Duke Energy (DUK) 10-Q 7 Nov 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
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	525 South Tryon Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202
City Area Code	800
Local Phone Number	488-3853
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		772,482,405
Entity Central Index Key	0001326160
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
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	525 South Tryon Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202
City Area Code	800
Local Phone Number	488-3853
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	411 Fayetteville Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601
City Area Code	800
Local Phone Number	488-3853
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	411 Fayetteville Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601
City Area Code	800
Local Phone Number	488-3853
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	800
Local Phone Number	488-3853
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	800
Local Phone Number	488-3853
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	800
Local Phone Number	488-3853
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	525 South Tryon Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202
City Area Code	800
Local Phone Number	488-3853
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	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
Senior Notes 3.75% Due 2031
Entity Information [Line Items]
Title of 12(b) Security	3.75% Senior Notes
Trading Symbol	DUK 31A
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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues
Regulated electric	$ 7,775	$ 7,640	$ 21,253	$ 20,140
Regulated natural gas	298	284	1,511	1,497
Nonregulated electric and other	81	70	233	211
Total operating revenues	8,154	7,994	22,997	21,848
Operating Expenses
Operation, maintenance and other	1,409	1,428	4,108	4,113
Depreciation and amortization	1,516	1,353	4,312	3,913
Property and other taxes	383	394	1,162	1,136
Impairment of assets and other charges	(5)	88	39	96
Total operating expenses	6,017	5,891	17,208	16,679
Gain (Loss) on Sales of Other Assets and Other, net	7	8	25	46
Operating Income	2,144	2,111	5,814	5,215
Other Income and Expenses
Equity in earnings of unconsolidated affiliates	15	45	53	85
Other income and expenses, net	166	133	502	431
Total other income and expenses	181	178	555	516
Interest Expense	872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes	1,453	1,515	3,856	3,510
Income Tax Expense From Continuing Operations	163	42	481	316
Income From Continuing Operations	1,290	1,473	3,375	3,194
Income (Loss) From Discontinued Operations, net of tax	25	(152)	12	(1,316)
Net Income	1,315	1,321	3,387	1,878
Less: Net Income Attributable to Noncontrolling Interests	34	69	68	42
Net Income Attributable to Duke Energy Corporation	1,281	1,252	3,319	1,836
Less: Preferred Dividends	39	39	92	92
Less: Preferred Redemption Costs	16	0	16	0
Net Income Available to Duke Energy Corporation Common Stockholders	$ 1,226	$ 1,213	$ 3,211	$ 1,744
Income from continuing operations available to Duke Energy Corporation common stockholders
Basic (in usd per share)	$ 1.57	$ 1.83	$ 4.16	$ 3.94
Diluted (in usd per share)	1.57	1.83	4.16	3.94
Income (loss) from discontinued operations attributable to Duke Energy Corporation common stockholders
Basic (in usd per share)	0.03	(0.24)	0.01	(1.67)
Diluted (in usd per share)	0.03	(0.24)	0.01	(1.67)
Net income available to Duke Energy Corporation common stockholders
Basic (in usd per share)	1.60	1.59	4.17	2.27
Diluted (in usd per share)	$ 1.60	$ 1.59	$ 4.17	$ 2.27
Weighted Average Shares Outstanding
Basic (in shares)	772	771	772	771
Diluted (in shares)	773	771	772	771
Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales	$ 2,644	$ 2,571	$ 7,207	$ 6,987
Cost of natural gas
Operating Expenses
Cost of sales	$ 70	$ 57	$ 380	$ 434

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income		$ 1,315	$ 1,321	$ 3,387	$ 1,878
Other Comprehensive Income (Loss), net of tax
Pension and OPEB adjustments	[1]	1	(1)	17	(1)
Net unrealized (losses) gains on cash flow hedges	[1]	(57)	200	60	206
Reclassification into earnings from cash flow hedges	[1]	(2)	24	(3)	28
Net unrealized (losses) gains on fair value hedges	[1]	(3)	15	(24)	30
Unrealized gains on available-for-sale securities	[1]	7	(6)	4	(2)
Other Comprehensive (Loss) Income, net of tax	[1]	(54)	232	54	261
Comprehensive Income		1,261	1,553	3,441	2,139
Less: Comprehensive Income Attributable to Noncontrolling Interests		34	69	68	42
Comprehensive Income Attributable to Duke Energy		1,227	1,484	3,373	2,097
Less: Preferred Dividends		39	39	92	92
Less: Preferred Redemption Costs		16	0	16	0
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 1,172	$ 1,445	$ 3,265	$ 2,005
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Other comprehensive income, tax expense (benefit)	$ (16)	$ 69	$ 16	$ 78

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Receivables of VIEs (net of allowance for doubtful accounts)	1,971	3,019
Receivable from sales of Commercial Renewables Disposal Groups	545	0
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Assets held for sale	4	14
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,778	13,618
Nuclear decommissioning trust funds	11,511	10,143
Operating lease right-of-use assets, net	1,146	1,092
Investments in equity method unconsolidated affiliates	477	492
Assets held for sale	81	197
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Notes payable and commercial paper	3,947	4,288
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Liabilities associated with assets held for sale	77	122
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Investment tax credits	866	864
Liabilities associated with assets held for sale	85	157
Other (includes $20 at 2024 and $17 at 2023 related to VIEs)	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	45,060	44,920
Retained earnings	3,052	2,235
Accumulated other comprehensive income (loss)	47	(6)
Total Duke Energy Corporation stockholders' equity	49,133	49,112
Noncontrolling interests	1,116	1,075
Total equity	50,249	50,187
Total Liabilities and Equity	183,566	176,893
Variable Interest Entity
Current Assets
Inventory	477	462
Regulatory assets	119	110
Other (includes amounts related to VIEs)	76	90
Other Noncurrent Assets
Regulatory assets	1,716	1,642
Current Liabilities
Accounts payable	212	188
Current maturities of long-term debt	1,012	428
Long-Term Debt (includes amounts related to VIEs)	1,842	3,000
Other Noncurrent Liabilities
Other (includes $20 at 2024 and $17 at 2023 related to VIEs)	33	35
Preferred stock, Series A
Equity
Preferred stock	973	973
Preferred stock, Series B
Equity
Preferred stock	$ 0	$ 989

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Current Assets: Other	447	431
Regulatory assets	13,778	13,618
Accounts payable	3,953	4,228
Current maturities of long-term debt	3,597	2,800
Long-Term Debt	76,524	72,452
Other	$ 1,731	$ 1,393
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)	772,000,000	771,000,000
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)	0	1,000,000
Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	$ 91	$ 150
Inventory	477	462
Regulatory assets	119	110
Current Assets: Other	76	90
Regulatory assets	1,716	1,642
Accounts payable	212	188
Current maturities of long-term debt	1,012	428
Long-Term Debt	1,842	3,000
Other	$ 33	$ 35

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Losses on sales of Commercial Renewables Disposal Groups	22	1,603
Gains on sales of other assets	(25)	(46)
Impairment of assets and other charges	39	96
Deferred income taxes	369	(29)
Equity in earnings of unconsolidated affiliates	(53)	(70)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
Provision for rate refunds	(28)	(59)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	35	29
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Contributions to equity method investments	(8)	(30)
Purchases of debt and equity securities	(3,380)	(2,811)
Proceeds from sales and maturities of debt and equity securities	3,450	2,848
Net proceeds from the sales of other assets	1	130
Other	723	578
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Issuance of common stock	26	0
Redemption of preferred stock	(1,000)	0
Payments for the redemption of long-term debt	(2,833)	(3,097)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days	552	575
Payments for the redemption of short-term debt with original maturities greater than 90 days	(1,025)	(110)
Notes payable and commercial paper	(42)	(1,404)
Contributions from noncontrolling interests	47	278
Dividends paid	(2,411)	(2,438)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	$ 1,604	$ 1,528

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total		Total Equity	Preferred Stock	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, 2022				$ 49,322	$ 1,962	$ 1	$ 44,862	$ 2,637	$ (29)		$ (23)	$ (88)
Beginning Balance (in shares) at Dec. 31, 2022						770
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022													$ 2,531
Beginning Balance (Parent) at Dec. 31, 2022		$ 51,853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[2]	1,786		1,744				1,744					42
Other comprehensive income (loss)		261	[3]	261					264		(2)
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	[4]	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	$ 1	44,886	2,036	235		(25)	(89)
Beginning Balance (in shares) at Sep. 30, 2023						771
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023													2,820
Ending Balance (Parent) at Sep. 30, 2023		51,826
Beginning Balance (Attributable to Parent) at Jun. 30, 2023				48,333	1,962	$ 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)	[2]	1,282		1,213				1,213					69
Other comprehensive income (loss)		232	[3]	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		30											30
Distributions to noncontrolling interest in subsidiaries		(20)											(20)
Other		2		(1)			(2)						3
Ending Balance (Attributable to Parent) at Sep. 30, 2023				49,006	1,962	$ 1	44,886	2,036	235		(25)	(89)
Beginning Balance (in shares) at Sep. 30, 2023						771
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023													2,820
Ending Balance (Parent) at Sep. 30, 2023		51,826
Beginning Balance (Attributable to Parent) at Dec. 31, 2023		$ 49,112		49,112	1,962	$ 1	44,920	2,235	98		(15)	(89)
Beginning Balance (in shares) at Dec. 31, 2023		771				771
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2023		$ 1,075											1,075
Beginning Balance (Parent) at Dec. 31, 2023		50,187
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[2]	3,279		3,211				3,211					68
Other comprehensive income (loss)		54	[3]	54					33		4	17
Common stock issuances, including dividend reinvestment and employee benefits (in shares)						1
Common stock issuances, including dividend reinvestment and employee benefits		139		139			139
Preferred stock, Series B, redemption		(989)		(989)	(989)
Common stock dividends		(2,392)		(2,392)				(2,392)
Sale of Commercial Renewables Disposal Groups	[5]	(51)											(51)
Contributions from noncontrolling interests, net of transaction costs		47	[4]										47
Distributions to noncontrolling interest in subsidiaries		(23)											(23)
Other		(2)		(2)			1	(2)				(1)
Ending Balance (Attributable to Parent) at Sep. 30, 2024		$ 49,133		49,133	973	$ 1	45,060	3,052	131		(11)	(73)
Beginning Balance (in shares) at Sep. 30, 2024		772				772
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2024		$ 1,116											1,116
Ending Balance (Parent) at Sep. 30, 2024		50,249
Beginning Balance (Attributable to Parent) at Jun. 30, 2024				49,707	1,962	$ 1	45,007	2,635	193		(18)	(73)
Beginning Balance (in shares) at Jun. 30, 2024						772
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2024													1,099
Beginning Balance (Parent) at Jun. 30, 2024		50,806
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[2]	1,260		1,226				1,226					34
Other comprehensive income (loss)		(54)	[3]	(54)					(62)		7	1
Common stock issuances, including dividend reinvestment and employee benefits														$ 53	$ 53	$ 53
Preferred stock, Series B, redemption		(989)		(989)	(989)
Common stock dividends		(806)		(806)				(806)
Distributions to noncontrolling interest in subsidiaries		(18)											(18)
Other		(3)		(4)				(3)				(1)	1
Ending Balance (Attributable to Parent) at Sep. 30, 2024		$ 49,133		$ 49,133	$ 973	$ 1	$ 45,060	$ 3,052	$ 131		$ (11)	$ (73)
Beginning Balance (in shares) at Sep. 30, 2024		772				772
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2024		$ 1,116											$ 1,116
Ending Balance (Parent) at Sep. 30, 2024		$ 50,249
[1] See Duke Energy Condensed Consolidated Statements of Comprehensive Income for detailed activity related to Cash Flow and Fair Value hedges. Net income available to Duke Energy Corporation Common Stockholders reflects preferred dividends and, for 2024, the $16 million preferred stock redemption costs. Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively. Relates primarily to tax equity financing activity in the Commercial Renewables Disposal Groups. See Note 2 for additional information.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Changes in Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Stockholders' Equity [Abstract]
Preferred stock redemption premium	$ 16	$ 0	$ 16	$ 0

Condensed Consolidated Statem_7

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Carolinas - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues	$ 8,154	$ 7,994	$ 22,997	$ 21,848
Operating Expenses
Operation, maintenance and other	1,409	1,428	4,108	4,113
Depreciation and amortization	1,516	1,353	4,312	3,913
Property and other taxes	383	394	1,162	1,136
Impairment of assets and other charges	(5)	88	39	96
Total operating expenses	6,017	5,891	17,208	16,679
Gain (Loss) on Sales of Other Assets and Other, net	7	8	25	46
Operating Income	2,144	2,111	5,814	5,215
Other Income and Expenses, net	181	178	555	516
Interest Expense	872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes	1,453	1,515	3,856	3,510
Income Tax Expense From Continuing Operations	163	42	481	316
Comprehensive Income Attributable to Duke Energy	1,227	1,484	3,373	2,097
Net Income Attributable to Duke Energy Corporation	1,281	1,252	3,319	1,836
Duke Energy Carolinas
Operating Revenues	2,707	2,393	7,411	6,155
Operating Expenses
Cost of sales	922	690	2,531	1,823
Operation, maintenance and other	463	424	1,358	1,285
Depreciation and amortization	472	407	1,306	1,186
Property and other taxes	88	90	271	276
Impairment of assets and other charges	(2)	64	32	70
Total operating expenses	1,943	1,675	5,498	4,640
Gain (Loss) on Sales of Other Assets and Other, net	0	0	1	26
Operating Income	764	718	1,914	1,541
Other Income and Expenses, net	58	63	181	181
Interest Expense	189	172	537	504
Income From Continuing Operations Before Income Taxes	633	609	1,558	1,218
Income Tax Expense From Continuing Operations	49	30	153	97
Comprehensive Income Attributable to Duke Energy	584	579	1,405	1,121
Net Income Attributable to Duke Energy Corporation	$ 584	$ 579	$ 1,405	$ 1,121

Condensed Consolidated Balanc_3

Condensed Consolidated Balance Sheets - Duke Energy Carolinas - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Receivables of VIEs (net of allowance for doubtful accounts)	1,971	3,019
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Regulatory assets	13,778	13,618
Nuclear decommissioning trust funds	11,511	10,143
Operating lease right-of-use assets, net	1,146	1,092
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Investment tax credits	866	864
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Accumulated other comprehensive income (loss)	47	(6)
Total Liabilities and Equity	183,566	176,893
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	13	9
Receivables (net of allowance for doubtful accounts)	250	265
Receivables of VIEs (net of allowance for doubtful accounts)	1,149	991
Inventory	1,482	1,484
Regulatory assets	927	1,564
Other (includes amounts related to VIEs)	48	31
Total current assets	4,248	4,547
Property, Plant and Equipment
Cost	58,465	56,670
Accumulated depreciation and amortization	(20,026)	(19,896)
Net property, plant and equipment	38,439	36,774
Other Noncurrent Assets
Regulatory assets	3,867	3,916
Nuclear decommissioning trust funds	6,505	5,686
Operating lease right-of-use assets, net	85	78
Other	1,165	1,109
Total other noncurrent assets	11,622	10,789
Total Assets	54,309	52,110
Current Liabilities
Accounts payable	1,302	1,183
Taxes accrued	386	281
Interest accrued	158	179
Current maturities of long-term debt	520	19
Asset retirement obligations	253	224
Regulatory liabilities	576	587
Other	589	702
Total current liabilities	4,014	4,038
Long-Term Debt (includes amounts related to VIEs)	16,212	15,693
Other Noncurrent Liabilities
Deferred income taxes	4,084	4,379
Asset retirement obligations	3,727	3,789
Regulatory liabilities	6,586	5,990
Operating lease liabilities	75	75
Accrued pension and other post-retirement benefit costs	45	57
Investment tax credits	302	301
Other	652	581
Total other noncurrent liabilities	15,471	15,172
Commitments and Contingencies
Equity
Member's equity	18,318	16,913
Accumulated other comprehensive income (loss)	(6)	(6)
Total equity	18,312	16,907
Total Liabilities and Equity	54,309	52,110
Duke Energy Carolinas | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	202	203
Current Liabilities
Accounts payable	230	195
Notes payable to affiliated companies	0	668
Long-Term Debt (includes amounts related to VIEs)	300	300
Duke Energy Carolinas | Affiliated Entity | Notes Receivable
Current Assets
Receivables (net of allowance for doubtful accounts)	$ 177	$ 0

Condensed Consolidated Balanc_4

Condensed Consolidated Balance Sheets - Duke Energy Carolinas (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Regulatory assets	2,300	3,648
Current Assets: Other	447	431
Regulatory assets	13,778	13,618
Current maturities of long-term debt	3,597	2,800
Long-Term Debt	76,524	72,452
Other	1,731	1,393
Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	91	150
Regulatory assets	119	110
Current Assets: Other	76	90
Regulatory assets	1,716	1,642
Current maturities of long-term debt	1,012	428
Long-Term Debt	1,842	3,000
Other	33	35
Duke Energy Carolinas
Allowance for doubtful accounts - receivables	17	11
Allowance for doubtful accounts of VIEs - receivables	53	45
Regulatory assets	927	1,564
Current Assets: Other	48	31
Regulatory assets	3,867	3,916
Current maturities of long-term debt	520	19
Long-Term Debt	16,212	15,693
Other	652	581
Duke Energy Carolinas | Variable Interest Entity
Regulatory assets	12	12
Current Assets: Other	6	9
Regulatory assets	188	196
Current maturities of long-term debt	510	10
Long-Term Debt	198	708
Other	$ 20	$ 17

Condensed Consolidated Statem_8

Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Gains on sales of other assets	(25)	(46)
Impairment of assets and other charges	39	96
Deferred income taxes	369	(29)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
Provision for rate refunds	(28)	(59)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Purchases of debt and equity securities	(3,380)	(2,811)
Proceeds from sales and maturities of debt and equity securities	3,450	2,848
Net proceeds from the sales of other assets	1	130
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	1,405	1,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,504	1,380
Equity component of AFUDC	(85)	(69)
Gains on sales of other assets	0	(26)
Impairment of assets and other charges	32	70
Deferred income taxes	(105)	(7)
Contributions to qualified pension plans	(26)	(26)
Payments for asset retirement obligations	(131)	(145)
Provision for rate refunds	(7)	(35)
(Increase) decrease in
Receivables	(136)	(4)
Receivables from affiliated companies	1	225
Inventory	2	(257)
Other current assets	(3)	(439)
Increase (decrease) in
Accounts payable	149	(523)
Accounts payable to affiliated companies	35	12
Taxes accrued	105	121
Other current liabilities	(226)	(48)
Other assets	652	526
Other liabilities	(121)	105
Net cash provided by operating activities	3,045	1,981
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,923)	(2,646)
Purchases of debt and equity securities	(1,712)	(1,594)
Proceeds from sales and maturities of debt and equity securities	1,712	1,594
Net proceeds from the sales of other assets	0	30
Notes receivable from affiliated companies	(177)	0
Other	(289)	(215)
Net cash used in investing activities	(3,389)	(2,831)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,031	2,764
Payments for the redemption of long-term debt	(17)	(1,040)
Notes payable to affiliated companies	(668)	(902)
Other	(1)	(1)
Net cash provided by financing activities	345	821
Net increase (decrease) in cash, cash equivalents and restricted cash	1	(29)
Cash, cash equivalents and restricted cash at beginning of period	19	53
Cash, cash equivalents and restricted cash at end of period	20	24
Significant non-cash transactions:
Accrued capital expenditures	$ 611	$ 534

Condensed Consolidated Statem_9

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, 2022		$ 15,442	$ 15,448	$ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,836	1,121	1,121
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
Other	2	(3)	(3)
Ending balance at Sep. 30, 2023		16,560	16,566	(6)
Beginning balance at Dec. 31, 2023		16,907	16,913	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,319	1,405	1,405
Other	(2)
Ending balance at Sep. 30, 2024		18,312	18,318	(6)
Beginning balance at Jun. 30, 2024		17,708	17,714	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,281	584	584
Other	$ (3)	20	20
Ending balance at Sep. 30, 2024		$ 18,312	$ 18,318	$ (6)

Condensed Consolidated State_10

Condensed Consolidated Statements of Operations and Comprehensive Income - Progress Energy - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues		$ 8,154	$ 7,994	$ 22,997	$ 21,848
Operating Expenses
Operation, maintenance and other		1,409	1,428	4,108	4,113
Depreciation and amortization		1,516	1,353	4,312	3,913
Property and other taxes		383	394	1,162	1,136
Impairment of assets and other charges		(5)	88	39	96
Total operating expenses		6,017	5,891	17,208	16,679
Gain (Loss) on Sales of Other Assets and Other, net		7	8	25	46
Operating Income		2,144	2,111	5,814	5,215
Other Income and Expenses, net		181	178	555	516
Interest Expense		872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes		1,453	1,515	3,856	3,510
Income Tax Expense From Continuing Operations		163	42	481	316
Net Income Attributable to Duke Energy Corporation		1,281	1,252	3,319	1,836
Unrealized gains on available-for-sale securities	[1]	7	(6)	4	(2)
Other Comprehensive (Loss) Income, net of tax	[1]	(54)	232	54	261
Comprehensive Income		1,261	1,553	3,441	2,139
Progress Energy
Operating Revenues		3,860	4,055	10,445	10,315
Operating Expenses
Cost of sales		1,384	1,535	3,729	3,902
Operation, maintenance and other		653	711	1,869	1,963
Depreciation and amortization		640	563	1,795	1,609
Property and other taxes		170	205	494	546
Impairment of assets and other charges		(3)	24	6	29
Total operating expenses		2,844	3,038	7,893	8,049
Gain (Loss) on Sales of Other Assets and Other, net		7	8	20	20
Operating Income		1,023	1,025	2,572	2,286
Other Income and Expenses, net		56	49	178	146
Interest Expense		271	241	796	706
Income From Continuing Operations Before Income Taxes		808	833	1,954	1,726
Income Tax Expense From Continuing Operations		130	131	320	280
Net Income Attributable to Duke Energy Corporation		678	702	1,634	1,446
Unrealized gains on available-for-sale securities		1	0	1	2
Other Comprehensive (Loss) Income, net of tax		1	0	1	2
Comprehensive Income		$ 679	$ 702	$ 1,635	$ 1,448
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.

Condensed Consolidated Balanc_5

Condensed Consolidated Balance Sheets - Progress Energy - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Receivables of VIEs (net of allowance for doubtful accounts)	1,971	3,019
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,778	13,618
Nuclear decommissioning trust funds	11,511	10,143
Operating lease right-of-use assets, net	1,146	1,092
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Investment tax credits	866	864
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	45,060	44,920
Retained earnings	3,052	2,235
Accumulated other comprehensive income (loss)	47	(6)
Total Duke Energy Corporation stockholders' equity	49,133	49,112
Total Liabilities and Equity	183,566	176,893
Variable Interest Entity
Current Assets
Inventory	477	462
Regulatory assets	119	110
Other (includes amounts related to VIEs)	76	90
Other Noncurrent Assets
Regulatory assets	1,716	1,642
Current Liabilities
Accounts payable	212	188
Current maturities of long-term debt	1,012	428
Long-Term Debt (includes amounts related to VIEs)	1,842	3,000
Other Noncurrent Liabilities
Other	33	35
Progress Energy
Current Assets
Cash and cash equivalents	82	59
Receivables (net of allowance for doubtful accounts)	939	225
Receivables of VIEs (net of allowance for doubtful accounts)	822	1,365
Inventory	2,006	1,901
Regulatory assets	952	1,661
Other (includes amounts related to VIEs)	103	134
Total current assets	4,916	5,435
Property, Plant and Equipment
Cost	71,653	67,644
Accumulated depreciation and amortization	(23,450)	(22,300)
Net property, plant and equipment	48,203	45,344
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets	6,560	6,430
Nuclear decommissioning trust funds	5,005	4,457
Operating lease right-of-use assets, net	643	617
Other	1,269	1,156
Total other noncurrent assets	17,132	16,315
Total Assets	70,251	67,094
Current Liabilities
Accounts payable	1,386	1,374
Taxes accrued	435	259
Interest accrued	242	224
Current maturities of long-term debt	1,418	661
Asset retirement obligations	227	245
Regulatory liabilities	377	418
Other	801	860
Total current liabilities	6,242	5,548
Long-Term Debt (includes amounts related to VIEs)	22,646	22,948
Other Noncurrent Liabilities
Deferred income taxes	5,221	5,197
Asset retirement obligations	4,496	3,900
Regulatory liabilities	5,478	5,083
Operating lease liabilities	570	544
Accrued pension and other post-retirement benefit costs	251	266
Investment tax credits	372	371
Other	455	227
Total other noncurrent liabilities	16,843	15,588
Commitments and Contingencies
Equity
Common stock	0	0
Additional paid-in capital	11,830	11,830
Retained earnings	12,549	11,040
Accumulated other comprehensive income (loss)	(9)	(10)
Total Duke Energy Corporation stockholders' equity	24,370	22,860
Total Liabilities and Equity	70,251	67,094
Progress Energy | Variable Interest Entity
Current Assets
Inventory	477	462
Regulatory assets	107	98
Other (includes amounts related to VIEs)	46	68
Other Noncurrent Assets
Regulatory assets	1,528	1,446
Current Liabilities
Accounts payable	199	188
Current maturities of long-term debt	502	418
Long-Term Debt (includes amounts related to VIEs)	1,581	1,910
Other Noncurrent Liabilities
Other	13	19
Progress Energy | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	12	90
Current Liabilities
Accounts payable	551	464
Notes payable to affiliated companies	805	1,043
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, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Current Assets: Other	447	431
Regulatory assets	13,778	13,618
Accounts payable	3,953	4,228
Current maturities of long-term debt	3,597	2,800
Long-Term Debt	76,524	72,452
Other	$ 1,731	$ 1,393
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)	772,000,000	771,000,000
Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	$ 91	$ 150
Inventory	477	462
Regulatory assets	119	110
Current Assets: Other	76	90
Regulatory assets	1,716	1,642
Accounts payable	212	188
Current maturities of long-term debt	1,012	428
Long-Term Debt	1,842	3,000
Other	33	35
Progress Energy
Allowance for doubtful accounts - receivables	41	18
Inventory	2,006	1,901
Regulatory assets	952	1,661
Current Assets: Other	103	134
Regulatory assets	6,560	6,430
Accounts payable	1,386	1,374
Current maturities of long-term debt	1,418	661
Long-Term Debt	22,646	22,948
Other	$ 455	$ 227
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
Progress Energy | Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	$ 38	$ 56
Inventory	477	462
Regulatory assets	107	98
Current Assets: Other	46	68
Regulatory assets	1,528	1,446
Accounts payable	199	188
Current maturities of long-term debt	502	418
Long-Term Debt	1,581	1,910
Other	$ 13	$ 19

Condensed Consolidated State_11

Condensed Consolidated Statements of Cash Flows - Progress Energy - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Impairment of assets and other charges	39	96
Deferred income taxes	369	(29)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
Provision for rate refunds	(28)	(59)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Purchases of debt and equity securities	(3,380)	(2,811)
Proceeds from sales and maturities of debt and equity securities	3,450	2,848
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	1,634	1,446
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,081	2,021
Equity component of AFUDC	(54)	(49)
Impairment of assets and other charges	6	29
Deferred income taxes	(19)	(38)
Contributions to qualified pension plans	(23)	(22)
Payments for asset retirement obligations	(221)	(212)
Provision for rate refunds	(1)	(24)
(Increase) decrease in
Receivables	(185)	(198)
Receivables from affiliated companies	78	2
Inventory	(95)	(224)
Other current assets	841	399
Increase (decrease) in
Accounts payable	194	(177)
Accounts payable to affiliated companies	87	(206)
Taxes accrued	179	357
Other current liabilities	12	4
Other assets	(504)	183
Other liabilities	127	(10)
Net cash provided by operating activities	4,137	3,281
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(3,891)	(3,607)
Purchases of debt and equity securities	(1,561)	(1,108)
Proceeds from sales and maturities of debt and equity securities	1,644	1,151
Other	(351)	(239)
Net cash used in investing activities	(4,159)	(3,803)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	849	1,272
Payments for the redemption of long-term debt	(460)	(440)
Notes payable to affiliated companies	(238)	140
Dividends to parent	(125)	(500)
Other	(1)	(1)
Net cash provided by financing activities	25	471
Net increase (decrease) in cash, cash equivalents and restricted cash	3	(51)
Cash, cash equivalents and restricted cash at beginning of period	135	184
Cash, cash equivalents and restricted cash at end of period	138	133
Significant non-cash transactions:
Accrued capital expenditures	$ 628	$ 558

Condensed Consolidated State_12

Condensed Consolidated Statements of Changes in Equity - Progress Energy - USD ($) $ in Millions	Total		Additional Paid-in Capital	Retained Earnings	Net Unrealized Gains (Losses) on Available-for-Sale Securities	Pension and OPEB Adjustments	Total Equity	Progress Energy	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
Beginning Balance (Attributable to Parent) at Dec. 31, 2022			$ 44,862	$ 2,637	$ (23)	$ (88)	$ 49,322		$ 11,832	$ 9,585	$ (1)	$ (8)	$ (2)
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
Other comprehensive income (loss)	261	[1]			(2)		261	2				2
Distributions to parent	(2,346)			(2,346)			(2,346)	(500)		(500)
Other	(1)		(6)	1			(5)	(3)	(2)	(1)
Ending Balance (Attributable to Parent) at Sep. 30, 2023			44,886	2,036	(25)	(89)	49,006		11,830	10,530	(1)	(6)	(2)
Ending Balance (Parent) at Sep. 30, 2023	51,826							22,351
Beginning Balance (Attributable to Parent) at Jun. 30, 2023			44,866	1,615	(19)	(88)	48,333		11,830	10,329	(1)	(6)	(2)
Beginning Balance (Parent) at Jun. 30, 2023	51,071							22,150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,321							702		702
Other comprehensive income (loss)	232	[1]			(6)	(1)	232	0
Distributions to parent	(793)			(793)			(793)	(500)		(500)
Other	2		(2)				(1)	(1)		(1)
Ending Balance (Attributable to Parent) at Sep. 30, 2023			44,886	2,036	(25)	(89)	49,006		11,830	10,530	(1)	(6)	(2)
Ending Balance (Parent) at Sep. 30, 2023	51,826							22,351
Beginning Balance (Attributable to Parent) at Dec. 31, 2023	49,112		44,920	2,235	(15)	(89)	49,112	22,860	11,830	11,040	(1)	(5)	(4)
Beginning Balance (Parent) at Dec. 31, 2023	50,187							22,860
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,387							1,634		1,634
Other comprehensive income (loss)	54	[1]			4	17	54	1				1
Distributions to parent	(2,392)			(2,392)			(2,392)	(125)		(125)
Other	(2)		1	(2)		(1)	(2)
Ending Balance (Attributable to Parent) at Sep. 30, 2024	49,133		45,060	3,052	(11)	(73)	49,133	24,370	11,830	12,549	(1)	(4)	(4)
Ending Balance (Parent) at Sep. 30, 2024	50,249							24,370
Beginning Balance (Attributable to Parent) at Jun. 30, 2024			45,007	2,635	(18)	(73)	49,707		11,849	11,996	(1)	(5)	(4)
Beginning Balance (Parent) at Jun. 30, 2024	50,806							23,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,315							678		678
Other comprehensive income (loss)	(54)	[1]			7	1	(54)	1				1
Distributions to parent	(806)			(806)			(806)	(125)		(125)
Other	(3)			(3)		(1)	(4)	(19)	(19)
Ending Balance (Attributable to Parent) at Sep. 30, 2024	49,133		$ 45,060	$ 3,052	$ (11)	$ (73)	$ 49,133	24,370	$ 11,830	$ 12,549	$ (1)	$ (4)	$ (4)
Ending Balance (Parent) at Sep. 30, 2024	$ 50,249							$ 24,370
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.

