Duke Energy Florida 10-Q 2 Nov 23 2023 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Oct. 31, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		770,711,728
Entity Central Index Key	0001326160
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Duke Energy Carolinas
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000030371
Current Fiscal Year End Date	--12-31
Progress Energy
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		100
Entity Central Index Key	0001094093
Current Fiscal Year End Date	--12-31
Duke Energy Progress
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000017797
Current Fiscal Year End Date	--12-31
Duke Energy Florida
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000037637
Current Fiscal Year End Date	--12-31
Duke Energy Ohio
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		89,663,086
Entity Central Index Key	0000020290
Current Fiscal Year End Date	--12-31
Duke Energy Indiana
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000081020
Current Fiscal Year End Date	--12-31
Piedmont
Entity 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		100
Entity Central Index Key	0000078460
Current Fiscal Year End Date	--12-31
Common Stock
Entity 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
Entity Information [Line Items]
Title of 12(b) Security	5.625% Junior Subordinated Debentures
Trading Symbol	DUKB
Security Exchange Name	NYSE
Depositary Share
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares
Trading Symbol	DUK PR A
Security Exchange Name	NYSE
Senior Notes 3.10% Due 2028
Entity Information [Line Items]
Title of 12(b) Security	3.10% Senior Notes
Trading Symbol	DUK 28A
Security Exchange Name	NYSE
Senior Notes 3.85% Due 2034
Entity Information [Line Items]
Title of 12(b) Security	3.85% Senior Notes
Trading Symbol	DUK 34
Security Exchange Name	NYSE

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Revenues
Regulated electric	$ 7,640	$ 7,373	$ 20,140	$ 19,381
Regulated natural gas	284	397	1,497	1,824
Nonregulated electric and other	70	72	211	212
Total operating revenues	7,994	7,842	21,848	21,417
Operating Expenses
Operation, maintenance and other	1,428	1,308	4,113	4,223
Depreciation and amortization	1,353	1,299	3,913	3,793
Property and other taxes	394	368	1,136	1,118
Impairment of assets and other charges	88	(4)	96	202
Total operating expenses	5,891	5,792	16,679	16,616
Gains on Sales of Other Assets and Other, net	8	6	46	17
Operating Income	2,111	2,056	5,215	4,818
Other Income and Expenses
Equity in earnings of unconsolidated affiliates	45	28	85	92
Other income and expenses, net	133	87	431	290
Total other income and expenses	178	115	516	382
Interest Expense	774	603	2,221	1,760
Income From Continuing Operations Before Income Taxes	1,515	1,568	3,510	3,440
Income Tax Expense From Continuing Operations	42	158	316	297
Income From Continuing Operations	1,473	1,410	3,194	3,143
(Loss) Income From Discontinued Operations, net of tax	(152)	3	(1,316)	(30)
Net Income	1,321	1,413	1,878	3,113
Add: Net (Income) Loss Attributable to Noncontrolling Interests	(69)	9	(42)	73
Net Income Attributable to Duke Energy Corporation	1,252	1,422	1,836	3,186
Less: Preferred Dividends	39	39	92	92
Net Income Available to Duke Energy Corporation Common Stockholders	$ 1,213	$ 1,383	$ 1,744	$ 3,094
Income from continuing operations available to Duke Energy Corporation common stockholders
Basic (in usd per share)	$ 1.83	$ 1.78	$ 3.94	$ 3.95
Diluted (in usd per share)	1.83	1.78	3.94	3.95
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders
Basic (in usd per share)		0.03		0.08
Diluted (in usd per share)		0.03		0.08
Net income available to Duke Energy Corporation common stockholders
Basic (in usd per share)	1.59	1.81	2.27	4.03
Diluted (in usd per share)	$ 1.59	$ 1.81	$ 2.27	$ 4.03
Weighted Average Shares Outstanding
Basic (in shares)	771	770	771	770
Diluted (in shares)	771	770	771	770
Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales	$ 2,571	$ 2,632	$ 6,987	$ 6,421
Cost of natural gas
Operating Expenses
Cost of sales	$ 57	$ 189	$ 434	$ 859

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income		$ 1,321		$ 1,413	$ 1,878		$ 3,113
Other Comprehensive Income (Loss), net of tax
Pension and OPEB adjustments	[1]	(1)		(7)	(1)		(3)
Net unrealized gains on cash flow hedges	[1]	200		14	206		276
Reclassification into earnings from cash flow hedges	[1]	24			28		9
Net unrealized gains (losses) on fair value hedges	[1]	15		(8)	30		(20)
Unrealized (losses) gains on available-for-sale securities	[1]	(6)		1	(2)		(20)
Other Comprehensive Income, net of tax		232	[1]	0	261	[1]	242	[1]
Comprehensive Income		1,553		1,413	2,139		3,355
Add: Comprehensive (Income) Loss Attributable to Noncontrolling Interests		(69)		4	(42)		56
Comprehensive Income Attributable to Duke Energy		1,484		1,417	2,097		3,411
Less: Preferred Dividends		39		39	92		92
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 1,445		$ 1,378	$ 2,005		$ 3,319
[1]Net of income tax expense of approximately $69 million for the three months ended September 30, 2023, and approximately $78 million and $72 million for the nine months ended September 30, 2023, and 2022, respectively. All other periods presented include immaterial income tax impacts.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Other comprehensive income, tax expense	$ 69	$ 78	$ 72

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables (net of allowance for doubtful accounts)	831	1,309
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Assets held for sale	440	356
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Facilities to be retired, net	0	9
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,745	14,645
Nuclear decommissioning trust funds	9,245	8,637
Operating lease right-of-use assets, net	1,073	1,042
Investments in equity method unconsolidated affiliates	505	455
Assets held for sale	4,596	5,634
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Notes payable and commercial paper	3,154	3,952
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Liabilities associated with assets held for sale	589	535
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Investment tax credits	856	849
Liabilities associated with assets held for sale	1,634	1,927
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,886	44,862
Retained earnings	2,036	2,637
Accumulated other comprehensive loss	121	(140)
Total Duke Energy Corporation stockholders' equity	49,006	49,322
Noncontrolling interests	2,820	2,531
Total equity	51,826	51,853
Total Liabilities and Equity	181,160	178,086
Preferred stock, Series A
Equity
Preferred stock	973	973
Preferred stock, Series B
Equity
Preferred stock	$ 989	$ 989

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Regulatory assets	3,489	3,485
Current Assets: Other	602	973
Regulatory assets	13,745	14,645
Other	3,698	3,400
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	$ 71,353	$ 65,873
Common stock, par value (in 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)	771,000,000	770,000,000
Preferred stock, Series A
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
Preferred stock, Series B
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
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	$ 154	$ 176
Regulatory assets	109	106
Current Assets: Other	56	116
Regulatory assets	1,668	1,715
Other	43	52
Current maturities of long-term debt	428	350
Long-Term Debt	$ 3,025	$ 3,108

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,878	$ 3,113
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Gains on sales of other assets	(46)	(16)
Impairment of assets and other charges	1,699	202
Deferred income taxes	(29)	209
Equity in earnings of unconsolidated affiliates	(70)	(87)
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	29	33
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
Net Income Attributable to Duke Energy Corporation	1,836	3,186
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Contributions to equity method investments	(30)	(37)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Net proceeds from the sales of other assets	130	0
Other	578	517
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days	575	80
Payments for the redemption of short-term debt with original maturities greater than 90 days	(110)	(287)
Notes payable and commercial paper	(1,404)	476
Contributions from noncontrolling interests	278	132
Dividends paid	(2,438)	(2,389)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	$ 1,528	$ 1,387

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total		Preferred Stock	Total Equity	Common Stock	Additional Paid-in Capital	Retained Earnings	Net Gains (Losses) on Hedges	[1]	Net Unrealized Gains (Losses) on Available-for-Sale Securities	Pension and OPEB Adjustments	Noncontrolling Interests	Common Stock	Common Stock Total Equity	Common Stock Additional Paid-in Capital
Beginning Balance (Attributable to Parent) at Dec. 31, 2021				$ 1,962	$ 49,296	$ 1	$ 44,371	$ 3,265	$ (232)		$ (2)	$ (69)
Beginning Balance (in shares) at Dec. 31, 2021						769
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2021													$ 1,840
Beginning Balance (Parent) at Dec. 31, 2021		$ 51,136
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		3,021			3,094			3,094					(73)
Other comprehensive income (loss)		242	[2]		225				248		(20)	(3)	17
Common stock issuances, including dividend reinvestment and employee benefits (in shares)						1
Common stock issuances, including dividend reinvestment and employee benefits														$ 41	$ 41	$ 41
Common stock dividends		(2,297)			(2,297)			(2,297)
Sale of noncontrolling interest		21			(17)		(17)						38
Contributions from noncontrolling interests, net of transaction costs	[3]	94											94
Distributions to noncontrolling interest in subsidiaries		(92)											(92)
Other		3			3		2	1
Ending Balance (Attributable to Parent) at Sep. 30, 2022				1,962	50,345	$ 1	44,397	4,063	16		(22)	(72)
Beginning Balance (in shares) at Sep. 30, 2022						770
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2022													1,824
Ending Balance (Parent) at Sep. 30, 2022		52,169
Beginning Balance (Attributable to Parent) at Jun. 30, 2022				1,962	49,720	$ 1	44,373	3,457	15		(23)	(65)
Beginning Balance (in shares) at Jun. 30, 2022						770
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2022													1,864
Beginning Balance (Parent) at Jun. 30, 2022		51,584
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,374			1,383			1,383					(9)
Other comprehensive income (loss)		0			(5)				1		1	(7)	5
Common stock issuances, including dividend reinvestment and employee benefits														21	21	21
Common stock dividends		(776)			(776)			(776)
Contributions from noncontrolling interests, net of transaction costs	[3]	6											6
Distributions to noncontrolling interest in subsidiaries		(42)											(42)
Other		2			2		3	(1)
Ending Balance (Attributable to Parent) at Sep. 30, 2022				1,962	50,345	$ 1	44,397	4,063	16		(22)	(72)
Beginning Balance (in shares) at Sep. 30, 2022						770
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2022													1,824
Ending Balance (Parent) at Sep. 30, 2022		52,169
Beginning Balance (Attributable to Parent) at Dec. 31, 2022		$ 49,322		1,962	49,322	$ 1	44,862	2,637	(29)		(23)	(88)
Beginning Balance (in shares) at Dec. 31, 2022		770				770
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022		$ 2,531											2,531
Beginning Balance (Parent) at Dec. 31, 2022		51,853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,786			1,744			1,744					42
Other comprehensive income (loss)		261	[2]		261				264		(2)	(1)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)						1
Common stock issuances, including dividend reinvestment and employee benefits														43	43	43
Common stock dividends		(2,346)			(2,346)			(2,346)
Sale of noncontrolling interest		(3)			(13)		(13)						10
Contributions from noncontrolling interests, net of transaction costs	[3]	278											278
Distributions to noncontrolling interest in subsidiaries		(45)											(45)
Other		(1)			(5)		(6)	1					4
Ending Balance (Attributable to Parent) at Sep. 30, 2023		$ 49,006		1,962	49,006	$ 1	44,886	2,036	235		(25)	(89)
Beginning Balance (in shares) at Sep. 30, 2023		771				771
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023		$ 2,820											2,820
Ending Balance (Parent) at Sep. 30, 2023		51,826
Beginning Balance (Attributable to Parent) at Jun. 30, 2023				1,962	48,333	$ 1	44,866	1,615	(4)		(19)	(88)
Beginning Balance (in shares) at Jun. 30, 2023						771
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2023													2,738
Beginning Balance (Parent) at Jun. 30, 2023		51,071
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,282			1,213			1,213					69
Other comprehensive income (loss)		232	[2]		232				239		(6)	(1)
Common stock issuances, including dividend reinvestment and employee benefits														$ 22	$ 22	$ 22
Common stock dividends		(793)			(793)			(793)
Contributions from noncontrolling interests, net of transaction costs	[3]	30											30
Distributions to noncontrolling interest in subsidiaries		(20)											(20)
Other		2			(1)		(2)	1					3
Ending Balance (Attributable to Parent) at Sep. 30, 2023		$ 49,006		$ 1,962	$ 49,006	$ 1	$ 44,886	$ 2,036	$ 235		$ (25)	$ (89)
Beginning Balance (in shares) at Sep. 30, 2023		771				771
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023		$ 2,820											$ 2,820
Ending Balance (Parent) at Sep. 30, 2023		$ 51,826
[1]See Duke Energy Condensed Consolidated Statements of Comprehensive Income for detailed activity related to Cash Flow and Fair Value hedges.[2]Net of income tax expense of approximately $69 million for the three months ended September 30, 2023, and approximately $78 million and $72 million for the nine months ended September 30, 2023, and 2022, respectively. All other periods presented include immaterial income tax impacts.[3]Relates primarily to tax equity financing activity in the Commercial Renewables Disposal Groups.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Carolinas - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Revenues	$ 7,994	$ 7,842	$ 21,848	$ 21,417
Operating Expenses
Operation, maintenance and other	1,428	1,308	4,113	4,223
Depreciation and amortization	1,353	1,299	3,913	3,793
Property and other taxes	394	368	1,136	1,118
Impairment of assets and other charges	88	(4)	96	202
Total operating expenses	5,891	5,792	16,679	16,616
Gains on Sales of Other Assets and Other, net	8	6	46	17
Operating Income	2,111	2,056	5,215	4,818
Other Income and Expenses, net	178	115	516	382
Interest Expense	774	603	2,221	1,760
Income From Continuing Operations Before Income Taxes	1,515	1,568	3,510	3,440
Income Tax Expense From Continuing Operations	42	158	316	297
Comprehensive Income Attributable to Duke Energy	1,484	1,417	2,097	3,411
Net Income Attributable to Duke Energy Corporation	1,252	1,422	1,836	3,186
Duke Energy Carolinas
Operating Revenues	2,393	2,175	6,155	5,844
Operating Expenses
Cost of sales	690	544	1,823	1,423
Operation, maintenance and other	424	436	1,285	1,410
Depreciation and amortization	407	375	1,186	1,138
Property and other taxes	90	88	276	258
Impairment of assets and other charges	64	6	70	(3)
Total operating expenses	1,675	1,449	4,640	4,226
Gains on Sales of Other Assets and Other, net		4	26	4
Operating Income	718	730	1,541	1,622
Other Income and Expenses, net	63	59	181	172
Interest Expense	172	131	504	415
Income From Continuing Operations Before Income Taxes	609	658	1,218	1,379
Income Tax Expense From Continuing Operations	30	34	97	87
Comprehensive Income Attributable to Duke Energy	579	624	1,121	1,292
Net Income Attributable to Duke Energy Corporation	$ 579	$ 624	$ 1,121	$ 1,292

Condensed Consolidated Balanc_3

Condensed Consolidated Balance Sheets - Duke Energy Carolinas - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Receivables (net of allowance for doubtful accounts)	831	1,309
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Regulatory assets	13,745	14,645
Nuclear decommissioning trust funds	9,245	8,637
Operating lease right-of-use assets, net	1,073	1,042
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Investment tax credits	856	849
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Accumulated other comprehensive loss	121	(140)
Total Liabilities and Equity	181,160	178,086
Variable Interest Entity
Current Assets
Regulatory assets	109	106
Other (includes amounts related to VIEs)	56	116
Other Noncurrent Assets
Regulatory assets	1,668	1,715
Other	43	52
Current Liabilities
Current maturities of long-term debt	428	350
Long-Term Debt (includes amounts related to VIEs)	3,025	3,108
Other Noncurrent Liabilities
Other (includes $54 at 2023 related to VIEs)	54
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	19	44
Receivables of VIEs (net of allowance for doubtful accounts)	279	338
Receivables (net of allowance for doubtful accounts)	1,028	928
Inventory	1,422	1,164
Regulatory assets	1,447	1,095
Other (includes amounts related to VIEs)	86	216
Total current assets	4,446	4,175
Property, Plant and Equipment
Cost	56,888	54,650
Accumulated depreciation and amortization	(19,668)	(18,669)
Net property, plant and equipment	37,220	35,981
Other Noncurrent Assets
Regulatory assets	4,020	4,293
Nuclear decommissioning trust funds	5,156	4,783
Operating lease right-of-use assets, net	75	78
Other	1,087	1,036
Total other noncurrent assets	10,338	10,190
Total Assets	52,004	50,346
Current Liabilities
Accounts payable	1,015	1,472
Taxes accrued	350	228
Interest accrued	150	120
Current maturities of long-term debt	19	1,018
Asset retirement obligations	238	261
Regulatory liabilities	532	530
Other	597	580
Total current liabilities	3,453	5,651
Long-Term Debt (includes amounts related to VIEs)	15,676	12,948
Other Noncurrent Liabilities
Deferred income taxes	4,369	4,153
Asset retirement obligations	5,030	5,121
Regulatory liabilities	5,614	5,783
Operating lease liabilities	75	83
Accrued pension and other post-retirement benefit costs	60	38
Investment tax credits	302	300
Other (includes $54 at 2023 related to VIEs)	565	527
Total other noncurrent liabilities	16,015	16,005
Commitments and Contingencies
Equity
Member's equity	16,566	15,448
Accumulated other comprehensive loss	(6)	(6)
Total member's equity	16,560	15,442
Total Liabilities and Equity	52,004	50,346
Duke Energy Carolinas | Variable Interest Entity
Current Assets
Regulatory assets	12	12
Other (includes amounts related to VIEs)	5	8
Other Noncurrent Assets
Regulatory assets	199	208
Current Liabilities
Current maturities of long-term debt	11	10
Long-Term Debt (includes amounts related to VIEs)	708	689
Duke Energy Carolinas | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	165	390
Current Liabilities
Accounts payable	221	209
Notes payable to affiliated companies	331	1,233
Long-Term Debt (includes amounts related to VIEs)	$ 300	$ 300

Condensed Consolidated Balanc_4

Condensed Consolidated Balance Sheets - Duke Energy Carolinas (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Regulatory assets	3,489	3,485
Current Assets: Other	602	973
Regulatory assets	13,745	14,645
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	71,353	65,873
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	154	176
Regulatory assets	109	106
Current Assets: Other	56	116
Regulatory assets	1,668	1,715
Current maturities of long-term debt	428	350
Long-Term Debt	3,025	3,108
Duke Energy Carolinas
Allowance for doubtful accounts - receivables	9	3
Allowance for doubtful accounts - receivables of VIEs	47	65
Regulatory assets	1,447	1,095
Current Assets: Other	86	216
Regulatory assets	4,020	4,293
Current maturities of long-term debt	19	1,018
Long-Term Debt	15,676	12,948
Duke Energy Carolinas | Variable Interest Entity
Regulatory assets	12	12
Current Assets: Other	5	8
Regulatory assets	199	208
Current maturities of long-term debt	11	10
Long-Term Debt	$ 708	$ 689

Condensed Consolidated Statem_7

Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Gains on sales of other assets	(46)	(16)
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Net proceeds from the sales of other assets	130	0
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	1,121	1,292
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,380	1,335
Equity component of AFUDC	(69)	(75)
Gains on sales of other assets	(26)
Impairment of assets and other charges	70	(3)
Deferred income taxes	(7)	230
Contributions to qualified pension plans	(26)	(15)
Payments for asset retirement obligations	(145)	(137)
Provision for rate refunds	(35)	(55)
(Increase) decrease in
Receivables	(4)	(17)
Receivables from affiliated companies	225	(107)
Inventory	(257)	(86)
Other current assets	(439)	(1,139)
Increase (decrease) in
Accounts payable	(523)	104
Accounts payable to affiliated companies	12	(88)
Taxes accrued	121	(9)
Other current liabilities	(48)	279
Other assets	526	22
Other liabilities	105	(269)
Net cash provided by operating activities	1,981	1,262
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,646)	(2,313)
Purchases of debt and equity securities	(1,594)	(2,083)
Proceeds from sales and maturities of debt and equity securities	1,594	2,083
Net proceeds from the sales of other assets	30
Other	(215)	(185)
Net cash used in investing activities	(2,831)	(2,498)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	2,764	1,352
Payments for the redemption of long-term debt	(1,040)	(389)
Notes payable to affiliated companies	(902)	358
Distributions to parent		(50)
Other	(1)	(1)
Net cash provided by financing activities	821	1,270
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	34
Cash, cash equivalents and restricted cash at beginning of period	53	8
Cash, cash equivalents and restricted cash at end of period	24	42
Significant non-cash transactions:
Accrued capital expenditures	$ 534	$ 460

Condensed Consolidated Statem_8

Condensed Consolidated Statements of Changes in Equity - Duke Energy Carolinas - USD ($) $ in Millions	Total	Duke Energy Carolinas	Duke Energy Carolinas Member's Equity	Duke Energy Carolinas Net Losses on Cash Flow Hedges
Beginning balance at Dec. 31, 2021		$ 13,891	$ 13,897	$ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186	1,292	1,292
Distributions to parent	(2,297)	(50)	(50)
Other	3
Ending balance at Sep. 30, 2022		15,133	15,139	(6)
Beginning balance at Jun. 30, 2022		14,509	14,515	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422	624	624
Distributions to parent	(776)
Other	2
Ending balance at Sep. 30, 2022		15,133	15,139	(6)
Beginning balance at Dec. 31, 2022		15,442	15,448	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836	1,121	1,121
Distributions to parent	(2,346)
Other	(1)	(3)	(3)
Ending balance at Sep. 30, 2023		16,560	16,566	(6)
Beginning balance at Jun. 30, 2023		15,984	15,990	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252	579	579
Distributions to parent	(793)
Other	$ 2	(3)	(3)
Ending balance at Sep. 30, 2023		$ 16,560	$ 16,566	$ (6)

Condensed Consolidated Statem_9

Condensed Consolidated Statements of Operations and Comprehensive Income - Progress Energy - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Operating Revenues		$ 7,994		$ 7,842	$ 21,848		$ 21,417
Operating Expenses
Operation, maintenance and other		1,428		1,308	4,113		4,223
Depreciation and amortization		1,353		1,299	3,913		3,793
Property and other taxes		394		368	1,136		1,118
Impairment of assets and other charges		88		(4)	96		202
Total operating expenses		5,891		5,792	16,679		16,616
Gains on Sales of Other Assets and Other, net		8		6	46		17
Operating Income		2,111		2,056	5,215		4,818
Other Income and Expenses, net		178		115	516		382
Interest Expense		774		603	2,221		1,760
Income From Continuing Operations Before Income Taxes		1,515		1,568	3,510		3,440
Income Tax Expense From Continuing Operations		42		158	316		297
Net Income		1,321		1,413	1,878		3,113
Add: Net (Income) Loss Attributable to Noncontrolling Interests		69		(9)	42		(73)
Net Income Attributable to Duke Energy Corporation		1,252		1,422	1,836		3,186
Net unrealized gains on cash flow hedges	[1]	200		14	206		276
Unrealized (losses) gains on available-for-sale securities	[1]	(6)		1	(2)		(20)
Other comprehensive income (loss)		232	[1]	0	261	[1]	242	[1]
Comprehensive Income		1,553		1,413	2,139		3,355
Less: Comprehensive Income Attributable to Noncontrolling Interests		69		(4)	42		(56)
Comprehensive Income Attributable to Duke Energy		1,484		1,417	2,097		3,411
Progress Energy
Operating Revenues		4,055		3,881	10,315		10,087
Operating Expenses
Cost of sales		1,535		1,605	3,902		3,927
Operation, maintenance and other		711		581	1,963		1,829
Depreciation and amortization		563		562	1,609		1,607
Property and other taxes		205		169	546		472
Impairment of assets and other charges		24			29		4
Total operating expenses		3,038		2,917	8,049		7,839
Gains on Sales of Other Assets and Other, net		8		3	20		6
Operating Income		1,025		967	2,286		2,254
Other Income and Expenses, net		49		45	146		150
Interest Expense		241		197	706		616
Income From Continuing Operations Before Income Taxes		833		815	1,726		1,788
Income Tax Expense From Continuing Operations		131		129	280		289
Net Income		702		686	1,446		1,499
Add: Net (Income) Loss Attributable to Noncontrolling Interests		0		0			1
Net Income Attributable to Duke Energy Corporation		702		686	1,446		1,498
Net unrealized gains on cash flow hedges							1
Unrealized (losses) gains on available-for-sale securities				(1)	2		(4)
Other comprehensive income (loss)				(1)	2		(3)
Comprehensive Income		702		685	1,448		1,496
Less: Comprehensive Income Attributable to Noncontrolling Interests							1
Comprehensive Income Attributable to Duke Energy		$ 702		$ 685	$ 1,448		$ 1,495
[1]Net of income tax expense of approximately $69 million for the three months ended September 30, 2023, and approximately $78 million and $72 million for the nine months ended September 30, 2023, and 2022, respectively. All other periods presented include immaterial income tax impacts.

Condensed Consolidated Balanc_5

Condensed Consolidated Balance Sheets - Progress Energy - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Receivables (net of allowance for doubtful accounts)	831	1,309
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,745	14,645
Nuclear decommissioning trust funds	9,245	8,637
Operating lease right-of-use assets, net	1,073	1,042
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Investment tax credits	856	849
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,886	44,862
Retained earnings	2,036	2,637
Accumulated other comprehensive loss	121	(140)
Total equity	51,826	51,853
Total Liabilities and Equity	181,160	178,086
Progress Energy
Current Assets
Cash and cash equivalents	87	108
Receivables of VIEs (net of allowance for doubtful accounts)	212	318
Receivables (net of allowance for doubtful accounts)	1,597	1,289
Inventory	1,803	1,579
Regulatory assets	1,696	1,833
Other (includes amounts related to VIEs)	164	342
Total current assets	5,579	5,491
Property, Plant and Equipment
Cost	67,872	64,822
Accumulated depreciation and amortization	(21,772)	(20,584)
Net property, plant and equipment	46,100	44,238
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets	6,448	7,146
Nuclear decommissioning trust funds	4,089	3,855
Operating lease right-of-use assets, net	631	628
Other	1,203	1,066
Total other noncurrent assets	16,026	16,350
Total Assets	67,705	66,079
Current Liabilities
Accounts payable	1,201	1,481
Taxes accrued	492	135
Interest accrued	217	206
Current maturities of long-term debt	1,265	697
Asset retirement obligations	261	289
Regulatory liabilities	515	576
Other	838	782
Total current liabilities	6,278	5,721
Long-Term Debt (includes amounts related to VIEs)	21,866	21,592
Other Noncurrent Liabilities
Deferred income taxes	5,228	5,147
Asset retirement obligations	5,669	5,892
Regulatory liabilities	4,784	4,753
Operating lease liabilities	548	546
Accrued pension and other post-retirement benefit costs	270	292
Investment tax credits	363	358
Other (includes $54 at 2023 related to VIEs)	198	222
Total other noncurrent liabilities	17,060	17,210
Commitments and Contingencies
Equity
Additional paid-in capital	11,830	11,832
Retained earnings	10,530	9,585
Accumulated other comprehensive loss	(9)	(11)
Total equity	22,351	21,406
Total Liabilities and Equity	67,705	66,079
Progress Energy | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	20	22
Current Liabilities
Accounts payable	506	712
Notes payable to affiliated companies	983	843
Long-Term Debt (includes amounts related to VIEs)	$ 150	$ 150

Condensed Consolidated Balanc_6

Condensed Consolidated Balance Sheets - Progress Energy (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Regulatory assets	3,489	3,485
Current Assets: Other	602	973
Regulatory assets	13,745	14,645
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	$ 71,353	$ 65,873
Common stock, par value (in 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)	771,000,000	770,000,000
Other (includes $54 at 2023 related to VIEs)	$ 1,325	$ 1,502
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	154	176
Regulatory assets	109	106
Current Assets: Other	56	116
Regulatory assets	1,668	1,715
Current maturities of long-term debt	428	350
Long-Term Debt	3,025	3,108
Other (includes $54 at 2023 related to VIEs)	54
Progress Energy
Allowance for doubtful accounts - receivables	16	13
Regulatory assets	1,696	1,833
Current Assets: Other	164	342
Regulatory assets	6,448	7,146
Current maturities of long-term debt	1,265	697
Long-Term Debt	$ 21,866	$ 21,592
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Other (includes $54 at 2023 related to VIEs)	$ 198	$ 222
Progress Energy | Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	61	68
Regulatory assets	97	94
Current Assets: Other	42	88
Regulatory assets	1,469	1,507
Current maturities of long-term debt	417	340
Long-Term Debt	1,911	$ 2,003
Other (includes $54 at 2023 related to VIEs)	$ 30

Condensed Consolidated State_10

Condensed Consolidated Statements of Cash Flows - Progress Energy - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,878	$ 3,113
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	1,446	1,499
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,021	1,826
Equity component of AFUDC	(49)	(50)
Impairment of assets and other charges	29	4
Deferred income taxes	(38)	284
Contributions to qualified pension plans	(22)	(13)
Payments for asset retirement obligations	(212)	(207)
Provision for rate refunds	(24)	(44)
(Increase) decrease in
Receivables	(198)	(314)
Receivables from affiliated companies	2	110
Inventory	(224)	(154)
Other current assets	399	(1,133)
Increase (decrease) in
Accounts payable	(177)	360
Accounts payable to affiliated companies	(206)	(31)
Taxes accrued	357	173
Other current liabilities	4	216
Other assets	183	(262)
Other liabilities	(10)	615
Net cash provided by operating activities	3,281	2,879
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(3,607)	(3,130)
Purchases of debt and equity securities	(1,108)	(1,301)
Proceeds from sales and maturities of debt and equity securities	1,151	1,357
Notes receivable from affiliated companies		(232)
Other	(239)	(88)
Net cash used in investing activities	(3,803)	(3,394)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,272	1,452
Payments for the redemption of long-term debt	(440)	(1,136)
Notes payable to affiliated companies	140	509
Dividends to parent	(500)	(250)
Other	(1)	(36)
Net cash provided by financing activities	471	539
Net (decrease) increase in cash, cash equivalents and restricted cash	(51)	24
Cash, cash equivalents and restricted cash at beginning of period	184	113
Cash, cash equivalents and restricted cash at end of period	133	137
Significant non-cash transactions:
Accrued capital expenditures	$ 558	$ 472

Condensed Consolidated State_11

Condensed Consolidated Statements of Changes in Equity - Progress Energy - USD ($) $ in Millions	Total		Total Equity	Additional Paid-in Capital	Retained Earnings	Net Unrealized Gains (Losses) on Available-for-Sale Securities	Pension and OPEB Adjustments	Noncontrolling Interests	Progress Energy	Progress Energy Total 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
Beginning Balance (Attributable to Parent) at Dec. 31, 2021			$ 49,296	$ 44,371	$ 3,265	$ (2)	$ (69)			$ 17,145	$ 9,149	$ 8,007	$ (2)	$ (2)	$ (7)
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2021								$ 1,840								$ 3
Beginning Balance (Parent) at Dec. 31, 2021	$ 51,136								$ 17,148
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,113								1,499	1,498		1,498				1
Other comprehensive income (loss)	242	[1]	225			(20)	(3)	17	(3)	(3)			1	(4)
Distributions to noncontrolling interests	(92)							(92)	(34)							(34)
Common stock dividends	(2,297)		(2,297)		(2,297)				(250)	(250)		(250)
Equitization of certain notes payable to affiliates									2,906	2,906	475	2,431
Other	3		3	2	1				3	3	2	1
Ending Balance (Attributable to Parent) at Sep. 30, 2022			50,345	44,397	4,063	(22)	(72)			21,299	9,626	11,687	(1)	(6)	(7)
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2022								1,824								(30)
Ending Balance (Parent) at Sep. 30, 2022	52,169								21,269
Beginning Balance (Attributable to Parent) at Jun. 30, 2022			49,720	44,373	3,457	(23)	(65)			20,137	9,149	11,001	(1)	(5)	(7)
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2022								1,864								3
Beginning Balance (Parent) at Jun. 30, 2022	51,584								20,140
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,413								686	686		686
Other comprehensive income (loss)	0		(5)			1	(7)	5	(1)	(1)				(1)
Distributions to noncontrolling interests	(42)							(42)	(33)							(33)
Common stock dividends	(776)		(776)		(776)
Equitization of certain notes payable to affiliates									475	475	475
Other	2		2	3	(1)				2	2	2
Ending Balance (Attributable to Parent) at Sep. 30, 2022			50,345	44,397	4,063	(22)	(72)			21,299	9,626	11,687	(1)	(6)	(7)
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2022								1,824								$ (30)
Ending Balance (Parent) at Sep. 30, 2022	52,169								21,269
Beginning Balance (Attributable to Parent) at Dec. 31, 2022	49,322		49,322	44,862	2,637	(23)	(88)			21,406	11,832	9,585	(1)	(8)	(2)
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022	2,531							2,531
Beginning Balance (Parent) at Dec. 31, 2022	51,853								21,406
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,878								1,446	1,446		1,446
Other comprehensive income (loss)	261	[1]	261			(2)	(1)		2	2				2
Distributions to noncontrolling interests	(45)							(45)
Common stock dividends	(2,346)		(2,346)		(2,346)				(500)	(500)		(500)
Other	(1)		(5)	(6)	1			4	(3)	(3)	(2)	(1)
Ending Balance (Attributable to Parent) at Sep. 30, 2023	49,006		49,006	44,886	2,036	(25)	(89)			22,351	11,830	10,530	(1)	(6)	(2)
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023	2,820							2,820
Ending Balance (Parent) at Sep. 30, 2023	51,826								22,351
Beginning Balance (Attributable to Parent) at Jun. 30, 2023			48,333	44,866	1,615	(19)	(88)			22,150	11,830	10,329	(1)	(6)	(2)
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2023								2,738
Beginning Balance (Parent) at Jun. 30, 2023	51,071								22,150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,321								702	702		702
Other comprehensive income (loss)	232	[1]	232			(6)	(1)
Distributions to noncontrolling interests	(20)							(20)
Common stock dividends	(793)		(793)		(793)				(500)	(500)		(500)
Other	2		(1)	(2)	1			3	(1)	(1)		(1)
Ending Balance (Attributable to Parent) at Sep. 30, 2023	49,006		$ 49,006	$ 44,886	$ 2,036	$ (25)	$ (89)			$ 22,351	$ 11,830	$ 10,530	$ (1)	$ (6)	$ (2)
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023	2,820							$ 2,820
Ending Balance (Parent) at Sep. 30, 2023	$ 51,826								$ 22,351
[1]Net of income tax expense of approximately $69 million for the three months ended September 30, 2023, and approximately $78 million and $72 million for the nine months ended September 30, 2023, and 2022, respectively. All other periods presented include immaterial income tax impacts.

