	(14)
Add: Net loss attributable to noncontrolling interest included in discontinued operations									108	344	296
Net income from discontinued operations attributable to Duke Energy Corporation									$ (1,241)	$ 193	$ 282

Dispositions (Cash Flow Stateme

Dispositions (Cash Flow Statement) (Details) - Commercial Renewables Disposal Groups - Discontinued Operations, Held-for-sale - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Activities	$ 213	$ 62	$ 466
Investing Activities	$ (802)	$ (542)	$ (1,102)

Business Segments (Business Seg

Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues	$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	$ 28,768	$ 24,621	$ 23,366
Interest expense									2,439	2,207	2,097
Depreciation and amortization									5,086	4,762	4,504
Equity in earnings (losses) of unconsolidated affiliates									113	62	(2,005)
Income tax expense (benefit) from continuing operations									300	268	(169)
Segment income (loss)									3,659	3,602	981
Less noncontrolling interest									95	329	295
Add back preferred stock dividend									106	106	107
Net income from discontinued operations attributable to Duke Energy Corporation									(1,215)	200	289
Loss from discontinued operations, net of tax	(1,293)	3	(18)	(15)	(36)	(57)	(25)	(26)	(1,323)	(144)	(7)
Net income	(658)	$ 1,413	$ 880	$ 820	664	$ 1,276	$ 698	$ 941	2,455	3,579	1,082
Net loss attributable to Duke Energy									2,550	3,908	1,377
Capital expenditures									11,419	9,752	10,421
Segment assets	178,086				169,587				178,086	169,587	162,388
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									4,078	3,991	920
Nonregulated electric and other									285	294	263
Regulated electric									(25,759)	(22,319)	(21,461)
Income (loss) attributable to noncontrolling interest									(95)	(329)	(295)
Duke Energy Indiana
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									3,922	3,174	2,795
Interest expense									189	196	161
Depreciation and amortization									645	615	569
Income tax expense (benefit) from continuing operations									(24)	107	84
Net loss attributable to Duke Energy									137	481	408
Segment assets	14,654				14,488				14,654	14,488
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									113	588	492
Duke Energy Ohio
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									2,514	2,037	1,858
Interest expense									129	111	102
Depreciation and amortization									324	307	278
Income tax expense (benefit) from continuing operations									(21)	30	43
Segment income (loss)									302	204	252
Net loss attributable to Duke Energy									302	204	252
Capital expenditures									850	848	834
Segment assets	11,506				10,774				11,506	10,774	10,025
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges									(10)	25
Total income (loss) from continuing operations before income taxes									281	234	295
Regulated electric									(1,798)	(1,493)	(1,405)
Duke Energy Carolinas
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									7,857	7,102	7,015
Interest expense									557	538	487
Depreciation and amortization									1,526	1,468	1,462
Income tax expense (benefit) from continuing operations									126	51	88
Net loss attributable to Duke Energy									1,600	1,336	956
Segment assets	50,346				47,162				50,346	47,162
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									1,726	1,387	1,044
Duke Energy Progress
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									6,753	5,780	5,422
Interest expense									354	306	269
Depreciation and amortization									1,187	1,097	1,116
Income tax expense (benefit) from continuing operations									158	75	(36)
Net loss attributable to Duke Energy									1,008	991	415
Segment assets	36,752				35,383				36,752	35,383
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									1,166	1,066	379
Eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									(218)	(207)	(201)
Interest expense									(86)	(10)	(15)
Depreciation and amortization									(27)	(28)	(29)
Segment income (loss)									(1)	(3)	(4)
Segment assets											0
Eliminations | Duke Energy Ohio
Segment Reporting Information, Profit (Loss) [Abstract]
Segment assets	(176)				(29)				(176)	(29)	(2)
Electric Utilities and Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									25,990	22,570	21,687
Equity in earnings (losses) of unconsolidated affiliates									7	7	(1)
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges											948
Reduction of prior year impairment											152
Shareholder contribution expense											16
Electric Utilities and Infrastructure | Duke Energy Indiana
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges									386
Regulated electric									46
Income (loss) attributable to noncontrolling interest									34
Electric Utilities and Infrastructure | Gas Pipeline Assets
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges											5
Electric Utilities and Infrastructure | Clemson University Combined Heat and Power Plant
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges											19
Electric Utilities and Infrastructure | Operating Segments
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									26,024	22,603	21,720
Interest expense									1,565	1,432	1,320
Depreciation and amortization									4,550	4,251	4,068
Equity in earnings (losses) of unconsolidated affiliates									7	7	(1)
Income tax expense (benefit) from continuing operations									536	494	340
Segment income (loss)									3,929	3,850	2,669
Capital expenditures									8,985	7,653	7,629
Segment assets	152,104				143,841				152,104	143,841	138,225
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Ohio
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									1,798	1,493	1,405
Interest expense									86	87	85
Depreciation and amortization									221	217	200
Income tax expense (benefit) from continuing operations									24	15	19
Segment income (loss)									189	141	162
Capital expenditures									488	486	548
Segment assets	7,504				6,882				7,504	6,882	6,615
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Impairment Charges
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges										160
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Other Income and Expense
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										77
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Operation, Maintenance and Other
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										5
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Regulated Operating Revenue, Electric, Non-Nuclear
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										13
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Interest Expense
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										3
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Depreciation and amortization
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										6
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Impairment Charges
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges										42
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Other Income and Expense
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										34
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Operation, Maintenance and Other
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										7
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Regulated Operating Revenue, Electric, Non-Nuclear
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										15
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Interest Expense
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										5
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Depreciation and amortization
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										1
Electric Utilities and Infrastructure | Eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									34	33	33
Gas Utilities and Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									2,748	2,022	1,653
Equity in earnings (losses) of unconsolidated affiliates									21	8	(2,017)
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges											7
Gas Utilities and Infrastructure | After-tax impairment charge
Segment Reporting Information, Profit (Loss) [Abstract]
Equity in earnings (losses) of unconsolidated affiliates											2,100
Gas Utilities and Infrastructure | Operating Segments
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									2,840	2,112	1,748
Interest expense									182	142	135
Depreciation and amortization									327	303	258
Equity in earnings (losses) of unconsolidated affiliates									20	8	(2,017)
Income tax expense (benefit) from continuing operations									8	55	(349)
Segment income (loss)									468	396	(1,266)
Capital expenditures									1,295	1,271	1,309
Segment assets	16,411				15,179				16,411	15,179	13,849
Gas Utilities and Infrastructure | Operating Segments | Duke Energy Ohio
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									716	544	453
Interest expense									43	24	17
Depreciation and amortization									103	90	78
Income tax expense (benefit) from continuing operations									(43)	19	26
Segment income (loss)									121	78	96
Capital expenditures									362	362	286
Segment assets	4,164				3,892				4,164	3,892	3,380
Gas Utilities and Infrastructure | Operating Segments | Gas Pipeline Assets
Segment Reporting Information, Profit (Loss) [Abstract]
Equity in earnings (losses) of unconsolidated affiliates										20
Gas Utilities and Infrastructure | Eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									92	90	95
Total Reportable Segments
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									28,738	24,592	23,340
Total Reportable Segments | Operating Segments
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									28,864	24,715	23,468
Interest expense									1,747	1,574	1,455
Depreciation and amortization									4,877	4,554	4,326
Equity in earnings (losses) of unconsolidated affiliates									27	15	(2,018)
Income tax expense (benefit) from continuing operations									544	549	(9)
Segment income (loss)									4,397	4,246	1,403
Capital expenditures									10,280	8,924	8,938
Segment assets	168,515				159,020				168,515	159,020	152,074
Total Reportable Segments | Operating Segments | Duke Energy Ohio
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									2,514	2,037	1,858
Interest expense									129	111	102
Depreciation and amortization									324	307	278
Income tax expense (benefit) from continuing operations									(19)	34	45
Segment income (loss)									310	219	258
Capital expenditures									850	848	834
Segment assets	11,668				10,774				11,668	10,774	9,995
Total Reportable Segments | Eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									126	123	128
Other
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									30	29	26
Segment Reporting Information Assets [Abstract]
Severance charge reversal											98
Other | Operating Segments | Impairment Charges
Segment Reporting Information Assets [Abstract]
Impairment of assets and other charges									72	133
Other | Operating Segments | Operation, Maintenance and Other
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									71	42
Other | Operating Segments | Depreciation and amortization
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes										17
Other | Operating Segments | Litigation Expense
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									25
Other | Operating Segments | Gain (Loss) on Disposition of Assets
Segment Reporting Information Assets [Abstract]
Total income (loss) from continuing operations before income taxes									7
Other | Other
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									122	113	99
Interest expense									778	643	657
Depreciation and amortization									236	236	207
Equity in earnings (losses) of unconsolidated affiliates									86	47	13
Income tax expense (benefit) from continuing operations									(244)	(281)	(160)
Segment income (loss)									(737)	(641)	(418)
Capital expenditures									1,139	828	1,483
Segment assets	9,571				10,567				9,571	10,567	10,314
Other | Other | Duke Energy Ohio
Segment Reporting Information, Profit (Loss) [Abstract]
Income tax expense (benefit) from continuing operations									(2)	(4)	(2)
Segment income (loss)									(8)	(15)	(6)
Segment assets	$ 14				$ 29				14	29	32
Other | Eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues									$ 92	$ 84	$ 73

Business Segments (Narrative) (

Business Segments (Narrative) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) Segment segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	$ 28,768	$ 24,621	$ 23,366
Number of reportable segments | Segment									2
Duke Energy Progress
Segment Reporting Information [Line Items]
Revenues									$ 6,753	5,780	5,422
Number of reportable segments | segment									1
Duke Energy Ohio
Segment Reporting Information [Line Items]
Revenues									$ 2,514	$ 2,037	$ 1,858
Number of reportable segments | segment									2
Revenues | Duke Energy Progress | Customer Concentration | One customer
Segment Reporting Information [Line Items]
Revenues									$ 684

Business Segments (Schedule of

Business Segments (Schedule of Revenue, By Products and Services) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	$ 28,768	$ 24,621	$ 23,366
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									25,990	22,570	21,687
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									2,748	2,022	1,653
Total Reportable Segments
Segment Reporting Information [Line Items]
Revenues									28,738	24,592	23,340
Retail Electric
Segment Reporting Information [Line Items]
Revenues									22,036	19,410	18,898
Retail Electric | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									22,036	19,410	18,898
Wholesale Electric
Segment Reporting Information [Line Items]
Revenues									2,882	2,216	1,878
Wholesale Electric | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									2,882	2,216	1,878
Retail Natural Gas
Segment Reporting Information [Line Items]
Revenues									2,535	2,025	1,691
Retail Natural Gas | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									2,535	2,025	1,691
Other
Segment Reporting Information [Line Items]
Revenues									1,411	1,064	1,001
Other | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									1,106	977	944
Other | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									305	87	57
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									26,024	22,603	21,720
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Revenues									2,840	2,112	1,748
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Revenues									$ 28,864	$ 24,715	$ 23,468

Regulatory Matters (Schedule of

Regulatory Matters (Schedule of Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions	Jan. 31, 2023	Dec. 31, 2022	Aug. 31, 2022	Jul. 31, 2022	May 31, 2022	Apr. 30, 2022	Dec. 31, 2021
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		$ 18,130					$ 14,637
Less: current portion		3,485					2,150
Total noncurrent regulatory assets		14,645					12,487
Total regulatory liabilities		15,048					17,363
Less: current portion		1,466					1,211
Total noncurrent regulatory liabilities		13,582					16,152
Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		6,462					7,199
Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		5,151					6,150
AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		1,038					2,053
Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		683					364
Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		211					213
DOE Settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		154
Provision for rate refunds
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		78					274
Amounts to be refunded to customers
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		45
Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		1,226					1,110
AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		3,205					3,408
AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		945					684
Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		3,866					1,253
Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		2,336					2,017
Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		940					991
Nuclear asset securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		881					937
Debt fair value adjustment
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		829					884
Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		666					213
Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		378					348
Post-in-service carrying costs (PISCC) and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		342					356
Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		316					357
Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		288					317
Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		283					311
Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		271					242
Costs of removal regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		221					107
Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		222					221
Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		210					87
CEP deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		190					161
Demand side management (DSM)/Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		189					235
Derivatives – natural gas supply contracts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		168					139
NCEMPA deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		157					165
Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		154					120
Deferred pipeline integrity costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		121					108
COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		120					123
Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		92					90
Qualifying facility contract buyouts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		81					94
Amounts due from customers
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		57					85
Propane caverns
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		26
Deferred severance charges
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		21					54
Manufactured gas plant (MGP)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets							104
Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		555					426
Progress Energy
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		8,979					6,939
Less: current portion		1,833					1,030
Total noncurrent regulatory assets		7,146					5,909
Total regulatory liabilities		5,329					6,044
Less: current portion		576					478
Total noncurrent regulatory liabilities		4,753					5,566
Progress Energy | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		2,192					2,394
Progress Energy | Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		2,269					2,955
Progress Energy | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		252					155
Progress Energy | DOE Settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		154
Progress Energy | Provision for rate refunds
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		28					87
Progress Energy | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		434					453
Progress Energy | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,429					1,399
Progress Energy | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		884					620
Progress Energy | Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		2,060					718
Progress Energy | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		759					725
Progress Energy | Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		720					759
Progress Energy | Nuclear asset securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		881					937
Progress Energy | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		559					189
Progress Energy | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		128					137
Progress Energy | Post-in-service carrying costs (PISCC) and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		42					47
Progress Energy | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		243					265
Progress Energy | Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		21					21
Progress Energy | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		111					130
Progress Energy | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		136					124
Progress Energy | Costs of removal regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		221					107
Progress Energy | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		43					42
Progress Energy | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		78					28
Progress Energy | Demand side management (DSM)/Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		188					230
Progress Energy | NCEMPA deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		157					165
Progress Energy | Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		64					42
Progress Energy | COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		32					32
Progress Energy | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		25					23
Progress Energy | Qualifying facility contract buyouts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		81					94
Progress Energy | Deferred severance charges
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		7					18
Progress Energy | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		110					87
Duke Energy Carolinas
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		5,388					3,479
Less: current portion		1,095					544
Total noncurrent regulatory assets		4,293					2,935
Total regulatory liabilities		6,313					7,685
Less: current portion		530					487
Total noncurrent regulatory liabilities		5,783					7,198
Duke Energy Carolinas | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		2,475					2,785
Duke Energy Carolinas | Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		1,769					2,009
Duke Energy Carolinas | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		1,038					2,053
Duke Energy Carolinas | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		350					209
Duke Energy Carolinas | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		44					44
Duke Energy Carolinas | Provision for rate refunds
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		50					124
Duke Energy Carolinas | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		587					461
Duke Energy Carolinas | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,391					1,227
Duke Energy Carolinas | Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,614					339
Duke Energy Carolinas | Deferred Fuel Costs | NCUC
Regulatory Assets Liabilities [Line Items]
Total regulatory assets					$ 327
Duke Energy Carolinas | Deferred Fuel Costs | PSCSC
Regulatory Assets Liabilities [Line Items]
Total regulatory assets				$ 79
Duke Energy Carolinas | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		614					365
Duke Energy Carolinas | Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		220					232
Duke Energy Carolinas | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		93					22
Duke Energy Carolinas | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		228					171
Duke Energy Carolinas | Post-in-service carrying costs (PISCC) and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		30					31
Duke Energy Carolinas | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		39					54
Duke Energy Carolinas | Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		267					296
Duke Energy Carolinas | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		139					140
Duke Energy Carolinas | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		62					66
Duke Energy Carolinas | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		84					83
Duke Energy Carolinas | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		127					51
Duke Energy Carolinas | Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		90					78
Duke Energy Carolinas | COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		88					91
Duke Energy Carolinas | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		67					67
Duke Energy Carolinas | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		235					166
Duke Energy Progress
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		5,414					4,651
Less: current portion		690					533
Total noncurrent regulatory assets		4,724					4,118
Total regulatory liabilities		4,452					5,249
Less: current portion		332					381
Total noncurrent regulatory liabilities		4,120					4,868
Duke Energy Progress | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		1,559					1,695
Duke Energy Progress | Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		2,269					2,955
Duke Energy Progress | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		252					155
Duke Energy Progress | Provision for rate refunds
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		28					87
Duke Energy Progress | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		344					357
Duke Energy Progress | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,418					1,389
Duke Energy Progress | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		869					613
Duke Energy Progress | Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		705					303
Duke Energy Progress | Deferred Fuel Costs | NCUC
Regulatory Assets Liabilities [Line Items]
Total regulatory assets			$ 251
Duke Energy Progress | Deferred Fuel Costs | PSCSC
Regulatory Assets Liabilities [Line Items]
Total regulatory assets						$ 44
Duke Energy Progress | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		417					351
Duke Energy Progress | Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		720					759
Duke Energy Progress | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		234					170
Duke Energy Progress | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		55					60
Duke Energy Progress | Post-in-service carrying costs (PISCC) and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		42					47
Duke Energy Progress | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		149					171
Duke Energy Progress | Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		21					21
Duke Energy Progress | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		81					92
Duke Energy Progress | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		54					57
Duke Energy Progress | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		43					42
Duke Energy Progress | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		78					28
Duke Energy Progress | Demand side management (DSM)/Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		180					218
Duke Energy Progress | NCEMPA deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		157					165
Duke Energy Progress | Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		64					42
Duke Energy Progress | COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		32					32
Duke Energy Progress | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		25					23
Duke Energy Progress | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		70					68
Duke Energy Florida
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		3,565					2,288
Less: current portion		1,143					497
Total noncurrent regulatory assets		2,422					1,791
Total regulatory liabilities		877					796
Less: current portion		244					98
Total noncurrent regulatory liabilities		633					698
Duke Energy Florida | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		633					699
Duke Energy Florida | DOE Settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		154
Duke Energy Florida | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		90					97
Duke Energy Florida | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		11					10
Duke Energy Florida | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		15					7
Duke Energy Florida | Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,355					415
Duke Energy Florida | Deferred Fuel Costs | FPSC
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,200
Duke Energy Florida | Deferred Fuel Costs | FPSC | Subsequent Event
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	$ 795
Duke Energy Florida | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		342					374
Duke Energy Florida | Nuclear asset securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		881					937
Duke Energy Florida | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		325					19
Duke Energy Florida | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		73					77
Duke Energy Florida | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		94					94
Duke Energy Florida | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		30					38
Duke Energy Florida | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		82					67
Duke Energy Florida | Costs of removal regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		221					107
Duke Energy Florida | Qualifying facility contract buyouts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		81					94
Duke Energy Florida | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		55					49
Duke Energy Ohio
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		684					707
Less: current portion		103					72
Total noncurrent regulatory assets		581					635
Total regulatory liabilities		633					801
Less: current portion		99					62
Total noncurrent regulatory liabilities		534					739
Duke Energy Ohio | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		496					602
Duke Energy Ohio | Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		9					39
Duke Energy Ohio | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		21					21
Duke Energy Ohio | Provision for rate refunds
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities							61
Duke Energy Ohio | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		107					78
Duke Energy Ohio | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets							33
Duke Energy Ohio | Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		54					38
Duke Energy Ohio | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		129					133
Duke Energy Ohio | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		14					2
Duke Energy Ohio | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		2					5
Duke Energy Ohio | Post-in-service carrying costs (PISCC) and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		15					16
Duke Energy Ohio | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		18					24
Duke Energy Ohio | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		54					41
Duke Energy Ohio | CEP deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		190					161
Duke Energy Ohio | Deferred pipeline integrity costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		28					24
Duke Energy Ohio | Propane caverns
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		26
Duke Energy Ohio | Manufactured gas plant (MGP)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets							104
Duke Energy Ohio | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		154					126
Duke Energy Indiana
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		1,124					1,555
Less: current portion		249					277
Total noncurrent regulatory assets		875					1,278
Total regulatory liabilities		1,641					1,692
Less: current portion		187					127
Total noncurrent regulatory liabilities		1,454					1,565
Duke Energy Indiana | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		840					908
Duke Energy Indiana | Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		531					575
Duke Energy Indiana | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		81
Duke Energy Indiana | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		104					113
Duke Energy Indiana | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		85					96
Duke Energy Indiana | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		385					749
Duke Energy Indiana | Deferred Fuel Costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		138					158
Duke Energy Indiana | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		214					222
Duke Energy Indiana | Hedge cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		20					35
Duke Energy Indiana | Post-in-service carrying costs (PISCC) and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		255					262
Duke Energy Indiana | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		34					38
Duke Energy Indiana | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		15					17
Duke Energy Indiana | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		19					11
Duke Energy Indiana | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		44					63
Piedmont
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		511					457
Less: current portion		119					141
Total noncurrent regulatory assets		392					316
Total regulatory liabilities		1,098					1,114
Less: current portion		74					56
Total noncurrent regulatory liabilities		1,024					1,058
Piedmont | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		459					510
Piedmont | Costs of removal
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		573					572
Piedmont | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		66					32
Piedmont | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		27					22
Piedmont | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		119					82
Piedmont | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		12					12
Piedmont | Derivatives – natural gas supply contracts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		168					139
Piedmont | Deferred pipeline integrity costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		93					84
Piedmont | Amounts due from customers
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		57					85
Piedmont | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		$ 35					$ 33

Regulatory Matters (Duke Energy

Regulatory Matters (Duke Energy Narrative) (Details) customer in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 30, 2022	Sep. 30, 2022 customer	Aug. 05, 2022 USD ($)	Oct. 13, 2021
Public Utilities, General Disclosures [Line Items]
Capital expenditures		$ 11,419	$ 9,752	$ 10,421
Regulatory assets		$ 18,130	14,637
Storm Cost Securitization Legislation | NCUC
Public Utilities, General Disclosures [Line Items]
Reduction in CO2 emissions (as a percent)								70%
Solar storage as long term purchase agreements (as a percent)					45%
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Limit of total capital (as a percent)		30%
Capital expenditures		$ 850	848	$ 834
Regulatory assets		$ 684	707
Duke Energy Kentucky
Public Utilities, General Disclosures [Line Items]
Required minimum equity capital structure (as a percent)		35%
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Number of customers impacted | customer						950
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events | Minimum
Public Utilities, General Disclosures [Line Items]
Storm costs incurred	$ 100
Capital expenditures	9
Regulatory assets	83
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 5,414	4,651
Duke Energy Progress | Storm Cost Securitization Legislation | PSCSC
Public Utilities, General Disclosures [Line Items]
Deferred storm costs							$ 223
Duke Energy Progress | Natural Disasters and Other Casualty Events | Minimum
Public Utilities, General Disclosures [Line Items]
Regulatory assets	43
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 5,388	$ 3,479
Duke Energy Carolinas | Natural Disasters and Other Casualty Events | Minimum
Public Utilities, General Disclosures [Line Items]
Regulatory assets	$ 40

Regulatory Matters (Duke Ener_2

Regulatory Matters (Duke Energy Carolinas Narrative) (Details) $ in Millions

7 Months Ended

11 Months Ended

12 Months Ended

Oct. 06, 2022

Sep. 27, 2021 contention

Jul. 28, 2021

Jun. 07, 2021

Jun. 06, 2021

Dec. 31, 2025 USD ($)

Dec. 31, 2026 USD ($)

May 31, 2027

May 31, 2026 USD ($)

Jan. 18, 2026 USD ($)

May 31, 2025 USD ($)

Jan. 18, 2025 USD ($)

May 31, 2024 USD ($)

Jan. 18, 2024 USD ($)

Dec. 31, 2022

Nuclear Regulatory Commission

Public Utilities, General Disclosures [Line Items]

Operating license extension (in years)

20 years

Oconee Nuclear Station Subsequent License Renewal | Duke Energy Carolinas | Nuclear Regulatory Commission

Public Utilities, General Disclosures [Line Items]

Comment period (in years)

60 days

Number of contentions | contention

3

Oconee Nuclear Station Subsequent License Renewal | Duke Energy Carolinas | Oconee | Nuclear Regulatory Commission

Public Utilities, General Disclosures [Line Items]

Operating license extension (in years)

20 years

Operating license (in years)

80 years

60 years

2022 North Carolina Rate Case | Duke Energy Carolinas | NCUC | Forecast

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease)

$ 823

$ 150

$ 172

Requested return on equity, percentage

15.70%

2022 North Carolina Rate Case | Duke Energy Carolinas | NCUC | Subsequent Event | Forecast

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease)

$ 501

2022 North Carolina Rate Case | Duke Energy Progress | NCUC

Public Utilities, General Disclosures [Line Items]

Proposed rate period (in years)

3 years

2022 North Carolina Rate Case | Duke Energy Progress | NCUC | Forecast

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease)

$ 615

$ 138

$ 151

$ 326

Requested return on equity, percentage

16%

Regulatory Matters (Duke Ener_3

Regulatory Matters (Duke Energy Progress Narrative) (Details) - USD ($) $ in Millions					7 Months Ended	12 Months Ended
	Oct. 06, 2022	Sep. 01, 2022	Jun. 16, 2022	Oct. 16, 2020	Dec. 31, 2025	May 31, 2027	May 31, 2026	May 31, 2025	May 31, 2024	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
Other, estimated useful life, in years										15 years	14 years
Duke Energy Progress | PSCSC | 2022 South Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission		$ 52
Duke Energy Progress | PSCSC | 2022 South Carolina Rate Case, Retail Rate Case
Public Utilities, General Disclosures [Line Items]
Deferred compliance costs period (in years)		33 months
Approved return on equity, percentage		9.60%
Approved rate increase (decrease) amount by state commission		$ 36
Duke Energy Progress | PSCSC | 2022 South Carolina Rate Case, Retail Rate Case | Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage		52.43%
Duke Energy Progress | PSCSC | 2022 South Carolina Rate Case, Retail Rate Case | Debt
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage		47.57%
Duke Energy Progress | PSCSC | 2022 South Carolina Rate Case, Coal Ash Basin Closure Costs
Public Utilities, General Disclosures [Line Items]
Deferred compliance costs period (in years)		7 years
Deferred costs not recovering		$ 50
Duke Energy Progress | NCUC | 2022 North Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)	3 years
Duke Energy Progress | NCUC | 2022 North Carolina Rate Case | Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)					$ 615		$ 138	$ 151	$ 326
Requested return on equity, percentage						16%
Duke Energy Progress | FERC | FERC Return on Equity Complaint, NCEMC
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage			10%	11%