Condensed Consolidated State_13

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Progress - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues	$ 8,154	$ 7,994	$ 22,997	$ 21,848
Operating Expenses
Operation, maintenance and other	1,409	1,428	4,108	4,113
Depreciation and amortization	1,516	1,353	4,312	3,913
Property and other taxes	383	394	1,162	1,136
Impairment of assets and other charges	(5)	88	39	96
Total operating expenses	6,017	5,891	17,208	16,679
Gain (Loss) on Sales of Other Assets and Other, net	7	8	25	46
Operating Income	2,144	2,111	5,814	5,215
Other Income and Expenses, net	181	178	555	516
Interest Expense	872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes	1,453	1,515	3,856	3,510
Income Tax Expense	163	42	481	316
Comprehensive Income Attributable to Duke Energy	1,227	1,484	3,373	2,097
Net Income Attributable to Duke Energy Corporation	1,281	1,252	3,319	1,836
Duke Energy Progress
Operating Revenues	1,914	1,886	5,338	4,844
Operating Expenses
Cost of sales	679	651	1,896	1,685
Operation, maintenance and other	376	345	1,077	1,051
Depreciation and amortization	354	324	999	935
Property and other taxes	43	48	144	143
Impairment of assets and other charges	(3)	24	6	31
Total operating expenses	1,449	1,392	4,122	3,845
Gain (Loss) on Sales of Other Assets and Other, net	1	1	2	2
Operating Income	466	495	1,218	1,001
Other Income and Expenses, net	34	31	107	92
Interest Expense	127	109	370	315
Income From Continuing Operations Before Income Taxes	373	417	955	778
Income Tax Expense	48	49	135	101
Comprehensive Income Attributable to Duke Energy	325	368	820	677
Net Income Attributable to Duke Energy Corporation	$ 325	$ 368	$ 820	$ 677

Condensed Consolidated Balanc_7

Condensed Consolidated Balance Sheets - Duke Energy Progress - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Receivables of VIEs (net of allowance for doubtful accounts)	1,971	3,019
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Regulatory assets	13,778	13,618
Nuclear decommissioning trust funds	11,511	10,143
Operating lease right-of-use assets, net	1,146	1,092
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Investment tax credits	866	864
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Total Liabilities and Equity	183,566	176,893
Duke Energy Progress
Current Assets
Cash and cash equivalents	46	18
Receivables (net of allowance for doubtful accounts)	178	139
Receivables of VIEs (net of allowance for doubtful accounts)	822	833
Inventory	1,320	1,227
Regulatory assets	691	942
Other (includes amounts related to VIEs)	62	72
Total current assets	3,133	3,247
Property, Plant and Equipment
Cost	41,720	39,283
Accumulated depreciation and amortization	(15,947)	(15,227)
Net property, plant and equipment	25,773	24,056
Other Noncurrent Assets
Regulatory assets	4,489	4,546
Nuclear decommissioning trust funds	4,657	4,075
Operating lease right-of-use assets, net	353	318
Other	719	682
Total other noncurrent assets	10,218	9,621
Total Assets	39,124	36,924
Current Liabilities
Accounts payable	502	634
Taxes accrued	193	176
Interest accrued	86	114
Current maturities of long-term debt	983	72
Asset retirement obligations	225	244
Regulatory liabilities	295	300
Other	442	481
Total current liabilities	3,658	3,244
Long-Term Debt (includes amounts related to VIEs)	11,190	11,492
Other Noncurrent Liabilities
Deferred income taxes	2,552	2,560
Asset retirement obligations	4,293	3,626
Regulatory liabilities	4,778	4,375
Operating lease liabilities	337	293
Accrued pension and other post-retirement benefit costs	138	146
Investment tax credits	130	129
Other	271	102
Total other noncurrent liabilities	12,499	11,231
Commitments and Contingencies
Equity
Total equity	11,627	10,807
Total Liabilities and Equity	39,124	36,924
Duke Energy Progress | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	14	16
Current Liabilities
Accounts payable	322	332
Notes payable to affiliated companies	610	891
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, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Regulatory assets	2,300	3,648
Current Assets: Other	447	431
Regulatory assets	13,778	13,618
Current maturities of long-term debt	3,597	2,800
Long-Term Debt	76,524	72,452
Other	1,731	1,393
Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	91	150
Regulatory assets	119	110
Current Assets: Other	76	90
Regulatory assets	1,716	1,642
Current maturities of long-term debt	1,012	428
Long-Term Debt	1,842	3,000
Other	33	35
Duke Energy Progress
Allowance for doubtful accounts - receivables	10	8
Regulatory assets	691	942
Current Assets: Other	62	72
Regulatory assets	4,489	4,546
Current maturities of long-term debt	983	72
Long-Term Debt	11,190	11,492
Other	271	102
Duke Energy Progress | Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	38	36
Regulatory assets	47	39
Current Assets: Other	27	31
Regulatory assets	774	643
Current maturities of long-term debt	443	34
Long-Term Debt	809	1,079
Other	$ 13	$ 12

Condensed Consolidated State_14

Condensed Consolidated Statements of Cash Flows - Duke Energy Progress - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Impairment of assets and other charges	39	96
Deferred income taxes	369	(29)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
Provision for rate refunds	(28)	(59)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Purchases of debt and equity securities	(3,380)	(2,811)
Proceeds from sales and maturities of debt and equity securities	3,450	2,848
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	820	677
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,144	1,077
Equity component of AFUDC	(44)	(38)
Impairment of assets and other charges	6	31
Deferred income taxes	(32)	(12)
Contributions to qualified pension plans	(14)	(13)
Payments for asset retirement obligations	(153)	(166)
Provision for rate refunds	(1)	(24)
(Increase) decrease in
Receivables	(15)	5
Receivables from affiliated companies	2	(7)
Inventory	(93)	(135)
Other current assets	288	(189)
Increase (decrease) in
Accounts payable	(74)	(38)
Accounts payable to affiliated companies	(10)	(256)
Taxes accrued	17	178
Other current liabilities	14	(25)
Other assets	(101)	175
Other liabilities	118	23
Net cash provided by operating activities	1,872	1,263
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,036)	(1,756)
Purchases of debt and equity securities	(1,452)	(973)
Proceeds from sales and maturities of debt and equity securities	1,451	969
Other	(130)	(114)
Net cash used in investing activities	(2,167)	(1,874)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	670	991
Payments for the redemption of long-term debt	(67)	(364)
Notes payable to affiliated companies	(281)	452
Distributions to parent	0	(500)
Other	0	(1)
Net cash provided by financing activities	322	578
Net increase (decrease) in cash, cash equivalents and restricted cash	27	(33)
Cash, cash equivalents and restricted cash at beginning of period	51	79
Cash, cash equivalents and restricted cash at end of period	78	46
Significant non-cash transactions:
Accrued capital expenditures	$ 256	$ 206

Condensed Consolidated State_15

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, 2022			$ 10,309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,836	$ 677	677
Distributions to parent	(2,346)		(500)
Ending balance at Sep. 30, 2023			10,486
Beginning balance at Jun. 30, 2023			10,618
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252	368	368
Distributions to parent	(793)		(500)
Ending balance at Sep. 30, 2023			10,486
Beginning balance at Dec. 31, 2023		10,807	10,807
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,319	820	820
Distributions to parent	(2,392)
Ending balance at Sep. 30, 2024		11,627	11,627
Beginning balance at Jun. 30, 2024			11,302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,281	325	325
Distributions to parent	$ (806)
Ending balance at Sep. 30, 2024		$ 11,627	$ 11,627

Condensed Consolidated State_16

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Florida - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues		$ 8,154	$ 7,994	$ 22,997	$ 21,848
Operating Expenses
Operation, maintenance and other		1,409	1,428	4,108	4,113
Depreciation and amortization		1,516	1,353	4,312	3,913
Property and other taxes		383	394	1,162	1,136
Impairment of assets and other charges		(5)	88	39	96
Total operating expenses		6,017	5,891	17,208	16,679
Gain (Loss) on Sales of Other Assets and Other, net		7	8	25	46
Operating Income		2,144	2,111	5,814	5,215
Other Income and Expenses, net		181	178	555	516
Interest Expense		872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes		1,453	1,515	3,856	3,510
Income Tax Expense		163	42	481	316
Net Income Attributable to Duke Energy Corporation		1,281	1,252	3,319	1,836
Unrealized gains on available-for-sale securities	[1]	7	(6)	4	(2)
Other Comprehensive (Loss) Income, net of tax	[1]	(54)	232	54	261
Comprehensive Income		1,261	1,553	3,441	2,139
Duke Energy Florida
Operating Revenues		1,940	2,164	5,092	5,456
Operating Expenses
Cost of sales		705	885	1,833	2,218
Operation, maintenance and other		272	361	779	898
Depreciation and amortization		286	239	796	674
Property and other taxes		127	157	350	403
Impairment of assets and other charges		0	0	0	(1)
Total operating expenses		1,390	1,642	3,758	4,192
Gain (Loss) on Sales of Other Assets and Other, net		1	0	2	1
Operating Income		551	522	1,336	1,265
Other Income and Expenses, net		21	19	67	56
Interest Expense		114	103	339	305
Income From Continuing Operations Before Income Taxes		458	438	1,064	1,016
Income Tax Expense		94	91	212	206
Net Income Attributable to Duke Energy Corporation		364	347	852	810
Unrealized gains on available-for-sale securities		0	0	0	2
Other Comprehensive (Loss) Income, net of tax		0	0	0	2
Comprehensive Income		$ 364	$ 347	$ 852	$ 812
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.

Condensed Consolidated Balanc_9

Condensed Consolidated Balance Sheets - Duke Energy Florida - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Receivables of VIEs (net of allowance for doubtful accounts)	1,971	3,019
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Regulatory assets	13,778	13,618
Nuclear decommissioning trust funds	11,511	10,143
Operating lease right-of-use assets, net	1,146	1,092
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Investment tax credits	866	864
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Accumulated other comprehensive income (loss)	47	(6)
Total Liabilities and Equity	183,566	176,893
Duke Energy Florida
Current Assets
Cash and cash equivalents	16	24
Receivables (net of allowance for doubtful accounts)	760	83
Receivables of VIEs (net of allowance for doubtful accounts)	0	532
Inventory	686	674
Regulatory assets	261	720
Other (includes amounts related to VIEs)	40	51
Total current assets	1,765	2,322
Property, Plant and Equipment
Cost	29,924	28,353
Accumulated depreciation and amortization	(7,496)	(7,067)
Net property, plant and equipment	22,428	21,286
Other Noncurrent Assets
Regulatory assets	2,071	1,883
Nuclear decommissioning trust funds	349	382
Operating lease right-of-use assets, net	290	299
Other	497	429
Total other noncurrent assets	3,207	2,993
Total Assets	27,400	26,601
Current Liabilities
Accounts payable	882	738
Taxes accrued	238	185
Interest accrued	127	86
Current maturities of long-term debt	436	589
Asset retirement obligations	2	1
Regulatory liabilities	82	118
Other	330	350
Total current liabilities	2,419	2,354
Long-Term Debt (includes amounts related to VIEs)	9,812	9,812
Other Noncurrent Liabilities
Deferred income taxes	2,765	2,733
Asset retirement obligations	203	274
Regulatory liabilities	700	708
Operating lease liabilities	234	251
Accrued pension and other post-retirement benefit costs	92	98
Investment tax credits	242	242
Other	161	86
Total other noncurrent liabilities	4,397	4,392
Commitments and Contingencies
Equity
Member's equity	10,777	10,048
Accumulated other comprehensive income (loss)	(5)	(5)
Total equity	10,772	10,043
Total Liabilities and Equity	27,400	26,601
Duke Energy Florida | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	2	238
Current Liabilities
Accounts payable	127	135
Notes payable to affiliated companies	$ 195	$ 152

Condensed Consolidated Balan_10

Condensed Consolidated Balance Sheets - Duke Energy Florida (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Current Assets: Other	447	431
Inventory	4,338	4,292
Regulatory assets	13,778	13,618
Current maturities of long-term debt	3,597	2,800
Long-Term Debt	76,524	72,452
Regulatory assets	2,300	3,648
Accounts payable	3,953	4,228
Other	1,731	1,393
Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	91	150
Current Assets: Other	76	90
Inventory	477	462
Regulatory assets	1,716	1,642
Current maturities of long-term debt	1,012	428
Long-Term Debt	1,842	3,000
Regulatory assets	119	110
Accounts payable	212	188
Other	33	35
Duke Energy Florida
Allowance for doubtful accounts - receivables	31	11
Current Assets: Other	40	51
Inventory	686	674
Regulatory assets	2,071	1,883
Current maturities of long-term debt	436	589
Long-Term Debt	9,812	9,812
Regulatory assets	261	720
Accounts payable	882	738
Other	161	86
Duke Energy Florida | Variable Interest Entity
Allowance for doubtful accounts of VIEs - receivables	0	20
Current Assets: Other	19	37
Inventory	477	462
Regulatory assets	754	803
Current maturities of long-term debt	59	384
Long-Term Debt	772	831
Regulatory assets	60	59
Accounts payable	199	188
Other	$ 0	$ 6

Condensed Consolidated State_17

Condensed Consolidated Statements of Cash Flows - Duke Energy Florida - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Losses on sales of other assets	25	46
Impairment of assets and other charges	39	96
Deferred income taxes	369	(29)
Equity in earnings of unconsolidated affiliates	(53)	(70)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Purchases of debt and equity securities	(3,380)	(2,811)
Proceeds from sales and maturities of debt and equity securities	3,450	2,848
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	852	810
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	936	943
Equity component of AFUDC	(11)	(10)
Impairment of assets and other charges	0	(1)
Deferred income taxes	13	(42)
Equity in earnings of unconsolidated affiliates	0	1
Contributions to qualified pension plans	(9)	(9)
Payments for asset retirement obligations	(68)	(46)
(Increase) decrease in
Receivables	(171)	(203)
Receivables from affiliated companies	236	(1)
Inventory	(2)	(89)
Other current assets	541	516
Increase (decrease) in
Accounts payable	266	(140)
Accounts payable to affiliated companies	(8)	(23)
Taxes accrued	56	289
Other current liabilities	(3)	23
Other assets	(391)	12
Other liabilities	27	(14)
Net cash provided by operating activities	2,264	2,016
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,855)	(1,851)
Purchases of debt and equity securities	(109)	(135)
Proceeds from sales and maturities of debt and equity securities	193	182
Other	(222)	(125)
Net cash used in investing activities	(1,993)	(1,929)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	179	281
Payments for the redemption of long-term debt	(393)	(76)
Notes payable to affiliated companies	43	(313)
Distributions to parent	(125)	0
Other	(1)	(1)
Net cash provided by financing activities	(297)	(109)
Net increase (decrease) in cash, cash equivalents and restricted cash	(26)	(22)
Cash, cash equivalents and restricted cash at beginning of period	67	86
Cash, cash equivalents and restricted cash at end of period	41	64
Significant non-cash transactions:
Accrued capital expenditures	$ 372	$ 352

Condensed Consolidated State_18

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, 2022			$ 9,023	$ 9,031	$ (8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,836		810	810
Other	(1)		1	1
Distributions to parent	(2,346)
Other comprehensive income (loss)	(2)	[1]	2		2
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	2		1	1
Distributions to parent	(793)
Other comprehensive income (loss)	(6)	[1]	0
Ending balance at Sep. 30, 2023			9,836	9,842	(6)
Beginning balance at Dec. 31, 2023			10,043	10,048	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,319		852	852
Other	(2)		2	2
Distributions to parent	(2,392)		(125)	(125)
Other comprehensive income (loss)	4	[1]	0
Ending balance at Sep. 30, 2024			10,772	10,777	(5)
Beginning balance at Jun. 30, 2024			10,550	10,555	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,281		364	364
Other	(3)		(17)	(17)
Distributions to parent	(806)		(125)	(125)
Other comprehensive income (loss)	$ 7	[1]	0
Ending balance at Sep. 30, 2024			$ 10,772	$ 10,777	$ (5)
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.

Condensed Consolidated State_19

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Ohio - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Regulated electric	$ 7,775	$ 7,640	$ 21,253	$ 20,140
Regulated natural gas	298	284	1,511	1,497
Total operating revenues	8,154	7,994	22,997	21,848
Operating Expenses
Operation, maintenance and other	1,409	1,428	4,108	4,113
Depreciation and amortization	1,516	1,353	4,312	3,913
Property and other taxes	383	394	1,162	1,136
Total operating expenses	6,017	5,891	17,208	16,679
Operating Income	2,144	2,111	5,814	5,215
Other Income and Expenses, net	181	178	555	516
Interest Expense	872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes	1,453	1,515	3,856	3,510
Income Tax Expense From Continuing Operations	163	42	481	316
Net Income Attributable to Duke Energy Corporation	1,281	1,252	3,319	1,836
Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales	2,644	2,571	7,207	6,987
Cost of natural gas
Operating Expenses
Cost of sales	70	57	380	434
Duke Energy Ohio
Regulated electric	497	472	1,431	1,411
Regulated natural gas	108	105	460	464
Total operating revenues	605	577	1,891	1,875
Operating Expenses
Operation, maintenance and other	131	114	378	358
Depreciation and amortization	102	90	297	266
Property and other taxes	99	94	303	258
Total operating expenses	496	449	1,494	1,485
Operating Income	109	128	397	390
Other Income and Expenses, net	2	12	12	33
Interest Expense	52	46	144	125
Income From Continuing Operations Before Income Taxes	59	94	265	298
Income Tax Expense From Continuing Operations	7	14	42	47
Net Income Attributable to Duke Energy Corporation	52	80	223	251
Duke Energy Ohio | Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales	146	145	416	485
Duke Energy Ohio | Cost of natural gas
Operating Expenses
Cost of sales	$ 18	$ 6	$ 100	$ 118

Condensed Consolidated Balan_11

Condensed Consolidated Balance Sheets - Duke Energy Ohio - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,778	13,618
Operating lease right-of-use assets, net	1,146	1,092
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	45,060	44,920
Retained earnings	3,052	2,235
Total Duke Energy Corporation stockholders' equity	49,133	49,112
Total Liabilities and Equity	183,566	176,893
Duke Energy Ohio
Current Assets
Cash and cash equivalents	8	24
Notes receivable from affiliated companies	33	0
Inventory	173	179
Regulatory assets	98	73
Other (includes amounts related to VIEs)	43	134
Total current assets	767	761
Property, Plant and Equipment
Cost	13,784	13,210
Accumulated depreciation and amortization	(3,640)	(3,451)
Net property, plant and equipment	10,144	9,759
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets	678	676
Operating lease right-of-use assets, net	8	16
Other	94	84
Total other noncurrent assets	1,700	1,696
Total Assets	12,611	12,216
Current Liabilities
Taxes accrued	247	316
Interest accrued	55	35
Current maturities of long-term debt	150	0
Asset retirement obligations	7	6
Regulatory liabilities	59	56
Other	68	65
Total current liabilities	1,131	1,500
Long-Term Debt (includes amounts related to VIEs)	3,989	3,493
Other Noncurrent Liabilities
Deferred income taxes	1,324	1,272
Asset retirement obligations	130	130
Regulatory liabilities	475	497
Operating lease liabilities	8	16
Accrued pension and other post-retirement benefit costs	93	97
Other	94	86
Total other noncurrent liabilities	2,124	2,098
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	3,119	3,100
Retained earnings	1,461	1,238
Total Duke Energy Corporation stockholders' equity	5,342	5,100
Total Liabilities and Equity	12,611	12,216
Duke Energy Ohio | Nonrelated Party
Current Assets
Receivables (net of allowance for doubtful accounts)	401	112
Current Liabilities
Accounts payable	285	338
Duke Energy Ohio | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	11	239
Current Liabilities
Accounts payable	62	71
Notes payable to affiliated companies	198	613
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, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
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)	772,000,000	771,000,000
Duke Energy Ohio
Allowance for doubtful accounts - receivables	$ 41	$ 9
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_20

Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Deferred income taxes	369	(29)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	223	251
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	300	269
Equity component of AFUDC	(4)	(7)
Deferred income taxes	30	7
Contributions to qualified pension plans	(5)	(5)
Payments for asset retirement obligations	(5)	(9)
(Increase) decrease in
Receivables	47	(23)
Receivables from affiliated companies	57	103
Inventory	6	(24)
Other current assets	57	103
Increase (decrease) in
Accounts payable	(32)	(69)
Accounts payable to affiliated companies	(9)	(1)
Taxes accrued	(69)	(70)
Other current liabilities	26	(29)
Other assets	44	(39)
Other liabilities	(43)	(8)
Net cash provided by operating activities	623	449
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(640)	(676)
Losses on sales of other assets	0	75
Notes receivable from affiliated companies	(199)	(11)
Other	(29)	(53)
Net cash used in investing activities	(868)	(665)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	645	749
Payments for the redemption of long-term debt	0	(300)
Notes payable to affiliated companies	(415)	(224)
Other	(1)	(5)
Net cash provided by financing activities	229	220
Net increase (decrease) in cash, cash equivalents and restricted cash	(16)	4
Cash, cash equivalents and restricted cash at beginning of period	24	16
Cash, cash equivalents and restricted cash at end of period	8	20
Significant non-cash transactions:
Accrued capital expenditures	$ 94	$ 134

Condensed Consolidated State_21

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, 2022		$ 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		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)
Ending Balance (Attributable to Parent) at Sep. 30, 2023		1	44,886	2,036	5,017	762	3,100	1,155
Beginning Balance (Attributable to Parent) at Dec. 31, 2023	49,112	1	44,920	2,235	5,100	762	3,100	1,238
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,319				223			223
Other	(2)		1	(2)	19		19
Ending Balance (Attributable to Parent) at Sep. 30, 2024	49,133	1	45,060	3,052	5,342	762	3,119	1,461
Beginning Balance (Attributable to Parent) at Jun. 30, 2024		1	45,007	2,635	5,290	762	3,119	1,409
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,281				52			52
Other	(3)			(3)
Ending Balance (Attributable to Parent) at Sep. 30, 2024	$ 49,133	$ 1	$ 45,060	$ 3,052	$ 5,342	$ 762	$ 3,119	$ 1,461

Condensed Consolidated State_22

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Indiana - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues		$ 8,154	$ 7,994	$ 22,997	$ 21,848
Operating Expenses
Operation, maintenance and other		1,409	1,428	4,108	4,113
Depreciation and amortization		1,516	1,353	4,312	3,913
Property and other taxes		383	394	1,162	1,136
Total operating expenses		6,017	5,891	17,208	16,679
Operating Income		2,144	2,111	5,814	5,215
Other Income and Expenses, net		181	178	555	516
Interest Expense		872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes		1,453	1,515	3,856	3,510
Income Tax Expense From Continuing Operations		163	42	481	316
Net Income Attributable to Duke Energy Corporation		1,281	1,252	3,319	1,836
Other comprehensive income (loss)	[1]	(54)	232	54	261
Comprehensive Income		1,261	1,553	3,441	2,139
Duke Energy Indiana
Operating Revenues		836	851	2,342	2,606
Operating Expenses
Cost of sales		267	283	761	980
Operation, maintenance and other		169	160	510	524
Depreciation and amortization		166	173	507	500
Property and other taxes		7	17	37	42
Total operating expenses		609	633	1,815	2,046
Operating Income		227	218	527	560
Other Income and Expenses, net		16	30	44	58
Interest Expense		58	53	173	157
Income From Continuing Operations Before Income Taxes		185	195	398	461
Income Tax Expense From Continuing Operations		29	36	65	82
Net Income Attributable to Duke Energy Corporation		156	159	333	379
Other comprehensive income (loss)		0	0	(1)	0
Comprehensive Income		$ 156	$ 159	$ 332	$ 379
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.

Condensed Consolidated Balan_13

Condensed Consolidated Balance Sheets - Duke Energy Indiana - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Regulatory assets	13,778	13,618
Operating lease right-of-use assets, net	1,146	1,092
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Asset retirement obligations	639	596
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Investment tax credits	866	864
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Accumulated other comprehensive income (loss)	47	(6)
Total Liabilities and Equity	183,566	176,893
Duke Energy Indiana
Current Assets
Cash and cash equivalents	8	8
Inventory	580	582
Regulatory assets	105	102
Other	77	98
Total current assets	1,191	1,143
Property, Plant and Equipment
Cost	19,897	18,900
Accumulated depreciation and amortization	(6,837)	(6,501)
Net property, plant and equipment	13,060	12,399
Other Noncurrent Assets
Regulatory assets	1,013	894
Operating lease right-of-use assets, net	42	50
Other	384	325
Total other noncurrent assets	1,439	1,269
Total Assets	15,690	14,811
Current Liabilities
Taxes accrued	61	66
Interest accrued	74	54
Current maturities of long-term debt	4	4
Asset retirement obligations	152	120
Regulatory liabilities	165	209
Other	198	184
Total current liabilities	987	1,369
Long-Term Debt (includes amounts related to VIEs)	4,647	4,348
Other Noncurrent Liabilities
Deferred income taxes	1,571	1,436
Asset retirement obligations	1,126	689
Regulatory liabilities	1,411	1,459
Operating lease liabilities	38	46
Accrued pension and other post-retirement benefit costs	94	115
Investment tax credits	186	186
Other	15	0
Total other noncurrent liabilities	4,441	3,931
Commitments and Contingencies
Equity
Member's equity	5,465	5,012
Accumulated other comprehensive income (loss)	0	1
Total equity	5,465	5,013
Total Liabilities and Equity	15,690	14,811
Duke Energy Indiana | Nonrelated Party
Current Assets
Receivables (net of allowance for doubtful accounts)	416	156
Current Liabilities
Accounts payable	261	300
Duke Energy Indiana | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	5	197
Current Liabilities
Accounts payable	61	176
Notes payable to affiliated companies	11	256
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, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Duke Energy Indiana
Allowance for doubtful accounts - receivables	$ 16	$ 5

Condensed Consolidated State_23

Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Deferred income taxes	369	(29)
Contributions to qualified pension plans	(100)	(100)
Payments for asset retirement obligations	(417)	(423)
Provision for rate refunds	(28)	(59)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Purchases of debt and equity securities	(3,380)	(2,811)
Proceeds from sales and maturities of debt and equity securities	3,450	2,848
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Other	(84)	(95)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	333	379
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	510	503
Equity component of AFUDC	(13)	(7)
Deferred income taxes	87	15
Contributions to qualified pension plans	(8)	(8)
Payments for asset retirement obligations	(60)	(57)
Provision for rate refunds	(20)	0
(Increase) decrease in
Receivables	36	(23)
Receivables from affiliated companies	1	(12)
Inventory	2	(112)
Other current assets	36	209
Increase (decrease) in
Accounts payable	(29)	(86)
Accounts payable to affiliated companies	(74)	(32)
Taxes accrued	(5)	(4)
Other current liabilities	12	107
Other assets	(83)	(62)
Other liabilities	3	26
Net cash provided by operating activities	728	836
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(711)	(699)
Purchases of debt and equity securities	(31)	(53)
Proceeds from sales and maturities of debt and equity securities	22	42
Notes receivable from affiliated companies	(117)	156
Other	(24)	(50)
Net cash used in investing activities	(861)	(604)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	298	495
Payments for the redemption of long-term debt	0	(300)
Notes payable to affiliated companies	(245)	(234)
Capital contribution from parent	235	0
Distributions to parent	(154)	(209)
Other	(1)	(1)
Net cash provided by financing activities	133	(249)
Net increase (decrease) in cash, cash equivalents and restricted cash	0	(17)
Cash, cash equivalents and restricted cash at beginning of period	8	31
Cash, cash equivalents and restricted cash at end of period	8	14
Significant non-cash transactions:
Accrued capital expenditures	$ 104	$ 94

Condensed Consolidated State_24

Condensed Consolidated Statements of Changes in Equity - Duke Energy Indiana - USD ($) $ in Millions	Total	Pension and OPEB Adjustments	Duke Energy Indiana	Duke Energy Indiana Member's Equity	Duke Energy Indiana Pension and OPEB Adjustments
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
Distributions to parent	(2,346)		(146)	(146)
Other	(1)
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
Distributions to parent	(793)		(50)	(50)
Other	2
Ending balance at Sep. 30, 2023			4,936	4,935	1
Beginning balance at Dec. 31, 2023			5,013	5,012	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,319		333	333
Contribution from parent			235	235
Distributions to parent	(2,392)		(113)	(113)
Other	(2)	$ (1)	(3)	(2)	$ (1)
Ending balance at Sep. 30, 2024			5,465	5,465
Beginning balance at Jun. 30, 2024			5,401	5,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,281		156	156
Distributions to parent	(806)		(93)	(93)
Other	$ (3)	$ (1)	1	1
Ending balance at Sep. 30, 2024			$ 5,465	$ 5,465

Condensed Consolidated State_25

Condensed Consolidated Statements of Operations and Comprehensive Income - Piedmont - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues	$ 8,154	$ 7,994	$ 22,997	$ 21,848
Operating Expenses
Operation, maintenance and other	1,409	1,428	4,108	4,113
Depreciation and amortization	1,516	1,353	4,312	3,913
Property and other taxes	383	394	1,162	1,136
Impairment of assets and other charges	(5)	88	39	96
Total operating expenses	6,017	5,891	17,208	16,679
Operating Income	2,144	2,111	5,814	5,215
Other Income and Expenses, net	181	178	555	516
Interest Expense	872	774	2,513	2,221
Income From Continuing Operations Before Income Taxes	1,453	1,515	3,856	3,510
Income Tax Expense From Continuing Operations	163	42	481	316
Net Income Attributable to Duke Energy Corporation	1,281	1,252	3,319	1,836
Comprehensive Income Attributable to Duke Energy	1,227	1,484	3,373	2,097
Piedmont
Operating Revenues	219	208	1,139	1,119
Operating Expenses
Cost of natural gas	52	51	280	316
Operation, maintenance and other	87	77	267	248
Depreciation and amortization	65	59	191	175
Property and other taxes	16	16	47	46
Impairment of assets and other charges	0	0	0	(4)
Total operating expenses	220	203	785	781
Operating Income	(1)	5	354	338
Other Income and Expenses, net	14	17	48	49
Interest Expense	47	41	135	120
Income From Continuing Operations Before Income Taxes	(34)	(19)	267	267
Income Tax Expense From Continuing Operations	(10)	(5)	49	46
Net Income Attributable to Duke Energy Corporation	(24)	(14)	218	221
Comprehensive Income Attributable to Duke Energy	$ (24)	$ (14)	$ 218	$ 221

Condensed Consolidated Balan_15

Condensed Consolidated Balance Sheets - Piedmont - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets
Cash and cash equivalents	$ 376	$ 253
Receivables (net of allowance for doubtful accounts)	2,161	1,112
Inventory	4,338	4,292
Regulatory assets	2,300	3,648
Other (includes amounts related to VIEs)	447	431
Total current assets	12,142	12,769
Property, Plant and Equipment
Cost	179,542	171,353
Accumulated depreciation and amortization	(58,146)	(56,038)
Net property, plant and equipment	121,396	115,315
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets	13,778	13,618
Operating lease right-of-use assets, net	1,146	1,092
Investments in equity method unconsolidated affiliates	477	492
Other	3,732	3,964
Total other noncurrent assets	50,028	48,809
Total Assets	183,566	176,893
Current Liabilities
Accounts payable	3,953	4,228
Taxes accrued	1,016	816
Interest accrued	809	745
Current maturities of long-term debt	3,597	2,800
Regulatory liabilities	1,267	1,369
Other	2,122	2,319
Total current liabilities	17,427	17,283
Long-Term Debt (includes amounts related to VIEs)	76,524	72,452
Other Noncurrent Liabilities
Deferred income taxes	10,859	10,556
Asset retirement obligations	9,511	8,560
Regulatory liabilities	14,926	14,039
Operating lease liabilities	956	917
Accrued pension and other post-retirement benefit costs	432	485
Other	1,731	1,393
Total other noncurrent liabilities	39,366	36,971
Commitments and Contingencies
Equity
Common stock	1	1
Retained earnings	3,052	2,235
Total Duke Energy Corporation stockholders' equity	49,133	49,112
Noncontrolling interests	1,116	1,075
Total equity	50,249	50,187
Total Liabilities and Equity	183,566	176,893
Piedmont
Current Assets
Cash and cash equivalents	4	0
Inventory	58	112
Regulatory assets	154	161
Other (includes amounts related to VIEs)	80	7
Total current assets	434	601
Property, Plant and Equipment
Cost	12,619	11,908
Accumulated depreciation and amortization	(2,398)	(2,259)
Net property, plant and equipment	10,221	9,649
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets	427	410
Operating lease right-of-use assets, net	4	4
Investments in equity method unconsolidated affiliates	78	78
Other	284	276
Total other noncurrent assets	842	817
Total Assets	11,497	11,067
Current Liabilities
Accounts payable	196	315
Taxes accrued	53	89
Interest accrued	50	39
Current maturities of long-term debt	150	40
Regulatory liabilities	91	98
Other	75	77
Total current liabilities	1,192	1,250
Long-Term Debt (includes amounts related to VIEs)	3,853	3,628
Other Noncurrent Liabilities
Deferred income taxes	1,007	933
Asset retirement obligations	27	26
Regulatory liabilities	958	988
Operating lease liabilities	8	10
Accrued pension and other post-retirement benefit costs	6	8
Other	176	172
Total other noncurrent liabilities	2,182	2,137
Commitments and Contingencies
Equity
Common stock	1,635	1,635
Retained earnings	2,634	2,416
Total Duke Energy Corporation stockholders' equity	4,269	4,051
Noncontrolling interests	1	1
Total equity	4,270	4,052
Total Liabilities and Equity	11,497	11,067
Piedmont | Nonrelated Party
Current Assets
Receivables (net of allowance for doubtful accounts)	126	311
Piedmont | Affiliated Entity
Current Assets
Receivables (net of allowance for doubtful accounts)	12	10
Current Liabilities
Accounts payable	64	54
Notes payable to affiliated companies	$ 513	$ 538

Condensed Consolidated Balan_16

Condensed Consolidated Balance Sheets - Piedmont (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 127	$ 55
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	772,000,000	771,000,000
Piedmont
Allowance for doubtful accounts - receivables	$ 12	$ 11
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100

Condensed Consolidated State_26

Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,387	$ 1,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,792	4,538
Equity component of AFUDC	(173)	(146)
Impairment of assets and other charges	39	96
Deferred income taxes	369	(29)
Equity in earnings of unconsolidated affiliates	(53)	(70)
Contributions to qualified pension plans	(100)	(100)
(Increase) decrease in
Receivables	(22)	481
Inventory	(36)	(531)
Other current assets	742	40
Increase (decrease) in
Accounts payable	90	(972)
Taxes accrued	202	277
Other current liabilities	(248)	(116)
Other assets	154	491
Other liabilities	221	368
Net cash provided by operating activities	8,951	7,309
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,191)	(9,310)
Other	(723)	(578)
Net cash used in investing activities	(9,851)	(9,751)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,760	8,704
Payments for the redemption of long-term debt	(2,833)	(3,097)
Net cash provided by financing activities	990	2,413
Net increase (decrease) in cash, cash equivalents and restricted cash	90	(29)
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	447	574
Significant non-cash transactions:
Accrued capital expenditures	1,604	1,528
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	218	221
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	193	177
Equity component of AFUDC	(17)	(15)
Impairment of assets and other charges	0	(4)
Deferred income taxes	54	52
Equity in earnings of unconsolidated affiliates	(6)	(6)
Contributions to qualified pension plans	(3)	(3)
(Increase) decrease in
Receivables	185	335
Receivables from affiliated companies	(2)	(1)
Inventory	54	83
Other current assets	(71)	(63)
Increase (decrease) in
Accounts payable	(39)	(78)
Accounts payable to affiliated companies	10	(3)
Taxes accrued	(36)	(30)
Other current liabilities	8	25
Other assets	(15)	(23)
Other liabilities	8	7
Net cash provided by operating activities	541	674
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(800)	(774)
Other	(44)	(32)
Net cash used in investing activities	(844)	(806)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	373	348
Payments for the redemption of long-term debt	(40)	0
Notes payable to affiliated companies	(26)	(216)
Net cash provided by financing activities	307	132
Net increase (decrease) in cash, cash equivalents and restricted cash	4	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	4	0
Significant non-cash transactions:
Accrued capital expenditures	$ 143	$ 149

Condensed Consolidated State_27

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, 2022		$ 1	$ 2,637	$ 49,322			$ 1,635	$ 2,037	$ 3,672
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022					$ 2,531					$ 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		1	2,036	49,006			1,635	2,258	3,893
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023					2,820					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		1	2,036	49,006			1,635	2,258	3,893
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2023					2,820					1
Ending Balance (Parent) at Sep. 30, 2023	51,826					3,894
Beginning Balance (Attributable to Parent) at Dec. 31, 2023	49,112	1	2,235	49,112		4,051	1,635	2,416	4,051
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2023	1,075				1,075	1				1
Beginning Balance (Parent) at Dec. 31, 2023	50,187					4,052
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,387					218		218	218
Ending Balance (Attributable to Parent) at Sep. 30, 2024	49,133	1	3,052	49,133		4,269	1,635	2,634	4,269
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2024	1,116				1,116	1				1
Ending Balance (Parent) at Sep. 30, 2024	50,249					4,270
Beginning Balance (Attributable to Parent) at Jun. 30, 2024		1	2,635	49,707			1,635	2,658	4,293
Beginning Balance (Attributable to Noncontrolling Interest) at Jun. 30, 2024					1,099					1
Beginning Balance (Parent) at Jun. 30, 2024	50,806					4,294
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,315					(24)		(24)	(24)
Ending Balance (Attributable to Parent) at Sep. 30, 2024	49,133	$ 1	$ 3,052	$ 49,133		4,269	$ 1,635	$ 2,634	$ 4,269
Ending Balance (Attributable to Noncontrolling Interest) at Sep. 30, 2024	1,116				$ 1,116	1				$ 1
Ending Balance (Parent) at Sep. 30, 2024	$ 50,249					$ 4,270

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Sep. 30, 2024
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 Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2023. 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, 2024, and 2023, the Income (Loss) 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, 2024 December 31, 2023 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 376 $ 13 $ 82 $ 46 $ 16 $ 253 $ 9 $ 59 $ 18 $ 24 Other 51 6 45 27 18 76 9 67 31 36 Other Noncurrent Assets Other 18 1 11 5 7 16 1 9 2 7 Total cash, cash equivalents and restricted cash $ 445 $ 20 $ 138 $ 78 $ 41 $ 345 $ 19 $ 135 $ 51 $ 67 INVENTORY Provisions for inventory write-offs were not material at September 30, 2024, and December 31, 2023. The components of inventory are presented in the tables below. September 30, 2024 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 $ 3,229 $ 1,076 $ 1,580 $ 1,052 $ 528 $ 141 $ 381 $ 12 Coal 810 360 232 161 71 21 197 — Natural gas, oil and other fuel 299 46 194 107 87 11 2 46 Total inventory $ 4,338 $ 1,482 $ 2,006 $ 1,320 $ 686 $ 173 $ 580 $ 58 December 31, 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 $ 3,086 $ 1,075 $ 1,465 $ 963 $ 502 $ 139 $ 361 $ 12 Coal 842 364 231 154 77 28 219 — Natural gas, oil and other fuel 364 45 205 110 95 12 2 100 Total inventory $ 4,292 $ 1,484 $ 1,901 $ 1,227 $ 674 $ 179 $ 582 $ 112 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 on the Consolidated Balance Sheets as of September 30, 2024, and December 31, 2023. The asset is recorded in the EU&I segment at historical cost and is subject to impairment testing should circumstances indicate the carrying value may not be recoverable. ACCOUNTS PAYABLE Duke Energy has a voluntary supply chain finance program (the “program”) that allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to a global financial institution at a rate that leverages Duke Energy’s credit rating and which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program determine at their sole discretion, which invoices they will sell to the financial institution. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms, which are based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program. The following table represents the changes in confirmed obligations outstanding for the nine months ended September 30, 2024, and 2023. Three Months Ended September 30, 2023 and 2024 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 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 Confirmed obligations outstanding at June 30, 2024 $ 28 $ — $ — $ — $ — $ — $ — $ 28 Invoices confirmed during the period 26 — 1 — 1 — — 25 Confirmed invoices paid during the period (28) — — — — — — (28) Confirmed obligations outstanding at September 30, 2024 $ 26 $ — $ 1 $ — $ 1 $ — $ — $ 25 Nine Months Ended September 30, 2023 and 2024 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 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 Confirmed obligations outstanding at December 31, 2023 $ 50 $ — $ 3 $ — $ 3 $ — $ — $ 47 Invoices confirmed during the period 146 — 2 — 2 — — 144 Confirmed invoices paid during the period (170) — (4) — (4) — — (166) Confirmed obligations outstanding at September 30, 2024 $ 26 $ — $ 1 $ — $ 1 $ — $ — $ 25 NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2024.