Condensed Consolidated State_12

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Progress - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Revenues	$ 7,994	$ 7,842	$ 21,848	$ 21,417
Operating Expenses
Operation, maintenance and other	1,428	1,308	4,113	4,223
Depreciation and amortization	1,353	1,299	3,913	3,793
Property and other taxes	394	368	1,136	1,118
Impairment of assets and other charges	88	(4)	96	202
Total operating expenses	5,891	5,792	16,679	16,616
Gains on Sales of Other Assets and Other, net	8	6	46	17
Operating Income	2,111	2,056	5,215	4,818
Other Income and Expenses, net	178	115	516	382
Interest Expense	774	603	2,221	1,760
Income From Continuing Operations Before Income Taxes	1,515	1,568	3,510	3,440
Income Tax Expense	42	158	316	297
Comprehensive Income Attributable to Duke Energy	1,484	1,417	2,097	3,411
Net Income Attributable to Duke Energy Corporation	1,252	1,422	1,836	3,186
Duke Energy Progress
Operating Revenues	1,886	1,969	4,844	5,182
Operating Expenses
Cost of sales	651	749	1,685	1,916
Operation, maintenance and other	345	350	1,051	1,101
Depreciation and amortization	324	313	935	890
Property and other taxes	48	46	143	136
Impairment of assets and other charges	24		31	4
Total operating expenses	1,392	1,458	3,845	4,047
Gains on Sales of Other Assets and Other, net	1	1	2	2
Operating Income	495	512	1,001	1,137
Other Income and Expenses, net	31	29	92	83
Interest Expense	109	85	315	260
Income From Continuing Operations Before Income Taxes	417	456	778	960
Income Tax Expense	49	59	101	129
Comprehensive Income Attributable to Duke Energy	368	397	677	831
Net Income Attributable to Duke Energy Corporation	$ 368	$ 397	$ 677	$ 831

Condensed Consolidated Balanc_7

Condensed Consolidated Balance Sheets - Duke Energy Progress - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Receivables (net of allowance for doubtful accounts)	831	1,309
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Regulatory assets	13,745	14,645
Nuclear decommissioning trust funds	9,245	8,637
Operating lease right-of-use assets, net	1,073	1,042
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Investment tax credits	856	849
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Total Liabilities and Equity	181,160	178,086
Duke Energy Progress
Current Assets
Cash and cash equivalents	27	49
Receivables of VIEs (net of allowance for doubtful accounts)	129	167
Receivables (net of allowance for doubtful accounts)	831	793
Inventory	1,141	1,006
Regulatory assets	946	690
Other (includes amounts related to VIEs)	49	174
Total current assets	3,155	2,904
Property, Plant and Equipment
Cost	40,283	38,875
Accumulated depreciation and amortization	(14,869)	(14,201)
Net property, plant and equipment	25,414	24,674
Other Noncurrent Assets
Regulatory assets	4,406	4,724
Nuclear decommissioning trust funds	3,697	3,430
Operating lease right-of-use assets, net	329	370
Other	693	650
Total other noncurrent assets	9,125	9,174
Total Assets	37,694	36,752
Current Liabilities
Accounts payable	502	601
Taxes accrued	255	77
Interest accrued	86	101
Current maturities of long-term debt	71	369
Asset retirement obligations	260	288
Regulatory liabilities	290	332
Other	452	384
Total current liabilities	2,859	2,898
Long-Term Debt (includes amounts related to VIEs)	11,497	10,568
Other Noncurrent Liabilities
Deferred income taxes	2,558	2,477
Asset retirement obligations	5,362	5,535
Regulatory liabilities	4,120	4,120
Operating lease liabilities	298	335
Accrued pension and other post-retirement benefit costs	150	160
Investment tax credits	130	124
Other (includes $54 at 2023 related to VIEs)	84	76
Total other noncurrent liabilities	12,702	12,827
Commitments and Contingencies
Equity
Total member's equity	10,486	10,309
Total Liabilities and Equity	37,694	36,752
Duke Energy Progress | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	32	25
Current Liabilities
Accounts payable	252	508
Notes payable to affiliated companies	691	238
Long-Term Debt (includes amounts related to VIEs)	$ 150	$ 150

Condensed Consolidated Balanc_8

Condensed Consolidated Balance Sheets - Duke Energy Progress (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Regulatory assets	3,489	3,485
Current Assets: Other	602	973
Regulatory assets	13,745	14,645
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	71,353	65,873
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	154	176
Regulatory assets	109	106
Current Assets: Other	56	116
Regulatory assets	1,668	1,715
Current maturities of long-term debt	428	350
Long-Term Debt	3,025	3,108
Duke Energy Progress
Allowance for doubtful accounts - receivables	7	4
Regulatory assets	946	690
Current Assets: Other	49	174
Regulatory assets	4,406	4,724
Current maturities of long-term debt	71	369
Long-Term Debt	11,497	10,568
Duke Energy Progress | Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	37	40
Regulatory assets	39	39
Current Assets: Other	18	42
Regulatory assets	653	681
Current maturities of long-term debt	34	34
Long-Term Debt	$ 1,079	$ 1,114

Condensed Consolidated State_13

Condensed Consolidated Statements of Cash Flows - Duke Energy Progress - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	677	831
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,077	1,034
Equity component of AFUDC	(38)	(37)
Impairment of assets and other charges	31	4
Deferred income taxes	(12)	66
Contributions to qualified pension plans	(13)	(8)
Payments for asset retirement obligations	(166)	(133)
Provision for rate refunds	(24)	(44)
(Increase) decrease in
Receivables	5	(95)
Receivables from affiliated companies	(7)	64
Inventory	(135)	(58)
Other current assets	(189)	(266)
Increase (decrease) in
Accounts payable	(38)	7
Accounts payable to affiliated companies	(256)	58
Taxes accrued	178	(1)
Other current liabilities	(25)	122
Other assets	175	(105)
Other liabilities	23	39
Net cash provided by operating activities	1,263	1,478
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,756)	(1,506)
Purchases of debt and equity securities	(973)	(1,148)
Proceeds from sales and maturities of debt and equity securities	969	1,141
Notes receivable from affiliated companies	0	(329)
Other	(114)	(11)
Net cash used in investing activities	(1,874)	(1,853)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	991	1,448
Payments for the redemption of long-term debt	(364)	(612)
Notes payable to affiliated companies	452	(172)
Distributions to parent	(500)	(250)
Other	(1)	(1)
Net cash provided by financing activities	578	413
Net (decrease) increase in cash, cash equivalents and restricted cash	(33)	38
Cash, cash equivalents and restricted cash at beginning of period	79	39
Cash, cash equivalents and restricted cash at end of period	46	77
Significant non-cash transactions:
Accrued capital expenditures	$ 206	$ 184

Condensed Consolidated State_14

Condensed Consolidated Statements of Changes in Equity - Duke Energy Progress - USD ($) $ in Millions	Total	Duke Energy Progress	Duke Energy Progress Member's Equity
Beginning balance at Dec. 31, 2021			$ 9,551
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186	$ 831	831
Common stock dividends	(2,297)		(250)
Ending balance at Sep. 30, 2022			10,132
Beginning balance at Jun. 30, 2022			9,735
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422	397	397
Common stock dividends	(776)
Ending balance at Sep. 30, 2022			10,132
Beginning balance at Dec. 31, 2022		10,309	10,309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836	677	677
Common stock dividends	(2,346)		(500)
Ending balance at Sep. 30, 2023		10,486	10,486
Beginning balance at Jun. 30, 2023			10,618
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252	368	368
Common stock dividends	$ (793)		(500)
Ending balance at Sep. 30, 2023		$ 10,486	$ 10,486

Condensed Consolidated State_15

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Florida - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Operating Revenues		$ 7,994		$ 7,842	$ 21,848		$ 21,417
Operating Expenses
Operation, maintenance and other		1,428		1,308	4,113		4,223
Depreciation and amortization		1,353		1,299	3,913		3,793
Property and other taxes		394		368	1,136		1,118
Impairment of assets and other charges		88		(4)	96		202
Total operating expenses		5,891		5,792	16,679		16,616
Gains on Sales of Other Assets and Other, net		8		6	46		17
Operating Income		2,111		2,056	5,215		4,818
Other Income and Expenses, net		178		115	516		382
Interest Expense		774		603	2,221		1,760
Income From Continuing Operations Before Income Taxes		1,515		1,568	3,510		3,440
Income Tax Expense		42		158	316		297
Net Income Attributable to Duke Energy Corporation		1,252		1,422	1,836		3,186
Unrealized (losses) gains on available-for-sale securities	[1]	(6)		1	(2)		(20)
Other Comprehensive Income, net of tax		232	[1]	0	261	[1]	242	[1]
Duke Energy Florida
Operating Revenues		2,164		1,907	5,456		4,890
Operating Expenses
Cost of sales		885		856	2,218		2,011
Operation, maintenance and other		361		226	898		716
Depreciation and amortization		239		249	674		717
Property and other taxes		157		123	403		335
Impairment of assets and other charges					(1)
Total operating expenses		1,642		1,454	4,192		3,779
Gains on Sales of Other Assets and Other, net				3	1		5
Operating Income		522		456	1,265		1,116
Other Income and Expenses, net		19		19	56		74
Interest Expense		103		84	305		258
Income From Continuing Operations Before Income Taxes		438		391	1,016		932
Income Tax Expense		91		72	206		181
Net Income Attributable to Duke Energy Corporation		347		319	810		751
Unrealized (losses) gains on available-for-sale securities				(1)	2		(3)
Other Comprehensive Income, net of tax		$ 347		$ 318	$ 812		$ 748
[1]Net of income tax expense of approximately $69 million for the three months ended September 30, 2023, and approximately $78 million and $72 million for the nine months ended September 30, 2023, and 2022, respectively. All other periods presented include immaterial income tax impacts.

Condensed Consolidated Balanc_9

Condensed Consolidated Balance Sheets - Duke Energy Florida - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Receivables (net of allowance for doubtful accounts)	831	1,309
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Regulatory assets	13,745	14,645
Nuclear decommissioning trust funds	9,245	8,637
Operating lease right-of-use assets, net	1,073	1,042
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Investment tax credits	856	849
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Accumulated other comprehensive loss	121	(140)
Total Liabilities and Equity	181,160	178,086
Variable Interest Entity
Current Assets
Regulatory assets	109	106
Other (includes amounts related to VIEs)	56	116
Other Noncurrent Assets
Regulatory assets	1,668	1,715
Other	43	52
Current Liabilities
Current maturities of long-term debt	428	350
Long-Term Debt (includes amounts related to VIEs)	3,025	3,108
Other Noncurrent Liabilities
Other (includes $54 at 2023 related to VIEs)	54
Duke Energy Florida
Current Assets
Cash and cash equivalents	41	45
Receivables of VIEs (net of allowance for doubtful accounts)	80	148
Receivables (net of allowance for doubtful accounts)	766	496
Inventory	662	573
Regulatory assets	749	1,143
Other (includes amounts related to VIEs)	129	108
Total current assets	2,430	2,515
Property, Plant and Equipment
Cost	27,581	25,940
Accumulated depreciation and amortization	(6,896)	(6,377)
Net property, plant and equipment	20,685	19,563
Other Noncurrent Assets
Regulatory assets	2,042	2,422
Nuclear decommissioning trust funds	393	424
Operating lease right-of-use assets, net	302	258
Other	463	372
Total other noncurrent assets	3,200	3,476
Total Assets	26,315	25,554
Current Liabilities
Accounts payable	698	880
Taxes accrued	342	53
Interest accrued	104	80
Current maturities of long-term debt	1,194	328
Asset retirement obligations	1	1
Regulatory liabilities	224	244
Other	349	363
Total current liabilities	3,358	2,731
Long-Term Debt (includes amounts related to VIEs)	8,726	9,381
Other Noncurrent Liabilities
Deferred income taxes	2,771	2,789
Asset retirement obligations	307	357
Regulatory liabilities	664	633
Operating lease liabilities	250	211
Accrued pension and other post-retirement benefit costs	100	111
Investment tax credits	233	234
Other (includes $54 at 2023 related to VIEs)	70	84
Total other noncurrent liabilities	4,395	4,419
Commitments and Contingencies
Equity
Member's equity	9,842	9,031
Accumulated other comprehensive loss	(6)	(8)
Total member's equity	9,836	9,023
Total Liabilities and Equity	26,315	25,554
Duke Energy Florida | Variable Interest Entity
Current Assets
Regulatory assets	58	55
Other (includes amounts related to VIEs)	24	46
Other Noncurrent Assets
Regulatory assets	816	826
Current Liabilities
Current maturities of long-term debt	383	306
Long-Term Debt (includes amounts related to VIEs)	832	890
Other Noncurrent Liabilities
Other (includes $54 at 2023 related to VIEs)	11
Duke Energy Florida | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	3	2
Current Liabilities
Accounts payable	154	177
Notes payable to affiliated companies	292	605
Duke Energy Progress
Current Assets
Cash and cash equivalents	27	49
Receivables of VIEs (net of allowance for doubtful accounts)	129	167
Receivables (net of allowance for doubtful accounts)	831	793
Inventory	1,141	1,006
Regulatory assets	946	690
Other (includes amounts related to VIEs)	49	174
Total current assets	3,155	2,904
Property, Plant and Equipment
Cost	40,283	38,875
Accumulated depreciation and amortization	(14,869)	(14,201)
Net property, plant and equipment	25,414	24,674
Other Noncurrent Assets
Regulatory assets	4,406	4,724
Nuclear decommissioning trust funds	3,697	3,430
Operating lease right-of-use assets, net	329	370
Other	693	650
Total other noncurrent assets	9,125	9,174
Total Assets	37,694	36,752
Current Liabilities
Accounts payable	502	601
Taxes accrued	255	77
Interest accrued	86	101
Current maturities of long-term debt	71	369
Asset retirement obligations	260	288
Regulatory liabilities	290	332
Other	452	384
Total current liabilities	2,859	2,898
Long-Term Debt (includes amounts related to VIEs)	11,497	10,568
Other Noncurrent Liabilities
Deferred income taxes	2,558	2,477
Asset retirement obligations	5,362	5,535
Regulatory liabilities	4,120	4,120
Operating lease liabilities	298	335
Accrued pension and other post-retirement benefit costs	150	160
Investment tax credits	130	124
Other (includes $54 at 2023 related to VIEs)	84	76
Total other noncurrent liabilities	12,702	12,827
Commitments and Contingencies
Equity
Total member's equity	10,486	10,309
Total Liabilities and Equity	37,694	36,752
Duke Energy Progress | Variable Interest Entity
Current Assets
Regulatory assets	39	39
Other (includes amounts related to VIEs)	18	42
Other Noncurrent Assets
Regulatory assets	653	681
Current Liabilities
Current maturities of long-term debt	34	34
Long-Term Debt (includes amounts related to VIEs)	1,079	1,114
Other Noncurrent Liabilities
Other (includes $54 at 2023 related to VIEs)	19
Duke Energy Progress | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	32	25
Current Liabilities
Accounts payable	252	508
Notes payable to affiliated companies	691	238
Long-Term Debt (includes amounts related to VIEs)	$ 150	$ 150

Condensed Consolidated Balan_10

Condensed Consolidated Balance Sheets - Duke Energy Florida (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Current Assets: Other	602	973
Regulatory assets	13,745	14,645
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	71,353	65,873
Regulatory assets	3,489	3,485
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	154	176
Current Assets: Other	56	116
Regulatory assets	1,668	1,715
Current maturities of long-term debt	428	350
Long-Term Debt	3,025	3,108
Regulatory assets	109	106
Duke Energy Florida
Allowance for doubtful accounts - receivables	10	8
Current Assets: Other	129	108
Regulatory assets	2,042	2,422
Current maturities of long-term debt	1,194	328
Long-Term Debt	8,726	9,381
Regulatory assets	749	1,143
Duke Energy Florida | Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	24	28
Current Assets: Other	24	46
Regulatory assets	816	826
Current maturities of long-term debt	383	306
Long-Term Debt	832	890
Regulatory assets	$ 58	$ 55

Condensed Consolidated State_16

Condensed Consolidated Statements of Cash Flows - Duke Energy Florida - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Losses on sales of other assets	46	16
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Equity in earnings of unconsolidated affiliates	(70)	(87)
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	810	751
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	943	790
Equity component of AFUDC	(10)	(13)
Impairment of assets and other charges	(1)
Deferred income taxes	(42)	237
Equity in earnings of unconsolidated affiliates	1
Contributions to qualified pension plans	(9)	(5)
Payments for asset retirement obligations	(46)	(73)
(Increase) decrease in
Receivables	(203)	(218)
Receivables from affiliated companies	(1)	10
Inventory	(89)	(95)
Other current assets	516	(814)
Increase (decrease) in
Accounts payable	(140)	354
Accounts payable to affiliated companies	(23)	(90)
Taxes accrued	289	123
Other current liabilities	23	72
Other assets	12	(162)
Other liabilities	(14)	37
Net cash provided by operating activities	2,016	904
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,851)	(1,624)
Purchases of debt and equity securities	(135)	(153)
Proceeds from sales and maturities of debt and equity securities	182	216
Other	(125)	(76)
Net cash used in investing activities	(1,929)	(1,637)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	281	4
Payments for the redemption of long-term debt	(76)	(74)
Notes payable to affiliated companies	(313)	784
Other	(1)	(1)
Net cash provided by financing activities	(109)	713
Net (decrease) increase in cash, cash equivalents and restricted cash	(22)	(20)
Cash, cash equivalents and restricted cash at beginning of period	86	62
Cash, cash equivalents and restricted cash at end of period	64	42
Significant non-cash transactions:
Accrued capital expenditures	$ 352	$ 288

Condensed Consolidated State_17

Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($) $ in Millions		Total		Duke Energy Florida	Duke Energy Florida Member's Equity	Duke Energy Florida Net Unrealized Gains (Losses) on Available-for-Sale Securities
Beginning balance at Dec. 31, 2021				$ 8,295	$ 8,298	$ (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 3,186		751	751
Other comprehensive income (loss)		(20)	[1]	(3)		(3)
Other		3
Ending balance at Sep. 30, 2022				9,043	9,049	(6)
Beginning balance at Jun. 30, 2022				8,725	8,730	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,422		319	319
Other comprehensive income (loss)		1	[1]	(1)		(1)
Other		2
Ending balance at Sep. 30, 2022				9,043	9,049	(6)
Beginning balance at Dec. 31, 2022				9,023	9,031	(8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,836		810	810
Other comprehensive income (loss)		(2)	[1]	2		2
Other		(1)		1	1
Ending balance at Sep. 30, 2023				9,836	9,842	(6)
Beginning balance at Jun. 30, 2023				9,488	9,494	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,252		347	347
Other comprehensive income (loss)	[1]	(6)
Other		$ 2		1	1
Ending balance at Sep. 30, 2023				$ 9,836	$ 9,842	$ (6)
[1]Net of income tax expense of approximately $69 million for the three months ended September 30, 2023, and approximately $78 million and $72 million for the nine months ended September 30, 2023, and 2022, respectively. All other periods presented include immaterial income tax impacts.

Condensed Consolidated State_18

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Ohio - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Regulated electric	$ 7,640	$ 7,373	$ 20,140	$ 19,381
Regulated natural gas	284	397	1,497	1,824
Total operating revenues	7,994	7,842	21,848	21,417
Operating Expenses
Operation, maintenance and other	1,428	1,308	4,113	4,223
Depreciation and amortization	1,353	1,299	3,913	3,793
Property and other taxes	394	368	1,136	1,118
Total operating expenses	5,891	5,792	16,679	16,616
Gains on Sales of Other Assets and Other, net	8	6	46	17
Operating Income	2,111	2,056	5,215	4,818
Other Income and Expenses, net	178	115	516	382
Interest Expense	774	603	2,221	1,760
Income From Continuing Operations Before Income Taxes	1,515	1,568	3,510	3,440
Income Tax Expense From Continuing Operations	42	158	316	297
Comprehensive Income Attributable to Duke Energy	1,484	1,417	2,097	3,411
Net Income Attributable to Duke Energy Corporation	1,252	1,422	1,836	3,186
Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales	2,571	2,632	6,987	6,421
Cost of natural gas
Operating Expenses
Cost of sales	57	189	434	859
Duke Energy Ohio
Regulated electric	472	507	1,411	1,320
Regulated natural gas	105	121	464	491
Total operating revenues	577	628	1,875	1,811
Operating Expenses
Operation, maintenance and other	114	121	358	408
Depreciation and amortization	90	84	266	247
Property and other taxes	94	79	258	272
Total operating expenses	449	479	1,485	1,529
Gains on Sales of Other Assets and Other, net		(1)
Operating Income	128	148	390	282
Other Income and Expenses, net	12	4	33	16
Interest Expense	46	32	125	92
Income From Continuing Operations Before Income Taxes	94	120	298	206
Income Tax Expense From Continuing Operations	14	17	47	(30)
Comprehensive Income Attributable to Duke Energy	80	103	251	236
Net Income Attributable to Duke Energy Corporation	80	103	251	236
Duke Energy Ohio | Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales	145	185	485	439
Duke Energy Ohio | Cost of natural gas
Operating Expenses
Cost of sales	$ 6	$ 21	$ 118	$ 174

Condensed Consolidated Balan_11

Condensed Consolidated Balance Sheets - Duke Energy Ohio - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,745	14,645
Operating lease right-of-use assets, net	1,073	1,042
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,886	44,862
Retained earnings	2,036	2,637
Total equity	51,826	51,853
Total Liabilities and Equity	181,160	178,086
Duke Energy Ohio
Current Assets
Cash and cash equivalents	20	16
Receivables of VIEs (net of allowance for doubtful accounts)	97	73
Inventory	168	144
Regulatory assets	48	103
Other (includes amounts related to VIEs)	47	86
Total current assets	535	669
Property, Plant and Equipment
Cost	12,976	12,497
Accumulated depreciation and amortization	(3,385)	(3,250)
Net property, plant and equipment	9,591	9,247
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets	655	581
Operating lease right-of-use assets, net	17	18
Other	76	71
Total other noncurrent assets	1,668	1,590
Total Assets	11,794	11,506
Current Liabilities
Accounts payable	322	380
Taxes accrued	247	317
Interest accrued	51	29
Current maturities of long-term debt	175	475
Asset retirement obligations	8	17
Regulatory liabilities	46	99
Other	72	74
Total current liabilities	1,265	1,960
Long-Term Debt (includes amounts related to VIEs)	3,492	2,745
Other Noncurrent Liabilities
Deferred income taxes	1,169	1,136
Asset retirement obligations	130	137
Regulatory liabilities	498	534
Operating lease liabilities	17	17
Accrued pension and other post-retirement benefit costs	91	90
Other (includes $54 at 2023 related to VIEs)	90	96
Total other noncurrent liabilities	1,995	2,010
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	3,100	3,100
Retained earnings	1,155	904
Total equity	5,017	4,766
Total Liabilities and Equity	11,794	11,506
Duke Energy Ohio | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	155	247
Current Liabilities
Accounts payable	71	72
Notes payable to affiliated companies	273	497
Long-Term Debt (includes amounts related to VIEs)	$ 25	$ 25

Condensed Consolidated Balan_12

Condensed Consolidated Balance Sheets - Duke Energy Ohio (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Common stock, par value (in 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)	771,000,000	770,000,000
Duke Energy Ohio
Allowance for doubtful accounts - receivables	$ 8	$ 6
Common stock, par value (in 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

Condensed Consolidated State_19

Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	251	236
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	269	251
Equity component of AFUDC	(7)	(7)
Deferred income taxes	7	(13)
Contributions to qualified pension plans	(5)	(3)
Payments for asset retirement obligations	(9)	(7)
Provision for rate refunds		5
(Increase) decrease in
Receivables	(23)	8
Receivables from affiliated companies	103	11
Inventory	(24)	(2)
Other current assets	103	(60)
Increase (decrease) in
Accounts payable	(69)	(6)
Accounts payable to affiliated companies	(1)	(4)
Taxes accrued	(70)	(44)
Other current liabilities	(29)	(76)
Other assets	(39)	(54)
Other liabilities	(8)	80
Net cash provided by operating activities	449	304
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(676)	(623)
Losses on sales of other assets	75
Notes receivable from affiliated companies	(11)	(85)
Other	(53)	(47)
Net cash used in investing activities	(665)	(755)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	749	50
Payments for the redemption of long-term debt	(300)
Notes payable to affiliated companies	(224)	399
Other	(5)	(2)
Net cash provided by financing activities	220	447
Net (decrease) increase in cash, cash equivalents and restricted cash	4	(4)
Cash, cash equivalents and restricted cash at beginning of period	16	13
Cash, cash equivalents and restricted cash at end of period	20	9
Significant non-cash transactions:
Accrued capital expenditures	$ 134	$ 119

Condensed Consolidated State_20

Condensed Consolidated Statements of Changes in Equity - Duke Energy Ohio - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Duke Energy Ohio	Duke Energy Ohio Common Stock	Duke Energy Ohio Additional Paid-in Capital	Duke Energy Ohio Retained Earnings
Beginning Balance (Attributable to Parent) at Dec. 31, 2021		$ 1	$ 44,371	$ 3,265	$ 4,464	$ 762	$ 3,100	$ 602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186				236			236
Other	3		2	1	1			1
Ending Balance (Attributable to Parent) at Sep. 30, 2022		1	44,397	4,063	4,701	762	3,100	839
Beginning Balance (Attributable to Parent) at Jun. 30, 2022		1	44,373	3,457	4,597	762	3,100	735
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422				103			103
Other	2		3	(1)	1			1
Ending Balance (Attributable to Parent) at Sep. 30, 2022		1	44,397	4,063	4,701	762	3,100	839
Beginning Balance (Attributable to Parent) at Dec. 31, 2022	49,322	1	44,862	2,637	4,766	762	3,100	904
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836				251			251
Other	(1)		(6)	1
Ending Balance (Attributable to Parent) at Sep. 30, 2023	49,006	1	44,886	2,036	5,017	762	3,100	1,155
Beginning Balance (Attributable to Parent) at Jun. 30, 2023		1	44,866	1,615	4,937	762	3,100	1,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252				80			80
Other	2		(2)	1
Ending Balance (Attributable to Parent) at Sep. 30, 2023	$ 49,006	$ 1	$ 44,886	$ 2,036	$ 5,017	$ 762	$ 3,100	$ 1,155

Condensed Consolidated State_21

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Indiana - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Revenues	$ 7,994	$ 7,842	$ 21,848	$ 21,417
Operating Expenses
Operation, maintenance and other	1,428	1,308	4,113	4,223
Depreciation and amortization	1,353	1,299	3,913	3,793
Property and other taxes	394	368	1,136	1,118
Impairment of assets and other charges	88	(4)	96	202
Total operating expenses	5,891	5,792	16,679	16,616
Operating Income	2,111	2,056	5,215	4,818
Other Income and Expenses, net	178	115	516	382
Interest Expense	774	603	2,221	1,760
Income From Continuing Operations Before Income Taxes	1,515	1,568	3,510	3,440
Income Tax Expense From Continuing Operations	42	158	316	297
Comprehensive Income Attributable to Duke Energy	1,484	1,417	2,097	3,411
Net Income Attributable to Duke Energy Corporation	1,252	1,422	1,836	3,186
Duke Energy Indiana
Operating Revenues	851	1,095	2,606	2,835
Operating Expenses
Cost of sales	283	556	980	1,234
Operation, maintenance and other	160	177	524	551
Depreciation and amortization	173	167	500	478
Property and other taxes	17	13	42	60
Impairment of assets and other charges				211
Total operating expenses	633	913	2,046	2,534
Operating Income	218	182	560	301
Other Income and Expenses, net	30	9	58	27
Interest Expense	53	48	157	138
Income From Continuing Operations Before Income Taxes	195	143	461	190
Income Tax Expense From Continuing Operations	36	24	82	1
Comprehensive Income Attributable to Duke Energy	159	119	379	189
Net Income Attributable to Duke Energy Corporation	$ 159	$ 119	$ 379	$ 189

Condensed Consolidated Balan_13

Condensed Consolidated Balance Sheets - Duke Energy Indiana - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 324	$ 409
Receivables of VIEs (net of allowance for doubtful accounts)	3,244	3,106
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Regulatory assets	13,745	14,645
Operating lease right-of-use assets, net	1,073	1,042
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Asset retirement obligations	620	773
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Investment tax credits	856	849
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Accumulated other comprehensive loss	121	(140)
Total Liabilities and Equity	181,160	178,086
Duke Energy Indiana
Current Assets
Cash and cash equivalents	14	31
Receivables of VIEs (net of allowance for doubtful accounts)	117	112
Inventory	600	489
Regulatory assets	93	249
Other	59	197
Total current assets	1,037	1,376
Property, Plant and Equipment
Cost	18,638	18,121
Accumulated depreciation and amortization	(6,359)	(6,021)
Net property, plant and equipment	12,279	12,100
Other Noncurrent Assets
Regulatory assets	899	875
Operating lease right-of-use assets, net	47	49
Other	323	254
Total other noncurrent assets	1,269	1,178
Total Assets	14,585	14,654
Current Liabilities
Accounts payable	277	391
Taxes accrued	88	92
Interest accrued	74	48
Current maturities of long-term debt	3	303
Asset retirement obligations	114	207
Regulatory liabilities	205	187
Other	157	161
Total current liabilities	1,229	2,030
Long-Term Debt (includes amounts related to VIEs)	4,351	3,854
Other Noncurrent Liabilities
Deferred income taxes	1,352	1,299
Asset retirement obligations	728	744
Regulatory liabilities	1,478	1,454
Operating lease liabilities	45	47
Accrued pension and other post-retirement benefit costs	116	122
Investment tax credits	186	186
Other (includes $54 at 2023 related to VIEs)	14	65
Total other noncurrent liabilities	3,919	3,917
Commitments and Contingencies
Equity
Member's equity	4,935	4,702
Accumulated other comprehensive loss	1	1
Total member's equity	4,936	4,703
Total Liabilities and Equity	14,585	14,654
Duke Energy Indiana | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	154	298
Current Liabilities
Accounts payable	111	206
Notes payable to affiliated companies	200	435
Long-Term Debt (includes amounts related to VIEs)	$ 150	$ 150

Condensed Consolidated Balan_14

Condensed Consolidated Balance Sheets - Duke Energy Indiana (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Duke Energy Indiana
Allowance for doubtful accounts - receivables	$ 5	$ 4

Condensed Consolidated State_22

Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	423	418
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	379	189
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	503	481
Equity component of AFUDC	(7)	(12)
Impairment of assets and other charges		211
Deferred income taxes	15	(26)
Contributions to qualified pension plans	(8)	(5)
Payments for asset retirement obligations	57	67
(Increase) decrease in
Receivables	(23)	(1)
Receivables from affiliated companies	(12)	17
Inventory	(112)	(34)
Other current assets	209	(181)
Increase (decrease) in
Accounts payable	(86)	44
Accounts payable to affiliated companies	(32)	(24)
Taxes accrued	(4)	5
Other current liabilities	107	18
Other assets	(62)	8
Other liabilities	26	9
Net cash provided by operating activities	836	632
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(699)	(643)
Purchases of debt and equity securities	(53)	(43)
Proceeds from sales and maturities of debt and equity securities	42	32
Notes receivable from affiliated companies	156	(32)
Other	(50)	(38)
Net cash used in investing activities	(604)	(724)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	495	67
Payments for the redemption of long-term debt	(300)	(81)
Notes payable to affiliated companies	(234)	483
Distributions to parent	(209)	(350)
Other	(1)	(1)
Net cash provided by financing activities	(249)	118
Net (decrease) increase in cash, cash equivalents and restricted cash	(17)	26
Cash, cash equivalents and restricted cash at beginning of period	31	6
Cash, cash equivalents and restricted cash at end of period	14	32
Significant non-cash transactions:
Accrued capital expenditures	$ 94	$ 102

Condensed Consolidated State_23

Condensed Consolidated Statements of Changes in Equity - Duke Energy Indiana - USD ($) $ in Millions	Total	Duke Energy Indiana	Duke Energy Indiana Member's Equity	Duke Energy Indiana Pension and OPEB Adjustments
Beginning balance at Dec. 31, 2021		$ 5,015	$ 5,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186	189	189
Other	3
Distributions to parent	(2,297)	(225)	(225)
Ending balance at Sep. 30, 2022		4,979	4,979
Beginning balance at Jun. 30, 2022		4,861	4,861
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422	119	119
Other	2	(1)	(1)
Distributions to parent	(776)
Ending balance at Sep. 30, 2022		4,979	4,979
Beginning balance at Dec. 31, 2022		4,703	4,702	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836	379	379
Other	(1)
Distributions to parent	(2,346)	(146)	(146)
Ending balance at Sep. 30, 2023		4,936	4,935	1
Beginning balance at Jun. 30, 2023		4,827	4,826	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252	159	159
Other	2
Distributions to parent	$ (793)	(50)	(50)
Ending balance at Sep. 30, 2023		$ 4,936	$ 4,935	$ 1

Condensed Consolidated State_24

Condensed Consolidated Statements of Operations and Comprehensive Income - Piedmont - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Revenues	$ 7,994	$ 7,842	$ 21,848	$ 21,417
Operating Expenses
Operation, maintenance and other	1,428	1,308	4,113	4,223
Depreciation and amortization	1,353	1,299	3,913	3,793
Property and other taxes	394	368	1,136	1,118
Impairment of assets and other charges	88	(4)	96	202
Total operating expenses	5,891	5,792	16,679	16,616
Gains on Sales of Other Assets and Other, net	8	6	46	17
Operating Income	2,111	2,056	5,215	4,818
Other Income and Expenses, net	178	115	516	382
Interest Expense	774	603	2,221	1,760
Income From Continuing Operations Before Income Taxes	1,515	1,568	3,510	3,440
Income Tax Expense From Continuing Operations	42	158	316	297
Net Income Attributable to Duke Energy Corporation	1,252	1,422	1,836	3,186
Comprehensive Income Attributable to Duke Energy	1,484	1,417	2,097	3,411
Piedmont
Operating Revenues	208	306	1,119	1,421
Operating Expenses
Cost of natural gas	51	168	316	685
Operation, maintenance and other	77	87	248	270
Depreciation and amortization	59	56	175	166
Property and other taxes	16	13	46	44
Impairment of assets and other charges		1	(4)	1
Total operating expenses	203	325	781	1,166
Gains on Sales of Other Assets and Other, net	0	0		4
Operating Income	5	(19)	338	259
Other Income and Expenses, net	17	13	49	41
Interest Expense	41	36	120	102
Income From Continuing Operations Before Income Taxes	(19)	(42)	267	198
Income Tax Expense From Continuing Operations	(5)	(9)	46	18
Net Income Attributable to Duke Energy Corporation	(14)	(33)	221	180
Comprehensive Income Attributable to Duke Energy	$ (14)	$ (33)	$ 221	$ 180

Condensed Consolidated Balan_15

Condensed Consolidated Balance Sheets - Piedmont - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	$ 3,244	$ 3,106
Inventory	4,118	3,584
Regulatory assets	3,489	3,485
Other (includes amounts related to VIEs)	602	973
Total current assets	13,048	13,222
Property, Plant and Equipment
Cost	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Facilities to be retired, net	0	9
Net property, plant and equipment	115,947	111,748
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,745	14,645
Operating lease right-of-use assets, net	1,073	1,042
Investments in equity method unconsolidated affiliates	505	455
Other	3,698	3,400
Total other noncurrent assets	52,165	53,116
Total Assets	181,160	178,086
Current Liabilities
Accounts payable	3,539	4,754
Taxes accrued	991	722
Interest accrued	750	626
Current maturities of long-term debt	4,034	3,878
Regulatory liabilities	1,396	1,466
Other	2,087	2,167
Total current liabilities	17,160	18,873
Long-Term Debt (includes amounts related to VIEs)	71,353	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,438	9,964
Asset retirement obligations	11,613	11,955
Regulatory liabilities	13,396	13,582
Operating lease liabilities	897	876
Accrued pension and other post-retirement benefit costs	662	832
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Total other noncurrent liabilities	40,821	41,487
Commitments and Contingencies
Equity
Common stock	1	1
Retained earnings	2,036	2,637
Total Duke Energy Corporation stockholders' equity	49,006	49,322
Noncontrolling interests	2,820	2,531
Total equity	51,826	51,853
Total Liabilities and Equity	181,160	178,086
Piedmont
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	99	436
Inventory	88	172
Regulatory assets	120	119
Other (includes amounts related to VIEs)	63	4
Total current assets	382	742
Property, Plant and Equipment
Cost	11,595	10,869
Accumulated depreciation and amortization	(2,230)	(2,081)
Facilities to be retired, net	0	9
Net property, plant and equipment	9,365	8,797
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets	415	392
Operating lease right-of-use assets, net	3	4
Investments in equity method unconsolidated affiliates	78	79
Other	288	272
Total other noncurrent assets	833	796
Total Assets	10,580	10,335
Current Liabilities
Accounts payable	209	345
Taxes accrued	44	74
Interest accrued	49	40
Current maturities of long-term debt	85	45
Regulatory liabilities	98	74
Other	66	81
Total current liabilities	896	1,224
Long-Term Debt (includes amounts related to VIEs)	3,628	3,318
Other Noncurrent Liabilities
Deferred income taxes	948	870
Asset retirement obligations	28	26
Regulatory liabilities	993	1,024
Operating lease liabilities	10	13
Accrued pension and other post-retirement benefit costs	7	7
Other (includes $54 at 2023 related to VIEs)	176	180
Total other noncurrent liabilities	2,162	2,120
Commitments and Contingencies
Equity
Common stock	1,635	1,635
Retained earnings	2,258	2,037
Total Duke Energy Corporation stockholders' equity	3,893	3,672
Noncontrolling interests	1	1
Total equity	3,894	3,673
Total Liabilities and Equity	10,580	10,335
Piedmont | Affiliated Entity
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	12	11
Current Liabilities
Accounts payable	48	51
Notes payable to affiliated companies	$ 297	$ 514

Condensed Consolidated Balan_16

Condensed Consolidated Balance Sheets - Piedmont (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 49	$ 40
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	771,000,000	770,000,000
Piedmont
Allowance for doubtful accounts - receivables	$ 10	$ 14
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100

Condensed Consolidated State_25

Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Equity in earnings of unconsolidated affiliates	(70)	(87)
Contributions to qualified pension plans	(100)	(58)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Contributions to equity method investments	(30)	(37)
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	221	180
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	177	168
Equity component of AFUDC	(15)	(7)
Impairment of assets and other charges	(4)	1
Deferred income taxes	52	13
Equity in earnings of unconsolidated affiliates	(6)	(5)
Contributions to qualified pension plans	(3)	(2)
Provision for rate refunds	0	(3)
(Increase) decrease in
Receivables	335	198
Receivables from affiliated companies	(1)	1
Inventory	83	(26)
Other current assets	(63)	(91)
Increase (decrease) in
Accounts payable	(78)	24
Accounts payable to affiliated companies	(3)	(5)
Taxes accrued	(30)	(18)
Other current liabilities	25	23
Other assets	(23)	(8)
Other liabilities	7	(3)
Net cash provided by operating activities	674	440
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(774)	(598)
Contributions to equity method investments		(8)
Other	(32)	(17)
Net cash used in investing activities	(806)	(623)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	348	394
Notes payable to affiliated companies	(216)	(210)
Other	0	(1)
Net cash provided by financing activities	132	183
Significant non-cash transactions:
Accrued capital expenditures	$ 149	$ 163

Condensed Consolidated State_26

Condensed Consolidated Statements of Changes in Equity - Piedmont - USD ($) $ in Millions	Total	Common Stock	Retained Earnings	Total Equity	Noncontrolling Interests	Piedmont	Piedmont Common Stock	Piedmont Retained Earnings	Piedmont Total Equity	Piedmont Noncontrolling Interests
Beginning Balance (Attributable to Parent) at Dec. 31, 2021		$ 1	$ 3,265	$ 49,296			$ 1,635	$ 1,714	$ 3,349
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2021					$ 1,840					$ 0
Beginning Balance (Parent) at Dec. 31, 2021	$ 51,136					$ 3,349
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,113					180		180	180
Ending Balance (Attributable to Parent) at Sep. 30, 2022		1	4,063	50,345			1,635	1,894	3,529
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2022					1,824					0
Ending Balance (Parent) at Sep. 30, 2022	52,169					3,529
Beginning Balance (Attributable to Parent) at Jun. 30, 2022		1	3,457	49,720			1,635	1,927	3,562
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2022					1,864					0
Beginning Balance (Parent) at Jun. 30, 2022	51,584					3,562
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,413					(33)		(33)	(33)
Ending Balance (Attributable to Parent) at Sep. 30, 2022		1	4,063	50,345			1,635	1,894	3,529
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2022					1,824					0
Ending Balance (Parent) at Sep. 30, 2022	52,169					3,529
Beginning Balance (Attributable to Parent) at Dec. 31, 2022	49,322	1	2,637	49,322		3,672	1,635	2,037	3,672
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022	2,531				2,531	1				1
Beginning Balance (Parent) at Dec. 31, 2022	51,853					3,673
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,878					221		221	221
Ending Balance (Attributable to Parent) at Sep. 30, 2023	49,006	1	2,036	49,006		3,893	1,635	2,258	3,893
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023	2,820				2,820	1				1
Ending Balance (Parent) at Sep. 30, 2023	51,826					3,894
Beginning Balance (Attributable to Parent) at Jun. 30, 2023		1	1,615	48,333			1,635	2,272	3,907
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2023					2,738					1
Beginning Balance (Parent) at Jun. 30, 2023	51,071					3,908
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,321					(14)		(14)	(14)
Ending Balance (Attributable to Parent) at Sep. 30, 2023	49,006	$ 1	$ 2,036	$ 49,006		3,893	$ 1,635	$ 2,258	$ 3,893
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023	2,820				$ 2,820	1				$ 1
Ending Balance (Parent) at Sep. 30, 2023	$ 51,826					$ 3,894

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	ORGANIZATION AND BASIS OF PRESENTATION BASIS OF PRESENTATION These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in the Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2022. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself. These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors. In preparing financial statements that conform to GAAP, management 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. BASIS OF CONSOLIDATION These Condensed 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 13 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. 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 condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented. For the nine months ended September 30, 2023, and 2022, the Loss (Income) From Discontinued Operations, net of tax on Duke Energy's Condensed Consolidated Statements of Operations includes amounts related to noncontrolling interests. A portion of Noncontrolling interests on Duke Energy's Condensed 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 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 Condensed Consolidated Balance Sheets. 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. CASH, CASH EQUIVALENTS AND RESTRICTED CASH Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 11 and 13 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy (a) Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 324 $ 19 $ 87 $ 27 $ 41 $ 409 $ 44 $ 108 $ 49 $ 45 Other 49 4 44 17 23 82 8 74 28 41 Other Noncurrent Assets Other 9 1 2 2 — 11 1 2 2 — Total cash, cash equivalents and restricted cash $ 382 $ 24 $ 133 $ 46 $ 64 $ 502 $ 53 $ 184 $ 79 $ 86 (a) Certain prior year balances have been adjusted for held for sale presentation. See Note 2 for additional information. INVENTORY Provisions for inventory write-offs were not material at September 30, 2023, and December 31, 2022. The components of inventory are presented in the tables below. September 30, 2023 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 $ 3,018 $ 1,045 $ 1,408 $ 920 $ 488 $ 132 $ 381 $ 15 Coal 758 330 187 110 77 24 217 — Natural gas, oil and other fuel 342 47 208 111 97 12 2 73 Total inventory $ 4,118 $ 1,422 $ 1,803 $ 1,141 $ 662 $ 168 $ 600 $ 88 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 fuel 360 35 157 88 69 5 3 160 Total inventory $ 3,584 $ 1,164 $ 1,579 $ 1,006 $ 573 $ 144 $ 489 $ 172 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 arrangement 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. ACCOUNTS PAYABLE Duke Energy maintains 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. Duke Energy confirms invoices sold by suppliers under the program to the financial institution and pays the financial institution based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms. 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 represents the changes in confirmed obligations outstanding for the three and nine months ended September 30, 2023, and 2022. Three months ended September 30, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Confirmed obligations outstanding at the June 30, 2022 $ 46 $ 9 $ 11 $ 3 $ 8 $ 9 $ — $ 17 Invoices confirmed during the period 86 6 21 7 14 12 — 47 Confirmed invoices paid during the period (58) (12) (15) (5) (10) (9) — (22) Confirmed obligations outstanding at September 30, 2022 $ 74 $ 3 $ 17 $ 5 $ 12 $ 12 $ — $ 42 Confirmed obligations outstanding at the June 30, 2023 $ 40 $ 5 $ 14 $ 12 $ 2 $ 2 $ — $ 19 Invoices confirmed during the period 47 2 11 2 9 4 — 30 Confirmed invoices paid during the period (18) (4) (8) (3) (5) — — (6) Confirmed obligations outstanding at September 30, 2023 $ 69 $ 3 $ 17 $ 11 $ 6 $ 6 $ — $ 43 Nine months ended September 30, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Confirmed obligations outstanding at the December 31, 2021 $ 19 $ — $ 9 $ — $ 9 $ 6 $ — $ 4 Invoices confirmed during the period 181 20 52 17 35 27 1 81 Confirmed invoices paid during the period (126) (17) (44) (12) (32) (21) (1) (43) Confirmed obligations outstanding at September 30, 2022 $ 74 $ 3 $ 17 $ 5 $ 12 $ 12 $ — $ 42 Confirmed obligations outstanding at the December 31, 2022 $ 87 $ 6 $ 19 $ 8 $ 11 $ 5 $ — $ 57 Invoices confirmed during the period 161 22 53 25 28 7 — 79 Confirmed invoices paid during the period (179) (25) (55) (22) (33) (6) — (93) Confirmed obligations outstanding at September 30, 2023 $ 69 $ 3 $ 17 $ 11 $ 6 $ 6 $ — $ 43 NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2023.