Regulatory Matters (Duke Ener_4

Regulatory Matters (Duke Energy Florida Narrative) (Details) - Duke Energy Florida

12 Months Ended

Oct. 17, 2022 USD ($)

Oct. 04, 2022 USD ($)

Jun. 15, 2022 USD ($)

Jan. 14, 2021 USD ($)

Jul. 01, 2020 USD ($) plant MW

Dec. 31, 2025 USD ($)

Dec. 31, 2024 USD ($)

Dec. 31, 2023 USD ($)

Dec. 31, 2022 USD ($)

Sep. 28, 2022 outage

Sep. 27, 2022 USD ($)

Apr. 11, 2022 USD ($)

May 04, 2021 USD ($)

Solar Plant

Public Utilities, General Disclosures [Line Items]

Estimated cost of generation facilities to be built

$ 1,000,000,000

FPSC

Public Utilities, General Disclosures [Line Items]

Number of solar plants petition for approval | plant

10

Solar generation capacity plants (in MW) | MW

750

FPSC | Natural Disasters and Other Casualty Events

Public Utilities, General Disclosures [Line Items]

Deferred storm coats

$ 353,000,000

Number of outages | outage

1,100,000

Storm reserves

132,000,000

$ 107,000,000

Expected recovery payments to be received

$ 442,000,000

2021 Settlement | FPSC

Public Utilities, General Disclosures [Line Items]

Approved capital structure, percentage

53%

Approved debt structure, percentage

47%

Public utilities, basis points, increase

0.25%

Contract asset, noncurrent

$ 154,000,000

$ 173,000,000

$ 173,000,000

Proceeds from legal settlements

$ 180,000,000

Future investments in new cost

$ 1,000,000,000

Requested rate increase (decrease)

$ (56,000,000)

2021 Settlement | FPSC | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Public utilities, basis points, increase

0.50%

2021 Settlement | FPSC | Minimum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

8.85%

2021 Settlement | FPSC | Minimum | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.85%

2021 Settlement | FPSC | Maximum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.85%

2021 Settlement | FPSC | Maximum | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.10%

2021 Settlement | FPSC | Weighted Average

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.85%

2021 Settlement | FPSC | Subsequent Event

Public Utilities, General Disclosures [Line Items]

Approved rate increase (decrease) amount by state commission

$ 79,000,000

$ 49,000,000

$ 67,000,000

Storm Protection Plan | FPSC

Public Utilities, General Disclosures [Line Items]

Investment in transmission and distribution

$ 7,000,000,000

Cost reduction to transmission loop

$ 80,000,000

Cost reduction period (in years)

10 years

Regulatory Matters (Duke Ener_5

Regulatory Matters (Duke Energy Ohio Narrative) (Details) $ in Millions						3 Months Ended								12 Months Ended
	Dec. 01, 2022 USD ($)	Sep. 19, 2022 USD ($)	Jul. 14, 2022 USD ($)	May 19, 2022 USD ($)	Oct. 01, 2021 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) site	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Apr. 27, 2022 USD ($)
Public Utilities, General Disclosures [Line Items]
Revenues						$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	$ 28,768	$ 24,621	$ 23,366
Operation, maintenance and other														5,734	5,703	5,502
Income tax expense (benefit) from continuing operations														300	268	(169)
Public utilities, property, plant and equipment, net						111,748				105,536				111,748	105,536
Asset impairment charges														434	353	978
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Revenues														2,514	2,037	1,858
Operation, maintenance and other														523	479	463
Income tax expense (benefit) from continuing operations														(21)	30	$ 43
Impairment (reversal) of assets and other charges														(10)	25
Public utilities, property, plant and equipment, net						9,247				$ 8,625				9,247	8,625
Asset impairment charges														(10)	25
Duke Energy Ohio | Duke Energy Ohio Electric Base Rate Case | Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)					$ 55
Requested return on equity, percentage					10.30%
Requested rate increase (decrease), percent					3.30%
Approved rate increase (decrease) amount by state commission		$ 23
Approved return on equity, percentage		9.50%
Duke Energy Ohio | Duke Energy Ohio Electric Base Rate Case | Public Utilities Commission Of Ohio | Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 2
Requested return on equity, percentage				8.84%
Duke Energy Ohio | Duke Energy Ohio Electric Base Rate Case | Public Utilities Commission Of Ohio | Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 15
Requested return on equity, percentage				9.85%
Duke Energy Ohio | Natural Gas Pipeline Extension | Ohio Power Siting Board | Minimum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC						$ 170								$ 170
Duke Energy Ohio | MGP Cost Recovery - 2009 Through 2012 | Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Number of environmental remediation sites | site														2
Duke Energy Ohio | MGP Cost Recovery - 2013 Through 2019 | Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Revenues														$ 15
Operation, maintenance and other														58
Income tax expense (benefit) from continuing operations														(72)
Duke Energy Ohio | Propane caverns
Public Utilities, General Disclosures [Line Items]
Impairment (reversal) of assets and other charges														(12)
Public utilities, property, plant and equipment, net																	$ 7
Asset impairment charges															$ 19
Duke Energy Ohio | Duke Energy Ohio Gas Base Rate Case | Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)			$ 49
Requested return on equity, percentage			10.30%
Requested rate increase (decrease), percent			5.60%
Duke Energy Ohio | Duke Energy Ohio Gas Base Rate Case | Public Utilities Commission Of Ohio | Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)														$ 24
Requested return on equity, percentage														9.03%
Duke Energy Ohio | Duke Energy Ohio Gas Base Rate Case | Public Utilities Commission Of Ohio | Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)														$ 36
Requested return on equity, percentage														10.04%
Equity ratio (as a percent)														52%
Duke Energy Ohio | Duke Energy Kentucky Electric Base Rate Case | KPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)	$ 75
Requested return on equity, percentage	10.35%
Requested rate increase (decrease), percent														17.80%

Regulatory Matters (Duke Ener_6

Regulatory Matters (Duke Energy Ohio - Exit Obligation Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
Regulatory assets	$ 18,130	$ 14,637
Restructuring Reserve [Roll Forward]
Balance, beginning of period	39	11
Cash Reductions	(8)	(8)
Balance, end of period	64	39
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Regulatory assets	$ 684	$ 707

Regulatory Matters (Duke Ener_7

Regulatory Matters (Duke Energy Indiana Narrative) (Details) - USD ($)				3 Months Ended								12 Months Ended
	Jun. 29, 2020	Dec. 04, 2019	Jul. 02, 2019	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 15, 2022
Public Utilities, General Disclosures [Line Items]
Revenues				$ 7,351,000,000	$ 7,842,000,000	$ 6,564,000,000	$ 7,011,000,000	$ 6,117,000,000	$ 6,834,000,000	$ 5,638,000,000	$ 6,032,000,000	$ 28,768,000,000	$ 24,621,000,000	$ 23,366,000,000
Asset impairment charges												434,000,000	353,000,000	978,000,000
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Revenues												3,922,000,000	3,174,000,000	$ 2,795,000,000
Asset impairment charges												388,000,000	9,000,000
Duke Energy Indiana | Indiana Utility Regulatory Commission | Indiana Rate Case 2019
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)			$ 395,000,000
Requested rate increase (decrease), percentage, net of tax		15.60%
Requested rate increase (decrease), amended, amount		$ 396,000,000
Approved rate increase (decrease) amount by state commission	$ 146,000,000
Disclosure of rate matters, rate base								$ 10,200,000,000					$ 10,200,000,000
Public utilities, disclosure of rate matters, rate base reduction due to depreciation methodology, percent	50%
Public utilities, disclosure of rate matters, rate base reduction due to approved return on equity, percent	20%
Approved return on equity percentage (as a percent)	9.70%
Requested return on equity, percentage	10.40%
Public utilities, disclosure of rate matters, rate base reduction due to earnings adjustments, percent	20%
Public utilities, disclosure of rate matters, reduction of rate base	$ 200,000,000
Public utilities, approved return on equity, step two estimated (as a percent)	25%
Public utilities, approved return on equity, step one estimated percentage	75%
Impairment of assets and other charges												211,000,000
Revenues												46,000,000
Duke Energy Indiana | Indiana Utility Regulatory Commission | TDSIG 2.0
Public Utilities, General Disclosures [Line Items]
Future investments in new cost															$ 2,000,000,000
Duke Energy Indiana | Indiana Utility Regulatory Commission | Indiana Coal Ash Recovery
Public Utilities, General Disclosures [Line Items]
Asset impairment charges												$ 175,000,000

Regulatory Matters (Piedmont Na

Regulatory Matters (Piedmont Narrative) (Details) - Piedmont - USD ($) $ in Millions				1 Months Ended
	Oct. 10, 2022	Sep. 15, 2022	Apr. 01, 2022	Oct. 31, 2022
2022 South Carolina Rate Case | PSCSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)			$ 7
Requested rate increase (decrease), percentage, net of tax			3.40%
Approved return on equity percentage (as a percent)		9.30%
Approved capital structure, percentage		52.20%
Approved debt structure, percentage		47.80%
Approved rate decrease amount by state commission				$ 1
Tennessee Annual Review Mechanism | TPUC
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)	9.80%

Regulatory Matters (Other Regul

Regulatory Matters (Other Regulatory Matters Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 28, 2021
Public Utilities, General Disclosures [Line Items]
Equity in losses of unconsolidated affiliates	$ (113)	$ (62)	$ 2,005
Other current liabilities	2,167	2,423
Asset retirement obligations	$ 773	$ 647
Atlantic Coast Pipeline (ACP)
Public Utilities, General Disclosures [Line Items]
Joint owner ownership percentage	47%
Atlantic Coast Pipeline (ACP) | Atlantic Coast Pipeline (ACP)
Public Utilities, General Disclosures [Line Items]
Equity in losses of unconsolidated affiliates			$ 2,100
Other current liabilities	$ 59
Other liabilities, noncurrent	47
Atlantic Coast Pipeline (ACP) | Atlantic Coast Pipeline (ACP) | Current Liabilities
Public Utilities, General Disclosures [Line Items]
Guarantor obligations settled				$ 855
Asset retirement obligations	$ 106

Regulatory Matters (Schedule _2

Regulatory Matters (Schedule of Net Carrying Value Of Facilities) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2034 asset	Dec. 31, 2022 USD ($) MW	Dec. 31, 2021 USD ($)
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 111,748	$ 105,536
Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		9,146
Remaining net book value		$ 6,293
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 35,981	34,122
Duke Energy Carolinas | Allen Steam Station Unit 1 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		167
Remaining net book value		$ 10
Duke Energy Carolinas | Allen Steam Station Unit 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		259
Remaining net book value		$ 233
Duke Energy Carolinas | Cliffside Unit 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		546
Remaining net book value		$ 344
Duke Energy Carolinas | Marshall Units 1 And 2 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		760
Remaining net book value		$ 428
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 24,674	23,657
Duke Energy Progress | Mayo Unit 1 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		713
Remaining net book value		$ 639
Duke Energy Progress | Roxboro Units 3-4 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		1,409
Remaining net book value		$ 425
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 19,563	18,046
Duke Energy Florida | Crystal River Units 4 and 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		1,442
Remaining net book value		$ 1,549
Duke Energy Florida | Crystal River Units 4 and 5 | Generating facilities planned for retirement | Forecast
Public Utilities, General Disclosures [Line Items]
Facilities retiring ahead of schedule | asset	2
Facilities retiring ahead of schedule, years ahead	8 years
Duke Energy Florida | Crystal River Units 4-5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Accelerated depreciation		200
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 12,100	$ 11,760
Duke Energy Indiana | Gibson Units 1 - 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		2,845
Remaining net book value		$ 2,043
Duke Energy Indiana | Cayuga Units 1 - 2 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		1,005
Remaining net book value		$ 622

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) $ in Millions		1 Months Ended		12 Months Ended
	Jun. 16, 2021 people	Jun. 30, 2022 USD ($)	Apr. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) case reactor	Dec. 31, 2021 USD ($)	Jun. 18, 2018 USD ($)
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				96
Insured public liability limit per nuclear incident				$ 13,700
Excess nuclear liability program coverage				13,200
Pro rata assessment for each reactor owned for each incident exceeding public liability insurance				138
Annual payment limit to pro rata assessments				20.5
Industry aggregate limit				3,200
Sublimit for non-nuclear terrorist events				1,800
Sublimit property damage losses				1,500
Additional nuclear accident limit				$ 1,250
Insurance coverage percentage initial weeks				100%
Accidental outage insurance coverage initial weeks				365 days
Insurance coverage percentage additional weeks				80%
Accidental outage insurance coverage additional weeks				770 days
Weeks of sublimits for accidental outage coverage				728 days
Sublimit accidental outage recovery				$ 328
Maximum magnitude of retroactive premiums				10
Maximum period for retroactive premium assessment (in years)				6 years
Texas Storm Uri Tort Litigation | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | case				5
Duke Energy Carolinas
Loss Contingencies [Line Items]
Primary nuclear liability program coverage				$ 450
Max retroactive premium assessments				$ 151
Duke Energy Carolinas | Catawba
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				2
Dedicated additional nuclear accident limit				$ 1,250
Additional Non-nuclear accident limit				750
Accidental outage insurance coverage policy limit				$ 490
Potential obligation percentage				100%
Duke Energy Carolinas | McGuire
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				2
Duke Energy Carolinas | Oconee
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				3
Additional Non-nuclear accident limit				$ 750
Duke Energy Carolinas | Ruben Villano, et al. v. Duke Energy Carolinas, LLC | Pending Litigation
Loss Contingencies [Line Items]
Number of individuals | people	9
Number of survivors | people	4
Number of deceased individuals | people	5
Duke Energy Carolinas | Asbestos Issue
Loss Contingencies [Line Items]
Asbestos-related injuries and damages reserves				457	$ 501
Loss contingency, receivable, noncurrent				595	$ 644
Duke Energy Progress
Loss Contingencies [Line Items]
Primary nuclear liability program coverage				450
Max retroactive premium assessments				$ 93
Duke Energy Progress | Harris
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				1
Duke Energy Progress | Robinson
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				1
Duke Energy Progress | Brunswick
Loss Contingencies [Line Items]
Number of licensed nuclear reactors | reactor				2
Duke Energy Progress | Spent Nuclear Fuel Matters
Loss Contingencies [Line Items]
Damages sought						$ 100
Amount awarded			$ 87
Duke Energy Florida
Loss Contingencies [Line Items]
Primary nuclear liability program coverage				$ 100
Max retroactive premium assessments				1
Duke Energy Florida | Crystal River Unit 3
Loss Contingencies [Line Items]
Sublimit property damage losses				50
Duke Energy Florida | Spent Nuclear Fuel Matters
Loss Contingencies [Line Items]
Damages sought						$ 200
Amount awarded		$ 180
Duke Energy and Duke Energy Carolinas | ASU 2016-13
Loss Contingencies [Line Items]
Premium receivable, allowance for credit loss				$ 12

Commitments and Contingencies_3

Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other (includes amounts related to VIEs)	Other (includes amounts related to VIEs)
Environmental reserves
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	$ 84	$ 88
Environmental reserves | Duke Energy Carolinas
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	22	19
Environmental reserves | Progress Energy
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	19	23
Environmental reserves | Duke Energy Progress
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	8	11
Environmental reserves | Duke Energy Florida
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	11	11
Environmental reserves | Duke Energy Ohio
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	33	34
Environmental reserves | Duke Energy Indiana
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	3	4
Environmental reserves | Piedmont
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	$ 7	$ 9

Commitments and Contingencies_4

Commitments and Contingencies (Purchased Power) (Details) - Purchased Power Contracts $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Duke Energy Progress
Unconditional Purchase Obligations [Abstract]
2023	$ 22
2024	21
2025	22
2026	18
2027	19
Thereafter	27
Total	$ 129
Duke Energy Progress | Minimum
Unconditional Purchase Obligations [Abstract]
Net plant output percent	18%
Duke Energy Progress | Maximum
Unconditional Purchase Obligations [Abstract]
Net plant output percent	100%
Duke Energy Florida
Unconditional Purchase Obligations [Abstract]
2023	$ 300
2024	267
2025	91
Total	$ 658
Net plant output percent	100%
Duke Energy Ohio
Unconditional Purchase Obligations [Abstract]
2023	$ 55
2024	36
Total	$ 91

Commitments and Contingencies_5

Commitments and Contingencies (Gas Supply Contracts) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Maximum | Pipeline and storage capacity contracts
Long-term Purchase Commitment [Line Items]
Long-term purchase commitment term (in years)	20 years
Maximum | Natural gas supply contracts fixed payment
Long-term Purchase Commitment [Line Items]
Long-term purchase commitment term (in years)	4 years
Maximum | Natural gas supply purchase commitments
Long-term Purchase Commitment [Line Items]
Long-term purchase commitment term (in years)	9 years
Duke Energy Ohio | Natural Gas Supply and Capacity Contracts
Long-term Purchase Commitment [Line Items]
2023	$ 85
2024	101
2025	85
2026	56
2027	52
Thereafter	616
Total	995
Piedmont | Natural Gas Supply and Capacity Contracts
Long-term Purchase Commitment [Line Items]
2023	319
2024	313
2025	267
2026	213
2027	203
Thereafter	587
Total	$ 1,902

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease assets, cost basis	$ 163,839	$ 154,496
Piedmont
Lessee, Lease, Description [Line Items]
Operating lease assets, cost basis	10,869	9,918
Construction and transportation of natural gas pipelines | Piedmont
Lessee, Lease, Description [Line Items]
Net investment in lease, current	2	2
Duke Energy Carolinas | Construction and transportation of natural gas pipelines | Piedmont
Lessee, Lease, Description [Line Items]
Net investment in lease, noncurrent	$ 201	$ 203

Leases (Lease Costs) (Details)

Leases (Lease Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 229	$ 245
Short-term lease expense	4	5
Variable lease expense	61	41
Finance lease expense
Amortization of leased assets	151	219
Interest on lease liabilities	50	55
Total finance lease expense	201	274
Total lease expense	495	565
Duke Energy Carolinas
Lessee, Lease, Description [Line Items]
Operating lease expense	39	43
Variable lease expense	(1)	17
Finance lease expense
Amortization of leased assets	6	5
Interest on lease liabilities	32	33
Total finance lease expense	38	38
Total lease expense	76	98
Progress Energy
Lessee, Lease, Description [Line Items]
Operating lease expense	153	155
Short-term lease expense	1	2
Variable lease expense	60	22
Finance lease expense
Amortization of leased assets	61	37
Interest on lease liabilities	49	48
Total finance lease expense	110	85
Total lease expense	324	264
Duke Energy Progress
Lessee, Lease, Description [Line Items]
Operating lease expense	83	83
Short-term lease expense		1
Variable lease expense	37	10
Finance lease expense
Amortization of leased assets	41	18
Interest on lease liabilities	45	42
Total finance lease expense	86	60
Total lease expense	206	154
Duke Energy Florida
Lessee, Lease, Description [Line Items]
Operating lease expense	70	72
Short-term lease expense	1	1
Variable lease expense	23	12
Finance lease expense
Amortization of leased assets	20	19
Interest on lease liabilities	4	6
Total finance lease expense	24	25
Total lease expense	118	110
Duke Energy Ohio
Lessee, Lease, Description [Line Items]
Operating lease expense	10	11
Finance lease expense
Total lease expense	10	11
Duke Energy Indiana
Lessee, Lease, Description [Line Items]
Operating lease expense	19	18
Short-term lease expense	2	2
Finance lease expense
Amortization of leased assets		1
Interest on lease liabilities	1
Total finance lease expense	1	1
Total lease expense	22	21
Piedmont
Lessee, Lease, Description [Line Items]
Operating lease expense	6	7
Variable lease expense	1	1
Finance lease expense
Total lease expense	$ 7	$ 8

Leases (Operating Lease Maturit

Leases (Operating Lease Maturities) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Lessee, Operating Lease, Liability, Payment, Due
2023	$ 225
2024	207
2025	175
2026	161
2027	134
Thereafter	322
Total operating lease payments	1,224
Less: present value discount	(169)
Total operating lease liabilities	1,055
Duke Energy Carolinas
Lessee, Operating Lease, Liability, Payment, Due
2023	23
2024	21
2025	14
2026	13
2027	9
Thereafter	37
Total operating lease payments	117
Less: present value discount	(20)
Total operating lease liabilities	97
Progress Energy
Lessee, Operating Lease, Liability, Payment, Due
2023	118
2024	110
2025	96
2026	99
2027	73
Thereafter	253
Total operating lease payments	749
Less: present value discount	(107)
Total operating lease liabilities	642
Duke Energy Progress
Lessee, Operating Lease, Liability, Payment, Due
2023	64
2024	56
2025	42
2026	45
2027	46
Thereafter	209
Total operating lease payments	462
Less: present value discount	(76)
Total operating lease liabilities	386
Duke Energy Florida
Lessee, Operating Lease, Liability, Payment, Due
2023	54
2024	54
2025	54
2026	54
2027	27
Thereafter	44
Total operating lease payments	287
Less: present value discount	(31)
Total operating lease liabilities	256
Duke Energy Ohio
Lessee, Operating Lease, Liability, Payment, Due
2023	2
2024	2
2025	2
2026	2
2027	2
Thereafter	15
Total operating lease payments	25
Less: present value discount	(7)
Total operating lease liabilities	18
Duke Energy Indiana
Lessee, Operating Lease, Liability, Payment, Due
2023	6
2024	5
2025	5
2026	4
2027	4
Thereafter	45
Total operating lease payments	69
Less: present value discount	(18)
Total operating lease liabilities	51
Piedmont
Lessee, Operating Lease, Liability, Payment, Due
2023	4
2024	4
2025	4
Thereafter	1
Total operating lease payments	13
Total operating lease liabilities	$ 13

Leases (Finance Lease Maturitie

Leases (Finance Lease Maturities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finance Lease, Liability, Payment, Due
2023	$ 198
2024	143
2025	76
2026	77
2027	74
Thereafter	584
Total finance lease payments	1,152
Less: amounts representing interest	(388)
Total finance lease liabilities	764	$ 915
Duke Energy Carolinas
Finance Lease, Liability, Payment, Due
2023	38
2024	38
2025	38
2026	38
2027	38
Thereafter	427
Total finance lease payments	617
Less: amounts representing interest	(333)
Total finance lease liabilities	284	289
Progress Energy
Finance Lease, Liability, Payment, Due
2023	103
2024	88
2025	85
2026	86
2027	82
Thereafter	555
Total finance lease payments	999
Less: amounts representing interest	(371)
Total finance lease liabilities	628	690
Duke Energy Progress
Finance Lease, Liability, Payment, Due
2023	78
2024	79
2025	80
2026	81
2027	81
Thereafter	555
Total finance lease payments	954
Less: amounts representing interest	(367)
Total finance lease liabilities	587	629
Duke Energy Florida
Finance Lease, Liability, Payment, Due
2023	25
2024	9
2025	5
2026	5
2027	1
Total finance lease payments	45
Less: amounts representing interest	(4)
Total finance lease liabilities	41	61
Duke Energy Indiana
Finance Lease, Liability, Payment, Due
2023	1
2024	1
2025	1
2026	1
2027	1
Thereafter	23
Total finance lease payments	28
Less: amounts representing interest	(19)
Total finance lease liabilities	$ 9	$ 10

Leases (Supplemental Financial

Leases (Supplemental Financial Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Assets
Operating lease right-of-use assets, net	$ 1,042	$ 1,136
Net property, plant and equipment	810	950
Total lease assets	1,852	2,086
Current
Operating	179	184
Finance	153	151
Noncurrent
Operating	876	940
Finance	611	764
Total lease liabilities	1,819	2,039
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	230	245
Operating cash flows from finance leases	50	55
Financing cash flows from finance leases	151	219
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	$ 111	182
Finance		$ 322
Weighted average remaining lease term (years)
Operating leases	8 years	8 years
Finance leases	10 years	10 years
Weighted-average discount rate
Operating leases	3.40%	3.50%
Finance leases	7.70%	7.30%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Public utilities, property, plant and equipment, net	Public utilities, property, plant and equipment, net
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current Liabilities: Other	Current Liabilities: Other
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt	Current maturities of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Debt	Long-Term Debt
Duke Energy Carolinas
Assets
Operating lease right-of-use assets, net	$ 78	$ 92
Net property, plant and equipment	284	302
Total lease assets	362	394
Current
Operating	14	22
Finance	7	6
Noncurrent
Operating	83	78
Finance	277	283
Total lease liabilities	381	389
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	24	25
Operating cash flows from finance leases	32	33
Financing cash flows from finance leases	6	5
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	$ 10	$ 4
Weighted average remaining lease term (years)
Operating leases	10 years	9 years
Finance leases	17 years	18 years
Weighted-average discount rate
Operating leases	3.80%	3.50%
Finance leases	11.50%	11.60%
Progress Energy
Assets
Operating lease right-of-use assets, net	$ 628	$ 691
Net property, plant and equipment	674	729
Total lease assets	1,302	1,420
Current
Operating	96	94
Finance	57	61
Noncurrent
Operating	546	606
Finance	571	629
Total lease liabilities	1,270	1,390
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	118	117
Operating cash flows from finance leases	49	48
Financing cash flows from finance leases	$ 61	37
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating		99
Finance		$ 322
Weighted average remaining lease term (years)
Operating leases	8 years	8 years
Finance leases	12 years	13 years
Weighted-average discount rate
Operating leases	3.60%	3.60%
Finance leases	9.10%	9%
Duke Energy Progress
Assets
Operating lease right-of-use assets, net	$ 370	$ 389
Net property, plant and equipment	590	627
Total lease assets	960	1,016
Current
Operating	51	50
Finance	35	41
Noncurrent
Operating	335	350
Finance	552	588
Total lease liabilities	973	1,029
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	63	62
Operating cash flows from finance leases	45	42
Financing cash flows from finance leases	$ 41	18
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating		99
Finance		$ 322
Weighted average remaining lease term (years)
Operating leases	9 years	10 years
Finance leases	12 years	13 years
Weighted-average discount rate
Operating leases	3.50%	3.40%
Finance leases	9.10%	9%
Duke Energy Florida
Assets
Operating lease right-of-use assets, net	$ 258	$ 302
Net property, plant and equipment	84	102
Total lease assets	342	404
Current
Operating	45	44
Finance	22	20
Noncurrent
Operating	211	256
Finance	19	41
Total lease liabilities	297	361
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	55	55
Operating cash flows from finance leases	4	6
Financing cash flows from finance leases	$ 20	$ 19
Weighted average remaining lease term (years)
Operating leases	6 years	7 years
Finance leases	12 years	11 years
Weighted-average discount rate
Operating leases	3.80%	3.80%
Finance leases	8%	8.20%
Duke Energy Ohio
Assets
Operating lease right-of-use assets, net	$ 18	$ 19
Total lease assets	18	19
Current
Operating	1	1
Noncurrent
Operating	17	18
Total lease liabilities	18	19
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 2	$ 2
Weighted average remaining lease term (years)
Operating leases	15 years	16 years
Weighted-average discount rate
Operating leases	4.20%	4.20%
Duke Energy Indiana
Assets
Operating lease right-of-use assets, net	$ 49	$ 53
Net property, plant and equipment	6	7
Total lease assets	55	60
Current
Operating	4	4
Noncurrent
Operating	47	50
Finance	9	10
Total lease liabilities	60	64
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	6	6
Operating cash flows from finance leases	$ 1
Financing cash flows from finance leases		$ 1
Weighted average remaining lease term (years)
Operating leases	15 years	16 years
Finance leases	23 years	24 years
Weighted-average discount rate
Operating leases	4%	4.10%
Finance leases	11.90%	11.90%
Piedmont
Assets
Operating lease right-of-use assets, net	$ 4	$ 16
Total lease assets	4	16
Current
Operating		5
Noncurrent
Operating	13	14
Total lease liabilities	13	19
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 4	$ 5
Weighted average remaining lease term (years)
Operating leases	1 year	4 years
Weighted-average discount rate
Operating leases	3.30%	3.60%