Dispositions

Dispositions	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	DISPOSITIONS Sale of Commercial Renewables Segment In 2023, Duke Energy completed the sale of substantially all the assets in the Commercial Renewables business segment. Duke Energy closed on the transaction with Brookfield on October 25, 2023, for proceeds of $1.1 billion, with approximately half of the proceeds received at closing and the remainder due 18 months after closing. The balance of the remaining proceeds to be received of $545 million is included in Receivable from sales of Commercial Renewables Disposal Groups, as of September 30, 2024, and $531 million is included in Other, within Other Noncurrent Assets, as of December 31, 2023, on Duke Energy's Consolidated Balance Sheets. The disposal process for the remaining assets is expected to be completed in 2024, with net proceeds from the dispositions not anticipated to be material. Assets Held For Sale and Discontinued Operations The Commercial Renewables Disposal Groups were classified as held for sale and as discontinued operations in the fourth quarter of 2022. No interest from corporate level debt was allocated to discontinued operations and no adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows or the Consolidated Statements of Changes in Equity. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Consolidated Balance Sheets. (in millions) September 30, 2024 December 31, 2023 Current Assets Held for Sale Other $ 4 $ 14 Total current assets held for sale 4 14 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 101 247 Accumulated depreciation and amortization (24) (57) Net property, plant and equipment 77 190 Operating lease right-of-use assets, net 4 4 Other — 3 Total other noncurrent assets held for sale 4 7 Total Assets Held for Sale $ 85 $ 211 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 19 $ 9 Taxes accrued 1 3 Current maturities of long-term debt 43 5 Unrealized losses on commodity hedges 11 68 Other 3 37 Total current liabilities associated with assets held for sale 77 122 Noncurrent Liabilities Associated with Assets Held for Sale Long-Term debt — 39 Operating lease liabilities 5 5 Asset retirement obligations 5 8 Unrealized losses on commodity hedges 61 94 Other 14 11 Total other noncurrent liabilities associated with assets held for sale 85 157 Total Liabilities Associated with Assets Held for Sale $ 162 $ 279 As of September 30, 2024, and December 31, 2023, the noncontrolling interest balance is $17 million and $66 million, respectively. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Income (Loss) 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) 2024 2023 2024 2023 Operating revenues $ 2 $ 103 $ 9 $ 293 Operation, maintenance and other 3 93 19 270 Property and other taxes — 8 1 27 Other income and expenses, net — (2) — (9) Interest expense 1 10 3 53 Loss on disposal 17 169 22 1,603 Loss before income taxes (19) (179) (36) (1,669) Income tax benefit (44) (27) (48) (353) Income (Loss) from discontinued operations $ 25 $ (152) $ 12 $ (1,316) Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations (3) (38) (3) 33 Net income (loss) from discontinued operations attributable to Duke Energy Corporation $ 22 $ (190) $ 9 $ (1,283) The Commercial Renewables Disposal Groups' assets held for sale amounts presented above reflect pretax impairments recorded against property, plant and equipment of approximately $131 million and $278 million as of September 30, 2024, and December 31, 2023, respectively. 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) 2024 2023 Cash flows provided by (used in): Operating activities $ 6 $ 545 Investing activities (13) (597) 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 all but one of the project companies in this matter transferred to affiliates of Brookfield in conjunction with the transaction closing in October 2023. In May 2024, the remaining claim in the lawsuit was transferred to the buyer in connection with the sale of a portion of the remaining Commercial Renewables assets. 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, 2024
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS Duke Energy Duke Energy's segment structure includes the following two segments: EU&I and GU&I. 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. 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 NMC. Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended September 30, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 7,833 $ 309 $ 8,142 $ 12 $ — $ 8,154 Intersegment revenues 19 23 42 30 (72) — Total revenues $ 7,852 $ 332 $ 8,184 $ 42 $ (72) $ 8,154 Segment income (loss) (a)(b) $ 1,451 $ (25) $ 1,426 $ (222) $ — $ 1,204 Add: Noncontrolling interests 34 Add: Preferred dividends 39 Add: Preferred redemption costs 16 Discontinued operations 22 Net Income $ 1,315 Segment assets $ 161,471 $ 17,852 $ 179,323 $ 4,243 $ — $ 183,566 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) (c) $ 1,447 $ 15 $ 1,462 $ (59) $ — $ 1,403 Add: Noncontrolling interests 69 Add: Preferred dividends 39 Discontinued operations (190) Net Loss $ 1,321 (a) EU&I includes $17 million recorded within Operating Revenues on the Condensed Consolidated Statements of Operations and GU&I includes $1 million recorded within Operations, maintenance and other and $3 million recorded within Other income and expenses on the Condensed Consolidated Statements of Operations related to nonrecurring customer billing adjustments as a result of implementation of a new customer system. (b) Other includes $16 million recorded as Preferred Redemption Costs on the Condensed Consolidated Statements of Operations related to the redemption of Series B Preferred Stock. Refer to Note 15 for further information. (c) 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. Nine Months Ended September 30, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 21,420 $ 1,547 $ 22,967 $ 30 $ — $ 22,997 Intersegment revenues 55 68 123 90 (213) — Total revenues $ 21,475 $ 1,615 $ 23,090 $ 120 $ (213) $ 22,997 Segment income (loss) (a)(b) $ 3,562 $ 265 $ 3,827 $ (625) $ — $ 3,202 Add: Noncontrolling interests 68 Add: Preferred dividends 92 Add: Preferred redemption costs 16 Discontinued operations 9 Net Income $ 3,387 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) (c) $ 3,088 $ 327 $ 3,415 $ (388) $ — $ 3,027 Add: Noncontrolling interests 42 Add: Preferred dividends 92 Discontinued operations (1,283) Net Income $ 1,878 (a) EU&I includes $42 million recorded within Impairment of assets and other charges, $2 million within Operations, maintenance and other, and an $11 million reduction recorded within Interest Expense on Duke Energy Carolinas' and Duke Energy Progress' Condensed Consolidated Statement of Operations, related to the Duke Energy Carolinas' South Carolina rate case order. Additionally, EU&I includes $17 million recorded within Operating Revenues on the Condensed Consolidated Statements of Operations and GU&I includes $1 million recorded within Operations, maintenance and other and $3 million recorded within Other income and expenses on the Condensed Consolidated Statements of Operations related to nonrecurring customer billing adjustments as a result of implementation of a new customer system. (b) Other includes $16 million recorded as Preferred Redemption Costs on the Condensed Consolidated Statements of Operations related to the redemption of Series B Preferred Stock. Refer to Note 15 for further information. (c) 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. 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, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 497 $ 108 $ 605 $ — $ — $ 605 Segment income (loss)/Net income $ 57 $ (4) $ 53 $ (1) $ — $ 52 Segment assets $ 8,096 $ 4,456 $ 12,552 $ 13 $ 46 $ 12,611 Three Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 472 $ 105 $ 577 $ — $ 577 Segment income (loss)/Net income $ 65 $ 17 $ 82 $ (2) $ 80 Nine Months Ended September 30, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 1,431 $ 460 $ 1,891 $ — $ 1,891 Segment income (loss)/Net income $ 181 $ 46 $ 227 $ (4) $ 223 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

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2024
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. For open regulatory matters, unless otherwise noted, the Subsidiary Registrants and Duke Energy Kentucky cannot predict the outcome or ultimate resolution of their respective matters. As discussed further below, the Subsidiary Registrants were impacted by significant storms in 2024. Each Subsidiary Registrant is responsible for the restoration of service within its respective service territory and the recovery of related storm costs, including financing costs and, as applicable, the replenishment of storm-related reserves. The Subsidiary Registrants are considering all available avenues to recover storm-related costs, including insurance recovery and the securitization for certain costs, where applicable. Total storm restoration costs across the Subsidiary Registrants, including capital expenditures, for hurricanes Helene, Debby and Milton ar e estimated to be in the range of $2.4 billion to $2.9 billion and are expected to primarily impact the following registrants: (in millions) Cost Estimate Range (a) Duke Energy Carolinas $ 950 - $ 1,150 Duke Energy Progress 350 - 450 Duke Energy Florida 1,100 - 1,300 (a) These estimates do not include amounts for rebuilding certain damaged infrastructure, as estimates of such costs are not yet available, and will change as restoration work is completed and additional information is received on actual costs incurred. Duke Energy Florida was the only jurisdiction materially impacted by Hurricane Milton. Hurricane Helene In late September 2024, Hurricane Helene made landfall in Florida as a Category 4 storm and subsequently impacted all of Duke Energy's service territories as the storm moved inland, with the most severe damage occurring in the Duke Energy Florida territory and the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 3.5 million customers were impacted across Duke Energy's system. As of September 30, 2024, Duke Energy's restoration costs incurred, including capital of $112 million, were approximately $582 million (primarily $261 million, $51 million and $251 million for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively). Approximately $451 million of the operation and maintenance expenses are deferred in regulatory assets on the Condensed Consolidated Balance Sheets as of September 30, 2024 (primarily $177 million, $34 million and $236 million for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively). Total storm restoration costs, including capital expenditures, for Duke Energy are currently estimated to be in the range of $1.5 billion to $1.9 billion (primarily $900 million to $1.1 billion for Duke Energy Carolinas, $300 million to $400 million for Duke Energy Progress and $300 million to $400 million for Duke Energy Florida). These estimates do not include amounts for rebuilding certain damaged infrastructure, as estimates of such costs are not yet available, and will change as restoration work is completed and additional information is received on actual costs incurred. Hurricane Debby In August 2024, Hurricane Debby made landfall in Florida as a Category 1 storm, impacting primarily the Duke Energy Florida territory as well as the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 700,000 customers were impacted across Duke Energy's system . As of September 30, 2024, Duke Energy's restoration costs incurred, including capital expenditures of $11 million, were approximately $150 million (primarily $45 million, $45 million and $60 million for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively). App roximately $90 million of the operation and maintenance expenses are deferred in regulatory assets on the Condensed Consolidated Balance Sheets as of September 30, 2024 (primarily $23 million, $13 million and $54 million for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively). These estimates could change as additional information is received on actual costs incurred. 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 Hearing Request 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 March 6, 2024, the NRC staff submitted the rulemaking, which included the updated GEIS, to the NRC. The NRC approved the publicatio n of the final rule o n May 16, 2024. The updated GEIS was finalized and published on August 1, 2024, and the final rule was issued on August 6, 2024. 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. On February 8, 2024, the NRC issued the Oconee site-specific draft EIS. The NRC and EPA published the notice for the public to submit comments on the ONS site-specific draft EIS. On April 29, 2024, the Petitioners filed a Hearing Request. The request proposed three contentions and claimed that the ONS site-specific draft EIS is inadequate to satisfy the requirements of NEPA and the NRC’s NEPA-implementing regulations. Duke Energy Carolinas provided responses to the proposed contentions by May 31, 2024, as ordered by the ASLB. On June 24, 2024, the ASLB convened a pre-hearing conference to obtain information and ask questions concerning the admissibility of the Petitioners' contentions. On August 29, 2024, the ASLB issued a protective order to protect Sensitive Unclassified Non-Safeguards Information (SUNSI) that is identified as Critical Energy/Electrical Infrastructure Inform ation. On October 18, 2024, the ASLB indicated that it plans to issue a decision on contention admissibility by December 18, 2024. The NRC's issuance of the final EIS is pending the ASLB's decision. 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 has delayed 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. Duke Energy Carolinas 2023 North Carolina Rate Case On January 19, 2023, Duke Energy Carolinas filed a performance-based regulation (PBR) application with the NCUC to request an increase in base rate retail revenues. The PBR application included a multiyear rate plan (MYRP) to recover projected capital investments during the three-year MYRP period. In addition to the MYRP, the PBR application included an Earnings Sharing Mechanism, Residential Decoupling Mechanism and Performance Incentive Mechanisms (PIMS) as required by HB 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 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). 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 included, 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-year MYRP, including $4.6 billion (North Carolina retail allocation) projected to go in service over the MYRP period. Additionally, the partial settlement included agreement, with certain adjustments, on depreciation rates, the recovery of grid improvement plan costs and 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. On December 1 5, 2023, the NCUC issued an order approving Duke Energy Carolinas' PBR application, as modified by the partial settlements and the order, including an overall retail revenue increase of $436 million in Year 1, $174 million in Year 2 and $158 million in Year 3, for a combined total of $768 million. T he order established an ROE of 10.1% based upon an equity ratio of 53% and approved, with certain adjustments, depreciation rates and the recovery of grid improvement plan costs and certain deferred COV ID-related costs. Additionally, the Residential Decoupling Mechanism and PIMs were approved as requested under the PBR application and revised by the partial settlements. Duke Energy Carolinas implemented interim rates, subject to refund, on September 1, 2023. New revised Year 1 rates and the residential decoupling were implemented on January 15, 2024. On February 13, 2024, a number of parties filed Notices of Appeal of the December 15, 2023, NCUC order. Notices of Appeal were filed by the Carolina Industrial Group for Fair Utility Rates (CIGFUR) III, a collection of various electric membership corporations (collectively, the EMCs), and the North Carolina Attorney General’s Office (the AGO). CIGFUR III and the EMCs appealed the interclass subsidy reduction percentage and the Transmission Cost Allocation stipulation. In addition, CIGFUR III appealed the NCUC’s elimination of the equal percentage fuel cost allocation methodology. The AGO appealed several issues including the authorized ROE and certain rate design and accounting matters . On March 1, 2024, Carolina Utility Customers Association, Inc. appealed several issues, including the authorized ROE and certain rate design and accounting matters. In July 2024, the Supreme Court of North Carolina consolidated the appeal with the parallel appeal of the NCUC's order regarding the Duke Energy Progress PBR application. The briefing is scheduled to be completed by December 31, 2024. Duke Energy Carolinas anticipates a decision to be issued by the third quarter of 2025. 2024 South Carolina Rate Case On January 4, 2024, Duke Energy Carolinas filed a rate case with the PSCSC to request an increase in base rate retail revenues. On May 17, 2024, Duke Energy Carolinas and the Office of Regulatory Staff, as well as other consumer, environmental, and industrial intervening parties, filed an Agreement and Stipulation of Settlement reso lving all issues in the base rate proceeding. The major components of the settlement include a $240 million annual customer rate increase, prior to a reduction from the accelerated return to customers of federal unprotected Property, Plant and Equipment related EDIT of $84 million annually over the first two years. The stipulation includes an ROE of 9.94% with an equity ratio of 51.21% and resolves recovery of the Company's continued investments in the grid, its new corporate headquarters and environmental compliance costs. The PSCSC held a hearing on May 20, 2024, to consider evidence supporting the stipulation. On July 3, 2024, the PSCSC issued its final order approving an increase in base rates and approving nearly all components of the Agreement and Stipulation of Settlement. The order revised recovery of certain environmental compliance costs, the only provision of the settlement agreement not fully approved by the PSCSC. As a result, Duke Energy Carolinas recognized pretax charges of $33 million within Impairment of assets and other charges, $2 million within Operations, maintenance and other, partially offset by an $11 million reduction in Interest expense, for the nine months ended September 30, 2024 , on the Condense d Consolidated Statements of Operations. Based upon the order, after accelerating the EDIT giveback to customers, the net rate increase is $150 million annually for the first two years. Revised customer rat es were effective August 1, 2024, an d are based upon a South Carolina retail rate base of $7.4 billion. Marshall Combustion Turbines CPCN On March 14, 2024, Duke Energy Carolinas filed with the NCUC an application to construct and operate two hydrogen-capable advanced-class simple-cycle combustion turbines (CTs) at the site of the existing Marshall Steam Station. The two new CTs – totaling approximately 850 MW – will enable the retirement of Marshall coal units 1 and 2 and provide incremental capacity to support system capacity needs and expanded flexibility to support integration of renewables. Pending regulatory approvals, construction is planned to start in 2026, and the CTs are targeted to be placed into service by the end of 2028. As part of the application, Duke Energy Carolinas noted that Construction Work in Progress for the proposed facility will accrue AFUDC and will not be in rate base, resulting in no impact on Duke Energy Carolinas' North Carolina retail revenue requirement during the construction period. The 2029 North Carolina retail revenue requirement for the proposed facility is estimated to be $104 million, representing an approximate average retail rate increase of 2.2% across all classes. The expert witness hearing concluded on August 6, 2024. An order is expected no later than December 31, 2024, in parallel with the NCUC’s order in the Carolinas Resource Plan proceeding. 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-year MYRP period. In addition to the MYRP, the PBR application included an Earnings Sharing Mechanism, Residential Decoupling Mechanism and PIMs as required by HB 951. 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 transmission and distribution investments since the last rate case and projected in the MYRP, as well as investments in energy storage and solar assets included in the MYRP consistent with the Carbon Plan. 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-year MYRP proposal. In May 2023, CIGFUR II joined this partial settlement and Public Staff and CIGFUR II filed a separate settlement reaching agreement on PIMs, Tracking Metrics and the Residential Decoupling Mechanism under t 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, including 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-year MYRP, including $3.5 billion (North Carolina retail allocation) projected to go in service over the MYRP period. The order established an ROE of 9.8% based upon an equity ratio of 53% and approved, with certain adjustments, depreciation rates and the recovery of grid improvement plan costs and certain deferred COV 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 II and Haywood Electric Membership Corporation each filed a Notice of Appeal of the August 18, 2023 NCUC order. Both parties are appealing certain matters that do not impact the overall revenue requirement in the rate case. Specifically, they appealed the interclass subsidy reduction percentage, and CIGFUR II also appealed the Customer Assistance Program and the equal percentage fuel cost allocation methodology. On November 6, 2023, the AGO filed a Notice of Cross Appeal of the NCUC's determination regarding the exclusion of electric vehicle revenue from the residential decoupling mechanism. On November 9, 2023, Du ke Energy Progress, the Public Staff, CIGFUR II, and a number of other parties reached a settlement pursuant to which CIGFUR II agreed not to pursue its appeal of the Customer Assistance Program. In July 2024, the Supreme Court of North Carolina consolidated the appeal with the parallel appeal of the NCUC's order regarding the Duke Energy Carolinas PBR application . The briefing is scheduled to be completed by December 31, 2024. Duke Energy Progress anticipates a decision to be issued by the third quarter of 2025. 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 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. The storm recovery bonds of $177 million were issued by Duke Energy Progress on April 25, 202 4. Duke Energy Progress implemented storm recovery charges effective May 1, 2024. See Notes 6 and 13 for more information. Person County Combined Cycle CPCN On March 28, 2024, Duke Energy Progress filed with the NCUC its application to construct and operate a 1,360-MW hydrogen-capable, advanced-class combined-cycle generating facility (CC) in Person County at the site of the existing Roxboro Plant. Subject to negotiation of final contractual terms, the new Roxboro CC will be co-owned with the North Carolina Electric Membership Corporation (NCEMC), with Duke Energy Progress owning approximately 1,135 MW and NCEMC owning the remaining 225 MW. Pending regulatory approvals, construction is planned to start in 2026, with the CC targeted to be placed in service by the end of 2028. The CC will allow for the retirement of Roxboro’s coal-fired units 1 and 4. As part of the application, Duke Energy Progress noted that the recovery of Construction Work in Progress during the construction period for the proposed facility may be pursued in a future rate case. The 2029 North Carolina retail revenue requirement for the proposed facility is estimated to be $98 million, representing an approximate average retail rate increase of 2.6% across all classes. The expert witness hearing concluded on August 8, 2024. An order is expected no later than December 31, 2024, in parallel with the NCUC’s order in the Carolinas Resource Plan proceeding. 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 upon an equity ratio of 53%. 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. In return, 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, 2024, Duke Energy Florida has recognized $165 million (pretax) into earnings, including $8 million and $31 million recognized during the three months ended September 30, 2024, and 2023, respectively, and $24 million and $94 million recognized during the nine months ended September 30, 2024, and 2023, respectively. The remaining $8 million is expected to be recognized in the fourth quarter of 2024. 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 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 consisting 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 is 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 back 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. 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 answer brief on July 17, 2023. The OPC's reply brief was filed on October 16, 2023. The Florida Supreme Court heard oral arguments on February 7, 2024 and the parties await the court's decision. 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. 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 FPS

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
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 Accounts Payable within Other Current Liabilities and Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets. (in millions) September 30, 2024 December 31, 2023 Reserves for Environmental Remediation Duke Energy $ 80 $ 88 Duke Energy Carolinas 25 23 Progress Energy 19 19 Duke Energy Progress 9 9 Duke Energy Florida 10 10 Duke Energy Ohio 28 36 Duke Energy Indiana 2 2 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 For open litigation, unless otherwise noted, Duke Energy and the Subsidiary Registrants cannot predict the outcome or ultimate resolution of their respective matters. 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 damage, personal injury and wrongful death allegedly caused by the power outages that plaintiffs claim were the collective failure of generators including Duke Energy entities, 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 separate 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. In the cases against the generators, plaintiffs have dismissed the claims against Duke Energy (Parent). However, before Duke Energy (Parent) was dismissed from all cases, on December 14, 2023, without argument, the Court of Appeals accepted mandamus of the generator defendants’ ap peal, which includes all Duke Energy entities, and directed the MDL court to dismiss all claims. Plaintiffs filed their Petition for Reconsideration on January 29, 20 24, and the generator defendants responded on May 6, 2024. Regardless of the outcome of any motion for reconsideration or appeal, claims against Duke Energy (Parent) will remain dismissed. In October 2023, in conjunction with the closing of the sale of the utility-scale solar and wind group, all but one of the project company lawsuits transferred to Brookfield. In May 2024, the remaining claim in the lawsuit was transferred to the buyer in connection with the sale of a portion of the remaining Commercial Renewables assets. See Note 2 for more information related to the sale of the Commercial Renewables Disposal Groups. Duke Energy Carolinas 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 an 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. Oral argument took place on May 7, 2024. On August 5, 2024, the U.S. Court of Appeals for the Fourth Circuit reversed the district court's grant of summary judgment and remanded the case back to the district court for further proceedings. On August 19, 2024, Duke Energy Carolinas filed a petition for rehe aring, which is fully briefed and awaiting the court's decision. 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 $402 million at September 30, 2024, and $423 million at December 31, 2023. 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 2044 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 2044 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 $539 million at September 30, 2024, a nd $572 million at December 31, 2023. 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 as of September 30, 2024 , and December 31, 2023, for both Duke Energy and Duke Energy Carolinas. 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 to Duke Energy, and as a result, AEGIS was dismissed from the litigation on July 13, 2023. Duke Energy In diana has also reached confidential settlements with other various insurance companies, the results of which were not material. In June 2024, Duke Energy Indiana filed an amended complaint adding several additional insurance companies as defendants to the litigation and the court entered an order staying the litigation until January 22, 2025. 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, 2024
Debt Disclosure [Abstract]
Debt and Credit Facilities	DEBT AND CREDIT FACILITIES SUMMARY OF SIGNIFICANT DEBT ISSUANCES The following table summarizes significant debt issuances (in millions). Nine Months Ended September 30, 2024 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 January 2024 (a) January 2027 4.850 % $ 600 $ 600 $ — $ — $ — $ — $ — $ — January 2024 (a) January 2029 4.850 % 650 650 — — — — — — April 2024 (e) April 2031 5.648 % 815 815 — — — — — — June 2024 (d) June 2034 5.450 % 750 750 — — — — — — June 2024 (d) June 2054 5.800 % 750 750 — — — — — — June 2024 (h) July 2031 5.900 % 80 — — — — 80 — — June 2024 (h) July 2034 6.000 % 95 — — — — 95 — — June 2024 (h) July 2039 6.170 % 50 — — — — 50 — — August 2024 (d) February 2035 5.100 % 375 — — — — — — 375 August 2024 (i) September 2054 6.450 % 1,000 1,000 — — — — — — Secured Debt April 2024 (f) March 2044 5.404 % 177 — — 177 — — — — First Mortgage Bonds January 2024 (b) January 2034 4.850 % $ 575 $ — $ 575 $ — — $ — $ — $ — January 2024 (b) January 2054 5.400 % 425 — 425 — — — — — March 2024 (b) March 2034 5.250 % 300 — — — — — 300 — March 2024 (c) March 2034 5.100 % 500 — — 500 — — — — March 2024 (d) March 2054 5.550 % 425 — — — — 425 — — April 2024 (g) April 2074 5.008 % 173 — — — 173 — — — Total issuances $ 7,740 $ 4,565 $ 1,000 $ 677 $ 173 $ 650 $ 300 $ 375 (a) Proceeds were used to repay the remaining $1 billion outstanding on Duke Energy (Parent)'s variable rate Term Loan Facility due March 2024, pay down a portion of short-term debt and for general corporate purposes. Duke Energy (Parent)'s Term Loan Facility was terminated in March 2024 in conjunction with the payoff of remaining borrowings. (b) Proceeds were used to pay down a portion of short-term debt and for general company purposes. (c) Proceeds were used to fund eligible green energy projects, pay down a portion of short-term debt and for general company purposes. (d) Proceeds were used to pay down a portion of short-term debt and for general corporate purposes. (e) In April 2024, Duke Energy issued 750 million euros aggregate principal amount of 3.75% senior notes due April 2031. Duke Energy's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. The $815 million equivalent in U.S. dollars were used to repay a portion of a $1 billion debt maturity due April 2024, pay down short-term debt and for general corporate purposes. See Note 10 for additional information. (f) Proceeds were used to finance the South Carolina portion of restoration expenditures related to the following storms: Pax, Ulysses, Matthew, Florence, Michael, Dorian, Izzy and Jasper. See Notes 4 and 13 for more information. (g) Debt has a floating interest rate. Proceeds were used to pay down a portion of the DEFR accounts receivable securitization facility due in April 2024, and for general company purposes. See Note 13 for more information. (h) Debt issued by Duke Energy Kentucky with proceeds used to pay down a portion of short-term debt and for general corporate purposes. (i) Duke Energy issued $1 billion of fixed-to-fixed reset rate junior subordinated debentures (the debentures) with proceeds used to redeem Duke Energy’s outstanding Series B Preferred Stock and for general corporate purposes. The debentures will bear interest at 6.45% until September 1, 2034, and thereafter the interest rate will reset every five years to the five-year U.S. Treasury rate plus a spread of 2.588%. The debentures have early redemption options and are callable on or after June 2034 for 100% of the principal plus accrued interest. See Note 15 for additional information. 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, 2024 Unsecured Debt Duke Energy (Parent) April 2025 3.364 % $ 420 Duke Energy (Parent) April 2025 3.950 % 250 Duke Energy (Parent) September 2025 0.900 % 650 Duke Energy Ohio June 2025 6.900 % 150 Duke Energy Progress August 2025 3.250 % 500 Piedmont September 2025 3.600 % 150 Secured Debt Duke Energy Carolinas (a) January 2025 6.036 % 305 Duke Energy Carolinas (a) January 2025 6.097 % 195 Duke Energy Progress (a) April 2025 6.096 % 240 Duke Energy Progress (a) April 2025 6.096 % 160 First Mortgage Bonds Duke Energy Florida (a)(b) October 2073 5.005 % 200 Duke Energy Florida (a)(b) April 2074 5.008 % 173 Other (c) 204 Current maturities of long-term debt $ 3,597 (a) Debt has a floating interest rate. (b) These first mortgage bonds are classified as Current maturities of long-term debt on the Consolidated Balance Sheets based on terms of the indentures, which could require repayment in less than 12 months if exercised by the bondholders. (c) 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 2024, Duke Energy extended the termination date of its existing $9 billion Master Credit Facility to March 2029. 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, 2024 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 $ 1,400 $ 1,500 $ 875 $ 1,050 $ 950 $ 950 Reduction to backstop issuances Commercial paper (b) (3,526) (1,526) (300) (698) (175) (206) (160) (461) Outstanding letters of credit (24) (12) (4) (1) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 5,369 $ 737 $ 1,096 $ 801 $ 693 $ 844 $ 709 $ 489 (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. Duke Energy Term Loan Facility On March 26, 2024, Duke Energy (Parent) entered into a 364-day term loan facility with commitments totaling $700 million. Any undrawn commitments could be drawn up until April 25, 2024, (30 days after the effective date of the agreement) or are otherwise ineligible to be drawn. On April 24, 2024, $500 million was drawn under the facility with borrowings used for general corporate purposes. Borrowings could be prepaid at any time throughout the term of the facility and the terms and conditions of the facility were generally consistent with those governing Duke Energy's Master Credit Facility. During the second quarter of 2024, Duke Energy (Parent) terminated the facility and repaid the $500 million in outstanding borrowings. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida Term Loan Facilities In November 2024, Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida entered into term loan facilities intended to meet incremental financing needs resulting from expenditures for the restoration of service and rebuilding of infrastructure related to hurricanes Debby, Helene and Milton as described in Note 4. Duke Energy Carolinas and Duke Energy Progress entered into two-year term loan facilities with commitments totaling $700 million and $250 million, respectively. Duke Energy Florida entered into a 364-day term loan facility with commitments totaling $800 million. Amounts may be drawn for six months from the Duke Energy Carolinas and Duke Energy Progress term loan facilities and for four months from the Duke Energy Florida term loan facility. Borrowings from the term loan facilities can be prepaid at any time and may be used to fund system restoration expenses and for general corporate purposes. Additionally, the Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida term loan facilities may be increased by $300 million, $150 million and $400 million, respectively. In November 2024, $50 million, $50 million and $100 million were drawn under the term loan facilities for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively.