Dispositions

Dispositions	9 Months Ended
	Sep. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	DISPOSITIONS 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 EU&I segment. In June 2023, Duke Energy announced that it had entered into a purchase and sale agreement with affiliates of Brookfield for the sale of the utility-scale solar and wind grou p. Duke Energy closed on this transaction on October 25, 2023, for proceeds of $1.1 billion, with approximately half of the proceeds received at closing and th e remainder due 18 months after closing. In July 2023, Duke Energy announced that it had entered into a purchase and sale agreement with affiliates of ArcLight for the distributed generation group. Duke Energy closed on this transaction on October 4, 2023, and received proceeds of $243 million. In March 2023, assets for certain projects were removed from the utility-scale solar and wind group and placed in a separate disposal group. The disposal process for the remaining assets is expected to be completed by early 2024, with net proceeds from the dispositions not anticipated to be material. Assets Held For Sale and Discontinued Operations The utility-scale solar and wind group, the distributed generation group and the remaining assets (collectively, Commercial Renewables Disposal Groups) were classified as held for sale and as discontinued operations in the fourth quarter of 2022. Originally debt and the related restricted cash and interest rate swaps were not expected to transfer to a buyer but during the marketing process it was determined they would be included with the sale and were classified as held for sale in March 2023. As a result, adjustments were made to the December 31, 2022, Consolidated Balance Sheet to present debt and the related restricted cash and interest rate swaps as held for sale. 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. No interest from corporate level debt was allocated to discontinued operations. 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. (in millions) September 30, 2023 December 31, 2022 Current Assets Held for Sale Cash and cash equivalents $ 70 $ 10 Receivables, net 107 107 Inventory 84 88 Other 179 151 Total current assets held for sale 440 356 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 5,387 6,444 Accumulated depreciation and amortization (1,651) (1,651) Net property, plant and equipment 3,736 4,793 Operating lease right-of-use assets, net 144 140 Investments in equity method unconsolidated affiliates 504 522 Other 212 179 Total other noncurrent assets held for sale 860 841 Total Assets Held for Sale $ 5,036 $ 5,990 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 124 $ 122 Taxes accrued 22 17 Current maturities of long-term debt 268 276 Other 175 120 Total current liabilities associated with assets held for sale 589 535 Noncurrent Liabilities Associated with Assets Held for Sale Long-Term debt 1,047 1,188 Operating lease liabilities 154 150 Asset retirement obligations 201 190 Other 232 399 Total other noncurrent liabilities associated with assets held for sale 1,634 1,927 Total Liabilities Associated with Assets Held for Sale $ 2,223 $ 2,462 As of September 30, 2023, and December 31, 2022, the noncontrolling interest balance is $1.8 billion and $1.6 billion, respectively. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in (Loss) Income from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations. Three Months Ended Nine Months Ended September 30, September 30, (in millions) 2023 2022 2023 2022 Operating revenues $ 103 $ 129 $ 293 $ 372 Operation, maintenance and other 93 85 270 248 Depreciation and amortization (a) — 65 — 193 Property and other taxes 8 10 27 31 Other income and expenses, net (2) (1) (9) (4) Interest expense 10 18 53 55 Loss on disposal 169 — 1,603 — Loss before income taxes (179) (50) (1,669) (159) Income tax benefit (27) (30) (353) (106) Loss from discontinued operations $ (152) $ (20) $ (1,316) $ (53) Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations (38) 20 33 92 Net (loss) income from discontinued operations attributable to Duke Energy Corporation $ (190) $ — $ (1,283) $ 39 (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 reflected pretax impairments of approximately $1.7 billion as of December 31, 2022, and an incremental pretax impairment of $220 million as of March 31, 2023. The final purchase and sale agreements were signed with Brookfield in June 2023 for the utility-scale solar and wind group and with ArcLight in July 2023 for the distributed generation group, and accordingly, in the second quarter of 2023, pretax impairments of approximately $1.2 billion were recorded to write-down the carrying amount of property, plant and equipment assets to the estimated fair value of the business, based on the expected selling price less estimated costs to sell. Pretax impairments of $169 million were recorded in the third quarter of 2023 reflecting closing-related adjustments for the transactions that closed and ongoing assessment of the estimated fair values of the remaining assets held for sale. The impairments were included in (Loss) Income from Discontinued Operations, net of tax, in Duke Energy's Condensed Consolidated Statements of Operations and Comprehensive Income for the periods presented. The fair value was primarily determined from purchase and sale agreements for the utility scale and distributed generation groups and discounted cash flow analysis for the remainder of the assets. The discounted cash flow model utilized Level 2 and Level 3 inputs. The fair value hierarchy levels are further discussed in Note 12. The impairments for the utility-scale and distributed generation assets were updated based on customary adjustments at closing, and will be updated, if necessary, for any post-closing adjustments. The carrying amounts for the remaining assets will be updated, if necessary, based on final disposition amounts. 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. Nine Months Ended September 30, (in millions) 2023 2022 Cash flows provided by (used in): Operating activities $ 545 $ 485 Investing activities (597) (223) Other Sale-Related Matters Duke Energy (Parent) and several Duke Energy renewables project companies, located in the ERCOT market, were named in several lawsuits arising out of Texas Storm Uri, which occurred in February 2021. The legal actions related to project companies in this matter transferred to affiliates of Brookfield in conjunction with the transaction closing in October 2023. The plaintiffs have begun to dismiss Duke Energy (parent) from these lawsuits and have represented to the court that they will dismiss Duke Energy (Parent) from all such cases. See Note 5 for more information. As part of the purchase and sale agreement for the distributed generation group, Duke Energy has agreed to retain certain guarantees, with expiration dates between 2029 through 2034, related to tax equity partners' assets and operations that will be disposed of via sale. Duke Energy has obtained certain guarantees from the buyers in regards to future performance obligations to assist in limiting Duke Energy's exposure under the retained guarantees. The fair value of the guarantees is immaterial as Duke Energy does not believe conditions are likely for performance under these guarantees.

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS 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 primarily includes Duke Energy's regulated electric utilities in the Carolinas, Florida and the Midwest. 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. 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, Duke Energy’s wholly owned captive insurance company, Bison, and Duke Energy's ownership interest in National Methanol Company. Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 7,695 $ 291 $ 7,986 $ 8 $ — $ 7,994 Intersegment revenues 20 22 42 25 (67) — Total revenues $ 7,715 $ 313 $ 8,028 $ 33 $ (67) $ 7,994 Segment income (loss) (a) $ 1,447 $ 15 $ 1,462 $ (59) $ — $ 1,403 Less: Noncontrolling interests (69) Add: Preferred stock dividend 39 Discontinued operations (190) Net Income $ 1,321 Segment assets (b) $ 155,588 $ 16,724 $ 172,312 $ 8,848 $ — $ 181,160 Three Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 7,431 $ 404 $ 7,835 $ 7 $ — $ 7,842 Intersegment revenues 8 23 31 23 (54) — Total revenues $ 7,439 $ 427 $ 7,866 $ 30 $ (54) $ 7,842 Segment income (loss) $ 1,540 $ 4 $ 1,544 $ (183) $ (1) $ 1,360 Less: Noncontrolling interests 9 Add: Preferred stock dividend 39 Discontinued operations 23 Net Income $ 1,413 (a) EU&I includes $95 million recorded within Impairment of assets and other charges and $16 million within Operations, maintenance and other on Duke Energy Carolinas' and Duke Energy Progress' Condensed Consolidated Statement of Operations related primarily to Duke Energy Carolinas' North Carolina rate case settlement and Duke Energy Progress' North Carolina rate case order. See Note 4 for additional information. (b) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Nine Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 20,308 $ 1,516 $ 21,824 $ 24 $ — $ 21,848 Intersegment revenues 55 67 122 74 (196) — Total revenues $ 20,363 $ 1,583 $ 21,946 $ 98 $ (196) $ 21,848 Segment income (loss) (a) $ 3,088 $ 327 $ 3,415 $ (388) $ — $ 3,027 Less: Noncontrolling interests (42) Add: Preferred stock dividend 92 Discontinued operations (1,283) Net Income $ 1,878 Nine Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 19,552 $ 1,843 $ 21,395 $ 22 $ — $ 21,417 Intersegment revenues 24 69 93 69 (162) — Total revenues $ 19,576 $ 1,912 $ 21,488 $ 91 $ (162) $ 21,417 Segment income (loss) (b) $ 3,237 $ 277 $ 3,514 $ (480) $ (2) $ 3,032 Less: Noncontrolling interests 73 Add: Preferred stock dividend 92 Discontinued operations 62 Net Income $ 3,113 Duke Energy Ohio Duke Energy Ohio has two reportable segments, EU&I and GU&I. The remainder of Duke Energy Ohio's operations is presented as Other. Three Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 472 $ 105 $ 577 $ — $ — $ 577 Segment income (loss)/Net income $ 65 $ 17 $ 82 $ (2) $ — $ 80 Segment assets $ 7,745 $ 4,218 $ 11,963 $ 10 $ (179) $ 11,794 Three Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 507 $ 121 $ 628 $ — $ 628 Segment income (loss)/Net income $ 74 $ 30 $ 104 $ (1) $ 103 Nine Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 1,411 $ 464 $ 1,875 $ — $ 1,875 Segment income (loss)/Net income $ 168 $ 87 $ 255 $ (4) $ 251 Nine Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 1,320 $ 491 $ 1,811 $ — $ 1,811 Segment income (loss)/Net income $ 152 $ 87 $ 239 $ (3) $ 236

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2023
Regulated Operations [Abstract]
Regulatory Matters	REGULATORY MATTERS 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 Nuclear Statio n 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 September 14, 2023, the NRC posted on its website that the issuance of the GEIS will now be issued in August 2024 instead of May 2024 due to the volume and technical complexity of the comments received. 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 18 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. The NRC has notified Duke Energy Carolinas that the draft EIS will now be issued in January 2024. 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 (ACRS) on February 2, 2023, to discuss issues regarding the SER and SLR application. On February 25, 2023, the ACRS issued a report to the NRC on the safety aspects of the ONS SLR application, which concluded that the established programs and commitments made by Duke Energy Carolinas to manage age-related degradation provide confidence that ONS can be operated in accordance with its current licensing basis for the subsequent period of extended operation without undue risk to the health and safety of the public and the SLR application for ONS should be approved. 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 Carolinas 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 included an MYRP to recover projected capital investments during the three 951. The application as originally filed requested an overall retail revenue increase of $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. T he 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 Carolinas Carbon Plan (Carbon Plan). The Public Staff – North Carolina Utilities Commission ( Public Staff) and intervenor testimony was filed on July 19, 2023, and Duke Energy Carolinas' rebuttal testimony was filed on August 4, 2023. On August 22, 2023, Duke Energy Carolinas filed with the NCUC a partial settlement with the Public Staff in connection with its PBR application. The partial settlement includes, among other things, a greement on a substantial portion of the North Carolina retail rate base for the historic base case of approximately $19.5 billion and all of the capital projects and related costs to be included in the three PIMs, Tracking Metrics and the Residential Decoupling Mechanism under t he PBR application. On August 28, 2023, Duke Energy Carolinas filed with the NCUC a second partial settlement with the Public Staff resolving additional issues, including the future treatment of nuclear production tax credits related to the Inflation Reduction Act, through a stand-alone rider that will provide the benefits to customers beginning January 1, 2025. As a result of the partial settlements, Duke Energy Carolinas recognized pretax charges of $59 million within Impairment of assets and other charges, which primarily related to certain COVID-19 deferred costs, and $8 million within Operations, maintenance and other, for the three and nine months ended September 30, 2023, on the Condensed Consolidated Statements of Operations. These partial settlements are subject to the review and approval of the NCU C. Remaining items litigated at the evidentiary hearing, which occurred August 28 to September 5, 2023, include ROE, capital structure, and recovery of the remaining COVID-19 deferred costs. Duke Energy Carolinas implemented interim rates, subject to refund, on September 1, 2023, and has requested permanent rates be effective by January 1, 2024. On October 13, 2023, the Public Staff filed supplemental testimony, and on October 23, 2023, the NCUC ordered the hearing to reconvene on October 30, 2023. Duke Energy Carolinas expects a decision on its application in this case in the fourth quarter of this year. Duke Energy Carolinas cannot predict the outcome of this matter. Duke Energy Progress 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 included an MYRP to recover projected capital investments during the three The overall retail revenue increase as originally filed would have been $326 million in Year 1, $151 million in Year 2 and $138 million in Year 3, for a combined total of $615 million, by late 2025. The rate increase is driven primarily by major transmission and distribution investments since the last rate case and as projected in the MYRP, as well as investments in energy storage and solar assets included in the MYRP consistent with the Carbon Plan. On April 26, 2023, Duke Energy Progress filed with the NCUC a partial settlement with Public Staff, which included agreement on many aspects of Duke Energy Progress' three he PBR application. On August 18, 2023, the NCUC issued an order approving Duke Energy Progress' PBR Application, as modified by the partial settlements and the order, approving of an overall retail revenue increase of $233 million in Year 1, $126 million in Year 2 and $135 million in Year 3, for a combined total of $494 million. Key aspects of the order include the approval of North Carolina retail rate base for the historic base case of approximately $12.2 billion and capital projects and related costs to be included in the three ID-related costs. Additionally, the Residential Decoupling Mechanism and PIMs were approved as requested under the PBR Application and revised by the partial settlements. As a result of the order, Duke Energy Progress recognized pretax charges of $28 million within Impairment of assets and other charges, which primarily related to certain COVID-19 deferred costs, and $8 million within Operations, maintenance and other, for the three and nine months ended September 30, 2023, on the Condensed Consolidated Statements of Operations. Duke Energy Progress implemented interim rates, subject to refund, on June 1, 2023, and implemented revised Year 1 rates and the residential decoupling on October 1, 2023. On October 17, 2023, CIGFUR and Haywood Electric Membership Corporation each filed a Notice of Appeal and Exceptions to the Supreme Court of North Carolina. Both parties are appealing certain matters that do not impact the overall revenue requirement in the rate case. Specifically, they are appealing the class subsidy reduction percentage, and CIGFUR is also appealing the Customer Assistance Program and the fuel cost allocation methodology. CIGFUR also filed with the NCUC a Motion for Reconsideration and Motion for Stay with respect to those issues during the pendency of the appeal. Duke Energy Progress cannot predict the outcome of this matter. 2023 South Carolina Storm Securitization On May 31, 2023, Duke Energy Progress filed a petition with the PSCSC requesting authorization for the financing of Duke Energy Progress' storm recovery costs in the amount of approximately $171 million, through securitization, due to storm recovery activities required as a result of the following storms: Pax, Ulysses, Matthew, Florence, Michael, Dorian, Izzy and Jasper. On September 8, 2023, Duke Energy Progress filed a comprehensive settlement agreement with all parties on all cost recovery issues raised in the storm securitization proceeding. The evidentiary hearing occurred in early September 2023. On September 20, 2023, the PSCSC approved the comprehensive settlement agreement and on October 13, 2023, the PSCSC issued its financing order. Duke Energy Progress will proceed with structuring, marketing and pricing the storm recovery bonds and then seek PSCSC authorization to issue the bonds in the first half of 2024. Duke Energy Progress cannot predict the outcome of this matter. 2022 South Carolina Rate Case On September 1, 2022, Duke Ener gy 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 on 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). • Acceptance of 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. Duke Energy Florida 2021 Settlement Agreement On January 14, 2021, Duke Energy Florida filed a Settlement Agreement (the “2021 Settlement”) with the FPSC. The parties to the 2021 Settlement include Duke Energy Florida, the Office of Public Counsel (OPC), the Florida Industrial Power Users Group, White Springs Agricultural Chemicals, Inc. d/b/a PCS Phosphate and NUCOR Steel Florida, Inc. (collectively, the “Parties”). Pursuant to the 2021 Settlement, the Parties agreed to a base rate stay-out provision that expires year-end 2024; however, Duke Energy Florida is allowed an increase to its base rates of an incremental $67 million in 2022, $49 million in 2023 and $79 million in 2024, subject to adjustment in the event of tax reform during the years 2021, 2022 and 2023. The Parties also agreed to an ROE band of 8.85% to 10.85% with a midpoint of 9.85% based on a capital structure of 53% equity and 47% debt. The ROE band can be increased by 25 basis points if the average 30-year U.S. Treasury rate increases 50 basis points or more over a six-month period in which case the midpoint ROE would rise from 9.85% to 10.10%. On July 25, 2022, this provision was triggered. Duke Energy Florida filed a petition with the FPSC on August 12, 2022, to increase the ROE effective August 2022 with a base rate increase effective January 1, 2023. The FPSC approved this request on October 4, 2022. The 2021 Settlement Agreement also provided that Duke Energy Florida will be able to retain $173 million of the expected Department of Energy (DOE) award from its lawsuit to recover spent nuclear fuel to mitigate customer rates over the term of the 2021 Settlement. Duke Energy Florida is permitted to recognize the $173 million into earnings through the approved settlement period. Duke Energy Florida settled the DOE lawsuit and received payment of approximately $180 million on June 15, 2022, of which the retail portion was approximately $154 million. The 2021 Settlement authorizes Duke Energy Florida to collect the difference between $173 million and the $154 million retail portion of the amount received through the capacity cost recovery clause. As of September 30, 2023, Duke Energy Florida has recognized $94 million into earnings. The remaining $79 million is expected to be recognized over the remainder of 2023 and 2024, while also remaining within the approved return on equity band. The 2021 Settlement also contained a provision to recover or flow back the effects of tax law changes. As a result of the IRA enacted on August 16, 2022, Duke Energy Florida is eligible for Production Tax Credits (PTCs) associated with solar facilities placed in service beginning in January 2022. Duke Energy Florida filed a petition with the FPSC on October 17, 2022, to reduce base rates effective January 1, 2023, by $56 million to flow back the expected 2023 PTCs and to flow back the expected 2022 PTCs via an adjustment to the capacity cost recovery clause. On December 14, 2022, the FPSC issued an order approving Duke Energy Florida's petition. In addition to these terms, the 2021 Settlement contained provisions related to the accelerated depreciation of Crystal River Units 4-5, the approval of approximately $1 billion in future investments in new cost-effective solar power, the implementation of a new Electric Vehicle Charging Station Program and the deferral and recovery of costs in connection with the implementation of Duke Energy Florida’s Vision Florida program, which explores various emerging non-carbon emitting generation technology, distributed technologies and resiliency projects, among other things. The 2021 Settlement also resolved remaining unrecovered storm costs for Hurricane Michael and Hurricane Dorian. The FPSC approved the 2021 Settlement on May 4, 2021, issuing an order on June 4, 2021. Revised customer rates became effective January 1, 2022, with subsequent base rate increases effective January 1, 2023, and January 1, 2024. Clean Energy Connection On July 1, 2020, Duke Energy Florida petitioned the FPSC for approval of a voluntary solar program. The program consists of 10 new solar generating facilities with combined capacity of approximately 750 MW. The program allows participants to support cost-effective solar development in Florida by paying a subscription fee based on per kilowatt subscriptions and receiving a credit on their bill based on the actual generation associated with their portion of the solar portfolio. The estimated cost of the 10 new solar generation facilities is approximately $1 billion and the projects are expected to be completed by the end of 2024. This investment will be included in base rates offset by the revenue from the subscription fees and the credits will be included for recovery in the fuel cost recovery clause. The FPSC approved the program in January 2021. On February 24, 2021, the League of United Latin American Citizens (LULAC) filed a notice of appeal of the FPSC’s order approving the Clean Energy Connection to the Supreme Court of Florida. The Supreme Court of Florida heard oral arguments in the appeal on February 9, 2022. On May 27, 2022, the Supreme Court of Florida issued an order remanding the case to the FPSC so that the FPSC can amend its order to better address some of the arguments raised by LULAC. On September 23, 2022, the FPSC issued a revised order and submitted it on September 26, 2022, to the Supreme Court of Florida. The Supreme Court of Florida requested that the parties file supplemental briefs regarding the revised order, which were filed February 6, 2023. LULAC has filed a request for Oral Argument on the issues discussed in the supplemental briefs, but the Court has yet to rule on that request. The FPSC approval order remains in effect pending the outcome of the appeal. Duke Energy Florida cannot predict the outcome of this matter. Storm Protection Plan On April 11, 2022, Duke Energy Florida filed a Storm Protection Plan for approval with the FPSC. The plan, which covers investments for the 2023-2032 time frame, reflects approxim ately $7 billion of capital inv estment in transmission and distribution meant to strengthen its infrastructure, reduce outage times associated with extreme weather events, reduce restoration costs and improve ove rall service reliability. The evidentiary hearing began on August 2, 2022. On October 4, 2022, the FPSC voted to approve Duke Energy Florida’s plan with one modification to remove the transmission loop radially fed program, representing a reduction of approximately $80 million over the 10-year period starting in 2025. On December 9, 2022, the OPC filed a notice of appeal of this order to the Florida Supreme Court. The OPC's initial brief was filed on April 18, 2023. Duke Energy Florida filed its brief on July 17, 2023. The OPC's reply brief was filed on October 16, 2023. The OPC has filed a request for oral argument, but the Florida Supreme Court has yet to rule on that request. Duke Energy Florida cannot predict the outcome of this matter. Hurricanes Ian and Idalia On September 28, 2022, much of Duke Energy Florida’s service territory was impacted by Hurricane Ian, which caused significant damage resulting in more than 1.1 million outages. Duke Energy Florida's September 30, 2023, Condensed Consolidated Balance Sheets includes an estimate of approximately $357 million in regulatory assets related to deferred Hurricane Ian storm costs consistent with the FPSC's storm rule. After depleting any existing storm reserves, which were approximately $107 million before Hurricane Ian, Duke Energy Florida is permitted to petition the FPSC for recovery of additional incremental operation and maintenance costs resulting from the storm and to replenish the retail customer storm reserve to approximately $132 million. Duke Energy Florida filed its petition for cost recovery of various storms, including Hurricane Ian, and replenishment of the storm reserve on January 23, 2023, seeking recovery of $442 million, for recovery over 12 months beginning with the first billing cycle in April 2023. On March 7, 2023, the FPSC approved this request for interim recovery, subject to refund, and ordered Duke Energy Florida to file documentation of the total actual storm costs, once known. Duke Energy Florida filed documentation evidencing its total actual storm costs of $431 million on September 29, 2023. Duke Energy Ohio Duke Energy Ohio Electric Base Rate Case Duke Energy Ohio filed with the PUCO an electric distribution base rate case application on October 1, 2021, with supporting testimony filed on October 15, 2021, requesting an increase in electric distribution base rates of approximately $55 million and an ROE of 10.3%. On September 19, 2022, Duke Energy Ohio filed a Stipulation and Recommendation with the PUCO, which includes an increase in overall electric distribution base rates of approximately $23 million and an ROE of 9.5%. The stipulation is among all but one party to the proceeding. The PUCO issued an order on December 14, 2022, approving the Stipulation without material modification. Rates went into effect on January 3, 2023. The OCC filed an application for rehearing on January 13, 2023, arguing the Stipulation was unreasonable, discriminatory, and denied OCC due process. On February 8, 2023, the PUCO granted the OCC's application for rehearing for further consideration. Duke Energy Ohio cannot predict the outcome of this matter. Energy Efficiency Cost Recovery In response to changes in Ohio law that eliminated Ohio's energy efficiency mandates, the PUCO issued an order on February 26, 2020, directing utilities to wind down their demand-side management programs by September 30, 2020, and to terminate the programs by December 31, 2020. Duke Energy Ohio took the following actions: • On March 27, 2020, Duke Energy Ohio filed an application for rehearing seeking clarification on the final true up and reconciliation process after 2020. On November 18, 2020, the PUCO issued an order replacing the cost cap previously imposed upon Duke Energy Ohio with a cap on shared savings recovery. On December 18, 2020, Duke Energy Ohio filed an additional application for rehearing challenging, among other things, the imposition of the cap on shared savings. On January 13, 2021, the application for rehearing was granted for further consideration. • On October 9, 2020, Duke Energy Ohio filed an application to implement a voluntary energy efficiency program portfolio to commence on January 1, 2021. The application proposed a mechanism for recovery of program costs and a benefit associated with avoided transmission and distribution costs. • On November 18, 2020, the PUCO issued an order directing all utilities to set their energy efficiency riders to zero effective January 1, 2021, and to file a separate application for final reconciliation of all energy efficiency costs prior to December 31, 2020. Effective January 1, 2021, Duke Energy Ohio suspended its energy efficiency programs. • On June 14, 2021, the PUCO requested each utility to file by July 15, 2021, a proposal to reestablish low-income programs through December 31, 2021. Duke Energy Ohio filed its application on July 14, 2021. • On February 23, 2022, the PUCO issued its Fifth Entry on Rehearing that 1) affirmed its reduction in Duke Energy Ohio's shared savings cap; 2) denied rehearing/clarification regarding lost distribution revenues and shared savings recovery for periods after December 31, 2020; and 3) directed Duke Energy Ohio to submit an updated application with exhibits. On March 25, 2022, Duke Energy Ohio filed its Amended Application consistent with the PUCO's order. • On March 17, 2023, the Staff of the PUCO submitted its Staff Review and Recommendation. This Staff Report, like prior such reports, recommends certain disallowances related to incentives. • On March 27, 2023, the PUCO established a procedural sche dule. Intervention/comments were filed on April 26, 2023, an d Duke Energy Ohio filed reply comments on May 11, 2023. On August 9, 2023, the PUCO issued its decision approving the Company’s request for recovery and final true up of energy efficiency program costs, lost distribution revenues and performance incentives from calendar years 2018 through 2020, resulting in $14 million of Regulated electric revenue on the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2023, and resolving all outstanding issues in these proceedings. Rates were revised effective September 1, 2023. Duke Energy Ohio Natural Gas Base Rate Case Duke Energy Ohio filed with the PUCO a natural gas base rate case application on June 30, 2022, with supporting testimony filed on July 14, 2022, requesting an increase in natural gas base rates of approximately $49 million and an ROE of 10.3%. This is an approximate 5.6% average increase in the customer's total bill across all customer classes. The drivers for this case are capital invested since Duke Energy Ohio's last natural gas base rate case in 2012. Duke Energy Ohio is also seeking to adjust the caps on its CEP rider. The report of the Staff of the PUCO was issued on December 21, 2022, recommending an increase in natural gas base rates of $24 million to $36 million, with an equity ratio of 52.32% and an ROE range of 9.03% to 10.04%. On April 28, 2023, Duke Energy Ohio filed a stipulation with all parties to the case except the OCC. In the stipulation, the parties agreed to approximately $32 million in revenue increases with an equity ratio of 52.32% and an ROE of 9.6%, and adjustments to the CEP Rider caps. The stipulation was opposed by the OCC at an evidentiary hearing that concluded on May 24, 2023. Initial briefs were filed June 16, 2023, and reply briefs were filed on July 14, 2023. On November 1, 2023, PUCO issued an order approving the stipulation as filed. New rates went into effect November 1, 2023. Duke Energy Ohio cannot predict the outcome of this matter. Duke Energy Kentucky Electric Base Rate Case On December 1, 2022, Duke Energy Kentucky filed a rate case with the KPSC requesting an annualized increase in electric base rates of approximately $75 million and an ROE of 10.35%. This is an overall increase in rates of approximately 17.8%. The request for rate increase is driven by capital investments to strengthen the electricity generation and delivery systems along with adjusted depreciation rates for the East Bend and Woodsdale Combustion Turbine (CT) generation stations. Duke Energy Kentucky is also requesting approval for new programs for the benefit of customers and tariff updates, including a voluntary community-based renewable subscription program and two electric vehicle charging programs. Intervenor testimony was filed March 10, 2023, and rebuttal testimony was filed April 14, 2023. The Kentucky Attorney General recommended an increase of $31 million and an ROE of 9.55%. An evidentiary hearing concluded on May 11, 2023, with simultaneous briefs filed June 9, 2023, and replies filed on June 19, 2023. The KPSC issued an order on October 12, 2023, including a $48 million increase in base revenues, an ROE of 9.75% for electric base rates and 9.65% for electric riders and an equity ratio of 52.145%. The Company's request to align the depreciation rates of East Bend with a 2035 retirement date was denied and the KPSC ordered depreciation rates with a 2041 retirement date for the unit. The KPSC did approve the request to align the depreciation rates of Woodsdale CT with a 2040 retirement date and denied the voluntary community-based renewable subscription program and the two electric vehicle charging programs. On November 1, 2023, Duke Energy Kentucky filed for rehearing requesting certain matters be reconsidered by the KPSC. Duke Energy Kentucky cannot predict the outcome of this matter. Duke Energy Indiana 2019 Indiana Rate Case On July 2, 2019, Duke Energy Indiana filed a general rate case with the IURC for a rate increase for retail customers of approximately $395 million. The rebuttal case, filed on December 4, 2019, updated the requested revenue requirement to result in a 15.6%, or $396 million, average retail rate increase, including the impacts of the utility receipts tax. On June 29, 2020, the IURC issued an order in the rate case approving a revenue increase of $146 million before certain adjustments and ratemaking refinements. The order approved Duke Energy Indiana’s requested forecasted rate base of $10.2 billion as of December 31, 2020, including the Edwardsport Integrated Gasification Combined Cycle (IGCC) Plant. The IURC reduced Duke Energy Indiana’s request by slightly more than $200 million, when accounting for the utility receipts tax and other adjustments. Approximately 50% of the reduction was due to a prospective change in depreciation and use of regulatory asset for the end-of-life inventory at retired generating plants, approximately 20% was due to the approved ROE of 9.7% versus the requested ROE of 10.4% and approximately 20% was related to miscellaneous earnings neutral adjustments. Step one rates were estimated to be approximately 75% of the total and became effective on July 30, 2020. Step two rates estimated to be the remaining 25% of the total rate increase were approved on July 28, 2021, and implemented in August 2021. Several groups appealed the IURC order to the Indiana Court of Appeals. The Indiana Court of Appeals affirmed the IURC decision on May 13, 2021. However, upon appeal by the Indiana Office of Utility Consumer Counselor (OUCC) and the Duke Industrial Group on March 10, 2022, the Indiana Supreme Court found that the IURC erred in allowing Duke Energy Indiana to recover coal ash costs incurred before the IURC’s rate case order in June 2020. The Indiana Supreme Court found that allowing Duke Energy Indiana to recover coal ash costs incurred between rate cases that exceeded the amount built into base rates violated the prohibition against retroactive ratemaking. The IURC’s order has been remanded to the IURC for additional proceedings consistent with the Indiana Supreme Court’s opinion. As a result of the court's opinion, Duke Energy Indiana recognized pretax charges of approximately $211 million to Impairment of assets and other charges and $46 million to Operating revenues in the Condensed Consolidated Statements of Operations for the three months ended March 31, 2022 . D uke Energy Indiana filed a request for rehearing with the Supreme Court on April 11, 2022, which the court denied on May 26, 2022. Duke Energy Indiana filed its testimony in the remand proceeding on August 18, 2022 . On February 3, 2023, Duke Energy

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES 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 Duke Energy Registrants. Remediation Activities In addition to AROs recorded as a result of various environmental regulations, 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 on 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 on the Condensed 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 on the Condensed Consolidated Balance Sheets. (in millions) September 30, 2023 December 31, 2022 Reserves for Environmental Remediation Duke Energy $ 90 $ 84 Duke Energy Carolinas 24 22 Progress Energy 20 19 Duke Energy Progress 10 8 Duke Energy Florida 10 11 Duke Energy Ohio 36 33 Duke Energy Indiana 2 3 Piedmont 7 7 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 D uke Energy Texas Storm Uri Tort Litigation Duke Energy (Parent), several Duke Energy renewables project companies , and others in the ERCOT market were named in multiple lawsuits arising out of Texas Storm Uri, which occurred in February 2021. These lawsuits seek recovery for property damages, personal injury and wrongful death allegedly caused by the power outages that plaintiffs claim were the collective failure of generators, transmission and distribution operators (TDUs), retail energy providers, and all others, including ERCOT. The cases were consolidated into a Texas state court multidistrict litigation (MDL) proceeding for discovery and pre-trial motions. Five MDL cases were designated as lead cases in which motions to dismiss were filed and all other cases were stayed. On January 28, 2023, the Court denied certain motions including those by the generator defendants and TDUs and granted others. The generators and TDUs filed petitions for Writ of Mandamus to the Texas Court of Appeals seeking to overturn the denials. The TDUs' petition, filed first, was accepted and oral argument was held on October 23, 2023. The parties await a ruling from the court. T he generators’ petition has not yet been set for argument. After the rulings on the motions to dismiss, plaintiffs filed new lawsuits against Duke Energy (Parent), Duke Energy Renewables, LLC, and several Duke Energy renewable entities, which are included in the M DL proceeding and are currently stayed. The plaintiffs have begun to dismiss Duke Energy (Parent) from these lawsuits and have represented to the court that they will dismiss Duke Energy (Parent) from all such cases. Duk e Energy cannot predict the outcome of this matter. See Note 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, did not adequately warn about the dam, and created a dangerous and hidden hazard on the Dan River by building and maintaining the low-head dam. Duke Energy Carolinas reached an agreement that resolved this matter. The resolution, which did not have a material financial impact, was approved by the Durham County Superior Court. The case was dismissed on June 6, 2023. 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 a 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. On April 6, 2023, Duke Energy Carolinas received notice from the FERC Office of Enforcement that they have closed their non-public investigation with no further action recommended. 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 was completed on June 30, 2023. The oral argument has been scheduled for t December 7, 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 Caroli nas has recognized asbestos-related reserves of $436 million at September 30, 2023, and $457 million at December 31, 2022. These reserves are classified in Other within Other Noncurrent Liabilities and Other within Current Liabilities on the Condensed Consolidated Balance Sheets. These reserves are based on Duke Energy Carolinas' best estimate for current and future asbestos claims through 2043 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 2043 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 $572 million at September 30, 2023, a nd $595 million at December 31, 2022. These amounts are classified in Other within Other Noncurrent Assets and Receivables within Current Assets on the Condensed 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 is $9 million and $12 million for Duke Energy and Duke Energy Carolinas as of September 30, 2023, and December 31, 2022, respectively. 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 Indiana 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. On June 30, 2023, Duke Energy Indiana and Associated Electric and Gas Insurance Services (AEGIS) reached a confidential settlement, the results of which were not material, and as a result, AEGIS was dismissed from the litiga tio n on July 13, 2023. The lawsuit remains pending as to the other insurers, but is stayed until Decem ber 31, 2023, to allow for further settlement negotiations. 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. Reserves are classified on the Condensed 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 Condensed 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. In addition, the Duke Energy Registrants enter into various fixed-price, noncancelable commitments to purchase or sell power or natural gas, take-or-pay arrangements, transportation, or throughput agreements and other contracts that may or may not be recognized on their respective Condensed Consolidated Balance Sheets. Some of these arrangements may be recognized at fair value on their respective Condensed Consolidated Balance Sheets if such contracts meet the definition of a derivative and the NPNS exception does not apply. In most cases, the Duke Energy Registrants’ purchase obligation contracts contain provisions for price adjustments, minimum purchase levels and other financial commitments.