Debt and Credit Facilities (Sum

Debt and Credit Facilities (Summary of Debt and Related Terms) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	4.09%	3.50%
Unsecured Debt	$ 29,585	$ 24,564
Secured Debt	5,632	5,584
First mortgage bonds	32,645	31,026
Finance leases	764	915
Tax exempt bonds	1,331	360
Notes payable and commercial paper	4,582	3,929
Fair value hedge carrying value adjustment	(5)	4
Unamortized debt discount and premium, net	1,016	1,119
Unamortized debt issuance costs	(383)	(362)
Total debt	75,167	67,139
Short-term notes payable and commercial paper	(3,952)	(3,304)
Current maturities of long-term debt	(4,154)	(3,387)
Total long-term debt	67,061	60,448
Short term obligations classified as long-term debt	$ 937	$ 937
Unsecured Debt
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	4.20%	3.71%
Secured Debt
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	4.11%	2.50%
First Mortgage Bonds
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	3.89%	3.87%
Finance Leases
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	7.90%	5.81%
Tax Exempt Bonds
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	3.84%	0.65%
Short term obligations classified as long-term debt	$ 312	$ 312
Notes Payable And Commercial Paper
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	4.50%	0.35%
Short term obligations classified as long-term debt	$ 625	$ 625
Weighted average days to maturity (in days)	15 days	15 days
Parent Company | Purchase Accounting Adjustments
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 27	$ 29
Duke Energy Carolinas
Debt Instrument [Line Items]
Unsecured Debt	1,150	1,150
Secured Debt	1,317	1,094
First mortgage bonds	11,306	10,507
Finance leases	284	289
Money pool/intercompany borrowings	1,533	526
Fair value hedge carrying value adjustment		4
Unamortized debt discount and premium, net	(21)	(21)
Unamortized debt issuance costs	(70)	(67)
Total debt	15,499	13,482
Short-term money pool/intercompany borrowings	(1,233)	(226)
Current maturities of long-term debt	(1,018)	(362)
Total long-term debt	13,248	12,894
Short term obligations classified as long-term debt	300	300
Duke Energy Carolinas | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt		0
Progress Energy
Debt Instrument [Line Items]
Unsecured Debt	2,600	2,250
Secured Debt	2,383	2,397
First mortgage bonds	16,350	15,450
Finance leases	628	690
Tax exempt bonds	500	48
Money pool/intercompany borrowings	993	2,959
Unamortized debt discount and premium, net	(40)	(34)
Unamortized debt issuance costs	(132)	(128)
Total debt	23,282	23,632
Short-term money pool/intercompany borrowings	(843)	(2,809)
Current maturities of long-term debt	(697)	(1,082)
Total long-term debt	21,742	19,741
Duke Energy Progress
Debt Instrument [Line Items]
Secured Debt	1,155	1,120
First mortgage bonds	8,776	8,375
Finance leases	587	629
Tax exempt bonds	500	48
Money pool/intercompany borrowings	389	322
Unamortized debt discount and premium, net	(23)	(19)
Unamortized debt issuance costs	(59)	(54)
Total debt	11,325	10,421
Short-term money pool/intercompany borrowings	(238)	(172)
Current maturities of long-term debt	(369)	(556)
Total long-term debt	10,718	9,693
Short term obligations classified as long-term debt	150	150
Duke Energy Progress | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt		0
Duke Energy Florida
Debt Instrument [Line Items]
Unsecured Debt	950	150
Secured Debt	1,228	1,278
First mortgage bonds	7,576	7,075
Finance leases	41	61
Money pool/intercompany borrowings	605	199
Unamortized debt discount and premium, net	(16)	(14)
Unamortized debt issuance costs	(70)	(68)
Total debt	10,314	8,681
Short-term money pool/intercompany borrowings	(605)	(199)
Current maturities of long-term debt	(328)	(76)
Total long-term debt	9,381	8,406
Duke Energy Florida | Purchase Accounting Adjustments
Debt Instrument [Line Items]
Finance leases	164	256
Duke Energy Ohio
Debt Instrument [Line Items]
Unsecured Debt	1,330	1,330
First mortgage bonds	1,850	1,850
Tax exempt bonds	77	27
Money pool/intercompany borrowings	522	128
Unamortized debt discount and premium, net	(25)	(27)
Unamortized debt issuance costs	(12)	(13)
Total debt	3,742	3,295
Short-term money pool/intercompany borrowings	(497)	(103)
Current maturities of long-term debt	(475)
Total long-term debt	2,770	3,192
Short term obligations classified as long-term debt	52	52
Duke Energy Ohio | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	27	27
Duke Energy Indiana
Debt Instrument [Line Items]
Unsecured Debt	697	700
First mortgage bonds	3,138	3,219
Finance leases	9	10
Tax exempt bonds	352	285
Money pool/intercompany borrowings	585	150
Unamortized debt discount and premium, net	(17)	(18)
Unamortized debt issuance costs	(22)	(23)
Total debt	4,742	4,323
Short-term money pool/intercompany borrowings	(435)
Current maturities of long-term debt	(303)	(84)
Total long-term debt	4,004	4,239
Short term obligations classified as long-term debt	435	435
Duke Energy Indiana | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	285	285
Piedmont
Debt Instrument [Line Items]
Unsecured Debt	3,390	2,990
Money pool/intercompany borrowings	514	518
Unamortized debt discount and premium, net	(9)	(6)
Unamortized debt issuance costs	(18)	(16)
Total debt	3,877	3,486
Short-term money pool/intercompany borrowings	(514)	(518)
Current maturities of long-term debt	(45)	0
Total long-term debt	3,318	2,968
Progress Energy | Purchase Accounting Adjustments
Debt Instrument [Line Items]
Unamortized debt discount and premium, net	1,057	1,121
Piedmont | Purchase Accounting Adjustments
Debt Instrument [Line Items]
Unamortized debt discount and premium, net	$ 85	$ 100

Debt and Credit Facilities (S_2

Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 4,154	$ 3,387
Other
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 854
Duke Energy (Parent) | Debt Maturing April 2023, 2.875% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	2.875%
Current maturities of long-term debt	$ 350
Duke Energy (Parent) | Debt Maturing June 2023, 1.938% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.469%
Current maturities of long-term debt	$ 500
Duke Energy (Parent) | Debt Maturing October 2023, 3.950% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.95%
Current maturities of long-term debt	$ 400
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 475
Duke Energy Ohio | Debt Maturing October 2023, 2.750% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.272%
Current maturities of long-term debt	$ 150
Duke Energy Ohio | Debt Maturing September 2023, 3.800% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.80%
Current maturities of long-term debt	$ 300
Duke Energy Indiana
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 303	84
Duke Energy Indiana | Debt Maturing October 2023, -% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.118%
Current maturities of long-term debt	$ 300
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 1,018	362
Duke Energy Carolinas | Debt Maturing March 2023, 2.500% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	2.50%
Current maturities of long-term debt	$ 500
Duke Energy Carolinas | Debt Maturing March 2023, 3.050% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.05%
Current maturities of long-term debt	$ 500
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 369	$ 556
Duke Energy Progress | Debt Maturing September 2023, 3.375% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.375%
Current maturities of long-term debt	$ 300

Debt and Credit Facilities (Ann

Debt and Credit Facilities (Annual Maturities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	$ 4,154
2024	3,216
2025	4,322
2026	2,682
2027	3,203
Thereafter	52,999
Total long-term debt, including current maturities	70,576
Current maturities of long-term debt	4,154	$ 3,387
Unamortized debt discount and premium, net	(1,170)	(1,250)
Purchase Accounting Adjustments
Long-term Debt, Fiscal Year Maturity [Abstract]
Unamortized debt discount and premium, net	1,169
Duke Energy Carolinas
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	1,018
2024	19
2025	491
2026	621
2027	323
Thereafter	11,884
Total long-term debt, including current maturities	14,356
Current maturities of long-term debt	1,018	362
Progress Energy
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	697
2024	939
2025	1,040
2026	345
2027	947
Thereafter	18,642
Total long-term debt, including current maturities	22,610
Current maturities of long-term debt	697	1,082
Duke Energy Progress
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	369
2024	72
2025	975
2026	279
2027	233
Thereafter	9,238
Total long-term debt, including current maturities	11,166
Current maturities of long-term debt	369	556
Duke Energy Florida
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	328
2024	867
2025	65
2026	66
2027	714
Thereafter	7,753
Total long-term debt, including current maturities	9,793
Current maturities of long-term debt	328	76
Duke Energy Ohio
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	475
2025	245
2026	45
2027	102
Thereafter	2,415
Total long-term debt, including current maturities	3,282
Current maturities of long-term debt	475
Duke Energy Indiana
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	303
2024	4
2025	4
2026	4
2027	177
Thereafter	3,853
Total long-term debt, including current maturities	4,345
Current maturities of long-term debt	303	84
Piedmont
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	45
2024	40
2025	205
2026	40
2027	300
Thereafter	2,760
Total long-term debt, including current maturities	3,390
Current maturities of long-term debt	$ 45	$ 0
Duke Energy (Parent) | Debt Maturing April 2023, 2.875% Coupon | Unsecured Debt
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest Rate	2.875%
Current maturities of long-term debt	$ 350
Duke Energy (Parent) | Debt Maturing June 2023, 1.938% Coupon | Unsecured Debt
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest Rate	3.469%
Current maturities of long-term debt	$ 500

Debt and Credit Facilities (Sho

Debt and Credit Facilities (Short Term Obligations Classified As Long Term) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	$ 937	$ 937
Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	312	312
Commercial Paper
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	625	625
Duke Energy Carolinas
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	300	300
Duke Energy Carolinas | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt		0
Duke Energy Carolinas | Commercial Paper
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	300	300
Duke Energy Progress
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	150	150
Duke Energy Progress | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt		0
Duke Energy Progress | Commercial Paper
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	150	150
Duke Energy Ohio
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	52	52
Duke Energy Ohio | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	27	27
Duke Energy Ohio | Commercial Paper
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	25	25
Duke Energy Indiana
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	435	435
Duke Energy Indiana | Tax Exempt Bonds
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	285	285
Duke Energy Indiana | Commercial Paper
Debt Instrument [Line Items]
Short term obligations classified as long-term debt	$ 150	$ 150

Debt and Credit Facilities (S_3

Debt and Credit Facilities (Summary of Debt Issuances) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt issuances	$ 9,186,000,000	$ 8,107,000,000
Repayments of long-term debt	$ 4,396,000,000	$ 5,294,000,000	$ 4,506,000,000
May 2022 Notes Due May 2052 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.05%
Debt issuances	$ 400,000,000
June 2022 Notes Due June 2028 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.75%
Debt issuances	$ 645,000,000
June 2022 Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.306%
Debt issuances	$ 537,000,000
August 2022 Notes Due March 2028 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.30%
Debt issuances	$ 900,000,000
August 2022 Notes Due August 2032 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.50%
Debt issuances	$ 1,150,000,000
August 2022 Notes Due August 2052 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5%
Debt issuances	$ 1,150,000,000
December 2022 Notes Due December 2025 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5%
Debt issuances	$ 500,000,000
December 2022 Notes Due December 2027 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5%
Debt issuances	$ 500,000,000
March 2022 Notes Due 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	2.85%
Debt issuances	$ 500,000,000
March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.55%
Debt issuances	$ 650,000,000
March 2022 Notes Due April 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.40%
Debt issuances	$ 500,000,000
March 2022 Notes Due April 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	4%
Debt issuances	$ 400,000,000
November 2022 Notes Due November 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.95%
Debt issuances	$ 500,000,000
June 2022 Notes Due September 2030 | Tax Exempt Bonds
Debt Instrument [Line Items]
Interest Rate	4%
Debt issuances	$ 168,000,000
June 2022 Notes Due November 2039 | Tax Exempt Bonds
Debt Instrument [Line Items]
Interest Rate	4.25%
Debt issuances	$ 234,000,000
September 2022 Notes Due September 2036 | Tax Exempt Bonds
Debt Instrument [Line Items]
Interest Rate	3.30%
Debt issuances	$ 200,000,000
September 2022 Notes Due September 2030 (1) | Tax Exempt Bonds
Debt Instrument [Line Items]
Interest Rate	3.70%
Debt issuances	$ 210,000,000
September 2022 Notes Due September 2030 (2) | Tax Exempt Bonds
Debt Instrument [Line Items]
Interest Rate	4%
Debt issuances	$ 42,000,000
June 2022 Notes Due June 2028 And 2034 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.10%
Debt issuances	$ 600,000,000
Repayments of long-term debt	500,000,000
March 2021 Notes Due March 2031 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		2.50%
Debt issuances		$ 350,000,000
June 2021 Notes Due June 2023 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		0.299%
Debt issuances		$ 500,000,000
June 2021 Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		2.55%
Debt issuances		$ 1,000,000,000
June 2021 Notes Due June 2041 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		3.30%
Debt issuances		$ 750,000,000
June 2021 Notes Due June 2051 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		3.50%
Debt issuances		$ 750,000,000
September 2021 Notes Due January 2082 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		3.25%
Debt issuances		$ 500,000,000
Repayments of long-term debt		$ 500,000,000
Interest rate reset period (in years)		5 years
November 2021 Notes Due July 2031 | Secured Debt
Debt Instrument [Line Items]
Interest Rate		1.679%
Debt issuances		$ 100,000,000
November 2021 Notes Due July 2041 | Secured Debt
Debt Instrument [Line Items]
Interest Rate		2.617%
Debt issuances		$ 137,000,000
November 2021 Notes Due July 2028 | Secured Debt
Debt Instrument [Line Items]
Interest Rate		1.295%
Debt issuances		$ 221,000,000
November 2021 Notes Due July 2037 | Secured Debt
Debt Instrument [Line Items]
Interest Rate		2.387%
Debt issuances		$ 352,000,000
November 2021 Notes Due July 2041 (2) | Secured Debt
Debt Instrument [Line Items]
Interest Rate		2.799%
Debt issuances		$ 197,000,000
April 2021 Notes Due April 2031 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		2.55%
Debt issuances		$ 550,000,000
April 2021 Notes Due April 2051 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		3.45%
Debt issuances		$ 450,000,000
August 2021 Notes Due August 2031 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		2%
Debt issuances		$ 650,000,000
August 2021 Notes Due August 2051 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		2.90%
Debt issuances		$ 450,000,000
December 2021 Notes Due December 2031 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		2.40%
Debt issuances		$ 650,000,000
December 2021 Notes Due December 2051 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		3%
Debt issuances		$ 500,000,000
Parent Company
Debt Instrument [Line Items]
Debt issuances	5,784,000,000	3,500,000,000
Duke Energy (Parent)
Debt Instrument [Line Items]
Repayments of long-term debt		1,750,000,000
Duke Energy (Parent) | June 2022 Notes Due June 2028 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	645,000,000
Duke Energy (Parent) | June 2022 Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	537,000,000
Duke Energy (Parent) | August 2022 Notes Due March 2028 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy (Parent) | August 2022 Notes Due August 2032 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Duke Energy (Parent) | August 2022 Notes Due August 2052 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Duke Energy (Parent) | December 2022 Notes Due December 2025 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy (Parent) | December 2022 Notes Due December 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy (Parent) | June 2022 Notes Due September 2030 | Tax Exempt Bonds
Debt Instrument [Line Items]
Debt issuances	168,000,000
Duke Energy (Parent) | June 2022 Notes Due November 2039 | Tax Exempt Bonds
Debt Instrument [Line Items]
Debt issuances	234,000,000
Duke Energy (Parent) | June 2021 Notes Due June 2023 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		500,000,000
Duke Energy (Parent) | June 2021 Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		1,000,000,000
Duke Energy (Parent) | June 2021 Notes Due June 2041 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		750,000,000
Duke Energy (Parent) | June 2021 Notes Due June 2051 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		750,000,000
Duke Energy (Parent) | September 2021 Notes Due January 2082 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		500,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances	1,150,000,000	1,237,000,000
Repayments of long-term debt	436,000,000	617,000,000	813,000,000
Duke Energy Carolinas | March 2022 Notes Due 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Carolinas | March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	650,000,000
Duke Energy Carolinas | November 2021 Notes Due July 2031 | Secured Debt
Debt Instrument [Line Items]
Debt issuances		100,000,000
Duke Energy Carolinas | November 2021 Notes Due July 2041 | Secured Debt
Debt Instrument [Line Items]
Debt issuances		137,000,000
Duke Energy Carolinas | April 2021 Notes Due April 2031 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		550,000,000
Duke Energy Carolinas | April 2021 Notes Due April 2051 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		450,000,000
Duke Energy Carolinas | Bonds Maturing June 2021, 3.900% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Repayments of long-term debt		500,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances	1,352,000,000	1,870,000,000
Repayments of long-term debt	645,000,000	1,308,000,000	1,085,000,000
Duke Energy Progress | First Mortgage Bonds
Debt Instrument [Line Items]
Repayments of long-term debt		600,000,000
Duke Energy Progress | March 2022 Notes Due April 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress | March 2022 Notes Due April 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	400,000,000
Duke Energy Progress | September 2022 Notes Due September 2036 | Tax Exempt Bonds
Debt Instrument [Line Items]
Debt issuances	200,000,000
Duke Energy Progress | September 2022 Notes Due September 2030 (1) | Tax Exempt Bonds
Debt Instrument [Line Items]
Debt issuances	210,000,000
Duke Energy Progress | September 2022 Notes Due September 2030 (2) | Tax Exempt Bonds
Debt Instrument [Line Items]
Debt issuances	42,000,000
Duke Energy Progress | November 2021 Notes Due July 2028 | Secured Debt
Debt Instrument [Line Items]
Debt issuances		221,000,000
Duke Energy Progress | November 2021 Notes Due July 2037 | Secured Debt
Debt Instrument [Line Items]
Debt issuances		352,000,000
Duke Energy Progress | November 2021 Notes Due July 2041 (2) | Secured Debt
Debt Instrument [Line Items]
Debt issuances		197,000,000
Duke Energy Progress | August 2021 Notes Due August 2031 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		650,000,000
Duke Energy Progress | August 2021 Notes Due August 2051 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		450,000,000
Duke Energy Florida
Debt Instrument [Line Items]
Debt issuances	500,000,000	1,150,000,000
Repayments of long-term debt	77,000,000	575,000,000	572,000,000
Duke Energy Florida | November 2022 Notes Due November 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Florida | December 2021 Notes Due December 2031 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		650,000,000
Duke Energy Florida | December 2021 Notes Due December 2051 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		500,000,000
Piedmont
Debt Instrument [Line Items]
Debt issuances	400,000,000	350,000,000
Repayments of long-term debt		160,000,000
Piedmont | Unsecured Debt
Debt Instrument [Line Items]
Repayments of long-term debt		160,000,000
Piedmont | May 2022 Notes Due May 2052 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	400,000,000
Piedmont | March 2021 Notes Due March 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		350,000,000
Duke Energy Ohio
Debt Instrument [Line Items]
Repayments of long-term debt		50,000,000
Duke Energy Indiana
Debt Instrument [Line Items]
Repayments of long-term debt	$ 84,000,000	$ 70,000,000	$ 513,000,000

Debt and Credit Facilities (Nar

Debt and Credit Facilities (Narrative) (Details)		1 Months Ended			12 Months Ended
	Mar. 09, 2022 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)	Oct. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Mar. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt issuances			$ 9,186,000,000		$ 9,186,000,000					$ 8,107,000,000
Demand notes, maximum amount available for sale			4,000,000,000		4,000,000,000
Demand notes, maximum amount outstanding			2,000,000,000		2,000,000,000
Principal amount of demand notes			897,000,000		897,000,000					1,066,000,000
Current maturities of long-term debt			4,154,000,000		4,154,000,000					3,387,000,000
Other loans outstanding against cash surrender value of life insurance policies			852,000,000		852,000,000					819,000,000
Other Loans
Debt Instrument [Line Items]
Current maturities of long-term debt			131,000,000		131,000,000
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt			475,000,000		475,000,000
Duke Energy Indiana
Debt Instrument [Line Items]
Current maturities of long-term debt			303,000,000		303,000,000					84,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances			1,352,000,000		1,352,000,000					1,870,000,000
Current maturities of long-term debt			369,000,000		369,000,000					556,000,000
Other loans outstanding against cash surrender value of life insurance policies			33,000,000		33,000,000					34,000,000
Progress Energy
Debt Instrument [Line Items]
Current maturities of long-term debt			697,000,000		697,000,000					1,082,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances			1,150,000,000		1,150,000,000					1,237,000,000
Current maturities of long-term debt			1,018,000,000		1,018,000,000					362,000,000
Duke Energy Florida
Debt Instrument [Line Items]
Debt issuances			500,000,000		500,000,000					1,150,000,000
Current maturities of long-term debt			328,000,000		328,000,000					76,000,000
Piedmont
Debt Instrument [Line Items]
Debt issuances			400,000,000		400,000,000					350,000,000
Current maturities of long-term debt			$ 45,000,000		$ 45,000,000					$ 0
Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Duke Energy Ohio
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Duke Energy Indiana
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Duke Energy Progress
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Progress Energy
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Duke Energy Carolinas
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Duke Energy Florida
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.65		0.65	0.65
Maximum | Piedmont
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower			0.70		0.70	0.70
First Mortgage Bonds | Duke Energy Carolinas | Subsequent Event | January 2023 Notes
Debt Instrument [Line Items]
Debt issuances		$ 1,800,000,000
Proceeds from issuance of debt		1,000,000,000
First Mortgage Bonds | Duke Energy Carolinas | Subsequent Event | January 2023 Notes At 4.95%
Debt Instrument [Line Items]
Debt issuances		$ 900,000,000
Term (in years)		10 years
Interest Rate		4.95%
First Mortgage Bonds | Duke Energy Carolinas | Subsequent Event | January 2023 Notes At 5.35%
Debt Instrument [Line Items]
Debt issuances		$ 900,000,000
Term (in years)		30 years
Interest Rate		5.35%
Unsecured Debt | June 2022 Notes Due 2034
Debt Instrument [Line Items]
Debt issuances | €						€ 500,000,000
Interest Rate			3.85%		3.85%	3.85%
Revolving Credit Facility
Debt Instrument [Line Items]
Facility size			$ 9,000,000,000		$ 9,000,000,000			$ 9,000,000,000	$ 8,000,000,000
Revolving Credit Facility | Duke Energy Ohio
Debt Instrument [Line Items]
Facility size			900,000,000		900,000,000
Revolving Credit Facility | Duke Energy Indiana
Debt Instrument [Line Items]
Facility size			1,050,000,000		1,050,000,000
Revolving Credit Facility | Duke Energy Progress
Debt Instrument [Line Items]
Facility size			800,000,000		800,000,000
Revolving Credit Facility | Duke Energy Carolinas
Debt Instrument [Line Items]
Facility size			1,925,000,000		1,925,000,000
Revolving Credit Facility | Duke Energy Florida
Debt Instrument [Line Items]
Facility size			1,150,000,000		1,150,000,000
Revolving Credit Facility | Piedmont
Debt Instrument [Line Items]
Facility size			800,000,000		$ 800,000,000
Revolving Credit Facility | Line of Credit | Progress Energy
Debt Instrument [Line Items]
Facility size								$ 2,500,000,000
Revolving Credit Facility | Line of Credit | Duke Energy Florida
Debt Instrument [Line Items]
Facility size							$ 800,000,000
Revolving Credit Facility | Line of Credit | Duke Energy (Parent)
Debt Instrument [Line Items]
Facility size	$ 1,400,000,000
Extension period (in years)	2 years
Repayments of debt			$ 400,000,000
June 2017 Three Year Revolving Credit Facility
Debt Instrument [Line Items]
Term (in years)				3 years	3 years

Debt and Credit Facilities (Sch

Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - USD ($)	Dec. 31, 2022	Mar. 31, 2022	Mar. 01, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Tax-exempt bonds	$ (1,331,000,000)			$ (360,000,000)
Duke Energy Progress
Line of Credit Facility [Line Items]
Tax-exempt bonds	(500,000,000)			(48,000,000)
Duke Energy Ohio
Line of Credit Facility [Line Items]
Tax-exempt bonds	(77,000,000)			(27,000,000)
Duke Energy Indiana
Line of Credit Facility [Line Items]
Tax-exempt bonds	(352,000,000)			$ (285,000,000)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Facility size	9,000,000,000	$ 9,000,000,000	$ 8,000,000,000
Commercial paper	(3,685,000,000)
Outstanding letters of credit	(40,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity	5,194,000,000
Revolving Credit Facility | Parent Company
Line of Credit Facility [Line Items]
Facility size	2,375,000,000
Commercial paper	463,000,000
Outstanding letters of credit	(27,000,000)
Available capacity	2,811,000,000
Revolving Credit Facility | Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,925,000,000
Commercial paper	(1,533,000,000)
Outstanding letters of credit	(4,000,000)
Available capacity	388,000,000
Revolving Credit Facility | Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(389,000,000)
Outstanding letters of credit	(2,000,000)
Available capacity	409,000,000
Revolving Credit Facility | Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	1,150,000,000
Commercial paper	(605,000,000)
Outstanding letters of credit	(7,000,000)
Available capacity	538,000,000
Revolving Credit Facility | Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	900,000,000
Commercial paper	(522,000,000)
Available capacity	378,000,000
Revolving Credit Facility | Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	1,050,000,000
Commercial paper	(585,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity	384,000,000
Revolving Credit Facility | Piedmont
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(514,000,000)
Available capacity	286,000,000
Proceeds Loaned To Subsidiary Registrants | Revolving Credit Facility | Parent Company
Line of Credit Facility [Line Items]
Commercial paper	$ (625,000,000)