Asset Retirement Obligations

Asset Retirement Obligations	9 Months Ended
	Sep. 30, 2024
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, 2024 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 $ 4,634 $ 2,024 $ 2,605 $ 2,483 $ 122 $ — $ — $ — Closure of ash impoundments 5,240 1,899 2,019 2,001 18 72 1,249 — Other 276 57 99 34 65 65 29 27 Total ARO $ 10,150 $ 3,980 $ 4,723 $ 4,518 $ 205 $ 137 $ 1,278 $ 27 Less: Current portion 639 253 227 225 2 7 152 — Total noncurrent ARO $ 9,511 $ 3,727 $ 4,496 $ 4,293 $ 203 $ 130 $ 1,126 $ 27 ARO Liability Rollforward In April 2024, the EPA issued the 2024 CCR Rule under the Resource Conservation and Recovery Act, which significantly expands the scope of the 2015 CCR Rule by establishing regulatory requirements for inactive surface impoundments at retired generating facilities and previously unregulated coal ash sources at regulated facilities. 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, 2023 (a) $ 9,156 $ 4,013 $ 4,145 $ 3,870 $ 275 $ 136 $ 809 $ 26 Accretion expense (b) 316 137 145 138 7 5 33 1 Liabilities settled (c) (485) (154) (254) (181) (73) (6) (70) — Revisions in estimates of cash flows (d) 1,163 (16) 687 691 (4) 2 506 — Balance at September 30, 2024 $ 10,150 $ 3,980 $ 4,723 $ 4,518 $ 205 $ 137 $ 1,278 $ 27 (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, 2024, 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 revision amounts represent the change in discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The increases primarily relate to additional scope requirements to regulate the disposal of CCR in landfills and surface impoundments as a result of the 2024 CCR Rule, including an increase in groundwater monitoring wells.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2024
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, 2024, and December 31, 2023. 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, 2024, and December 31, 2023. 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 2024.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2024
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. 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) 2024 2023 2024 2023 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 186 $ 198 $ 589 $ 586 Indemnification coverages (b) 11 9 33 26 JDA revenue (c) 7 5 29 26 JDA expense (c) 48 58 141 121 Intercompany natural gas purchases (d) 5 5 14 14 Progress Energy Corporate governance and shared service expenses (a) $ 165 $ 172 $ 524 $ 522 Indemnification coverages (b) 13 11 42 35 JDA revenue (c) 48 58 141 121 JDA expense (c) 7 5 29 26 Intercompany natural gas purchases (d) 19 19 56 56 Duke Energy Progress Corporate governance and shared service expenses (a) $ 104 $ 103 $ 318 $ 314 Indemnification coverages (b) 5 5 17 15 JDA revenue (c) 48 58 141 121 JDA expense (c) 7 5 29 26 Intercompany natural gas purchases (d) 19 19 56 56 Duke Energy Florida Corporate governance and shared service expenses (a) $ 61 $ 69 $ 206 $ 208 Indemnification coverages (b) 8 6 25 20 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 74 $ 73 $ 228 $ 222 Indemnification coverages (b) 2 1 5 4 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 98 $ 92 $ 283 $ 275 Indemnification coverages (b) 2 2 7 6 Piedmont Corporate governance and shared service expenses (a) $ 40 $ 32 $ 121 $ 107 Indemnification coverages (b) 1 1 3 3 Intercompany natural gas sales (d) 24 24 70 70 Natural gas storage and transportation costs (e) 5 6 17 18 (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 were previously 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 were largely cash but included a subordinated note from CRC for a portion of the purchase price. In March 2024, Duke Energy repaid all outstanding CRC borrowings and terminated the related CRC credit facility. 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, 2024 Intercompany income tax receivable $ — $ — $ — $ — $ 7 $ 28 $ 39 Intercompany income tax payable 115 96 53 38 — — — December 31, 2023 Intercompany income tax receivable $ — $ — $ — $ — $ 91 $ 53 $ — Intercompany income tax payable 81 92 94 114 — — 57

Derivatives and Hedging

Derivatives and Hedging	9 Months Ended
	Sep. 30, 2024
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. 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, 2024, and 2023, 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, 2024 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 2,825 $ — $ — $ — $ — $ — $ — Undesignated contracts 3,202 1,150 1,775 1,125 650 250 27 Total notional amount $ 6,027 $ 1,150 $ 1,775 $ 1,125 $ 650 $ 250 $ 27 December 31, 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 $ 2,300 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,727 1,050 1,250 925 325 400 27 Total notional amount $ 5,027 $ 1,050 $ 1,250 $ 925 $ 325 $ 400 $ 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, 2024 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 19,823 — — — 2,474 17,349 — Natural gas (millions of dekatherms) 791 264 244 244 — 30 253 December 31, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 13,608 — — — 1,616 11,992 — Natural gas (millions of dekatherms) 846 279 274 274 — 30 263 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, 2024. Fair Value Gain (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 2024 2023 2024 2023 Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ 23 $ (20) $ 23 $ (10) 537 5.31 % 500 euros 3.85 % June 2034 19 (17) 19 (9) 815 5.648 % 750 euros 3.75 % April 2031 29 — 20 — Total notional amount $ 1,997 1,850 euros $ 71 $ (37) $ 62 $ (19) (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 CONDENS ED 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, 2024 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 $ 37 $ 10 $ 8 $ 8 $ — $ 2 $ 16 $ 2 Noncurrent 33 14 19 19 — — — — Total Derivative Assets – Commodity Contracts $ 70 $ 24 $ 27 $ 27 $ — $ 2 $ 16 $ 2 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 20 — — — — — — — Not Designated as Hedging Instruments Noncurrent 18 2 6 6 — — 10 — Total Derivative Assets – Interest Rate Contracts $ 38 $ 2 $ 6 $ 6 $ — $ — $ 10 $ — Foreign Currency Contracts Designated as Hedging Instruments Noncurrent 54 — — — — — — — Total Derivative Assets – Foreign Currency Contracts $ 54 $ — $ — $ — $ — $ — $ — $ — Total Derivative Assets $ 162 $ 26 $ 33 $ 33 $ — $ 2 $ 26 $ 2 Derivative Liabilities September 30, 2024 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 $ 170 $ 93 $ 56 $ 56 $ — $ — $ 4 $ 17 Noncurrent 209 57 45 45 — — — 107 Total Derivative Liabilities – Commodity Contracts $ 379 $ 150 $ 101 $ 101 $ — $ — $ 4 $ 124 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 52 — — — — — — — Not Designated as Hedging Instruments Current 5 — 5 5 — — — — Noncurrent 95 36 59 34 26 1 — — Total Derivative Liabilities – Interest Rate Contracts $ 152 $ 36 $ 64 $ 39 $ 26 $ 1 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current 30 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 30 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 561 $ 186 $ 165 $ 140 $ 26 $ 1 $ 4 $ 124 Derivative Assets December 31, 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 $ 25 $ 1 $ 3 $ 1 $ 2 $ 1 $ 18 $ 1 Noncurrent 57 26 31 31 — — — — Total Derivative Assets – Commodity Contracts $ 82 $ 27 $ 34 $ 32 $ 2 $ 1 $ 18 $ 1 Interest Rate Contracts Designated as Hedging Instruments Current 31 — — — — — — — Noncurrent 17 — — — — — — — Not Designated as Hedging Instruments Current 5 5 — — — — — — Noncurrent 10 3 — — — — 7 — Total Derivative Assets – Interest Rate Contracts $ 63 $ 8 $ — $ — $ — $ — $ 7 $ — Foreign Currency Contracts Designated as Hedging Instruments Noncurrent 44 — — — — — — — Total Derivative Assets – Foreign Currency Contracts $ 44 $ — $ — $ — $ — $ — $ — $ — Total Derivative Assets $ 189 $ 35 $ 34 $ 32 $ 2 $ 1 $ 25 $ 1 Derivative Liabilities December 31, 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 $ 354 $ 177 $ 138 $ 138 $ — $ — $ 18 $ 20 Noncurrent 255 67 61 61 — — — 127 Total Derivative Liabilities – Commodity Contracts $ 609 $ 244 $ 199 $ 199 $ — $ — $ 18 $ 147 Interest Rate Contracts Designated as Hedging Instruments Current 25 — — — — — — — Noncurrent 26 — — — — — — — Not Designated as Hedging Instruments Current 13 2 11 11 — — — — Noncurrent 39 14 24 9 15 1 — — Total Derivative Liabilities – Interest Rate Contracts $ 103 $ 16 $ 35 $ 20 $ 15 $ 1 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current 17 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 17 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 729 $ 260 $ 234 $ 219 $ 15 $ 1 $ 18 $ 147 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, 2024 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 $ 37 $ 10 $ 8 $ 8 $ — $ 2 $ 16 $ 2 Offset (15) (8) (7) (7) — — — — Net amounts presented in Current Assets: Other $ 22 $ 2 $ 1 $ 1 $ — $ 2 $ 16 $ 2 Noncurrent Gross amounts recognized $ 125 $ 16 $ 25 $ 25 $ — $ — $ 10 $ — Offset (26) (10) (16) (16) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 99 $ 6 $ 9 $ 9 $ — $ — $ 10 $ — Derivative Liabilities September 30, 2024 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 $ 205 $ 93 $ 61 $ 61 $ — $ — $ 4 $ 17 Offset (15) (8) (7) (7) — — — — Cash collateral posted (23) (13) (5) (5) — — (4) — Net amounts presented in Current Liabilities: Other $ 167 $ 72 $ 49 $ 49 $ — $ — $ — $ 17 Noncurrent Gross amounts recognized $ 356 $ 93 $ 104 $ 79 $ 26 $ 1 $ — $ 107 Offset (26) (10) (16) (16) — — — — Cash collateral posted (30) (22) (9) (9) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 300 $ 61 $ 79 $ 54 $ 26 $ 1 $ — $ 107 Derivative Assets December 31, 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 $ 61 $ 6 $ 3 $ 1 $ 2 $ 1 $ 18 $ 1 Offset (2) (1) (1) (1) — — — — Net amounts presented in Current Assets: Other $ 59 $ 5 $ 2 $ — $ 2 $ 1 $ 18 $ 1 Noncurrent Gross amounts recognized $ 128 $ 29 $ 31 $ 31 $ — $ — $ 7 $ — Offset (37) (14) (22) (22) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 91 $ 15 $ 9 $ 9 $ — $ — $ 7 $ — Derivative Liabilities December 31, 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 $ 409 $ 179 $ 149 $ 149 $ — $ — $ 18 $ 20 Offset (2) (1) (1) (1) — — — — Cash collateral posted (96) (48) (30) (30) — — (18) — Net amounts presented in Current Liabilities: Other $ 311 $ 130 $ 118 $ 118 $ — $ — $ — $ 20 Noncurrent Gross amounts recognized $ 320 $ 81 $ 85 $ 70 $ 15 $ 1 $ — $ 127 Offset (37) (14) (22) (22) — — — — Cash collateral posted (66) (38) (28) (28) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 217 $ 29 $ 35 $ 20 $ 15 $ 1 $ — $ 127 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, 2024 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 198 $ 103 $ 95 $ 95 Fair value of collateral already posted 48 34 14 14 Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 150 $ 69 $ 81 $ 81 December 31, 2023 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 342 $ 175 $ 166 $ 166 Fair value of collateral already posted 144 86 58 58 Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 198 $ 89 $ 108 $ 108 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, 2024
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 nuclear decommissioning trust funds (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, 2024, and December 31, 2023. 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, 2024 December 31, 2023 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 $ — $ — $ 151 $ — $ — $ 133 Equity securities 6,005 11 8,224 4,942 22 7,278 Corporate debt securities 20 29 721 12 43 632 Municipal bonds 5 10 342 6 16 347 U.S. government bonds 37 46 1,824 24 65 1,575 Other debt securities 3 7 248 1 13 178 Total NDTF Investments $ 6,070 $ 103 $ 11,510 $ 4,985 $ 159 $ 10,143 Other Investments Cash and cash equivalents $ — $ — $ 68 $ — $ — $ 31 Equity securities 62 — 188 33 — 158 Corporate debt securities — 3 92 — 6 82 Municipal bonds 1 1 89 1 2 77 U.S. government bonds — 2 55 — 2 65 Other debt securities — 2 48 — 2 47 Total Other Investments $ 63 $ 8 $ 540 $ 34 $ 12 $ 460 Total Investments $ 6,133 $ 111 $ 12,050 $ 5,019 $ 171 $ 10,603 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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 61 $ 61 $ 256 $ 107 Realized losses 19 35 64 117 AFS: Realized gains 10 16 22 37 Realized losses 8 45 44 104 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, 2024 December 31, 2023 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 $ — $ — $ 69 $ — $ — $ 51 Equity securities 3,476 8 4,729 2,886 14 4,196 Corporate debt securities 9 25 458 4 35 390 Municipal bonds — 3 42 — 4 50 U.S. government bonds 19 25 976 13 33 826 Other debt securities 3 7 231 1 13 172 Total NDTF Investments $ 3,507 $ 68 $ 6,505 $ 2,904 $ 99 $ 5,685 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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 38 $ 43 $ 163 $ 70 Realized losses 9 17 30 64 AFS: Realized gains 6 12 11 21 Realized losses 5 26 22 54 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, 2024 December 31, 2023 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 $ — $ — $ 82 $ — $ — $ 82 Equity securities 2,529 3 3,495 2,056 8 3,082 Corporate debt securities 11 4 263 8 8 242 Municipal bonds 5 7 300 6 12 297 U.S. government bonds 18 21 848 11 32 749 Other debt securities — — 17 — — 6 Total NDTF Investments $ 2,563 $ 35 $ 5,005 $ 2,081 $ 60 $ 4,458 Other Investments Cash and cash equivalents $ — $ — $ 21 $ — $ — $ 18 Municipal bonds — — 24 — 1 23 Total Other Investments $ — $ — $ 45 $ — $ 1 $ 41 Total Investments $ 2,563 $ 35 $ 5,050 $ 2,081 $ 61 $ 4,499 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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 23 $ 18 $ 93 $ 37 Realized losses 10 18 34 53 AFS: Realized gains 4 4 11 16 Realized losses 3 19 22 50 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, 2024 December 31, 2023 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 $ — $ — $ 61 $ — $ — $ 55 Equity securities 2,407 3 3,361 1,956 8 2,970 Corporate debt securities 10 4 252 7 8 229 Municipal bonds 5 7 300 6 12 297 U.S. government bonds 17 13 666 10 18 518 Other debt securities — — 16 — — 6 Total NDTF Investments $ 2,439 $ 27 $ 4,656 $ 1,979 $ 46 $ 4,075 Other Investments Cash and cash equivalents $ — $ — $ 16 $ — $ — $ 14 Total Other Investments $ — $ — $ 16 $ — $ — $ 14 Total Investments $ 2,439 $ 27 $ 4,672 $ 1,979 $ 46 $ 4,089 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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 23 $ 15 $ 93 $ 34 Realized losses 10 18 34 52 AFS: Realized gains 4 4 11 15 Realized losses 3 18 21 47 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, 2024 December 31, 2023 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 $ — $ — $ 21 $ — $ — $ 27 Equity securities 122 — 134 100 — 112 Corporate debt securities 1 — 11 1 — 13 U.S. government bonds 1 8 182 1 14 231 Other debt securities — — 1 — — — Total NDTF Investments (a) $ 124 $ 8 $ 349 $ 102 $ 14 $ 383 Other Investments Cash and cash equivalents $ — $ — $ 2 $ — $ — $ 3 Municipal bonds — — 24 — 1 23 Total Other Investments $ — $ — $ 26 $ — $ 1 $ 26 Total Investments $ 124 $ 8 $ 375 $ 102 $ 15 $ 409 (a) During the nine months ended September 30, 2024, and the year ended December 31, 2023, 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, 2024, and 2023, 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, 2024 December 31, 2023 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 $ — $ — $ 2 $ — $ — $ 1 Equity securities 22 — 117 4 — 98 Corporate debt securities — — 7 — — 8 Municipal bonds 1 1 52 1 1 46 U.S. government bonds — — 7 — — 10 Total Investments $ 23 $ 1 $ 185 $ 5 $ 1 $ 163 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, 2024, and 2023, were immaterial. DEBT SECURITY MATURITIES The table below summarizes the maturity date for debt securities. September 30, 2024 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 92 $ 9 $ 68 $ 10 $ 58 $ 7 Due after one through five years 862 347 431 326 105 20 Due after five through 10 years 712 426 234 220 14 13 Due after 10 years 1,753 925 719 678 41 26 Total $ 3,419 $ 1,707 $ 1,452 $ 1,234 $ 218 $ 66

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2024
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 New York Stock Exchange 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. 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, 2023, 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, 2024. 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, 2024 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 151 $ 151 $ — $ — $ — NDTF equity securities 8,224 8,195 — — 29 NDTF debt securities 3,135 1,012 2,123 — — Other equity securities 188 188 — — — Other debt securities 284 48 236 — — Other cash and cash equivalents 68 68 — — — Derivative assets 162 2 143 17 — Total assets 12,212 9,664 2,502 17 29 Derivative liabilities (561) (34) (527) — — Net assets $ 11,651 $ 9,630 $ 1,975 $ 17 $ 29 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 133 $ 133 $ — $ — $ — NDTF equity securities 7,278 7,241 — — 37 NDTF debt securities 2,732 829 1,903 — — Other equity securities 158 158 — — — Other debt securities 271 55 216 — — Other cash and cash equivalents 31 31 — — — Derivative assets 189 37 137 15 — Total assets 10,792 8,484 2,256 15 37 Derivative liabilities (729) (60) (669) — — Net assets $ 10,063 $ 8,424 $ 1,587 $ 15 $ 37 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) 2024 2023 2024 2023 Balance at beginning of period $ 35 $ 41 $ 15 $ 34 Purchases, sales, issuances and settlements: Purchases — 3 29 50 Settlements (13) (18) (36) (76) Total (losses) gains included on the Condensed Consolidated Balance Sheet (5) 4 9 22 Balance at end of period $ 17 $ 30 $ 17 $ 30 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, 2024 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 69 $ 69 $ — $ — NDTF equity securities 4,729 4,700 — 29 NDTF debt securities 1,707 491 1,216 — Derivative assets 26 — 26 — Total assets 6,531 5,260 1,242 29 Derivative liabilities (186) — (186) — Net assets $ 6,345 $ 5,260 $ 1,056 $ 29 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 51 $ 51 $ — $ — NDTF equity securities 4,196 4,159 — 37 NDTF debt securities 1,438 375 1,063 — Derivative assets 35 — 35 — Total assets 5,720 4,585 1,098 37 Derivative liabilities (260) — (260) — Net assets $ 5,460 $ 4,585 $ 838 $ 37 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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 82 $ 82 $ — $ 82 $ 82 $ — NDTF equity securities 3,495 3,495 — 3,082 3,082 — NDTF debt securities 1,428 521 907 1,294 454 840 Other debt securities 24 — 24 23 — 23 Other cash and cash equivalents 21 21 — 18 18 — Derivative assets 33 — 33 34 — 34 Total assets 5,083 4,119 964 4,533 3,636 897 Derivative liabilities (165) — (165) (234) — (234) Net assets $ 4,918 $ 4,119 $ 799 $ 4,299 $ 3,636 $ 663 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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 61 $ 61 $ — $ 55 $ 55 $ — NDTF equity securities 3,361 3,361 — 2,970 2,970 — NDTF debt securities 1,234 375 859 1,050 266 784 Other cash and cash equivalents 16 16 — 14 14 — Derivative assets 33 — 33 32 — 32 Total assets 4,705 3,813 892 4,121 3,305 816 Derivative liabilities (140) — (140) (219) — (219) Net assets $ 4,565 $ 3,813 $ 752 $ 3,902 $ 3,305 $ 597 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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 21 $ 21 $ — $ 27 $ 27 $ — NDTF equity securities 134 134 — 112 112 — NDTF debt securities 194 146 48 244 188 56 Other debt securities 24 — 24 23 — 23 Other cash and cash equivalents 2 2 — 3 3 — Derivative assets — — — 2 — 2 Total assets 375 303 72 411 330 81 Derivative liabilities (26) — (26) (15) — (15) Net assets $ 349 $ 303 $ 46 $ 396 $ 330 $ 66 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, 2024, and December 31, 2023. 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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 117 $ 117 $ — $ — $ 98 $ 98 $ — $ — Other debt securities 66 — 66 — 64 — 64 — Other cash and cash equivalents 2 2 — — 1 1 — — Derivative assets 26 — 11 15 25 5 7 13 Total assets 211 119 77 15 188 104 71 13 Derivative liabilities (4) (4) — — (18) (18) — — Net assets $ 207 $ 115 $ 77 $ 15 $ 170 $ 86 $ 71 $ 13 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) 2024 2023 2024 2023 Balance at beginning of period $ 33 $ 37 $ 13 $ 29 Purchases, sales, issuances and settlements: Purchases — — 27 42 Settlements (13) (14) (33) (70) Total (losses) gains included on the Condensed Consolidated Balance Sheet (5) 4 8 26 Balance at end of period $ 15 $ 27 $ 15 $ 27 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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ 2 $ 2 $ — $ 1 $ 1 $ — Derivative liabilities (124) — (124) (147) — (147) Net (liabilities) assets $ (122) $ 2 $ (124) $ (146) $ 1 $ (147) QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. September 30, 2024 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 2 RTO auction pricing FTR price – per MWh $ — - $ 1.35 $ 0.56 Duke Energy Indiana FTRs 15 RTO auction pricing FTR price – per MWh (0.76) - 12.83 1.19 Duke Energy Total Level 3 derivatives $ 17 December 31, 2023 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 2 RTO auction pricing FTR price – per MWh $ 0.36 - $ 2.11 $ 0.71 Duke Energy Indiana FTRs 13 RTO auction pricing FTR price – per MWh (1.05) - 9.64 1.26 Duke Energy Total Level 3 derivatives $ 15 OTHER FAIR VALUE DISCLOSURES The fair value and book value of long-term debt, including current maturities, is summarized in the following table. 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, 2024 December 31, 2023 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 80,121 $ 76,285 $ 75,252 $ 69,790 Duke Energy Carolinas 17,032 16,342 16,012 15,077 Progress Energy 24,214 23,422 23,759 22,553 Duke Energy Progress 12,323 11,430 11,714 10,595 Duke Energy Florida 10,248 10,124 10,401 10,123 Duke Energy Ohio 4,164 4,087 3,518 3,310 Duke Energy Indiana 4,801 4,605 4,502 4,230 Piedmont 4,003 3,754 3,668 3,336 (a) Book value of long-term debt inc lude s $1.0 billion at September 30, 2024 and December 31, 2023, 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, 2024, and December 31, 2023, 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, 2024
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, 2024, and the year ended December 31, 2023, 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, DEPR and DEFR credit facilities 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. In April 2024, Duke Energy Florida repaid all outstanding DEFR borrowings totaling $325 million and terminated the related DEFR credit facility. Additionally, Duke Energy Florida's related restricted receivables outstanding at DEFR at the time of termination totaled $459 million and were transferred back to Duke Energy Florida to be collected and reported as Receivables on the Condensed Consolidated Balance Sheets. Receivables Financing – CRC CRC is a bankruptcy remote, special purpose entity indirectly owned by Duke Energy. On a revolving basis, CRC bought certain accounts receivable arising from the sale of electricity, natural gas and related services from Duke Energy Ohio and Duke Energy Indiana. CRC then borrowed amounts under a credit facility to buy the receivables from Duke Energy Ohio and Duke Energy Indiana. Borrowing availability from the credit facility was limited to the amount of qualified receivables sold to CRC, which generally excluded receivables past due more than a predetermined number of days and reserved for expected past-due balances. The sole source of funds to satisfy the related debt obligation was cash collections from the receivables. The proceeds Duke Energy Ohio and Duke Energy Indiana received from the sale of receivables to CRC were approximately 75% cash and 25% in the form of a subordinated note from CRC. The subordinated note was a retained interest in the receivables sold. Depending on collection experience, additional equity infusions to CRC would be required by Duke Energy to maintain a minimum equity balance of $3 million. CRC was considered a VIE because (i) equity capitalization was insufficient to support its operations, (ii) power to direct the activities that most significantly impact the economic performance of the entity was not held by the equity holder and (iii) deficiencies in net worth of CRC were funded by Duke Energy. The most significant activities that impacted the economic performance of CRC were decisions made to manage delinquent receivables. Duke Energy was considered the primary beneficiary and consolidated CRC as it made these decisions. Neither Duke Energy Ohio nor Duke Energy Indiana consolidated CRC. In March 2024, Duke Energy repaid all outstanding CRC borrowings totaling $350 million and terminated the related CRC credit facility. Additionally, Duke Energy's related restricted receivables outstanding at CRC at the time of termination totaled $682 million, consisting of $316 million and $366 million of restricted receivables that were transferred back to Duke Energy Indiana and Duke Energy Ohio, respectively, to be collected and reported as Receivables on the Condensed Consolidated Balance Sheets. 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 (a) January 2025 April 2025 (b) Credit facility amount (a) $ 500 $ 400 (b) Amounts borrowed at September 30, 2024 — 500 400 — Amounts borrowed at December 31, 2023 312 500 400 325 Restricted Receivables at September 30, 2024 — 1,149 822 — Restricted Receivables at December 31, 2023 663 991 833 532 (a) In March 2024, Duke Energy repaid all outstanding CRC borrowings and terminated the related $350 million CRC credit facility. (b) In April 2024, Duke Energy Florida repaid all outstanding DEFR borrowings and terminated the related $325 million DEFR credit facility. Nuclear Asset-Recovery Bonds 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, 2024 December 31, 2023 Regulatory Assets: Current 60 59 Current Assets: Other 18 37 Other Noncurrent Assets: Regulatory assets 754 803 Current Liabilities: Other 2 8 Current maturities of long-term debt 59 59 Long-Term Debt 772 831 Storm Recovery Bonds Duke Energy Carolinas NC Storm Funding, LLC (DECNCSF), Duke Energy Progress NC Storm Funding, LLC (DEPNCSF) and Duke Energy Progress SC Storm Funding, LLC (DEPSCSF) are bankruptcy remote, wholly owned special purpose subsidiaries of Duke Energy Carolinas and Duke Energy Progress. DECNCSF and DEPNCSF were formed in 2021 while DEPSCSF was formed in 2024, all 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 incurred in North Carolina and South Carolina. 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. In April 2024, DEPSCSF issued $177 million of senior secured bonds an d used the proceeds to acquire storm recovery property from Duke Energy Progress. The storm recovery property was created by state legislation and a PSCSC financing order for the purpose of financing storm costs incurred from 2014 through 2022. 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’ North Carolina and South Carolina 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. These entities are considered VIEs primarily because their 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. Duke Energy Carolinas consolidates DECNCSF and Duke Energy Progress consolidates DEPNCSF and DEPSCSF. The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. September 30, 2024 December 31, 2023 Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Carolinas Progress (in millions) DECNCSF DEPNCSF DEPSCSF DECNCSF DEPNCSF Regulatory Assets: Current $ 12 $ 39 $ 8 $ 12 $ 39 Current Assets: Other 6 19 8 9 31 Other Noncurrent Assets: Regulatory assets 188 617 157 196 643 Other Noncurrent Assets: Other 1 4 1 1 2 Current Liabilities: Other 1 4 4 10 34 Current Maturities of Long-Term Debt 10 34 9 3 8 Long-Term Debt 198 646 163 208 680 Procurement Company – Duke Energy Florida Duke Energy Florida Purchasing Company, LLC (DEF ProCo) is a wholly owned special purpose subsidiary of Duke Energy Florida. DEF ProCo was formed in 2023 as the primary procurement agent for equipment, materials and supplies for Duke Energy Florida. DEF ProCo interacts with third-party suppliers on Duke Energy Florida’s behalf with credit and risk support provided by Duke Energy Florida. DEF ProCo is a qualified reseller under Florida tax law and conveys acquired assets to Duke Energy Florida through leases on each acquired asset. This entity is considered a VIE primarily because the equity capitalization is insufficient to support their operations. Duke Energy Florida has the power to direct the significant activities of this VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates the procurement company. The following table summarizes the impact of this VIE on Duke Energy Florida's Consolidated Balance Sheets. (in millions) September 30, 2024 December 31, 2023 Inventory $ 477 $ 462 Accounts Payable 199 188 NON-CONSOLIDATED VIEs The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. September 30, 2024 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ — $ — Investments in equity method unconsolidated affiliates 55 — — Other noncurrent assets 30 — — Total assets $ 85 $ — $ — Other current liabilities 4 — — Other noncurrent liabilities 1 — — Total liabilities $ 5 $ — $ — Net assets $ 80 $ — $ — December 31, 2023 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 150 $ 208 Investments in equity method unconsolidated affiliates 67 — — Other noncurrent assets 43 — — Total assets $ 110 $ 150 $ 208 Other current liabilities 4 — — Other noncurrent liabilities 5 — — Total liabilities $ 9 $ — $ — Net assets $ 101 $ 150 $ 208 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 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 as of December 31, 2023. The subordinated notes held by Duke Energy Ohio and Duke Energy Indiana are stated at fair value as of December 31, 2023. The following table shows the gross and net receivables sold. See discussion under Consolidated VIEs for additional information related to CRC's termination in March 2024. Duke Energy Ohio Duke Energy Indiana (in millions) September 30, 2024 December 31, 2023 September 30, 2024 December 31, 2023 Receivables sold $ — $ 361 $ — $ 351 Less: Retained interests — 150 — 208 Net receivables sold $ — $ 211 $ — $ 143 The following table shows sales and cash flows related to receivables sold and reflects CRC activity prior to its termination in March 2024. Duke Energy Ohio Duke Energy Indiana Nine Months Ended Nine Months Ended September 30, September 30, (in millions) 2024 2023 2024 2023 Sales Receivables sold $ 474 $ 1,973 $ 473 $ 2,646 Loss recognized on sale 7 25 6 15 Cash flows Cash proceeds from receivables sold $ 478 $ 2,024 $ 523 $ 2,465 Collection fees received — 1 — 1 Return received on retained interests 4 15 4 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, 2024
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) 2024 2025 2026 2027 2028 Thereafter Total Duke Energy Carolinas $ 3 $ 12 $ 12 $ 12 $ 12 $ — $ 51 Progress Energy 18 30 7 7 7 29 98 Duke Energy Progress 2 — — — — — 2 Duke Energy Florida 16 30 7 7 7 29 96 Duke Energy Indiana 4 17 17 15 5 — 58 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) 2024 2025 2026 2027 2028 Thereafter Total Piedmont $ 16 $ 60 $ 51 $ 49 $ 46 $ 195 $ 417 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, 2024 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 $ 3,738 $ 1,173 $ 1,973 $ 811 $ 1,162 $ 275 $ 316 $ — General 2,287 859 1,035 485 550 152 243 — Industrial 924 416 275 196 79 39 193 — Wholesale 620 158 394 350 44 15 53 — Other revenues 237 71 166 88 78 24 23 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 7,806 $ 2,677 $ 3,843 $ 1,930 $ 1,913 $ 505 $ 828 $ — Gas Utilities and Infrastructure Residential $ 157 $ — $ — $ — $ — $ 74 $ — $ 83 Commercial 91 — — — — 23 — 68 Industrial 36 — — — — 6 — 30 Power Generation — — — — — — — 8 Other revenues 25 — — — — 5 — 20 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 309 $ — $ — $ — $ — $ 108 $ — $ 209 Other Revenue from contracts with customers $ 12 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 8,127 $ 2,677 $ 3,843 $ 1,930 $ 1,913 $ 613 $ 828 $ 209 Other revenue sources (a) $ 27 $ 30 $ 17 $ (16) $ 27 $ (8) $ 8 $ 10 Total revenues $ 8,154 $ 2,707 $ 3,860 $ 1,914 $ 1,940 $ 605 $ 836 $ 219 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 (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, 2024 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 $ 9,945 $ 3,190 $ 5,115 $ 2,214 $ 2,901 $ 768 $ 872 $ — General 6,234 2,331 2,834 1,334 1,500 448 624 — Industrial 2,615 1,130 808 556 252 110 566 — Wholesale 1,698 423 1,086 974 112 39 150 — Other revenues 783 269 502 257 245 64 96 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 21,275 $ 7,343 $ 10,345 $ 5,335 $ 5,010 $ 1,429 $ 2,308 $ — Gas Utilities and Infrastructure Residential $ 859 $ — $ — $ — $ — $ 307 $ — $ 552 Commercial 434 — — — — 111 — 323 Industrial 115 — — — — 23 — 92 Power Generation — — — — — — — 24 Other revenues 97 — — — — 19 — 78 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,505 $ — $ — $ — $ — $ 460 $ — $ 1,069 Other Revenue from contracts with customers $ 30 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 22,810 $ 7,343 $ 10,345 $ 5,335 $ 5,010 $ 1,889 $ 2,308 $ 1,069 Other revenue sources (a) $ 187 $ 68 $ 100 $ 3 $ 82 $ 2 $ 34 $ 70 Total revenues $ 22,997 $ 7,411 $ 10,445 $ 5,338 $ 5,092 $ 1,891 $ 2,342 $ 1,139 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. The following table presents the reserve for credit losses for trade and other receivables. Three Months Ended September 30, 2023 and 2024 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, 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 Balance at June 30, 2024 $ 207 $ 65 $ 73 $ 47 $ 26 $ 42 $ 16 $ 11 Write-Offs (29) (13) (16) (10) (6) — — — Credit Loss Expense 34 15 18 7 11 — — 1 Other Adjustments 6 3 4 4 — (1) — — Balance at September 30, 2024 $ 218 $ 70 $ 79 $ 48 $ 31 $ 41 $ 16 $ 12 Nine Months Ended September 30, 2023 and 2024 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 $ 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 Balance at December 31, 2023 $ 205 $ 56 $ 74 $ 44 $ 31 $ 9 $ 5 $ 11 Write-Offs (97) (41) (49) (29) (20) — — (4) Credit Loss Expense 79 32 38 17 21 2 2 5 Other Adjustments 31 23 16 16 (1) 30 9 — Balance at September 30, 2024 $ 218 $ 70 $ 79 $ 48 $ 31 $ 41 $ 16 $ 12 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.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY 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. 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) 2024 2023 2024 2023 Net Income available to Duke Energy common stockholders $ 1,226 $ 1,213 $ 3,211 $ 1,744 Less: Income (Loss) from discontinued operations attributable to Duke Energy common stockholders 22 (190) 9 (1,283) Accumulated preferred stock dividends adjustment 14 12 14 12 Less: Impact of participating securities 2 2 4 4 Income from continuing operations available to Duke Energy common stockholders $ 1,216 $ 1,413 $ 3,212 $ 3,035 Income (Loss) from discontinued operations, net of tax $ 25 $ (152) $ 12 $ (1,316) Add: (Income) Loss attributable to NCI (3) (38) (3) 33 Income (Loss) from discontinued operations attributable to Duke Energy common stockholders $ 22 $ (190) $ 9 $ (1,283) Weighted average common shares outstanding – basic 772 771 772 771 Equity forwards 1 — — — Weighted average common shares outstanding – diluted 773 771 772 771 EPS from continuing operations available to Duke Energy common stockholders Basic and diluted (a) $ 1.57 $ 1.83 $ 4.16 $ 3.94 Income (Loss) Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and diluted (a) $ 0.03 $ (0.24) $ 0.01 $ (1.67) Potentially dilutive items excluded from the calculation (b) 2 2 2 2 Dividends declared per common share $ 1.045 $ 1.025 $ 3.095 $ 3.035 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 were payable semiannually in arrears on the 16th day of March and September. The preferred stock was redeemed on September 16, 2024. Common Stock In November 2022, Duke Energy filed a prospectus supplement and executed an Equity Distribution Agreement (EDA) under which it may sell up to $1.5 billion of its common stock through an at-the-market (ATM) offering program, including an equity forward sales component. Under the terms of the EDA, Duke Energy may issue and sell shares of common stock through September 2025. The following table shows ATM equity issuances pursuant to forward contracts executed during the nine months ended September 30, 2024. Tranche Shares Priced Initial Forward Price 1 802,371 $ 92.77 2 729,674 $ 101.10 3 737,280 $ 100.99 4 662,266 $ 111.45 Total 2,931,591 The equity forwards require Duke Energy to either physically settle the transactions by issuing shares in exchange for net proceeds at the then-applicable forward sale price specified by the agreements or net settle in whole or in part through the delivery or receipt of cash or shares. The settlement alternatives are at Duke Energy's election. No amounts have or will be recorded in Duke Energy's Condensed Consolidated Financial Statements with respect to the ATM offering until settlement of the equity forwards occurs, which is expected by December 31, 2024. The initial forward sale prices will be subject to adjustment on a daily basis based on a floating interest rate factor and will decrease by other fixed amounts specified in the relevant forward sale agreements. Until settlement of the equity forwards, earnings per share dilution resulting from the agreements, if any, will be determined under the treasury stock method. Preferred Stock On September 16, 2024, Duke Energy redeemed all 1 million outstanding shares of Series B Preferred Stock for a redemption price of $1,000 per share or $1 billion in total. Following the redemption, dividends ceased to accrue on the shares of Series B Preferred Stock, shares of the Series B Preferred Stock were no longer deemed outstanding and all rights of the holders of such shares of Series B Preferred Stock terminated. In conjunction with the redemption, Duke Energy recorded $16 million in preferred stock redemption costs, calculated as the difference of $11 million between the carrying value on the redemption date of the Series B Preferred Stock and the total amount of consideration paid to redeem, and including the recognition of an excise tax liability under the IRA of $5 million. The preferred stock redemption costs were recorded as a reduction to Retained earnings on Duke Energy Corporations' Condensed Consolidated Balance Sheets during the three months ended September 30, 2024.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2024
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, 2024 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Contributions made: 2024 $ 100 $ 26 $ 23 $ 14 $ 9 $ 5 $ 8 $ 3 2023 $ 100 $ 26 $ 22 $ 13 $ 9 $ 5 $ 8 $ 3 Duke Energy uses a December 31 measurement date for its qualified non-contributory defined benefit retirement plan assets and obligations. However, because Duke Energy believes it is probable in 2024 that total lump-sum benefit payments for one of its defined benefit retirement plans will exceed the settlement threshold, which is defined as the sum of the service cost and interest cost on projected benefit obligation components of net periodic pension costs, Duke Energy remeasured the plan's assets and plan's projected benefit obligation as of September 30, 2024. The discount rate used for the September 30, 2024 remeasurement was 5.0% and the cash balance interest crediting rate was 4.0%. The interest rate for lump sum and annuity conversions was updated to reflect current market conditions. All other assumptions used for the September 30, 2024, remeasurement were consistent with the measurement as of December 31, 2023. As a result of the remeasurement, Duke Energy recognized a remeasurement loss of $11 million, of which $10 million was recorded in Regulatory Assets within Other Noncurrent Assets and $1 million was recorded in Accumulated Other Comprehensive Loss within the Condensed Consolidated Balance Sheets as of September 30, 2024. The remeasurement loss, which represents a decrease in funded status of the plan, reflects an increase of $117 million in the fair value of the plan's assets and an increase of $128 million in the plan's projected benefit obligation. As the result of settlement accounting, Duke Energy recognized settlement charges of $72 million, of which $60 million was recorded to Regulatory Assets within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets and $12 million was recorded to Other Income and Expenses, net, within the Condensed Consolidated Statement of Operations as of September 30, 2024. QUALIFIED PENSION PLANS The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended September 30, 2024 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 $ 8 $ 5 $ 3 $ 1 $ 1 $ 1 Interest cost on projected benefit obligation 82 19 26 12 14 5 6 2 Expected return on plan assets (154) (41) (55) (25) (29) (6) (10) (5) Amortization of actuarial loss 9 2 2 1 1 — 1 1 Amortization of prior service credit (3) — — — — — — (1) Amortization of settlement charges 17 5 7 6 — 2 — 2 Net periodic pension costs $ (21) $ (6) $ (12) $ (1) $ (11) $ 2 $ (2) $ — 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) Nine Months Ended September 30, 2024 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 85 $ 28 $ 24 $ 15 $ 10 $ 2 $ 4 $ 3 Interest cost on projected benefit obligation 247 59 78 36 42 13 19 7 Expected return on plan assets (462) (122) (163) (75) (87) (19) (31) (15) Amortization of actuarial loss 25 6 7 4 3 1 3 2 Amortization of prior service credit (10) — — — — — (1) (5) Amortization of settlement charges 26 9 9 8 1 2 1 4 Net periodic pension costs $ (89) $ (20) $ (45) $ (12) $ (31) $ (1) $ (5) $ (4) 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) 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, 2024, and 2023. OTHER POST-RETIREMENT BENEFIT PLANS Net periodic costs for OPEB plans were not material for the three and nine months ended September 30, 2024, and 2023.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES On August 16, 2022, the IRA was signed into law. Among other provisions, the IRA created a new, zero-emission nuclear power PTC available for taxpayers beginning January 1, 2024. Through September 30, 2024, Duke Energy Carolinas and Duke Energy Progress have recorded PTC deferred tax assets of approximately $325 million and $59 million, respectively. These amounts represent the estimated net realizable value of the PTCs, which were deferred to a regulatory liability. The Company will continue to assess its calculations and interpretations as new information and guidance becomes available. The Subsidiary Registrants will work with the state utility commissions on the appropriate regulatory process to pass the net realizable value back to customers over time. See Note 4 for additional information on Duke Energy Carolinas' approval for a stand-alone rider starting January 1, 2025. In October 2024, $174 million of tax credits were sold for proceeds approximating carrying value, including $150 million of nuclear power PTCs sold by Duke Energy Carolinas. 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, 2024 2023 2024 2023 Duke Energy 11.2 % 2.8 % 12.5 % 9.0 % Duke Energy Carolinas 7.7 % 4.9 % 9.8 % 8.0 % Progress Energy 16.1 % 15.7 % 16.4 % 16.2 % Duke Energy Progress 12.9 % 11.8 % 14.1 % 13.0 % Duke Energy Florida 20.5 % 20.8 % 19.9 % 20.3 % Duke Energy Ohio 11.9 % 14.9 % 15.8 % 15.8 % Duke Energy Indiana 15.7 % 18.5 % 16.3 % 17.8 % Piedmont 29.4 % 26.3 % 18.4 % 17.2 % The increase in the ETR for Duke Energy for the three months ended September 30, 2024, was primarily due to benefits associated with tax efficiency efforts in the prior year and a decrease in the amortization of EDIT. In 2023, the Company evaluated the deductibility of certain items spanning periods 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 in the prior year of approximately $120 million. The increase in the ETR for Duke Energy for the nine months ended September 30, 2024, was primarily due to benefits associated with tax efficiency efforts in the prior year. In 2023, the Company evaluated the deductibility of certain items spanning periods 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 in the prior year of approximately $120 million. The increase in the ETR for Duke Energy Carolinas for the three months ended September 30, 2024, was primarily due to a decrease in the amortization of EDIT. The increase in the ETR for Duke Energy Carolinas for the nine months ended September 30, 2024, was primarily due to the amortization of EDIT in relation to higher pretax income. The increase in the ETR for Duke Energy Progress for the three months ended September 30, 2024, was primarily due to a decrease in the amortization of EDIT. The increase in the ETR for Duke Energy Progress for the nine months ended September 30, 2024, was primarily due to the amortization of EDIT in relation to higher pretax income. The decrease in the ETR for Duke Energy Ohio for the three months ending September 30, 2024, was primarily due to the amortization of EDIT in relation to pretax income. The decrease in the ETR for Duke Energy Indiana for the three and nine months ended September 30, 2024, was primarily due to an increase in the amortization of EDIT. The increase in the ETR for Piedmont for the three months ending September 30, 2024, was primarily due to the amortization of EDIT in relation to higher pretax losses. The increase in the ETR for Piedmont for the nine months ending September 30, 2024, was primarily due a decrease in the amortization of EDIT.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS For information on subsequent events related to regulatory matters, debt and credit facilities and income taxes, see Notes 4, 6 and 17, respectively.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 1,281	$ 1,252	$ 3,319	$ 1,836