Debt and Credit Facilities

Debt and Credit Facilities	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Debt and Credit Facilities	DEBT AND CREDIT FACILITIESDebt related to the Commercial Renewables Disposal Groups is now classified as held for sale and is excluded from the following disclosures. See Note 2 for further information. SUMMARY OF SIGNIFICANT DEBT ISSUANCES The following table summarizes significant debt issuances (in millions). Nine Months Ended September 30, 2023 Duke Duke Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Unsecured Debt April 2023 (a) April 2026 4.125 % $ 1,725 $ 1,725 $ — $ — $ — $ — $ — $ — June 2023 (b) June 2033 5.400 % 350 — — — — — — 350 September 2023 (c) September 2033 5.750 % 600 600 — — — — — — September 2023 (c) September 2053 6.100 % 750 750 — — — — — — First Mortgage Bonds January 2023 (d) January 2033 4.950 % 900 — 900 — — — — — January 2023 (d) January 2053 5.350 % 900 — 900 — — — — — March 2023 (e) March 2033 5.250 % 500 — — 500 — — — — March 2023 (e) March 2053 5.350 % 500 — — 500 — — — — March 2023 (f) April 2033 5.250 % 375 — — — — 375 — — March 2023 (f) April 2053 5.650 % 375 — — — — 375 — — March 2023 (g) April 2053 5.400 % 500 — — — — — 500 — June 2023 (h) January 2033 4.950 % 350 — 350 — — — — — June 2023 (h) January 2054 5.400 % 500 — 500 — — — — — September 2023 (i) October 2073 4.960 % 200 — — — 200 — — — Total issuances $ 8,525 $ 3,075 $ 2,650 $ 1,000 $ 200 $ 750 $ 500 $ 350 (a) See "Duke Energy (Parent) Convertible Senior Notes" below for additional information. (b) Proceeds will be used to repay $45 million of maturities due October 2023, to pay down a portion of short-term debt and for general corporate purposes. (c) Proceeds were primarily used to repay $400 million of maturities due October 2023, to pay down a portion of short-term debt and for general corporate purposes. (d) Proceeds were used to repay $1 billion of maturities due March 2023, to pay down a portion of short-term debt and for general company purposes. (e) Proceeds will be used to repay $300 million of maturities due September 2023, to pay down a portion of short-term debt and for general company purposes. (f) Proceeds will be used to repay $300 million of maturities due September 2023 and a portion of the $100 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general corporate purposes. (g) Proceeds were used to repay the $300 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general company purposes. (h) Proceeds were used to pay down a portion of short-term debt and for general company purposes. (i) Proceeds were used to pay down a portion of short-term debt and for general company purposes. Duke Energy (Parent) Convertible Senior Notes In April 2023, Duke Energy (Parent) completed the sale of $1.7 billion 4.125% Convertible Senior Notes due April 2026 (convertible notes). The convertible notes are senior unsecured obligations of Duke Energy, and will mature on April 15, 2026, unless earlier converted or repurchased in accordance with their terms. The convertible notes bear interest at a fixed rate of 4.125% per year, payable semiannually in arrears on April 15 and October 15 of each year, beginning on October 15, 2023. Proceeds were used to repay a portion of outstanding commercial paper and for general corporate purposes. Prior to the close of business on the business day immediately preceding January 15, 2026, the convertible notes will be convertible at the option of the holders when the following conditions are met: • during any calendar quarter commencing after the calendar quarter ending on June 30, 2023, (and only during such calendar quarter) if the last reported sale price of Duke Energy common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; • during the five consecutive business day period after any 10 consecutive trading day period (the measurement period) in which the trading price, as defined, per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of Duke Energy common stock and the conversion rate on each such trading day; or • upon the occurrence of specified corporate events described in the indenture agreement. On or after January 15, 2026, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the convertible notes may convert all or any portion of their convertible notes at their option at any time at the conversion rate then in effect, irrespective of these conditions. Duke Energy will settle conversions of the convertible notes by paying cash up to the aggregate principal amount of the convertible notes to be converted and paying or delivering, as the case may be, cash, shares of Duke Energy's common stock, $0.001 par value per share, or a combination of cash and shares of its common stock, at its election, in respect of the remainder, if any, of its conversion obligation in excess of the aggregate principal amount of the convertible notes being converted. The conversion rate for the convertible notes is initially 8.4131 shares of Duke Energy's common stock per $1,000 principal amount of convertible notes. The initial conversion price of the convertible notes represents a premium of approximately 25% over the last reported sale price of Duke Energy’s common stock on the NYSE on April 3, 2023. The conversion rate and the corresponding conversion price will not be adjusted for any accrued and unpaid interest but will be subject to adjustment in some instances, such as stock splits or share combinations, certain distributions to common stockholders, or tender offers at off-market rates. The changes in the conversion rates are intended to make convertible note holders whole for changes in the fair value of Duke Energy common stock resulting from such events. Duke Energy may not redeem the convertible notes prior to the maturity date. Duke Energy issued the convertible notes pursuant to an indenture, dated as of April 6, 2023, by and between Duke Energy and The Bank of New York Mellon Trust Company, N.A., as trustee. The terms of the convertible notes include customary fundamental change provisions that require repayment of the notes with interest upon certain events, such as a stockholder approved plan of liquidation or if Duke Energy's common stock ceases to be listed on the NYSE. CURRENT MATURITIES OF LONG-TERM DEBT The following table shows the significant components of Current maturities of long-term debt on the Condensed 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 September 30, 2023 Unsecured Debt Duke Energy Ohio (a) October 2023 5.813 % $ 150 Duke Energy (Parent) October 2023 3.950 % 400 Duke Energy (Parent) Term Loan Facility (a) March 2024 6.048 % 1,000 Duke Energy (Parent) April 2024 3.750 % 1,000 Duke Energy Florida (a) April 2024 6.196 % 800 Other (b) 684 Current maturities of long-term debt $ 4,034 (a) Debt has a floating interest rate. In October 2023, Duke Energy Kentucky's $50 million two (b) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities. AVAILABLE CREDIT FACILITIES Master Credit Facility In March 2023, Duke Energy amended its existing Master Credit Facility of $9 billion to extend the termination date to March 2028. 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. An amendment in conjunction with the issuance of the Convertible Senior Notes due April 2026 clarifies that payments due as a result of a conversion of a convertible note would not constitute an event of default. The table below includes the current borrowing sublimits and available capacity under these credit facilities. September 30, 2023 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 $ 2,275 $ 1,575 $ 1,400 $ 1,250 $ 750 $ 950 $ 800 Reduction to backstop issuances Commercial paper (b) (2,815) (106) (631) (841) (292) (298) (350) (297) Outstanding letters of credit (39) (27) (4) (1) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 6,065 $ 2,142 $ 940 $ 558 $ 951 $ 452 $ 519 $ 503 (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 on the Condensed Consolidated Balance Sheets. Other Credit Facilities Duke Energy (Parent) Term Loan Facility In March 2022, Duke Energy (Parent) entered into a Term Loan Credit Agreement (Credit Agreement) with commitments totaling $1.4 billion maturing March 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. The balance is classified as Current maturities of long-term debt on Duke Energy's Condensed Consolidated Balance Sheets. In March 2023, Duke Energy amended its existing Credit Agreement in conjunction with the issuance of the Convertible Senior Notes due April 2026 to clarify that payments due as a result of a conversion of a convertible note would not constitute an event of default.

Asset Retirement Obligations

Asset Retirement Obligations	9 Months Ended
	Sep. 30, 2023
Asset Retirement Obligation [Abstract]
Asset Retirement Obligations	ASSET RETIREMENT OBLIGATIONS The Duke Energy Registrants record AROs when there is a legal obligation to incur retirement costs associated with the retirement of a long-lived asset and the obligation can be reasonably estimated. Actual costs incurred could be materially different from current estimates that form the basis of the recorded AROs. The following table presents the AROs recorded on the Condensed Consolidated Balance Sheets. September 30, 2023 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) $ 7,459 $ 3,136 $ 4,295 $ 4,069 $ 226 $ — $ — $ — Closure of ash impoundments 4,474 2,065 1,530 1,509 21 77 801 — Other 300 67 105 44 61 61 41 28 Total ARO $ 12,233 $ 5,268 $ 5,930 $ 5,622 $ 308 $ 138 $ 842 $ 28 Less: Current portion 620 238 261 260 1 8 114 — Total noncurrent ARO $ 11,613 $ 5,030 $ 5,669 $ 5,362 $ 307 $ 130 $ 728 $ 28 (a) Duke Energy amount includes purchase accounting adjustments related to the merger with Progress Energy. ARO Liability Rollforward The following table presents the change in liability associated with AROs for the Duke Energy Registrants. 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, 2022 (a) $ 12,728 $ 5,382 $ 6,181 $ 5,823 $ 358 $ 154 $ 951 $ 26 Accretion expense (b) 391 189 178 169 9 5 24 2 Liabilities settled (c) (494) (171) (247) (196) (51) (11) (66) — Revisions in estimates of cash flows (d) (392) (132) (182) (174) (8) (10) (67) — Balance at September 30, 2023 $ 12,233 $ 5,268 $ 5,930 $ 5,622 $ 308 $ 138 $ 842 $ 28 (a) Primarily relates to decommissioning nuclear power facilities, closure of ash impoundments, asbestos removal, closure of landfills at fossil generation facilities, retirement of natural gas mains and removal of renewable energy generation assets. (b) For the nine months ended September 30, 2023, substantially all accretion expense relates to Duke Energy's regulated operations and has been deferred in accordance with regulatory accounting treatment. (c) Primarily relates to ash impoundment closures and nuclear decommissioning. (d) The amounts recorded represent the discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The decreases primarily relate to lower unit costs associated with basin closure, routine maintenance and beneficiation activities, as well as a reduction in monitoring wells needed.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	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 Condensed Consolidated Balance Sheets at September 30, 2023, and December 31, 2022. 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 Condensed Consolidated Balance Sheets at September 30, 2023, and December 31, 2022. 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. 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 the third quarter of 2023.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS The Subsidiary Registrants engage in related party transactions in accordance with applicable state and federal commission regulations. Refer to the Condensed 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 on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2023 2022 2023 2022 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 198 $ 193 $ 586 $ 590 Indemnification coverages (b) 9 7 26 21 Joint Dispatch Agreement (JDA) revenue (c) 5 16 26 54 JDA expense (c) 58 210 121 477 Intercompany natural gas purchases (d) 5 5 14 14 Progress Energy Corporate governance and shared service expenses (a) $ 172 $ 188 $ 522 $ 568 Indemnification coverages (b) 11 10 35 32 JDA revenue (c) 58 210 121 477 JDA expense (c) 5 16 26 54 Intercompany natural gas purchases (d) 19 19 56 57 Duke Energy Progress Corporate governance and shared service expenses (a) $ 103 $ 111 $ 314 $ 338 Indemnification coverages (b) 5 5 15 15 JDA revenue (c) 58 210 121 477 JDA expense (c) 5 16 26 54 Intercompany natural gas purchases (d) 19 19 56 57 Duke Energy Florida Corporate governance and shared service expenses (a) $ 69 $ 77 $ 208 $ 230 Indemnification coverages (b) 6 5 20 17 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 73 $ 87 $ 222 $ 251 Indemnification coverages (b) 1 2 4 4 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 92 $ 115 $ 275 $ 330 Indemnification coverages (b) 2 2 6 6 Piedmont Corporate governance and shared service expenses (a) $ 32 $ 37 $ 107 $ 109 Indemnification coverages (b) 1 1 3 2 Intercompany natural gas sales (d) 24 24 70 71 Natural gas storage and transportation costs (e) 6 6 18 17 (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 and Impairment of assets and other charges on the Condensed 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 Condensed 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 Condensed 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 Condensed Consolidated Statements of Operations and Comprehensive Income. (e) Piedmont has related party transactions as a customer of its equity method investments in Pine Needle LNG Company, LLC, Hardy Storage Company, LLC and Cardinal Pipeline Company, LLC natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Condensed 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, such as pipeline lease arrangements, and their proportionate share of certain charged expenses. These transactions of the Subsidiary Registrants are incurred in the ordinary course of business and are eliminated in consolidation. As discussed in Note 13, 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 September 30, 2023 Intercompany income tax receivable $ — $ — $ — $ — $ — $ — $ 24 Intercompany income tax payable 72 138 114 110 18 20 — December 31, 2022 Intercompany income tax receivable $ — $ 95 $ 36 $ 17 $ — $ — $ — Intercompany income tax payable 37 — — — 17 18 38

Derivatives and Hedging

Derivatives and Hedging	9 Months Ended
	Sep. 30, 2023
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 now classified as held for sale and are excluded from 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 o n the Condensed Consolidated Balance Sheets. Cash collateral related to derivative instruments ex ecuted under master netting arrangements is offset against the collateralized derivatives on the Condensed Consolidated Balance Sheets. The cash impacts of settled derivatives are recorded as operating activities or financing activities on the Condensed Consolidated Statements of Cash Flows consistent with the classification of the hedged transaction. 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. Gains and losses reclassified out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2023, and 2022, 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 Condensed Consolidated Statements of Operations and Comprehensive Income. The following tables show notional amounts of outstanding derivatives related to interest rate risk. September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 1,875 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,477 650 1,500 500 1,000 300 27 Total notional amount $ 4,352 $ 650 $ 1,500 $ 500 $ 1,000 $ 300 $ 27 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 2,377 1,250 800 500 300 300 27 Total notional amount $ 2,877 $ 1,250 $ 800 $ 500 $ 300 $ 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 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. 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. September 30, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 20,961 — — — 2,550 18,411 — Natural gas (millions of dekatherms) 841 276 272 272 — 21 272 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 dekatherms) 909 307 292 292 — 11 299 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 at September 30, 2023. Fair Value Loss (a) (in millions) Pay Notional Receive Notional Receive Hedge Three Months Ended September 30, Nine Months Ended September 30, (in millions) Pay Rate (in millions) Rate Maturity Date 2023 2022 2023 2022 Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ (20) $ (41) $ (10) $ (57) 537 5.31 % 500 euros 3.85 % June 2034 (17) (34) (9) (47) Total notional amount $ 1,182 1,100 euros $ (37) $ (75) $ (19) $ (104) (a) Amounts are recorded in Other Income and expenses, net on the Condensed Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Condensed 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 CONDENSED 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 Condensed 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 September 30, 2023 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 $ 57 $ 11 $ 14 $ 9 $ 5 $ 2 $ 28 $ 1 Noncurrent 86 40 46 46 — — — — Total Derivative Assets – Commodity Contracts $ 143 $ 51 $ 60 $ 55 $ 5 $ 2 $ 28 $ 1 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 177 — — — — — — — Not Designated as Hedging Instruments Current 104 26 78 — 78 — — — Noncurrent 101 16 58 24 34 — 27 — Total Derivative Assets – Interest Rate Contracts $ 382 $ 42 $ 136 $ 24 $ 112 $ — $ 27 $ — Total Derivative Assets $ 525 $ 93 $ 196 $ 79 $ 117 $ 2 $ 55 $ 1 Derivative Liabilities September 30, 2023 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 $ 275 $ 156 $ 97 $ 97 $ — $ — $ 4 $ 18 Noncurrent 215 48 40 40 — — — 127 Total Derivative Liabilities – Commodity Contracts $ 490 $ 204 $ 137 $ 137 $ — $ — $ 4 $ 145 Interest Rate Contracts Not Designated as Hedging Instruments Noncurrent 1 — — — — 1 — — Total Derivative Liabilities – Interest Rate Contracts $ 1 $ — $ — $ — $ — $ 1 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 11 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 29 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 520 $ 204 $ 137 $ 137 $ — $ 1 $ 4 $ 145 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 $ 216 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets – Interest Rate Contracts $ 317 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets $ 795 $ 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 – Equity Securities Contracts $ 58 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 437 $ 127 $ 66 $ 48 $ 19 $ 2 $ 16 $ 168 OFFSETTING ASSETS AND LIABILITIES The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. 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 September 30, 2023 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 $ 161 $ 37 $ 92 $ 9 $ 83 $ 2 $ 28 $ 1 Offset (17) (9) (8) (8) — — — — Net amounts presented in Current Assets: Other $ 144 $ 28 $ 84 $ 1 $ 83 $ 2 $ 28 $ 1 Noncurrent Gross amounts recognized $ 364 $ 56 $ 104 $ 70 $ 34 $ — $ 27 $ — Offset (60) (32) (28) (28) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 304 $ 24 $ 76 $ 42 $ 34 $ — $ 27 $ — Derivative Liabilities September 30, 2023 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 $ 293 $ 156 $ 97 $ 97 $ — $ — $ 4 $ 18 Offset (17) (9) (8) (8) — — — — Cash collateral posted (16) (12) (1) (1) — — (4) — Net amounts presented in Current Liabilities: Other $ 260 $ 135 $ 88 $ 88 $ — $ — $ — $ 18 Noncurrent Gross amounts recognized $ 227 $ 48 $ 40 $ 40 $ — $ 1 $ — $ 127 Offset (60) (33) (28) (28) — — — — Cash collateral posted $ (8) $ (7) $ (1) $ (1) $ — $ — $ — $ — Net amounts presented in Other Noncurrent Liabilities: Other $ 159 $ 8 $ 11 $ 11 $ — $ 1 $ — $ 127 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 $ 582 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Offset (33) (15) (18) (18) — — — — Cash collateral received (31) (18) (12) (12) — — — — Net amounts presented in Current Assets: Other $ 518 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 213 $ 104 $ 108 $ 108 $ — $ — $ — $ — Offset (59) (29) (30) (30) — — — — Cash collateral received (38) (11) (27) (27) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 116 $ 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 Offset (33) (15) (18) (18) — — — — Cash collateral posted (16) — — — — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141 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. September 30, 2023 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 312 $ 175 $ 138 $ 138 Fair value of collateral already posted 21 19 2 2 Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 291 $ 156 $ 136 $ 136 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 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	9 Months Ended
	Sep. 30, 2023
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 Available for Sale (AFS) and investments in equity securities as fair value through net income (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 guidelines 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 September 30, 2023, and December 31, 2022. Other Investments amounts are recorded in Other within Other Noncurrent Assets on the Condensed 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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 160 $ — $ — $ 215 Equity securities 4,218 44 6,530 3,658 105 5,871 Corporate debt securities — 80 612 1 85 641 Municipal bonds — 41 318 — 39 330 U.S. government bonds — 136 1,470 2 112 1,423 Other debt securities — 18 169 — 18 156 Total NDTF Investments $ 4,218 $ 319 $ 9,259 $ 3,661 $ 359 $ 8,636 Other Investments Cash and cash equivalents $ — $ — $ 36 $ — $ — $ 22 Equity securities 26 9 141 21 16 128 Corporate debt securities — 10 83 — 12 84 Municipal bonds — 3 74 — 3 78 U.S. government bonds — 5 46 — 2 62 Other debt securities — 5 52 — 3 41 Total Other Investments $ 26 $ 32 $ 432 $ 21 $ 36 $ 415 Total Investments $ 4,244 $ 351 $ 9,691 $ 3,682 $ 395 $ 9,051 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 61 $ 25 $ 107 $ 170 Realized losses 35 61 117 247 AFS: Realized gains 16 7 37 22 Realized losses 45 40 104 105 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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 59 $ — $ — $ 117 Equity securities 2,468 25 3,767 2,147 51 3,367 Corporate debt securities — 60 376 1 62 401 Municipal bonds — 9 45 — 10 64 U.S. government bonds — 73 745 1 51 685 Other debt securities — 18 163 — 18 148 Total NDTF Investments $ 2,468 $ 185 $ 5,155 $ 2,149 $ 192 $ 4,782 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 43 $ 16 $ 70 $ 109 Realized losses 17 39 64 143 AFS: Realized gains 12 7 21 19 Realized losses 26 20 54 57 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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 101 $ — $ — $ 98 Equity securities 1,750 19 2,763 1,511 54 2,504 Corporate debt securities — 20 236 — 23 240 Municipal bonds — 32 273 — 29 266 U.S. government bonds — 63 725 1 61 738 Other debt securities — — 6 — — 8 Total NDTF Investments $ 1,750 $ 134 $ 4,104 $ 1,512 $ 167 $ 3,854 Other Investments Cash and cash equivalents $ — $ — $ 8 $ — $ — $ 11 Municipal bonds — — 23 — — 25 Total Other Investments $ — $ — $ 31 $ — $ — $ 36 Total Investments $ 1,750 $ 134 $ 4,135 $ 1,512 $ 167 $ 3,890 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 18 $ 9 $ 37 $ 61 Realized losses 18 22 53 104 AFS: Realized gains 4 — 16 3 Realized losses 19 9 50 32 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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 62 $ — $ — $ 56 Equity securities 1,661 19 2,663 1,431 54 2,411 Corporate debt securities — 19 224 — 22 230 Municipal bonds — 32 273 — 29 266 U.S. government bonds — 43 469 1 37 460 Other debt securities — — 5 — — 7 Total NDTF Investments $ 1,661 $ 113 $ 3,696 $ 1,432 $ 142 $ 3,430 Other Investments Cash and cash equivalents $ — $ — $ 4 $ — $ — $ 9 Total Other Investments $ — $ — $ 4 $ — $ — $ 9 Total Investments $ 1,661 $ 113 $ 3,700 $ 1,432 $ 142 $ 3,439 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 15 $ 9 $ 34 $ 60 Realized losses 18 21 52 101 AFS: Realized gains 4 — 15 3 Realized losses 18 9 47 29 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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 39 $ — $ — $ 42 Equity securities 89 — 100 80 — 93 Corporate debt securities — 1 12 — 1 10 U.S. government bonds — 20 256 — 24 278 Other debt securities — — 1 — — 1 Total NDTF Investments (a) $ 89 $ 21 $ 408 $ 80 $ 25 $ 424 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 1 Municipal bonds — — 23 — — 25 Total Other Investments $ — $ — $ 24 $ — $ — $ 26 Total Investments $ 89 $ 21 $ 432 $ 80 $ 25 $ 450 (a) During the nine months ended September 30, 2023, and the year ended December 31, 2022, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of 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 three and nine months ended September 30, 2023, and 2022, were immaterial. 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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Cash and cash equivalents $ — $ — $ 3 $ — $ — $ 1 Equity securities 3 9 88 2 16 79 Corporate debt securities — — 9 — 1 8 Municipal bonds — 3 44 — 3 45 U.S. government bonds — — 6 — — 7 Total Investments $ 3 $ 12 $ 150 $ 2 $ 20 $ 140 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and nine months ended September 30, 2023, and 2022, were immaterial. DEBT SECURITY MATURITIES The table below summarizes the maturity date for debt securities. September 30, 2023 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 $ 109 $ 21 $ 88 $ 7 Due after one through five years 671 209 388 235 153 19 Due after five through 10 years 545 311 197 184 13 10 Due after 10 years 1,471 802 569 531 38 23 Total $ 2,824 $ 1,329 $ 1,263 $ 971 $ 292 $ 59

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2023
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 certain 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 now classified as held for sale and are excluded from the following disclosures. See Note 2 for further information. Foreign currency derivatives Most over-the-counter foreign currency derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward foreign currency rate curves, notional amounts, foreign currency rates and credit quality of the counterparties. Other fair value considerations See Note 12 in Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2022, for a discussion of the valuation of goodwill and intangible assets. Also, see Note 8 for further information on the annual impairment test as of August 31, 2023. DUKE ENERGY The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 10. See Note 11 for additional information related to investments by major security type for the Duke Energy Registrants. September 30, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 160 $ 160 $ — $ — $ — NDTF equity securities 6,530 6,491 — — 39 NDTF debt securities 2,569 755 1,814 — — Other equity securities 141 141 — — — Other debt securities 255 40 215 — — Other cash and cash equivalents 36 36 — — — Derivative assets 525 2 493 30 — Total assets 10,216 7,625 2,522 30 39 Derivative liabilities (520) (4) (516) — — Net assets $ 9,696 $ 7,621 $ 2,006 $ 30 $ 39 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 795 1 760 34 — Total assets 9,846 7,030 2,740 34 42 Derivative liabilities (437) (16) (421) — — Net assets $ 9,409 $ 7,014 $ 2,319 $ 34 $ 42 The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2023 2022 2023 2022 Balance at beginning of period $ 41 $ 89 $ 34 $ 24 Purchases, sales, issuances and settlements: Purchases 3 — 50 77 Settlements (18) (21) (76) (13) Total gains (losses) included on the Condensed Consolidated Balance Sheet 4 (8) 22 (28) Balance at end of period $ 30 $ 60 $ 30 $ 60 DUKE ENERGY CAROLINAS The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. September 30, 2023 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 59 $ 59 $ — $ — NDTF equity securities 3,767 3,728 — 39 NDTF debt securities 1,329 320 1,009 — Derivative assets 93 — 93 — Total assets 5,248 4,107 1,102 39 Derivative liabilities (204) — (204) — Net assets $ 5,044 $ 4,107 $ 898 $ 39 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 PROGRESS ENERGY The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 101 $ 101 $ — $ 98 $ 98 $ — NDTF equity securities 2,763 2,763 — 2,504 2,504 — NDTF debt securities 1,240 435 805 1,252 457 795 Other debt securities 23 — 23 25 — 25 Other cash and cash equivalents 8 8 — 11 11 — Derivative assets 196 — 196 248 — 248 Total assets 4,331 3,307 1,024 4,138 3,070 1,068 Derivative liabilities (137) — (137) (66) — (66) Net assets $ 4,194 $ 3,307 $ 887 $ 4,072 $ 3,070 $ 1,002 DUKE ENERGY PROGRESS The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 62 $ 62 $ — $ 56 $ 56 $ — NDTF equity securities 2,663 2,663 — 2,411 2,411 — NDTF debt securities 971 226 745 963 225 738 Other cash and cash equivalents 4 4 — 9 9 — Derivative assets 79 — 79 230 — 230 Total assets 3,779 2,955 824 3,669 2,701 968 Derivative liabilities (137) — (137) (48) — (48) Net assets $ 3,642 $ 2,955 $ 687 $ 3,621 $ 2,701 $ 920 DUKE ENERGY FLORIDA The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 39 $ 39 $ — $ 42 $ 42 $ — NDTF equity securities 100 100 — 93 93 — NDTF debt securities 269 209 60 289 232 57 Other debt securities 23 — 23 25 — 25 Other cash and cash equivalents 1 1 — 1 1 — Derivative assets 117 — 117 17 — 17 Total assets 549 349 200 467 368 99 Derivative liabilities — — — (19) — (19) Net assets $ 549 $ 349 $ 200 $ 448 $ 368 $ 80 DUKE ENERGY OHIO The recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets were not material at September 30, 2023, and December 31, 2022. DUKE ENERGY INDIANA The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 88 $ 88 $ — $ — $ 79 $ 79 $ — $ — Other debt securities 59 — 59 — 60 — 60 — Other cash and cash equivalents 3 3 — — 1 1 — — Derivative assets 55 1 27 27 110 — 81 29 Total assets 205 92 86 27 250 80 141 29 Derivative liabilities (4) (4) — — (16) (16) — — Net assets $ 201 $ 88 $ 86 $ 27 $ 234 $ 64 $ 141 $ 29 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) Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2023 2022 2023 2022 Balance at beginning of period $ 37 $ 84 $ 29 $ 22 Purchases, sales, issuances and settlements: Purchases — — 42 74 Settlements (14) (20) (70) (10) Total gains (losses) included on the Condensed Consolidated Balance Sheet 4 (8) 26 (30) Balance at end of period $ 27 $ 56 $ 27 $ 56 PIEDMONT The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ 1 $ 1 $ — $ — $ — $ — Derivative liabilities (145) — (145) (168) — (168) Net (liabilities) assets $ (144) $ 1 $ (145) $ (168) $ — $ (168) QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. September 30, 2023 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 3 RTO auction pricing FTR price – per MWh $ 0.43 - $ 2.07 $ 0.77 Duke Energy Indiana FTRs 27 RTO auction pricing FTR price – per MWh (1.64) - 12.51 1.90 Duke Energy Total Level 3 derivatives $ 30 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 OTHER FAIR VALUE DISCLOSURES The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Debt related to the Commercial Renewables Disposal Groups is now classified as held for sale and is excluded from the following disclosures. See Note 2 for further information. 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. September 30, 2023 December 31, 2022 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 75,387 $ 65,070 $ 69,751 $ 61,986 Duke Energy Carolinas 15,995 13,973 14,266 12,943 Progress Energy 23,281 20,417 22,439 20,467 Duke Energy Progress 11,718 9,808 11,087 9,689 Duke Energy Florida 9,920 8,892 9,709 8,991 Duke Energy Ohio 3,692 3,264 3,245 2,927 Duke Energy Indiana 4,504 3,874 4,307 3,913 Piedmont 3,713 3,123 3,363 2,940 (a) Book value of long-term debt inc ludes $1.1 billion and $1.2 billion at September 30, 2023, and December 31, 2022, respectively, of net unamortized debt discount and premium of purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt. At both September 30, 2023, and December 31, 2022, 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	9 Months Ended
	Sep. 30, 2023
Variable Interest Entities [Abstract]
Variable Interest Entities	VARIABLE INTEREST ENTITIES 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 nine months ended September 30, 2023, and the year ended December 31, 2022, 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 DERF and DEPR credit facilities are reflected on the Condensed Consolidated Balance Sheets as Long-Term Debt. Amounts borrowed under the DEFR credit facility are reflected on the Condensed Consolidated Balance Sheets as Current maturities of 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 Condensed 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 2024 Credit facility amount $ 350 $ 500 $ 400 $ 325 Amounts borrowed at September 30, 2023 336 500 400 325 Amounts borrowed at December 31, 2022 350 471 400 250 Restricted Receivables at September 30, 2023 619 1,028 831 758 Restricted Receivables at December 31, 2022 917 928 793 490 Nuclear Asset-Recovery Bonds – Duke Energy Florida Project Finance Duke Energy Florida Project Finance, LLC (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 Condensed Consolidated Balance Sheets. (in millions) September 30, 2023 December 31, 2022 Receivables of VIEs $ 8 $ 6 Regulatory Assets: Current 58 55 Current Assets: Other 24 41 Other Noncurrent Assets: Regulatory assets 816 826 Current Liabilities: Other 2 9 Current maturities of long-term debt 58 56 Long-Term Debt 832 890 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. 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. September 30, 2023 December 31, 2022 Duke Energy Duke Energy Duke Energy Duke Energy (in millions) Carolinas Progress Carolinas Progress Regulatory Assets: Current $ 12 $ 39 $ 12 $ 39 Current Assets: Other 5 16 8 29 Other Noncurrent Assets: Regulatory assets 199 653 208 681 Other Noncurrent Assets: Other 1 2 1 2 Current Liabilities: Other 1 4 3 8 Current maturities of long-term debt 11 34 10 34 Long-Term Debt 208 680 219 714 NON-CONSOLIDATED VIEs The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. September 30, 2023 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 122 $ 161 Investments in equity method unconsolidated affiliates 61 — — Other noncurrent assets 43 — — Total assets $ 104 $ 122 $ 161 Other current liabilities 18 — — Other noncurrent liabilities 12 — — Total liabilities $ 30 $ — $ — Net assets $ 74 $ 122 $ 161 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 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. 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. The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana (in millions) September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Receivables sold $ 334 $ 423 $ 330 $ 508 Less: Retained interests 122 198 161 317 Net receivables sold $ 212 $ 225 $ 169 $ 191 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Nine Months Ended Nine Months Ended September 30, September 30, (in millions) 2023 2022 2023 2022 Sales Receivables sold $ 1,973 $ 1,869 $ 2,453 $ 2,646 Loss recognized on sale 25 11 29 15 Cash flows Cash proceeds from receivables sold $ 2,024 $ 1,757 $ 2,580 $ 2,465 Collection fees received 1 1 1 1 Return received on retained interests 15 6 19 9 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 Condensed Consolidated Statements of Cash Flows.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE 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. 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 $ 15 $ 70 $ 7 $ 7 $ 7 $ 36 $ 142 Duke Energy Progress 2 8 — — — — 10 Duke Energy Florida 13 62 7 7 7 36 132 Duke Energy Indiana 4 16 17 15 7 5 64 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. 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 $ 17 $ 62 $ 61 $ 51 $ 49 $ 241 $ 481 Other The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers. Disaggregated Revenues Disaggregated revenues are presented as follows: Three Months Ended September 30, 2023 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 $ 3,602 $ 988 $ 2,043 $ 756 $ 1,287 $ 268 $ 303 $ — General 2,229 779 1,089 467 622 135 224 — Industrial 912 395 298 203 95 28 190 — Wholesale 647 141 422 364 58 12 71 — Other revenues 285 75 175 100 75 24 56 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 7,675 $ 2,378 $ 4,027 $ 1,890 $ 2,137 $ 467 $ 844 $ — Gas Utilities and Infrastructure Residential $ 152 $ — $ — $ — $ — $ 73 $ — $ 80 Commercial 88 — — — — 24 — 65 Industrial 26 — — — — 4 — 23 Power Generation — — — — — — — 23 Other revenues 28 — — — — 4 — 8 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 294 $ — $ — $ — $ — $ 105 $ — $ 199 Other Revenue from contracts with customers $ 8 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 7,977 $ 2,378 $ 4,027 $ 1,890 $ 2,137 $ 572 $ 844 $ 199 Other revenue sources (a) $ 17 $ 15 $ 28 $ (4) $ 27 $ 5 $ 7 $ 9 Total revenues $ 7,994 $ 2,393 $ 4,055 $ 1,886 $ 2,164 $ 577 $ 851 $ 208 Three Months Ended September 30, 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 $ 3,250 $ 887 $ 1,719 $ 670 $ 1,049 $ 249 $ 396 $ — General 2,077 686 947 419 528 150 291 — Industrial 986 366 298 216 82 62 260 — Wholesale 874 140 588 403 185 32 115 — Other revenues 248 105 317 259 58 15 19 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 7,435 $ 2,184 $ 3,869 $ 1,967 $ 1,902 $ 508 $ 1,081 $ — Gas Utilities and Infrastructure Residential $ 167 $ — $ — $ — $ — $ 88 $ — $ 79 Commercial 108 — — — — 26 — 82 Industrial 34 — — — — 4 — 30 Power Generation — — — — — — — 24 Other revenues 103 — — — — 4 — 83 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 412 $ — $ — $ — $ — $ 122 $ — $ 298 Other Revenue from contracts with customers $ 6 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 7,853 $ 2,184 $ 3,869 $ 1,967 $ 1,902 $ 630 $ 1,081 $ 298 Other revenue sources (a) $ (11) $ (9) $ 12 $ 2 $ 5 $ (2) $ 14 $ 8 Total revenues $ 7,842 $ 2,175 $ 3,881 $ 1,969 $ 1,907 $ 628 $ 1,095 $ 306 (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. Nine Months Ended September 30, 2023 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 $ 9,193 $ 2,527 $ 5,019 $ 1,902 $ 3,117 $ 710 $ 937 $ — General 5,936 1,974 2,844 1,194 1,650 411 706 — Industrial 2,630 1,011 844 560 284 155 618 — Wholesale 1,695 402 1,064 942 122 33 195 — Other revenues 618 202 440 238 202 73 103 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 20,072 $ 6,116 $ 10,211 $ 4,836 $ 5,375 $ 1,382 $ 2,559 $ — Gas Utilities and Infrastructure Residential $ 838 $ — $ — $ — $ — $ 317 $ — $ 522 Commercial 421 — — — — 113 — 309 Industrial 103 — — — — 19 — 84 Power Generation — — — — — — — 69 Other revenues 93 — — — — 15 — 32 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,455 $ — $ — $ — $ — $ 464 $ — $ 1,016 Other Revenue from contracts with customers $ 24 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 21,551 $ 6,116 $ 10,211 $ 4,836 $ 5,375 $ 1,846 $ 2,559 $ 1,016 Other revenue sources (a) $ 297 $ 39 $ 104 $ 8 $ 81 $ 29 $ 47 $ 103 Total revenues $ 21,848 $ 6,155 $ 10,315 $ 4,844 $ 5,456 $ 1,875 $ 2,606 $ 1,119 (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. Nine Months Ended September 30, 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 $ 8,642 $ 2,454 $ 4,487 $ 1,824 $ 2,663 $ 656 $ 1,046 $ — General 5,498 1,796 2,562 1,114 1,448 377 760 — Industrial 2,582 938 842 594 248 130 672 — Wholesale 2,129 356 1,388 1,033 355 90 296 — Other revenues 652 308 775 608 167 56 6 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 19,503 $ 5,852 $ 10,054 $ 5,173 $ 4,881 $ 1,309 $ 2,780 $ — Gas Utilities and Infrastructure Residential $ 936 $ — $ — $ — $ — $ 331 $ — $ 605 Commercial 504 — — — — 128 — 376 Industrial 125 — — — — 17 — 108 Power Generation — — — — — — — 71 Other revenues 284 — — — — 16 — 220 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,849 $ — $ — $ — $ — $ 492 $ — $ 1,380 Other Revenue from contracts with customers $ 21 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 21,373 $ 5,852 $ 10,054 $ 5,173 $ 4,881 $ 1,801 $ 2,780 $ 1,380 Other revenue sources (a) $ 44 $ (8) $ 33 $ 9 $ 9 $ 10 $ 55 $ 41 Total revenues $ 21,417 $ 5,844 $ 10,087 $ 5,182 $ 4,890 $ 1,811 $ 2,835 $ 1,421 (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. The following table presents the reserve for credit losses for trade and other receivables. Three Months Ended September 30, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at June 30, 2022 $ 135 $ 52 $ 52 $ 31 $ 21 $ 4 $ 3 $ 15 Write-Offs (49) (19) (26) (11) (15) — — (4) Credit Loss Expense 37 10 20 5 15 2 1 3 Other Adjustments 51 19 21 16 5 — — — Balance at September 30, 2022 $ 174 $ 62 $ 67 $ 41 $ 26 $ 6 $ 4 $ 14 Balance at June 30, 2023 $ 199 $ 57 $ 73 $ 43 $ 30 $ 8 $ 4 $ 13 Write-Offs (36) (14) (20) (11) (8) — — (5) Credit Loss Expense 23 5 15 2 13 — 1 2 Other Adjustments 17 8 9 10 (1) — — — Balance at September 30, 2023 $ 203 $ 56 $ 77 $ 44 $ 34 $ 8 $ 5 $ 10 Nine Months Ended September 30, 2022 and 2023 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, 2021 $ 121 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (103) (44) (45) (18) (28) — — (10) Credit Loss Expense 81 23 39 11 28 2 1 9 Other Adjustments 75 41 37 27 10 — — — Balance at September 30, 2022 $ 174 $ 62 $ 67 $ 41 $ 26 $ 6 $ 4 $ 14 Balance at December 31, 2022 $ 216 $ 68 $ 81 $ 44 $ 36 $ 6 $ 4 $ 14 Write-Offs (121) (54) (60) (30) (28) — — (11) Credit Loss Expense 62 18 33 7 26 2 1 7 Other Adjustments 46 24 23 23 — — — — Balance at September 30, 2023 $ 203 $ 56 $ 77 $ 44 $ 34 $ 8 $ 5 $ 10 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. September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 977 $ 356 $ 333 $ 206 $ 127 $ 2 $ 27 $ 8 Current 2,538 795 1,233 658 573 55 54 83 1-31 days past due 258 71 121 44 77 5 10 5 31-61 days past due 114 31 57 38 19 2 5 5 61-91 days past due 53 19 21 7 14 1 2 3 91+ days past due 234 60 71 24 47 37 24 5 Deferred Payment Arrangements (c) 104 31 50 27 23 3 — — Trade and Other Receivables $ 4,278 $ 1,363 $ 1,886 $ 1,004 $ 880 $ 105 $ 122 $ 109 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 Revenue (a)(b) $ 1,457 $ 486 $ 355 $ 232 $ 123 $ 20 $ 28 $ 160 Current 2,347 577 1,059 637 417 15 52 265 1-31 days past due 261 96 60 15 45 5 17 15 31-61 days past due 123 23 61 49 12 6 2 3 61-91 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 (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 Condensed 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 Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 13 for further information. These receivables for unbilled revenues are $95 million and $156 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of September 30, 2023, and $148 million and $260 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2022. (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	9 Months Ended
	Sep. 30, 2023
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 or convertible debt, were exercised or settled. Duke Energy applies the if-converted method for calculating any potential dilutive effect of the conversion of the outstanding convertible notes on diluted EPS, if applicable. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed 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. Three Months Ended September 30, Nine Months Ended September 30, (in millions, except per share amounts) 2023 2022 2023 2022 Net Income available to Duke Energy common stockholders $ 1,213 $ 1,383 $ 1,744 $ 3,094 Less: (Loss) Income from discontinued operations attributable to Duke Energy common stockholders (190) 23 (1,283) 62 Accumulated preferred stock dividends adjustment 12 12 12 12 Less: Impact of participating securities 2 1 4 2 Income from continuing operations available to Duke Energy common stockholders $ 1,413 $ 1,371 $ 3,035 $ 3,042 (Loss) Income from discontinued operations, net of tax $ (152) $ 3 $ (1,316) $ (30) Add: (Income) Loss attributable to NCI (38) 20 33 92 (Loss) Income from discontinued operations attributable to Duke Energy common stockholders $ (190) $ 23 $ (1,283) $ 62 Weighted average common shares outstanding – basic and diluted 771 770 771 770 EPS from continuing operations available to Duke Energy common stockholders Basic and diluted (a) $ 1.83 $ 1.78 $ 3.94 $ 3.95 (Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and diluted (a) $ (0.24) $ 0.03 $ (1.67) $ 0.08 Potentially dilutive items excluded from the calculation (b) 2 2 2 2 Dividends declared per common share $ 1.025 $ 1.005 $ 3.035 $ 2.975 Dividends declared on Series A preferred stock per depositary share (c) $ 0.359 $ 0.359 $ 1.078 $ 1.078 Dividends declared on Series B preferred stock per share (d) $ 24.375 $ 24.375 $ 48.750 $ 48.750 (a) For the periods presented subsequent to issuance in April 2023, the convertible notes were excluded from the calculations of diluted EPS because the effect was antidilutive. (b) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (c) 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. (d) 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.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2023
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 and non-qualified, non-contributory defined benefit retirement plans. 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. Nine Months Ended September 30, 2023 and 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Contributions made: 2023 $ 100 $ 26 $ 22 $ 13 $ 9 $ 5 $ 8 $ 3 2022 $ 58 $ 15 $ 13 $ 8 $ 5 $ 3 $ 5 $ 2 QUALIFIED PENSION PLANS The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 28 $ 9 $ 9 $ 5 $ 3 $ 1 $ 1 $ 1 Interest cost on projected benefit obligation 86 21 26 12 14 4 6 2 Expected return on plan assets (147) (40) (50) (24) (26) (6) (10) (5) Amortization of actuarial loss 2 — 1 — 1 — 1 — Amortization of prior service credit (3) — — — — — — (1) Amortization of settlement charges 5 3 1 1 — — — 1 Net periodic pension costs $ (29) $ (7) $ (13) $ (6) $ (8) $ (1) $ (2) $ (2) Three Months Ended September 30, 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 $ 39 $ 12 $ 11 $ 6 $ 4 $ 1 $ 3 $ 1 Interest cost on projected benefit obligation 58 14 19 9 10 3 4 2 Expected return on plan assets (140) (38) (46) (22) (24) (6) (9) (6) Amortization of actuarial loss 24 5 6 3 3 2 3 2 Amortization of prior service credit (5) (1) — — — — — (2) Amortization of settlement charges 14 3 5 4 1 2 1 2 Net periodic pension costs $ (10) $ (5) $ (5) $ — $ (6) $ 2 $ 2 $ (1) Nine Months Ended September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 87 $ 28 $ 25 $ 15 $ 10 $ 2 $ 4 $ 3 Interest cost on projected benefit obligation 258 63 80 37 43 13 20 7 Expected return on plan assets (441) (120) (149) (70) (78) (18) (30) (15) Amortization of actuarial loss 7 1 3 1 2 — 2 — Amortization of prior service credit (10) — — — — — (1) (5) Amortization of settlement charges 14 7 3 3 1 — 1 3 Net periodic pension costs $ (85) $ (21) $ (38) $ (14) $ (22) $ (3) $ (4) $ (7) Nine Months Ended September 30, 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 $ 120 $ 38 $ 34 $ 20 $ 14 $ 3 $ 7 $ 4 Interest cost on projected benefit obligation 175 41 55 25 30 9 14 6 Expected return on plan assets (421) (114) (139) (66) (72) (17) (28) (18) Amortization of actuarial loss 71 15 19 10 9 4 8 5 Amortization of prior service credit (14) (3) — — — — (1) (6) Amortization of settlement charges 18 6 6 5 1 2 1 2 Net periodic pension costs $ (51) $ (17) $ (25) $ (6) $ (18) $ 1 $ 1 $ (7) NON-QUALIFIED PENSION PLANS Net periodic pension costs for non-qualified pension plans were not material for the three and nine months ended September 30, 2023, and 2022. OTHER POST-RETIREMENT BENEFIT PLANS Net periodic costs for OPEB plans were not material for the three and nine months ended September 30, 2023, and 2022.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES EFFECTIVE TAX RATES The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table. Three Months Ended Nine Months Ended September 30, September 30, 2023 2022 2023 2022 Duke Energy 2.8 % 10.1 % 9.0 % 8.6 % Duke Energy Carolinas 4.9 % 5.2 % 8.0 % 6.3 % Progress Energy 15.7 % 15.8 % 16.2 % 16.2 % Duke Energy Progress 11.8 % 12.9 % 13.0 % 13.4 % Duke Energy Florida 20.8 % 18.4 % 20.3 % 19.4 % Duke Energy Ohio 14.9 % 14.2 % 15.8 % (14.6) % Duke Energy Indiana 18.5 % 16.8 % 17.8 % 0.5 % Piedmont 26.3 % 21.4 % 17.2 % 9.1 % The decrease in the ETR for Duke Energy for the three months ended September 30, 2023, was primarily due to benefits associated with ongoing tax efficiency efforts, partially offset by a decrease in the amortization of excess deferred taxes. During the third quarter of 2023, the Company evaluated the deductibility of certain items spanning periods currently open under federal statute, including items related to interest on company-owned life insurance. As a result of this analysis, the Company recorded a favorable adjustment of approximately $120 million. The increase in the ETR for Duke Energy Carolinas for the nine months ended September 30, 2023, was primarily due to a decrease in the amortization of excess deferred taxes. The decrease in the ETR for Duke Energy Progress for the three months ending September 30, 2023, was primarily due to the amortization of excess deferred taxes in relation to lower pretax income. The increase in the ETR for Duke Energy Florida for the three months ending September 30, 2023, was primarily due to a decrease in the amortization of excess deferred taxes, partially offset by an increase in production tax credits. The increase in the ETR for Duke Energy Ohio for the nine months ended September 30, 2023, was primarily due to a decrease in the amortization of excess deferred taxes related to the MGP Settlement recorded in the prior year. The increase in the ETR for Duke Energy Indiana for the three months ended September 30, 2023, was primarily d ue to the amortization of excess deferred taxes in relation to higher pretax income. The increase in the ETR for Duke Energy Indiana for the nine months ended September 30, 2023, was primarily due to the coal ash impairment based on the Indiana Supreme Court Opinion and the associated amortization of excess deferred taxes recorded in the prior year. The increase in the ETR for Piedmont for the three months ended September 30, 2023, was primarily due to the amortization of excess deferred taxes in relation to lower pretax losses. The increase in the ETR for Piedmont for the nine months ended September 30, 2023, was primarily due to a decrease in the amortization of excess deferred taxes.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2023
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 6, respectively.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income Attributable to Duke Energy Corporation	$ 1,252	$ 1,422	$ 1,836	$ 3,186