Guarantees and Indemnificatio_2

Guarantees and Indemnifications (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Feb. 28, 2021	Jul. 31, 2020	Jan. 01, 2020	Oct. 31, 2017
Guarantor Obligations [Line Items]
Unused letters of credit		$ 35
Noncurrent Liabilities
Guarantor Obligations [Line Items]
Face value of guarantees	$ 3	2
Letters of credit
Guarantor Obligations [Line Items]
Maximum potential amount of future payments associated with guarantees		667
ACP
Guarantor Obligations [Line Items]
Maximum borrowing capacity				$ 1,900		$ 3,400
ACP | Atlantic Coast Pipeline (ACP)
Guarantor Obligations [Line Items]
Off-balance sheet, credit loss, liability					$ 95
ACP | Current Liabilities | Atlantic Coast Pipeline (ACP)
Guarantor Obligations [Line Items]
Guarantor obligations settled			$ 855
Atlantic Coast Pipeline (ACP) | Current Liabilities | Atlantic Coast Pipeline (ACP)
Guarantor Obligations [Line Items]
Guarantor obligations settled			$ 855
Performance guarantee | Customers and other third parties
Guarantor Obligations [Line Items]
Maximum potential amount of future payments associated with guarantees		33
Performance guarantee | Spectra Capital
Guarantor Obligations [Line Items]
Maximum potential amount of future payments associated with guarantees		$ 40
Financial guarantee | ACP
Guarantor Obligations [Line Items]
Maximum potential amount of future payments associated with guarantees	$ 860
Maximum exposure percentage	47%

Joint Ownership of Generating_3

Joint Ownership of Generating and Transmission Facilities (Schedule Joint Ownership of Generating and Transmission Facilities) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Duke Energy Carolinas | Catawba (units 1 and 2)
Jointly Owned Utility Plant Interests [Line Items]
Ownership interest	19.25%
Property, plant, and equipment	$ 1,047
Accumulated depreciation	546
Construction work in progress	$ 32
Duke Energy Carolinas | W.S. Lee CC
Jointly Owned Utility Plant Interests [Line Items]
Ownership interest	87.27%
Property, plant, and equipment	$ 613
Accumulated depreciation	86
Construction work in progress	$ 48
Duke Energy Indiana | Gibson (unit 5)
Jointly Owned Utility Plant Interests [Line Items]
Ownership interest	50.05%
Property, plant, and equipment	$ 450
Accumulated depreciation	241
Construction work in progress	$ 2
Duke Energy Indiana | Vermillion
Jointly Owned Utility Plant Interests [Line Items]
Ownership interest	62.50%
Property, plant, and equipment	$ 182
Accumulated depreciation	113
Construction work in progress	1
Duke Energy Indiana | Transmission and local facilities
Jointly Owned Utility Plant Interests [Line Items]
Property, plant, and equipment	6,718
Accumulated depreciation	1,510
Construction work in progress	$ 157

Asset Retirement Obligations (R

Asset Retirement Obligations (Recorded on the Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 12,728	$ 12,600	$ 12,854
Less: Current portion	773	647
Total noncurrent asset retirement obligation	11,955	11,953
Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	7,261
Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	5,176
Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	291
Duke Energy Carolinas
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	5,382	5,301	5,350
Less: Current portion	261	249
Total noncurrent asset retirement obligation	5,121	5,052
Duke Energy Carolinas | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	3,009
Duke Energy Carolinas | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,309
Duke Energy Carolinas | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	64
Progress Energy
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	6,181	6,112	6,149
Less: Current portion	289	275
Total noncurrent asset retirement obligation	5,892	5,837
Progress Energy | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,217
Progress Energy | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,862
Progress Energy | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	102
Duke Energy Progress
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	5,823	5,675	5,635
Less: Current portion	288	274
Total noncurrent asset retirement obligation	5,535	5,401
Duke Energy Progress | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	3,948
Duke Energy Progress | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,833
Duke Energy Progress | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	42
Duke Energy Florida
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	358	437	514
Less: Current portion	1	1
Total noncurrent asset retirement obligation	357	436
Duke Energy Florida | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	270
Duke Energy Florida | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	29
Duke Energy Florida | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	59
Duke Energy Ohio
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	154	136	111
Less: Current portion	17	13
Total noncurrent asset retirement obligation	137	123
Duke Energy Ohio | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	95
Duke Energy Ohio | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	59
Duke Energy Indiana
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	951	987	1,176
Less: Current portion	207	110
Total noncurrent asset retirement obligation	744	877
Duke Energy Indiana | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	911
Duke Energy Indiana | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	40
Piedmont
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	26	22	$ 20
Total noncurrent asset retirement obligation	26	$ 22
Piedmont | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 26

Asset Retirement Obligations (N

Asset Retirement Obligations (NDTF Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
NDTF Information [Abstract]
Annual funding requirement	$ 10
Decommissioning costs	9,105
Legally restricted NDTF investments, fair value	7,466	$ 8,933
Duke Energy Carolinas
NDTF Information [Abstract]
Decommissioning costs	4,365
Legally restricted NDTF investments, fair value	4,208	5,068
Duke Energy Progress
NDTF Information [Abstract]
Annual funding requirement	10
Decommissioning costs	4,181
Legally restricted NDTF investments, fair value	3,258	$ 3,865
Duke Energy Florida
NDTF Information [Abstract]
Decommissioning costs	$ 559

Asset Retirement Obligations _2

Asset Retirement Obligations (Narrative) (Details)	12 Months Ended
	Dec. 31, 2022
Nuclear Regulatory Commission
Asset Retirement Obligation [Line Items]
Operating license extension (in years)	20 years

Asset Retirement Obligations _3

Asset Retirement Obligations (Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation [Line Items]
Beginning Balance	$ 12,600	$ 12,854
Accretion expense	501	504
Liabilities settled	(680)	(613)
Liabilities incurred in the current year	22	14
Revisions in estimates of cash flows	285	(159)
Ending Balance	12,728	12,600
Duke Energy Carolinas
Asset Retirement Obligation [Line Items]
Beginning Balance	5,301	5,350
Accretion expense	242	242
Liabilities settled	(234)	(210)
Liabilities incurred in the current year		8
Revisions in estimates of cash flows	73	(89)
Ending Balance	5,382	5,301
Progress Energy
Asset Retirement Obligation [Line Items]
Beginning Balance	6,112	6,149
Accretion expense	229	229
Liabilities settled	(334)	(324)
Liabilities incurred in the current year	18	6
Revisions in estimates of cash flows	156	52
Ending Balance	6,181	6,112
Duke Energy Progress
Asset Retirement Obligation [Line Items]
Beginning Balance	5,675	5,635
Accretion expense	215	212
Liabilities settled	(228)	(214)
Revisions in estimates of cash flows	161	42
Ending Balance	5,823	5,675
Duke Energy Florida
Asset Retirement Obligation [Line Items]
Beginning Balance	437	514
Accretion expense	14	17
Liabilities settled	(106)	(110)
Liabilities incurred in the current year	18	6
Revisions in estimates of cash flows	(5)	10
Ending Balance	358	437
Duke Energy Ohio
Asset Retirement Obligation [Line Items]
Beginning Balance	136	111
Accretion expense	6	4
Liabilities settled	(13)	(3)
Revisions in estimates of cash flows	25	24
Ending Balance	154	136
Duke Energy Indiana
Asset Retirement Obligation [Line Items]
Beginning Balance	987	1,176
Accretion expense	30	35
Liabilities settled	(98)	(77)
Liabilities incurred in the current year	5
Revisions in estimates of cash flows	27	(147)
Ending Balance	951	987
Piedmont
Asset Retirement Obligation [Line Items]
Beginning Balance	22	20
Accretion expense	1	1
Revisions in estimates of cash flows	3	1
Ending Balance	$ 26	$ 22

Property, Plant and Equipment_2

Property, Plant and Equipment (Schedule Of Property, Plant and Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	13 years	13 years
Land	$ 2,232	$ 2,145
Other buildings and improvements	6,090	5,276
Equipment	2,959	2,659
Construction in process	7,381	5,979
Total property, plant and equipment	163,839	154,496
Facilities to be retired, net	9	144
Total net property, plant and equipment	$ 111,748	$ 105,536
Other, estimated useful life, in years	15 years	14 years
Finance leases, gross	$ 816	$ 958
Accumulated amortization of finance leases	7	9
Capitalized Interest Costs [Abstract]
Capitalized interest	118	66	$ 96
Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	3,081	3,181
Accumulated depreciation and amortization	(1,683)	(1,799)
Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	$ (50,544)	$ (47,611)
Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	39 years	40 years
Plant - transmission and distribution	$ 126,016	$ 120,855
Regulated | Natural gas transmission and distribution
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	56 years	54 years
Plant - transmission and distribution	$ 13,174	$ 12,079
Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	40 years	37 years
Other buildings and improvements	$ 2,537	$ 1,921
Nonregulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(1,556)	(1,493)
Accumulated amortization of finance leases	$ 1	$ 1
Nonregulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	10 years	11 years
Other buildings and improvements	$ 369	$ 401
Duke Energy Carolinas
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	565	543
Other buildings and improvements	1,368	1,323
Equipment	710	614
Construction in process	2,671	2,078
Total property, plant and equipment	54,650	51,874
Facilities to be retired, net	0	102
Total net property, plant and equipment	35,981	34,122
Finance leases, gross	335	335
Accumulated amortization of finance leases	51	33
Capitalized Interest Costs [Abstract]
Capitalized interest	50	29	28
Duke Energy Carolinas | Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	1,723	1,856
Accumulated depreciation and amortization	(934)	(1,064)
Duke Energy Carolinas | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(18,669)	(17,854)
Duke Energy Carolinas | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	46,640	44,910
Duke Energy Carolinas | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	973	550
Progress Energy
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	993	957
Other buildings and improvements	1,943	1,563
Equipment	936	791
Construction in process	3,073	2,297
Total property, plant and equipment	64,822	60,894
Facilities to be retired, net		26
Total net property, plant and equipment	44,238	41,706
Finance leases, gross	674	729
Accumulated amortization of finance leases	233	178
Capitalized Interest Costs [Abstract]
Capitalized interest	26	20	17
Progress Energy | Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	1,358	1,325
Accumulated depreciation and amortization	(749)	(735)
Progress Energy | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(20,584)	(19,214)
Progress Energy | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	55,872	53,447
Progress Energy | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	647	514
Duke Energy Progress
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	496	482
Other buildings and improvements	1,460	1,115
Equipment	567	497
Construction in process	1,317	954
Total property, plant and equipment	38,875	37,018
Facilities to be retired, net		26
Total net property, plant and equipment	24,674	23,657
Finance leases, gross	590	627
Accumulated amortization of finance leases	81	45
Capitalized Interest Costs [Abstract]
Capitalized interest	19	14	12
Duke Energy Progress | Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	1,358	1,325
Accumulated depreciation and amortization	(749)	(735)
Duke Energy Progress | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(14,201)	(13,387)
Duke Energy Progress | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	33,336	32,417
Duke Energy Progress | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	341	228
Duke Energy Florida
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	497	475
Other buildings and improvements	476	437
Equipment	369	294
Construction in process	1,756	1,343
Total property, plant and equipment	25,940	23,865
Total net property, plant and equipment	19,563	18,046
Finance leases, gross	84	102
Accumulated amortization of finance leases	152	133
Capitalized Interest Costs [Abstract]
Capitalized interest	7	6	5
Duke Energy Florida | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(6,377)	(5,819)
Duke Energy Florida | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	22,536	21,030
Duke Energy Florida | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	306	286
Duke Energy Ohio
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	230	219
Other buildings and improvements	380	287
Equipment	441	403
Construction in process	375	515
Total property, plant and equipment	12,497	11,725
Facilities to be retired, net		6
Total net property, plant and equipment	9,247	8,625
Capitalized Interest Costs [Abstract]
Capitalized interest	14	20	26
Duke Energy Ohio | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(3,250)	(3,106)
Duke Energy Ohio | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	6,900	6,573
Duke Energy Ohio | Regulated | Natural gas transmission and distribution
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	3,773	3,347
Duke Energy Ohio | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	398	381
Duke Energy Indiana
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	124	122
Other buildings and improvements	320	253
Equipment	356	262
Construction in process	381	460
Total property, plant and equipment	18,121	17,343
Total net property, plant and equipment	12,100	11,760
Finance leases, gross	10	10
Accumulated amortization of finance leases	4	3
Capitalized Interest Costs [Abstract]
PISCC Amortization		(17)
Capitalized interest	3		10
Duke Energy Indiana | PISCC Amortization
Capitalized Interest Costs [Abstract]
PISCC Amortization		24
Duke Energy Indiana | Debt Component
Capitalized Interest Costs [Abstract]
Capitalized interest		7
Duke Energy Indiana | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(6,021)	(5,583)
Duke Energy Indiana | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	16,604	15,925
Duke Energy Indiana | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	336	321
Piedmont
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	295	279
Other buildings and improvements	387	368
Equipment	125	122
Construction in process	478	262
Total property, plant and equipment	10,869	9,918
Facilities to be retired, net	9	11
Total net property, plant and equipment	8,797	8,030
Capitalized Interest Costs [Abstract]
Capitalized interest	4	9	$ 8
Piedmont | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(2,081)	(1,899)
Piedmont | Regulated | Natural gas transmission and distribution
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	9,401	8,732
Piedmont | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	$ 183	$ 155

Property, Plant and Equipment_3

Property, Plant and Equipment (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Charges related to reduction in physical workspace	$ 192
Impairment of assets and other charges
Property, Plant and Equipment [Line Items]
Charges related to reduction in physical workspace	133
Operation, maintenance and other
Property, Plant and Equipment [Line Items]
Charges related to reduction in physical workspace	42
Depreciation and amortization
Property, Plant and Equipment [Line Items]
Charges related to reduction in physical workspace	$ 17

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 19,303,000,000	$ 19,303,000,000
Goodwill accumulated impairment loss	0	0
Impairment charges	0
Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	17,400,000,000	17,400,000,000
Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	1,900,000,000	1,900,000,000
Duke Energy Ohio
Goodwill [Line Items]
Goodwill	920,000,000	920,000,000
Goodwill accumulated impairment loss	216,000,000	216,000,000
Duke Energy Ohio | Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	596,000,000	596,000,000
Duke Energy Ohio | Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	324,000,000	324,000,000
Progress Energy
Goodwill [Line Items]
Goodwill	3,655,000,000	3,655,000,000
Progress Energy | Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill accumulated impairment loss	0
Piedmont
Goodwill [Line Items]
Goodwill	49,000,000	$ 49,000,000
Piedmont | Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill accumulated impairment loss	$ 0

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	$ 273	$ 264
Accumulated amortization	(8)	(28)
Total intangible assets, net	265	236
Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	8	8
Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	210	204
Natural gas, coal and power contracts
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount		24
Accumulated amortization		(24)
Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	55	28
Accumulated amortization	(8)	(4)
Duke Energy Carolinas
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	84	73
Total intangible assets, net	84	73
Duke Energy Carolinas | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	84	73
Progress Energy
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	133	136
Accumulated amortization	(1)
Total intangible assets, net	132	136
Progress Energy | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	5	5
Progress Energy | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	124	131
Progress Energy | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	4
Accumulated amortization	(1)
Duke Energy Progress
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	127	133
Total intangible assets, net	127	133
Duke Energy Progress | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2	2
Duke Energy Progress | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	124	131
Duke Energy Progress | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	1
Duke Energy Florida
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	6	3
Accumulated amortization	(1)
Total intangible assets, net	5	3
Duke Energy Florida | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	3	3
Duke Energy Florida | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	3
Accumulated amortization	(1)
Duke Energy Ohio
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2
Total intangible assets, net	2
Duke Energy Ohio | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2
Duke Energy Indiana
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2	26
Accumulated amortization		(24)
Total intangible assets, net	2	2
Duke Energy Indiana | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2	2
Duke Energy Indiana | Natural gas, coal and power contracts
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount		24
Accumulated amortization		$ (24)
Piedmont
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	22
Accumulated amortization	(2)
Total intangible assets, net	20
Piedmont | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	22
Accumulated amortization	$ (2)

Investments in Unconsolidated_3

Investments in Unconsolidated Affiliates (Investments in Equity Method Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments In Unconsolidated Affiliates [Line Items]
Investments	$ 455	$ 457
Equity in earnings (losses) of unconsolidated affiliates	113	62	$ (2,005)
Electric Utilities and Infrastructure
Investments In Unconsolidated Affiliates [Line Items]
Investments	99	104
Equity in earnings (losses) of unconsolidated affiliates	7	7	(1)
Gas Utilities and Infrastructure
Investments In Unconsolidated Affiliates [Line Items]
Investments	240	231
Equity in earnings (losses) of unconsolidated affiliates	21	8	(2,017)
Other
Investments In Unconsolidated Affiliates [Line Items]
Investments	116	122
Equity in earnings (losses) of unconsolidated affiliates	$ 85	$ 47	$ 13

Investments in Unconsolidated_4

Investments in Unconsolidated Affiliates (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments In Unconsolidated Affiliates [Line Items]
Distributions from equity investments	$ 111	$ 56	$ 34
Distributions from equity investments, return of capital	$ 6	14	23
Electric Utilities and Infrastructure | DATC
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	50%
Electric Utilities and Infrastructure | Pioneer
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	50%
Gas Utilities and Infrastructure | Sabal Trail
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	7.50%
Gas Utilities and Infrastructure | ACP
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	47%
Gas Utilities and Infrastructure | SustainRNG
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	29.68%
Gas Utilities and Infrastructure | Sustain T&W
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	70%
Gas Utilities and Infrastructure | Sustain Liberty
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	70%
Other | NMC
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	17.50%
Board representation and voting rights, ownership percentage	25%
Piedmont
Investments In Unconsolidated Affiliates [Line Items]
Distributions from equity investments	$ 31	8	2
Distributions from equity investments, return of capital		$ 2	$ 2
Piedmont | Gas Utilities and Infrastructure | Cardinal
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	21.49%
Piedmont | Gas Utilities and Infrastructure | Pine Needle
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	45%
Piedmont | Gas Utilities and Infrastructure | Hardy Storage
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	50%

Investments in Unconsolidated_5

Investments in Unconsolidated Affiliates (Significant Subsidiaries) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments In Unconsolidated Affiliates [Line Items]
Current assets	$ 13,222				$ 9,940				$ 13,222	$ 9,940
Noncurrent assets	53,116				54,111				53,116	54,111
Current liabilities	18,873				15,931				18,873	15,931
Noncurrent liabilities	40,299				42,072				40,299	42,072
Membership interests	2,531				1,840				2,531	1,840
Operating loss	1,194	$ 2,056	$ 1,448	$ 1,314	1,110	$ 1,726	$ 1,198	$ 1,466	6,012	5,500	$ 4,571
Net income (loss)	$ (658)	$ 1,413	$ 880	$ 820	$ 664	$ 1,276	$ 698	$ 941	2,455	3,579	1,082
Net loss attributable to Duke Energy									$ 2,550	$ 3,908	1,377
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Investments In Unconsolidated Affiliates [Line Items]
Operating loss											(4,612)
Net income (loss)											(4,512)
Net loss attributable to Duke Energy											$ (2,121)

Related Party Transactions (Oth

Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Duke Energy Carolinas | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 838	$ 894	$ 753
Duke Energy Carolinas | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	28	24	20
Duke Energy Carolinas | Joint Dispatch Agreement (JDA) revenue | Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	600	207	114
Related party transaction, other revenues from transactions with related party	109	41	25
Duke Energy Carolinas | Intercompany natural gas transactions | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	12	11	15
Progress Energy | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	818	856	715
Progress Energy | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	43	41	36
Progress Energy | Joint Dispatch Agreement (JDA) revenue | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	109	41	25
Related party transaction, other revenues from transactions with related party	600	207	114
Progress Energy | Intercompany natural gas transactions | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	76	75	75
Duke Energy Progress | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	469	504	420
Duke Energy Progress | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	20	19	17
Duke Energy Progress | Joint Dispatch Agreement (JDA) revenue | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	109	41	25
Related party transaction, other revenues from transactions with related party	600	207	114
Duke Energy Progress | Intercompany natural gas transactions | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	76	75	75
Duke Energy Florida | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	349	352	295
Duke Energy Florida | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	23	22	19
Duke Energy Ohio | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	334	329	326
Duke Energy Ohio | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	4	4
Duke Energy Indiana | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	447	409	401
Duke Energy Indiana | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	8	8	8
Piedmont | Corporate governance and shared service expenses | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	155	139	140
Piedmont | Indemnification coverages | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	3	3	3
Piedmont | Intercompany natural gas transactions | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, other revenues from transactions with related party	88	86	90
Piedmont | Natural gas storage and transportation costs | Affiliated entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 23	$ 22	$ 23

Related Party Transactions (Int

Related Party Transactions (Intercompany Income Taxes) (Details) - Affiliated entity - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax payable	$ 37	$ 62
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax receivable	95
Duke Energy Progress
Related Party Transaction [Line Items]
Intercompany income tax receivable	36
Intercompany income tax payable		84
Duke Energy Florida
Related Party Transaction [Line Items]
Intercompany income tax receivable	17	40
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax receivable		19
Intercompany income tax payable	17
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax payable	18	10
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax payable	$ 38	$ 27

Derivatives and Hedging (Notion

Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) GWh Mcf	Dec. 31, 2021 USD ($) GWh Mcf
Interest Rate Contracts
Derivative [Line Items]
Pay Notional	$ 3,479	$ 3,592
Interest Rate Contracts | Designated contracts | Cash flow hedges
Derivative [Line Items]
Pay Notional	500	2,415
Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	$ 2,979	$ 1,177
Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure, in gigawatt-hours | GWh	14,086	12,369
Commodity contracts | Natural gas (millions of Dth)
Derivative [Line Items]
Notional amount, volume in millions of dekatherms | Mcf	909	823
Duke Energy Carolinas | Interest Rate Contracts
Derivative [Line Items]
Pay Notional	$ 1,250	$ 350
Duke Energy Carolinas | Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	$ 1,250	$ 350
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of Dth)
Derivative [Line Items]
Notional amount, volume in millions of dekatherms | Mcf	307	264
Progress Energy | Interest Rate Contracts
Derivative [Line Items]
Pay Notional	$ 800	$ 500
Progress Energy | Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	$ 800	$ 500
Progress Energy | Commodity contracts | Natural gas (millions of Dth)
Derivative [Line Items]
Notional amount, volume in millions of dekatherms | Mcf	292	215
Duke Energy Progress | Interest Rate Contracts
Derivative [Line Items]
Pay Notional	$ 500	$ 500
Duke Energy Progress | Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	$ 500	$ 500
Duke Energy Progress | Commodity contracts | Natural gas (millions of Dth)
Derivative [Line Items]
Notional amount, volume in millions of dekatherms | Mcf	292	215
Duke Energy Florida | Interest Rate Contracts
Derivative [Line Items]
Pay Notional	$ 300
Duke Energy Florida | Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	300
Duke Energy Ohio | Interest Rate Contracts
Derivative [Line Items]
Pay Notional	27	$ 27
Duke Energy Ohio | Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	$ 27	$ 27
Duke Energy Ohio | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure, in gigawatt-hours | GWh	1,820	1,681
Duke Energy Indiana | Interest Rate Contracts
Derivative [Line Items]
Pay Notional	$ 300	$ 300
Duke Energy Indiana | Interest Rate Contracts | Undesignated contracts
Derivative [Line Items]
Pay Notional	$ 300	$ 300
Duke Energy Indiana | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure, in gigawatt-hours | GWh	12,266	10,688
Duke Energy Indiana | Commodity contracts | Natural gas (millions of Dth)
Derivative [Line Items]
Notional amount, volume in millions of dekatherms | Mcf	11	8
Piedmont | Commodity contracts | Natural gas (millions of Dth)
Derivative [Line Items]
Notional amount, volume in millions of dekatherms | Mcf	299	336

Derivatives and Hedging (Foreig

Derivatives and Hedging (Foreign Exchange Risk) (Details) - Foreign Currency Contracts - Designated contracts € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Pay Notional	$ 1,182
Receive notional | €		€ 1,100
Fair value gain (loss)	(5)
Senior Notes, 3.10% Due June 2028
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Pay Notional	$ 645
Pay Rate	4.75%	4.75%
Receive notional | €		€ 600
Rate	0.0310	0.0310
Fair value gain (loss)	$ (3)
Senior Notes, 3.85% Due June 2034
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Pay Notional	$ 537
Pay Rate	5.31%	5.31%
Receive notional | €		€ 500
Rate	0.0385	0.0385
Fair value gain (loss)	$ (2)