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policy)	9 Months Ended
	Sep. 30, 2024
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 Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2023. 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, 2024, and 2023, the Income (Loss) 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 CASH
New Accounting Standards	NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2024.
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.
Accounts Payable	ACCOUNTS PAYABLE Duke Energy has a voluntary supply chain finance program (the “program”) that allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to a global financial institution at a rate that leverages Duke Energy’s credit rating and which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program determine at their sole discretion, which invoices they will sell to the financial institution. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms, which are based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program.

Organization and Basis of Pre_3

Organization and Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 December 31, 2023 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 376 $ 13 $ 82 $ 46 $ 16 $ 253 $ 9 $ 59 $ 18 $ 24 Other 51 6 45 27 18 76 9 67 31 36 Other Noncurrent Assets Other 18 1 11 5 7 16 1 9 2 7 Total cash, cash equivalents and restricted cash $ 445 $ 20 $ 138 $ 78 $ 41 $ 345 $ 19 $ 135 $ 51 $ 67
Schedule of Utility Inventory	The components of inventory are presented in the tables below. September 30, 2024 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 $ 3,229 $ 1,076 $ 1,580 $ 1,052 $ 528 $ 141 $ 381 $ 12 Coal 810 360 232 161 71 21 197 — Natural gas, oil and other fuel 299 46 194 107 87 11 2 46 Total inventory $ 4,338 $ 1,482 $ 2,006 $ 1,320 $ 686 $ 173 $ 580 $ 58 December 31, 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 $ 3,086 $ 1,075 $ 1,465 $ 963 $ 502 $ 139 $ 361 $ 12 Coal 842 364 231 154 77 28 219 — Natural gas, oil and other fuel 364 45 205 110 95 12 2 100 Total inventory $ 4,292 $ 1,484 $ 1,901 $ 1,227 $ 674 $ 179 $ 582 $ 112
Schedule of Accounts Payable Finance Programs	The following table represents the changes in confirmed obligations outstanding for the nine months ended September 30, 2024, and 2023. Three Months Ended September 30, 2023 and 2024 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 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 Confirmed obligations outstanding at June 30, 2024 $ 28 $ — $ — $ — $ — $ — $ — $ 28 Invoices confirmed during the period 26 — 1 — 1 — — 25 Confirmed invoices paid during the period (28) — — — — — — (28) Confirmed obligations outstanding at September 30, 2024 $ 26 $ — $ 1 $ — $ 1 $ — $ — $ 25 Nine Months Ended September 30, 2023 and 2024 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 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 Confirmed obligations outstanding at December 31, 2023 $ 50 $ — $ 3 $ — $ 3 $ — $ — $ 47 Invoices confirmed during the period 146 — 2 — 2 — — 144 Confirmed invoices paid during the period (170) — (4) — (4) — — (166) Confirmed obligations outstanding at September 30, 2024 $ 26 $ — $ 1 $ — $ 1 $ — $ — $ 25

Dispositions (Tables)

Dispositions (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 December 31, 2023 Current Assets Held for Sale Other $ 4 $ 14 Total current assets held for sale 4 14 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 101 247 Accumulated depreciation and amortization (24) (57) Net property, plant and equipment 77 190 Operating lease right-of-use assets, net 4 4 Other — 3 Total other noncurrent assets held for sale 4 7 Total Assets Held for Sale $ 85 $ 211 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 19 $ 9 Taxes accrued 1 3 Current maturities of long-term debt 43 5 Unrealized losses on commodity hedges 11 68 Other 3 37 Total current liabilities associated with assets held for sale 77 122 Noncurrent Liabilities Associated with Assets Held for Sale Long-Term debt — 39 Operating lease liabilities 5 5 Asset retirement obligations 5 8 Unrealized losses on commodity hedges 61 94 Other 14 11 Total other noncurrent liabilities associated with assets held for sale 85 157 Total Liabilities Associated with Assets Held for Sale $ 162 $ 279 As of September 30, 2024, and December 31, 2023, the noncontrolling interest balance is $17 million and $66 million, respectively. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Income (Loss) 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) 2024 2023 2024 2023 Operating revenues $ 2 $ 103 $ 9 $ 293 Operation, maintenance and other 3 93 19 270 Property and other taxes — 8 1 27 Other income and expenses, net — (2) — (9) Interest expense 1 10 3 53 Loss on disposal 17 169 22 1,603 Loss before income taxes (19) (179) (36) (1,669) Income tax benefit (44) (27) (48) (353) Income (Loss) from discontinued operations $ 25 $ (152) $ 12 $ (1,316) Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations (3) (38) (3) 33 Net income (loss) from discontinued operations attributable to Duke Energy Corporation $ 22 $ (190) $ 9 $ (1,283) Nine Months Ended September 30, (in millions) 2024 2023 Cash flows provided by (used in): Operating activities $ 6 $ 545 Investing activities (13) (597)

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 7,833 $ 309 $ 8,142 $ 12 $ — $ 8,154 Intersegment revenues 19 23 42 30 (72) — Total revenues $ 7,852 $ 332 $ 8,184 $ 42 $ (72) $ 8,154 Segment income (loss) (a)(b) $ 1,451 $ (25) $ 1,426 $ (222) $ — $ 1,204 Add: Noncontrolling interests 34 Add: Preferred dividends 39 Add: Preferred redemption costs 16 Discontinued operations 22 Net Income $ 1,315 Segment assets $ 161,471 $ 17,852 $ 179,323 $ 4,243 $ — $ 183,566 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) (c) $ 1,447 $ 15 $ 1,462 $ (59) $ — $ 1,403 Add: Noncontrolling interests 69 Add: Preferred dividends 39 Discontinued operations (190) Net Loss $ 1,321 (a) EU&I includes $17 million recorded within Operating Revenues on the Condensed Consolidated Statements of Operations and GU&I includes $1 million recorded within Operations, maintenance and other and $3 million recorded within Other income and expenses on the Condensed Consolidated Statements of Operations related to nonrecurring customer billing adjustments as a result of implementation of a new customer system. (b) Other includes $16 million recorded as Preferred Redemption Costs on the Condensed Consolidated Statements of Operations related to the redemption of Series B Preferred Stock. Refer to Note 15 for further information. (c) 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. Nine Months Ended September 30, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 21,420 $ 1,547 $ 22,967 $ 30 $ — $ 22,997 Intersegment revenues 55 68 123 90 (213) — Total revenues $ 21,475 $ 1,615 $ 23,090 $ 120 $ (213) $ 22,997 Segment income (loss) (a)(b) $ 3,562 $ 265 $ 3,827 $ (625) $ — $ 3,202 Add: Noncontrolling interests 68 Add: Preferred dividends 92 Add: Preferred redemption costs 16 Discontinued operations 9 Net Income $ 3,387 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) (c) $ 3,088 $ 327 $ 3,415 $ (388) $ — $ 3,027 Add: Noncontrolling interests 42 Add: Preferred dividends 92 Discontinued operations (1,283) Net Income $ 1,878 (a) EU&I includes $42 million recorded within Impairment of assets and other charges, $2 million within Operations, maintenance and other, and an $11 million reduction recorded within Interest Expense on Duke Energy Carolinas' and Duke Energy Progress' Condensed Consolidated Statement of Operations, related to the Duke Energy Carolinas' South Carolina rate case order. Additionally, EU&I includes $17 million recorded within Operating Revenues on the Condensed Consolidated Statements of Operations and GU&I includes $1 million recorded within Operations, maintenance and other and $3 million recorded within Other income and expenses on the Condensed Consolidated Statements of Operations related to nonrecurring customer billing adjustments as a result of implementation of a new customer system. (b) Other includes $16 million recorded as Preferred Redemption Costs on the Condensed Consolidated Statements of Operations related to the redemption of Series B Preferred Stock. Refer to Note 15 for further information. (c) 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.
Duke Energy Ohio
Segment Reporting Information [Line Items]
Business Segment Data	Three Months Ended September 30, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 497 $ 108 $ 605 $ — $ — $ 605 Segment income (loss)/Net income $ 57 $ (4) $ 53 $ (1) $ — $ 52 Segment assets $ 8,096 $ 4,456 $ 12,552 $ 13 $ 46 $ 12,611 Three Months Ended September 30, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 472 $ 105 $ 577 $ — $ 577 Segment income (loss)/Net income $ 65 $ 17 $ 82 $ (2) $ 80 Nine Months Ended September 30, 2024 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 1,431 $ 460 $ 1,891 $ — $ 1,891 Segment income (loss)/Net income $ 181 $ 46 $ 227 $ (4) $ 223 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

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2024
Regulated Operations [Abstract]
Total Storm Restoration Costs Across Subsidiary Registrants	As discussed further below, the Subsidiary Registrants were impacted by significant storms in 2024. Each Subsidiary Registrant is responsible for the restoration of service within its respective service territory and the recovery of related storm costs, including financing costs and, as applicable, the replenishment of storm-related reserves. The Subsidiary Registrants are considering all available avenues to recover storm-related costs, including insurance recovery and the securitization for certain costs, where applicable. Total storm restoration costs across the Subsidiary Registrants, including capital expenditures, for hurricanes Helene, Debby and Milton ar e estimated to be in the range of $2.4 billion to $2.9 billion and are expected to primarily impact the following registrants: (in millions) Cost Estimate Range (a) Duke Energy Carolinas $ 950 - $ 1,150 Duke Energy Progress 350 - 450 Duke Energy Florida 1,100 - 1,300 (a) These estimates do not include amounts for rebuilding certain damaged infrastructure, as estimates of such costs are not yet available, and will change as restoration work is completed and additional information is received on actual costs incurred. Duke Energy Florida was the only jurisdiction materially impacted by Hurricane Milton.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2024
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 Accounts Payable within Other Current Liabilities and Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets. (in millions) September 30, 2024 December 31, 2023 Reserves for Environmental Remediation Duke Energy $ 80 $ 88 Duke Energy Carolinas 25 23 Progress Energy 19 19 Duke Energy Progress 9 9 Duke Energy Florida 10 10 Duke Energy Ohio 28 36 Duke Energy Indiana 2 2 Piedmont 7 7

Debt and Credit Facilities (Tab

Debt and Credit Facilities (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table summarizes significant debt issuances (in millions). Nine Months Ended September 30, 2024 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 January 2024 (a) January 2027 4.850 % $ 600 $ 600 $ — $ — $ — $ — $ — $ — January 2024 (a) January 2029 4.850 % 650 650 — — — — — — April 2024 (e) April 2031 5.648 % 815 815 — — — — — — June 2024 (d) June 2034 5.450 % 750 750 — — — — — — June 2024 (d) June 2054 5.800 % 750 750 — — — — — — June 2024 (h) July 2031 5.900 % 80 — — — — 80 — — June 2024 (h) July 2034 6.000 % 95 — — — — 95 — — June 2024 (h) July 2039 6.170 % 50 — — — — 50 — — August 2024 (d) February 2035 5.100 % 375 — — — — — — 375 August 2024 (i) September 2054 6.450 % 1,000 1,000 — — — — — — Secured Debt April 2024 (f) March 2044 5.404 % 177 — — 177 — — — — First Mortgage Bonds January 2024 (b) January 2034 4.850 % $ 575 $ — $ 575 $ — — $ — $ — $ — January 2024 (b) January 2054 5.400 % 425 — 425 — — — — — March 2024 (b) March 2034 5.250 % 300 — — — — — 300 — March 2024 (c) March 2034 5.100 % 500 — — 500 — — — — March 2024 (d) March 2054 5.550 % 425 — — — — 425 — — April 2024 (g) April 2074 5.008 % 173 — — — 173 — — — Total issuances $ 7,740 $ 4,565 $ 1,000 $ 677 $ 173 $ 650 $ 300 $ 375 (a) Proceeds were used to repay the remaining $1 billion outstanding on Duke Energy (Parent)'s variable rate Term Loan Facility due March 2024, pay down a portion of short-term debt and for general corporate purposes. Duke Energy (Parent)'s Term Loan Facility was terminated in March 2024 in conjunction with the payoff of remaining borrowings. (b) Proceeds were used to pay down a portion of short-term debt and for general company purposes. (c) Proceeds were used to fund eligible green energy projects, pay down a portion of short-term debt and for general company purposes. (d) Proceeds were used to pay down a portion of short-term debt and for general corporate purposes. (e) In April 2024, Duke Energy issued 750 million euros aggregate principal amount of 3.75% senior notes due April 2031. Duke Energy's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. The $815 million equivalent in U.S. dollars were used to repay a portion of a $1 billion debt maturity due April 2024, pay down short-term debt and for general corporate purposes. See Note 10 for additional information. (f) Proceeds were used to finance the South Carolina portion of restoration expenditures related to the following storms: Pax, Ulysses, Matthew, Florence, Michael, Dorian, Izzy and Jasper. See Notes 4 and 13 for more information. (g) Debt has a floating interest rate. Proceeds were used to pay down a portion of the DEFR accounts receivable securitization facility due in April 2024, and for general company purposes. See Note 13 for more information. (h) Debt issued by Duke Energy Kentucky with proceeds used to pay down a portion of short-term debt and for general corporate purposes. (i) Duke Energy issued $1 billion of fixed-to-fixed reset rate junior subordinated debentures (the debentures) with proceeds used to redeem Duke Energy’s outstanding Series B Preferred Stock and for general corporate purposes. The debentures will bear interest at 6.45% until September 1, 2034, and thereafter the interest rate will reset every five years to the five-year U.S. Treasury rate plus a spread of 2.588%. The debentures have early redemption options and are callable on or after June 2034 for 100% of the principal plus accrued interest. See Note 15 for additional information. 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, 2024 Unsecured Debt Duke Energy (Parent) April 2025 3.364 % $ 420 Duke Energy (Parent) April 2025 3.950 % 250 Duke Energy (Parent) September 2025 0.900 % 650 Duke Energy Ohio June 2025 6.900 % 150 Duke Energy Progress August 2025 3.250 % 500 Piedmont September 2025 3.600 % 150 Secured Debt Duke Energy Carolinas (a) January 2025 6.036 % 305 Duke Energy Carolinas (a) January 2025 6.097 % 195 Duke Energy Progress (a) April 2025 6.096 % 240 Duke Energy Progress (a) April 2025 6.096 % 160 First Mortgage Bonds Duke Energy Florida (a)(b) October 2073 5.005 % 200 Duke Energy Florida (a)(b) April 2074 5.008 % 173 Other (c) 204 Current maturities of long-term debt $ 3,597 (a) Debt has a floating interest rate. (b) These first mortgage bonds are classified as Current maturities of long-term debt on the Consolidated Balance Sheets based on terms of the indentures, which could require repayment in less than 12 months if exercised by the bondholders. (c) 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, 2024 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 $ 1,400 $ 1,500 $ 875 $ 1,050 $ 950 $ 950 Reduction to backstop issuances Commercial paper (b) (3,526) (1,526) (300) (698) (175) (206) (160) (461) Outstanding letters of credit (24) (12) (4) (1) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 5,369 $ 737 $ 1,096 $ 801 $ 693 $ 844 $ 709 $ 489 (a) Represents the sublimit of each borrower. (b)

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	9 Months Ended
	Sep. 30, 2024
Asset Retirement Obligation [Abstract]
Schedule of Asset Retirement Obligations	The following table presents the AROs recorded on the Condensed Consolidated Balance Sheets. September 30, 2024 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 $ 4,634 $ 2,024 $ 2,605 $ 2,483 $ 122 $ — $ — $ — Closure of ash impoundments 5,240 1,899 2,019 2,001 18 72 1,249 — Other 276 57 99 34 65 65 29 27 Total ARO $ 10,150 $ 3,980 $ 4,723 $ 4,518 $ 205 $ 137 $ 1,278 $ 27 Less: Current portion 639 253 227 225 2 7 152 — Total noncurrent ARO $ 9,511 $ 3,727 $ 4,496 $ 4,293 $ 203 $ 130 $ 1,126 $ 27
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, 2023 (a) $ 9,156 $ 4,013 $ 4,145 $ 3,870 $ 275 $ 136 $ 809 $ 26 Accretion expense (b) 316 137 145 138 7 5 33 1 Liabilities settled (c) (485) (154) (254) (181) (73) (6) (70) — Revisions in estimates of cash flows (d) 1,163 (16) 687 691 (4) 2 506 — Balance at September 30, 2024 $ 10,150 $ 3,980 $ 4,723 $ 4,518 $ 205 $ 137 $ 1,278 $ 27 (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, 2024, 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 revision amounts represent the change in discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The increases primarily relate to additional scope requirements to regulate the disposal of CCR in landfills and surface impoundments as a result of the 2024 CCR Rule, including an increase in groundwater monitoring wells.

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2024
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, Other Revenue and Expense	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) 2024 2023 2024 2023 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 186 $ 198 $ 589 $ 586 Indemnification coverages (b) 11 9 33 26 JDA revenue (c) 7 5 29 26 JDA expense (c) 48 58 141 121 Intercompany natural gas purchases (d) 5 5 14 14 Progress Energy Corporate governance and shared service expenses (a) $ 165 $ 172 $ 524 $ 522 Indemnification coverages (b) 13 11 42 35 JDA revenue (c) 48 58 141 121 JDA expense (c) 7 5 29 26 Intercompany natural gas purchases (d) 19 19 56 56 Duke Energy Progress Corporate governance and shared service expenses (a) $ 104 $ 103 $ 318 $ 314 Indemnification coverages (b) 5 5 17 15 JDA revenue (c) 48 58 141 121 JDA expense (c) 7 5 29 26 Intercompany natural gas purchases (d) 19 19 56 56 Duke Energy Florida Corporate governance and shared service expenses (a) $ 61 $ 69 $ 206 $ 208 Indemnification coverages (b) 8 6 25 20 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 74 $ 73 $ 228 $ 222 Indemnification coverages (b) 2 1 5 4 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 98 $ 92 $ 283 $ 275 Indemnification coverages (b) 2 2 7 6 Piedmont Corporate governance and shared service expenses (a) $ 40 $ 32 $ 121 $ 107 Indemnification coverages (b) 1 1 3 3 Intercompany natural gas sales (d) 24 24 70 70 Natural gas storage and transportation costs (e) 5 6 17 18 (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) Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont September 30, 2024 Intercompany income tax receivable $ — $ — $ — $ — $ 7 $ 28 $ 39 Intercompany income tax payable 115 96 53 38 — — — December 31, 2023 Intercompany income tax receivable $ — $ — $ — $ — $ 91 $ 53 $ — Intercompany income tax payable 81 92 94 114 — — 57

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 2,825 $ — $ — $ — $ — $ — $ — Undesignated contracts 3,202 1,150 1,775 1,125 650 250 27 Total notional amount $ 6,027 $ 1,150 $ 1,775 $ 1,125 $ 650 $ 250 $ 27 December 31, 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 $ 2,300 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,727 1,050 1,250 925 325 400 27 Total notional amount $ 5,027 $ 1,050 $ 1,250 $ 925 $ 325 $ 400 $ 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, 2024 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 19,823 — — — 2,474 17,349 — Natural gas (millions of dekatherms) 791 264 244 244 — 30 253 December 31, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 13,608 — — — 1,616 11,992 — Natural gas (millions of dekatherms) 846 279 274 274 — 30 263 The following table shows Duke Energy's outstanding derivatives related to foreign currency risk at September 30, 2024. Fair Value Gain (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 2024 2023 2024 2023 Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ 23 $ (20) $ 23 $ (10) 537 5.31 % 500 euros 3.85 % June 2034 19 (17) 19 (9) 815 5.648 % 750 euros 3.75 % April 2031 29 — 20 — Total notional amount $ 1,997 1,850 euros $ 71 $ (37) $ 62 $ (19)
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, 2024 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 $ 37 $ 10 $ 8 $ 8 $ — $ 2 $ 16 $ 2 Noncurrent 33 14 19 19 — — — — Total Derivative Assets – Commodity Contracts $ 70 $ 24 $ 27 $ 27 $ — $ 2 $ 16 $ 2 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 20 — — — — — — — Not Designated as Hedging Instruments Noncurrent 18 2 6 6 — — 10 — Total Derivative Assets – Interest Rate Contracts $ 38 $ 2 $ 6 $ 6 $ — $ — $ 10 $ — Foreign Currency Contracts Designated as Hedging Instruments Noncurrent 54 — — — — — — — Total Derivative Assets – Foreign Currency Contracts $ 54 $ — $ — $ — $ — $ — $ — $ — Total Derivative Assets $ 162 $ 26 $ 33 $ 33 $ — $ 2 $ 26 $ 2 Derivative Liabilities September 30, 2024 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 $ 170 $ 93 $ 56 $ 56 $ — $ — $ 4 $ 17 Noncurrent 209 57 45 45 — — — 107 Total Derivative Liabilities – Commodity Contracts $ 379 $ 150 $ 101 $ 101 $ — $ — $ 4 $ 124 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 52 — — — — — — — Not Designated as Hedging Instruments Current 5 — 5 5 — — — — Noncurrent 95 36 59 34 26 1 — — Total Derivative Liabilities – Interest Rate Contracts $ 152 $ 36 $ 64 $ 39 $ 26 $ 1 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current 30 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 30 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 561 $ 186 $ 165 $ 140 $ 26 $ 1 $ 4 $ 124 Derivative Assets December 31, 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 $ 25 $ 1 $ 3 $ 1 $ 2 $ 1 $ 18 $ 1 Noncurrent 57 26 31 31 — — — — Total Derivative Assets – Commodity Contracts $ 82 $ 27 $ 34 $ 32 $ 2 $ 1 $ 18 $ 1 Interest Rate Contracts Designated as Hedging Instruments Current 31 — — — — — — — Noncurrent 17 — — — — — — — Not Designated as Hedging Instruments Current 5 5 — — — — — — Noncurrent 10 3 — — — — 7 — Total Derivative Assets – Interest Rate Contracts $ 63 $ 8 $ — $ — $ — $ — $ 7 $ — Foreign Currency Contracts Designated as Hedging Instruments Noncurrent 44 — — — — — — — Total Derivative Assets – Foreign Currency Contracts $ 44 $ — $ — $ — $ — $ — $ — $ — Total Derivative Assets $ 189 $ 35 $ 34 $ 32 $ 2 $ 1 $ 25 $ 1 Derivative Liabilities December 31, 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 $ 354 $ 177 $ 138 $ 138 $ — $ — $ 18 $ 20 Noncurrent 255 67 61 61 — — — 127 Total Derivative Liabilities – Commodity Contracts $ 609 $ 244 $ 199 $ 199 $ — $ — $ 18 $ 147 Interest Rate Contracts Designated as Hedging Instruments Current 25 — — — — — — — Noncurrent 26 — — — — — — — Not Designated as Hedging Instruments Current 13 2 11 11 — — — — Noncurrent 39 14 24 9 15 1 — — Total Derivative Liabilities – Interest Rate Contracts $ 103 $ 16 $ 35 $ 20 $ 15 $ 1 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current 17 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 17 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 729 $ 260 $ 234 $ 219 $ 15 $ 1 $ 18 $ 147
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, 2024 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 $ 37 $ 10 $ 8 $ 8 $ — $ 2 $ 16 $ 2 Offset (15) (8) (7) (7) — — — — Net amounts presented in Current Assets: Other $ 22 $ 2 $ 1 $ 1 $ — $ 2 $ 16 $ 2 Noncurrent Gross amounts recognized $ 125 $ 16 $ 25 $ 25 $ — $ — $ 10 $ — Offset (26) (10) (16) (16) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 99 $ 6 $ 9 $ 9 $ — $ — $ 10 $ — Derivative Liabilities September 30, 2024 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 $ 205 $ 93 $ 61 $ 61 $ — $ — $ 4 $ 17 Offset (15) (8) (7) (7) — — — — Cash collateral posted (23) (13) (5) (5) — — (4) — Net amounts presented in Current Liabilities: Other $ 167 $ 72 $ 49 $ 49 $ — $ — $ — $ 17 Noncurrent Gross amounts recognized $ 356 $ 93 $ 104 $ 79 $ 26 $ 1 $ — $ 107 Offset (26) (10) (16) (16) — — — — Cash collateral posted (30) (22) (9) (9) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 300 $ 61 $ 79 $ 54 $ 26 $ 1 $ — $ 107 Derivative Assets December 31, 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 $ 61 $ 6 $ 3 $ 1 $ 2 $ 1 $ 18 $ 1 Offset (2) (1) (1) (1) — — — — Net amounts presented in Current Assets: Other $ 59 $ 5 $ 2 $ — $ 2 $ 1 $ 18 $ 1 Noncurrent Gross amounts recognized $ 128 $ 29 $ 31 $ 31 $ — $ — $ 7 $ — Offset (37) (14) (22) (22) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 91 $ 15 $ 9 $ 9 $ — $ — $ 7 $ — Derivative Liabilities December 31, 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 $ 409 $ 179 $ 149 $ 149 $ — $ — $ 18 $ 20 Offset (2) (1) (1) (1) — — — — Cash collateral posted (96) (48) (30) (30) — — (18) — Net amounts presented in Current Liabilities: Other $ 311 $ 130 $ 118 $ 118 $ — $ — $ — $ 20 Noncurrent Gross amounts recognized $ 320 $ 81 $ 85 $ 70 $ 15 $ 1 $ — $ 127 Offset (37) (14) (22) (22) — — — — Cash collateral posted (66) (38) (28) (28) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 217 $ 29 $ 35 $ 20 $ 15 $ 1 $ — $ 127
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, 2024 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 $ 37 $ 10 $ 8 $ 8 $ — $ 2 $ 16 $ 2 Offset (15) (8) (7) (7) — — — — Net amounts presented in Current Assets: Other $ 22 $ 2 $ 1 $ 1 $ — $ 2 $ 16 $ 2 Noncurrent Gross amounts recognized $ 125 $ 16 $ 25 $ 25 $ — $ — $ 10 $ — Offset (26) (10) (16) (16) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 99 $ 6 $ 9 $ 9 $ — $ — $ 10 $ — Derivative Liabilities September 30, 2024 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 $ 205 $ 93 $ 61 $ 61 $ — $ — $ 4 $ 17 Offset (15) (8) (7) (7) — — — — Cash collateral posted (23) (13) (5) (5) — — (4) — Net amounts presented in Current Liabilities: Other $ 167 $ 72 $ 49 $ 49 $ — $ — $ — $ 17 Noncurrent Gross amounts recognized $ 356 $ 93 $ 104 $ 79 $ 26 $ 1 $ — $ 107 Offset (26) (10) (16) (16) — — — — Cash collateral posted (30) (22) (9) (9) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 300 $ 61 $ 79 $ 54 $ 26 $ 1 $ — $ 107 Derivative Assets December 31, 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 $ 61 $ 6 $ 3 $ 1 $ 2 $ 1 $ 18 $ 1 Offset (2) (1) (1) (1) — — — — Net amounts presented in Current Assets: Other $ 59 $ 5 $ 2 $ — $ 2 $ 1 $ 18 $ 1 Noncurrent Gross amounts recognized $ 128 $ 29 $ 31 $ 31 $ — $ — $ 7 $ — Offset (37) (14) (22) (22) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 91 $ 15 $ 9 $ 9 $ — $ — $ 7 $ — Derivative Liabilities December 31, 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 $ 409 $ 179 $ 149 $ 149 $ — $ — $ 18 $ 20 Offset (2) (1) (1) (1) — — — — Cash collateral posted (96) (48) (30) (30) — — (18) — Net amounts presented in Current Liabilities: Other $ 311 $ 130 $ 118 $ 118 $ — $ — $ — $ 20 Noncurrent Gross amounts recognized $ 320 $ 81 $ 85 $ 70 $ 15 $ 1 $ — $ 127 Offset (37) (14) (22) (22) — — — — Cash collateral posted (66) (38) (28) (28) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 217 $ 29 $ 35 $ 20 $ 15 $ 1 $ — $ 127
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, 2024 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 198 $ 103 $ 95 $ 95 Fair value of collateral already posted 48 34 14 14 Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 150 $ 69 $ 81 $ 81 December 31, 2023 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 342 $ 175 $ 166 $ 166 Fair value of collateral already posted 144 86 58 58 Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 198 $ 89 $ 108 $ 108