Insider Trading Arrangements

Insider Trading Arrangements - Alex Glenn [Member]	3 Months Ended	9 Months Ended
	Sep. 30, 2023 shares	Sep. 30, 2023 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		On August 25, 2023, Alex Glenn, Senior Vice President and Chief Executive Officer, Duke Energy Florida and Midwest, adopted a Rule 10b5-1 trading arrangement for the sale of up to 1,000 shares of the Company’s common stock between January 31, 2024, and March 28, 2024, or such earlier date if such plan is terminated sooner pursuant to the terms specified therein. Mr. Glenn's Rule 10b5-1 trading arrangement was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1 under the Exchange Act and the Company's policies regarding insider transactions.
Name	Alex Glenn
Title	Senior Vice President and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 25, 2023
Arrangement Duration	57 days
Aggregate Available	1,000	1,000

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policy)	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in the Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2022. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself. These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors. In preparing financial statements that conform to GAAP, management 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.
Basis of Consolidation and Noncontrolling Interest	BASIS OF CONSOLIDATION These Condensed 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 13 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. NONCONTROLLING INTEREST Duke Energy maintains a controlling financial interest in certain less than wholly owned 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 Condensed Consolidated Balance Sheets. 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.
Discontinued Operations	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 condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented. For the nine months ended September 30, 2023, and 2022, the Loss (Income) From Discontinued Operations, net of tax on Duke Energy's Condensed Consolidated Statements of Operations includes amounts related to noncontrolling interests. A portion of Noncontrolling interests on Duke Energy's Condensed 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.
Cash, Cash Equivalents, and Restricted Cash	CASH, CASH EQUIVALENTS AND RESTRICTED CASHDuke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 11 and 13 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets.
New Accounting Standards	NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2023.
Environmental Costs	Liabilities are recorded when losses become probable and are reasonably estimable.Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable.
Derivatives	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 Condensed Consolidated Statements of Operations and Comprehensive Income. 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. 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.
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.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.
Revenue from Contract with Customer	Duke Energy earns substantially all of its revenues through its reportable segments, EU&I and GU&I.
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 or convertible debt, were exercised or settled. Duke Energy applies the if-converted method for calculating any potential dilutive effect of the conversion of the outstanding convertible notes on diluted EPS, if applicable. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed 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.

Organization and Basis of Pre_3

Organization and Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Cash, Cash Equivalents and Restricted Cash	The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy (a) Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 324 $ 19 $ 87 $ 27 $ 41 $ 409 $ 44 $ 108 $ 49 $ 45 Other 49 4 44 17 23 82 8 74 28 41 Other Noncurrent Assets Other 9 1 2 2 — 11 1 2 2 — Total cash, cash equivalents and restricted cash $ 382 $ 24 $ 133 $ 46 $ 64 $ 502 $ 53 $ 184 $ 79 $ 86
Schedule of Utility Inventory	The components of inventory are presented in the tables below. September 30, 2023 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 $ 3,018 $ 1,045 $ 1,408 $ 920 $ 488 $ 132 $ 381 $ 15 Coal 758 330 187 110 77 24 217 — Natural gas, oil and other fuel 342 47 208 111 97 12 2 73 Total inventory $ 4,118 $ 1,422 $ 1,803 $ 1,141 $ 662 $ 168 $ 600 $ 88 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 fuel 360 35 157 88 69 5 3 160 Total inventory $ 3,584 $ 1,164 $ 1,579 $ 1,006 $ 573 $ 144 $ 489 $ 172
Schedule of Accounts Payable Finance Programs	The following table represents the changes in confirmed obligations outstanding for the three and nine months ended September 30, 2023, and 2022. Three months ended September 30, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Confirmed obligations outstanding at the June 30, 2022 $ 46 $ 9 $ 11 $ 3 $ 8 $ 9 $ — $ 17 Invoices confirmed during the period 86 6 21 7 14 12 — 47 Confirmed invoices paid during the period (58) (12) (15) (5) (10) (9) — (22) Confirmed obligations outstanding at September 30, 2022 $ 74 $ 3 $ 17 $ 5 $ 12 $ 12 $ — $ 42 Confirmed obligations outstanding at the June 30, 2023 $ 40 $ 5 $ 14 $ 12 $ 2 $ 2 $ — $ 19 Invoices confirmed during the period 47 2 11 2 9 4 — 30 Confirmed invoices paid during the period (18) (4) (8) (3) (5) — — (6) Confirmed obligations outstanding at September 30, 2023 $ 69 $ 3 $ 17 $ 11 $ 6 $ 6 $ — $ 43 Nine months ended September 30, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Confirmed obligations outstanding at the December 31, 2021 $ 19 $ — $ 9 $ — $ 9 $ 6 $ — $ 4 Invoices confirmed during the period 181 20 52 17 35 27 1 81 Confirmed invoices paid during the period (126) (17) (44) (12) (32) (21) (1) (43) Confirmed obligations outstanding at September 30, 2022 $ 74 $ 3 $ 17 $ 5 $ 12 $ 12 $ — $ 42 Confirmed obligations outstanding at the December 31, 2022 $ 87 $ 6 $ 19 $ 8 $ 11 $ 5 $ — $ 57 Invoices confirmed during the period 161 22 53 25 28 7 — 79 Confirmed invoices paid during the period (179) (25) (55) (22) (33) (6) — (93) Confirmed obligations outstanding at September 30, 2023 $ 69 $ 3 $ 17 $ 11 $ 6 $ 6 $ — $ 43

Dispositions (Tables)

Dispositions (Tables)	9 Months Ended
	Sep. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	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. (in millions) September 30, 2023 December 31, 2022 Current Assets Held for Sale Cash and cash equivalents $ 70 $ 10 Receivables, net 107 107 Inventory 84 88 Other 179 151 Total current assets held for sale 440 356 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 5,387 6,444 Accumulated depreciation and amortization (1,651) (1,651) Net property, plant and equipment 3,736 4,793 Operating lease right-of-use assets, net 144 140 Investments in equity method unconsolidated affiliates 504 522 Other 212 179 Total other noncurrent assets held for sale 860 841 Total Assets Held for Sale $ 5,036 $ 5,990 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 124 $ 122 Taxes accrued 22 17 Current maturities of long-term debt 268 276 Other 175 120 Total current liabilities associated with assets held for sale 589 535 Noncurrent Liabilities Associated with Assets Held for Sale Long-Term debt 1,047 1,188 Operating lease liabilities 154 150 Asset retirement obligations 201 190 Other 232 399 Total other noncurrent liabilities associated with assets held for sale 1,634 1,927 Total Liabilities Associated with Assets Held for Sale $ 2,223 $ 2,462 As of September 30, 2023, and December 31, 2022, the noncontrolling interest balance is $1.8 billion and $1.6 billion, respectively. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in (Loss) Income from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations. Three Months Ended Nine Months Ended September 30, September 30, (in millions) 2023 2022 2023 2022 Operating revenues $ 103 $ 129 $ 293 $ 372 Operation, maintenance and other 93 85 270 248 Depreciation and amortization (a) — 65 — 193 Property and other taxes 8 10 27 31 Other income and expenses, net (2) (1) (9) (4) Interest expense 10 18 53 55 Loss on disposal 169 — 1,603 — Loss before income taxes (179) (50) (1,669) (159) Income tax benefit (27) (30) (353) (106) Loss from discontinued operations $ (152) $ (20) $ (1,316) $ (53) Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations (38) 20 33 92 Net (loss) income from discontinued operations attributable to Duke Energy Corporation $ (190) $ — $ (1,283) $ 39 (a) Upon meeting the criteria for assets held for sale, beginning in November 2022 depreciation and amortization expense were ceased. Nine Months Ended September 30, (in millions) 2023 2022 Cash flows provided by (used in): Operating activities $ 545 $ 485 Investing activities (597) (223)

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2023
Segment Reporting Information [Line Items]
Business Segment Data	Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 7,695 $ 291 $ 7,986 $ 8 $ — $ 7,994 Intersegment revenues 20 22 42 25 (67) — Total revenues $ 7,715 $ 313 $ 8,028 $ 33 $ (67) $ 7,994 Segment income (loss) (a) $ 1,447 $ 15 $ 1,462 $ (59) $ — $ 1,403 Less: Noncontrolling interests (69) Add: Preferred stock dividend 39 Discontinued operations (190) Net Income $ 1,321 Segment assets (b) $ 155,588 $ 16,724 $ 172,312 $ 8,848 $ — $ 181,160 Three Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 7,431 $ 404 $ 7,835 $ 7 $ — $ 7,842 Intersegment revenues 8 23 31 23 (54) — Total revenues $ 7,439 $ 427 $ 7,866 $ 30 $ (54) $ 7,842 Segment income (loss) $ 1,540 $ 4 $ 1,544 $ (183) $ (1) $ 1,360 Less: Noncontrolling interests 9 Add: Preferred stock dividend 39 Discontinued operations 23 Net Income $ 1,413 (a) EU&I includes $95 million recorded within Impairment of assets and other charges and $16 million within Operations, maintenance and other on Duke Energy Carolinas' and Duke Energy Progress' Condensed Consolidated Statement of Operations related primarily to Duke Energy Carolinas' North Carolina rate case settlement and Duke Energy Progress' North Carolina rate case order. See Note 4 for additional information. (b) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. Nine Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 20,308 $ 1,516 $ 21,824 $ 24 $ — $ 21,848 Intersegment revenues 55 67 122 74 (196) — Total revenues $ 20,363 $ 1,583 $ 21,946 $ 98 $ (196) $ 21,848 Segment income (loss) (a) $ 3,088 $ 327 $ 3,415 $ (388) $ — $ 3,027 Less: Noncontrolling interests (42) Add: Preferred stock dividend 92 Discontinued operations (1,283) Net Income $ 1,878 Nine Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 19,552 $ 1,843 $ 21,395 $ 22 $ — $ 21,417 Intersegment revenues 24 69 93 69 (162) — Total revenues $ 19,576 $ 1,912 $ 21,488 $ 91 $ (162) $ 21,417 Segment income (loss) (b) $ 3,237 $ 277 $ 3,514 $ (480) $ (2) $ 3,032 Less: Noncontrolling interests 73 Add: Preferred stock dividend 92 Discontinued operations 62 Net Income $ 3,113 (a) EU&I includes $95 million recorded within Impairment of assets and other charges and $16 million within Operations, maintenance and other on Duke Energy Carolinas' and Duke Energy Progress' Condensed Consolidated Statement of Operations related primarily to Duke Energy Carolinas' North Carolina rate case settlement and Duke Energy Progress' North Carolina rate case order. See Note 4 for additional information. (b) EU&I includes $211 million recorded within Impairment of assets and other charges, $46 million within Operating revenues and $20 million within Noncontrolling Interests on the Condensed Consolidated Statements of Operations related to a Duke Energy Indiana Supreme Court ruling. See Note 4 for additional information.
Duke Energy Ohio
Segment Reporting Information [Line Items]
Business Segment Data	Three Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 472 $ 105 $ 577 $ — $ — $ 577 Segment income (loss)/Net income $ 65 $ 17 $ 82 $ (2) $ — $ 80 Segment assets $ 7,745 $ 4,218 $ 11,963 $ 10 $ (179) $ 11,794 Three Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 507 $ 121 $ 628 $ — $ 628 Segment income (loss)/Net income $ 74 $ 30 $ 104 $ (1) $ 103 Nine Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 1,411 $ 464 $ 1,875 $ — $ 1,875 Segment income (loss)/Net income $ 168 $ 87 $ 255 $ (4) $ 251 Nine Months Ended September 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 1,320 $ 491 $ 1,811 $ — $ 1,811 Segment income (loss)/Net income $ 152 $ 87 $ 239 $ (3) $ 236

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of 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 on the Condensed Consolidated Balance Sheets. (in millions) September 30, 2023 December 31, 2022 Reserves for Environmental Remediation Duke Energy $ 90 $ 84 Duke Energy Carolinas 24 22 Progress Energy 20 19 Duke Energy Progress 10 8 Duke Energy Florida 10 11 Duke Energy Ohio 36 33 Duke Energy Indiana 2 3 Piedmont 7 7

Debt and Credit Facilities (Tab

Debt and Credit Facilities (Tables)	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table summarizes significant debt issuances (in millions). Nine Months Ended September 30, 2023 Duke Duke Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Unsecured Debt April 2023 (a) April 2026 4.125 % $ 1,725 $ 1,725 $ — $ — $ — $ — $ — $ — June 2023 (b) June 2033 5.400 % 350 — — — — — — 350 September 2023 (c) September 2033 5.750 % 600 600 — — — — — — September 2023 (c) September 2053 6.100 % 750 750 — — — — — — First Mortgage Bonds January 2023 (d) January 2033 4.950 % 900 — 900 — — — — — January 2023 (d) January 2053 5.350 % 900 — 900 — — — — — March 2023 (e) March 2033 5.250 % 500 — — 500 — — — — March 2023 (e) March 2053 5.350 % 500 — — 500 — — — — March 2023 (f) April 2033 5.250 % 375 — — — — 375 — — March 2023 (f) April 2053 5.650 % 375 — — — — 375 — — March 2023 (g) April 2053 5.400 % 500 — — — — — 500 — June 2023 (h) January 2033 4.950 % 350 — 350 — — — — — June 2023 (h) January 2054 5.400 % 500 — 500 — — — — — September 2023 (i) October 2073 4.960 % 200 — — — 200 — — — Total issuances $ 8,525 $ 3,075 $ 2,650 $ 1,000 $ 200 $ 750 $ 500 $ 350 (a) See "Duke Energy (Parent) Convertible Senior Notes" below for additional information. (b) Proceeds will be used to repay $45 million of maturities due October 2023, to pay down a portion of short-term debt and for general corporate purposes. (c) Proceeds were primarily used to repay $400 million of maturities due October 2023, to pay down a portion of short-term debt and for general corporate purposes. (d) Proceeds were used to repay $1 billion of maturities due March 2023, to pay down a portion of short-term debt and for general company purposes. (e) Proceeds will be used to repay $300 million of maturities due September 2023, to pay down a portion of short-term debt and for general company purposes. (f) Proceeds will be used to repay $300 million of maturities due September 2023 and a portion of the $100 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general corporate purposes. (g) Proceeds were used to repay the $300 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general company purposes. (h) Proceeds were used to pay down a portion of short-term debt and for general company purposes. (i) Proceeds were used to pay down a portion of short-term debt and for general company purposes. The following table shows the significant components of Current maturities of long-term debt on the Condensed 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 September 30, 2023 Unsecured Debt Duke Energy Ohio (a) October 2023 5.813 % $ 150 Duke Energy (Parent) October 2023 3.950 % 400 Duke Energy (Parent) Term Loan Facility (a) March 2024 6.048 % 1,000 Duke Energy (Parent) April 2024 3.750 % 1,000 Duke Energy Florida (a) April 2024 6.196 % 800 Other (b) 684 Current maturities of long-term debt $ 4,034 (a) Debt has a floating interest rate. In October 2023, Duke Energy Kentucky's $50 million two (b) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities.
Schedule of Line of Credit Facilities	The table below includes the current borrowing sublimits and available capacity under these credit facilities. September 30, 2023 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 $ 2,275 $ 1,575 $ 1,400 $ 1,250 $ 750 $ 950 $ 800 Reduction to backstop issuances Commercial paper (b) (2,815) (106) (631) (841) (292) (298) (350) (297) Outstanding letters of credit (39) (27) (4) (1) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 6,065 $ 2,142 $ 940 $ 558 $ 951 $ 452 $ 519 $ 503 (a) Represents the sublimit of each borrower.

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	9 Months Ended
	Sep. 30, 2023
Asset Retirement Obligation [Abstract]
Schedule of Asset Retirement Obligations	The following table presents the AROs recorded on the Condensed Consolidated Balance Sheets. September 30, 2023 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) $ 7,459 $ 3,136 $ 4,295 $ 4,069 $ 226 $ — $ — $ — Closure of ash impoundments 4,474 2,065 1,530 1,509 21 77 801 — Other 300 67 105 44 61 61 41 28 Total ARO $ 12,233 $ 5,268 $ 5,930 $ 5,622 $ 308 $ 138 $ 842 $ 28 Less: Current portion 620 238 261 260 1 8 114 — Total noncurrent ARO $ 11,613 $ 5,030 $ 5,669 $ 5,362 $ 307 $ 130 $ 728 $ 28 (a) Duke Energy amount includes purchase accounting adjustments related to the merger with Progress Energy.
Schedule of Change in Asset Retirement Obligation	The following table presents the change in liability associated with AROs for the Duke Energy Registrants. 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, 2022 (a) $ 12,728 $ 5,382 $ 6,181 $ 5,823 $ 358 $ 154 $ 951 $ 26 Accretion expense (b) 391 189 178 169 9 5 24 2 Liabilities settled (c) (494) (171) (247) (196) (51) (11) (66) — Revisions in estimates of cash flows (d) (392) (132) (182) (174) (8) (10) (67) — Balance at September 30, 2023 $ 12,233 $ 5,268 $ 5,930 $ 5,622 $ 308 $ 138 $ 842 $ 28 (a) Primarily relates to decommissioning nuclear power facilities, closure of ash impoundments, asbestos removal, closure of landfills at fossil generation facilities, retirement of natural gas mains and removal of renewable energy generation assets. (b) For the nine months ended September 30, 2023, substantially all accretion expense relates to Duke Energy's regulated operations and has been deferred in accordance with regulatory accounting treatment. (c) Primarily relates to ash impoundment closures and nuclear decommissioning. (d) The amounts recorded represent the discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The decreases primarily relate to lower unit costs associated with basin closure, routine maintenance and beneficiation activities, as well as a reduction in monitoring wells needed.

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2023
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, Other Revenue and Expense	Material amounts related to transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2023 2022 2023 2022 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 198 $ 193 $ 586 $ 590 Indemnification coverages (b) 9 7 26 21 Joint Dispatch Agreement (JDA) revenue (c) 5 16 26 54 JDA expense (c) 58 210 121 477 Intercompany natural gas purchases (d) 5 5 14 14 Progress Energy Corporate governance and shared service expenses (a) $ 172 $ 188 $ 522 $ 568 Indemnification coverages (b) 11 10 35 32 JDA revenue (c) 58 210 121 477 JDA expense (c) 5 16 26 54 Intercompany natural gas purchases (d) 19 19 56 57 Duke Energy Progress Corporate governance and shared service expenses (a) $ 103 $ 111 $ 314 $ 338 Indemnification coverages (b) 5 5 15 15 JDA revenue (c) 58 210 121 477 JDA expense (c) 5 16 26 54 Intercompany natural gas purchases (d) 19 19 56 57 Duke Energy Florida Corporate governance and shared service expenses (a) $ 69 $ 77 $ 208 $ 230 Indemnification coverages (b) 6 5 20 17 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 73 $ 87 $ 222 $ 251 Indemnification coverages (b) 1 2 4 4 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 92 $ 115 $ 275 $ 330 Indemnification coverages (b) 2 2 6 6 Piedmont Corporate governance and shared service expenses (a) $ 32 $ 37 $ 107 $ 109 Indemnification coverages (b) 1 1 3 2 Intercompany natural gas sales (d) 24 24 70 71 Natural gas storage and transportation costs (e) 6 6 18 17 (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 and Impairment of assets and other charges on the Condensed 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 Condensed 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 Condensed 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 Condensed 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 September 30, 2023 Intercompany income tax receivable $ — $ — $ — $ — $ — $ — $ 24 Intercompany income tax payable 72 138 114 110 18 20 — December 31, 2022 Intercompany income tax receivable $ — $ 95 $ 36 $ 17 $ — $ — $ — Intercompany income tax payable 37 — — — 17 18 38

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	9 Months Ended
	Sep. 30, 2023
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. September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 1,875 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,477 650 1,500 500 1,000 300 27 Total notional amount $ 4,352 $ 650 $ 1,500 $ 500 $ 1,000 $ 300 $ 27 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 2,377 1,250 800 500 300 300 27 Total notional amount $ 2,877 $ 1,250 $ 800 $ 500 $ 300 $ 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. September 30, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 20,961 — — — 2,550 18,411 — Natural gas (millions of dekatherms) 841 276 272 272 — 21 272 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 dekatherms) 909 307 292 292 — 11 299 The following table shows Duke Energy's outstanding derivatives related to foreign currency risk at September 30, 2023. Fair Value Loss (a) (in millions) Pay Notional Receive Notional Receive Hedge Three Months Ended September 30, Nine Months Ended September 30, (in millions) Pay Rate (in millions) Rate Maturity Date 2023 2022 2023 2022 Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ (20) $ (41) $ (10) $ (57) 537 5.31 % 500 euros 3.85 % June 2034 (17) (34) (9) (47) Total notional amount $ 1,182 1,100 euros $ (37) $ (75) $ (19) $ (104)
Location and Fair Value of Derivatives Recognized in the Condensed 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 Condensed 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 September 30, 2023 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 $ 57 $ 11 $ 14 $ 9 $ 5 $ 2 $ 28 $ 1 Noncurrent 86 40 46 46 — — — — Total Derivative Assets – Commodity Contracts $ 143 $ 51 $ 60 $ 55 $ 5 $ 2 $ 28 $ 1 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 177 — — — — — — — Not Designated as Hedging Instruments Current 104 26 78 — 78 — — — Noncurrent 101 16 58 24 34 — 27 — Total Derivative Assets – Interest Rate Contracts $ 382 $ 42 $ 136 $ 24 $ 112 $ — $ 27 $ — Total Derivative Assets $ 525 $ 93 $ 196 $ 79 $ 117 $ 2 $ 55 $ 1 Derivative Liabilities September 30, 2023 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 $ 275 $ 156 $ 97 $ 97 $ — $ — $ 4 $ 18 Noncurrent 215 48 40 40 — — — 127 Total Derivative Liabilities – Commodity Contracts $ 490 $ 204 $ 137 $ 137 $ — $ — $ 4 $ 145 Interest Rate Contracts Not Designated as Hedging Instruments Noncurrent 1 — — — — 1 — — Total Derivative Liabilities – Interest Rate Contracts $ 1 $ — $ — $ — $ — $ 1 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 11 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 29 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 520 $ 204 $ 137 $ 137 $ — $ 1 $ 4 $ 145 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 $ 216 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets – Interest Rate Contracts $ 317 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets $ 795 $ 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 – Equity Securities Contracts $ 58 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 437 $ 127 $ 66 $ 48 $ 19 $ 2 $ 16 $ 168
Offsetting Assets	The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. 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 September 30, 2023 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 $ 161 $ 37 $ 92 $ 9 $ 83 $ 2 $ 28 $ 1 Offset (17) (9) (8) (8) — — — — Net amounts presented in Current Assets: Other $ 144 $ 28 $ 84 $ 1 $ 83 $ 2 $ 28 $ 1 Noncurrent Gross amounts recognized $ 364 $ 56 $ 104 $ 70 $ 34 $ — $ 27 $ — Offset (60) (32) (28) (28) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 304 $ 24 $ 76 $ 42 $ 34 $ — $ 27 $ — Derivative Liabilities September 30, 2023 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 $ 293 $ 156 $ 97 $ 97 $ — $ — $ 4 $ 18 Offset (17) (9) (8) (8) — — — — Cash collateral posted (16) (12) (1) (1) — — (4) — Net amounts presented in Current Liabilities: Other $ 260 $ 135 $ 88 $ 88 $ — $ — $ — $ 18 Noncurrent Gross amounts recognized $ 227 $ 48 $ 40 $ 40 $ — $ 1 $ — $ 127 Offset (60) (33) (28) (28) — — — — Cash collateral posted $ (8) $ (7) $ (1) $ (1) $ — $ — $ — $ — Net amounts presented in Other Noncurrent Liabilities: Other $ 159 $ 8 $ 11 $ 11 $ — $ 1 $ — $ 127 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 $ 582 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Offset (33) (15) (18) (18) — — — — Cash collateral received (31) (18) (12) (12) — — — — Net amounts presented in Current Assets: Other $ 518 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 213 $ 104 $ 108 $ 108 $ — $ — $ — $ — Offset (59) (29) (30) (30) — — — — Cash collateral received (38) (11) (27) (27) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 116 $ 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 Offset (33) (15) (18) (18) — — — — Cash collateral posted (16) — — — — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141
Offsetting Liabilities	The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. 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 September 30, 2023 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 $ 161 $ 37 $ 92 $ 9 $ 83 $ 2 $ 28 $ 1 Offset (17) (9) (8) (8) — — — — Net amounts presented in Current Assets: Other $ 144 $ 28 $ 84 $ 1 $ 83 $ 2 $ 28 $ 1 Noncurrent Gross amounts recognized $ 364 $ 56 $ 104 $ 70 $ 34 $ — $ 27 $ — Offset (60) (32) (28) (28) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 304 $ 24 $ 76 $ 42 $ 34 $ — $ 27 $ — Derivative Liabilities September 30, 2023 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 $ 293 $ 156 $ 97 $ 97 $ — $ — $ 4 $ 18 Offset (17) (9) (8) (8) — — — — Cash collateral posted (16) (12) (1) (1) — — (4) — Net amounts presented in Current Liabilities: Other $ 260 $ 135 $ 88 $ 88 $ — $ — $ — $ 18 Noncurrent Gross amounts recognized $ 227 $ 48 $ 40 $ 40 $ — $ 1 $ — $ 127 Offset (60) (33) (28) (28) — — — — Cash collateral posted $ (8) $ (7) $ (1) $ (1) $ — $ — $ — $ — Net amounts presented in Other Noncurrent Liabilities: Other $ 159 $ 8 $ 11 $ 11 $ — $ 1 $ — $ 127 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 $ 582 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Offset (33) (15) (18) (18) — — — — Cash collateral received (31) (18) (12) (12) — — — — Net amounts presented in Current Assets: Other $ 518 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 213 $ 104 $ 108 $ 108 $ — $ — $ — $ — Offset (59) (29) (30) (30) — — — — Cash collateral received (38) (11) (27) (27) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 116 $ 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 Offset (33) (15) (18) (18) — — — — Cash collateral posted (16) — — — — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141
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. September 30, 2023 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 312 $ 175 $ 138 $ 138 Fair value of collateral already posted 21 19 2 2 Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 291 $ 156 $ 136 $ 136 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