Derivatives and Hedging (Locati

Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Gross amounts recognized	$ 836	$ 320
Location and fair value amounts of derivatives liabilities	437	328
Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	594	204
Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	242	116
Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	193	157
Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	244	171
Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	478	312
Location and fair value amounts of derivatives liabilities	377	204
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	358	8
Location and fair value amounts of derivatives liabilities	2	124
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	58
Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	101	3
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		75
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		21
Designated as Hedging Instruments | Foreign Currency Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	18
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	40
Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	265	199
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	213	113
Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	175	72
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	202	132
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	228	2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	29
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		10
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	18
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Gross amounts recognized	330	162
Location and fair value amounts of derivatives liabilities	127	35
Duke Energy Carolinas | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	226	99
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	104	63
Duke Energy Carolinas | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	96	26
Duke Energy Carolinas | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	31	9
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	236	162
Location and fair value amounts of derivatives liabilities	127	27
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	94
Location and fair value amounts of derivatives liabilities		8
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	132	99
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	104	63
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	96	18
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	31	9
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		8
Progress Energy
Derivatives, Fair Value [Line Items]
Gross amounts recognized	248	124
Location and fair value amounts of derivatives liabilities	66	24
Progress Energy | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	140	74
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Progress Energy | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	36	19
Progress Energy | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	207	122
Location and fair value amounts of derivatives liabilities	66	24
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	41	2
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	99	72
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	36	19
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	41	2
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Gross amounts recognized	230	124
Location and fair value amounts of derivatives liabilities	48	10
Duke Energy Progress | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	122	74
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Duke Energy Progress | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	18	5
Duke Energy Progress | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	207	122
Location and fair value amounts of derivatives liabilities	48	10
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	23	2
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	99	72
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	18	5
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	23	2
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Duke Energy Florida | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Location and fair value amounts of derivatives liabilities	2	5
Duke Energy Ohio | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Duke Energy Ohio | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		1
Duke Energy Ohio | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	4
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	5
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		1
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	4
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Gross amounts recognized	110	23
Location and fair value amounts of derivatives liabilities	16	27
Duke Energy Indiana | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	110	23
Duke Energy Indiana | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	16	13
Duke Energy Indiana | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		14
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	29	23
Location and fair value amounts of derivatives liabilities	16	13
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	81
Location and fair value amounts of derivatives liabilities		14
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	29	23
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	16	13
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	81
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		14
Piedmont
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Location and fair value amounts of derivatives liabilities	168	139
Piedmont | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Piedmont | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	27	21
Piedmont | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	141	118
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Location and fair value amounts of derivatives liabilities	168	139
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	27	21
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	$ 141	$ 118

Derivatives and Hedging (Schedu

Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 836	$ 320
Net amounts presented in Current Assets: Other	530	179
Net amounts presented in Other Noncurrent Assets: Other	145	93
Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	594	204
Gross amounts offset	$ (64)	$ (25)
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 242	$ 116
Gross amounts offset	$ (97)	$ (23)
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 330	$ 162
Net amounts presented in Current Assets: Other	193	83
Net amounts presented in Other Noncurrent Assets: Other	64	48
Duke Energy Carolinas | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	226	99
Gross amounts offset	(33)	(16)
Duke Energy Carolinas | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	104	63
Gross amounts offset	(40)	(15)
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	248	124
Net amounts presented in Current Assets: Other	110	65
Net amounts presented in Other Noncurrent Assets: Other	51	42
Progress Energy | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	140	74
Gross amounts offset	(30)	(9)
Progress Energy | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	108	50
Gross amounts offset	(57)	(8)
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	230	124
Net amounts presented in Current Assets: Other	92	65
Net amounts presented in Other Noncurrent Assets: Other	51	42
Duke Energy Progress | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	122	74
Gross amounts offset	(30)	(9)
Duke Energy Progress | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	108	50
Gross amounts offset	(57)	(8)
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	17
Net amounts presented in Current Assets: Other	17
Duke Energy Florida | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	17
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	5	2
Net amounts presented in Current Assets: Other	5	2
Duke Energy Ohio | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	5	2
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	110	23
Net amounts presented in Current Assets: Other	110	23
Duke Energy Indiana | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 110	23
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		3
Net amounts presented in Current Assets: Other		3
Piedmont | Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		$ 3

Derivatives and Hedging (Sche_2

Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 437	$ 328
Net amounts presented in Current Liabilities: Other	144	146
Net amounts presented in Other Noncurrent Liabilities: Other	185	159
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	193	157
Gross amounts offset	$ (49)	$ (11)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 244	$ 171
Gross amounts offset	$ (59)	$ (12)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other (includes amounts related to VIEs)	Other (includes amounts related to VIEs)
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 127	$ 35
Net amounts presented in Current Liabilities: Other	81	20
Net amounts presented in Other Noncurrent Liabilities: Other	2	1
Duke Energy Carolinas | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	96	26
Gross amounts offset	(15)	(6)
Duke Energy Carolinas | Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	31	9
Gross amounts offset	(29)	(8)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	66	24
Net amounts presented in Current Liabilities: Other	18	14
Progress Energy | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	36	19
Gross amounts offset	(18)	(5)
Progress Energy | Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	30	5
Gross amounts offset	(30)	(5)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	48	10
Duke Energy Progress | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	18	5
Gross amounts offset	(18)	(5)
Duke Energy Progress | Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	30	5
Gross amounts offset	(30)	(5)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	19	14
Net amounts presented in Current Liabilities: Other	19	14
Duke Energy Florida | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	19	14
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	5
Net amounts presented in Current Liabilities: Other		1
Net amounts presented in Other Noncurrent Liabilities: Other	2	4
Duke Energy Ohio | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		1
Duke Energy Ohio | Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	4
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	16	27
Net amounts presented in Current Liabilities: Other		13
Net amounts presented in Other Noncurrent Liabilities: Other		14
Duke Energy Indiana | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	16	13
Gross amounts offset	(16)
Duke Energy Indiana | Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		14
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	168	139
Net amounts presented in Current Liabilities: Other	27	21
Net amounts presented in Other Noncurrent Liabilities: Other	141	118
Piedmont | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	27	21
Piedmont | Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 141	$ 118

Derivatives and Hedging (Deriva

Derivatives and Hedging (Derivative Instruments with Credit-Risk Related Contingent Features and Cash Collateral) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	$ 141	$ 32
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	141	32
Duke Energy Carolinas
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	86	18
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	86	18
Progress Energy
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	55	14
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	55	14
Duke Energy Progress
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	48	10
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	48	10
Duke Energy Florida
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	7	4
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	$ 7	$ 4

Investments in Debt and Equit_3

Investments in Debt and Equity Securities (Estimated Fair Value of Investments in Debt and Equity Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale
Estimated Fair Value	$ 2,815
Total Investments
Unrealized Holding Gains	3,682	$ 5,033
Unrealized Holding Losses	395	66
Estimated Fair Value	9,051	10,893
NDTF
Equity Securities, FV-NI
Gross Unrealized Holding Gains	3,658	4,905
Gross Unrealized Holding Losses	105	43
Estimated Fair Value	5,871	7,350
Debt Securities, Available-for-sale
Estimated Fair Value	2,550	2,891
Total Investments
Unrealized Holding Gains	3,661	4,992
Unrealized Holding Losses	359	63
Estimated Fair Value	8,636	10,401
NDTF | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	215	160
NDTF | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	39
Gross Unrealized Holding Losses	85	6
Estimated Fair Value	641	829
NDTF | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		14
Gross Unrealized Holding Losses	39	1
Estimated Fair Value	330	314
NDTF | U.S. government bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	2	31
Gross Unrealized Holding Losses	112	12
Estimated Fair Value	1,423	1,568
NDTF | Other debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		3
Gross Unrealized Holding Losses	18	1
Estimated Fair Value	156	180
Other Investments
Equity Securities, FV-NI
Gross Unrealized Holding Gains	21	36
Gross Unrealized Holding Losses	16
Estimated Fair Value	128	156
Debt Securities, Available-for-sale
Estimated Fair Value	265	300
Total Investments
Unrealized Holding Gains	21	41
Unrealized Holding Losses	36	3
Estimated Fair Value	415	492
Other Investments | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	22	36
Other Investments | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Gross Unrealized Holding Losses	12	1
Estimated Fair Value	84	119
Other Investments | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		3
Gross Unrealized Holding Losses	3	1
Estimated Fair Value	78	80
Other Investments | U.S. government bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	2
Estimated Fair Value	62	56
Other Investments | Other debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	3	1
Estimated Fair Value	41	45
Duke Energy Carolinas
Debt Securities, Available-for-sale
Estimated Fair Value	1,298
Duke Energy Carolinas | NDTF
Equity Securities, FV-NI
Gross Unrealized Holding Gains	2,147	2,887
Gross Unrealized Holding Losses	51	19
Estimated Fair Value	3,367	4,265
Debt Securities, Available-for-sale
Estimated Fair Value	1,298	1,441
Total Investments
Unrealized Holding Gains	2,149	2,932
Unrealized Holding Losses	192	27
Estimated Fair Value	4,782	5,759
Duke Energy Carolinas | NDTF | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	117	53
Duke Energy Carolinas | NDTF | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	24
Gross Unrealized Holding Losses	62	4
Estimated Fair Value	401	506
Duke Energy Carolinas | NDTF | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Gross Unrealized Holding Losses	10
Estimated Fair Value	64	48
Duke Energy Carolinas | NDTF | U.S. government bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	16
Gross Unrealized Holding Losses	51	3
Estimated Fair Value	685	712
Duke Energy Carolinas | NDTF | Other debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	3
Gross Unrealized Holding Losses	18	1
Estimated Fair Value	148	175
Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	1,277
Total Investments
Unrealized Holding Gains	1,512	2,062
Unrealized Holding Losses	167	36
Estimated Fair Value	3,890	4,688
Progress Energy | NDTF
Equity Securities, FV-NI
Gross Unrealized Holding Gains	1,511	2,018
Gross Unrealized Holding Losses	54	24
Estimated Fair Value	2,504	3,085
Debt Securities, Available-for-sale
Estimated Fair Value	1,252	1,450
Total Investments
Unrealized Holding Gains	1,512	2,060
Unrealized Holding Losses	167	36
Estimated Fair Value	3,854	4,642
Progress Energy | NDTF | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	98	107
Progress Energy | NDTF | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		15
Gross Unrealized Holding Losses	23	2
Estimated Fair Value	240	323
Progress Energy | NDTF | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		12
Gross Unrealized Holding Losses	29	1
Estimated Fair Value	266	266
Progress Energy | NDTF | U.S. government bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	15
Gross Unrealized Holding Losses	61	9
Estimated Fair Value	738	856
Progress Energy | NDTF | Other debt securities
Debt Securities, Available-for-sale
Estimated Fair Value	8	5
Progress Energy | Other Investments
Debt Securities, Available-for-sale
Estimated Fair Value	25	26
Total Investments
Unrealized Holding Gains		2
Estimated Fair Value	36	46
Progress Energy | Other Investments | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	11	20
Progress Energy | Other Investments | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Estimated Fair Value	25	26
Duke Energy Progress
Debt Securities, Available-for-sale
Estimated Fair Value	963
Total Investments
Unrealized Holding Gains	1,432	1,957
Unrealized Holding Losses	142	29
Estimated Fair Value	3,439	4,105
Duke Energy Progress | NDTF
Equity Securities, FV-NI
Gross Unrealized Holding Gains	1,431	1,915
Gross Unrealized Holding Losses	54	23
Estimated Fair Value	2,411	2,970
Debt Securities, Available-for-sale
Estimated Fair Value	963	1,025
Total Investments
Unrealized Holding Gains	1,432	1,957
Unrealized Holding Losses	142	29
Estimated Fair Value	3,430	4,089
Duke Energy Progress | NDTF | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	56	94
Duke Energy Progress | NDTF | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		15
Gross Unrealized Holding Losses	22	2
Estimated Fair Value	230	282
Duke Energy Progress | NDTF | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		12
Gross Unrealized Holding Losses	29	1
Estimated Fair Value	266	266
Duke Energy Progress | NDTF | U.S. government bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	15
Gross Unrealized Holding Losses	37	3
Estimated Fair Value	460	472
Duke Energy Progress | NDTF | Other debt securities
Debt Securities, Available-for-sale
Estimated Fair Value	7	5
Duke Energy Progress | Other Investments
Total Investments
Estimated Fair Value	9	16
Duke Energy Progress | Other Investments | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	9	16
Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value	314
Total Investments
Unrealized Holding Gains	80	105
Unrealized Holding Losses	25	7
Estimated Fair Value	450	582
Duke Energy Florida | NDTF
Equity Securities, FV-NI
Gross Unrealized Holding Gains	80	103
Gross Unrealized Holding Losses		1
Estimated Fair Value	93	115
Debt Securities, Available-for-sale
Estimated Fair Value	289	425
Total Investments
Unrealized Holding Gains	80	103
Unrealized Holding Losses	25	7
Estimated Fair Value	424	553
Duke Energy Florida | NDTF | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	42	13
Duke Energy Florida | NDTF | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1
Estimated Fair Value	10	41
Duke Energy Florida | NDTF | U.S. government bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	24	6
Estimated Fair Value	278	384
Duke Energy Florida | NDTF | Other debt securities
Debt Securities, Available-for-sale
Estimated Fair Value	1
Duke Energy Florida | Other Investments
Debt Securities, Available-for-sale
Estimated Fair Value	25	26
Total Investments
Unrealized Holding Gains		2
Estimated Fair Value	26	29
Duke Energy Florida | Other Investments | Cash and cash equivalents
Available-for-sale Securities
Cash and cash equivalents	1	3
Duke Energy Florida | Other Investments | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Estimated Fair Value	25	26
Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	60
Total Investments
Unrealized Holding Gains	2	7
Unrealized Holding Losses	20	1
Estimated Fair Value	140	161
Duke Energy Indiana | Other Investments
Available-for-sale Securities
Cash and cash equivalents	1
Equity Securities, FV-NI
Gross Unrealized Holding Gains	2	6
Gross Unrealized Holding Losses	16
Estimated Fair Value	79	97
Debt Securities, Available-for-sale
Estimated Fair Value	60	64
Duke Energy Indiana | Other Investments | Corporate debt securities
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1
Estimated Fair Value	8	6
Duke Energy Indiana | Other Investments | Municipal bonds
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	3	1
Estimated Fair Value	45	46
Duke Energy Indiana | Other Investments | U.S. government bonds
Debt Securities, Available-for-sale
Estimated Fair Value	$ 7	$ 12

Investments in Debt and Equit_4

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 137
Due after one through five years	807
Due after five through 10 years	469
Due after 10 years	1,402
Total	2,815
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	7
Due after one through five years	287
Due after five through 10 years	230
Due after 10 years	774
Total	1,298
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	89
Due after one through five years	443
Due after five through 10 years	193
Due after 10 years	552
Total	1,277
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	24
Due after one through five years	244
Due after five through 10 years	178
Due after 10 years	517
Total	963
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	65
Due after one through five years	199
Due after five through 10 years	15
Due after 10 years	35
Total	314
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	8
Due after one through five years	22
Due after five through 10 years	6
Due after 10 years	24
Total	$ 60

Investments in Debt and Equit_5

Investments in Debt and Equity Securities (Realized Gains and Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
FV-NI:
Realized gains	$ 201	$ 724	$ 366
Realized losses	316	141	174
AFS:
Realized gains	28	56	96
Realized losses	151	54	51
Duke Energy Carolinas
FV-NI:
Realized gains	124	440	64
Realized losses	177	96	99
AFS:
Realized gains	22	38	60
Realized losses	86	37	37
Progress Energy
FV-NI:
Realized gains	77	284	302
Realized losses	139	45	75
AFS:
Realized gains	6	16	24
Realized losses	48	14	13
Duke Energy Progress
FV-NI:
Realized gains	76	283	52
Realized losses	136	44	59
AFS:
Realized gains	6	15	24
Realized losses	44	13	13
Duke Energy Florida
FV-NI:
Realized gains	1	1	250
Realized losses	3	1	$ 16
AFS:
Realized gains		1
Realized losses	$ 4	$ 1

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurement Amounts for Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Debt securities, available-for-sale	$ 2,815
Derivative assets	836	$ 320
Total assets	9,887	11,213
Derivative liabilities	$ (437)	(327)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other (includes amounts related to VIEs)
Net assets (liabilities)	$ 9,450	10,886
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1	3
Total assets	7,030	8,667
Derivative liabilities	(16)	(13)
Net assets (liabilities)	7,014	8,654
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	801	293
Total assets	2,781	2,472
Derivative liabilities	(421)	(314)
Net assets (liabilities)	2,360	2,158
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	34	24
Total assets	34	24
Net assets (liabilities)	34	24
Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	42	50
Net assets (liabilities)	42	50
NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	215	160
Equity securities, FV-NI	5,871	7,350
Debt securities, available-for-sale	2,550	2,891
NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	215	160
Debt securities, available-for-sale	780	967
NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,770	1,924
NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	5,871	7,350
NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	5,829	7,300
NDTF equity securities | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	42	50
Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	128	156
Debt securities, available-for-sale	265	300
Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	128	156
Debt securities, available-for-sale	55	45
Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	210	255
Other cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	22	36
Other cash and cash equivalents | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	22	36
Duke Energy Carolinas
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,298
Derivative assets	330	162
Total assets	5,112	5,921
Derivative liabilities	(127)	(35)
Net assets (liabilities)	4,985	5,886
Duke Energy Carolinas | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	3,765	4,607
Net assets (liabilities)	3,765	4,607
Duke Energy Carolinas | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	330	162
Total assets	1,305	1,264
Derivative liabilities	(127)	(35)
Net assets (liabilities)	1,178	1,229
Duke Energy Carolinas | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	42	50
Net assets (liabilities)	42	50
Duke Energy Carolinas | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	117	53
Equity securities, FV-NI	3,367	4,265
Debt securities, available-for-sale	1,298	1,441
Duke Energy Carolinas | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	117	53
Equity securities, FV-NI		4,215
Debt securities, available-for-sale	323	339
Duke Energy Carolinas | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	975	1,102
Duke Energy Carolinas | NDTF | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI		50
Duke Energy Carolinas | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	3,367
Duke Energy Carolinas | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	3,325
Duke Energy Carolinas | NDTF equity securities | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	42
Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,277
Derivative assets	248	124
Total assets	4,138	4,812
Derivative liabilities	(66)	(24)
Net assets (liabilities)	4,072	4,788
Progress Energy | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	3,070	3,840
Net assets (liabilities)	3,070	3,840
Progress Energy | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	248	124
Total assets	1,068	972
Derivative liabilities	(66)	(24)
Net assets (liabilities)	1,002	948
Progress Energy | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	98	107
Equity securities, FV-NI	2,504	3,085
Debt securities, available-for-sale	1,252	1,450
Progress Energy | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	98	107
Debt securities, available-for-sale	457	628
Progress Energy | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	795	822
Progress Energy | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,504	3,085
Progress Energy | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,504	3,085
Progress Energy | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	26
Progress Energy | Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	26
Progress Energy | Other cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	11	20
Progress Energy | Other cash and cash equivalents | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	11	20
Duke Energy Progress
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	963
Derivative assets	230	124
Total assets	3,669	4,229
Derivative liabilities	(48)	(10)
Net assets (liabilities)	3,621	4,219
Duke Energy Progress | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	2,701	3,369
Net assets (liabilities)	2,701	3,369
Duke Energy Progress | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	230	124
Total assets	968	860
Derivative liabilities	(48)	(10)
Net assets (liabilities)	920	850
Duke Energy Progress | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	56	94
Equity securities, FV-NI	2,411	2,970
Debt securities, available-for-sale	963	1,025
Duke Energy Progress | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	56	94
Debt securities, available-for-sale	225	289
Duke Energy Progress | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	738	736
Duke Energy Progress | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,411	2,970
Duke Energy Progress | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,411	2,970
Duke Energy Progress | Other cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	9	16
Duke Energy Progress | Other cash and cash equivalents | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	9	16
Duke Energy Florida
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	314
Derivative assets	17
Total assets	467	582
Derivative liabilities	(19)	(14)
Net assets (liabilities)	448	568
Duke Energy Florida | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	368	470
Net assets (liabilities)	368	470
Duke Energy Florida | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	17
Total assets	99	112
Derivative liabilities	(19)	(14)
Net assets (liabilities)	80	98
Duke Energy Florida | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	42	13
Equity securities, FV-NI	93	115
Debt securities, available-for-sale	289	425
Duke Energy Florida | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	42	13
Debt securities, available-for-sale	232	339
Duke Energy Florida | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	57	86
Duke Energy Florida | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	93	115
Duke Energy Florida | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	93	115
Duke Energy Florida | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	26
Duke Energy Florida | Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	26
Duke Energy Florida | Other cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	3
Duke Energy Florida | Other cash and cash equivalents | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	3
Duke Energy Indiana
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	60
Derivative assets	110	23
Total assets	250	184
Derivative liabilities	(16)	(27)
Net assets (liabilities)	234	157
Duke Energy Indiana | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		1
Total assets	80	98
Derivative liabilities	(16)	(13)
Net assets (liabilities)	64	85
Duke Energy Indiana | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	81
Total assets	141	64
Derivative liabilities		(14)
Net assets (liabilities)	141	50
Duke Energy Indiana | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	29	22
Total assets	29	22
Net assets (liabilities)	29	22
Duke Energy Indiana | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	79	97
Debt securities, available-for-sale	60	64
Duke Energy Indiana | Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	79	97
Duke Energy Indiana | Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	60	64
Duke Energy Indiana | Other cash and cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1
Duke Energy Indiana | Other cash and cash equivalents | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1
Piedmont
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		3
Derivative liabilities	(168)	(139)
Net assets (liabilities)	(168)	(136)
Piedmont | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		3
Net assets (liabilities)		3
Piedmont | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(168)
Net assets (liabilities)	$ (168)
Piedmont | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities		(139)
Net assets (liabilities)		$ (139)

Fair Value Measurements (Reconc

Fair Value Measurements (Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Unobservable Inputs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivatives (net)
Balance at beginning of period	$ 24	$ 8
Purchases	78	21
Settlements	(36)	(20)
Total gains (losses) included on the Consolidated Balance Sheet	(32)	15
Ending balance	34	24
Duke Energy Indiana
Derivatives (net)
Balance at beginning of period	22	6
Purchases	74	18
Settlements	(32)	(16)
Total gains (losses) included on the Consolidated Balance Sheet	(35)	14
Ending balance	$ 29	$ 22

Fair Value Measurements (Quanti

Fair Value Measurements (Quantitative Level 3 Fair Value Disclosure) (Details) $ in Millions	Dec. 31, 2022 USD ($) $ / MWh	Dec. 31, 2021 USD ($) $ / MWh	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net derivative asset (liability) | $	$ 34	$ 24	$ 8
Duke Energy Ohio | FTR price – per MWh | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net derivative asset (liability) | $	$ 5	$ 2
Duke Energy Ohio | FTR price – per MWh | Minimum | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Input measurement (in usd per MWh and usd per MMBtu)	0.89	0.06
Duke Energy Ohio | FTR price – per MWh | Maximum | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Input measurement (in usd per MWh and usd per MMBtu)	6.25	1.79
Duke Energy Ohio | FTR price – per MWh | Weighted Average | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Input measurement (in usd per MWh and usd per MMBtu)	3.35	0.96
Duke Energy Indiana
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net derivative asset (liability) | $	$ 29	$ 22	$ 6
Duke Energy Indiana | FTR price – per MWh | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net derivative asset (liability) | $	$ 29	$ 22
Duke Energy Indiana | FTR price – per MWh | Minimum | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Input measurement (in usd per MWh and usd per MMBtu)	0.09	(1.18)
Duke Energy Indiana | FTR price – per MWh | Maximum | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Input measurement (in usd per MWh and usd per MMBtu)	21.79	13.11
Duke Energy Indiana | FTR price – per MWh | Weighted Average | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Input measurement (in usd per MWh and usd per MMBtu)	2.74	2.68

Fair Value Measurements (Other

Fair Value Measurements (Other Fair Value Disclosures) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	$ 71,215	$ 63,835
Long-term debt, fair value	63,454	69,683
Unamortized debt discount and premium, net	1,170	1,250
Duke Energy Carolinas
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	14,266	13,275
Long-term debt, fair value	12,943	15,101
Progress Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	22,439	20,823
Long-term debt, fair value	20,467	23,751
Duke Energy Progress
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	11,087	10,249
Long-term debt, fair value	9,689	11,252
Duke Energy Florida
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	9,709	8,482
Long-term debt, fair value	8,991	9,772
Duke Energy Ohio
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	3,245	3,193
Long-term debt, fair value	2,927	3,570
Duke Energy Indiana
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	4,307	4,323
Long-term debt, fair value	3,913	5,067
Piedmont
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	3,363	2,968
Long-term debt, fair value	$ 2,940	$ 3,278

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 28, 2021
Consolidated VIEs
Variable Interest Entity [Line Items]
Financial support		$ 0	$ 0	$ 0
ACP | Current Liabilities | Atlantic Coast Pipeline (ACP)
Variable Interest Entity [Line Items]
Guarantor obligations settled					$ 855,000,000
Atlantic Coast Pipeline (ACP) | Current Liabilities | Atlantic Coast Pipeline (ACP)
Variable Interest Entity [Line Items]
Guarantor obligations settled					$ 855,000,000
Atlantic Coast Pipeline (ACP) | Duke Energy (Parent)
Variable Interest Entity [Line Items]
Ownership interest		47%
Repayments of debt				$ 855,000,000
CRC
Variable Interest Entity [Line Items]
Variation in credit losses		10%
Variation in discount rates		20%
CRC | Consolidated VIEs
Variable Interest Entity [Line Items]
Percent of proceeds received as cash		75%
Percent of proceeds received as subordinated note		25%
Minimum Equity Balance required by Cinergy Receivables		$ 3,000,000
CRC | Duke Energy Ohio | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Fixed interest rate added to LIBOR to compute variable rate		1%
DECNCSF | Duke Energy Carolinas | Consolidated VIEs
Variable Interest Entity [Line Items]
Proceeds from issuance of senior secured bonds	$ 237,000,000
DEPNCSF | Duke Energy Progress | Consolidated VIEs
Variable Interest Entity [Line Items]
Proceeds from issuance of senior secured bonds	$ 770,000,000

Variable Interest Entities (Sch

Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Long-Term Debt	$ 67,061	$ 60,448
Duke Energy Carolinas
Variable Interest Entity [Line Items]
Long-Term Debt	12,948	12,595
Duke Energy Progress
Variable Interest Entity [Line Items]
Long-Term Debt	10,568	9,543
Duke Energy Florida
Variable Interest Entity [Line Items]
Long-Term Debt	9,381	8,406
CRC | Consolidated VIEs
Variable Interest Entity [Line Items]
Facility size	350
Long-Term Debt	350	350
Restricted Receivables	917	587
DERF | Duke Energy Carolinas | Consolidated VIEs
Variable Interest Entity [Line Items]
Facility size	500
Long-Term Debt	471	475
Restricted Receivables	928	844
DEPR | Duke Energy Progress | Consolidated VIEs
Variable Interest Entity [Line Items]
Facility size	400
Long-Term Debt	400	350
Restricted Receivables	793	574
DEFR | Duke Energy Florida | Consolidated VIEs
Variable Interest Entity [Line Items]
Facility size	250
Long-Term Debt	250	250
Restricted Receivables	$ 490	$ 427