Investments in Debt and Equit_2

Investments in Debt and Equity Securities (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 December 31, 2023 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 $ — $ — $ 151 $ — $ — $ 133 Equity securities 6,005 11 8,224 4,942 22 7,278 Corporate debt securities 20 29 721 12 43 632 Municipal bonds 5 10 342 6 16 347 U.S. government bonds 37 46 1,824 24 65 1,575 Other debt securities 3 7 248 1 13 178 Total NDTF Investments $ 6,070 $ 103 $ 11,510 $ 4,985 $ 159 $ 10,143 Other Investments Cash and cash equivalents $ — $ — $ 68 $ — $ — $ 31 Equity securities 62 — 188 33 — 158 Corporate debt securities — 3 92 — 6 82 Municipal bonds 1 1 89 1 2 77 U.S. government bonds — 2 55 — 2 65 Other debt securities — 2 48 — 2 47 Total Other Investments $ 63 $ 8 $ 540 $ 34 $ 12 $ 460 Total Investments $ 6,133 $ 111 $ 12,050 $ 5,019 $ 171 $ 10,603
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, 2024 December 31, 2023 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 $ — $ — $ 151 $ — $ — $ 133 Equity securities 6,005 11 8,224 4,942 22 7,278 Corporate debt securities 20 29 721 12 43 632 Municipal bonds 5 10 342 6 16 347 U.S. government bonds 37 46 1,824 24 65 1,575 Other debt securities 3 7 248 1 13 178 Total NDTF Investments $ 6,070 $ 103 $ 11,510 $ 4,985 $ 159 $ 10,143 Other Investments Cash and cash equivalents $ — $ — $ 68 $ — $ — $ 31 Equity securities 62 — 188 33 — 158 Corporate debt securities — 3 92 — 6 82 Municipal bonds 1 1 89 1 2 77 U.S. government bonds — 2 55 — 2 65 Other debt securities — 2 48 — 2 47 Total Other Investments $ 63 $ 8 $ 540 $ 34 $ 12 $ 460 Total Investments $ 6,133 $ 111 $ 12,050 $ 5,019 $ 171 $ 10,603
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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 61 $ 61 $ 256 $ 107 Realized losses 19 35 64 117 AFS: Realized gains 10 16 22 37 Realized losses 8 45 44 104
Investments Classified by Contractual Maturity Date	The table below summarizes the maturity date for debt securities. September 30, 2024 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 92 $ 9 $ 68 $ 10 $ 58 $ 7 Due after one through five years 862 347 431 326 105 20 Due after five through 10 years 712 426 234 220 14 13 Due after 10 years 1,753 925 719 678 41 26 Total $ 3,419 $ 1,707 $ 1,452 $ 1,234 $ 218 $ 66
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, 2024 December 31, 2023 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 $ — $ — $ 69 $ — $ — $ 51 Equity securities 3,476 8 4,729 2,886 14 4,196 Corporate debt securities 9 25 458 4 35 390 Municipal bonds — 3 42 — 4 50 U.S. government bonds 19 25 976 13 33 826 Other debt securities 3 7 231 1 13 172 Total NDTF Investments $ 3,507 $ 68 $ 6,505 $ 2,904 $ 99 $ 5,685
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, 2024 December 31, 2023 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 $ — $ — $ 69 $ — $ — $ 51 Equity securities 3,476 8 4,729 2,886 14 4,196 Corporate debt securities 9 25 458 4 35 390 Municipal bonds — 3 42 — 4 50 U.S. government bonds 19 25 976 13 33 826 Other debt securities 3 7 231 1 13 172 Total NDTF Investments $ 3,507 $ 68 $ 6,505 $ 2,904 $ 99 $ 5,685
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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 38 $ 43 $ 163 $ 70 Realized losses 9 17 30 64 AFS: Realized gains 6 12 11 21 Realized losses 5 26 22 54
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, 2024 December 31, 2023 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 $ — $ — $ 82 $ — $ — $ 82 Equity securities 2,529 3 3,495 2,056 8 3,082 Corporate debt securities 11 4 263 8 8 242 Municipal bonds 5 7 300 6 12 297 U.S. government bonds 18 21 848 11 32 749 Other debt securities — — 17 — — 6 Total NDTF Investments $ 2,563 $ 35 $ 5,005 $ 2,081 $ 60 $ 4,458 Other Investments Cash and cash equivalents $ — $ — $ 21 $ — $ — $ 18 Municipal bonds — — 24 — 1 23 Total Other Investments $ — $ — $ 45 $ — $ 1 $ 41 Total Investments $ 2,563 $ 35 $ 5,050 $ 2,081 $ 61 $ 4,499
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, 2024 December 31, 2023 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 $ — $ — $ 82 $ — $ — $ 82 Equity securities 2,529 3 3,495 2,056 8 3,082 Corporate debt securities 11 4 263 8 8 242 Municipal bonds 5 7 300 6 12 297 U.S. government bonds 18 21 848 11 32 749 Other debt securities — — 17 — — 6 Total NDTF Investments $ 2,563 $ 35 $ 5,005 $ 2,081 $ 60 $ 4,458 Other Investments Cash and cash equivalents $ — $ — $ 21 $ — $ — $ 18 Municipal bonds — — 24 — 1 23 Total Other Investments $ — $ — $ 45 $ — $ 1 $ 41 Total Investments $ 2,563 $ 35 $ 5,050 $ 2,081 $ 61 $ 4,499
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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 23 $ 18 $ 93 $ 37 Realized losses 10 18 34 53 AFS: Realized gains 4 4 11 16 Realized losses 3 19 22 50
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, 2024 December 31, 2023 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 $ — $ — $ 61 $ — $ — $ 55 Equity securities 2,407 3 3,361 1,956 8 2,970 Corporate debt securities 10 4 252 7 8 229 Municipal bonds 5 7 300 6 12 297 U.S. government bonds 17 13 666 10 18 518 Other debt securities — — 16 — — 6 Total NDTF Investments $ 2,439 $ 27 $ 4,656 $ 1,979 $ 46 $ 4,075 Other Investments Cash and cash equivalents $ — $ — $ 16 $ — $ — $ 14 Total Other Investments $ — $ — $ 16 $ — $ — $ 14 Total Investments $ 2,439 $ 27 $ 4,672 $ 1,979 $ 46 $ 4,089
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, 2024 December 31, 2023 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 $ — $ — $ 61 $ — $ — $ 55 Equity securities 2,407 3 3,361 1,956 8 2,970 Corporate debt securities 10 4 252 7 8 229 Municipal bonds 5 7 300 6 12 297 U.S. government bonds 17 13 666 10 18 518 Other debt securities — — 16 — — 6 Total NDTF Investments $ 2,439 $ 27 $ 4,656 $ 1,979 $ 46 $ 4,075 Other Investments Cash and cash equivalents $ — $ — $ 16 $ — $ — $ 14 Total Other Investments $ — $ — $ 16 $ — $ — $ 14 Total Investments $ 2,439 $ 27 $ 4,672 $ 1,979 $ 46 $ 4,089
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, 2024, and 2023, were as follows. Three Months Ended Nine Months Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 FV-NI: Realized gains $ 23 $ 15 $ 93 $ 34 Realized losses 10 18 34 52 AFS: Realized gains 4 4 11 15 Realized losses 3 18 21 47
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, 2024 December 31, 2023 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 $ — $ — $ 21 $ — $ — $ 27 Equity securities 122 — 134 100 — 112 Corporate debt securities 1 — 11 1 — 13 U.S. government bonds 1 8 182 1 14 231 Other debt securities — — 1 — — — Total NDTF Investments (a) $ 124 $ 8 $ 349 $ 102 $ 14 $ 383 Other Investments Cash and cash equivalents $ — $ — $ 2 $ — $ — $ 3 Municipal bonds — — 24 — 1 23 Total Other Investments $ — $ — $ 26 $ — $ 1 $ 26 Total Investments $ 124 $ 8 $ 375 $ 102 $ 15 $ 409 (a) During the nine months ended September 30, 2024, and the year ended December 31, 2023, 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, 2024 December 31, 2023 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 $ — $ — $ 21 $ — $ — $ 27 Equity securities 122 — 134 100 — 112 Corporate debt securities 1 — 11 1 — 13 U.S. government bonds 1 8 182 1 14 231 Other debt securities — — 1 — — — Total NDTF Investments (a) $ 124 $ 8 $ 349 $ 102 $ 14 $ 383 Other Investments Cash and cash equivalents $ — $ — $ 2 $ — $ — $ 3 Municipal bonds — — 24 — 1 23 Total Other Investments $ — $ — $ 26 $ — $ 1 $ 26 Total Investments $ 124 $ 8 $ 375 $ 102 $ 15 $ 409 (a) During the nine months ended September 30, 2024, and the year ended December 31, 2023, 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, 2024 December 31, 2023 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 $ — $ — $ 2 $ — $ — $ 1 Equity securities 22 — 117 4 — 98 Corporate debt securities — — 7 — — 8 Municipal bonds 1 1 52 1 1 46 U.S. government bonds — — 7 — — 10 Total Investments $ 23 $ 1 $ 185 $ 5 $ 1 $ 163
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, 2024 December 31, 2023 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 $ — $ — $ 2 $ — $ — $ 1 Equity securities 22 — 117 4 — 98 Corporate debt securities — — 7 — — 8 Municipal bonds 1 1 52 1 1 46 U.S. government bonds — — 7 — — 10 Total Investments $ 23 $ 1 $ 185 $ 5 $ 1 $ 163

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 151 $ 151 $ — $ — $ — NDTF equity securities 8,224 8,195 — — 29 NDTF debt securities 3,135 1,012 2,123 — — Other equity securities 188 188 — — — Other debt securities 284 48 236 — — Other cash and cash equivalents 68 68 — — — Derivative assets 162 2 143 17 — Total assets 12,212 9,664 2,502 17 29 Derivative liabilities (561) (34) (527) — — Net assets $ 11,651 $ 9,630 $ 1,975 $ 17 $ 29 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 133 $ 133 $ — $ — $ — NDTF equity securities 7,278 7,241 — — 37 NDTF debt securities 2,732 829 1,903 — — Other equity securities 158 158 — — — Other debt securities 271 55 216 — — Other cash and cash equivalents 31 31 — — — Derivative assets 189 37 137 15 — Total assets 10,792 8,484 2,256 15 37 Derivative liabilities (729) (60) (669) — — Net assets $ 10,063 $ 8,424 $ 1,587 $ 15 $ 37
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) 2024 2023 2024 2023 Balance at beginning of period $ 35 $ 41 $ 15 $ 34 Purchases, sales, issuances and settlements: Purchases — 3 29 50 Settlements (13) (18) (36) (76) Total (losses) gains included on the Condensed Consolidated Balance Sheet (5) 4 9 22 Balance at end of period $ 17 $ 30 $ 17 $ 30
Quantitative Information Table - Level 3	The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. September 30, 2024 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 2 RTO auction pricing FTR price – per MWh $ — - $ 1.35 $ 0.56 Duke Energy Indiana FTRs 15 RTO auction pricing FTR price – per MWh (0.76) - 12.83 1.19 Duke Energy Total Level 3 derivatives $ 17 December 31, 2023 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 2 RTO auction pricing FTR price – per MWh $ 0.36 - $ 2.11 $ 0.71 Duke Energy Indiana FTRs 13 RTO auction pricing FTR price – per MWh (1.05) - 9.64 1.26 Duke Energy Total Level 3 derivatives $ 15
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. 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, 2024 December 31, 2023 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 80,121 $ 76,285 $ 75,252 $ 69,790 Duke Energy Carolinas 17,032 16,342 16,012 15,077 Progress Energy 24,214 23,422 23,759 22,553 Duke Energy Progress 12,323 11,430 11,714 10,595 Duke Energy Florida 10,248 10,124 10,401 10,123 Duke Energy Ohio 4,164 4,087 3,518 3,310 Duke Energy Indiana 4,801 4,605 4,502 4,230 Piedmont 4,003 3,754 3,668 3,336 (a) Book value of long-term debt inc lude s $1.0 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, 2024 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 69 $ 69 $ — $ — NDTF equity securities 4,729 4,700 — 29 NDTF debt securities 1,707 491 1,216 — Derivative assets 26 — 26 — Total assets 6,531 5,260 1,242 29 Derivative liabilities (186) — (186) — Net assets $ 6,345 $ 5,260 $ 1,056 $ 29 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 51 $ 51 $ — $ — NDTF equity securities 4,196 4,159 — 37 NDTF debt securities 1,438 375 1,063 — Derivative assets 35 — 35 — Total assets 5,720 4,585 1,098 37 Derivative liabilities (260) — (260) — Net assets $ 5,460 $ 4,585 $ 838 $ 37
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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 82 $ 82 $ — $ 82 $ 82 $ — NDTF equity securities 3,495 3,495 — 3,082 3,082 — NDTF debt securities 1,428 521 907 1,294 454 840 Other debt securities 24 — 24 23 — 23 Other cash and cash equivalents 21 21 — 18 18 — Derivative assets 33 — 33 34 — 34 Total assets 5,083 4,119 964 4,533 3,636 897 Derivative liabilities (165) — (165) (234) — (234) Net assets $ 4,918 $ 4,119 $ 799 $ 4,299 $ 3,636 $ 663
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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 61 $ 61 $ — $ 55 $ 55 $ — NDTF equity securities 3,361 3,361 — 2,970 2,970 — NDTF debt securities 1,234 375 859 1,050 266 784 Other cash and cash equivalents 16 16 — 14 14 — Derivative assets 33 — 33 32 — 32 Total assets 4,705 3,813 892 4,121 3,305 816 Derivative liabilities (140) — (140) (219) — (219) Net assets $ 4,565 $ 3,813 $ 752 $ 3,902 $ 3,305 $ 597
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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 21 $ 21 $ — $ 27 $ 27 $ — NDTF equity securities 134 134 — 112 112 — NDTF debt securities 194 146 48 244 188 56 Other debt securities 24 — 24 23 — 23 Other cash and cash equivalents 2 2 — 3 3 — Derivative assets — — — 2 — 2 Total assets 375 303 72 411 330 81 Derivative liabilities (26) — (26) (15) — (15) Net assets $ 349 $ 303 $ 46 $ 396 $ 330 $ 66
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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 117 $ 117 $ — $ — $ 98 $ 98 $ — $ — Other debt securities 66 — 66 — 64 — 64 — Other cash and cash equivalents 2 2 — — 1 1 — — Derivative assets 26 — 11 15 25 5 7 13 Total assets 211 119 77 15 188 104 71 13 Derivative liabilities (4) (4) — — (18) (18) — — Net assets $ 207 $ 115 $ 77 $ 15 $ 170 $ 86 $ 71 $ 13
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) 2024 2023 2024 2023 Balance at beginning of period $ 33 $ 37 $ 13 $ 29 Purchases, sales, issuances and settlements: Purchases — — 27 42 Settlements (13) (14) (33) (70) Total (losses) gains included on the Condensed Consolidated Balance Sheet (5) 4 8 26 Balance at end of period $ 15 $ 27 $ 15 $ 27
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, 2024 December 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ 2 $ 2 $ — $ 1 $ 1 $ — Derivative liabilities (124) — (124) (147) — (147) Net (liabilities) assets $ (122) $ 2 $ (124) $ (146) $ 1 $ (147)

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2024
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 (a) January 2025 April 2025 (b) Credit facility amount (a) $ 500 $ 400 (b) Amounts borrowed at September 30, 2024 — 500 400 — Amounts borrowed at December 31, 2023 312 500 400 325 Restricted Receivables at September 30, 2024 — 1,149 822 — Restricted Receivables at December 31, 2023 663 991 833 532 (a) In March 2024, Duke Energy repaid all outstanding CRC borrowings and terminated the related $350 million CRC credit facility. (b) In April 2024, Duke Energy Florida repaid all outstanding DEFR borrowings and terminated the related $325 million DEFR credit facility.
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, 2024 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ — $ — Investments in equity method unconsolidated affiliates 55 — — Other noncurrent assets 30 — — Total assets $ 85 $ — $ — Other current liabilities 4 — — Other noncurrent liabilities 1 — — Total liabilities $ 5 $ — $ — Net assets $ 80 $ — $ — December 31, 2023 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 150 $ 208 Investments in equity method unconsolidated affiliates 67 — — Other noncurrent assets 43 — — Total assets $ 110 $ 150 $ 208 Other current liabilities 4 — — Other noncurrent liabilities 5 — — Total liabilities $ 9 $ — $ — Net assets $ 101 $ 150 $ 208
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, 2024 December 31, 2023 Regulatory Assets: Current 60 59 Current Assets: Other 18 37 Other Noncurrent Assets: Regulatory assets 754 803 Current Liabilities: Other 2 8 Current maturities of long-term debt 59 59 Long-Term Debt 772 831
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, 2024 December 31, 2023 Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Carolinas Progress (in millions) DECNCSF DEPNCSF DEPSCSF DECNCSF DEPNCSF Regulatory Assets: Current $ 12 $ 39 $ 8 $ 12 $ 39 Current Assets: Other 6 19 8 9 31 Other Noncurrent Assets: Regulatory assets 188 617 157 196 643 Other Noncurrent Assets: Other 1 4 1 1 2 Current Liabilities: Other 1 4 4 10 34 Current Maturities of Long-Term Debt 10 34 9 3 8 Long-Term Debt 198 646 163 208 680
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. See discussion under Consolidated VIEs for additional information related to CRC's termination in March 2024. Duke Energy Ohio Duke Energy Indiana (in millions) September 30, 2024 December 31, 2023 September 30, 2024 December 31, 2023 Receivables sold $ — $ 361 $ — $ 351 Less: Retained interests — 150 — 208 Net receivables sold $ — $ 211 $ — $ 143 The following table shows sales and cash flows related to receivables sold and reflects CRC activity prior to its termination in March 2024. Duke Energy Ohio Duke Energy Indiana Nine Months Ended Nine Months Ended September 30, September 30, (in millions) 2024 2023 2024 2023 Sales Receivables sold $ 474 $ 1,973 $ 473 $ 2,646 Loss recognized on sale 7 25 6 15 Cash flows Cash proceeds from receivables sold $ 478 $ 2,024 $ 523 $ 2,465 Collection fees received — 1 — 1 Return received on retained interests 4 15 4 9
DEF ProCo | VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the impact of this VIE on Duke Energy Florida's Consolidated Balance Sheets. (in millions) September 30, 2024 December 31, 2023 Inventory $ 477 $ 462 Accounts Payable 199 188

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2024
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) 2024 2025 2026 2027 2028 Thereafter Total Duke Energy Carolinas $ 3 $ 12 $ 12 $ 12 $ 12 $ — $ 51 Progress Energy 18 30 7 7 7 29 98 Duke Energy Progress 2 — — — — — 2 Duke Energy Florida 16 30 7 7 7 29 96 Duke Energy Indiana 4 17 17 15 5 — 58 Remaining Performance Obligations (in millions) 2024 2025 2026 2027 2028 Thereafter Total Piedmont $ 16 $ 60 $ 51 $ 49 $ 46 $ 195 $ 417
Disaggregation of Revenue	Disaggregated revenues are presented as follows: Three Months Ended September 30, 2024 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 $ 3,738 $ 1,173 $ 1,973 $ 811 $ 1,162 $ 275 $ 316 $ — General 2,287 859 1,035 485 550 152 243 — Industrial 924 416 275 196 79 39 193 — Wholesale 620 158 394 350 44 15 53 — Other revenues 237 71 166 88 78 24 23 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 7,806 $ 2,677 $ 3,843 $ 1,930 $ 1,913 $ 505 $ 828 $ — Gas Utilities and Infrastructure Residential $ 157 $ — $ — $ — $ — $ 74 $ — $ 83 Commercial 91 — — — — 23 — 68 Industrial 36 — — — — 6 — 30 Power Generation — — — — — — — 8 Other revenues 25 — — — — 5 — 20 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 309 $ — $ — $ — $ — $ 108 $ — $ 209 Other Revenue from contracts with customers $ 12 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 8,127 $ 2,677 $ 3,843 $ 1,930 $ 1,913 $ 613 $ 828 $ 209 Other revenue sources (a) $ 27 $ 30 $ 17 $ (16) $ 27 $ (8) $ 8 $ 10 Total revenues $ 8,154 $ 2,707 $ 3,860 $ 1,914 $ 1,940 $ 605 $ 836 $ 219 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 (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, 2024 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 $ 9,945 $ 3,190 $ 5,115 $ 2,214 $ 2,901 $ 768 $ 872 $ — General 6,234 2,331 2,834 1,334 1,500 448 624 — Industrial 2,615 1,130 808 556 252 110 566 — Wholesale 1,698 423 1,086 974 112 39 150 — Other revenues 783 269 502 257 245 64 96 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 21,275 $ 7,343 $ 10,345 $ 5,335 $ 5,010 $ 1,429 $ 2,308 $ — Gas Utilities and Infrastructure Residential $ 859 $ — $ — $ — $ — $ 307 $ — $ 552 Commercial 434 — — — — 111 — 323 Industrial 115 — — — — 23 — 92 Power Generation — — — — — — — 24 Other revenues 97 — — — — 19 — 78 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,505 $ — $ — $ — $ — $ 460 $ — $ 1,069 Other Revenue from contracts with customers $ 30 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 22,810 $ 7,343 $ 10,345 $ 5,335 $ 5,010 $ 1,889 $ 2,308 $ 1,069 Other revenue sources (a) $ 187 $ 68 $ 100 $ 3 $ 82 $ 2 $ 34 $ 70 Total revenues $ 22,997 $ 7,411 $ 10,445 $ 5,338 $ 5,092 $ 1,891 $ 2,342 $ 1,139 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.
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, 2023 and 2024 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, 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 Balance at June 30, 2024 $ 207 $ 65 $ 73 $ 47 $ 26 $ 42 $ 16 $ 11 Write-Offs (29) (13) (16) (10) (6) — — — Credit Loss Expense 34 15 18 7 11 — — 1 Other Adjustments 6 3 4 4 — (1) — — Balance at September 30, 2024 $ 218 $ 70 $ 79 $ 48 $ 31 $ 41 $ 16 $ 12 Nine Months Ended September 30, 2023 and 2024 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 $ 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 Balance at December 31, 2023 $ 205 $ 56 $ 74 $ 44 $ 31 $ 9 $ 5 $ 11 Write-Offs (97) (41) (49) (29) (20) — — (4) Credit Loss Expense 79 32 38 17 21 2 2 5 Other Adjustments 31 23 16 16 (1) 30 9 — Balance at September 30, 2024 $ 218 $ 70 $ 79 $ 48 $ 31 $ 41 $ 16 $ 12

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2024
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) 2024 2023 2024 2023 Net Income available to Duke Energy common stockholders $ 1,226 $ 1,213 $ 3,211 $ 1,744 Less: Income (Loss) from discontinued operations attributable to Duke Energy common stockholders 22 (190) 9 (1,283) Accumulated preferred stock dividends adjustment 14 12 14 12 Less: Impact of participating securities 2 2 4 4 Income from continuing operations available to Duke Energy common stockholders $ 1,216 $ 1,413 $ 3,212 $ 3,035 Income (Loss) from discontinued operations, net of tax $ 25 $ (152) $ 12 $ (1,316) Add: (Income) Loss attributable to NCI (3) (38) (3) 33 Income (Loss) from discontinued operations attributable to Duke Energy common stockholders $ 22 $ (190) $ 9 $ (1,283) Weighted average common shares outstanding – basic 772 771 772 771 Equity forwards 1 — — — Weighted average common shares outstanding – diluted 773 771 772 771 EPS from continuing operations available to Duke Energy common stockholders Basic and diluted (a) $ 1.57 $ 1.83 $ 4.16 $ 3.94 Income (Loss) Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and diluted (a) $ 0.03 $ (0.24) $ 0.01 $ (1.67) Potentially dilutive items excluded from the calculation (b) 2 2 2 2 Dividends declared per common share $ 1.045 $ 1.025 $ 3.095 $ 3.035 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 were payable semiannually in arrears on the 16th day of March and September. The preferred stock was redeemed on September 16, 2024.
Equity Issuances Pursuant to Forward Contracts	The following table shows ATM equity issuances pursuant to forward contracts executed during the nine months ended September 30, 2024. Tranche Shares Priced Initial Forward Price 1 802,371 $ 92.77 2 729,674 $ 101.10 3 737,280 $ 100.99 4 662,266 $ 111.45 Total 2,931,591

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Plan Contributions	The following table includes information related to the Duke Energy Registrants' contributions to its qualified defined benefit pension plans. Nine Months Ended September 30, 2024 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Contributions made: 2024 $ 100 $ 26 $ 23 $ 14 $ 9 $ 5 $ 8 $ 3 2023 $ 100 $ 26 $ 22 $ 13 $ 9 $ 5 $ 8 $ 3
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, 2024 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 $ 8 $ 5 $ 3 $ 1 $ 1 $ 1 Interest cost on projected benefit obligation 82 19 26 12 14 5 6 2 Expected return on plan assets (154) (41) (55) (25) (29) (6) (10) (5) Amortization of actuarial loss 9 2 2 1 1 — 1 1 Amortization of prior service credit (3) — — — — — — (1) Amortization of settlement charges 17 5 7 6 — 2 — 2 Net periodic pension costs $ (21) $ (6) $ (12) $ (1) $ (11) $ 2 $ (2) $ — 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) Nine Months Ended September 30, 2024 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 85 $ 28 $ 24 $ 15 $ 10 $ 2 $ 4 $ 3 Interest cost on projected benefit obligation 247 59 78 36 42 13 19 7 Expected return on plan assets (462) (122) (163) (75) (87) (19) (31) (15) Amortization of actuarial loss 25 6 7 4 3 1 3 2 Amortization of prior service credit (10) — — — — — (1) (5) Amortization of settlement charges 26 9 9 8 1 2 1 4 Net periodic pension costs $ (89) $ (20) $ (45) $ (12) $ (31) $ (1) $ (5) $ (4) 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)

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 2023 2024 2023 Duke Energy 11.2 % 2.8 % 12.5 % 9.0 % Duke Energy Carolinas 7.7 % 4.9 % 9.8 % 8.0 % Progress Energy 16.1 % 15.7 % 16.4 % 16.2 % Duke Energy Progress 12.9 % 11.8 % 14.1 % 13.0 % Duke Energy Florida 20.5 % 20.8 % 19.9 % 20.3 % Duke Energy Ohio 11.9 % 14.9 % 15.8 % 15.8 % Duke Energy Indiana 15.7 % 18.5 % 16.3 % 17.8 % Piedmont 29.4 % 26.3 % 18.4 % 17.2 %

Organization and Basis of Pre_4

Organization and Basis of Presentation (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 376	$ 253
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	447	357	$ 574	$ 603
Duke Energy (Parent)
Current Assets
Cash and cash equivalents	376	253
Other	51	76
Other Noncurrent Assets
Other	18	16
Total cash, cash equivalents and restricted cash	445	345
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	13	9
Other	6	9
Other Noncurrent Assets
Other	1	1
Total cash, cash equivalents and restricted cash	20	19	24	53
Progress Energy
Current Assets
Cash and cash equivalents	82	59
Other	45	67
Other Noncurrent Assets
Other	11	9
Total cash, cash equivalents and restricted cash	138	135	133	184
Duke Energy Progress
Current Assets
Cash and cash equivalents	46	18
Other	27	31
Other Noncurrent Assets
Other	5	2
Total cash, cash equivalents and restricted cash	78	51	46	79
Duke Energy Florida
Current Assets
Cash and cash equivalents	16	24
Other	18	36
Other Noncurrent Assets
Other	7	7
Total cash, cash equivalents and restricted cash	$ 41	$ 67	$ 64	$ 86

Organization and Basis of Pre_5

Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Public Utilities, Inventory [Line Items]
Total inventory	$ 4,338	$ 4,292
Duke Energy (Parent)
Public Utilities, Inventory [Line Items]
Materials and supplies	3,229	3,086
Coal	810	842
Natural gas, oil and other fuel	299	364
Total inventory	4,338	4,292
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Materials and supplies	1,076	1,075
Coal	360	364
Natural gas, oil and other fuel	46	45
Total inventory	1,482	1,484
Progress Energy
Public Utilities, Inventory [Line Items]
Materials and supplies	1,580	1,465
Coal	232	231
Natural gas, oil and other fuel	194	205
Total inventory	2,006	1,901
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Materials and supplies	1,052	963
Coal	161	154
Natural gas, oil and other fuel	107	110
Total inventory	1,320	1,227
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Materials and supplies	528	502
Coal	71	77
Natural gas, oil and other fuel	87	95
Total inventory	686	674
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Materials and supplies	141	139
Coal	21	28
Natural gas, oil and other fuel	11	12
Total inventory	173	179
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Materials and supplies	381	361
Coal	197	219
Natural gas, oil and other fuel	2	2
Total inventory	580	582
Piedmont
Public Utilities, Inventory [Line Items]
Materials and supplies	12	12
Coal	0	0
Natural gas, oil and other fuel	46	100
Total inventory	$ 58	$ 112