Investments in Debt and Equit_2

Investments in Debt and Equity Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 160 $ — $ — $ 215 Equity securities 4,218 44 6,530 3,658 105 5,871 Corporate debt securities — 80 612 1 85 641 Municipal bonds — 41 318 — 39 330 U.S. government bonds — 136 1,470 2 112 1,423 Other debt securities — 18 169 — 18 156 Total NDTF Investments $ 4,218 $ 319 $ 9,259 $ 3,661 $ 359 $ 8,636 Other Investments Cash and cash equivalents $ — $ — $ 36 $ — $ — $ 22 Equity securities 26 9 141 21 16 128 Corporate debt securities — 10 83 — 12 84 Municipal bonds — 3 74 — 3 78 U.S. government bonds — 5 46 — 2 62 Other debt securities — 5 52 — 3 41 Total Other Investments $ 26 $ 32 $ 432 $ 21 $ 36 $ 415 Total Investments $ 4,244 $ 351 $ 9,691 $ 3,682 $ 395 $ 9,051
Debt Securities, Available-for-sale	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 160 $ — $ — $ 215 Equity securities 4,218 44 6,530 3,658 105 5,871 Corporate debt securities — 80 612 1 85 641 Municipal bonds — 41 318 — 39 330 U.S. government bonds — 136 1,470 2 112 1,423 Other debt securities — 18 169 — 18 156 Total NDTF Investments $ 4,218 $ 319 $ 9,259 $ 3,661 $ 359 $ 8,636 Other Investments Cash and cash equivalents $ — $ — $ 36 $ — $ — $ 22 Equity securities 26 9 141 21 16 128 Corporate debt securities — 10 83 — 12 84 Municipal bonds — 3 74 — 3 78 U.S. government bonds — 5 46 — 2 62 Other debt securities — 5 52 — 3 41 Total Other Investments $ 26 $ 32 $ 432 $ 21 $ 36 $ 415 Total Investments $ 4,244 $ 351 $ 9,691 $ 3,682 $ 395 $ 9,051
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 three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 61 $ 25 $ 107 $ 170 Realized losses 35 61 117 247 AFS: Realized gains 16 7 37 22 Realized losses 45 40 104 105
Investments Classified by Contractual Maturity Date	The table below summarizes the maturity date for debt securities. September 30, 2023 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 $ 109 $ 21 $ 88 $ 7 Due after one through five years 671 209 388 235 153 19 Due after five through 10 years 545 311 197 184 13 10 Due after 10 years 1,471 802 569 531 38 23 Total $ 2,824 $ 1,329 $ 1,263 $ 971 $ 292 $ 59
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 59 $ — $ — $ 117 Equity securities 2,468 25 3,767 2,147 51 3,367 Corporate debt securities — 60 376 1 62 401 Municipal bonds — 9 45 — 10 64 U.S. government bonds — 73 745 1 51 685 Other debt securities — 18 163 — 18 148 Total NDTF Investments $ 2,468 $ 185 $ 5,155 $ 2,149 $ 192 $ 4,782
Debt Securities, Available-for-sale	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 59 $ — $ — $ 117 Equity securities 2,468 25 3,767 2,147 51 3,367 Corporate debt securities — 60 376 1 62 401 Municipal bonds — 9 45 — 10 64 U.S. government bonds — 73 745 1 51 685 Other debt securities — 18 163 — 18 148 Total NDTF Investments $ 2,468 $ 185 $ 5,155 $ 2,149 $ 192 $ 4,782
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 three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 43 $ 16 $ 70 $ 109 Realized losses 17 39 64 143 AFS: Realized gains 12 7 21 19 Realized losses 26 20 54 57
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 101 $ — $ — $ 98 Equity securities 1,750 19 2,763 1,511 54 2,504 Corporate debt securities — 20 236 — 23 240 Municipal bonds — 32 273 — 29 266 U.S. government bonds — 63 725 1 61 738 Other debt securities — — 6 — — 8 Total NDTF Investments $ 1,750 $ 134 $ 4,104 $ 1,512 $ 167 $ 3,854 Other Investments Cash and cash equivalents $ — $ — $ 8 $ — $ — $ 11 Municipal bonds — — 23 — — 25 Total Other Investments $ — $ — $ 31 $ — $ — $ 36 Total Investments $ 1,750 $ 134 $ 4,135 $ 1,512 $ 167 $ 3,890
Debt Securities, Available-for-sale	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 101 $ — $ — $ 98 Equity securities 1,750 19 2,763 1,511 54 2,504 Corporate debt securities — 20 236 — 23 240 Municipal bonds — 32 273 — 29 266 U.S. government bonds — 63 725 1 61 738 Other debt securities — — 6 — — 8 Total NDTF Investments $ 1,750 $ 134 $ 4,104 $ 1,512 $ 167 $ 3,854 Other Investments Cash and cash equivalents $ — $ — $ 8 $ — $ — $ 11 Municipal bonds — — 23 — — 25 Total Other Investments $ — $ — $ 31 $ — $ — $ 36 Total Investments $ 1,750 $ 134 $ 4,135 $ 1,512 $ 167 $ 3,890
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 three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 18 $ 9 $ 37 $ 61 Realized losses 18 22 53 104 AFS: Realized gains 4 — 16 3 Realized losses 19 9 50 32
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 62 $ — $ — $ 56 Equity securities 1,661 19 2,663 1,431 54 2,411 Corporate debt securities — 19 224 — 22 230 Municipal bonds — 32 273 — 29 266 U.S. government bonds — 43 469 1 37 460 Other debt securities — — 5 — — 7 Total NDTF Investments $ 1,661 $ 113 $ 3,696 $ 1,432 $ 142 $ 3,430 Other Investments Cash and cash equivalents $ — $ — $ 4 $ — $ — $ 9 Total Other Investments $ — $ — $ 4 $ — $ — $ 9 Total Investments $ 1,661 $ 113 $ 3,700 $ 1,432 $ 142 $ 3,439
Debt Securities, Available-for-sale	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 62 $ — $ — $ 56 Equity securities 1,661 19 2,663 1,431 54 2,411 Corporate debt securities — 19 224 — 22 230 Municipal bonds — 32 273 — 29 266 U.S. government bonds — 43 469 1 37 460 Other debt securities — — 5 — — 7 Total NDTF Investments $ 1,661 $ 113 $ 3,696 $ 1,432 $ 142 $ 3,430 Other Investments Cash and cash equivalents $ — $ — $ 4 $ — $ — $ 9 Total Other Investments $ — $ — $ 4 $ — $ — $ 9 Total Investments $ 1,661 $ 113 $ 3,700 $ 1,432 $ 142 $ 3,439
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 three and nine months ended September 30, 2023, and 2022, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 FV-NI: Realized gains $ 15 $ 9 $ 34 $ 60 Realized losses 18 21 52 101 AFS: Realized gains 4 — 15 3 Realized losses 18 9 47 29
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 39 $ — $ — $ 42 Equity securities 89 — 100 80 — 93 Corporate debt securities — 1 12 — 1 10 U.S. government bonds — 20 256 — 24 278 Other debt securities — — 1 — — 1 Total NDTF Investments (a) $ 89 $ 21 $ 408 $ 80 $ 25 $ 424 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 1 Municipal bonds — — 23 — — 25 Total Other Investments $ — $ — $ 24 $ — $ — $ 26 Total Investments $ 89 $ 21 $ 432 $ 80 $ 25 $ 450 (a) During the nine months ended September 30, 2023, and the year ended December 31, 2022, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Debt Securities, Available-for-sale	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 39 $ — $ — $ 42 Equity securities 89 — 100 80 — 93 Corporate debt securities — 1 12 — 1 10 U.S. government bonds — 20 256 — 24 278 Other debt securities — — 1 — — 1 Total NDTF Investments (a) $ 89 $ 21 $ 408 $ 80 $ 25 $ 424 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 1 Municipal bonds — — 23 — — 25 Total Other Investments $ — $ — $ 24 $ — $ — $ 26 Total Investments $ 89 $ 21 $ 432 $ 80 $ 25 $ 450 (a) During the nine months ended September 30, 2023, and the year ended December 31, 2022, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Cash and cash equivalents $ — $ — $ 3 $ — $ — $ 1 Equity securities 3 9 88 2 16 79 Corporate debt securities — — 9 — 1 8 Municipal bonds — 3 44 — 3 45 U.S. government bonds — — 6 — — 7 Total Investments $ 3 $ 12 $ 150 $ 2 $ 20 $ 140
Debt Securities, Available-for-sale	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. September 30, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Cash and cash equivalents $ — $ — $ 3 $ — $ — $ 1 Equity securities 3 9 88 2 16 79 Corporate debt securities — — 9 — 1 8 Municipal bonds — 3 44 — 3 45 U.S. government bonds — — 6 — — 7 Total Investments $ 3 $ 12 $ 150 $ 2 $ 20 $ 140

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2023
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 Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 10. See Note 11 for additional information related to investments by major security type for the Duke Energy Registrants. September 30, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 160 $ 160 $ — $ — $ — NDTF equity securities 6,530 6,491 — — 39 NDTF debt securities 2,569 755 1,814 — — Other equity securities 141 141 — — — Other debt securities 255 40 215 — — Other cash and cash equivalents 36 36 — — — Derivative assets 525 2 493 30 — Total assets 10,216 7,625 2,522 30 39 Derivative liabilities (520) (4) (516) — — Net assets $ 9,696 $ 7,621 $ 2,006 $ 30 $ 39 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 795 1 760 34 — Total assets 9,846 7,030 2,740 34 42 Derivative liabilities (437) (16) (421) — — Net assets $ 9,409 $ 7,014 $ 2,319 $ 34 $ 42
Reconciliation of Assets and Liabilities Measured At Fair Value on 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) Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2023 2022 2023 2022 Balance at beginning of period $ 41 $ 89 $ 34 $ 24 Purchases, sales, issuances and settlements: Purchases 3 — 50 77 Settlements (18) (21) (76) (13) Total gains (losses) included on the Condensed Consolidated Balance Sheet 4 (8) 22 (28) Balance at end of period $ 30 $ 60 $ 30 $ 60
Quantitative Information Table - Level 3	The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. September 30, 2023 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 3 RTO auction pricing FTR price – per MWh $ 0.43 - $ 2.07 $ 0.77 Duke Energy Indiana FTRs 27 RTO auction pricing FTR price – per MWh (1.64) - 12.51 1.90 Duke Energy Total Level 3 derivatives $ 30 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
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. Debt related to the Commercial Renewables Disposal Groups is now classified as held for sale and is excluded from the following disclosures. See Note 2 for further information. 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. September 30, 2023 December 31, 2022 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 75,387 $ 65,070 $ 69,751 $ 61,986 Duke Energy Carolinas 15,995 13,973 14,266 12,943 Progress Energy 23,281 20,417 22,439 20,467 Duke Energy Progress 11,718 9,808 11,087 9,689 Duke Energy Florida 9,920 8,892 9,709 8,991 Duke Energy Ohio 3,692 3,264 3,245 2,927 Duke Energy Indiana 4,504 3,874 4,307 3,913 Piedmont 3,713 3,123 3,363 2,940 (a) Book value of long-term debt inc ludes $1.1 billion and $1.2 billion
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 Condensed Consolidated Balance Sheets. September 30, 2023 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 59 $ 59 $ — $ — NDTF equity securities 3,767 3,728 — 39 NDTF debt securities 1,329 320 1,009 — Derivative assets 93 — 93 — Total assets 5,248 4,107 1,102 39 Derivative liabilities (204) — (204) — Net assets $ 5,044 $ 4,107 $ 898 $ 39 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
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 Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 101 $ 101 $ — $ 98 $ 98 $ — NDTF equity securities 2,763 2,763 — 2,504 2,504 — NDTF debt securities 1,240 435 805 1,252 457 795 Other debt securities 23 — 23 25 — 25 Other cash and cash equivalents 8 8 — 11 11 — Derivative assets 196 — 196 248 — 248 Total assets 4,331 3,307 1,024 4,138 3,070 1,068 Derivative liabilities (137) — (137) (66) — (66) Net assets $ 4,194 $ 3,307 $ 887 $ 4,072 $ 3,070 $ 1,002
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 Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 62 $ 62 $ — $ 56 $ 56 $ — NDTF equity securities 2,663 2,663 — 2,411 2,411 — NDTF debt securities 971 226 745 963 225 738 Other cash and cash equivalents 4 4 — 9 9 — Derivative assets 79 — 79 230 — 230 Total assets 3,779 2,955 824 3,669 2,701 968 Derivative liabilities (137) — (137) (48) — (48) Net assets $ 3,642 $ 2,955 $ 687 $ 3,621 $ 2,701 $ 920
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 Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 39 $ 39 $ — $ 42 $ 42 $ — NDTF equity securities 100 100 — 93 93 — NDTF debt securities 269 209 60 289 232 57 Other debt securities 23 — 23 25 — 25 Other cash and cash equivalents 1 1 — 1 1 — Derivative assets 117 — 117 17 — 17 Total assets 549 349 200 467 368 99 Derivative liabilities — — — (19) — (19) Net assets $ 549 $ 349 $ 200 $ 448 $ 368 $ 80
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 Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 88 $ 88 $ — $ — $ 79 $ 79 $ — $ — Other debt securities 59 — 59 — 60 — 60 — Other cash and cash equivalents 3 3 — — 1 1 — — Derivative assets 55 1 27 27 110 — 81 29 Total assets 205 92 86 27 250 80 141 29 Derivative liabilities (4) (4) — — (16) (16) — — Net assets $ 201 $ 88 $ 86 $ 27 $ 234 $ 64 $ 141 $ 29
Reconciliation of Assets and Liabilities Measured At Fair Value on 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) Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2023 2022 2023 2022 Balance at beginning of period $ 37 $ 84 $ 29 $ 22 Purchases, sales, issuances and settlements: Purchases — — 42 74 Settlements (14) (20) (70) (10) Total gains (losses) included on the Condensed Consolidated Balance Sheet 4 (8) 26 (30) Balance at end of period $ 27 $ 56 $ 27 $ 56
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 Condensed Consolidated Balance Sheets. September 30, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ 1 $ 1 $ — $ — $ — $ — Derivative liabilities (145) — (145) (168) — (168) Net (liabilities) assets $ (144) $ 1 $ (145) $ (168) $ — $ (168)

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2023
VIE primary beneficiary
Variable Interest Entities [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 2024 Credit facility amount $ 350 $ 500 $ 400 $ 325 Amounts borrowed at September 30, 2023 336 500 400 325 Amounts borrowed at December 31, 2022 350 471 400 250 Restricted Receivables at September 30, 2023 619 1,028 831 758 Restricted Receivables at December 31, 2022 917 928 793 490
VIE not primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. September 30, 2023 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 122 $ 161 Investments in equity method unconsolidated affiliates 61 — — Other noncurrent assets 43 — — Total assets $ 104 $ 122 $ 161 Other current liabilities 18 — — Other noncurrent liabilities 12 — — Total liabilities $ 30 $ — $ — Net assets $ 74 $ 122 $ 161 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
DEFPF | VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets. (in millions) September 30, 2023 December 31, 2022 Receivables of VIEs $ 8 $ 6 Regulatory Assets: Current 58 55 Current Assets: Other 24 41 Other Noncurrent Assets: Regulatory assets 816 826 Current Liabilities: Other 2 9 Current maturities of long-term debt 58 56 Long-Term Debt 832 890
DECNCSF and DEPNCSF | VIE primary beneficiary
Variable Interest Entities [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. September 30, 2023 December 31, 2022 Duke Energy Duke Energy Duke Energy Duke Energy (in millions) Carolinas Progress Carolinas Progress Regulatory Assets: Current $ 12 $ 39 $ 12 $ 39 Current Assets: Other 5 16 8 29 Other Noncurrent Assets: Regulatory assets 199 653 208 681 Other Noncurrent Assets: Other 1 2 1 2 Current Liabilities: Other 1 4 3 8 Current maturities of long-term debt 11 34 10 34 Long-Term Debt 208 680 219 714
CRC | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana (in millions) September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Receivables sold $ 334 $ 423 $ 330 $ 508 Less: Retained interests 122 198 161 317 Net receivables sold $ 212 $ 225 $ 169 $ 191 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Nine Months Ended Nine Months Ended September 30, September 30, (in millions) 2023 2022 2023 2022 Sales Receivables sold $ 1,973 $ 1,869 $ 2,453 $ 2,646 Loss recognized on sale 25 11 29 15 Cash flows Cash proceeds from receivables sold $ 2,024 $ 1,757 $ 2,580 $ 2,465 Collection fees received 1 1 1 1 Return received on retained interests 15 6 19 9

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2023
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 $ 15 $ 70 $ 7 $ 7 $ 7 $ 36 $ 142 Duke Energy Progress 2 8 — — — — 10 Duke Energy Florida 13 62 7 7 7 36 132 Duke Energy Indiana 4 16 17 15 7 5 64 Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Piedmont $ 17 $ 62 $ 61 $ 51 $ 49 $ 241 $ 481
Disaggregation of Revenue	Disaggregated revenues are presented as follows: Three Months Ended September 30, 2023 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 $ 3,602 $ 988 $ 2,043 $ 756 $ 1,287 $ 268 $ 303 $ — General 2,229 779 1,089 467 622 135 224 — Industrial 912 395 298 203 95 28 190 — Wholesale 647 141 422 364 58 12 71 — Other revenues 285 75 175 100 75 24 56 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 7,675 $ 2,378 $ 4,027 $ 1,890 $ 2,137 $ 467 $ 844 $ — Gas Utilities and Infrastructure Residential $ 152 $ — $ — $ — $ — $ 73 $ — $ 80 Commercial 88 — — — — 24 — 65 Industrial 26 — — — — 4 — 23 Power Generation — — — — — — — 23 Other revenues 28 — — — — 4 — 8 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 294 $ — $ — $ — $ — $ 105 $ — $ 199 Other Revenue from contracts with customers $ 8 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 7,977 $ 2,378 $ 4,027 $ 1,890 $ 2,137 $ 572 $ 844 $ 199 Other revenue sources (a) $ 17 $ 15 $ 28 $ (4) $ 27 $ 5 $ 7 $ 9 Total revenues $ 7,994 $ 2,393 $ 4,055 $ 1,886 $ 2,164 $ 577 $ 851 $ 208 Three Months Ended September 30, 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 $ 3,250 $ 887 $ 1,719 $ 670 $ 1,049 $ 249 $ 396 $ — General 2,077 686 947 419 528 150 291 — Industrial 986 366 298 216 82 62 260 — Wholesale 874 140 588 403 185 32 115 — Other revenues 248 105 317 259 58 15 19 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 7,435 $ 2,184 $ 3,869 $ 1,967 $ 1,902 $ 508 $ 1,081 $ — Gas Utilities and Infrastructure Residential $ 167 $ — $ — $ — $ — $ 88 $ — $ 79 Commercial 108 — — — — 26 — 82 Industrial 34 — — — — 4 — 30 Power Generation — — — — — — — 24 Other revenues 103 — — — — 4 — 83 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 412 $ — $ — $ — $ — $ 122 $ — $ 298 Other Revenue from contracts with customers $ 6 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 7,853 $ 2,184 $ 3,869 $ 1,967 $ 1,902 $ 630 $ 1,081 $ 298 Other revenue sources (a) $ (11) $ (9) $ 12 $ 2 $ 5 $ (2) $ 14 $ 8 Total revenues $ 7,842 $ 2,175 $ 3,881 $ 1,969 $ 1,907 $ 628 $ 1,095 $ 306 (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. Nine Months Ended September 30, 2023 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 $ 9,193 $ 2,527 $ 5,019 $ 1,902 $ 3,117 $ 710 $ 937 $ — General 5,936 1,974 2,844 1,194 1,650 411 706 — Industrial 2,630 1,011 844 560 284 155 618 — Wholesale 1,695 402 1,064 942 122 33 195 — Other revenues 618 202 440 238 202 73 103 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 20,072 $ 6,116 $ 10,211 $ 4,836 $ 5,375 $ 1,382 $ 2,559 $ — Gas Utilities and Infrastructure Residential $ 838 $ — $ — $ — $ — $ 317 $ — $ 522 Commercial 421 — — — — 113 — 309 Industrial 103 — — — — 19 — 84 Power Generation — — — — — — — 69 Other revenues 93 — — — — 15 — 32 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,455 $ — $ — $ — $ — $ 464 $ — $ 1,016 Other Revenue from contracts with customers $ 24 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 21,551 $ 6,116 $ 10,211 $ 4,836 $ 5,375 $ 1,846 $ 2,559 $ 1,016 Other revenue sources (a) $ 297 $ 39 $ 104 $ 8 $ 81 $ 29 $ 47 $ 103 Total revenues $ 21,848 $ 6,155 $ 10,315 $ 4,844 $ 5,456 $ 1,875 $ 2,606 $ 1,119 (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. Nine Months Ended September 30, 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 $ 8,642 $ 2,454 $ 4,487 $ 1,824 $ 2,663 $ 656 $ 1,046 $ — General 5,498 1,796 2,562 1,114 1,448 377 760 — Industrial 2,582 938 842 594 248 130 672 — Wholesale 2,129 356 1,388 1,033 355 90 296 — Other revenues 652 308 775 608 167 56 6 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 19,503 $ 5,852 $ 10,054 $ 5,173 $ 4,881 $ 1,309 $ 2,780 $ — Gas Utilities and Infrastructure Residential $ 936 $ — $ — $ — $ — $ 331 $ — $ 605 Commercial 504 — — — — 128 — 376 Industrial 125 — — — — 17 — 108 Power Generation — — — — — — — 71 Other revenues 284 — — — — 16 — 220 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,849 $ — $ — $ — $ — $ 492 $ — $ 1,380 Other Revenue from contracts with customers $ 21 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 21,373 $ 5,852 $ 10,054 $ 5,173 $ 4,881 $ 1,801 $ 2,780 $ 1,380 Other revenue sources (a) $ 44 $ (8) $ 33 $ 9 $ 9 $ 10 $ 55 $ 41 Total revenues $ 21,417 $ 5,844 $ 10,087 $ 5,182 $ 4,890 $ 1,811 $ 2,835 $ 1,421 (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.
Reserve for Credit Losses for Trade and Other Receivables	The following table presents the reserve for credit losses for trade and other receivables. Three Months Ended September 30, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at June 30, 2022 $ 135 $ 52 $ 52 $ 31 $ 21 $ 4 $ 3 $ 15 Write-Offs (49) (19) (26) (11) (15) — — (4) Credit Loss Expense 37 10 20 5 15 2 1 3 Other Adjustments 51 19 21 16 5 — — — Balance at September 30, 2022 $ 174 $ 62 $ 67 $ 41 $ 26 $ 6 $ 4 $ 14 Balance at June 30, 2023 $ 199 $ 57 $ 73 $ 43 $ 30 $ 8 $ 4 $ 13 Write-Offs (36) (14) (20) (11) (8) — — (5) Credit Loss Expense 23 5 15 2 13 — 1 2 Other Adjustments 17 8 9 10 (1) — — — Balance at September 30, 2023 $ 203 $ 56 $ 77 $ 44 $ 34 $ 8 $ 5 $ 10 Nine Months Ended September 30, 2022 and 2023 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, 2021 $ 121 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (103) (44) (45) (18) (28) — — (10) Credit Loss Expense 81 23 39 11 28 2 1 9 Other Adjustments 75 41 37 27 10 — — — Balance at September 30, 2022 $ 174 $ 62 $ 67 $ 41 $ 26 $ 6 $ 4 $ 14 Balance at December 31, 2022 $ 216 $ 68 $ 81 $ 44 $ 36 $ 6 $ 4 $ 14 Write-Offs (121) (54) (60) (30) (28) — — (11) Credit Loss Expense 62 18 33 7 26 2 1 7 Other Adjustments 46 24 23 23 — — — — Balance at September 30, 2023 $ 203 $ 56 $ 77 $ 44 $ 34 $ 8 $ 5 $ 10
Aging of Trade Receivables	The aging of trade receivables is presented in the table below. September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 977 $ 356 $ 333 $ 206 $ 127 $ 2 $ 27 $ 8 Current 2,538 795 1,233 658 573 55 54 83 1-31 days past due 258 71 121 44 77 5 10 5 31-61 days past due 114 31 57 38 19 2 5 5 61-91 days past due 53 19 21 7 14 1 2 3 91+ days past due 234 60 71 24 47 37 24 5 Deferred Payment Arrangements (c) 104 31 50 27 23 3 — — Trade and Other Receivables $ 4,278 $ 1,363 $ 1,886 $ 1,004 $ 880 $ 105 $ 122 $ 109 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 Revenue (a)(b) $ 1,457 $ 486 $ 355 $ 232 $ 123 $ 20 $ 28 $ 160 Current 2,347 577 1,059 637 417 15 52 265 1-31 days past due 261 96 60 15 45 5 17 15 31-61 days past due 123 23 61 49 12 6 2 3 61-91 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 (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 Condensed 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 Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 13 for further information. These receivables for unbilled revenues are $95 million and $156 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of September 30, 2023, and $148 million and $260 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2022. (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)	9 Months Ended
	Sep. 30, 2023
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. Three Months Ended September 30, Nine Months Ended September 30, (in millions, except per share amounts) 2023 2022 2023 2022 Net Income available to Duke Energy common stockholders $ 1,213 $ 1,383 $ 1,744 $ 3,094 Less: (Loss) Income from discontinued operations attributable to Duke Energy common stockholders (190) 23 (1,283) 62 Accumulated preferred stock dividends adjustment 12 12 12 12 Less: Impact of participating securities 2 1 4 2 Income from continuing operations available to Duke Energy common stockholders $ 1,413 $ 1,371 $ 3,035 $ 3,042 (Loss) Income from discontinued operations, net of tax $ (152) $ 3 $ (1,316) $ (30) Add: (Income) Loss attributable to NCI (38) 20 33 92 (Loss) Income from discontinued operations attributable to Duke Energy common stockholders $ (190) $ 23 $ (1,283) $ 62 Weighted average common shares outstanding – basic and diluted 771 770 771 770 EPS from continuing operations available to Duke Energy common stockholders Basic and diluted (a) $ 1.83 $ 1.78 $ 3.94 $ 3.95 (Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and diluted (a) $ (0.24) $ 0.03 $ (1.67) $ 0.08 Potentially dilutive items excluded from the calculation (b) 2 2 2 2 Dividends declared per common share $ 1.025 $ 1.005 $ 3.035 $ 2.975 Dividends declared on Series A preferred stock per depositary share (c) $ 0.359 $ 0.359 $ 1.078 $ 1.078 Dividends declared on Series B preferred stock per share (d) $ 24.375 $ 24.375 $ 48.750 $ 48.750 (a) For the periods presented subsequent to issuance in April 2023, the convertible notes were excluded from the calculations of diluted EPS because the effect was antidilutive. (b) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (c) 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. (d) 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.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	The following table includes information related to the Duke Energy Registrants' contributions to its qualified defined benefit pension plans. Nine Months Ended September 30, 2023 and 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Contributions made: 2023 $ 100 $ 26 $ 22 $ 13 $ 9 $ 5 $ 8 $ 3 2022 $ 58 $ 15 $ 13 $ 8 $ 5 $ 3 $ 5 $ 2
Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Pension Costs	The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 28 $ 9 $ 9 $ 5 $ 3 $ 1 $ 1 $ 1 Interest cost on projected benefit obligation 86 21 26 12 14 4 6 2 Expected return on plan assets (147) (40) (50) (24) (26) (6) (10) (5) Amortization of actuarial loss 2 — 1 — 1 — 1 — Amortization of prior service credit (3) — — — — — — (1) Amortization of settlement charges 5 3 1 1 — — — 1 Net periodic pension costs $ (29) $ (7) $ (13) $ (6) $ (8) $ (1) $ (2) $ (2) Three Months Ended September 30, 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 $ 39 $ 12 $ 11 $ 6 $ 4 $ 1 $ 3 $ 1 Interest cost on projected benefit obligation 58 14 19 9 10 3 4 2 Expected return on plan assets (140) (38) (46) (22) (24) (6) (9) (6) Amortization of actuarial loss 24 5 6 3 3 2 3 2 Amortization of prior service credit (5) (1) — — — — — (2) Amortization of settlement charges 14 3 5 4 1 2 1 2 Net periodic pension costs $ (10) $ (5) $ (5) $ — $ (6) $ 2 $ 2 $ (1) Nine Months Ended September 30, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 87 $ 28 $ 25 $ 15 $ 10 $ 2 $ 4 $ 3 Interest cost on projected benefit obligation 258 63 80 37 43 13 20 7 Expected return on plan assets (441) (120) (149) (70) (78) (18) (30) (15) Amortization of actuarial loss 7 1 3 1 2 — 2 — Amortization of prior service credit (10) — — — — — (1) (5) Amortization of settlement charges 14 7 3 3 1 — 1 3 Net periodic pension costs $ (85) $ (21) $ (38) $ (14) $ (22) $ (3) $ (4) $ (7) Nine Months Ended September 30, 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 $ 120 $ 38 $ 34 $ 20 $ 14 $ 3 $ 7 $ 4 Interest cost on projected benefit obligation 175 41 55 25 30 9 14 6 Expected return on plan assets (421) (114) (139) (66) (72) (17) (28) (18) Amortization of actuarial loss 71 15 19 10 9 4 8 5 Amortization of prior service credit (14) (3) — — — — (1) (6) Amortization of settlement charges 18 6 6 5 1 2 1 2 Net periodic pension costs $ (51) $ (17) $ (25) $ (6) $ (18) $ 1 $ 1 $ (7)
2023000000	$ 100	$ 58
Qualified Pension Plans | Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
2023000000	26	15
Qualified Pension Plans | Progress Energy
Defined Benefit Plan Disclosure [Line Items]
2023000000	22	13
Qualified Pension Plans | Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
2023000000	13	8
Qualified Pension Plans | Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
2023000000	9	5
Qualified Pension Plans | Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
2023000000	5	3
Qualified Pension Plans | Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
2023000000	8	5
Qualified Pension Plans | Piedmont
Defined Benefit Plan Disclosure [Line Items]
2023000000	$ 3	$ 2

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Summary of Effective Tax Rates	The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table. Three Months Ended Nine Months Ended September 30, September 30, 2023 2022 2023 2022 Duke Energy 2.8 % 10.1 % 9.0 % 8.6 % Duke Energy Carolinas 4.9 % 5.2 % 8.0 % 6.3 % Progress Energy 15.7 % 15.8 % 16.2 % 16.2 % Duke Energy Progress 11.8 % 12.9 % 13.0 % 13.4 % Duke Energy Florida 20.8 % 18.4 % 20.3 % 19.4 % Duke Energy Ohio 14.9 % 14.2 % 15.8 % (14.6) % Duke Energy Indiana 18.5 % 16.8 % 17.8 % 0.5 % Piedmont 26.3 % 21.4 % 17.2 % 9.1 %

Organization and Basis of Pre_4

Organization and Basis of Presentation (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 324	$ 409
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	574	603	$ 629	$ 520
Duke Energy (Parent)
Current Assets
Cash and cash equivalents	324	409
Other	49	82
Other Noncurrent Assets
Other	9	11
Total cash, cash equivalents and restricted cash	382	502
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	19	44
Other	4	8
Other Noncurrent Assets
Other	1	1
Total cash, cash equivalents and restricted cash	24	53	42	8
Progress Energy
Current Assets
Cash and cash equivalents	87	108
Other	44	74
Other Noncurrent Assets
Other	2	2
Total cash, cash equivalents and restricted cash	133	184	137	113
Duke Energy Progress
Current Assets
Cash and cash equivalents	27	49
Other	17	28
Other Noncurrent Assets
Other	2	2
Total cash, cash equivalents and restricted cash	46	79	77	39
Duke Energy Florida
Current Assets
Cash and cash equivalents	41	45
Other	23	41
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	$ 64	$ 86	$ 42	$ 62

Organization and Basis of Pre_5

Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Public Utilities, Inventory [Line Items]
Inventory	$ 4,118	$ 3,584
Duke Energy (Parent)
Public Utilities, Inventory [Line Items]
Materials and supplies	3,018	2,604
Coal	758	620
Natural gas, oil and other fuel	342	360
Inventory	4,118	3,584
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Materials and supplies	1,045	876
Coal	330	253
Natural gas, oil and other fuel	47	35
Inventory	1,422	1,164
Progress Energy
Public Utilities, Inventory [Line Items]
Materials and supplies	1,408	1,232
Coal	187	190
Natural gas, oil and other fuel	208	157
Inventory	1,803	1,579
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Materials and supplies	920	819
Coal	110	99
Natural gas, oil and other fuel	111	88
Inventory	1,141	1,006
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Materials and supplies	488	413
Coal	77	91
Natural gas, oil and other fuel	97	69
Inventory	662	573
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Materials and supplies	132	105
Coal	24	34
Natural gas, oil and other fuel	12	5
Inventory	168	144
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Materials and supplies	381	342
Coal	217	144
Natural gas, oil and other fuel	2	3
Inventory	600	489
Piedmont
Public Utilities, Inventory [Line Items]
Materials and supplies	15	12
Natural gas, oil and other fuel	73	160
Inventory	$ 88	$ 172

Organization and Basis of Pre_6

Organization and Basis of Presentation (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	May 30, 2022
Regulatory Asset [Line Items]
Other	$ 3,698	$ 3,400
Offshore Wind Arrangement
Regulatory Asset [Line Items]
Other			$ 150

Organization and Basis of Pre_7

Organization and Basis of Presentation (Confirmed Obligations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Duke Energy (Parent)
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	$ 40	$ 46	$ 87	$ 19
Invoices confirmed during the period	47	86	161	181
Confirmed invoices paid during the period	(18)	(58)	(179)	(126)
Confirmed obligations at end of period	69	74	69	74
Duke Energy Carolinas
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	5	9	6
Invoices confirmed during the period	2	6	22	20
Confirmed invoices paid during the period	(4)	(12)	(25)	(17)
Confirmed obligations at end of period	3	3	3	3
Progress Energy
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	14	11	19	9
Invoices confirmed during the period	11	21	53	52
Confirmed invoices paid during the period	(8)	(15)	(55)	(44)
Confirmed obligations at end of period	17	17	17	17
Duke Energy Progress
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	12	3	8
Invoices confirmed during the period	2	7	25	17
Confirmed invoices paid during the period	(3)	(5)	(22)	(12)
Confirmed obligations at end of period	11	5	11	5
Duke Energy Florida
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	2	8	11	9
Invoices confirmed during the period	9	14	28	35
Confirmed invoices paid during the period	(5)	(10)	(33)	(32)
Confirmed obligations at end of period	6	12	6	12
Duke Energy Ohio
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	2	9	5	6
Invoices confirmed during the period	4	12	7	27
Confirmed invoices paid during the period		(9)	(6)	(21)
Confirmed obligations at end of period	6	12	6	12
Duke Energy Indiana
Contractual Obligations [Roll Forward]
Invoices confirmed during the period				1
Confirmed invoices paid during the period				(1)
Piedmont
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	19	17	57	4
Invoices confirmed during the period	30	47	79	81
Confirmed invoices paid during the period	(6)	(22)	(93)	(43)
Confirmed obligations at end of period	$ 43	$ 42	$ 43	$ 42

Dispositions (Narrative) (Detai

Dispositions (Narrative) (Details) - Discontinued Operations, Held-for-sale - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Oct. 25, 2023	Oct. 04, 2023
Brookfield Renewable Partners | Subsequent event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received					$ 1,100
Arclight | Subsequent event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received						$ 243
Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax impairment	$ 169	$ 1,200	$ 220	$ 1,700
Noncontrolling interest balance	$ 1,800			$ 1,600

Dispositions (Balance Sheet) (D

Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets Held for Sale
Total current assets held for sale	$ 440	$ 356
Noncurrent Assets Held for Sale
Total other noncurrent assets held for sale	4,596	5,634
Current Liabilities Associated with Assets Held for Sale
Total current liabilities associated with assets held for sale	589	535
Noncurrent Liabilities Associated with Assets Held for Sale
Total other noncurrent liabilities associated with assets held for sale	1,634	1,927
Discontinued Operations, Held-for-sale | Commercial Renewables
Current Assets Held for Sale
Cash and cash equivalents	70	10
Receivables, net	107	107
Inventory	84	88
Other	179	151
Total current assets held for sale	440	356
Noncurrent Assets Held for Sale
Cost	5,387	6,444
Accumulated depreciation and amortization	(1,651)	(1,651)
Net property, plant and equipment	3,736	4,793
Operating lease right-of-use assets, net	144	140
Investments in equity method unconsolidated affiliates	504	522
Other	212	179
Total other noncurrent assets held for sale	860	841
Total Assets Held for Sale	5,036	5,990
Current Liabilities Associated with Assets Held for Sale
Accounts payable	124	122
Taxes accrued	22	17
Current maturities of long-term debt	268	276
Other	175	120
Total current liabilities associated with assets held for sale	589	535
Noncurrent Liabilities Associated with Assets Held for Sale
Long-Term debt	1,047	1,188
Operating lease liabilities	154	150
Asset retirement obligations	201	190
Other	232	399
Total other noncurrent liabilities associated with assets held for sale	1,634	1,927
Total Liabilities Associated with Assets Held for Sale	$ 2,223	$ 2,462

Dispositions (Income Statement)

Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	$ (152)	$ 3	$ (1,316)	$ (30)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(38)	20	33	92
Net (loss) income from discontinued operations attributable to Duke Energy Corporation	(190)	23	(1,283)	62
Discontinued Operations, Held-for-sale | Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	103	129	293	372
Operation, maintenance and other	93	85	270	248
Depreciation and amortization	0	65	0	193
Property and other taxes	8	10	27	31
Other income and expenses, net	(2)	(1)	(9)	(4)
Interest expense	10	18	53	55
Loss on disposal	169	0	1,603	0
Loss before income taxes	(179)	(50)	(1,669)	(159)
Income tax benefit	(27)	(30)	(353)	(106)
Loss from discontinued operations	(152)	(20)	(1,316)	(53)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(38)	20	33	92
Net (loss) income from discontinued operations attributable to Duke Energy Corporation	$ (190)	$ 0	$ (1,283)	$ 39

Dispositions (Cash Flow Stateme

Dispositions (Cash Flow Statement) (Details) - Commercial Renewables - Discontinued Operations, Held-for-sale - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating activities	$ 545	$ 485
Investing activities	$ (597)	$ (223)

Business Segments (Narrative) (

Business Segments (Narrative) (Details)	9 Months Ended
	Sep. 30, 2023 Segment segment
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Duke Energy Ohio
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2

Business Segments (Business Seg

Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,994	$ 7,842	$ 21,848	$ 21,417
Segment income (loss)	1,403	1,360	3,027	3,032
Less: Noncontrolling interests	(69)	9	(42)	73
Add: Preferred stock dividend	39	39	92	92
Discontinued operations	(190)	23	(1,283)	62
Net Income	1,321	1,413	1,878	3,113
Segment assets	181,160		181,160		$ 178,086
Impairment of assets and other charges	88	(4)	96	202
Operation, maintenance and other	1,428	1,308	4,113	4,223
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	577	628	1,875	1,811
Segment income (loss)	80	103	251	236
Segment assets	11,794		11,794		$ 11,506
Impairment of assets and other charges		(11)		(11)
Operation, maintenance and other	114	121	358	408
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,986	7,835	21,824	21,395
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,695	7,431	20,308	19,552
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	291	404	1,516	1,843
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	8,028	7,866	21,946	21,488
Segment income (loss)	1,462	1,544	3,415	3,514
Segment assets	172,312		172,312
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	577	628	1,875	1,811
Segment income (loss)	82	104	255	239
Segment assets	11,963		11,963
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,715	7,439	20,363	19,576
Segment income (loss)	1,447	1,540	3,088	3,237
Segment assets	155,588		155,588
Impairment of assets and other charges	95		95	211
Operation, maintenance and other	16		16	46
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Supreme Court Ruling
Segment Reporting Information [Line Items]
Less: Noncontrolling interests				(20)
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	472	507	1,411	1,320
Segment income (loss)	65	74	168	152
Segment assets	7,745		7,745
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	313	427	1,583	1,912
Segment income (loss)	15	4	327	277
Segment assets	16,724		16,724
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	105	121	464	491
Segment income (loss)	17	30	87	87
Segment assets	4,218		4,218
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)	(2)	(1)	(4)	(3)
Segment assets	10		10
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	33	30	98	91
Segment income (loss)	(59)	(183)	(388)	(480)
Segment assets	8,848		8,848
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(67)	(54)	(196)	(162)
Segment income (loss)		(1)		(2)
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	(179)		(179)
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	42	31	122	93
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	20	8	55	24
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	22	23	67	69
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	25	23	74	69
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 8	$ 7	$ 24	$ 22

Regulatory Matters (Regulatory

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) - Nuclear Regulatory Commission - contention					9 Months Ended
	Sep. 27, 2021	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Sep. 30, 2023
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
Oconee Nuclear Station Subsequent License Renewal | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Comment period (in days)		60 days
Number of contentions	3
Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
Operating license (in years)			80 years	60 years

Regulatory Matters (Regulator_2

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) - USD ($) $ in Millions			3 Months Ended		4 Months Ended	9 Months Ended		12 Months Ended
	Aug. 22, 2023	Jan. 19, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2026	Sep. 30, 2023	Sep. 30, 2022	Aug. 31, 2026	Aug. 31, 2025	Aug. 31, 2024
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges			$ 88	$ (4)		$ 96	$ 202
Operation, maintenance and other			1,428	1,308		4,113	4,223
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges			64	6		70	(3)
Operation, maintenance and other			$ 424	$ 436		1,285	$ 1,410
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)		3 years
Settlement rate, amount	$ 19,500
Settlement rate, period (in years)	3 years
Impairment of assets and other charges						59
Operation, maintenance and other						$ 8
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount					$ 823			$ 150	$ 172
Requested rate increase (decrease) (as a percent)					15.70%
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Forecast | Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount										$ 501
2023 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Settlement rate, amount	$ 4,600

Regulatory Matters (Regulator_3

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details) - USD ($) $ in Millions

3 Months Ended

7 Months Ended

9 Months Ended

11 Months Ended

12 Months Ended

Aug. 18, 2023

May 31, 2023

Oct. 06, 2022

Sep. 01, 2022

Sep. 30, 2023

Sep. 30, 2022

Dec. 31, 2025

Sep. 30, 2023

Sep. 30, 2022

Apr. 30, 2024

Aug. 17, 2027

Aug. 17, 2026

May 31, 2026

Aug. 17, 2025

May 31, 2025

Aug. 17, 2024

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

$ 88

$ (4)

$ 96

$ 202

Operation, maintenance and other

1,428

1,308

4,113

4,223

Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

24

31

4

Operation, maintenance and other

$ 345

$ 350

1,051

$ 1,101

2022 North Carolina Rate Case | NCUC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Proposed rate period (in years)

3 years

Settlement rate, amount

$ 12,200

Settlement rate, period (in years)

3 years

Approved return on equity percentage (as a percent)

9.80%

Impairment of assets and other charges

28

Operation, maintenance and other

$ 8

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

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

53%

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

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

47%

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

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease), amount

$ 615

$ 138

$ 151

Approved rate increase (decrease), amount

$ 494

$ 135

$ 126

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

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease), amount

$ 326

Approved rate increase (decrease), amount

$ 233

2022 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Settlement rate, amount

$ 3,500

2023 South Carolina Storm Securitization | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Storm costs

$ 171

2022 South Carolina Rate Case | PSCSC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Approved rate increase (decrease), amount

$ 52

2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.60%

Approved rate increase (decrease), amount

$ 36

2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Duke Energy Progress | Equity

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

52.43%

2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Duke Energy Progress | Debt

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

47.57%

2022 South Carolina Rate Case, Coal Ash Basin Closure Costs | PSCSC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Deferred compliance costs period (in years)

7 years

Deferred compliance costs

$ 50

Regulatory Matters (Regulator_4

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Florida) (Details) outage in Millions

12 Months Ended

Oct. 16, 2023 USD ($)

Jan. 23, 2023 USD ($)

Oct. 17, 2022 USD ($)

Oct. 04, 2022 USD ($)

Jun. 15, 2022 USD ($)

May 04, 2021 USD ($)

Jul. 01, 2020 USD ($) plant MW

Dec. 31, 2024 USD ($)

Dec. 31, 2023 USD ($)

Dec. 31, 2022 USD ($)

Sep. 30, 2023 USD ($)

Sep. 29, 2023 USD ($)

Aug. 30, 2023 outage

Jun. 30, 2023 USD ($)

Sep. 28, 2022 outage

Sep. 27, 2022 USD ($)

Apr. 11, 2022 USD ($)

Duke Energy Florida | Solar Project

Public Utilities, General Disclosures [Line Items]

Estimated cost of facilities

$ 1,000,000,000

FPSC | Duke Energy Florida

Public Utilities, General Disclosures [Line Items]

Number of solar plants | plant

10

Generation capacity (MW) | MW

750

2021 Settlement | FPSC | Duke Energy Florida

Public Utilities, General Disclosures [Line Items]

Approved rate increase (decrease), amount

$ 67,000,000

Public utilities, approved equity capital structure, percentage (as a percent)

53%

Public utilities, approved debt capital structure, percentage

47%

Public utilities, basis points, increase, percentage

0.25%

Contract with customer, asset, after allowance for credit loss, noncurrent

$ 154,000,000

$ 173,000,000

$ 94,000,000

Proceeds from legal settlements

$ 180,000,000

Requested rate increase (decrease), amount

$ (56,000,000)

Future investment in infrastructure

$ 1,000,000,000

2021 Settlement | FPSC | Duke Energy Florida | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Public utilities, basis points, increase, percentage

0.50%

2021 Settlement | FPSC | Duke Energy Florida | Minimum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

8.85%

2021 Settlement | FPSC | Duke Energy Florida | Minimum | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.85%

2021 Settlement | FPSC | Duke Energy Florida | Maximum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.85%

2021 Settlement | FPSC | Duke Energy Florida | Maximum | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.10%

2021 Settlement | FPSC | Duke Energy Florida | Weighted Average

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.85%

2021 Settlement | FPSC | Duke Energy Florida | Forecast

Public Utilities, General Disclosures [Line Items]

Approved rate increase (decrease), amount

$ 79,000,000

$ 49,000,000

Contract with customer, asset, after allowance for credit loss, noncurrent

$ 79,000,000

Storm Protection Plan | FPSC | Duke Energy Florida

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

Hurricane Ian

Public Utilities, General Disclosures [Line Items]

Actual storm costs

$ 431,000,000

Hurricane Ian | FPSC | Duke Energy Florida | Hurricane Ian

Public Utilities, General Disclosures [Line Items]

Number of outages | outage

1.1

Deferred storm coats

357,000,000

Storm reserves

$ 132,000,000

$ 107,000,000

Interim recovery payments

$ 442,000,000

Hurricane Idalia | FPSC | Duke Energy Florida | Hurricane Ian | Subsequent event

Public Utilities, General Disclosures [Line Items]

Interim recovery payments

$ 74,000,000

Hurricane Idalia, Retail Portion | FPSC | Duke Energy Florida | Hurricane Ian | Subsequent event

Public Utilities, General Disclosures [Line Items]

Interim recovery payments

92,000,000

Hurricane Idalia | FPSC | Duke Energy Florida | Hurricane Ian

Public Utilities, General Disclosures [Line Items]

Deferred storm coats

$ 96,000,000

Number of impacted customers | outage

0.2

Hurricane Idalia | FPSC | Duke Energy Florida | Hurricane Ian | Subsequent event

Public Utilities, General Disclosures [Line Items]

Interim recovery payments

$ 166,000,000

Regulatory Matters (Regulator_5

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Ohio) (Details) - Duke Energy Ohio - USD ($) $ in Millions								1 Months Ended	9 Months Ended	12 Months Ended
	Oct. 12, 2023	Apr. 28, 2023	Apr. 03, 2023	Mar. 10, 2023	Dec. 01, 2022	Sep. 19, 2022	Oct. 01, 2021	Dec. 31, 2022	Sep. 30, 2023	Dec. 31, 2022
Duke Energy Ohio Electric Base Rate Case | PUCO
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 23	$ 55
Requested return on equity (as a percent)						9.50%	10.30%
Energy Efficiency Cost Recovery | PUCO
Public Utilities, General Disclosures [Line Items]
Revenue									$ 14
Duke Energy Ohio Gas Base Rate Case | PUCO
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 32	$ 49
Requested return on equity (as a percent)		9.60%	10.30%
Requested rate increase (decrease) (as a percent)			5.60%
Duke Energy Ohio Gas Base Rate Case | PUCO | Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount										$ 24
Requested return on equity (as a percent)										9.03%
Duke Energy Ohio Gas Base Rate Case | PUCO | Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount										$ 36
Requested return on equity (as a percent)										10.04%
Equity ratio (as a percent)		52.32%								52.32%
Duke Energy Kentucky Electric Base Rate Case | KPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 31	$ 75
Requested return on equity (as a percent)				9.55%	10.35%
Requested rate increase (decrease) (as a percent)								17.80%
Duke Energy Kentucky Electric Base Rate Case | KPSC | Subsequent event
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount	$ 48
Duke Energy Kentucky Electric Base Rate Case | KPSC | Maximum | Subsequent event
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)	52.145%
Duke Energy Kentucky Electric Base Rate Case, Electric Riders | KPSC | Subsequent event
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)	9.65%
Duke Energy Kentucky Electric Base Rate Case, Electric Base Rates | KPSC | Subsequent event
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)	9.75%

Regulatory Matters (Regulator_6

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Indiana) (Details) - USD ($) $ in Millions

3 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

Jul. 28, 2021

Jun. 29, 2020

Dec. 04, 2019

Jul. 02, 2019

Sep. 30, 2023

Sep. 30, 2022

Jun. 30, 2022

Sep. 30, 2023

Sep. 30, 2022

Dec. 31, 2022

Sep. 20, 2023

Jun. 30, 2023

Feb. 03, 2023

Jun. 15, 2022

Dec. 31, 2020

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

$ 88

$ (4)

$ 96

$ 202

Operating Revenues

7,994

7,842

21,848

21,417

Duke Energy Indiana

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

211

Operating Revenues

$ 851

$ 1,095

$ 2,606

$ 2,835

Indiana Coal Ash Recovery | IURC | Duke Energy Indiana

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

$ 175

Interest rate on refunds (as a percent)

4.71%

TDSIG 2.0 | IURC | Duke Energy Indiana

Public Utilities, General Disclosures [Line Items]

Future investment in infrastructure

$ 2,000

Indiana rate case 2019 | IURC | Duke Energy Indiana

Public Utilities, General Disclosures [Line Items]

Estimated percentage of total rate increase, step one

75%

Requested rate increase (decrease), amount

$ 395

Requested rate increase, percentage, net of tax

15.60%

Requested rate increase (decrease), amended amount

$ 396

Approved rate increase (decrease), amount

$ 146

Rate base

$ 10,200

Reduction of requested rate increase

$ 200

Reduction due to depreciation methodology

50%

Reduction due to approved return on equity

20%

Approved return on equity percentage (as a percent)

9.70%

Requested return on equity (as a percent)

10.40%

Reduction due to earnings adjustments

20%

Estimated percentage of total rate increase, step two

25%

Impairment of assets and other charges

$ 211

Operating Revenues

$ 46

Regulatory Matters, Settlement To Customers

$ 70

$ 70

Regulatory Matters (Regulator_7

Regulatory Matters (Regulatory Matters Narrative - Piedmont) (Details) - Piedmont - Tennessee Annual Review Mechanism - TPUC - USD ($) $ in Millions	Sep. 11, 2023	May 19, 2023	Oct. 10, 2022
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)			9.80%
Requested rate increase (decrease), amount	$ 29	$ 42
Recovery amounts	11
Approved rate increase (decrease), amount	$ 40

Commitments and Contingencies_2

Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 90	$ 84
Duke Energy Carolinas
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	24	22
Progress Energy
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	20	19
Duke Energy Progress
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	10	8
Duke Energy Florida
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	10	11
Duke Energy Ohio
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	36	33
Duke Energy Indiana
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	2	3
Piedmont
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 7	$ 7

Commitments and Contingencies_3

Commitments and Contingencies (Narrative) (Details) $ in Millions	Jun. 16, 2021 people	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Feb. 28, 2021 case
Texas Storm Uri Tort Litigation | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | case				5
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-related Injuries and Damages Claims
Loss Contingencies [Line Items]
Asbestos-related injuries and damages reserves | $		$ 436	$ 457
Probable insurance recoveries | $		572	595
Duke Energy and Duke Energy Carolinas | ASU 2016-13
Loss Contingencies [Line Items]
Reserve for credit losses for insurance receivables | $		$ 9	$ 12

Debt and Credit Facilities (Sum

Debt and Credit Facilities (Summary of Debt Issuances) (Details)	9 Months Ended
	Sep. 30, 2023 USD ($)
Debt Instrument [Line Items]
Debt issuances	$ 8,525,000,000
4.125% April 2023 2023 Notes Due April 2026 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	4.125%
Debt issuances	$ 1,725,000,000
5.400% June 2023 2023 Notes Due June 2023 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	5.40%
Debt issuances	$ 350,000,000
4.95% January 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	4.95%
Debt issuances	$ 900,000,000
5.350% January 2023 Notes Due January 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.35%
Debt issuances	$ 900,000,000
5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.25%
Debt issuances	$ 500,000,000
5.350% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.35%
Debt issuances	$ 500,000,000
5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.25%
Debt issuances	$ 375,000,000
5.650% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.65%
Debt issuances	$ 375,000,000
5.400% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.40%
Debt issuances	$ 500,000,000
4.950% June 2023 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	4.95%
Debt issuances	$ 350,000,000
5.400% June 2023 2023 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.40%
Debt issuances	$ 500,000,000
Maturities Due October 2023
Debt Instrument [Line Items]
Repayments of debt	45,000,000
Maturities Due March 2023
Debt Instrument [Line Items]
Repayments of debt	1,000,000,000
Maturities Due September 2023
Debt Instrument [Line Items]
Repayments of debt	300,000,000
Maturities Due October 2023
Debt Instrument [Line Items]
Repayments of debt	400,000,000
Maturities Due October 2023
Debt Instrument [Line Items]
Repayments of debt	$ 300,000,000
4.960% September 2023 Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	4.96%
Debt issuances	$ 200,000,000
Maturities Due October 2023, Portion
Debt Instrument [Line Items]
Repayments of debt	$ 100,000,000
Sept 2023 5.75% Notes Due Sept 2033 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	5.75%
Debt issuances	$ 600,000,000
Sept 2023 4.300% Notes Due Sept 2053 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.10%
Debt issuances	$ 750,000,000
Duke Energy (Parent)
Debt Instrument [Line Items]
Debt issuances	3,075,000,000
Duke Energy (Parent) | 4.125% April 2023 2023 Notes Due April 2026 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	1,725,000,000
Duke Energy (Parent) | 5.400% June 2023 2023 Notes Due June 2023 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy (Parent) | Sept 2023 5.75% Notes Due Sept 2033 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	600,000,000
Duke Energy (Parent) | Sept 2023 4.300% Notes Due Sept 2053 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	750,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances	2,650,000,000
Duke Energy Carolinas | 4.95% January 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy Carolinas | 5.350% January 2023 Notes Due January 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy Carolinas | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas | 5.350% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas | 5.650% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas | 5.400% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas | 4.950% June 2023 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	350,000,000
Duke Energy Carolinas | 5.400% June 2023 2023 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Carolinas | 4.960% September 2023 Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances	1,000,000,000
Duke Energy Progress | 4.95% January 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 5.350% January 2023 Notes Due January 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress | 5.350% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 5.650% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 5.400% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 4.950% June 2023 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 5.400% June 2023 2023 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | 4.960% September 2023 Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Ohio
Debt Instrument [Line Items]
Debt issuances	750,000,000
Duke Energy Ohio | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	375,000,000
Duke Energy Ohio | 5.650% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	375,000,000
Duke Energy Indiana
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Indiana | 4.95% January 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.350% January 2023 Notes Due January 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.350% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.250% March 2022 Notes Due April 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.650% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.400% March 2022 Notes Due April 2053 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Indiana | 4.950% June 2023 2023 Notes Due January 2033 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 5.400% June 2023 2023 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana | 4.960% September 2023 Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	0
Piedmont
Debt Instrument [Line Items]
Debt issuances	350,000,000
Piedmont | 4.125% April 2023 2023 Notes Due April 2026 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	0
Piedmont | 5.400% June 2023 2023 Notes Due June 2023 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	350,000,000
Duke Energy Florida
Debt Instrument [Line Items]
Debt issuances	200,000,000
Duke Energy Florida | 4.960% September 2023 Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	$ 200,000,000

Debt and Credit Facilities (Nar

Debt and Credit Facilities (Narrative) (Details)				1 Months Ended
	Jun. 30, 2023 day	Apr. 03, 2023	Mar. 09, 2022 USD ($)	Apr. 30, 2023 USD ($) $ / shares	Sep. 30, 2023 USD ($) $ / shares	Mar. 31, 2023 USD ($)	Dec. 31, 2022 $ / shares
Debt Instrument [Line Items]
Sale of debt					$ 8,525,000,000
Common stock, par value (in usd per share) | $ / shares					$ 0.001		$ 0.001
Master Credit Facility
Debt Instrument [Line Items]
Facility size					$ 9,000,000,000	$ 9,000,000,000
June 2017 Three Year Revolving Credit Facility
Debt Instrument [Line Items]
Facility term (in years)			3 years
4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
Interest rate (as a percent)				4.125%
Duke Energy (Parent)
Debt Instrument [Line Items]
Sale of debt					$ 3,075,000,000
Duke Energy (Parent) | 4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
Sale of debt				$ 1,700,000,000
Debt conversion rate (as a percent)		25%
Common stock, par value (in usd per share) | $ / shares				$ 0.001
Conversion ratio				0.0084131
Convertible Debt | 4.25% Convertible Senior notes Due April 2026 | Debt Conversion Terms One
Debt Instrument [Line Items]
Trading days (in days) | day	20
Consecutive trading days (in days) | day	30
Debt conversion rate (as a percent)	130%
Convertible Debt | 4.25% Convertible Senior notes Due April 2026 | Debt Conversion Terms Two
Debt Instrument [Line Items]
Trading days (in days) | day	5
Consecutive trading days (in days) | day	10
Debt conversion rate (as a percent)	98%
Term Loan Facility | Duke Energy (Parent) | Master Credit Facility
Debt Instrument [Line Items]
Facility size			$ 1,400,000,000
Extension period (in years)			2 years

Debt and Credit Facilities (S_2

Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2023	Oct. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current maturities of long-term debt			$ 4,034	$ 3,878
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt			684
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt			$ 175	475
Duke Energy Ohio | Debt Maturing October 2023, 5.813% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			5.813%
Current maturities of long-term debt			$ 150
Duke Energy (Parent) | Debt Maturing October 2023, 3.950% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			3.95%
Current maturities of long-term debt			$ 400
Duke Energy (Parent) | Debt Maturing April 2024, 3.75% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			3.75%
Current maturities of long-term debt			$ 1,000
Duke Energy (Parent) | Debt Maturing March 2024, 6.048% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			6.048%
Current maturities of long-term debt			$ 1,000
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt			$ 1,194	$ 328
Duke Energy Florida | Debt Maturing April 2024, 6.196% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			6.196%
Current maturities of long-term debt			$ 800
Duke Energy Kentucky | Unsecured Debt | Subsequent event
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 75	$ 50
Facility term (in years)	2 years

Debt and Credit Facilities (Sch

Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility - USD ($)	Sep. 30, 2023	Mar. 31, 2023
Line of Credit Facility [Line Items]
Facility size	$ 9,000,000,000	$ 9,000,000,000
Commercial paper	(2,815,000,000)
Outstanding letters of credit	(39,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	6,065,000,000
Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,575,000,000
Commercial paper	(631,000,000)
Outstanding letters of credit	(4,000,000)
Available capacity under the Master Credit Facility	940,000,000
Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	1,400,000,000
Commercial paper	(841,000,000)
Outstanding letters of credit	(1,000,000)
Available capacity under the Master Credit Facility	558,000,000
Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	1,250,000,000
Commercial paper	(292,000,000)
Outstanding letters of credit	(7,000,000)
Available capacity under the Master Credit Facility	951,000,000
Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	750,000,000
Commercial paper	(298,000,000)
Available capacity under the Master Credit Facility	452,000,000
Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(350,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	519,000,000
Piedmont
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(297,000,000)
Available capacity under the Master Credit Facility	503,000,000
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants
Line of Credit Facility [Line Items]
Commercial paper	(625,000,000)
Duke Energy (Parent) | Duke Energy (Parent)
Line of Credit Facility [Line Items]
Facility size	2,275,000,000
Commercial paper	(106,000,000)
Outstanding letters of credit	(27,000,000)
Available capacity under the Master Credit Facility	$ 2,142,000,000

Asset Retirement Obligations (A

Asset Retirement Obligations (ARO by Category) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Asset Retirement Obligations [Line Items]
Total ARO	$ 12,233	$ 12,728
Less: Current portion	620	773
Total noncurrent ARO	11,613	11,955
Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	5,268	5,382
Less: Current portion	238	261
Total noncurrent ARO	5,030	5,121
Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	5,930	6,181
Less: Current portion	261	289
Total noncurrent ARO	5,669	5,892
Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	5,622	5,823
Less: Current portion	260	288
Total noncurrent ARO	5,362	5,535
Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	308	358
Less: Current portion	1	1
Total noncurrent ARO	307	357
Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	138	154
Less: Current portion	8	17
Total noncurrent ARO	130	137
Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	842	951
Less: Current portion	114	207
Total noncurrent ARO	728	744
Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	28	26
Total noncurrent ARO	28	$ 26
Decommissioning of nuclear power facilities
Asset Retirement Obligations [Line Items]
Total ARO	7,459
Decommissioning of nuclear power facilities | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	3,136
Decommissioning of nuclear power facilities | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	4,295
Decommissioning of nuclear power facilities | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	4,069
Decommissioning of nuclear power facilities | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	226
Closure of ash impoundments
Asset Retirement Obligations [Line Items]
Total ARO	4,474
Closure of ash impoundments | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	2,065
Closure of ash impoundments | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	1,530
Closure of ash impoundments | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	1,509
Closure of ash impoundments | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	21
Closure of ash impoundments | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	77
Closure of ash impoundments | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	801
Other
Asset Retirement Obligations [Line Items]
Total ARO	300
Other | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	67
Other | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	105
Other | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	44
Other | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	61
Other | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	61
Other | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	41
Other | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	$ 28

Asset Retirement Obligations _2

Asset Retirement Obligations (ARO Rollforward) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	$ 12,728
Accretion expense	391
Liabilities settled	(494)
Revision in estimates of cash flows	(392)
Balance at end of period	12,233
Duke Energy Carolinas
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	5,382
Accretion expense	189
Liabilities settled	(171)
Revision in estimates of cash flows	(132)
Balance at end of period	5,268
Progress Energy
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	6,181
Accretion expense	178
Liabilities settled	(247)
Revision in estimates of cash flows	(182)
Balance at end of period	5,930
Duke Energy Progress
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	5,823
Accretion expense	169
Liabilities settled	(196)
Revision in estimates of cash flows	(174)
Balance at end of period	5,622
Duke Energy Florida
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	358
Accretion expense	9
Liabilities settled	(51)
Revision in estimates of cash flows	(8)
Balance at end of period	308
Duke Energy Ohio
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	154
Accretion expense	5
Liabilities settled	(11)
Revision in estimates of cash flows	(10)
Balance at end of period	138
Duke Energy Indiana
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	951
Accretion expense	24
Liabilities settled	(66)
Revision in estimates of cash flows	(67)
Balance at end of period	842
Piedmont
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	26
Accretion expense	2
Balance at end of period	$ 28

Goodwill (Details)

Goodwill (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 19,303,000,000	$ 19,303,000,000
Accumulated impairment charges	0	0
Duke Energy Ohio
Goodwill [Line Items]
Goodwill	920,000,000	920,000,000
Accumulated impairment charges	216,000,000	216,000,000
Progress Energy
Goodwill [Line Items]
Goodwill	3,655,000,000	3,655,000,000
Piedmont
Goodwill [Line Items]
Goodwill	49,000,000	49,000,000
Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	17,400,000,000	17,400,000,000
Electric Utilities and Infrastructure | Duke Energy Ohio
Goodwill [Line Items]
Goodwill	596,000,000	596,000,000
Electric Utilities and Infrastructure | Progress Energy
Goodwill [Line Items]
Accumulated impairment charges	0	0
Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	1,900,000,000	1,900,000,000
Gas Utilities and Infrastructure | Duke Energy Ohio
Goodwill [Line Items]
Goodwill	324,000,000	324,000,000
Gas Utilities and Infrastructure | Piedmont
Goodwill [Line Items]
Accumulated impairment charges	$ 0	$ 0

Related Party Transactions (Oth

Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 5,891	$ 5,792	$ 16,679	$ 16,616
Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,675	1,449	4,640	4,226
Duke Energy Carolinas | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	198	193	586	590
Duke Energy Carolinas | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	9	7	26	21
Duke Energy Carolinas | JDA | Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	58	210	121	477
Related party transaction, other revenues from transactions with related party	5	16	26	54
Duke Energy Carolinas | Intercompany natural gas purchases and sales | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	5	14	14
Progress Energy
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	3,038	2,917	8,049	7,839
Progress Energy | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	172	188	522	568
Progress Energy | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	11	10	35	32
Progress Energy | JDA | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	16	26	54
Related party transaction, other revenues from transactions with related party	58	210	121	477
Progress Energy | Intercompany natural gas purchases and sales | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	19	19	56	57
Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,392	1,458	3,845	4,047
Duke Energy Progress | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	103	111	314	338
Duke Energy Progress | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	5	15	15
Duke Energy Progress | JDA | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	16	26	54
Related party transaction, other revenues from transactions with related party	58	210	121	477
Duke Energy Progress | Intercompany natural gas purchases and sales | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	19	19	56	57
Duke Energy Florida
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,642	1,454	4,192	3,779
Duke Energy Florida | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	69	77	208	230
Duke Energy Florida | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	6	5	20	17
Duke Energy Ohio
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	449	479	1,485	1,529
Duke Energy Ohio | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	73	87	222	251
Duke Energy Ohio | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1	2	4	4
Duke Energy Indiana
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	633	913	2,046	2,534
Duke Energy Indiana | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	92	115	275	330
Duke Energy Indiana | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2	2	6	6
Piedmont
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	203	325	781	1,166
Piedmont | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	32	37	107	109
Piedmont | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1	1	3	2
Piedmont | Intercompany natural gas purchases and sales | Related Party
Related Party Transaction [Line Items]
Related party transaction, other revenues from transactions with related party	24	24	70	71
Piedmont | Natural gas storage and transportation costs | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 6	$ 6	$ 18	$ 17

Related Party Transactions (Int

Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax payable	$ 72	$ 37
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax receivable		95
Intercompany income tax payable	138
Duke Energy Progress
Related Party Transaction [Line Items]
Intercompany income tax receivable		36
Intercompany income tax payable	114
Duke Energy Florida
Related Party Transaction [Line Items]
Intercompany income tax receivable		17
Intercompany income tax payable	110
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax payable	18	17
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax payable	20	18
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 24
Intercompany income tax payable		$ 38

Derivatives and Hedging (Notion

Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($) GWh Mcf	Dec. 31, 2022 USD ($) GWh Mcf
Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 4,352	$ 2,877
Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	20,961	14,086
Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	841	909
Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,875	$ 500
Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	2,477	2,377
Duke Energy Carolinas | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 650	$ 1,250
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	276	307
Duke Energy Carolinas | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 650	$ 1,250
Progress Energy | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,500	$ 800
Progress Energy | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	272	292
Progress Energy | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,500	$ 800
Duke Energy Progress | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 500	$ 500
Duke Energy Progress | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	272	292
Duke Energy Progress | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 500	$ 500
Duke Energy Florida | Interest Rate Contracts
Derivative [Line Items]
Notional amount	1,000	300
Duke Energy Florida | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	1,000	300
Duke Energy Indiana | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 300	$ 300
Duke Energy Indiana | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	18,411	12,266
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	21	11
Duke Energy Indiana | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 300	$ 300
Duke Energy Ohio | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Duke Energy Ohio | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	2,550	1,820
Duke Energy Ohio | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Piedmont | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	272	299

Derivatives and Hedging (Foreig

Derivatives and Hedging (Foreign Exchange Risk) (Details) - Foreign Currency Contracts - Designated contracts € in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 1,182		$ 1,182
Receive notional | €					€ 1,100
Fair value gain (loss)	(37)	$ (75)	(19)	$ (104)
Senior Notes, 3.10% Due June 2028
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 645		$ 645
Pay Rate	4.75%		4.75%		4.75%
Receive notional | €					€ 600
Rate	0.0310		0.0310		0.0310
Fair value gain (loss)	$ (20)	(41)	$ (10)	(57)
Senior Notes, 3.85% Due June 2034
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 537		$ 537
Pay Rate	5.31%		5.31%		5.31%
Receive notional | €					€ 500
Rate	0.0385		0.0385		0.0385
Fair value gain (loss)	$ (17)	$ (34)	$ (9)	$ (47)

Derivatives and Hedging (Locati

Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	$ 525	$ 795
Location and fair value amounts of derivatives (Liability)	520	437
Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	161	582
Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	364	213
Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	293	193
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	227	244
Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	143	478
Location and fair value amounts of derivatives (Liability)	490	377
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	382	317
Location and fair value amounts of derivatives (Liability)	1	2
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	29
Equity Securities Contract
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		58
Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	57	265
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	86	213
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	275	175
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	215	202
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	104	216
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	101
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	2
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	177
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		101
Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	18	18
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	11	40
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	93	330
Location and fair value amounts of derivatives (Liability)	204	127
Duke Energy Carolinas | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	37	226
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	56	104
Duke Energy Carolinas | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	156	96
Duke Energy Carolinas | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	48	31
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	51	236
Location and fair value amounts of derivatives (Liability)	204	127
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	42	94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	11	132
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	40	104
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	156	96
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	48	31
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	26	94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	16
Progress Energy
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	196	248
Location and fair value amounts of derivatives (Liability)	137	66
Progress Energy | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	92	140
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	104	108
Progress Energy | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	97	36
Progress Energy | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	40	30
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	60	207
Location and fair value amounts of derivatives (Liability)	137	66
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	136	41
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	14	99
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	46	108
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	97	36
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	40	30
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	78	41
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	58
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	79	230
Location and fair value amounts of derivatives (Liability)	137	48
Duke Energy Progress | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	9	122
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	70	108
Duke Energy Progress | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	97	18
Duke Energy Progress | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	40	30
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	55	207
Location and fair value amounts of derivatives (Liability)	137	48
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	24	23
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	9	99
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	46	108
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	97	18
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	40	30
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		23
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	24
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	117	17
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	83	17
Duke Energy Florida | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	34
Duke Energy Florida | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	5
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	112	17
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	5
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	78	17
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	34
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	5
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Ohio | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	5
Duke Energy Ohio | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	5
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	5
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 (Liability)	1	2
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	55	110
Location and fair value amounts of derivatives (Liability)	4	16
Duke Energy Indiana | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	28	110
Duke Energy Indiana | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	27
Duke Energy Indiana | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	4	16
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	28	29
Location and fair value amounts of derivatives (Liability)	4	16
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	27	81
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	28	29
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	4	16
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		81
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	27
Piedmont
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Location and fair value amounts of derivatives (Liability)	145	168
Piedmont | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Piedmont | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	18	27
Piedmont | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	127	141
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Location and fair value amounts of derivatives (Liability)	145	168
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	18	27
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	$ 127	$ 141

Derivatives and Hedging (Schedu

Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 525	$ 795
Derivative Asset, Current	144	518
Net amounts presented in Current Assets: Other	304	116
Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	161	582
Offset	$ (17)	(33)
Cash collateral received		$ 31
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 364	$ 213
Offset	$ (60)	(59)
Cash collateral received		$ 38
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 93	$ 330
Derivative Asset, Current	28	193
Net amounts presented in Current Assets: Other	24	64
Duke Energy Carolinas | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	37	226
Offset	(9)	(15)
Cash collateral received		18
Duke Energy Carolinas | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	56	104
Offset	(32)	(29)
Cash collateral received		11
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	196	248
Derivative Asset, Current	84	110
Net amounts presented in Current Assets: Other	76	51
Progress Energy | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	92	140
Offset	(8)	(18)
Cash collateral received		12
Progress Energy | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	104	108
Offset	(28)	(30)
Cash collateral received		27
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	79	230
Derivative Asset, Current	1	92
Net amounts presented in Current Assets: Other	42	51
Duke Energy Progress | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	9	122
Offset	(8)	(18)
Cash collateral received		12
Duke Energy Progress | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	70	108
Offset	(28)	(30)
Cash collateral received		27
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	117	17
Derivative Asset, Current	83	17
Net amounts presented in Current Assets: Other	34
Duke Energy Florida | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	83	17
Duke Energy Florida | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	34
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	2	5
Derivative Asset, Current	2	5
Duke Energy Ohio | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	2	5
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	55	110
Derivative Asset, Current	28	110
Net amounts presented in Current Assets: Other	27
Duke Energy Indiana | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	28	$ 110
Duke Energy Indiana | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	27
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1
Derivative Asset, Current	1
Piedmont | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 1

Derivatives and Hedging (Sche_2

Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 520	$ 437
Net amounts presented in Current Liabilities: Other	260	144
Net amounts presented in Current Liabilities: Other	159	185
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	293	193
Offset	(17)	$ (33)
Cash collateral posted	$ (16)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 227	$ 244
Offset	(60)	(59)
Cash collateral posted	$ (8)	$ (16)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other (includes $54 at 2023 related to VIEs)	Other (includes $54 at 2023 related to VIEs)
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 204	$ 127
Net amounts presented in Current Liabilities: Other	135	81
Net amounts presented in Current Liabilities: Other	8	2
Duke Energy Carolinas | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	156	96
Offset	(9)	(15)
Cash collateral posted	(12)
Duke Energy Carolinas | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	48	31
Offset	(33)	(29)
Cash collateral posted	(7)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	137	66
Net amounts presented in Current Liabilities: Other	88	18
Net amounts presented in Current Liabilities: Other	11
Progress Energy | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	97	36
Offset	(8)	(18)
Cash collateral posted	(1)
Progress Energy | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	40	30
Offset	(28)	(30)
Cash collateral posted	(1)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	137	48
Net amounts presented in Current Liabilities: Other	88
Net amounts presented in Current Liabilities: Other	11
Duke Energy Progress | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	97	18
Offset	(8)	(18)
Cash collateral posted	(1)
Duke Energy Progress | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	40	30
Offset	(28)	(30)
Cash collateral posted	(1)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		19
Net amounts presented in Current Liabilities: Other		19
Duke Energy Florida | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		19
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	2
Net amounts presented in Current Liabilities: Other	1	2
Duke Energy Ohio | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	2
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	4	16
Duke Energy Indiana | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	4	16
Cash collateral posted	(4)
Duke Energy Indiana | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Cash collateral posted		(16)
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	145	168
Net amounts presented in Current Liabilities: Other	18	27
Net amounts presented in Current Liabilities: Other	127	141
Piedmont | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	18	27
Piedmont | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 127	$ 141