Variable Interest Entities (Con

Variable Interest Entities (Consolidated VIEs) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Regulatory Assets: Current	$ 3,485	$ 2,150
Current Assets: Other	1,067	584
Other Assets, Noncurrent	3,400	3,632
Other Noncurrent Assets: Regulatory assets	14,645	12,487
Current Liabilities: Other	2,167	2,423
Current maturities of long-term debt	4,154	3,387
Long-Term Debt	67,061	60,448
Duke Energy Florida
Variable Interest Entity [Line Items]
Regulatory Assets: Current	1,143	497
Current Assets: Other	108	80
Other Assets, Noncurrent	372	399
Other Noncurrent Assets: Regulatory assets	2,422	1,791
Current Liabilities: Other	363	408
Current maturities of long-term debt	328	76
Long-Term Debt	9,381	8,406
Duke Energy Carolinas
Variable Interest Entity [Line Items]
Regulatory Assets: Current	1,095	544
Current Assets: Other	216	95
Other Assets, Noncurrent	1,036	1,248
Other Noncurrent Assets: Regulatory assets	4,293	2,935
Current Liabilities: Other	580	546
Current maturities of long-term debt	1,018	362
Long-Term Debt	12,948	12,595
Duke Energy Progress
Variable Interest Entity [Line Items]
Regulatory Assets: Current	690	533
Current Assets: Other	174	83
Other Assets, Noncurrent	650	792
Other Noncurrent Assets: Regulatory assets	4,724	4,118
Current Liabilities: Other	384	448
Current maturities of long-term debt	369	556
Long-Term Debt	10,568	9,543
DEFPF | Duke Energy Florida | Consolidated VIEs
Variable Interest Entity [Line Items]
Receivables of VIEs	6	5
Regulatory Assets: Current	55	54
Current Assets: Other	41	39
Other Noncurrent Assets: Regulatory assets	826	883
Current Liabilities: Other	9	9
Current maturities of long-term debt	56	56
Long-Term Debt	890	946
DECNCSF | Duke Energy Carolinas | Consolidated VIEs
Variable Interest Entity [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	8
Other Assets, Noncurrent	1	1
Other Noncurrent Assets: Regulatory assets	208	220
Current Liabilities: Other	3	1
Current maturities of long-term debt	10	5
Long-Term Debt	219	228
DEPNCSF | Duke Energy Progress | Consolidated VIEs
Variable Interest Entity [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	29
Other Assets, Noncurrent	2	4
Other Noncurrent Assets: Regulatory assets	681	720
Current Liabilities: Other	8	2
Current maturities of long-term debt	34	15
Long-Term Debt	$ 714	$ 747

Variable Interest Entities (S_2

Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Investments in equity method unconsolidated affiliates	$ 455	$ 457
Other noncurrent assets	3,400	3,632
Total Assets	178,086	169,587	$ 162,388
Other current liabilities	2,167	2,423
Other noncurrent liabilities	1,502	1,348
Duke Energy Ohio
Variable Interest Entity [Line Items]
Receivables from affiliated companies	247	122
Other noncurrent assets	71	84
Total Assets	11,506	10,774	$ 10,025
Other current liabilities	74	82
Other noncurrent liabilities	96	101
Duke Energy Ohio | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Receivables from affiliated companies	198	79
Total Assets	198	79
Net (liabilities) assets	198	79
Duke Energy Indiana
Variable Interest Entity [Line Items]
Receivables from affiliated companies	298	98
Other noncurrent assets	254	296
Total Assets	14,654	14,488
Other current liabilities	161	105
Other noncurrent liabilities	65	44
Duke Energy Indiana | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Receivables from affiliated companies	317	97
Total Assets	317	97
Net (liabilities) assets	317	97
Pipeline Investments | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Investments in equity method unconsolidated affiliates	43	15
Other noncurrent assets	45	61
Total Assets	88	76
Other current liabilities	59	47
Other noncurrent liabilities	47	54
Total liabilities	106	101
Net (liabilities) assets	$ (18)	$ (25)

Variable Interest Entities (Fai

Variable Interest Entities (Fair Value Assumptions) (Details) - CRC - Non-consolidated VIEs	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Duke Energy Ohio
Variable Interest Entity [Line Items]
Anticipated credit loss ratio	0.50%	0.50%
Discount rate	2.70%	1.10%
Receivable turnover rate	13.50%	13.50%
Duke Energy Indiana
Variable Interest Entity [Line Items]
Anticipated credit loss ratio	0.30%	0.30%
Discount rate	2.70%	1.10%
Receivable turnover rate	11.30%	11.30%

Variable Interest Entities (Rec

Variable Interest Entities (Receivables Sold) (Details) - CRC - Non-consolidated VIEs - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Duke Energy Ohio
Variable Interest Entity [Line Items]
Receivables sold	$ 423	$ 269
Less: Retained interests	198	79
Net receivables sold	225	190
Duke Energy Indiana
Variable Interest Entity [Line Items]
Receivables sold	508	328
Less: Retained interests	317	97
Net receivables sold	$ 191	$ 231

Variable Interest Entities (Sal

Variable Interest Entities (Sales and Cash Flows) (Details) - Non-consolidated VIEs - CRC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Duke Energy Ohio
Variable Interest Entity [Line Items]
Receivables sold	$ 2,562	$ 2,023	$ 1,905
Loss recognized on sale	18	10	10
Cash proceeds from receivables sold	2,424	2,018	1,875
Collection fees received	1	1	1
Return received on retained interests	10	4	4
Duke Energy Indiana
Variable Interest Entity [Line Items]
Receivables sold	3,744	2,909	2,631
Loss recognized on sale	26	13	12
Cash proceeds from receivables sold	3,498	2,909	2,586
Collection fees received	2	1	1
Return received on retained interests	$ 15	$ 6	$ 5

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 184
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 61
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 66
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 36
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 16
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 8
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 8
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 168
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 53
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 58
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 36
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 71
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 11
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 16
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 17
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 15
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 7
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 532
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 68
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 62
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 61
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 51
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 49
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 241
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									$ 28,675	$ 24,486	$ 23,253
Revenue from sources other than contracts with customers									93	135	113
Total operating revenues	$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	28,768	24,621	23,366
Other
Disaggregation of Revenue [Line Items]
Total operating revenues									1,411	1,064	1,001
Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									25,888	22,474	21,637
Total operating revenues									25,990	22,570	21,687
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									11,377	10,097	9,806
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									7,356	6,375	6,194
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									3,504	2,924	2,859
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,856	2,199	1,864
Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									795	879	914
Total operating revenues									1,106	977	944
Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,757	1,983	1,590
Total operating revenues									2,748	2,022	1,653
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,462	1,131	930
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									765	561	446
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									170	158	127
Gas Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									360	133	87
Total operating revenues									305	87	57
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									30	29	26
Total operating revenues									30	29	26
Duke Energy Carolinas
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									7,855	7,145	7,028
Revenue from sources other than contracts with customers									2	(43)	(13)
Total operating revenues									7,857	7,102	7,015
Duke Energy Carolinas | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									7,855	7,145	7,028
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									3,275	3,054	2,997
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,396	2,210	2,233
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,251	1,145	1,137
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									561	472	380
Duke Energy Carolinas | Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									372	264	281
Progress Energy
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									13,082	10,962	10,521
Revenue from sources other than contracts with customers									43	95	106
Total operating revenues									13,125	11,057	10,627
Progress Energy | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									13,082	10,962	10,521
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									5,812	5,084	5,017
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									3,396	2,883	2,779
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,095	894	901
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,785	1,385	1,228
Progress Energy | Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									994	716	596
Duke Energy Progress
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									6,742	5,719	5,348
Revenue from sources other than contracts with customers									11	61	74
Total operating revenues									6,753	5,780	5,422
Duke Energy Progress | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									6,742	5,719	5,348
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,378	2,156	2,059
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,480	1,378	1,312
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									770	634	649
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,346	1,164	1,034
Duke Energy Progress | Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									768	387	294
Duke Energy Florida
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									6,340	5,243	5,173
Revenue from sources other than contracts with customers									13	16	15
Total operating revenues									6,353	5,259	5,188
Duke Energy Florida | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									6,340	5,243	5,173
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									3,434	2,928	2,958
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,916	1,505	1,467
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									325	260	252
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									439	221	194
Duke Energy Florida | Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									226	329	302
Duke Energy Ohio
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,486	2,026	1,870
Revenue from sources other than contracts with customers									28	11	(12)
Total operating revenues									2,514	2,037	1,858
Duke Energy Ohio | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,769	1,481	1,419
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									862	767	726
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									517	440	442
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									202	135	137
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									127	56	32
Duke Energy Ohio | Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									61	83	82
Duke Energy Ohio | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									717	545	451
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									488	354	300
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									180	143	117
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									24	20	17
Duke Energy Ohio | Gas Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									25	28	17
Duke Energy Indiana
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									3,837	3,134	2,783
Revenue from sources other than contracts with customers									85	40	12
Total operating revenues									3,922	3,174	2,795
Duke Energy Indiana | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									3,837	3,134	2,783
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,430	1,188	1,064
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									1,049	825	740
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									956	750	683
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									383	285	224
Duke Energy Indiana | Electric Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									19	86	72
Piedmont
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,068	1,469	1,173
Revenue from sources other than contracts with customers									56	100	124
Total operating revenues									2,124	1,569	1,297
Piedmont | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									2,068	1,469	1,173
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									974	777	630
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									585	418	329
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									144	137	110
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									94	92	34
Piedmont | Gas Utilities and Infrastructure | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									$ 271	$ 45	$ 70

Revenue (Reserve for Credit Los

Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 121	$ 146	$ 76
Cumulative Change in Accounting Principle	216	121	146
Write-Offs	(158)	(58)	(58)
Credit Loss Expense	160	53	75
Other Adjustments	93	(20)	48
Ending balance	216	121	146
Duke Energy Carolinas
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	42	23	10
Cumulative Change in Accounting Principle	68	42	23
Write-Offs	(73)	(21)	(13)
Credit Loss Expense	40	27	13
Other Adjustments	59	13	12
Ending balance	68	42	23
Progress Energy
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	36	37	16
Cumulative Change in Accounting Principle	81	36	37
Write-Offs	(70)	(25)	(23)
Credit Loss Expense	72	25	29
Other Adjustments	43	(1)	13
Ending balance	81	36	37
Duke Energy Progress
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	21	23	8
Cumulative Change in Accounting Principle	44	21	23
Write-Offs	(36)	(12)	(8)
Credit Loss Expense	17	11	9
Other Adjustments	42	(1)	13
Ending balance	44	21	23
Duke Energy Florida
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	16	14	7
Cumulative Change in Accounting Principle	36	16	14
Write-Offs	(34)	(13)	(14)
Credit Loss Expense	55	14	20
Other Adjustments	(1)	1
Ending balance	36	16	14
Duke Energy Ohio
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4	4	4
Cumulative Change in Accounting Principle	6	4	4
Credit Loss Expense	2
Ending balance	6	4	4
Duke Energy Indiana
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	3	3	3
Cumulative Change in Accounting Principle	4	3	3
Credit Loss Expense	1
Ending balance	4	3	3
Piedmont
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	15	12	6
Cumulative Change in Accounting Principle	14	15	12
Write-Offs	(12)	(9)	(6)
Credit Loss Expense	11	7	11
Other Adjustments		5
Ending balance	$ 14	$ 15	12
Cumulative Change in Accounting Principle
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			5
Cumulative Change in Accounting Principle
Cumulative Change in Accounting Principle | Duke Energy Carolinas
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			1
Cumulative Change in Accounting Principle
Cumulative Change in Accounting Principle | Progress Energy
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			2
Cumulative Change in Accounting Principle
Cumulative Change in Accounting Principle | Duke Energy Progress
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			1
Cumulative Change in Accounting Principle
Cumulative Change in Accounting Principle | Duke Energy Florida
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			1
Cumulative Change in Accounting Principle
Cumulative Change in Accounting Principle | Piedmont
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 1
Cumulative Change in Accounting Principle

Revenue (Aging of Trade Receiva

Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Unbilled receivables	$ 1,457	$ 922
Current	2,347	1,941
Deferred Payment Arrangements	160	115
Trade and Other Receivables	4,631	3,643
1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	261	288
30-60 days
Financing Receivable, Past Due [Line Items]
Past due	123	98
60-90 days
Financing Receivable, Past Due [Line Items]
Past due	74	118
91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	209	161
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled receivables	486	316
Current	577	592
Deferred Payment Arrangements	57	55
Trade and Other Receivables	1,334	1,186
Duke Energy Carolinas | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	96	77
Duke Energy Carolinas | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	23	30
Duke Energy Carolinas | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	25	32
Duke Energy Carolinas | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	70	84
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled receivables	355	266
Current	1,059	716
Deferred Payment Arrangements	62	45
Trade and Other Receivables	1,689	1,289
Progress Energy | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	60	128
Progress Energy | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	61	49
Progress Energy | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	18	48
Progress Energy | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	74	37
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled receivables	232	193
Current	637	405
Deferred Payment Arrangements	35	22
Trade and Other Receivables	1,004	722
Duke Energy Progress | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	15	44
Duke Energy Progress | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	49	21
Duke Energy Progress | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	9	28
Duke Energy Progress | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	27	9
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled receivables	123	73
Current	417	311
Deferred Payment Arrangements	27	23
Trade and Other Receivables	680	565
Duke Energy Florida | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	45	82
Duke Energy Florida | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	12	28
Duke Energy Florida | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	9	20
Duke Energy Florida | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	47	28
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled receivables	20	4
Current	15	42
Deferred Payment Arrangements	4	2
Trade and Other Receivables	79	100
Duke Energy Ohio | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	5	4
Duke Energy Ohio | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	6	1
Duke Energy Ohio | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	3	23
Duke Energy Ohio | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	26	24
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled receivables	28	27
Current	52	50
Trade and Other Receivables	116	103
Duke Energy Indiana | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	17	5
Duke Energy Indiana | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	2	10
Duke Energy Indiana | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	11	5
Duke Energy Indiana | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	6	6
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled receivables	160	106
Current	265	202
Deferred Payment Arrangements	1	4
Trade and Other Receivables	450	333
Piedmont | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	15	12
Piedmont | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	3	2
Piedmont | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	2	4
Piedmont | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	$ 4	$ 3

Revenue (Unbilled Revenues) (De

Revenue (Unbilled Revenues) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	$ 1,457	$ 922
Duke Energy Carolinas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	486	316
Progress Energy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	355	266
Duke Energy Progress
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	232	193
Duke Energy Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	123	73
Duke Energy Ohio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	20	4
Duke Energy Ohio | CRC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	148	82
Duke Energy Indiana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	28	27
Duke Energy Indiana | CRC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	260	121
Piedmont
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivables	$ 160	$ 106

Stockholders' Equity (Earnings

Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended								12 Months Ended
	Sep. 16, 2024	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Net Income available to Duke Energy common stockholders		$ (650)	$ 1,383	$ 893	$ 818	$ 732	$ 1,366	$ 751	$ 953	$ 2,444	$ 3,802	$ 1,270
Net income from discontinued operations attributable to Duke Energy Corporation										(1,215)	200	289
Accumulated preferred stock dividends adjustment												1
Less: Impact of participating securities										2	3	2
Income from continuing operations available to Duke Energy common stockholders										3,657	3,599	980
(Loss) Income from discontinued operations, net of tax		(1,293)	3	(18)	(15)	(36)	(57)	(25)	(26)	(1,323)	(144)	(7)
Loss From Discontinued Operations, net of tax		$ 1,293	$ (3)	$ 18	$ 15	$ 36	$ 57	$ 25	$ 26	1,323	144	7
Add: Net loss attributable to noncontrolling interest included in discontinued operations										$ 108	$ 344	$ 296
Weighted average common shares outstanding – basic (in shares)										770	769	737
Equity forwards (in shares)												1
Weighted average common shares outstanding – diluted (in shares)										770	769	738
EPS from continuing operations available to Duke Energy common stockholders
Basic (usd per share)		$ 0.80	$ 1.78	$ 1.11	$ 1.06	$ 0.86	$ 1.69	$ 0.90	$ 1.22	$ 4.74	$ 4.68	$ 1.33
Diluted (usd per share)		0.80	$ 1.78	$ 1.11	$ 1.06	$ 0.86	$ 1.69	$ 0.90	$ 1.22	4.74	4.68	1.33
(Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders
Basic (usd per share)										(1.57)	0.26	0.39
Diluted (usd per share)										$ (1.57)	$ 0.26	$ 0.39
Potentially dilutive items excluded from the calculation (in shares)										2	2	2
Dividends declared per share (usd per share)										$ 3.98	$ 3.90	$ 3.82
Series A Preferred Stock
(Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders
Dividends declared on preferred stock (usd per share)										$ 1.437	1.437	1.437
Cumulative annual dividend rate (as a percent)										5.75%
Liquidation preference per share (in usd per share)		25								$ 25
Series B Preferred Stock
(Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders
Dividends declared on preferred stock (usd per share)										$ 48.750	$ 48.750	$ 49.292
Cumulative annual dividend rate (as a percent)										4.875%
Liquidation preference per share (in usd per share)		$ 1,000								$ 1,000
Series B Preferred Stock | Forecast
(Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders
Cumulative annual dividend rate (as a percent)	3.388%

Stockholders' Equity (Common St

Stockholders' Equity (Common Stock) (Details) - USD ($) $ / shares in Units, $ in Billions	1 Months Ended
	Nov. 30, 2022	Jun. 15, 2024	Dec. 31, 2022
Equity [Abstract]
Maximum value of shares to be issued under ATM program	$ 1.5
Class of Stock [Line Items]
Maximum value of shares to be issued under ATM program	$ 1.5
Forecast
Class of Stock [Line Items]
Redemption price (in usd per share)		$ 25
Series A Preferred Stock
Class of Stock [Line Items]
Redemption price (in usd per share)			$ 25.50
Liquidation preference per share (in usd per share)			25
Series B Preferred Stock
Class of Stock [Line Items]
Redemption price (in usd per share)			1,020
Liquidation preference per share (in usd per share)			$ 1,000

Severance (Narrative) (Details)

Severance (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Regulatory assets	$ 18,130	$ 14,637
Duke Energy Carolinas
Restructuring Cost and Reserve [Line Items]
Regulatory assets	5,388	3,479
Duke Energy Carolinas | Employee Severance
Restructuring Cost and Reserve [Line Items]
Regulatory assets			$ 65
Duke Energy Progress
Restructuring Cost and Reserve [Line Items]
Regulatory assets	$ 5,414	$ 4,651
Duke Energy Progress | Employee Severance
Restructuring Cost and Reserve [Line Items]
Regulatory assets			$ 33

Severance (Expenses) (Details)

Severance (Expenses) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) employee	Dec. 31, 2021 USD ($) employee	Dec. 31, 2020 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Number of eligible employees | employee	233	290	30
Severance expense	$ 65	$ 69	$ (85)
Amortization of deferred severance charges	33	33
Severance charges adjustments	(19)	(3)	(6)
Unamortized deferred severance			(86)
Duke Energy Carolinas
Restructuring Cost and Reserve [Line Items]
Severance expense	40	33	(58)
Amortization of deferred severance charges	22	22
Severance charges adjustments	(6)	(2)	(2)
Unamortized deferred severance			(57)
Progress Energy
Restructuring Cost and Reserve [Line Items]
Severance expense	20	26	(28)
Amortization of deferred severance charges	11	11
Severance charges adjustments	(8)		(3)
Unamortized deferred severance			(29)
Duke Energy Progress
Restructuring Cost and Reserve [Line Items]
Severance expense	17	20	(31)
Amortization of deferred severance charges	11	11
Severance charges adjustments	(4)		(2)
Unamortized deferred severance			(29)
Duke Energy Florida
Restructuring Cost and Reserve [Line Items]
Severance expense	3	6	3
Severance charges adjustments	(4)
Duke Energy Ohio
Restructuring Cost and Reserve [Line Items]
Severance expense	1	2
Severance charges adjustments	(1)
Duke Energy Indiana
Restructuring Cost and Reserve [Line Items]
Severance expense	2	3	0
Severance charges adjustments	(2)	(1)
Piedmont
Restructuring Cost and Reserve [Line Items]
Severance expense	2	$ 2	$ 0
Severance charges adjustments	$ (1)

Severance (Rollforward) (Detail

Severance (Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 39	$ 11
Provision/Adjustments	33	36
Cash Reductions	(8)	(8)
Balance, end of period	64	39
Duke Energy Carolinas
Restructuring Reserve [Roll Forward]
Balance, beginning of period	2	2
Provision/Adjustments	14	1
Cash Reductions	(1)	(1)
Balance, end of period	15	2
Progress Energy
Restructuring Reserve [Roll Forward]
Balance, beginning of period	2	3
Provision/Adjustments	4	1
Cash Reductions		(2)
Balance, end of period	6	2
Duke Energy Progress
Restructuring Reserve [Roll Forward]
Balance, beginning of period	1	1
Provision/Adjustments	3	1
Cash Reductions		(1)
Balance, end of period	4	1
Duke Energy Florida
Restructuring Reserve [Roll Forward]
Balance, beginning of period	1	2
Provision/Adjustments	1
Cash Reductions	0	(1)
Balance, end of period	2	1
Duke Energy Indiana
Restructuring Reserve [Roll Forward]
Balance, beginning of period		1
Cash Reductions		$ (1)
Piedmont
Restructuring Reserve [Roll Forward]
Provision/Adjustments	1
Balance, end of period	$ 1

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for awards to employees and outside directors (in shares)	10
RSU awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total grant date fair value of shares vested	$ 49	$ 45	$ 43
Unrecognized compensation cost	$ 34
Unrecognized compensation cost, period of recognition (in years)	23 months
RSU awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Performance awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Total grant date fair value of shares vested	$ 25	$ 25
Unrecognized compensation cost	$ 22
Unrecognized compensation cost, period of recognition (in years)	22 months
Risk free interest rate	1.78%
Expected volatility rate	26.80%
Performance awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percent	200%
Performance awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percent	0%

Stock-Based Compensation (Sched

Stock-Based Compensation (Schedule of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	$ 74	$ 64	$ 61
Pretax stock-based compensation cost	100	88	84
Stock-based compensation costs capitalized	5	5	5
Stock-based compensation expense	95	83	79
Tax benefit associated with stock-based compensation expense	21	19	18
RSU awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax stock-based compensation cost	58	49	46
Performance awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax stock-based compensation cost	42	39	38
Duke Energy Carolinas
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	27	23	22
Progress Energy
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	27	24	23
Duke Energy Progress
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	17	15	15
Duke Energy Florida
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	10	9	9
Duke Energy Ohio
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	5	5	4
Duke Energy Indiana
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	7	6	6
Piedmont
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expense recognized	$ 4	$ 3	$ 3

Stock-Based Compensation (Summa

Stock-Based Compensation (Summary of Stock Awards Outstanding) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
RSU awards
Schedule Of Shares Awarded [Abstract]
Shares granted (in thousands)	654	673	498
Fair value (in millions)	$ 64	$ 59	$ 50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	1,043
Granted (in shares)	654	673	498
Vested (in shares)	(527)
Forfeited (in shares)	(73)
Outstanding at end of period (in shares)	1,097	1,043
Stock awards expected to vest (in shares)	1,056
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average fair value at beginning of period (usd per share)	$ 92
Granted (usd per share)	98
Vested (usd per share)	93
Forfeited (usd per share)	94
Weighted average fair value at end of period (usd per share)	95	$ 92
Weighted average fair value of awards expected to vest (usd per share)	$ 95
Performance awards
Schedule Of Shares Awarded [Abstract]
Shares granted (in thousands)	408	380	319
Fair value (in millions)	$ 40	$ 33	$ 34
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	952
Granted (in shares)	408	380	319
Vested (in shares)	(297)
Forfeited (in shares)	(30)
Outstanding at end of period (in shares)	1,033	952
Stock awards expected to vest (in shares)	1,006
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average fair value at beginning of period (usd per share)	$ 93
Granted (usd per share)	99
Vested (usd per share)	86
Forfeited (usd per share)	96
Weighted average fair value at end of period (usd per share)	97	$ 93
Weighted average fair value of awards expected to vest (usd per share)	$ 97