Organization and Basis of Pre_6

Organization and Basis of Presentation (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	May 30, 2022
Regulatory Asset [Line Items]
Other	$ 3,732	$ 3,964
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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Duke Energy (Parent)
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	$ 28	$ 40	$ 50	$ 87
Invoices confirmed during the period	26	47	146	161
Confirmed invoices paid during the period	(28)	(18)	(170)	(179)
Confirmed obligations at end of period	26	69	26	69
Duke Energy Carolinas
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	0	5	0	6
Invoices confirmed during the period	0	2	0	22
Confirmed invoices paid during the period	0	(4)	0	(25)
Confirmed obligations at end of period	0	3	0	3
Progress Energy
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	0	14	3	19
Invoices confirmed during the period	1	11	2	53
Confirmed invoices paid during the period	0	(8)	(4)	(55)
Confirmed obligations at end of period	1	17	1	17
Duke Energy Progress
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	0	12	0	8
Invoices confirmed during the period	0	2	0	25
Confirmed invoices paid during the period	0	(3)	0	(22)
Confirmed obligations at end of period	0	11	0	11
Duke Energy Florida
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	0	2	3	11
Invoices confirmed during the period	1	9	2	28
Confirmed invoices paid during the period	0	(5)	(4)	(33)
Confirmed obligations at end of period	1	6	1	6
Duke Energy Ohio
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	0	2	0	5
Invoices confirmed during the period	0	4	0	7
Confirmed invoices paid during the period	0	0	0	(6)
Confirmed obligations at end of period	0	6	0	6
Duke Energy Indiana
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	0	0	0	0
Invoices confirmed during the period	0	0	0	0
Confirmed invoices paid during the period	0	0	0	0
Confirmed obligations at end of period	0	0	0	0
Piedmont
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	28	19	47	57
Invoices confirmed during the period	25	30	144	79
Confirmed invoices paid during the period	(28)	(6)	(166)	(93)
Confirmed obligations at end of period	$ 25	$ 43	$ 25	$ 43

Dispositions (Narrative) (Detai

Dispositions (Narrative) (Details) - Commercial Renewables - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Oct. 25, 2023
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received			$ 1,100
Consideration period			18 months
Discontinued Operations, Disposed of by Sale | Receivables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received	$ 545
Discontinued Operations, Disposed of by Sale | Noncurrent assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received		$ 531
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling interest balance	17	66
Pre-tax impairment	$ 131	$ 278

Dispositions (Balance Sheet) (D

Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets Held for Sale
Total current assets held for sale	$ 4	$ 14
Noncurrent Assets Held for Sale
Total other noncurrent assets held for sale	81	197
Current Liabilities Associated with Assets Held for Sale
Total current liabilities associated with assets held for sale	77	122
Noncurrent Liabilities Associated with Assets Held for Sale
Total other noncurrent liabilities associated with assets held for sale	85	157
Discontinued Operations, Held-for-sale | Commercial Renewables
Current Assets Held for Sale
Other	4	14
Total current assets held for sale	4	14
Noncurrent Assets Held for Sale
Cost	101	247
Accumulated depreciation and amortization	(24)	(57)
Net property, plant and equipment	77	190
Operating lease right-of-use assets, net	4	4
Other	0	3
Total other noncurrent assets held for sale	4	7
Total Assets Held for Sale	85	211
Current Liabilities Associated with Assets Held for Sale
Accounts payable	19	9
Taxes accrued	1	3
Current maturities of long-term debt	43	5
Unrealized losses on commodity hedges	11	68
Other	3	37
Total current liabilities associated with assets held for sale	77	122
Noncurrent Liabilities Associated with Assets Held for Sale
Long-Term debt	0	39
Operating lease liabilities	5	5
Asset retirement obligations	5	8
Unrealized losses on commodity hedges	61	94
Other	14	11
Total other noncurrent liabilities associated with assets held for sale	85	157
Total Liabilities Associated with Assets Held for Sale	$ 162	$ 279

Dispositions (Income Statement)

Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from discontinued operations	$ 25	$ (152)	$ 12	$ (1,316)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(3)	(38)	(3)	33
Net income (loss) from discontinued operations attributable to Duke Energy Corporation	22	(190)	9	(1,283)
Discontinued Operations, Held-for-sale | Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	2	103	9	293
Operation, maintenance and other	3	93	19	270
Property and other taxes	0	8	1	27
Other income and expenses, net	0	(2)	0	(9)
Interest expense	1	10	3	53
Loss on disposal	17	169	22	1,603
Loss before income taxes	(19)	(179)	(36)	(1,669)
Income tax benefit	(44)	(27)	(48)	(353)
Income (Loss) from discontinued operations	25	(152)	12	(1,316)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(3)	(38)	(3)	33
Net income (loss) from discontinued operations attributable to Duke Energy Corporation	$ 22	$ (190)	$ 9	$ (1,283)

Dispositions (Cash Flow Stateme

Dispositions (Cash Flow Statement) (Details) - Commercial Renewables - Discontinued Operations, Held-for-sale - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating activities	$ 6	$ 545
Investing activities	$ (13)	$ (597)

Business Segments (Narrative) (

Business Segments (Narrative) (Details)	9 Months Ended
	Sep. 30, 2024 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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues	$ 8,154	$ 7,994	$ 22,997	$ 21,848
Income From Continuing Operations	1,204	1,403	3,202	3,027
Add: Noncontrolling interests	(34)	(69)	(68)	(42)
Add: Preferred dividends	39	39	92	92
Less: Preferred Redemption Costs	16	0	16	0
Loss From Discontinued Operations, net of tax	22	(190)	9	(1,283)
Net Income	1,315	1,321	3,387	1,878
Segment assets	183,566		183,566		$ 176,893
Impairment of assets and other charges	(5)	88	39	96
Operation, maintenance and other	1,409	1,428	4,108	4,113
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	605	577	1,891	1,875
Income From Continuing Operations	52	80	223	251
Net Income			223	251
Segment assets	12,611		12,611		$ 12,216
Operation, maintenance and other	131	114	378	358
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	8,142	7,986	22,967	21,824
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,833	7,695	21,420	20,308
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	309	291	1,547	1,516
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	8,184	8,028	23,090	21,946
Income From Continuing Operations	1,426	1,462	3,827	3,415
Segment assets	179,323		179,323
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	605	577	1,891	1,875
Income From Continuing Operations	53	82	227	255
Segment assets	12,552		12,552
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,852	7,715	21,475	20,363
Income From Continuing Operations	1,451	1,447	3,562	3,088
Segment assets	161,471		161,471
Operating Segments | Electric Utilities and Infrastructure | Regulated and Unregulated Operating Revenue
Segment Reporting Information [Line Items]
Income From Continuing Operations	17		17
Operating Segments | Electric Utilities and Infrastructure | Impairment Of Assets And Other Charges
Segment Reporting Information [Line Items]
Income From Continuing Operations		95	42	95
Operating Segments | Electric Utilities and Infrastructure | Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses
Segment Reporting Information [Line Items]
Income From Continuing Operations		16	2	16
Operating Segments | Electric Utilities and Infrastructure | Nonoperating Income (Expense)
Segment Reporting Information [Line Items]
Income From Continuing Operations			(11)
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	497	472	1,431	1,411
Income From Continuing Operations	57	65	181	168
Segment assets	8,096		8,096
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	332	313	1,615	1,583
Income From Continuing Operations	(25)	15	265	327
Segment assets	17,852		17,852
Operating Segments | Gas Utilities and Infrastructure | Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses
Segment Reporting Information [Line Items]
Income From Continuing Operations	1		1
Operating Segments | Gas Utilities and Infrastructure | Nonoperating Income (Expense)
Segment Reporting Information [Line Items]
Income From Continuing Operations	3		3
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	108	105	460	464
Income From Continuing Operations	(4)	17	46	87
Segment assets	4,456		4,456
Operating Segments | Other | Preferred Stock Redemption Premium
Segment Reporting Information [Line Items]
Income From Continuing Operations	16		16
Other | Other
Segment Reporting Information [Line Items]
Operating Revenues	12	8	30	24
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Income From Continuing Operations	(1)	(2)	(4)	(4)
Segment assets	13		13
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	42	33	120	98
Income From Continuing Operations	(222)	(59)	(625)	(388)
Segment assets	4,243		4,243
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(72)	(67)	(213)	(196)
Income From Continuing Operations	0	0
Segment assets	0		0
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	0
Income From Continuing Operations	0
Segment assets	46		46
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	42	42	123	122
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	19	20	55	55
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	22	68	67
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 30	$ 25	$ 90	$ 74

Regulatory Matters (Regulatory

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) customers in Thousands, $ in Millions					3 Months Ended	9 Months Ended
	Sep. 27, 2021 contention	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Sep. 30, 2024 USD ($) customers	Sep. 30, 2024 USD ($) customers	Aug. 31, 2024 customers	Dec. 31, 2023 USD ($)
Public Utilities, General Disclosures [Line Items]
Regulatory assets					$ 13,778	$ 13,778		$ 13,618
Hurricanes Helene, Debby and Milton | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						2,400
Hurricanes Helene, Debby and Milton | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						$ 2,900
Hurricane Helene
Public Utilities, General Disclosures [Line Items]
Number of impacted customers | customers					3,500	3,500
Capital investments					$ 112
Storm restoration costs incurred						$ 582
Regulatory assets					451	451
Hurricane Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						1,500
Hurricane Helene | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						1,900
Hurricane Debby
Public Utilities, General Disclosures [Line Items]
Number of impacted customers | customers							700
Capital investments					11
Storm restoration costs incurred						150
Regulatory assets					90	90
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Regulatory assets					3,867	3,867		3,916
Duke Energy Carolinas | Hurricanes Helene, Debby and Milton | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						950
Duke Energy Carolinas | Hurricanes Helene, Debby and Milton | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						1,150
Duke Energy Carolinas | Hurricane Helene
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred						261
Regulatory assets					177	177
Duke Energy Carolinas | Hurricane Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						900
Duke Energy Carolinas | Hurricane Helene | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						1,100
Duke Energy Carolinas | Hurricane Debby
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred						45
Regulatory assets					23	23
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets					4,489	4,489		4,546
Duke Energy Progress | Hurricanes Helene, Debby and Milton | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						350
Duke Energy Progress | Hurricanes Helene, Debby and Milton | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						450
Duke Energy Progress | Hurricane Helene
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred						51
Regulatory assets					34	34
Duke Energy Progress | Hurricane Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						300
Duke Energy Progress | Hurricane Helene | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						400
Duke Energy Progress | Hurricane Debby
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred						45
Regulatory assets					13	13
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Regulatory assets					2,071	2,071		$ 1,883
Duke Energy Florida | Hurricanes Helene, Debby and Milton | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						1,100
Duke Energy Florida | Hurricanes Helene, Debby and Milton | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						1,300
Duke Energy Florida | Hurricane Helene
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred						251
Regulatory assets					236	236
Duke Energy Florida | Hurricane Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						300
Duke Energy Florida | Hurricane Helene | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs						400
Duke Energy Florida | Hurricane Debby
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred						60
Regulatory assets					$ 54	$ 54
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)						20 years
Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Comment period (in days)		60 days
Number of contentions | contention	3
Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station | Nuclear Regulatory Commission | 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 - Total Stor

Regulatory Matters - Total Storm Restoration Costs Across Subsidiary Registrants (Details) - Hurricanes Helene, Debby and Milton $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	$ 2,400
Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	2,900
Duke Energy Carolinas | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	950
Duke Energy Carolinas | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	1,150
Duke Energy Progress | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	350
Duke Energy Progress | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	450
Duke Energy Florida | Minimum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	1,100
Duke Energy Florida | Maximum
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	$ 1,300

Regulatory Matters (Regulator_2

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) $ in Millions								3 Months Ended		4 Months Ended	9 Months Ended		12 Months Ended
	Jul. 03, 2024 USD ($)	May 17, 2024 USD ($)	Mar. 14, 2024 USD ($) numberOfCombustionTurbines MW	Jan. 04, 2024	Dec. 15, 2023	Aug. 22, 2023 USD ($)	Jan. 19, 2023	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2026 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 14, 2027 USD ($)	Dec. 14, 2026 USD ($)	Aug. 31, 2026 USD ($)	Dec. 14, 2025 USD ($)	Aug. 31, 2025 USD ($)	Dec. 14, 2024 USD ($)	Aug. 31, 2024 USD ($)
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges								$ (5)	$ 88		$ 39	$ 96
Operation, maintenance and other								1,409	1,428		4,108	4,113
Interest Expense								(872)	(774)		(2,513)	(2,221)
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges								(2)	64		32	70
Operation, maintenance and other								463	424		1,358	1,285
Interest Expense								(189)	(172)		(537)	(504)
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)							3 years
Requested rate increase (decrease), amount																			$ 501
Settlement rate, amount						$ 19,500
Settlement rate, period (in years)						3 years
Impairment of assets and other charges									59			59
Operation, maintenance and other									$ 8			$ 8
Approved return on equity percentage (as a percent)					10.10%
Public utilities, approved equity capital structure, percentage (as a percent)					53%
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%
Approved rate increase (decrease), amount													$ 768	$ 158		$ 174		$ 436
2023 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Settlement rate, amount						$ 4,600
2024 South Carolina Rate Case | PSCSC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)				2 years
Settlement rate, amount	$ 7,400
Impairment of assets and other charges								33			33
Operation, maintenance and other								$ 2			2
Interest Expense											$ 11
Approved rate increase (decrease), amount	$ 150	$ 240
Approved return on equity percentage (as a percent)		9.94%
Public utilities, approved equity capital structure, percentage (as a percent)		51.21%
EDIT		$ 84
Marshall Combustion Turbines CPCN Proceedings | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount			$ 104
Requested rate increase (decrease) (as a percent)			2.20%
New combustion turbines (in megawatts) | MW			850
Hydrogen-capable CTs | numberOfCombustionTurbines			2

Regulatory Matters (Regulator_3

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

3 Months Ended

7 Months Ended

9 Months Ended

11 Months Ended

12 Months Ended

Mar. 28, 2024 USD ($) MW

Aug. 18, 2023 USD ($)

Apr. 26, 2023

Sep. 30, 2024 USD ($)

Sep. 30, 2023 USD ($)

Dec. 31, 2025 USD ($)

Sep. 30, 2024 USD ($)

Sep. 30, 2023 USD ($)

Apr. 30, 2024 USD ($)

Aug. 17, 2027 USD ($)

Aug. 17, 2026 USD ($)

May 31, 2026 USD ($)

Aug. 17, 2025 USD ($)

May 31, 2025 USD ($)

Aug. 17, 2024 USD ($)

Jan. 01, 2026 MW

Apr. 25, 2024 USD ($)

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

$ (5,000,000)

$ 88,000,000

$ 39,000,000

$ 96,000,000

Operation, maintenance and other

1,409,000,000

1,428,000,000

4,108,000,000

4,113,000,000

Debt issuances

7,740,000,000

7,740,000,000

Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Impairment of assets and other charges

(3,000,000)

24,000,000

6,000,000

31,000,000

Operation, maintenance and other

376,000,000

345,000,000

1,077,000,000

1,051,000,000

Debt issuances

$ 677,000,000

$ 677,000,000

Duke Energy Progress | Storm Recovery Bonds

Public Utilities, General Disclosures [Line Items]

Debt issuances

$ 177,000,000

2022 North Carolina Rate Case | NCUC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Proposed rate period (in years)

3 years

Requested rate increase (decrease), amount

$ 326,000,000

Settlement rate, amount

$ 12,200,000,000

Settlement rate, period (in years)

3 years

Approved return on equity percentage (as a percent)

9.80%

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

53%

Impairment of assets and other charges

28,000,000

28,000,000

Operation, maintenance and other

$ 8,000,000

$ 8,000,000

Approved rate increase (decrease), amount

$ 233,000,000

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

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease), amount

$ 615,000,000

$ 138,000,000

$ 151,000,000

Approved rate increase (decrease), amount

$ 494,000,000

$ 135,000,000

$ 126,000,000

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

Public Utilities, General Disclosures [Line Items]

Settlement rate, amount

$ 3,500,000,000

Person County Cycle CPCN Proceeding | NCUC | Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease), amount

$ 98,000,000

Generation capacity (MW) | MW

1,360

Requested rate increase (decrease) (as a percent)

2.60%

Person County Cycle CPCN Proceeding | NCUC | NCEMC | Forecast

Public Utilities, General Disclosures [Line Items]

Generation capacity (MW) | MW

225

Person County Cycle CPCN Proceeding | NCEMC | Duke Energy Progress | Forecast

Public Utilities, General Disclosures [Line Items]

Generation capacity (MW) | MW

1,135

Regulatory Matters (Regulator_4

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Florida) (Details) customer in Thousands, outage in Millions, customers in Millions

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

Sep. 23, 2024 USD ($)

Jul. 15, 2024 solar_projects

Oct. 16, 2023 USD ($)

Jan. 23, 2023 USD ($)

Oct. 17, 2022 USD ($)

Oct. 04, 2022 USD ($)

Jun. 15, 2022 USD ($)

Jan. 14, 2021 USD ($)

Jul. 01, 2020 USD ($) plant MW

Oct. 31, 2024 USD ($) customers

Mar. 31, 2028 USD ($)

Sep. 30, 2024 USD ($)

Sep. 30, 2023 USD ($)

Sep. 30, 2024 USD ($)

Sep. 30, 2023 USD ($)

Dec. 31, 2026 USD ($)

Dec. 31, 2025 USD ($)

Dec. 31, 2024 USD ($)

Dec. 31, 2023 USD ($)

Dec. 31, 2022 USD ($)

Sep. 29, 2023 USD ($)

Aug. 30, 2023 customer

Jun. 30, 2023 USD ($)

Sep. 28, 2022 outage

Sep. 27, 2022 USD ($)

Apr. 11, 2022 USD ($)

Duke Energy Florida

Public Utilities, General Disclosures [Line Items]

Storm reserves

$ 100,000,000

$ 100,000,000

Duke Energy Florida | Hurricane Milton | Subsequent event

Public Utilities, General Disclosures [Line Items]

Number of impacted customers | customers

1

Duke Energy Florida | Solar Project

Public Utilities, General Disclosures [Line Items]

Estimated cost of facilities

$ 1,000,000,000

Duke Energy Florida | Minimum | Hurricane Milton | Subsequent event

Public Utilities, General Disclosures [Line Items]

Total storm restoration costs

$ 700,000,000

Duke Energy Florida | Maximum | Hurricane Milton | Subsequent event

Public Utilities, General Disclosures [Line Items]

Total storm restoration costs

$ 850,000,000

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

$ 49,000,000

$ 67,000,000

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

53%

Public utilities, basis points, increase, percentage

0.25%

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

$ 154,000,000

$ 173,000,000

165,000,000

165,000,000

Earnings recognized during period

$ 8,000,000

$ 31,000,000

$ 24,000,000

$ 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

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

$ 8,000,000

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

Storm reserves

$ 132,000,000

$ 107,000,000

Interim recovery payments

$ 442,000,000

Hurricane Idalia | FPSC | Duke Energy Florida | Hurricane Ian

Public Utilities, General Disclosures [Line Items]

Interim recovery payments

$ 74,000,000

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

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]

Interim recovery payments

$ 98,000,000

$ 166,000,000

Number of impacted customers | customer

200

2024 Florida Rate Case | FPSC | Duke Energy Florida

Public Utilities, General Disclosures [Line Items]

Number of solar plants | solar_projects

12

2024 Florida Rate Case | FPSC | Duke Energy Florida | Minimum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.30%

2024 Florida Rate Case | FPSC | Duke Energy Florida | Maximum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

11.30%

2024 Florida Rate Case | FPSC | Duke Energy Florida | Weighted Average

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.30%

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

53%

2024 Florida Rate Case | FPSC | Duke Energy Florida | Forecast

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease), amount

$ 59,000,000

$ 203,000,000

2024 Florida Rate Case, Solar Facilities | FPSC | Duke Energy Florida | Forecast

Public Utilities, General Disclosures [Line Items]

Requested rate increase (decrease), amount

$ 58,000,000

$ 71,000,000

$ 12,000,000

Regulatory Matters (Regulator_5

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Ohio) (Details) - Duke Energy Ohio - USD ($) $ in Millions	Apr. 01, 2024	Oct. 12, 2023	Apr. 28, 2023	Dec. 01, 2022	Sep. 19, 2022	Jul. 14, 2022	Oct. 01, 2021
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%
Equity ratio (as a percent)					50.50%
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%
Duke Energy Ohio Gas Base Rate Case | PUCO | Maximum
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)			52.32%
Duke Energy Kentucky Electric Base Rate Case | KPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 75
Approved rate increase (decrease), amount		$ 48
Duke Energy Kentucky Electric Base Rate Case | KPSC | Maximum
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)		52.145%
Duke Energy Kentucky Electric Base Rate Case, Electric Riders | KPSC
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
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		9.75%
Duke Energy Ohio Energy Security Plan | PUCO
Public Utilities, General Disclosures [Line Items]
Settlement rate, period (in years)	3 years

Regulatory Matters (Regulator_6

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Indiana) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 04, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2026	Dec. 31, 2025	Sep. 20, 2023	Jun. 15, 2022
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges		$ (5)	$ 88	$ 39	$ 96
Operating Revenues		8,154	7,994	22,997	21,848
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Operating Revenues		$ 836	$ 851	$ 2,342	$ 2,606
Indiana Coal Ash Recovery | IURC | Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
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
2024 Indiana Rate Case | IURC | Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Future investment in infrastructure	$ 1,600
Requested rate increase (decrease), amount	$ 492
Requested rate increase, percentage, net of tax	16.20%
Requested return on equity (as a percent)	10.50%
Equity ratio (as a percent)	53%
2024 Indiana Rate Case | IURC | Duke Energy Indiana | Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase, percentage, net of tax						4.50%	11.70%

Regulatory Matters (Regulator_7

Regulatory Matters (Regulatory Matters Narrative - Piedmont) (Details) - Piedmont - 2024 North Carolina Rate Case - NCUC $ in Millions	Sep. 13, 2024 USD ($)
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), year one	$ 88
Approved rate increase (decrease), after the first year	$ 10
Requested return on equity (as a percent)	9.80%
Equity ratio (as a percent)	52.30%

Commitments and Contingencies_2

Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 80	$ 88
Duke Energy Carolinas
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	25	23
Progress Energy
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	19	19
Duke Energy Progress
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	9	9
Duke Energy Florida
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	10	10
Duke Energy Ohio
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	28	36
Duke Energy Indiana
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	2	2
Piedmont
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 7	$ 7

Commitments and Contingencies_3

Commitments and Contingencies (Narrative) (Details) $ in Millions	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	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 | Asbestos-related Injuries and Damages Claims
Loss Contingencies [Line Items]
Asbestos-related injuries and damages reserves	$ 402	$ 423
Probable insurance recoveries	539	572
Duke Energy and Duke Energy Carolinas | ASU 2016-13
Loss Contingencies [Line Items]
Reserve for credit losses for insurance receivables	$ 9	$ 9

Debt and Credit Facilities (Sum

Debt and Credit Facilities (Summary of Debt Issuances) (Details) € in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Apr. 30, 2024 USD ($)	Apr. 30, 2024 EUR (€)
Debt Instrument [Line Items]
Debt issuances		$ 7,740,000,000
4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		4.85%
Debt issuances		$ 600,000,000
4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		4.85%
Debt issuances		$ 650,000,000
April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.648%
Debt issuances		$ 815,000,000	$ 815,000,000
June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.45%
Debt issuances		$ 750,000,000
June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.80%
Debt issuances		$ 750,000,000
June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.90%
Debt issuances		$ 80,000,000
June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		6%
Debt issuances		$ 95,000,000
June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		6.17%
Debt issuances		$ 50,000,000
August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.10%
Debt issuances		$ 375,000,000
August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		6.45%
Debt issuances		$ 1,000,000,000
Interest rate reset		5 years
Basis spread on variable rate (as a percent)		2.588%
Percentage of principal		100%
April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.404%
Debt issuances		$ 177,000,000
4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)		4.85%
Debt issuances		$ 575,000,000
5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)		5.40%
Debt issuances		$ 425,000,000
5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)		5.25%
Debt issuances		$ 300,000,000
5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)		5.10%
Debt issuances		$ 500,000,000
5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)		5.55%
Debt issuances		$ 425,000,000
April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)		5.008%
Debt issuances		$ 173,000,000
Maturities Due March 2024
Debt Instrument [Line Items]
Repayments of debt	$ 1,000,000,000
Variable Rate Term Loan Due March 2024 | Secured Debt
Debt Instrument [Line Items]
Repayment of debt			$ 1,000,000,000
Senior Notes 3.75% Due 2031 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			3.75%	3.75%
Debt issuances | €				€ 750
Duke Energy (Parent)
Debt Instrument [Line Items]
Debt issuances		4,565,000,000
Duke Energy (Parent) | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		600,000,000
Duke Energy (Parent) | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		650,000,000
Duke Energy (Parent) | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		815,000,000
Duke Energy (Parent) | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		750,000,000
Duke Energy (Parent) | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		750,000,000
Duke Energy (Parent) | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		1,000,000,000
Duke Energy (Parent) | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy (Parent) | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances		1,000,000,000
Duke Energy Carolinas | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		575,000,000
Duke Energy Carolinas | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		425,000,000
Duke Energy Carolinas | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Carolinas | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances		677,000,000
Duke Energy Progress | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		177,000,000
Duke Energy Progress | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		500,000,000
Duke Energy Progress | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Progress | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida
Debt Instrument [Line Items]
Debt issuances		173,000,000
Duke Energy Florida | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Florida | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		173,000,000
Duke Energy Ohio
Debt Instrument [Line Items]
Debt issuances		650,000,000
Duke Energy Ohio | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		80,000,000
Duke Energy Ohio | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		95,000,000
Duke Energy Ohio | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		50,000,000
Duke Energy Ohio | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Ohio | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		425,000,000
Duke Energy Ohio | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana
Debt Instrument [Line Items]
Debt issuances		300,000,000
Duke Energy Indiana | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		300,000,000
Duke Energy Indiana | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Duke Energy Indiana | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Piedmont
Debt Instrument [Line Items]
Debt issuances		375,000,000
Piedmont | 4.85% January 2024 2024 Notes Due January 2027 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | 4.85% January 2024 2024 Notes Due January 2029 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | April 2024 5.648% Notes Due April 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | June 2024 5.450% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | June 2024 5.800% Notes Due June 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | June 2024 5.900% Notes Due June 2031 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | June 2024 6.000% Notes Due July 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | June 2024 6.170% Notes Due July 2039 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | August 2024 5.100% Notes Due February 2035 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		375,000,000
Piedmont | August 2024 6.450% Notes Due September 2054 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | April 2024 5.404% Notes | Secured Debt
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | 4.85% January 2024 Notes Due January 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | 5.40% January 2024 Notes Due January 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | 5.25% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | 5.10% March 2024 Notes Due March 2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | 5.55% March 2024 Notes Due March 2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		0
Piedmont | April 2024 Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances		$ 0

Debt and Credit Facilities (Nar

Debt and Credit Facilities (Narrative) (Details) - USD ($)				3 Months Ended
	Nov. 07, 2024	Apr. 24, 2024	Mar. 26, 2024	Jun. 30, 2024	Sep. 30, 2024	Mar. 31, 2024
Master Credit Facility
Debt Instrument [Line Items]
Facility size					$ 9,000,000,000	$ 9,000,000,000
Duke Energy Florida | Master Credit Facility
Debt Instrument [Line Items]
Facility size					875,000,000
Duke Energy Progress | Master Credit Facility
Debt Instrument [Line Items]
Facility size					1,500,000,000
Duke Energy Carolinas | Master Credit Facility
Debt Instrument [Line Items]
Facility size					$ 1,400,000,000
Term Loan Facility | Duke Energy Term Loan Facility | Subsequent event
Debt Instrument [Line Items]
Facility term (in years)	2 years
Term Loan Facility | Duke Energy (Parent) | Duke Energy Term Loan Facility
Debt Instrument [Line Items]
Facility size			$ 700,000,000
Repayments of debt				$ 500,000,000
Facility term (in years)			364 days
Extension period (in years)			30 days
Borrowing amount		$ 500,000,000
Term Loan Facility | Duke Energy Florida | Duke Energy Term Loan Facility | Subsequent event
Debt Instrument [Line Items]
Facility size	$ 800,000,000
Facility term (in years)	364 days
Extension period (in years)	4 months
Borrowing amount	$ 100,000,000
Increase in term loan facility	400,000,000
Term Loan Facility | Duke Energy Progress | Duke Energy Term Loan Facility | Subsequent event
Debt Instrument [Line Items]
Facility size	$ 250,000,000
Extension period (in years)	6 months
Borrowing amount	$ 50,000,000
Increase in term loan facility	150,000,000
Term Loan Facility | Duke Energy Carolinas | Duke Energy Term Loan Facility | Subsequent event
Debt Instrument [Line Items]
Facility size	$ 700,000,000
Extension period (in years)	6 months
Borrowing amount	$ 50,000,000
Increase in term loan facility	$ 300,000,000

Debt and Credit Facilities (S_2

Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 3,597	$ 2,800
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 204
Duke Energy (Parent) | Debt Maturing April 2025, 3.364% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.364%
Current maturities of long-term debt	$ 420
Duke Energy (Parent) | Debt Maturing April 2025, 3.950% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.95%
Current maturities of long-term debt	$ 250
Duke Energy (Parent) | Debt Maturing September 2025, 0.900% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	0.90%
Current maturities of long-term debt	$ 650
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 150	0
Duke Energy Ohio | Debt Maturing June 2025, 6.900% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.90%
Current maturities of long-term debt	$ 150
Piedmont
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 150	40
Piedmont | Debt Maturing September 2025, 3.600% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.60%
Current maturities of long-term debt	$ 150
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 520	19
Duke Energy Carolinas | 6.177% Notes Due January 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.036%
Current maturities of long-term debt	$ 305
Duke Energy Carolinas | 5.973% Notes Due January 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.097%
Current maturities of long-term debt	$ 195
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 983	72
Duke Energy Progress | Debt Maturing August 2025, 3.500% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.25%
Current maturities of long-term debt	$ 500
Duke Energy Progress | 6.096% Notes Due April 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.096%
Current maturities of long-term debt	$ 240
Duke Energy Progress | 6.096% Notes Due April 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.096%
Current maturities of long-term debt	$ 160
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 436	$ 589
Duke Energy Florida | 4.998% Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.005%
Current maturities of long-term debt	$ 200
Duke Energy Florida | 4.970% Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.008%
Current maturities of long-term debt	$ 173
Duke Energy Florida | 4.998% Notes Due October 2073 And 4.970% Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Facility term (in years)	12 months

Debt and Credit Facilities (Sch

Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility - USD ($)	Sep. 30, 2024	Mar. 31, 2024
Line of Credit Facility [Line Items]
Facility size	$ 9,000,000,000	$ 9,000,000,000
Commercial paper	(3,526,000,000)
Outstanding letters of credit	(24,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	5,369,000,000
Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,400,000,000
Commercial paper	(300,000,000)
Outstanding letters of credit	(4,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	1,096,000,000
Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	1,500,000,000
Commercial paper	(698,000,000)
Outstanding letters of credit	(1,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	801,000,000
Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	875,000,000
Commercial paper	(175,000,000)
Outstanding letters of credit	(7,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	693,000,000
Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	1,050,000,000
Commercial paper	(206,000,000)
Outstanding letters of credit	0
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	844,000,000
Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(160,000,000)
Outstanding letters of credit	0
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	709,000,000
Piedmont
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(461,000,000)
Outstanding letters of credit	0
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	489,000,000
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	(1,526,000,000)
Outstanding letters of credit	(12,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	$ 737,000,000

Asset Retirement Obligations (A

Asset Retirement Obligations (ARO by Category) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Asset Retirement Obligations [Line Items]
Total ARO	$ 10,150	$ 9,156
Less: Current portion	639	596
Total noncurrent ARO	9,511	8,560
Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	3,980	4,013
Less: Current portion	253	224
Total noncurrent ARO	3,727	3,789
Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	4,723	4,145
Less: Current portion	227	245
Total noncurrent ARO	4,496	3,900
Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	4,518	3,870
Less: Current portion	225	244
Total noncurrent ARO	4,293	3,626
Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	205	275
Less: Current portion	2	1
Total noncurrent ARO	203	274
Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	137	136
Less: Current portion	7	6
Total noncurrent ARO	130	130
Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	1,278	809
Less: Current portion	152	120
Total noncurrent ARO	1,126	689
Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	27	26
Less: Current portion	0
Total noncurrent ARO	27	$ 26
Decommissioning of nuclear power facilities
Asset Retirement Obligations [Line Items]
Total ARO	4,634
Decommissioning of nuclear power facilities | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	2,024
Decommissioning of nuclear power facilities | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	2,605
Decommissioning of nuclear power facilities | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	2,483
Decommissioning of nuclear power facilities | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	122
Decommissioning of nuclear power facilities | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	0
Decommissioning of nuclear power facilities | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	0
Decommissioning of nuclear power facilities | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	0
Closure of ash impoundments
Asset Retirement Obligations [Line Items]
Total ARO	5,240
Closure of ash impoundments | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	1,899
Closure of ash impoundments | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	2,019
Closure of ash impoundments | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	2,001
Closure of ash impoundments | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	18
Closure of ash impoundments | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	72
Closure of ash impoundments | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	1,249
Closure of ash impoundments | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	0
Other
Asset Retirement Obligations [Line Items]
Total ARO	276
Other | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	57
Other | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	99
Other | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	34
Other | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	65
Other | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	65
Other | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	29
Other | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	$ 27

Asset Retirement Obligations _2

Asset Retirement Obligations (ARO Rollforward) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	$ 9,156
Accretion expense	316
Liabilities settled	(485)
Revision in estimates of cash flows	1,163
Balance at end of period	10,150
Duke Energy Carolinas
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	4,013
Accretion expense	137
Liabilities settled	(154)
Revision in estimates of cash flows	(16)
Balance at end of period	3,980
Progress Energy
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	4,145
Accretion expense	145
Liabilities settled	(254)
Revision in estimates of cash flows	687
Balance at end of period	4,723
Duke Energy Progress
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	3,870
Accretion expense	138
Liabilities settled	(181)
Revision in estimates of cash flows	691
Balance at end of period	4,518
Duke Energy Florida
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	275
Accretion expense	7
Liabilities settled	(73)
Revision in estimates of cash flows	(4)
Balance at end of period	205
Duke Energy Ohio
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	136
Accretion expense	5
Liabilities settled	(6)
Revision in estimates of cash flows	2
Balance at end of period	137
Duke Energy Indiana
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	809
Accretion expense	33
Liabilities settled	(70)
Revision in estimates of cash flows	506
Balance at end of period	1,278
Piedmont
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	26
Accretion expense	1
Liabilities settled	0
Revision in estimates of cash flows	0
Balance at end of period	$ 27