Derivatives and Hedging (Deriva

Derivatives and Hedging (Derivative Instruments with Credit-Risk Related Contingent Features and Cash Collateral) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	$ 312	$ 141
Fair value of collateral already posted	21
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	291	141
Noncurrent liabilities
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Cash collateral posted	(8)	(16)
Noncurrent assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(60)	(59)
Current assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(17)	(33)
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	175	86
Fair value of collateral already posted	19
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	156	86
Duke Energy Carolinas | Noncurrent liabilities
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Cash collateral posted	(7)
Duke Energy Carolinas | Noncurrent assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(32)	(29)
Duke Energy Carolinas | Current assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(9)	(15)
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	138	55
Fair value of collateral already posted	2
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	136	55
Progress Energy | Noncurrent liabilities
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Cash collateral posted	(1)
Progress Energy | Noncurrent assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(28)	(30)
Progress Energy | Current assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(8)	(18)
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	138	48
Fair value of collateral already posted	2
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	136	48
Duke Energy Progress | Noncurrent liabilities
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Cash collateral posted	(1)
Duke Energy Progress | Noncurrent assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(28)	(30)
Duke Energy Progress | Current assets
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	$ (8)	(18)
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
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered		7
Duke Energy Indiana | Noncurrent liabilities
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Cash collateral posted		$ (16)

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	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale
Estimated Fair Value	$ 2,824
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	4,244	$ 3,682
Unrealized Holding Losses	351	395
Estimated Fair Value	9,691	9,051
NDTF
Cash and Cash Equivalents
Estimated Fair Value	160	215
Equity Securities, FV-NI
Gross Unrealized Holding Gains	4,218	3,658
Gross Unrealized Holding Losses	44	105
Estimated Fair Value	6,530	5,871
Debt Securities, Available-for-sale
Estimated Fair Value	2,569	2,550
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	4,218	3,661
Unrealized Holding Losses	319	359
Estimated Fair Value	9,259	8,636
Other Investments
Cash and Cash Equivalents
Estimated Fair Value	36	22
Equity Securities, FV-NI
Gross Unrealized Holding Gains	26	21
Gross Unrealized Holding Losses	9	16
Estimated Fair Value	141	128
Debt Securities, Available-for-sale
Estimated Fair Value	255	265
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	26	21
Unrealized Holding Losses	32	36
Estimated Fair Value	432	415
Duke Energy Carolinas
Debt Securities, Available-for-sale
Estimated Fair Value	1,329
Duke Energy Carolinas | NDTF
Cash and Cash Equivalents
Estimated Fair Value	59	117
Equity Securities, FV-NI
Gross Unrealized Holding Gains	2,468	2,147
Gross Unrealized Holding Losses	25	51
Estimated Fair Value	3,767	3,367
Debt Securities, Available-for-sale
Estimated Fair Value	1,329	1,298
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,468	2,149
Unrealized Holding Losses	185	192
Estimated Fair Value	5,155	4,782
Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	1,263
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,750	1,512
Unrealized Holding Losses	134	167
Estimated Fair Value	4,135	3,890
Progress Energy | NDTF
Cash and Cash Equivalents
Estimated Fair Value	101	98
Equity Securities, FV-NI
Gross Unrealized Holding Gains	1,750	1,511
Gross Unrealized Holding Losses	19	54
Estimated Fair Value	2,763	2,504
Debt Securities, Available-for-sale
Estimated Fair Value	1,240	1,252
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,750	1,512
Unrealized Holding Losses	134	167
Estimated Fair Value	4,104	3,854
Progress Energy | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	8	11
Debt Securities, Available-for-sale
Estimated Fair Value	23	25
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	31	36
Duke Energy Progress
Debt Securities, Available-for-sale
Estimated Fair Value	971
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,661	1,432
Unrealized Holding Losses	113	142
Estimated Fair Value	3,700	3,439
Duke Energy Progress | NDTF
Cash and Cash Equivalents
Estimated Fair Value	62	56
Equity Securities, FV-NI
Gross Unrealized Holding Gains	1,661	1,431
Gross Unrealized Holding Losses	19	54
Estimated Fair Value	2,663	2,411
Debt Securities, Available-for-sale
Estimated Fair Value	971	963
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,661	1,432
Unrealized Holding Losses	113	142
Estimated Fair Value	3,696	3,430
Duke Energy Progress | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	4	9
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	4	9
Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value	292
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	89	80
Unrealized Holding Losses	21	25
Estimated Fair Value	432	450
Duke Energy Florida | NDTF
Cash and Cash Equivalents
Estimated Fair Value	39	42
Equity Securities, FV-NI
Gross Unrealized Holding Gains	89	80
Estimated Fair Value	100	93
Debt Securities, Available-for-sale
Estimated Fair Value	269	289
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	89	80
Unrealized Holding Losses	21	25
Estimated Fair Value	408	424
Duke Energy Florida | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	1	1
Debt Securities, Available-for-sale
Estimated Fair Value	23	25
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	24	26
Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	59
Duke Energy Indiana | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	3	1
Equity Securities, FV-NI
Gross Unrealized Holding Gains	3	2
Gross Unrealized Holding Losses	9	16
Estimated Fair Value	88	79
Debt Securities, Available-for-sale
Estimated Fair Value	59	60
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	3	2
Unrealized Holding Losses	12	20
Estimated Fair Value	150	140
Corporate debt securities | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	80	85
Estimated Fair Value	612	641
Corporate debt securities | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	10	12
Estimated Fair Value	83	84
Corporate debt securities | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	60	62
Estimated Fair Value	376	401
Corporate debt securities | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	20	23
Estimated Fair Value	236	240
Corporate debt securities | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	19	22
Estimated Fair Value	224	230
Corporate debt securities | Duke Energy Florida | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1	1
Estimated Fair Value	12	10
Corporate debt securities | Duke Energy Indiana | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses		1
Estimated Fair Value	9	8
Municipal bonds | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	41	39
Estimated Fair Value	318	330
Municipal bonds | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	3	3
Estimated Fair Value	74	78
Municipal bonds | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	9	10
Estimated Fair Value	45	64
Municipal bonds | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	32	29
Estimated Fair Value	273	266
Municipal bonds | Progress Energy | Other Investments
Debt Securities, Available-for-sale
Estimated Fair Value	23	25
Municipal bonds | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	32	29
Estimated Fair Value	273	266
Municipal bonds | Duke Energy Florida | Other Investments
Debt Securities, Available-for-sale
Estimated Fair Value	23	25
Municipal bonds | Duke Energy Indiana | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	3	3
Estimated Fair Value	44	45
U.S. government bonds | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Gross Unrealized Holding Losses	136	112
Estimated Fair Value	1,470	1,423
U.S. government bonds | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	5	2
Estimated Fair Value	46	62
U.S. government bonds | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	73	51
Estimated Fair Value	745	685
U.S. government bonds | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	63	61
Estimated Fair Value	725	738
U.S. government bonds | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	43	37
Estimated Fair Value	469	460
U.S. government bonds | Duke Energy Florida | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	20	24
Estimated Fair Value	256	278
U.S. government bonds | Duke Energy Indiana | Other Investments
Debt Securities, Available-for-sale
Estimated Fair Value	6	7
Other debt securities | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	18	18
Estimated Fair Value	169	156
Other debt securities | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	5	3
Estimated Fair Value	52	41
Other debt securities | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	18	18
Estimated Fair Value	163	148
Other debt securities | Progress Energy | NDTF
Debt Securities, Available-for-sale
Estimated Fair Value	6	8
Other debt securities | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Estimated Fair Value	5	7
Other debt securities | Duke Energy Florida | NDTF
Debt Securities, Available-for-sale
Estimated Fair Value	$ 1	$ 1

Investments in Debt and Equit_4

Investments in Debt and Equity Securities (Realized Gains and Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
FV-NI:
Realized gains	$ 61	$ 25	$ 107	$ 170
Realized losses	35	61	117	247
AFS:
Realized gains	16	7	37	22
Realized losses	45	40	104	105
Duke Energy Carolinas
FV-NI:
Realized gains	43	16	70	109
Realized losses	17	39	64	143
AFS:
Realized gains	12	7	21	19
Realized losses	26	20	54	57
Progress Energy
FV-NI:
Realized gains	18	9	37	61
Realized losses	18	22	53	104
AFS:
Realized gains	4		16	3
Realized losses	19	9	50	32
Duke Energy Progress
FV-NI:
Realized gains	15	9	34	60
Realized losses	18	21	52	101
AFS:
Realized gains	4		15	3
Realized losses	$ 18	$ 9	$ 47	$ 29

Investments in Debt and Equit_5

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions	Sep. 30, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 137
Due after one through five years	671
Due after five through 10 years	545
Due after 10 years	1,471
Total	2,824
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	7
Due after one through five years	209
Due after five through 10 years	311
Due after 10 years	802
Total	1,329
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	109
Due after one through five years	388
Due after five through 10 years	197
Due after 10 years	569
Total	1,263
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	21
Due after one through five years	235
Due after five through 10 years	184
Due after 10 years	531
Total	971
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	88
Due after one through five years	153
Due after five through 10 years	13
Due after 10 years	38
Total	292
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	7
Due after one through five years	19
Due after five through 10 years	10
Due after 10 years	23
Total	$ 59

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurement Amounts for Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	$ 2,824
Derivative assets	525	$ 795
Total assets	10,216	9,846
Derivative liabilities	(520)	(437)
Net assets (liabilities)	9,696	9,409
NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	160	215
Estimated Fair Value	6,530	5,871
Debt securities, available-for-sale	2,569	2,550
NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	6,530	5,871
Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	36	22
Estimated Fair Value	141	128
Debt securities, available-for-sale	255	265
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2	1
Total assets	7,625	7,030
Derivative liabilities	(4)	(16)
Net assets (liabilities)	7,621	7,014
Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	160	215
Debt securities, available-for-sale	755	780
Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	6,491	5,829
Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	36	22
Estimated Fair Value	141	128
Debt securities, available-for-sale	40	55
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	493	760
Total assets	2,522	2,740
Derivative liabilities	(516)	(421)
Net assets (liabilities)	2,006	2,319
Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,814	1,770
Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	215	210
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	30	34
Total assets	30	34
Net assets (liabilities)	30	34
Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	39	42
Net assets (liabilities)	39	42
Not Categorized | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	39	42
Duke Energy Carolinas
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,329
Derivative assets	93	330
Total assets	5,248	5,112
Derivative liabilities	(204)	(127)
Net assets (liabilities)	5,044	4,985
Duke Energy Carolinas | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	59	117
Estimated Fair Value	3,767	3,367
Debt securities, available-for-sale	1,329	1,298
Duke Energy Carolinas | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	3,767	3,367
Duke Energy Carolinas | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	4,107	3,765
Net assets (liabilities)	4,107	3,765
Duke Energy Carolinas | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	59	117
Debt securities, available-for-sale	320	323
Duke Energy Carolinas | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	3,728	3,325
Duke Energy Carolinas | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	93	330
Total assets	1,102	1,305
Derivative liabilities	(204)	(127)
Net assets (liabilities)	898	1,178
Duke Energy Carolinas | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,009	975
Duke Energy Carolinas | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	39	42
Net assets (liabilities)	39	42
Duke Energy Carolinas | Not Categorized | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	39	42
Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,263
Derivative assets	196	248
Total assets	4,331	4,138
Derivative liabilities	(137)	(66)
Net assets (liabilities)	4,194	4,072
Progress Energy | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	101	98
Estimated Fair Value	2,763	2,504
Debt securities, available-for-sale	1,240	1,252
Progress Energy | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	2,763	2,504
Progress Energy | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	8	11
Debt securities, available-for-sale	23	25
Progress Energy | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	3,307	3,070
Net assets (liabilities)	3,307	3,070
Progress Energy | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	101	98
Debt securities, available-for-sale	435	457
Progress Energy | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	2,763	2,504
Progress Energy | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	8	11
Progress Energy | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	196	248
Total assets	1,024	1,068
Derivative liabilities	(137)	(66)
Net assets (liabilities)	887	1,002
Progress Energy | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	805	795
Progress Energy | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	23	25
Duke Energy Progress
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	971
Derivative assets	79	230
Total assets	3,779	3,669
Derivative liabilities	(137)	(48)
Net assets (liabilities)	3,642	3,621
Duke Energy Progress | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	62	56
Estimated Fair Value	2,663	2,411
Debt securities, available-for-sale	971	963
Duke Energy Progress | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	2,663	2,411
Duke Energy Progress | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	4	9
Duke Energy Progress | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	2,955	2,701
Net assets (liabilities)	2,955	2,701
Duke Energy Progress | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	62	56
Debt securities, available-for-sale	226	225
Duke Energy Progress | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	2,663	2,411
Duke Energy Progress | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	4	9
Duke Energy Progress | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	79	230
Total assets	824	968
Derivative liabilities	(137)	(48)
Net assets (liabilities)	687	920
Duke Energy Progress | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	745	738
Duke Energy Florida
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	292
Derivative assets	117	17
Total assets	549	467
Derivative liabilities		(19)
Net assets (liabilities)	549	448
Duke Energy Florida | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	39	42
Estimated Fair Value	100	93
Debt securities, available-for-sale	269	289
Duke Energy Florida | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	100	93
Duke Energy Florida | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	1
Debt securities, available-for-sale	23	25
Duke Energy Florida | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	349	368
Net assets (liabilities)	349	368
Duke Energy Florida | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	39	42
Debt securities, available-for-sale	209	232
Duke Energy Florida | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	100	93
Duke Energy Florida | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	1
Duke Energy Florida | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	117	17
Total assets	200	99
Derivative liabilities		(19)
Net assets (liabilities)	200	80
Duke Energy Florida | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	60	57
Duke Energy Florida | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	23	25
Duke Energy Indiana
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	59
Derivative assets	55	110
Total assets	205	250
Derivative liabilities	(4)	(16)
Net assets (liabilities)	201	234
Duke Energy Indiana | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	3	1
Estimated Fair Value	88	79
Debt securities, available-for-sale	59	60
Duke Energy Indiana | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1
Total assets	92	80
Derivative liabilities	(4)	(16)
Net assets (liabilities)	88	64
Duke Energy Indiana | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	3	1
Estimated Fair Value	88	79
Duke Energy Indiana | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	27	81
Total assets	86	141
Net assets (liabilities)	86	141
Duke Energy Indiana | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	59	60
Duke Energy Indiana | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	27	29
Total assets	27	29
Net assets (liabilities)	27	29
Piedmont
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1
Derivative liabilities	(145)	(168)
Net assets (liabilities)	(144)	(168)
Piedmont | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1
Net assets (liabilities)	1
Piedmont | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(145)	(168)
Net assets (liabilities)	$ (145)	$ (168)

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	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivatives (net)
Balance at beginning of period	$ 41	$ 89	$ 34	$ 24
Purchases, sales, issuances and settlements:
Purchases	3		50	77
Settlements	(18)	(21)	(76)	(13)
Total gains (losses) included on the Condensed Consolidated Balance Sheet	4	(8)	22	(28)
Balance at end of period	30	60	30	60
Duke Energy Indiana
Derivatives (net)
Balance at beginning of period	37	84	29	22
Purchases, sales, issuances and settlements:
Purchases			42	74
Settlements	(14)	(20)	(70)	(10)
Total gains (losses) included on the Condensed Consolidated Balance Sheet	4	(8)	26	(30)
Balance at end of period	$ 27	$ 56	$ 27	$ 56

Fair Value Measurements (Quanti

Fair Value Measurements (Quantitative Level 3 Fair Value Disclosures) (Details) $ in Millions	Sep. 30, 2023 USD ($) $ / MWh	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) $ / MWh	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 30	$ 41	$ 34	$ 60	$ 89	$ 24
Duke Energy Ohio | FTRs | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 3		$ 5
Duke Energy Ohio | FTRs | RTO auction pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	0.43		0.89
Duke Energy Ohio | FTRs | RTO auction pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	2.07		6.25
Duke Energy Ohio | FTRs | RTO auction pricing | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	0.77		3.35
Duke Energy Indiana
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 27	$ 37	$ 29	$ 56	$ 84	$ 22
Duke Energy Indiana | FTRs | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 27		$ 29
Duke Energy Indiana | FTRs | RTO auction pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	(1.64)		0.09
Duke Energy Indiana | FTRs | RTO auction pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	12.51		21.79
Duke Energy Indiana | FTRs | RTO auction pricing | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	1.90		2.74

Fair Value Measurements (Other

Fair Value Measurements (Other Fair Value Disclosure) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 75,387	$ 69,751
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	65,070	61,986
Piedmont Natural Gas and Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt discount (premium), net	1,100	1,200
Duke Energy Carolinas | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	15,995	14,266
Duke Energy Carolinas | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	13,973	12,943
Progress Energy | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	23,281	22,439
Progress Energy | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	20,417	20,467
Duke Energy Progress | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	11,718	11,087
Duke Energy Progress | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	9,808	9,689
Duke Energy Florida | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	9,920	9,709
Duke Energy Florida | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	8,892	8,991
Duke Energy Ohio | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,692	3,245
Duke Energy Ohio | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,264	2,927
Duke Energy Indiana | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,504	4,307
Duke Energy Indiana | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,874	3,913
Piedmont | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,713	3,363
Piedmont | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 3,123	$ 2,940

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Details) - VIE primary beneficiary - USD ($)	1 Months Ended	9 Months Ended
	Nov. 30, 2021	Sep. 30, 2023
Variable Interest Entities [Line Items]
Variable interest entity, financial or other support, amount		$ 0
CRC
Variable Interest Entities [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
DECNCSF | Duke Energy Carolinas
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds	$ 237,000,000
DEPNCSF | Duke Energy Progress
Variable Interest Entities [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 ($)	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Long-Term Debt	$ 71,353,000,000	$ 65,873,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Long-Term Debt	15,676,000,000	12,948,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Long-Term Debt	11,497,000,000	10,568,000,000
Duke Energy Florida
Variable Interest Entities [Line Items]
Long-Term Debt	8,726,000,000	9,381,000,000
CRC | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	350,000,000
Long-Term Debt	336,000,000	350,000,000
Accounts receivable from securitization	619,000,000	917,000,000
DERF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	500,000,000
Long-Term Debt	500,000,000	471,000,000
Accounts receivable from securitization	1,028,000,000	928,000,000
DEPR | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	400,000,000
Long-Term Debt	400,000,000	400,000,000
Accounts receivable from securitization	831,000,000	793,000,000
DEFR | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	325,000,000
Long-Term Debt	325,000,000	250,000,000
Accounts receivable from securitization	$ 758,000,000	$ 490,000,000

Variable Interest Entities (S_2

Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,489	$ 3,485
Current Assets: Other	602	973
Other Noncurrent Assets: Regulatory assets	13,745	14,645
Public Utilities, Property, Plant and Equipment, Plant in Service	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Other	3,698	3,400
Current Liabilities: Other	2,087	2,167
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	71,353	65,873
Asset Retirement Obligations, Noncurrent	11,613	11,955
Deferred Credits and Other Liabilities	1,325	1,502
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	749	1,143
Current Assets: Other	129	108
Other Noncurrent Assets: Regulatory assets	2,042	2,422
Public Utilities, Property, Plant and Equipment, Plant in Service	27,581	25,940
Accumulated depreciation and amortization	(6,896)	(6,377)
Other	463	372
Current Liabilities: Other	349	363
Current maturities of long-term debt	1,194	328
Long-Term Debt	8,726	9,381
Asset Retirement Obligations, Noncurrent	307	357
Deferred Credits and Other Liabilities	70	84
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,447	1,095
Current Assets: Other	86	216
Other Noncurrent Assets: Regulatory assets	4,020	4,293
Public Utilities, Property, Plant and Equipment, Plant in Service	56,888	54,650
Accumulated depreciation and amortization	(19,668)	(18,669)
Other	1,087	1,036
Current Liabilities: Other	597	580
Current maturities of long-term debt	19	1,018
Long-Term Debt	15,676	12,948
Asset Retirement Obligations, Noncurrent	5,030	5,121
Deferred Credits and Other Liabilities	565	527
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	946	690
Current Assets: Other	49	174
Other Noncurrent Assets: Regulatory assets	4,406	4,724
Public Utilities, Property, Plant and Equipment, Plant in Service	40,283	38,875
Accumulated depreciation and amortization	(14,869)	(14,201)
Other	693	650
Current Liabilities: Other	452	384
Current maturities of long-term debt	71	369
Long-Term Debt	11,497	10,568
Asset Retirement Obligations, Noncurrent	5,362	5,535
Deferred Credits and Other Liabilities	84	76
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	8	6
Regulatory Assets: Current	58	55
Current Assets: Other	24	41
Other Noncurrent Assets: Regulatory assets	816	826
Current Liabilities: Other	2	9
Current maturities of long-term debt	58	56
Long-Term Debt	832	890
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	5	8
Other Noncurrent Assets: Regulatory assets	199	208
Other	1	1
Current Liabilities: Other	1	3
Current maturities of long-term debt	11	10
Long-Term Debt	208	219
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	16	29
Other Noncurrent Assets: Regulatory assets	653	681
Other	2	2
Current Liabilities: Other	4	8
Current maturities of long-term debt	34	34
Long-Term Debt	$ 680	$ 714

Variable Interest Entities (S_3

Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Receivables from affiliated companies	$ 3,244	$ 3,106
Investments in equity method unconsolidated affiliates	505	455
Other noncurrent assets	3,698	3,400
Total Assets	181,160	178,086
Other current liabilities	2,087	2,167
Other (includes $54 at 2023 related to VIEs)	1,325	1,502
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables from affiliated companies	97	73
Other noncurrent assets	76	71
Total Assets	11,794	11,506
Other current liabilities	72	74
Other (includes $54 at 2023 related to VIEs)	90	96
Duke Energy Ohio | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	155	247
Duke Energy Ohio | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Total Assets	122	198
Net assets	122	198
Duke Energy Ohio | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	122	198
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables from affiliated companies	117	112
Other noncurrent assets	323	254
Total Assets	14,585	14,654
Other current liabilities	157	161
Other (includes $54 at 2023 related to VIEs)	14	65
Duke Energy Indiana | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	154	298
Duke Energy Indiana | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Total Assets	161	317
Net assets	161	317
Duke Energy Indiana | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	161	317
Pipeline Investments | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	61	43
Other noncurrent assets	43	45
Total Assets	104	88
Other current liabilities	18	59
Other (includes $54 at 2023 related to VIEs)	12	47
Total liabilities	30	106
Net assets	$ 74	$ (18)

Variable Interest Entities (Rec

Variable Interest Entities (Receivables Sold) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables sold	$ 334	$ 423
Less: Retained interests	122	198
Net receivables sold	212	225
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables sold	330	508
Less: Retained interests	161	317
Net receivables sold	$ 169	$ 191

Variable Interest Entities (Sal

Variable Interest Entities (Sales and Cash Flows) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Duke Energy Ohio
Sales
Receivables sold	$ 1,973	$ 1,869
Loss recognized on sale	25	11
Cash flows
Cash proceeds from receivables sold	2,024	1,757
Collection fees received	1	1
Return received on retained interests	15	6
Duke Energy Indiana
Sales
Receivables sold	2,453	2,646
Loss recognized on sale	29	15
Cash flows
Cash proceeds from receivables sold	2,580	2,465
Collection fees received	1	1
Return received on retained interests	$ 19	$ 9

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations) (Details) $ in Millions	Sep. 30, 2023 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 142
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, remaining performance obligation, amount	$ 15
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 70
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 36
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 10
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, remaining performance obligation, amount	$ 2
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 8
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
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 132
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, remaining performance obligation, amount	$ 13
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 62
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 36
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 64
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, remaining performance obligation, amount	$ 4
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 16
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 17
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 15
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
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, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 5
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 481
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, remaining performance obligation, amount	$ 17
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 62
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 61
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 51
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 49
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, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 241

Revenue (Remaining Performanc_2

Revenue (Remaining Performance Obligations Total) (Details) $ in Millions	Sep. 30, 2023 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 142
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	10
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	132
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	64
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 481

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 7,977	$ 7,853	$ 21,551	$ 21,373
Revenue from sources other than contracts with customers	17	(11)	297	44
Total operating revenues	7,994	7,842	21,848	21,417
Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	7,675	7,435	20,072	19,503
Total operating revenues	7,695	7,431	20,308	19,552
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,602	3,250	9,193	8,642
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,229	2,077	5,936	5,498
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	912	986	2,630	2,582
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	647	874	1,695	2,129
Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	285	248	618	652
Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	294	412	1,455	1,849
Total operating revenues	291	404	1,516	1,843
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	152	167	838	936
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	88	108	421	504
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	26	34	103	125
Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	28	103	93	284
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			24
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	8	6		21
Duke Energy Carolinas
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,378	2,184	6,116	5,852
Revenue from sources other than contracts with customers	15	(9)	39	(8)
Total operating revenues	2,393	2,175	6,155	5,844
Duke Energy Carolinas | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,378	2,184	6,116	5,852
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	988	887	2,527	2,454
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	779	686	1,974	1,796
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	395	366	1,011	938
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	141	140	402	356
Duke Energy Carolinas | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	75	105	202	308
Progress Energy
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,027	3,869	10,211	10,054
Revenue from sources other than contracts with customers	28	12	104	33
Total operating revenues	4,055	3,881	10,315	10,087
Progress Energy | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,027	3,869	10,211	10,054
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,043	1,719	5,019	4,487
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,089	947	2,844	2,562
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	298	298	844	842
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	422	588	1,064	1,388
Progress Energy | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	175	317	440	775
Duke Energy Progress
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,890	1,967	4,836	5,173
Revenue from sources other than contracts with customers	(4)	2	8	9
Total operating revenues	1,886	1,969	4,844	5,182
Duke Energy Progress | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,890	1,967	4,836	5,173
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	756	670	1,902	1,824
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	467	419	1,194	1,114
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	203	216	560	594
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	364	403	942	1,033
Duke Energy Progress | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	100	259	238	608
Duke Energy Florida
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,137	1,902	5,375	4,881
Revenue from sources other than contracts with customers	27	5	81	9
Total operating revenues	2,164	1,907	5,456	4,890
Duke Energy Florida | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,137	1,902	5,375	4,881
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,287	1,049	3,117	2,663
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	622	528	1,650	1,448
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	95	82	284	248
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	58	185	122	355
Duke Energy Florida | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	75	58	202	167
Duke Energy Ohio
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	572	630	1,846	1,801
Revenue from sources other than contracts with customers	5	(2)	29	10
Total operating revenues	577	628	1,875	1,811
Duke Energy Ohio | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	467	508	1,382	1,309
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	268	249	710	656
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	135	150	411	377
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	28	62	155	130
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12	32	33	90
Duke Energy Ohio | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	24	15	73	56
Duke Energy Ohio | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	105	122	464	492
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	73	88	317	331
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	24	26	113	128
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4	4	19	17
Duke Energy Ohio | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4	4	15	16
Duke Energy Indiana
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	844	1,081	2,559	2,780
Revenue from sources other than contracts with customers	7	14	47	55
Total operating revenues	851	1,095	2,606	2,835
Duke Energy Indiana | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	844	1,081	2,559	2,780
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	303	396	937	1,046
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	224	291	706	760
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	190	260	618	672
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	71	115	195	296
Duke Energy Indiana | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	56	19	103	6
Piedmont
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	199	298	1,016	1,380
Revenue from sources other than contracts with customers	9	8	103	41
Total operating revenues	208	306	1,119	1,421
Piedmont | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	199	298	1,016	1,380
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	80	79	522	605
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	65	82	309	376
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	30	84	108
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	24	69	71
Piedmont | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 8	$ 83	$ 32	$ 220

Revenue (Reserve for Credit Los

Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 199	$ 135	$ 216	$ 121
Cumulative Change in Accounting Principle	203	174	203	174
Write-Offs	(36)	(49)	(121)	(103)
Credit Loss Expense	23	37	62	81
Other Adjustments	17	51	46	75
Ending balance	203	174	203	174
Duke Energy Carolinas
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	57	52	68	42
Cumulative Change in Accounting Principle	56	62	56	62
Write-Offs	(14)	(19)	(54)	(44)
Credit Loss Expense	5	10	18	23
Other Adjustments	8	19	24	41
Ending balance	56	62	56	62
Progress Energy
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	73	52	81	36
Cumulative Change in Accounting Principle	77	67	77	67
Write-Offs	(20)	(26)	(60)	(45)
Credit Loss Expense	15	20	33	39
Other Adjustments	9	21	23	37
Ending balance	77	67	77	67
Duke Energy Progress
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	43	31	44	21
Cumulative Change in Accounting Principle	44	41	44	41
Write-Offs	(11)	(11)	(30)	(18)
Credit Loss Expense	2	5	7	11
Other Adjustments	10	16	23	27
Ending balance	44	41	44	41
Duke Energy Florida
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	30	21	36	16
Cumulative Change in Accounting Principle	34	26	34	26
Write-Offs	(8)	(15)	(28)	(28)
Credit Loss Expense	13	15	26	28
Other Adjustments	(1)	5		10
Ending balance	34	26	34	26
Duke Energy Ohio
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	8	4	6	4
Cumulative Change in Accounting Principle	8	6	8	6
Credit Loss Expense		2	2	2
Ending balance	8	6	8	6
Duke Energy Indiana
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4	3	4	3
Cumulative Change in Accounting Principle	5	4	5	4
Credit Loss Expense	1	1	1	1
Ending balance	5	4	5	4
Piedmont
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	13	15	14	15
Cumulative Change in Accounting Principle	10	14	10	14
Write-Offs	(5)	(4)	(11)	(10)
Credit Loss Expense	2	3	7	9
Ending balance	$ 10	$ 14	$ 10	$ 14

Revenue (Aging of Trade Receiva

Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	$ 977	$ 1,457
Current	2,538	2,347
Deferred Payment Arrangements	104	160
Trade and Other Receivables	4,278	4,631
30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	114	123
60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	53	74
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	258	261
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	234	209
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	356	486
Current	795	577
Deferred Payment Arrangements	31	57
Trade and Other Receivables	1,363	1,334
Duke Energy Carolinas | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	31	23
Duke Energy Carolinas | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	19	25
Duke Energy Carolinas | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	71	96
Duke Energy Carolinas | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	60	70
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	333	355
Current	1,233	1,059
Deferred Payment Arrangements	50	62
Trade and Other Receivables	1,886	1,689
Progress Energy | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	57	61
Progress Energy | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	21	18
Progress Energy | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	121	60
Progress Energy | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	71	74
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	206	232
Current	658	637
Deferred Payment Arrangements	27	35
Trade and Other Receivables	1,004	1,004
Duke Energy Progress | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	38	49
Duke Energy Progress | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	7	9
Duke Energy Progress | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	44	15
Duke Energy Progress | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	24	27
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	127	123
Current	573	417
Deferred Payment Arrangements	23	27
Trade and Other Receivables	880	680
Duke Energy Florida | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	19	12
Duke Energy Florida | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	14	9
Duke Energy Florida | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	77	45
Duke Energy Florida | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	47	47
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	2	20
Current	55	15
Deferred Payment Arrangements	3	4
Trade and Other Receivables	105	79
Duke Energy Ohio | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	95	148
Duke Energy Ohio | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	2	6
Duke Energy Ohio | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	1	3
Duke Energy Ohio | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	5
Duke Energy Ohio | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	37	26
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	27	28
Current	54	52
Trade and Other Receivables	122	116
Duke Energy Indiana | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	156	260
Duke Energy Indiana | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	2
Duke Energy Indiana | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	2	11
Duke Energy Indiana | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	10	17
Duke Energy Indiana | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	24	6
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	8	160
Current	83	265
Deferred Payment Arrangements		1
Trade and Other Receivables	109	450
Piedmont | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	3
Piedmont | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	3	2
Piedmont | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	15
Piedmont | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	$ 5	$ 4

Stockholders' Equity (Earnings

Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Class of Stock [Line Items]
Net Income Available to Duke Energy Corporation Common Stockholders	$ 1,213	$ 1,383	$ 1,744	$ 3,094
Accumulated preferred stock dividends adjustment	12	12	12	12
Less: Impact of participating securities	2	1	4	2
Income from continuing operations available to Duke Energy common stockholders	1,413	1,371	3,035	3,042
(Loss) Income from discontinued operations, net of tax	(152)	3	(1,316)	(30)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(38)	20	33	92
Discontinued operations	$ (190)	$ 23	$ (1,283)	$ 62
Weighted average common shares outstanding – basic (in shares)	771	770	771	770
Weighted average common shares outstanding – diluted (in shares)	771	770	771	770
Basic (in usd per share)	$ 1.83	$ 1.78	$ 3.94	$ 3.95
Diluted (in usd per share)	1.83	1.78	3.94	3.95
EPS from continuing operations available to Duke Energy common stockholders
Basic (usd per share)	(0.24)	0.03	(1.67)	0.08
Diluted (usd per share)	$ (0.24)	$ 0.03	$ (1.67)	$ 0.08
Potentially dilutive items excluded from the calculation (in shares)	2	2	2	2
Common Stock
EPS from continuing operations available to Duke Energy common stockholders
Dividends declared per common share (in usd per share)	$ 1.025	$ 1.005	$ 3.035	$ 2.975
Preferred stock, Series A
EPS from continuing operations available to Duke Energy common stockholders
Dividends declared on preferred stock per depositary share (in usd per share)	0.359	0.359	$ 1.078	1.078
Cumulative dividend rate per annum			5.75%
Liquidation preference per share (in usd per share)	25		$ 25
Preferred stock, Series B
EPS from continuing operations available to Duke Energy common stockholders
Dividends declared on preferred stock per depositary share (in usd per share)	24.375	$ 24.375	$ 48.750	$ 48.750
Cumulative dividend rate per annum			4.875%
Liquidation preference per share (in usd per share)	$ 1,000		$ 1,000

Employee Benefit Plans (Plan Co

Employee Benefit Plans (Plan Contributions) (Details) - Qualified Pension Plans - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
2023000000	$ 100	$ 58
Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
2023000000	26	15
Progress Energy
Defined Benefit Plan Disclosure [Line Items]
2023000000	22	13
Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
2023000000	13	8
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
2023000000	9	5
Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
2023000000	5	3
Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
2023000000	8	5
Piedmont
Defined Benefit Plan Disclosure [Line Items]
2023000000	$ 3	$ 2

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - Qualified Pension Plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 28	$ 39	$ 87	$ 120
Interest cost on projected benefit obligation	86	58	258	175
Expected return on plan assets	(147)	(140)	(441)	(421)
Amortization of actuarial loss	2	24	7	71
Amortization of prior service credit	(3)	(5)	(10)	(14)
Amortization of settlement charges	5	14	14	18
Net periodic pension costs	(29)	(10)	(85)	(51)
Duke Energy Carolinas
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	12	28	38
Interest cost on projected benefit obligation	21	14	63	41
Expected return on plan assets	(40)	(38)	(120)	(114)
Amortization of actuarial loss	0	5	1	15
Amortization of prior service credit	0	(1)	0	(3)
Amortization of settlement charges	3	3	7	6
Net periodic pension costs	(7)	(5)	(21)	(17)
Progress Energy
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	11	25	34
Interest cost on projected benefit obligation	26	19	80	55
Expected return on plan assets	(50)	(46)	(149)	(139)
Amortization of actuarial loss	1	6	3	19
Amortization of settlement charges	1	5	3	6
Net periodic pension costs	(13)	(5)	(38)	(25)
Duke Energy Progress
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	5	6	15	20
Interest cost on projected benefit obligation	12	9	37	25
Expected return on plan assets	(24)	(22)	(70)	(66)
Amortization of actuarial loss	0	3	1	10
Amortization of settlement charges	1	4	3	5
Net periodic pension costs	(6)	0	(14)	(6)
Duke Energy Florida
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	3	4	10	14
Interest cost on projected benefit obligation	14	10	43	30
Expected return on plan assets	(26)	(24)	(78)	(72)
Amortization of actuarial loss	1	3	2	9
Amortization of settlement charges		1	1	1
Net periodic pension costs	(8)	(6)	(22)	(18)
Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	2	3
Interest cost on projected benefit obligation	4	3	13	9
Expected return on plan assets	(6)	(6)	(18)	(17)
Amortization of actuarial loss		2		4
Amortization of settlement charges		2		2
Net periodic pension costs	(1)	2	(3)	1
Duke Energy Indiana
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	3	4	7
Interest cost on projected benefit obligation	6	4	20	14
Expected return on plan assets	(10)	(9)	(30)	(28)
Amortization of actuarial loss	1	3	2	8
Amortization of prior service credit			(1)	(1)
Amortization of settlement charges		1	1	1
Net periodic pension costs	(2)	2	(4)	1
Piedmont
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	3	4
Interest cost on projected benefit obligation	2	2	7	6
Expected return on plan assets	(5)	(6)	(15)	(18)
Amortization of actuarial loss		2		5
Amortization of prior service credit	(1)	(2)	(5)	(6)
Amortization of settlement charges	1	2	3	2
Net periodic pension costs	$ (2)	$ (1)	$ (7)	$ (7)

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rates) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	2.80%	10.10%	9%	8.60%
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]
Effective tax rate	4.90%	5.20%	8%	6.30%
Progress Energy
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	15.70%	15.80%	16.20%	16.20%
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]
Effective tax rate	11.80%	12.90%	13%	13.40%
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]
Effective tax rate	20.80%	18.40%	20.30%	19.40%
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]
Effective tax rate	14.90%	14.20%	15.80%	(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]
Effective tax rate	18.50%	16.80%	17.80%	0.50%
Piedmont
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	26.30%	21.40%	17.20%	9.10%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Favorable tax adjustment	$ (120)