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2023
Defined Benefit Plan Disclosure [Line Items]
Maximum years of participation (in years)	35 years
Vesting period (in years)	3 years
Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 24
Duke Energy Retirement Cash Balance Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	117
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	22
Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 95
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100%
Fair value of securities on loan	$ 390	$ 542
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	58
Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (1,547)	513
Average remaining service period (in years)	13 years
Projected benefit obligation	$ 6,358	8,207	$ 8,634
Accumulated Benefit Obligation at measurement date	6,324	8,144
Employer contributions	58
Benefits paid	$ 753	$ 615
Expected long-term rate of return on plan assets	6.50%	6.50%	6.85%
Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 232
Accumulated Benefit Obligation at measurement date	232
Employer contributions	24
Benefits paid	$ 24
Pension Plan | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Master trust allocation percentage	98%
Expected long-term rate of return on plan assets	6.50%
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (31)	$ 15
Average remaining service period (in years)	7 years
Projected benefit obligation	$ 437	625	$ 709
Employer contributions	39
Benefits paid	$ 68	$ 73
Expected long-term rate of return on plan assets	6.50%	6.50%	6.85%
Other Post-Retirement Benefit Plans | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Master trust allocation percentage	2%
Expected long-term rate of return on plan assets	8.25%
Target allocation	100%
Duke Energy Progress | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 5
Duke Energy Progress | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	16
Duke Energy Progress | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	8
Duke Energy Progress | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (240)	$ 79
Average remaining service period (in years)	13 years
Projected benefit obligation	$ 909	1,153	$ 1,193
Employer contributions	8
Benefits paid	101	80
Duke Energy Progress | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	24
Accumulated Benefit Obligation at measurement date	24
Employer contributions	3
Benefits paid	$ 3
Duke Energy Progress | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	5 years
Projected benefit obligation	$ 95	147	166
Employer contributions	11
Benefits paid	13	16
Duke Energy Ohio | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	5
Duke Energy Ohio | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	3
Duke Energy Ohio | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (68)	26
Average remaining service period (in years)	15 years
Projected benefit obligation	$ 333	450	502
Accumulated Benefit Obligation at measurement date	327	439
Employer contributions	3
Benefits paid	50	50
Duke Energy Ohio | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3
Accumulated Benefit Obligation at measurement date	3
Duke Energy Ohio | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (2)	1
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 20	25	27
Employer contributions	3
Benefits paid	4	3
Progress Energy | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	5
Progress Energy | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	23
Progress Energy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	13
Progress Energy | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (506)	169
Average remaining service period (in years)	14 years
Projected benefit obligation	$ 1,975	2,560	2,715
Accumulated Benefit Obligation at measurement date	1,959	2,529
Employer contributions	13
Benefits paid	184	161
Progress Energy | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	78
Accumulated Benefit Obligation at measurement date	78
Employer contributions	10
Benefits paid	$ 10
Progress Energy | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	5 years
Projected benefit obligation	$ 168	263	299
Employer contributions	23
Benefits paid	$ 26	29
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Fair value evaluation period (in years)	5 years
Duke Energy Florida | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 1
Duke Energy Florida | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	7
Duke Energy Florida | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	5
Duke Energy Florida | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (262)	90
Average remaining service period (in years)	15 years
Projected benefit obligation	$ 1,055	1,392	1,507
Accumulated Benefit Obligation at measurement date	1,038	1,361
Employer contributions	5
Benefits paid	82	81
Duke Energy Florida | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	32
Accumulated Benefit Obligation at measurement date	32
Employer contributions	4
Benefits paid	$ 4
Duke Energy Florida | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	7 years
Projected benefit obligation	$ 69	112	130
Employer contributions	11
Benefits paid	13	13
Duke Energy Carolinas | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	3
Duke Energy Carolinas | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	35
Duke Energy Carolinas | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	15
Duke Energy Carolinas | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (411)	132
Average remaining service period (in years)	12 years
Projected benefit obligation	$ 1,554	1,903	1,988
Employer contributions	15
Benefits paid	159	148
Duke Energy Carolinas | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	10
Accumulated Benefit Obligation at measurement date	10
Employer contributions	1
Benefits paid	1
Duke Energy Carolinas | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (19)	9
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 112	149	174
Employer contributions	3
Benefits paid	16	19
Duke Energy Indiana | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	8
Duke Energy Indiana | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	5
Duke Energy Indiana | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (107)	37
Average remaining service period (in years)	14 years
Projected benefit obligation	$ 499	680	715
Accumulated Benefit Obligation at measurement date	495	672
Employer contributions	5
Benefits paid	66	52
Duke Energy Indiana | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	2
Accumulated Benefit Obligation at measurement date	$ 2
Duke Energy Indiana | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 30	54	61
Employer contributions	4
Benefits paid	$ 8	9
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Term (in years)	3 years
Piedmont | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 6
Piedmont | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	29
Piedmont | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	2
Piedmont | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (64)	19
Average remaining service period (in years)	9 years
Projected benefit obligation	$ 170	273	293
Accumulated Benefit Obligation at measurement date	170
Employer contributions	2
Benefits paid	69	28
Piedmont | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3
Accumulated Benefit Obligation at measurement date	3
Piedmont | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (7)	3
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 21	27	$ 30
Employer contributions	1
Benefits paid	$ 2	$ 2
Liability Hedging Assets | Pension Plan | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				35%
Liability Hedging Assets | Other Post-Retirement Benefit Plans | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				80%
Return Seeking Assets | Pension Plan | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				65%
Return Seeking Assets | Other Post-Retirement Benefit Plans | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				20%
Minimum | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets

Employee Benefit Plans (Contrib

Employee Benefit Plans (Contributions to Defined Benefit Pension Plans) (Details) - Pension Plan $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 58
Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	15
Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	13
Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	8
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	5
Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	3
Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	5
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 2

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amortization of regulatory asset	$ 3	$ 3	$ 4
Pension Plan | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	152	176
Service cost	145	168	165
Interest cost	249	220	269
Expected return on plan assets	(558)	(558)	(572)
Amortization of prior service credit	81	133	128
Amortization of prior service cost (credit)	(18)	(29)	(32)
Amortization of settlement charges(c)			18
Amortization of settlement charges	32	9
MRVA method change	24
Net periodic costs	(38)	(49)	(24)
Pension Plan | Duke Energy Carolinas | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	48	56
Service cost	47	54	51
Interest cost	59	51	62
Expected return on plan assets	(152)	(141)	(145)
Amortization of prior service credit	16	29	28
Amortization of prior service cost (credit)	(3)	(8)	(8)
Amortization of settlement charges(c)			9
Amortization of settlement charges	9	5
MRVA method change	0
Net periodic costs	(23)	(8)	(3)
Pension Plan | Progress Energy | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	43	50
Service cost	40	48	48
Interest cost	77	70	85
Expected return on plan assets	(183)	(187)	(190)
Amortization of prior service credit	23	38	41
Amortization of prior service cost (credit)		(2)	(3)
Amortization of settlement charges(c)			7
Amortization of settlement charges	8	2
MRVA method change	24
Net periodic costs	(8)	(29)	(12)
Pension Plan | Duke Energy Progress | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	25	29
Service cost	24	28	27
Interest cost	35	30	38
Expected return on plan assets	(88)	(84)	(87)
Amortization of prior service credit	12	18	18
Amortization of prior service cost (credit)		(1)	(2)
Amortization of settlement charges(c)			6
Amortization of settlement charges	7	2
MRVA method change	0
Net periodic costs	(9)	(6)
Pension Plan | Duke Energy Florida | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	17	21
Service cost	16	20	21
Interest cost	41	39	46
Expected return on plan assets	(94)	(102)	(101)
Amortization of prior service credit	12	20	23
Amortization of prior service cost (credit)		(1)	(1)
Amortization of settlement charges(c)			1
Amortization of settlement charges	1	1
MRVA method change	24
Net periodic costs	1	(22)	(11)
Pension Plan | Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amortization of regulatory asset	1	1	2
Pension Plan | Duke Energy Ohio | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	4	5
Service cost	4	5	5
Interest cost	13	13	15
Expected return on plan assets	(23)	(28)	(28)
Amortization of prior service credit	4	7	6
Amortization of prior service cost (credit)		(1)
Amortization of settlement charges	5
MRVA method change	0
Net periodic costs	3	(4)	(2)
Pension Plan | Duke Energy Indiana | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	10
Service cost	8	9	9
Interest cost	20	18	22
Expected return on plan assets	(37)	(40)	(42)
Amortization of prior service credit	9	13	12
Amortization of prior service cost (credit)	(2)	(2)	(2)
Amortization of settlement charges(c)			1
Amortization of settlement charges	1
MRVA method change	0
Net periodic costs		(1)
Pension Plan | Piedmont | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	5	6
Service cost	5	6	6
Interest cost	8	7	9
Expected return on plan assets	(24)	(20)	(21)
Amortization of prior service credit	5	10	9
Amortization of prior service cost (credit)	(7)	(9)	(9)
Amortization of settlement charges(c)			1
Amortization of settlement charges	7	1
MRVA method change	0
Net periodic costs	(6)	(5)	(5)
Other Post-Retirement Benefit Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	3	4	4
Interest cost	17	18	23
Expected return on plan assets	(10)	(11)	(13)
Amortization of prior service credit	2	2	2
Amortization of prior service cost (credit)	(8)	(13)	(14)
Net periodic costs	4		2
Amortization of regulatory asset	4	5	6
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	1
Interest cost	4	4	5
Expected return on plan assets	(6)	(7)	(8)
Amortization of prior service cost (credit)	(3)	(4)	(4)
Net periodic costs	(4)	(6)	(6)
Other Post-Retirement Benefit Plans | Progress Energy
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost		1	1
Interest cost	7	7	10
Amortization of prior service credit	1	1	1
Amortization of prior service cost (credit)	(2)	(2)	(3)
Net periodic costs	6	7	9
Other Post-Retirement Benefit Plans | Duke Energy Progress
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	4	4	5
Amortization of prior service credit	1
Amortization of prior service cost (credit)	(1)	(1)	(1)
Net periodic costs	4	3	4
Other Post-Retirement Benefit Plans | Duke Energy Florida
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	3	3	4
Amortization of prior service credit	1	1	1
Amortization of prior service cost (credit)	(1)	(1)	(2)
Net periodic costs	3	3	3
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	1	1	1
Amortization of prior service cost (credit)		(1)	(1)
Net periodic costs	1
Amortization of regulatory asset	1	1	1
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost		1	1
Interest cost	1	1	2
Amortization of prior service credit		4	4
Amortization of prior service cost (credit)		(1)	(1)
Net periodic costs	1	5	6
Other Post-Retirement Benefit Plans | Piedmont
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	1	1	1
Expected return on plan assets	(2)	(2)	(2)
Amortization of prior service cost (credit)	(2)	(2)	(2)
Net periodic costs	$ (3)	$ (3)	$ (3)

Employee Benefit Plans (Amounts

Employee Benefit Plans (Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) [Abstract]
Net amount recognized in accumulated other comprehensive income	[1]	$ 19	$ (7)	$ (6)
Progress Energy
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) [Abstract]
Net amount recognized in accumulated other comprehensive income		(5)	(1)	$ 1
Pension Plan | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		367	(261)
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) [Abstract]
Deferred income tax expense		(7)	1
Amortization of prior year actuarial gain		37	(8)
Amortization of prior year service credit			1
Net amount recognized in accumulated other comprehensive income		30	(6)
Pension Plan | Duke Energy Carolinas | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		221	(57)
Pension Plan | Progress Energy | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		107	(128)
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) [Abstract]
Deferred income tax expense		(1)
Amortization of prior year actuarial gain		2	(1)
Net amount recognized in accumulated other comprehensive income		1	(1)
Pension Plan | Duke Energy Progress | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		101	(31)
Pension Plan | Duke Energy Florida | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		5	(97)
Pension Plan | Duke Energy Ohio | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(1)	(17)
Pension Plan | Duke Energy Indiana | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(12)	(19)
Pension Plan | Piedmont | Qualified Plan
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		9	(5)
Other Post-Retirement Benefit Plans
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(79)	(15)
Regulatory liabilities, net increase (decrease)		27	23
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) [Abstract]
Amortization of prior year actuarial gain		1
Amortization of prior year actuarial gain			(1)
Net amount recognized in accumulated other comprehensive income		1	(1)
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory liabilities, net increase (decrease)			12
Other Post-Retirement Benefit Plans | Progress Energy
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(80)	(18)
Other Post-Retirement Benefit Plans | Duke Energy Progress
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(45)	(9)
Other Post-Retirement Benefit Plans | Duke Energy Florida
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(36)	(9)
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)			4
Regulatory liabilities, net increase (decrease)			4
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory assets, net increase (decrease)		(3)	(4)
Regulatory liabilities, net increase (decrease)		19	1
Other Post-Retirement Benefit Plans | Piedmont
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]
Regulatory liabilities, net increase (decrease)		$ (5)	$ 2
[1]Net of income tax expense of approximately $52 million for the year ended December 31, 2022, and income tax benefit of approximately $17 million and $35 million for the years ended December 31, 2021, and 2020, respectively.

Employee Benefit Plans (Project

Employee Benefit Plans (Projected Benefit Obligations Reconciliation of Funded Status to Net Amount Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	$ 58
Pension Plan | Duke Energy Carolinas
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	15
Pension Plan | Progress Energy
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	13
Pension Plan | Duke Energy Progress
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	8
Pension Plan | Duke Energy Florida
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	5
Pension Plan | Duke Energy Ohio
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	3
Pension Plan | Duke Energy Indiana
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	5
Pension Plan | Piedmont
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	2
Pension Plan | Qualified Plan
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	8,207	$ 8,634
Service cost	145	168	$ 165
Interest cost	249	220	269
Actuarial gain	(1,490)	(200)
Benefits paid	(753)	(615)
Obligation at measurement date	6,358	8,207	8,634
Accumulated Benefit Obligation at measurement date	6,324	8,144
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	9,235	9,337
Employer contributions	58
Actual return on plan assets	(1,547)	513
Benefits paid	(753)	(615)
Plan assets at measurement date	6,993	9,235	9,337
Funded status of plan	635	1,028
Pension Plan | Qualified Plan | Duke Energy Carolinas
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	1,903	1,988
Service cost	47	54	51
Interest cost	59	51	62
Actuarial gain	(301)	(42)
Benefits paid	(159)	(148)
Transfers	5
Obligation at measurement date	1,554	1,903	1,988
Accumulated Benefit Obligation at measurement date	1,556	1,904
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	2,365	2,381
Employer contributions	15
Actual return on plan assets	(411)	132
Benefits paid	(159)	(148)
Transfers	5
Plan assets at measurement date	1,815	2,365	2,381
Funded status of plan	261	462
Pension Plan | Qualified Plan | Progress Energy
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	2,560	2,715
Service cost	40	48	48
Interest cost	77	70	85
Actuarial gain	(513)	(108)
Benefits paid	(184)	(161)
Transfers	(5)	(4)
Obligation at measurement date	1,975	2,560	2,715
Accumulated Benefit Obligation at measurement date	1,959	2,529
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	3,053	3,049
Employer contributions	13
Actual return on plan assets	(506)	169
Benefits paid	(184)	(161)
Transfers	(5)	(4)
Plan assets at measurement date	2,371	3,053	3,049
Funded status of plan	396	493
Pension Plan | Qualified Plan | Duke Energy Progress
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	1,153	1,193
Service cost	24	28	27
Interest cost	35	30	38
Actuarial gain	(197)	(18)
Benefits paid	(101)	(80)
Transfers	(5)
Obligation at measurement date	909	1,153	1,193
Accumulated Benefit Obligation at measurement date	910	1,154
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	1,421	1,422
Employer contributions	8
Actual return on plan assets	(240)	79
Benefits paid	(101)	(80)
Transfers	(5)
Plan assets at measurement date	1,083	1,421	1,422
Funded status of plan	174	268
Pension Plan | Qualified Plan | Duke Energy Florida
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	1,392	1,507
Service cost	16	20	21
Interest cost	41	39	46
Actuarial gain	(312)	(89)
Benefits paid	(82)	(81)
Transfers		(4)
Obligation at measurement date	1,055	1,392	1,507
Accumulated Benefit Obligation at measurement date	1,038	1,361
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	1,610	1,605
Employer contributions	5
Actual return on plan assets	(262)	90
Benefits paid	(82)	(81)
Transfers		(4)
Plan assets at measurement date	1,271	1,610	1,605
Funded status of plan	216	218
Pension Plan | Qualified Plan | Duke Energy Ohio
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	450	502
Service cost	4	5	5
Interest cost	13	13	15
Actuarial gain	(84)	(10)
Benefits paid	(50)	(50)
Transfers		(10)
Obligation at measurement date	333	450	502
Accumulated Benefit Obligation at measurement date	327	439
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	438	472
Employer contributions	3
Actual return on plan assets	(68)	26
Benefits paid	(50)	(50)
Transfers		(10)
Plan assets at measurement date	323	438	472
Funded status of plan	(10)	(12)
Pension Plan | Qualified Plan | Duke Energy Indiana
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	680	715
Service cost	8	9	9
Interest cost	20	18	22
Actuarial gain	(143)	(10)
Benefits paid	(66)	(52)
Obligation at measurement date	499	680	715
Accumulated Benefit Obligation at measurement date	495	672
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	669	684
Employer contributions	5
Actual return on plan assets	(107)	37
Benefits paid	(66)	(52)
Plan assets at measurement date	501	669	684
Funded status of plan	2	(11)
Pension Plan | Qualified Plan | Piedmont
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	273	293
Service cost	5	6	6
Interest cost	8	7	9
Actuarial gain	(47)	(5)
Benefits paid	(69)	(28)
Obligation at measurement date	170	273	293
Accumulated Benefit Obligation at measurement date		274
Accumulated Benefit Obligation at measurement date	170
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	334	343
Employer contributions	2
Actual return on plan assets	(64)	19
Benefits paid	(69)	(28)
Plan assets at measurement date	203	334	343
Funded status of plan	33	61
Other Post-Retirement Benefit Plans
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	625	709
Service cost	3	4	4
Interest cost	17	18	23
Plan participants' contributions	11	14
Actuarial gain	(80)	(47)
Plan amendments	(71)
Benefits paid	(68)	(73)
Obligation at measurement date	437	625	709
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	211	237
Employer contributions	39
Actual return on plan assets	(31)	15
Benefits paid	(68)	(73)
Plan participants' contributions	11	14
Employer contributions		18
Plan assets at measurement date	162	211	237
Funded status of plan	(275)	(414)
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	149	174
Service cost	1	1	1
Interest cost	4	4	5
Plan participants' contributions	2	3
Actuarial gain	(17)	(14)
Plan amendments	(11)
Benefits paid	(16)	(19)
Obligation at measurement date	112	149	174
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	135	139
Employer contributions	3
Actual return on plan assets	(19)	9
Benefits paid	(16)	(19)
Plan participants' contributions	2	3
Employer contributions		3
Plan assets at measurement date	105	135	139
Funded status of plan	(7)	(14)
Other Post-Retirement Benefit Plans | Progress Energy
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	263	299
Service cost		1	1
Interest cost	7	7	10
Plan participants' contributions	4	5
Actuarial gain	(43)	(20)
Plan amendments	(37)
Benefits paid	(26)	(29)
Obligation at measurement date	168	263	299
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	(1)	(1)
Employer contributions	23
Benefits paid	(26)	(29)
Plan participants' contributions	4	5
Employer contributions		24
Plan assets at measurement date		(1)	(1)
Funded status of plan	(168)	(264)
Other Post-Retirement Benefit Plans | Duke Energy Progress
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	147	166
Interest cost	4	4	5
Plan participants' contributions	2	3
Actuarial gain	(27)	(10)
Plan amendments	(18)
Benefits paid	(13)	(16)
Obligation at measurement date	95	147	166
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	(2)	(2)
Employer contributions	11
Benefits paid	(13)	(16)
Plan participants' contributions	2	3
Employer contributions		13
Plan assets at measurement date	(2)	(2)	(2)
Funded status of plan	(97)	(149)
Other Post-Retirement Benefit Plans | Duke Energy Florida
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	112	130
Interest cost	3	3	4
Plan participants' contributions	2	2
Actuarial gain	(16)	(10)
Plan amendments	(19)
Benefits paid	(13)	(13)
Obligation at measurement date	69	112	130
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	(2)	(1)
Employer contributions	11
Benefits paid	(13)	(13)
Plan participants' contributions	2	2
Employer contributions		10
Plan assets at measurement date	(2)	(2)	(1)
Funded status of plan	(71)	(114)
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	25	27
Interest cost	1	1	1
Plan participants' contributions	1	1
Actuarial gain	(3)	(1)
Benefits paid	(4)	(3)
Obligation at measurement date	20	25	27
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	9	9
Employer contributions	3
Actual return on plan assets	(2)	1
Benefits paid	(4)	(3)
Plan participants' contributions	1	1
Employer contributions		1
Plan assets at measurement date	7	9	9
Funded status of plan	(13)	(16)
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	54	61
Service cost		1	1
Interest cost	1	1	2
Plan participants' contributions	1	2
Actuarial gain	(1)	(2)
Plan amendments	(17)
Benefits paid	(8)	(9)
Obligation at measurement date	30	54	61
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	6	7
Employer contributions	4
Benefits paid	(8)	(9)
Plan participants' contributions	1	2
Employer contributions		6
Plan assets at measurement date	3	6	7
Funded status of plan	(27)	(48)
Other Post-Retirement Benefit Plans | Piedmont
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	27	30
Interest cost	1	1	1
Actuarial gain	(5)	(2)
Benefits paid	(2)	(2)
Obligation at measurement date	21	27	30
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	39	37
Employer contributions	1
Actual return on plan assets	(7)	3
Benefits paid	(2)	(2)
Employer contributions		1
Plan assets at measurement date	31	39	$ 37
Funded status of plan	$ 10	$ 12

Employee Benefit Plans (Amoun_2

Employee Benefit Plans (Amounts Recognized in Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	$ 832	$ 855
Regulatory assets	18,130	14,637
Regulatory liabilities	15,048	17,363
Duke Energy Carolinas
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	38	50
Regulatory assets	5,388	3,479
Regulatory liabilities	6,313	7,685
Progress Energy
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	292	417
Regulatory assets	8,979	6,939
Regulatory liabilities	5,329	6,044
Duke Energy Progress
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	160	221
Regulatory assets	5,414	4,651
Regulatory liabilities	4,452	5,249
Duke Energy Florida
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	111	166
Regulatory assets	3,565	2,288
Regulatory liabilities	877	796
Duke Energy Ohio
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	90	109
Regulatory assets	684	707
Regulatory liabilities	633	801
Duke Energy Indiana
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	122	167
Regulatory assets	1,124	1,555
Regulatory liabilities	1,641	1,692
Piedmont
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	7	7
Regulatory assets	511	457
Regulatory liabilities	1,098	1,114
Pension Plan | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	885	1,071
Noncurrent pension liability	250	43
Net amount recognized	(635)	(1,028)
Regulatory assets	2,016	1,649
Accumulated other comprehensive (income) loss
Deferred income tax asset	(27)	(20)
Prior service credit	(1)	(1)
Net actuarial loss (gain)	129	92
Net amount recognized in accumulated other comprehensive income (loss)	101	71
Pension Plan | Duke Energy Carolinas | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	261	462
Net amount recognized	(261)	(462)
Regulatory assets	545	324
Pension Plan | Progress Energy | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	396	494
Noncurrent pension liability		1
Net amount recognized	(396)	(493)
Regulatory assets	670	563
Accumulated other comprehensive (income) loss
Deferred income tax asset	(1)
Net actuarial loss (gain)	3	1
Net amount recognized in accumulated other comprehensive income (loss)	2	1
Pension Plan | Duke Energy Progress | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	174	268
Net amount recognized	(174)	(268)
Regulatory assets	353	252
Pension Plan | Duke Energy Florida | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	216	219
Noncurrent pension liability		1
Net amount recognized	(216)	(218)
Regulatory assets	316	311
Pension Plan | Duke Energy Ohio | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	62	74
Noncurrent pension liability	72	86
Net amount recognized	10	12
Regulatory assets	92	93
Pension Plan | Duke Energy Indiana | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	90	100
Noncurrent pension liability	88	111
Net amount recognized	(2)	11
Regulatory assets	178	190
Pension Plan | Piedmont | Qualified Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	33	61
Net amount recognized	(33)	(61)
Regulatory assets	84	75
Other Post-Retirement Benefit Plans
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension		12
Current pension liability	9	9
Noncurrent pension liability	266	417
Net amount recognized	275	414
Regulatory assets	50	129
Regulatory liabilities	189	162
Accumulated other comprehensive (income) loss
Deferred income tax liability	3	3
Prior service credit	(1)	(1)
Net actuarial loss (gain)	(13)	(14)
Net amount recognized in accumulated other comprehensive income (loss)	(11)	(12)
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	7	14
Net amount recognized	7	14
Regulatory liabilities	44	44
Other Post-Retirement Benefit Plans | Progress Energy
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	5	5
Noncurrent pension liability	163	259
Net amount recognized	168	264
Regulatory assets	46	126
Other Post-Retirement Benefit Plans | Duke Energy Progress
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	3	3
Noncurrent pension liability	94	146
Net amount recognized	97	149
Regulatory assets	34	79
Other Post-Retirement Benefit Plans | Duke Energy Florida
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	2	2
Noncurrent pension liability	69	112
Net amount recognized	71	114
Regulatory assets	11	47
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	1	1
Current pension liability	2	1
Noncurrent pension liability	12	16
Net amount recognized	13	16
Regulatory assets	4	4
Regulatory liabilities	21	21
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	27	48
Net amount recognized	27	48
Regulatory assets	25	28
Regulatory liabilities	82	63
Other Post-Retirement Benefit Plans | Piedmont
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	10	12
Net amount recognized	$ (10)	(12)
Regulatory liabilities		$ 5

Employee Benefit Plans (Informa

Employee Benefit Plans (Information For Plans with Accumulated Benefit Obligation in Excess of Plan Assets) (Details) - Pension Plan - Qualified Plan - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	$ 3,323
Accumulated benefit obligation	3,288
Fair value of plan assets	3,073
Duke Energy Ohio
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	103	$ 153
Accumulated benefit obligation	99	143
Fair value of plan assets	31	67
Duke Energy Indiana
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	198	284
Accumulated benefit obligation	193	275
Fair value of plan assets	$ 110	$ 173

Employee Benefit Plans (Assumpt

Employee Benefit Plans (Assumptions Used For Pension Benefits Accounting) (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | Qualified Plan
Benefit Obligations [Abstract]
Discount rate	5.60%	2.90%	2.60%
Interest crediting rate	4.35%	4%	4%
Net Periodic Benefit Cost [Abstract]
Discount rate		2.60%	3.30%
Interest crediting rate	4%	4%	4%
Expected long-term rate of return on plan assets	6.50%	6.50%	6.85%
Pension Plan | Minimum | Qualified Plan
Benefit Obligations [Abstract]
Salary increase	3.50%	3.50%	3.50%
Net Periodic Benefit Cost [Abstract]
Discount rate	2.90%
Salary increase	3.50%	3.50%	3.50%
Expected long-term rate of return on plan assets
Pension Plan | Maximum | Qualified Plan
Benefit Obligations [Abstract]
Salary increase	4%	4%	4%
Net Periodic Benefit Cost [Abstract]
Discount rate	5.70%
Salary increase	4%	4%	4%
Other Post-Retirement Benefit Plans
Benefit Obligations [Abstract]
Discount rate	5.60%	2.90%	2.60%
Net Periodic Benefit Cost [Abstract]
Discount rate	2.90%	2.60%	3.30%
Expected long-term rate of return on plan assets	6.50%	6.50%	6.85%

Employee Benefit Plans (Assumed

Employee Benefit Plans (Assumed Health Care Cost Trend Rates) (Details)	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next year	6.50%	6.25%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)	4.75%	4.75%

Employee Benefit Plans (Expecte

Employee Benefit Plans (Expected Benefit Payments) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Pension Plan | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	$ 661
2024	635
2025	629
2026	607
2027	592
2028-2032	2,581
Pension Plan | Duke Energy Carolinas | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	186
2024	176
2025	174
2026	164
2027	156
2028-2032	628
Pension Plan | Progress Energy | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	183
2024	180
2025	183
2026	180
2027	177
2028-2032	804
Pension Plan | Duke Energy Progress | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	99
2024	95
2025	97
2026	91
2027	89
2028-2032	372
Pension Plan | Duke Energy Florida | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	83
2024	84
2025	85
2026	87
2027	87
2028-2032	427
Pension Plan | Duke Energy Ohio | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	32
2024	31
2025	31
2026	30
2027	29
2028-2032	135
Pension Plan | Duke Energy Indiana | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	45
2024	45
2025	44
2026	44
2027	43
2028-2032	205
Pension Plan | Piedmont | Qualified Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	19
2024	18
2025	16
2026	16
2027	15
2028-2032	71
Other Post-Retirement Benefit Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	68
2024	49
2025	45
2026	41
2027	38
2028-2032	158
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	16
2024	13
2025	12
2026	11
2027	10
2028-2032	41
Other Post-Retirement Benefit Plans | Progress Energy
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	25
2024	18
2025	16
2026	15
2027	14
2028-2032	61
Other Post-Retirement Benefit Plans | Duke Energy Progress
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	14
2024	10
2025	9
2026	9
2027	8
2028-2032	36
Other Post-Retirement Benefit Plans | Duke Energy Florida
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	11
2024	7
2025	7
2026	6
2027	6
2028-2032	25
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	3
2024	3
2025	2
2026	2
2027	2
2028-2032	8
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	7
2024	4
2025	3
2026	3
2027	3
2028-2032	9
Other Post-Retirement Benefit Plans | Piedmont
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2023	2
2024	2
2025	2
2026	2
2027	2
2028-2032	$ 9

Employee Benefit Plans (Target

Employee Benefit Plans (Target and Actual Asset Allocations) (Details)	Dec. 31, 2022	Dec. 31, 2021
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100%
Actual asset allocation	100%	100%
Master Trust | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100%
Actual asset allocation	100%	100%
Master Trust | Global equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	45%
Actual asset allocation	49%	24%
Master Trust | Global equity securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	14%
Actual asset allocation	14%	24%
Master Trust | Global private equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	2%
Actual asset allocation	2%	1%
Master Trust | Global private equity securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	1%
Actual asset allocation		1%
Master Trust | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	35%
Actual asset allocation	30%	62%
Master Trust | Debt securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	80%
Actual asset allocation	80%	62%
Master Trust | Return seeking debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	7%
Actual asset allocation	7%	4%
Master Trust | Return seeking debt securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	2%
Actual asset allocation	2%	4%
Master Trust | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation	4%
Actual asset allocation	6%	3%
Master Trust | Hedge funds | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	1%
Actual asset allocation	2%	3%
Master Trust | Real estate and cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation	7%
Actual asset allocation	6%	6%
Master Trust | Real estate and cash | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	2%
Actual asset allocation	2%	6%
OPEB
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100%
Actual asset allocation	100%	100%
OPEB | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	30%
Actual asset allocation	12%	19%
OPEB | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	5%
Actual asset allocation	5%	5%
OPEB | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	45%
Actual asset allocation	11%	18%
OPEB | Real estate
Defined Benefit Plan Disclosure [Line Items]
Target allocation	1%
Actual asset allocation	3%	3%
OPEB | Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation	19%
Actual asset allocation	69%	55%

Employee Benefit Plans (Fair Va

Employee Benefit Plans (Fair Value Measurements of Plan Assets - Master Retirement Trust) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 62	$ 95
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Total assets	7,073	9,352
Master Trust | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	2,065	2,975
Master Trust | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	4,711	6,038
Master Trust | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total assets	62	95
Master Trust | Not Categorized
Defined Benefit Plan Disclosure [Line Items]
Total assets	235	244
Master Trust | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	2,234	2,575
Master Trust | Equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	2,014	2,547
Master Trust | Equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	194
Master Trust | Equity securities | Not Categorized
Defined Benefit Plan Disclosure [Line Items]
Total assets	26	28
Master Trust | Corporate debt securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	2,944	4,189
Master Trust | Corporate debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	2,944	4,189
Master Trust | Short-term investment funds
Defined Benefit Plan Disclosure [Line Items]
Total assets	193	382
Master Trust | Short-term investment funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	1	272
Master Trust | Short-term investment funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	192	110
Master Trust | Partnership interests
Defined Benefit Plan Disclosure [Line Items]
Total assets	62	95
Master Trust | Partnership interests | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total assets	62	95
Master Trust | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Total assets	209	216
Master Trust | Hedge funds | Not Categorized
Defined Benefit Plan Disclosure [Line Items]
Total assets	209	216
Master Trust | U.S. government bonds
Defined Benefit Plan Disclosure [Line Items]
Total assets	1,254	1,618
Master Trust | U.S. government bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	1,254	1,618
Master Trust | Governments bonds – foreign
Defined Benefit Plan Disclosure [Line Items]
Total assets	112	78
Master Trust | Governments bonds – foreign | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	112	78
Master Trust | Cash
Defined Benefit Plan Disclosure [Line Items]
Total assets	45	144
Master Trust | Cash | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	45	144
Master Trust | Government and commercial mortgage backed securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	6	2
Master Trust | Government and commercial mortgage backed securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	6	2
Master Trust | Net pending transactions and other investments
Defined Benefit Plan Disclosure [Line Items]
Total assets	14	53
Master Trust | Net pending transactions and other investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	5	12
Master Trust | Net pending transactions and other investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	9	41
OPEB
Defined Benefit Plan Disclosure [Line Items]
Total assets	33	45
OPEB | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	33	45
OPEB | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	12	18
OPEB | Equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	12	18
OPEB | Real estate
Defined Benefit Plan Disclosure [Line Items]
Total assets	2	2
OPEB | Real estate | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	2	2
OPEB | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total assets	11	14
OPEB | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	11	14
OPEB | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	8	11
OPEB | Debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 8	$ 11
Duke Energy Carolinas | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	27%	26%
Progress Energy | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	33%	32%
Duke Energy Progress | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	15%	15%
Duke Energy Florida | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	18%	17%
Duke Energy Ohio | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	5%	5%
Duke Energy Indiana | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	7%	7%
Piedmont | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Allocated assets (as a percent)	3%	4%

Employee Benefit Plans (Reconci

Employee Benefit Plans (Reconciliation of Assets Measured at Fair Value on a Recurring Basis) (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at prior measurement date	$ 95
Sales	(18)
Total gains and other, net	(8)
Transfer of Level 3 assets from other classifications	(7)	$ 95
Plan assets at measurement date	$ 62	$ 95

Employee Benefit Plans (Employe

Employee Benefit Plans (Employee Savings Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Matching contribution percentage	100%
Eligible pay percentage	6%
Additional contribution percentage for employees not participating in defined pension plans	4%
Employer contributions	$ 246	$ 229	$ 213
Vesting period (in years)	3 years
Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 76	70	67
Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	65	60	57
Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	43	39	38
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	22	21	19
Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	6	5	5
Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	12	12	11
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 13	$ 11	$ 13
Minimum | Piedmont
Defined Benefit Plan Disclosure [Line Items]
Additional contribution percentage for employees not participating in defined pension plans	3%
Maximum | Piedmont
Defined Benefit Plan Disclosure [Line Items]
Additional contribution percentage for employees not participating in defined pension plans	5%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Line Items]
Refund of AMT credit carryforwards			$ 572
Deferred tax liabilities	$ 117
State
Income Tax Disclosure [Line Items]
Reduction in deferred tax liability	490
Reduction of deferred tax assets	$ 25
AMT credit carryforwards
Income Tax Disclosure [Line Items]
Refund of AMT credit carryforwards		$ 572
Income tax interest income		$ 19

Income Taxes (Components of Inc

Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current income taxes
Federal	$ 1	$ (2)	$ (281)
State	(8)	1	(3)
Foreign	4	2	1
Total current income taxes	(3)	1	(283)
Deferred income taxes
Federal	328	275	222
State	(14)		(98)
Total deferred income taxes	314	275	124
ITC amortization	(11)	(8)	(10)
Income tax expense from continuing operations	300	268	(169)
Tax benefit from discontinued operations	(503)	(76)	(65)
Total income tax (benefit) expense included in Consolidated Statements of Operations	(203)	192	(234)
Net operating loss carry forward	550	250	189
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Domestic	3,991	3,947	907
Foreign	87	44	13
Income from continuing operations before income taxes	4,078	3,991	920
Duke Energy Carolinas
Current income taxes
Federal	(71)	241	314
State	(13)	23	35
Total current income taxes	(84)	264	349
Deferred income taxes
Federal	230	(130)	(171)
State	(16)	(79)	(86)
Total deferred income taxes	214	(209)	(257)
ITC amortization	(4)	(4)	(4)
Income tax expense from continuing operations	126	51	88
Total income tax (benefit) expense included in Consolidated Statements of Operations	126	51	88
Net operating loss carry forward	97	32	20
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,726	1,387	1,044
Progress Energy
Current income taxes
Federal	(13)	(15)	280
State	(3)	(4)	29
Total current income taxes	(16)	(19)	309
Deferred income taxes
Federal	310	203	(167)
State	59	47	(24)
Total deferred income taxes	369	250	(191)
ITC amortization	(5)	(4)	(5)
Income tax expense from continuing operations	348	227	113
Total income tax (benefit) expense included in Consolidated Statements of Operations	348	227	113
Net operating loss carry forward	128	95	39
Duke Energy Progress
Current income taxes
Federal	37	113	181
State		8	17
Total current income taxes	37	121	198
Deferred income taxes
Federal	118	(16)	(180)
State	7	(26)	(49)
Total deferred income taxes	125	(42)	(229)
ITC amortization	(4)	(4)	(5)
Income tax expense from continuing operations	158	75	(36)
Total income tax (benefit) expense included in Consolidated Statements of Operations	158	75	(36)
Net operating loss carry forward	9	14	3
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,166	1,066	379
Duke Energy Florida
Current income taxes
Federal	(37)	(75)	148
State	(23)	(17)	24
Total current income taxes	(60)	(92)	172
Deferred income taxes
Federal	201	202	1
State	84	77	25
Total deferred income taxes	285	279	26
Income tax expense from continuing operations	225	187	198
Total income tax (benefit) expense included in Consolidated Statements of Operations	225	187	198
Net operating loss carry forward	111	64	30
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,134	925	969
Duke Energy Ohio
Current income taxes
Federal	(2)	(8)	10
State	1	(2)	1
Total current income taxes	(1)	(10)	11
Deferred income taxes
Federal	(22)	35	30
State	3	5	2
Total deferred income taxes	(19)	40	32
ITC amortization	(1)
Income tax expense from continuing operations	(21)	30	43
Total income tax (benefit) expense included in Consolidated Statements of Operations	(21)	30	43
Net operating loss carry forward	7	2
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	281	234	295
Duke Energy Indiana
Current income taxes
Federal	38	65	48
State	2	7	7
Total current income taxes	40	72	55
Deferred income taxes
Federal	(63)	19	12
State		16	17
Total deferred income taxes	(63)	35	29
ITC amortization	(1)
Income tax expense from continuing operations	(24)	107	84
Total income tax (benefit) expense included in Consolidated Statements of Operations	(24)	107	84
Net operating loss carry forward	13	8	8
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	113	588	492
Piedmont
Current income taxes
Federal	32	23	(27)
State	2	3	(8)
Total current income taxes	34	26	(35)
Deferred income taxes
Federal	12	17	60
State	(7)	(13)	(7)
Total deferred income taxes	5	4	53
Income tax expense from continuing operations	39	30	18
Total income tax (benefit) expense included in Consolidated Statements of Operations	39	30	18
Net operating loss carry forward	12	3	11
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	$ 362	$ 340	$ 291

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rates) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 856	$ 838	$ 193
State income tax, net of federal income tax effect		(17)	1	(80)
Amortization of excess deferred income tax		(481)	(438)	(276)
AFUDC equity income		(41)	(34)	(48)
AFUDC equity depreciation		36	35	103
Other tax credits		(43)	(30)	(37)
Tax true up				(12)
Valuation allowance	$ (85)		(85)
Other items, net		(10)	(19)	(12)
Income tax expense from continuing operations		$ 300	$ 268	$ (169)
Effective tax rate		7.40%	6.70%	(18.40%)
Federal capital gain	$ 426
Duke Energy Carolinas
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 362	$ 291	$ 219
State income tax, net of federal income tax effect		(23)	(44)	(40)
Amortization of excess deferred income tax		(195)	(184)	(82)
AFUDC equity income		(20)	(14)	(13)
AFUDC equity depreciation		18	18	19
Other tax credits		(12)	(12)	(13)
Tax true up				(3)
Other items, net		(4)	(4)	1
Income tax expense from continuing operations		$ 126	$ 51	$ 88
Effective tax rate		7.30%	3.70%	8.40%
Progress Energy
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 457	$ 384	$ 243
State income tax, net of federal income tax effect		44	34	4
Amortization of excess deferred income tax		(133)	(174)	(118)
AFUDC equity income		(14)	(11)	(9)
AFUDC equity depreciation		12	10	10
Other tax credits		(16)	(11)	(16)
Tax true up				1
Other items, net		(2)	(5)	(2)
Income tax expense from continuing operations		$ 348	$ 227	$ 113
Effective tax rate		16%	12.40%	9.70%
Duke Energy Progress
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 245	$ 224	$ 80
State income tax, net of federal income tax effect		6	(14)	(25)
Amortization of excess deferred income tax		(74)	(120)	(68)
AFUDC equity income		(11)	(7)	(6)
AFUDC equity depreciation		6	5	5
Other tax credits		(9)	(8)	(14)
Tax true up				(5)
Other items, net		(5)	(5)	(3)
Income tax expense from continuing operations		$ 158	$ 75	$ (36)
Effective tax rate		13.60%	7%	(9.50%)
Duke Energy Florida
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 238	$ 194	$ 204
State income tax, net of federal income tax effect		48	47	39
Amortization of excess deferred income tax		(59)	(54)	(49)
AFUDC equity income		(3)	(3)	(3)
AFUDC equity depreciation		6	5	5
Other tax credits		(7)	(3)	(2)
Tax true up				5
Other items, net		2	1	(1)
Income tax expense from continuing operations		$ 225	$ 187	$ 198
Effective tax rate		19.80%	20.20%	20.40%
Duke Energy Ohio
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 59	$ 49	$ 62
State income tax, net of federal income tax effect		3	2	2
Amortization of excess deferred income tax		(79)	(22)	(20)
AFUDC equity income		(1)	(2)	(2)
AFUDC equity depreciation		1	2	1
Other tax credits		(2)	(1)	(1)
Other items, net		(2)	2	1
Income tax expense from continuing operations		$ (21)	$ 30	$ 43
Effective tax rate		(7.50%)	12.80%	14.60%
Duke Energy Indiana
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 24	$ 123	$ 103
State income tax, net of federal income tax effect		2	18	19
Amortization of excess deferred income tax		(48)	(34)	(36)
AFUDC equity income		(2)	(4)	(4)
AFUDC equity depreciation		4	5	4
Other tax credits		(3)	(2)	(3)
Tax true up				(1)
Other items, net		(1)	1	2
Income tax expense from continuing operations		$ (24)	$ 107	$ 84
Effective tax rate		(21.20%)	18.20%	17.10%
Piedmont
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%		$ 76	$ 71	$ 61
State income tax, net of federal income tax effect		(4)	(8)	(12)
Amortization of excess deferred income tax		(23)	(25)	(21)
AFUDC equity income		(2)	(4)	(10)
Other tax credits		(8)	(4)	(2)
Tax true up				1
Other items, net				1
Income tax expense from continuing operations		$ 39	$ 30	$ 18
Effective tax rate		10.80%	8.80%	6.20%

Income Taxes (Deferred Income T

Income Taxes (Deferred Income Taxes) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	$ 348	$ 347
Lease obligations	405	346
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	192	207
Progress Energy merger purchase accounting adjustments	301	340
Tax credits and NOL carryforwards	4,426	3,784
Other	106	85
Valuation allowance	(519)	(518)
Total deferred income tax assets	5,259	4,591
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(1,671)	(2,428)
Accelerated depreciation rates	(11,478)	(10,391)
Regulatory assets and deferred debits, net	(2,074)	(1,151)
Total deferred income tax liabilities	(15,223)	(13,970)
Net deferred income tax liabilities	(9,964)	(9,379)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	4,426	3,784
Valuation allowance	519	518
General Business Credits
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	2,473
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	2,473
NOL Carryforwards | Federal
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	306
Valuation allowance	(4)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	306
Valuation allowance	4
NOL Carryforwards | State
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	394
Valuation allowance	(109)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	394
Valuation allowance	109
NOL Carryforwards | Foreign
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	12
Valuation allowance	(12)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	12
Valuation allowance	12
Charitable contribution carryforwards
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	18
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	18
Foreign Tax Credit
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(391)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	391
Foreign Tax Credit | Foreign
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	1,223
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	1,223
Duke Energy Carolinas
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	170	121
Lease obligations	89	91
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	(1)	(36)
Tax credits and NOL carryforwards	444	349
Regulatory liabilities and deferred credits		11
Other	18	12
Total deferred income tax assets	720	548
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(983)	(1,205)
Accelerated depreciation rates	(3,410)	(2,977)
Regulatory assets and deferred debits, net	(480)
Total deferred income tax liabilities	(4,873)	(4,182)
Net deferred income tax liabilities	(4,153)	(3,634)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	444	349
Progress Energy
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	117	101
Lease obligations	263	197
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	12	30
Tax credits and NOL carryforwards	618	497
Other	22	12
Total deferred income tax assets	1,032	837
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(521)	(742)
Accelerated depreciation rates	(4,358)	(3,891)
Regulatory assets and deferred debits, net	(1,300)	(768)
Total deferred income tax liabilities	(6,179)	(5,401)
Net deferred income tax liabilities	(5,147)	(4,564)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	618	497
Duke Energy Progress
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	33	60
Lease obligations	197	121
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	18	17
Tax credits and NOL carryforwards	167	160
Other	12	7
Total deferred income tax assets	427	365
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(432)	(610)
Accelerated depreciation rates	(1,844)	(1,546)
Regulatory assets and deferred debits, net	(628)	(417)
Total deferred income tax liabilities	(2,904)	(2,573)
Net deferred income tax liabilities	(2,477)	(2,208)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	167	160
Duke Energy Florida
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	83	40
Lease obligations	65	76
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	(10)	7
Tax credits and NOL carryforwards	412	306
Other	10	4
Total deferred income tax assets	560	433
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(102)	(135)
Accelerated depreciation rates	(2,576)	(2,382)
Regulatory assets and deferred debits, net	(671)	(350)
Total deferred income tax liabilities	(3,349)	(2,867)
Net deferred income tax liabilities	(2,789)	(2,434)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	412	306
Duke Energy Ohio
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	12	19
Lease obligations	4	4
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	9	11
Tax credits and NOL carryforwards	20	13
Regulatory liabilities and deferred credits	3	16
Investments and other assets	3	5
Other	5	7
Total deferred income tax assets	56	75
Deferred Tax Liabilities, Gross [Abstract]
Accelerated depreciation rates	(1,192)	(1,125)
Total deferred income tax liabilities	(1,192)	(1,125)
Net deferred income tax liabilities	(1,136)	(1,050)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	20	13
Duke Energy Indiana
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	23	7
Lease obligations	15	16
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	10	20
Tax credits and NOL carryforwards	208	195
Regulatory liabilities and deferred credits	61
Investments and other assets		6
Other	2	2
Total deferred income tax assets	319	246
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(12)
Accelerated depreciation rates	(1,606)	(1,496)
Regulatory assets and deferred debits, net		(53)
Total deferred income tax liabilities	(1,618)	(1,549)
Net deferred income tax liabilities	(1,299)	(1,303)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	208	195
Piedmont
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	24	18
Lease obligations	3	4
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	(2)	(8)
Tax credits and NOL carryforwards	37	29
Regulatory liabilities and deferred credits		6
Other	9	8
Total deferred income tax assets	71	57
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(28)	(39)
Accelerated depreciation rates	(892)	(833)
Regulatory assets and deferred debits, net	(21)
Total deferred income tax liabilities	(941)	(872)
Net deferred income tax liabilities	(870)	(815)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	$ 37	$ 29

Income Taxes (Other Disclosures

Income Taxes (Other Disclosures) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		$ 51	$ 125	$ 126
Gross decreases – tax positions in prior periods(a)			(86)	(2)
Gross increases – current period tax positions		14	12	4
Reduction due to lapse of statute of limitations				(3)
Total changes		14	(74)	(1)
Unrecognized tax benefits – December 31	$ 51	65	51	125
Amount that if recognized, would affect the effective tax rate or regulatory liability		59
Federal capital gain	426
Duke Energy Carolinas
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		13	10	8
Gross increases – current period tax positions		4	3	2
Total changes		4	3	2
Unrecognized tax benefits – December 31	13	17	13	10
Amount that if recognized, would affect the effective tax rate or regulatory liability		17
Progress Energy
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		15	10	9
Gross increases – current period tax positions		4	5	1
Total changes		4	5	1
Unrecognized tax benefits – December 31	15	19	15	10
Amount that if recognized, would affect the effective tax rate or regulatory liability		18
Duke Energy Progress
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		10	6	6
Gross increases – current period tax positions		3	4
Total changes		3	4
Unrecognized tax benefits – December 31	10	13	10	6
Amount that if recognized, would affect the effective tax rate or regulatory liability		13
Duke Energy Florida
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		4	3	3
Gross increases – current period tax positions		1	1
Total changes		1	1
Unrecognized tax benefits – December 31	4	5	4	3
Amount that if recognized, would affect the effective tax rate or regulatory liability		5
Duke Energy Ohio
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		1	1	1
Unrecognized tax benefits – December 31	1	1	1	1
Amount that if recognized, would affect the effective tax rate or regulatory liability		1
Duke Energy Indiana
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		2	1	1
Gross increases – current period tax positions			1
Total changes			1
Unrecognized tax benefits – December 31	2	2	2	1
Amount that if recognized, would affect the effective tax rate or regulatory liability		2
Piedmont
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits – January 1		4	1	4
Gross increases – current period tax positions		5	3
Reduction due to lapse of statute of limitations				(3)
Total changes		5	3	(3)
Unrecognized tax benefits – December 31	$ 4	9	$ 4	$ 1
Amount that if recognized, would affect the effective tax rate or regulatory liability		$ 8

Other Income and Expenses, Ne_2

Other Income and Expenses, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	$ 27	$ 13	$ 30
AFUDC equity	197	171	154
Post in-service equity returns	34	39	27
Nonoperating income, other	134	413	240
Other income and expense, net	392	636	451
Duke Energy Carolinas
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	2	4	4
AFUDC equity	98	65	62
Post in-service equity returns	14	21	17
Nonoperating income, other	107	180	94
Other income and expense, net	221	270	177
Progress Energy
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	24	8	8
AFUDC equity	68	51	42
Post in-service equity returns	18	16	8
Nonoperating income, other	71	140	71
Other income and expense, net	181	215	129
Duke Energy Progress
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	4	6	2
AFUDC equity	52	34	29
Post in-service equity returns	18	16	8
Nonoperating income, other	40	87	36
Other income and expense, net	114	143	75
Duke Energy Florida
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	20	2	6
AFUDC equity	16	16	12
Nonoperating income, other	38	53	35
Other income and expense, net	74	71	53
Duke Energy Ohio
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	11	4	4
AFUDC equity	7	7	7
Post in-service equity returns	1	1	1
Nonoperating income, other		6	4
Other income and expense, net	19	18	16
Duke Energy Indiana
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	15	6	6
AFUDC equity	13	27	23
Post in-service equity returns	1	1	1
Nonoperating income, other	7	8	7
Other income and expense, net	36	42	37
Piedmont
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	19	19	17
AFUDC equity	11	20	19
Nonoperating income, other	16	16	15
Other income and expense, net	$ 46	$ 55	$ 51

Quarterly Financial Data (Una_3

Quarterly Financial Data (Unaudited) (Schedule of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Operating revenues	$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	$ 28,768	$ 24,621	$ 23,366
Operating income (loss)	1,194	2,056	1,448	1,314	1,110	1,726	1,198	1,466	6,012	5,500	4,571
Income (loss) from continuing operations	635	1,410	898	835	700	1,333	723	967	3,778	3,723	1,089
(Loss) Income from discontinued operations, net of tax	(1,293)	3	(18)	(15)	(36)	(57)	(25)	(26)	(1,323)	(144)	(7)
Net income (loss)	(658)	1,413	880	820	664	1,276	698	941	2,455	3,579	1,082
Net Income available to Duke Energy common stockholders	$ (650)	$ 1,383	$ 893	$ 818	$ 732	$ 1,366	$ 751	$ 953	$ 2,444	$ 3,802	$ 1,270
Income (loss) from continuing operations attributable to Duke Energy Corporation common shareholders [Abstract]
Basic (usd per share)	$ 0.80	$ 1.78	$ 1.11	$ 1.06	$ 0.86	$ 1.69	$ 0.90	$ 1.22	$ 4.74	$ 4.68	$ 1.33
Diluted (usd per share)	0.80	1.78	1.11	1.06	0.86	1.69	0.90	1.22	4.74	4.68	1.33
Income (loss) from discontinued operations attributable to Duke Energy Corporation common shareholders [Abstract]
Basic (usd per share)	(1.66)	0.03	0.03	0.02	0.07	0.10	0.06	0.03	(1.57)	0.26	0.39
Diluted (usd per share)	(1.66)	0.03	0.03	0.02	0.07	0.10	0.06	0.03	(1.57)	0.26	0.39
Net income available to Duke Energy Corporation common stockholders
Basic (usd per share)	(0.86)	1.81	1.14	1.08	0.93	1.79	0.96	1.25	3.17	4.94	1.72
Diluted (usd per share)	$ (0.86)	$ 1.81	$ 1.14	$ 1.08	$ 0.93	$ 1.79	$ 0.96	$ 1.25	$ 3.17	$ 4.94	$ 1.72

Quarterly Financial Data (Una_4

Quarterly Financial Data (Unaudited) (Unusual or Infrequently Occurring Items) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Impairment charges	$ (434)	$ (353)	$ (978)
Severance Costs	$ (65)	$ (69)	$ 85