Goodwill (Details)

Goodwill (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 6,017	$ 5,891	$ 17,208	$ 16,679
Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,943	1,675	5,498	4,640
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	186	198	589	586
Duke Energy Carolinas | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	11	9	33	26
Duke Energy Carolinas | JDA | Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	48	58	141	121
Related party transaction, other revenues from transactions with related party	7	5	29	26
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	2,844	3,038	7,893	8,049
Progress Energy | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	165	172	524	522
Progress Energy | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	13	11	42	35
Progress Energy | JDA | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	7	5	29	26
Related party transaction, other revenues from transactions with related party	48	58	141	121
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	56
Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,449	1,392	4,122	3,845
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	104	103	318	314
Duke Energy Progress | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	5	17	15
Duke Energy Progress | JDA | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	7	5	29	26
Related party transaction, other revenues from transactions with related party	48	58	141	121
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	56
Duke Energy Florida
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,390	1,642	3,758	4,192
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	61	69	206	208
Duke Energy Florida | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	8	6	25	20
Duke Energy Ohio
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	496	449	1,494	1,485
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	74	73	228	222
Duke Energy Ohio | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2	1	5	4
Duke Energy Indiana
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	609	633	1,815	2,046
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	98	92	283	275
Duke Energy Indiana | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2	2	7	6
Piedmont
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	220	203	785	781
Piedmont | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	40	32	121	107
Piedmont | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1	1	3	3
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	70
Piedmont | Natural gas storage and transportation costs | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 5	$ 6	$ 17	$ 18

Related Party Transactions (Int

Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 0	$ 0
Intercompany income tax payable	115	81
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax receivable	0	0
Intercompany income tax payable	96	92
Duke Energy Progress
Related Party Transaction [Line Items]
Intercompany income tax receivable	0	0
Intercompany income tax payable	53	94
Duke Energy Florida
Related Party Transaction [Line Items]
Intercompany income tax receivable	0	0
Intercompany income tax payable	38	114
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax receivable	7	91
Intercompany income tax payable	0	0
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax receivable	28	53
Intercompany income tax payable	0	0
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax receivable	39	0
Intercompany income tax payable	$ 0	$ 57

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, 2024 USD ($) GWh Mcf	Dec. 31, 2023 USD ($) GWh Mcf
Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 6,027	$ 5,027
Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	19,823	13,608
Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	791	846
Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 2,825	$ 2,300
Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	3,202	2,727
Duke Energy Carolinas | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,150	$ 1,050
Duke Energy Carolinas | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	0	0
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	264	279
Duke Energy Carolinas | Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 0	$ 0
Duke Energy Carolinas | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	1,150	1,050
Progress Energy | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,775	$ 1,250
Progress Energy | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	0	0
Progress Energy | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	244	274
Progress Energy | Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 0	$ 0
Progress Energy | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	1,775	1,250
Duke Energy Progress | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,125	$ 925
Duke Energy Progress | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	0	0
Duke Energy Progress | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	244	274
Duke Energy Progress | Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 0	$ 0
Duke Energy Progress | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	1,125	925
Duke Energy Florida | Interest Rate Contracts
Derivative [Line Items]
Notional amount	650	325
Duke Energy Florida | Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	0	0
Duke Energy Florida | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	650	325
Duke Energy Indiana | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 250	$ 400
Duke Energy Indiana | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	17,349	11,992
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	30	30
Duke Energy Indiana | Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 0	$ 0
Duke Energy Indiana | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	250	400
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	2,474	1,616
Duke Energy Ohio | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	0	0
Duke Energy Ohio | Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 0	$ 0
Duke Energy Ohio | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Piedmont | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	0	0
Piedmont | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	253	263

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, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 1,997		$ 1,997
Receive notional | €					€ 1,850
Fair value gain (loss)	71	$ (37)	62	$ (19)
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)	$ 23	(20)	$ 23	(10)
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)	$ 19	(17)	$ 19	(9)
Senior Notes, 3.75% Due April 2031
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 815		$ 815
Pay Rate	5.648%		5.648%		5.648%
Receive notional | €					€ 750
Rate	0.0375		0.0375		0.0375
Fair value gain (loss)	$ 29	$ 0	$ 20	$ 0

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, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	$ 162	$ 189
Location and fair value amounts of derivatives (Liability)	561	729
Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	37	61
Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	125	128
Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	205	409
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	356	320
Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	70	82
Location and fair value amounts of derivatives (Liability)	379	609
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	38	63
Location and fair value amounts of derivatives (Liability)	152	103
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	54	44
Location and fair value amounts of derivatives (Liability)	30	17
Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	37	25
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	33	57
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	170	354
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	209	255
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		5
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	18	10
Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	5	13
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	95	39
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	20
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		31
Location and fair value amounts of derivatives (Liability)		25
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		17
Location and fair value amounts of derivatives (Liability)	52	26
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	54
Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	30	17
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		44
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	26	35
Location and fair value amounts of derivatives (Liability)	186	260
Duke Energy Carolinas | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	10	6
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	16	29
Duke Energy Carolinas | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	93	179
Duke Energy Carolinas | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	93	81
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	24	27
Location and fair value amounts of derivatives (Liability)	150	244
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	8
Location and fair value amounts of derivatives (Liability)	36	16
Duke Energy Carolinas | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
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)	10	1
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)	14	26
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)	93	177
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)	57	67
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)		5
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)	2	3
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	2
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	36	14
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Progress Energy
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	33	34
Location and fair value amounts of derivatives (Liability)	165	234
Progress Energy | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	8	3
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	25	31
Progress Energy | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	61	149
Progress Energy | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	104	85
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	27	34
Location and fair value amounts of derivatives (Liability)	101	199
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	0
Location and fair value amounts of derivatives (Liability)	64	35
Progress Energy | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	8	3
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	19	31
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	56	138
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	45	61
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)		0
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)	6	0
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	5	11
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	59	24
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	33	32
Location and fair value amounts of derivatives (Liability)	140	219
Duke Energy Progress | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	8	1
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	25	31
Duke Energy Progress | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	61	149
Duke Energy Progress | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	79	70
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	27	32
Location and fair value amounts of derivatives (Liability)	101	199
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	0
Location and fair value amounts of derivatives (Liability)	39	20
Duke Energy Progress | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
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)	8	1
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)	19	31
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)	56	138
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)	45	61
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)		0
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)	6	0
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	5	11
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	34	9
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	2
Location and fair value amounts of derivatives (Liability)	26	15
Duke Energy Florida | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	2
Duke Energy Florida | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Duke Energy Florida | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Florida | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	26	15
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	2
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Florida | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	26	15
Duke Energy Florida | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
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)	0	2
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
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)	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
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)		0
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)	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	26	15
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Location and fair value amounts of derivatives (Liability)	1	1
Duke Energy Ohio | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Duke Energy Ohio | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Duke Energy Ohio | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Ohio | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	1
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	1	1
Duke Energy Ohio | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
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	1
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
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	1
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	26	25
Location and fair value amounts of derivatives (Liability)	4	18
Duke Energy Indiana | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	16	18
Duke Energy Indiana | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	10	7
Duke Energy Indiana | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	4	18
Duke Energy Indiana | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	16	18
Location and fair value amounts of derivatives (Liability)	4	18
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	10	7
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Indiana | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
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)	16	18
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
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	18
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
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)		0
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)	10	7
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Piedmont
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Location and fair value amounts of derivatives (Liability)	124	147
Piedmont | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Piedmont | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Piedmont | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	17	20
Piedmont | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	107	127
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Location and fair value amounts of derivatives (Liability)	124	147
Piedmont | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
Piedmont | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Location and fair value amounts of derivatives (Liability)	0	0
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	2	1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	17	20
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	107	127
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0	0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	0	0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)		0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		0
Location and fair value amounts of derivatives (Liability)	0	0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	$ 0	0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		$ 0

Derivatives and Hedging (Schedu

Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 162	$ 189
Derivative Asset, Current	22	59
Net amounts presented in Current Assets: Other	99	91
Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	37	61
Offset	$ (15)	$ (2)
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 125	$ 128
Offset	$ (26)	$ (37)
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 26	$ 35
Derivative Asset, Current	2	5
Net amounts presented in Current Assets: Other	6	15
Duke Energy Carolinas | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	10	6
Offset	(8)	(1)
Duke Energy Carolinas | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	16	29
Offset	(10)	(14)
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	33	34
Derivative Asset, Current	1	2
Net amounts presented in Current Assets: Other	9	9
Progress Energy | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	8	3
Offset	(7)	(1)
Progress Energy | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	25	31
Offset	(16)	(22)
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	33	32
Derivative Asset, Current	1	0
Net amounts presented in Current Assets: Other	9	9
Duke Energy Progress | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	8	1
Offset	(7)	(1)
Duke Energy Progress | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	25	31
Offset	(16)	(22)
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	2
Derivative Asset, Current	0	2
Net amounts presented in Current Assets: Other	0	0
Duke Energy Florida | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	2
Offset	0	0
Duke Energy Florida | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	2	1
Derivative Asset, Current	2	1
Net amounts presented in Current Assets: Other	0	0
Duke Energy Ohio | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	2	1
Offset	0	0
Duke Energy Ohio | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	26	25
Derivative Asset, Current	16	18
Net amounts presented in Current Assets: Other	10	7
Duke Energy Indiana | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	16	18
Offset	0	0
Duke Energy Indiana | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	10	7
Offset	0	0
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	2	1
Derivative Asset, Current	2	1
Net amounts presented in Current Assets: Other	0	0
Piedmont | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	2	1
Offset	0	0
Piedmont | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	$ 0	$ 0

Derivatives and Hedging (Sche_2

Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 561	$ 729
Net amounts presented in Current Liabilities: Other	167	311
Net amounts presented in Other Noncurrent Liabilities: Other	300	217
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	205	409
Offset	(15)	(2)
Cash collateral posted	$ (23)	$ (96)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 356	$ 320
Offset	(26)	(37)
Cash collateral posted	$ (30)	$ (66)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 186	$ 260
Net amounts presented in Current Liabilities: Other	72	130
Net amounts presented in Other Noncurrent Liabilities: Other	61	29
Duke Energy Carolinas | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	93	179
Offset	(8)	(1)
Cash collateral posted	(13)	(48)
Duke Energy Carolinas | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	93	81
Offset	(10)	(14)
Cash collateral posted	(22)	(38)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	165	234
Net amounts presented in Current Liabilities: Other	49	118
Net amounts presented in Other Noncurrent Liabilities: Other	79	35
Progress Energy | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	61	149
Offset	(7)	(1)
Cash collateral posted	(5)	(30)
Progress Energy | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	104	85
Offset	(16)	(22)
Cash collateral posted	(9)	(28)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	140	219
Net amounts presented in Current Liabilities: Other	49	118
Net amounts presented in Other Noncurrent Liabilities: Other	54	20
Duke Energy Progress | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	61	149
Offset	(7)	(1)
Cash collateral posted	(5)	(30)
Duke Energy Progress | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	79	70
Offset	(16)	(22)
Cash collateral posted	(9)	(28)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	26	15
Net amounts presented in Current Liabilities: Other	0	0
Net amounts presented in Other Noncurrent Liabilities: Other	26	15
Duke Energy Florida | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Cash collateral posted	0	0
Duke Energy Florida | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	26	15
Offset	0	0
Cash collateral posted	0	0
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Net amounts presented in Current Liabilities: Other	0	0
Net amounts presented in Other Noncurrent Liabilities: Other	1	1
Duke Energy Ohio | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Cash collateral posted	0	0
Duke Energy Ohio | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Offset	0	0
Cash collateral posted	0	0
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	4	18
Net amounts presented in Current Liabilities: Other	0	0
Net amounts presented in Other Noncurrent Liabilities: Other	0	0
Duke Energy Indiana | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	4	18
Offset	0	0
Cash collateral posted	(4)	(18)
Duke Energy Indiana | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Cash collateral posted	0	0
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	124	147
Net amounts presented in Current Liabilities: Other	17	20
Net amounts presented in Other Noncurrent Liabilities: Other	107	127
Piedmont | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	17	20
Offset	0	0
Cash collateral posted	0	0
Piedmont | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	107	127
Offset	0	0
Cash collateral posted	$ 0	$ 0

Derivatives and Hedging (Deriva

Derivatives and Hedging (Derivative Instruments with Credit-Risk Related Contingent Features and Cash Collateral) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	$ 198	$ 342
Fair value of collateral already posted	48	144
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	150	198
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	103	175
Fair value of collateral already posted	34	86
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	69	89
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	95	166
Fair value of collateral already posted	14	58
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	81	108
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	95	166
Fair value of collateral already posted	14	58
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	$ 81	$ 108

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, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale
Estimated Fair Value	$ 3,419
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	6,133	$ 5,019
Unrealized Holding Losses	111	171
Estimated Fair Value	12,050	10,603
NDTF
Cash and Cash Equivalents
Estimated Fair Value	151	133
Equity Securities, FV-NI
Gross Unrealized Holding Gains	6,005	4,942
Gross Unrealized Holding Losses	11	22
Estimated Fair Value	8,224	7,278
Debt Securities, Available-for-sale
Estimated Fair Value	3,135	2,732
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	6,070	4,985
Unrealized Holding Losses	103	159
Estimated Fair Value	11,510	10,143
Other Investments
Cash and Cash Equivalents
Estimated Fair Value	68	31
Equity Securities, FV-NI
Gross Unrealized Holding Gains	62	33
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	188	158
Debt Securities, Available-for-sale
Estimated Fair Value	284	271
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	63	34
Unrealized Holding Losses	8	12
Estimated Fair Value	540	460
Duke Energy Carolinas
Debt Securities, Available-for-sale
Estimated Fair Value	1,707
Duke Energy Carolinas | NDTF
Cash and Cash Equivalents
Estimated Fair Value	69	51
Equity Securities, FV-NI
Gross Unrealized Holding Gains	3,476	2,886
Gross Unrealized Holding Losses	8	14
Estimated Fair Value	4,729	4,196
Debt Securities, Available-for-sale
Estimated Fair Value	1,707	1,438
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	3,507	2,904
Unrealized Holding Losses	68	99
Estimated Fair Value	6,505	5,685
Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	1,452
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,563	2,081
Unrealized Holding Losses	35	61
Estimated Fair Value	5,050	4,499
Progress Energy | NDTF
Cash and Cash Equivalents
Estimated Fair Value	82	82
Equity Securities, FV-NI
Gross Unrealized Holding Gains	2,529	2,056
Gross Unrealized Holding Losses	3	8
Estimated Fair Value	3,495	3,082
Debt Securities, Available-for-sale
Estimated Fair Value	1,428	1,294
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,563	2,081
Unrealized Holding Losses	35	60
Estimated Fair Value	5,005	4,458
Progress Energy | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	21	18
Debt Securities, Available-for-sale
Estimated Fair Value	24	23
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	0	0
Unrealized Holding Losses	0	1
Estimated Fair Value	45	41
Duke Energy Progress
Debt Securities, Available-for-sale
Estimated Fair Value	1,234
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,439	1,979
Unrealized Holding Losses	27	46
Estimated Fair Value	4,672	4,089
Duke Energy Progress | NDTF
Cash and Cash Equivalents
Estimated Fair Value	61	55
Equity Securities, FV-NI
Gross Unrealized Holding Gains	2,407	1,956
Gross Unrealized Holding Losses	3	8
Estimated Fair Value	3,361	2,970
Debt Securities, Available-for-sale
Estimated Fair Value	1,234	1,050
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,439	1,979
Unrealized Holding Losses	27	46
Estimated Fair Value	4,656	4,075
Duke Energy Progress | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	16	14
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	0	0
Unrealized Holding Losses	0	0
Estimated Fair Value	16	14
Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value	218
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	124	102
Unrealized Holding Losses	8	15
Estimated Fair Value	375	409
Duke Energy Florida | NDTF
Cash and Cash Equivalents
Estimated Fair Value	21	27
Equity Securities, FV-NI
Gross Unrealized Holding Gains	122	100
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	134	112
Debt Securities, Available-for-sale
Estimated Fair Value	194	244
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	124	102
Unrealized Holding Losses	8	14
Estimated Fair Value	349	383
Duke Energy Florida | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	2	3
Debt Securities, Available-for-sale
Estimated Fair Value	24	23
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	0	0
Unrealized Holding Losses	0	1
Estimated Fair Value	26	26
Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	66
Duke Energy Indiana | Other Investments
Cash and Cash Equivalents
Estimated Fair Value	2	1
Equity Securities, FV-NI
Gross Unrealized Holding Gains	22	4
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	117	98
Debt Securities, Available-for-sale
Estimated Fair Value	66	64
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	23	5
Unrealized Holding Losses	1	1
Estimated Fair Value	185	163
Corporate debt securities | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	20	12
Gross Unrealized Holding Losses	29	43
Estimated Fair Value	721	632
Corporate debt securities | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	3	6
Estimated Fair Value	92	82
Corporate debt securities | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	9	4
Gross Unrealized Holding Losses	25	35
Estimated Fair Value	458	390
Corporate debt securities | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	11	8
Gross Unrealized Holding Losses	4	8
Estimated Fair Value	263	242
Corporate debt securities | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	10	7
Gross Unrealized Holding Losses	4	8
Estimated Fair Value	252	229
Corporate debt securities | Duke Energy Florida | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	1
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	11	13
Corporate debt securities | Duke Energy Indiana | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	7	8
Municipal bonds | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	5	6
Gross Unrealized Holding Losses	10	16
Estimated Fair Value	342	347
Municipal bonds | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	1
Gross Unrealized Holding Losses	1	2
Estimated Fair Value	89	77
Municipal bonds | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	3	4
Estimated Fair Value	42	50
Municipal bonds | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	5	6
Gross Unrealized Holding Losses	7	12
Estimated Fair Value	300	297
Municipal bonds | Progress Energy | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	1
Estimated Fair Value	24	23
Municipal bonds | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	5	6
Gross Unrealized Holding Losses	7	12
Estimated Fair Value	300	297
Municipal bonds | Duke Energy Florida | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	1
Estimated Fair Value	24	23
Municipal bonds | Duke Energy Indiana | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	1
Gross Unrealized Holding Losses	1	1
Estimated Fair Value	52	46
U.S. government bonds | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	37	24
Gross Unrealized Holding Losses	46	65
Estimated Fair Value	1,824	1,575
U.S. government bonds | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	2	2
Estimated Fair Value	55	65
U.S. government bonds | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	19	13
Gross Unrealized Holding Losses	25	33
Estimated Fair Value	976	826
U.S. government bonds | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	18	11
Gross Unrealized Holding Losses	21	32
Estimated Fair Value	848	749
U.S. government bonds | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	17	10
Gross Unrealized Holding Losses	13	18
Estimated Fair Value	666	518
U.S. government bonds | Duke Energy Florida | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	1
Gross Unrealized Holding Losses	8	14
Estimated Fair Value	182	231
U.S. government bonds | Duke Energy Indiana | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	7	10
Other debt securities | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	3	1
Gross Unrealized Holding Losses	7	13
Estimated Fair Value	248	178
Other debt securities | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	2	2
Estimated Fair Value	48	47
Other debt securities | Duke Energy Carolinas | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	3	1
Gross Unrealized Holding Losses	7	13
Estimated Fair Value	231	172
Other debt securities | Progress Energy | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	17	6
Other debt securities | Duke Energy Progress | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	16	6
Other debt securities | Duke Energy Florida | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	$ 1	$ 0

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
FV-NI:
Realized gains	$ 61	$ 61	$ 256	$ 107
Realized losses	19	35	64	117
AFS:
Realized gains	10	16	22	37
Realized losses	8	45	44	104
Duke Energy Carolinas
FV-NI:
Realized gains	38	43	163	70
Realized losses	9	17	30	64
AFS:
Realized gains	6	12	11	21
Realized losses	5	26	22	54
Progress Energy
FV-NI:
Realized gains	23	18	93	37
Realized losses	10	18	34	53
AFS:
Realized gains	4	4	11	16
Realized losses	3	19	22	50
Duke Energy Progress
FV-NI:
Realized gains	23	15	93	34
Realized losses	10	18	34	52
AFS:
Realized gains	4	4	11	15
Realized losses	$ 3	$ 18	$ 21	$ 47

Investments in Debt and Equit_5

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions	Sep. 30, 2024 USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 92
Due after one through five years	862
Due after five through 10 years	712
Due after 10 years	1,753
Total	3,419
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	9
Due after one through five years	347
Due after five through 10 years	426
Due after 10 years	925
Total	1,707
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	68
Due after one through five years	431
Due after five through 10 years	234
Due after 10 years	719
Total	1,452
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	10
Due after one through five years	326
Due after five through 10 years	220
Due after 10 years	678
Total	1,234
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	58
Due after one through five years	105
Due after five through 10 years	14
Due after 10 years	41
Total	218
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	7
Due after one through five years	20
Due after five through 10 years	13
Due after 10 years	26
Total	$ 66

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurement Amounts for Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	$ 3,419
Derivative assets	162	$ 189
Total assets	12,212	10,792
Derivative liabilities	(561)	(729)
Net assets (liabilities)	11,651	10,063
NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	151	133
Estimated Fair Value	8,224	7,278
Debt securities, available-for-sale	3,135	2,732
NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	8,224	7,278
Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	68	31
Estimated Fair Value	188	158
Debt securities, available-for-sale	284	271
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2	37
Total assets	9,664	8,484
Derivative liabilities	(34)	(60)
Net assets (liabilities)	9,630	8,424
Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	151	133
Debt securities, available-for-sale	1,012	829
Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	8,195	7,241
Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	68	31
Estimated Fair Value	188	158
Debt securities, available-for-sale	48	55
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	143	137
Total assets	2,502	2,256
Derivative liabilities	(527)	(669)
Net assets (liabilities)	1,975	1,587
Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	2,123	1,903
Level 2 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	0	0
Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Estimated Fair Value	0	0
Debt securities, available-for-sale	236	216
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	17	15
Total assets	17	15
Derivative liabilities	0	0
Net assets (liabilities)	17	15
Level 3 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	0	0
Level 3 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	0	0
Level 3 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Estimated Fair Value	0	0
Debt securities, available-for-sale	0	0
Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Total assets	29	37
Derivative liabilities	0	0
Net assets (liabilities)	29	37
Not Categorized | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	0	0
Not Categorized | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	29	37
Not Categorized | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Estimated Fair Value	0	0
Debt securities, available-for-sale	0	0
Duke Energy Carolinas
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,707
Derivative assets	26	35
Total assets	6,531	5,720
Derivative liabilities	(186)	(260)
Net assets (liabilities)	6,345	5,460
Duke Energy Carolinas | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	69	51
Estimated Fair Value	4,729	4,196
Debt securities, available-for-sale	1,707	1,438
Duke Energy Carolinas | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	4,729	4,196
Duke Energy Carolinas | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Total assets	5,260	4,585
Derivative liabilities	0	0
Net assets (liabilities)	5,260	4,585
Duke Energy Carolinas | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	69	51
Debt securities, available-for-sale	491	375
Duke Energy Carolinas | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	4,700	4,159
Duke Energy Carolinas | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	26	35
Total assets	1,242	1,098
Derivative liabilities	(186)	(260)
Net assets (liabilities)	1,056	838
Duke Energy Carolinas | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	1,216	1,063
Duke Energy Carolinas | Level 2 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	0	0
Duke Energy Carolinas | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Total assets	29	37
Derivative liabilities	0	0
Net assets (liabilities)	29	37
Duke Energy Carolinas | Not Categorized | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	0	0
Duke Energy Carolinas | Not Categorized | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	29	37
Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,452
Derivative assets	33	34
Total assets	5,083	4,533
Derivative liabilities	(165)	(234)
Net assets (liabilities)	4,918	4,299
Progress Energy | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	82	82
Estimated Fair Value	3,495	3,082
Debt securities, available-for-sale	1,428	1,294
Progress Energy | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	3,495	3,082
Progress Energy | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	21	18
Debt securities, available-for-sale	24	23
Progress Energy | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Total assets	4,119	3,636
Derivative liabilities	0	0
Net assets (liabilities)	4,119	3,636
Progress Energy | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	82	82
Debt securities, available-for-sale	521	454
Progress Energy | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	3,495	3,082
Progress Energy | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	21	18
Debt securities, available-for-sale	0	0
Progress Energy | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	33	34
Total assets	964	897
Derivative liabilities	(165)	(234)
Net assets (liabilities)	799	663
Progress Energy | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	907	840
Progress Energy | Level 2 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	0	0
Progress Energy | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	24	23
Duke Energy Progress
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,234
Derivative assets	33	32
Total assets	4,705	4,121
Derivative liabilities	(140)	(219)
Net assets (liabilities)	4,565	3,902
Duke Energy Progress | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	61	55
Estimated Fair Value	3,361	2,970
Debt securities, available-for-sale	1,234	1,050
Duke Energy Progress | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	3,361	2,970
Duke Energy Progress | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	16	14
Duke Energy Progress | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Total assets	3,813	3,305
Derivative liabilities	0	0
Net assets (liabilities)	3,813	3,305
Duke Energy Progress | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	61	55
Debt securities, available-for-sale	375	266
Duke Energy Progress | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	3,361	2,970
Duke Energy Progress | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	16	14
Duke Energy Progress | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	33	32
Total assets	892	816
Derivative liabilities	(140)	(219)
Net assets (liabilities)	752	597
Duke Energy Progress | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	859	784
Duke Energy Progress | Level 2 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	0	0
Duke Energy Progress | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Duke Energy Florida
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	218
Derivative assets	0	2
Total assets	375	411
Derivative liabilities	(26)	(15)
Net assets (liabilities)	349	396
Duke Energy Florida | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	21	27
Estimated Fair Value	134	112
Debt securities, available-for-sale	194	244
Duke Energy Florida | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	134	112
Duke Energy Florida | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	2	3
Debt securities, available-for-sale	24	23
Duke Energy Florida | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Total assets	303	330
Derivative liabilities	0	0
Net assets (liabilities)	303	330
Duke Energy Florida | Level 1 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	21	27
Debt securities, available-for-sale	146	188
Duke Energy Florida | Level 1 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	134	112
Duke Energy Florida | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	2	3
Debt securities, available-for-sale	0	0
Duke Energy Florida | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	2
Total assets	72	81
Derivative liabilities	(26)	(15)
Net assets (liabilities)	46	66
Duke Energy Florida | Level 2 | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	48	56
Duke Energy Florida | Level 2 | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated Fair Value	0	0
Duke Energy Florida | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available-for-sale	24	23
Duke Energy Indiana
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	66
Derivative assets	26	25
Total assets	211	188
Derivative liabilities	(4)	(18)
Net assets (liabilities)	207	170
Duke Energy Indiana | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	2	1
Estimated Fair Value	117	98
Debt securities, available-for-sale	66	64
Duke Energy Indiana | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	5
Total assets	119	104
Derivative liabilities	(4)	(18)
Net assets (liabilities)	115	86
Duke Energy Indiana | Level 1 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	2	1
Estimated Fair Value	117	98
Debt securities, available-for-sale	0	0
Duke Energy Indiana | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	11	7
Total assets	77	71
Derivative liabilities	0	0
Net assets (liabilities)	77	71
Duke Energy Indiana | Level 2 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Estimated Fair Value	0	0
Debt securities, available-for-sale	66	64
Duke Energy Indiana | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	15	13
Total assets	15	13
Derivative liabilities	0	0
Net assets (liabilities)	15	13
Duke Energy Indiana | Level 3 | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Estimated Fair Value	0	0
Debt securities, available-for-sale	0	0
Piedmont
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2	1
Derivative liabilities	(124)	(147)
Net assets (liabilities)	(122)	(146)
Piedmont | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2	1
Derivative liabilities	0	0
Net assets (liabilities)	2	1
Piedmont | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	(124)	(147)
Net assets (liabilities)	$ (124)	$ (147)

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivatives (net)
Balance at beginning of period	$ 35	$ 41	$ 15	$ 34
Purchases, sales, issuances and settlements:
Purchases	0	3	29	50
Settlements	(13)	(18)	(36)	(76)
Total (losses) gains included on the Condensed Consolidated Balance Sheet	(5)	4	9	22
Balance at end of period	17	30	17	30
Duke Energy Indiana
Derivatives (net)
Balance at beginning of period	33	37	13	29
Purchases, sales, issuances and settlements:
Purchases			27	42
Settlements	(13)	(14)	(33)	(70)
Total (losses) gains included on the Condensed Consolidated Balance Sheet	(5)	4	8	26
Balance at end of period	$ 15	$ 27	$ 15	$ 27

Fair Value Measurements (Quanti

Fair Value Measurements (Quantitative Level 3 Fair Value Disclosures) (Details) $ in Millions	Sep. 30, 2024 USD ($) $ / MWh	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / MWh	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 17	$ 35	$ 15	$ 30	$ 41	$ 34
Duke Energy Ohio | FTRs | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 2		$ 2
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		0.36
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)	1.35		2.11
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)	0.56		0.71
Duke Energy Indiana
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 15	$ 33	$ 13	$ 27	$ 37	$ 29
Duke Energy Indiana | FTRs | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 15		$ 13
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)	(0.76)		(1.05)
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)	12.83		9.64
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)	1.19		1.26

Fair Value Measurements (Other

Fair Value Measurements (Other Fair Value Disclosure) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 80,121	$ 75,252
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	76,285	69,790
Piedmont Natural Gas and Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt discount (premium), net	1,000	1,000
Duke Energy Carolinas | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	17,032	16,012
Duke Energy Carolinas | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	16,342	15,077
Progress Energy | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	24,214	23,759
Progress Energy | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	23,422	22,553
Duke Energy Progress | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	12,323	11,714
Duke Energy Progress | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	11,430	10,595
Duke Energy Florida | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	10,248	10,401
Duke Energy Florida | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	10,124	10,123
Duke Energy Ohio | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,164	3,518
Duke Energy Ohio | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,087	3,310
Duke Energy Indiana | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,801	4,502
Duke Energy Indiana | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,605	4,230
Piedmont | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,003	3,668
Piedmont | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 3,754	$ 3,336

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Details) - VIE primary beneficiary - USD ($)	1 Months Ended			9 Months Ended	12 Months Ended
	Apr. 30, 2024	Mar. 31, 2024	Nov. 30, 2021	Sep. 30, 2024	Dec. 31, 2023	Apr. 01, 2024	Feb. 29, 2024
Variable Interest Entities [Line Items]
Variable interest entity, financial or other support, amount				$ 0	$ 0
Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt
Variable Interest Entities [Line Items]
Repayments of debt	$ 325,000,000
CRC
Variable Interest Entities [Line Items]
Repayments of debt		$ 350,000,000
Accounts receivable from securitization				$ 0	663,000,000		$ 682,000,000
Percent of proceeds received as cash				75%
Percent of proceeds received as subordinated note				25%
Minimum equity balance required by Cinergy Receivables				$ 3,000,000
CRC | Duke Energy Indiana
Variable Interest Entities [Line Items]
Accounts receivable from securitization							316,000,000
CRC | Duke Energy Ohio
Variable Interest Entities [Line Items]
Accounts receivable from securitization							$ 366,000,000
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
DEFR | Duke Energy Florida
Variable Interest Entities [Line Items]
Accounts receivable from securitization				$ 0	$ 532,000,000	$ 459,000,000
DEPSCSF | Duke Energy Progress
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds	$ 177,000,000

Variable Interest Entities (Sch

Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($)	Sep. 30, 2024	Apr. 01, 2024	Feb. 29, 2024	Dec. 31, 2023
Variable Interest Entities [Line Items]
Long-Term Debt	$ 76,524,000,000			$ 72,452,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Long-Term Debt	16,212,000,000			15,693,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Long-Term Debt	11,190,000,000			11,492,000,000
Duke Energy Florida
Variable Interest Entities [Line Items]
Long-Term Debt	9,812,000,000			9,812,000,000
CRC | VIE primary beneficiary
Variable Interest Entities [Line Items]
Long-Term Debt	0			312,000,000
Accounts receivable from securitization	0		$ 682,000,000	663,000,000
DERF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	500,000,000
Long-Term Debt	500,000,000			500,000,000
Accounts receivable from securitization	1,149,000,000			991,000,000
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	822,000,000			833,000,000
DEFR | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Long-Term Debt	0			325,000,000
Accounts receivable from securitization	$ 0	$ 459,000,000		$ 532,000,000

Variable Interest Entities (S_2

Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 2,300	$ 3,648
Current Assets: Other	447	431
Other Noncurrent Assets: Regulatory assets	13,778	13,618
Other	3,732	3,964
Current Liabilities: Other	2,122	2,319
Current maturities of long-term debt	3,597	2,800
Long-Term Debt	76,524	72,452
Inventory	4,338	4,292
Accounts payable	3,953	4,228
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	927	1,564
Current Assets: Other	48	31
Other Noncurrent Assets: Regulatory assets	3,867	3,916
Other	1,165	1,109
Current Liabilities: Other	589	702
Current maturities of long-term debt	520	19
Long-Term Debt	16,212	15,693
Inventory	1,482	1,484
Accounts payable	1,302	1,183
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	691	942
Current Assets: Other	62	72
Other Noncurrent Assets: Regulatory assets	4,489	4,546
Other	719	682
Current Liabilities: Other	442	481
Current maturities of long-term debt	983	72
Long-Term Debt	11,190	11,492
Inventory	1,320	1,227
Accounts payable	502	634
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	261	720
Current Assets: Other	40	51
Other Noncurrent Assets: Regulatory assets	2,071	1,883
Other	497	429
Current Liabilities: Other	330	350
Current maturities of long-term debt	436	589
Long-Term Debt	9,812	9,812
Inventory	686	674
Accounts payable	882	738
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	6	9
Other Noncurrent Assets: Regulatory assets	188	196
Other	1	1
Current Liabilities: Other	1	10
Current maturities of long-term debt	10	3
Long-Term Debt	198	208
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	19	31
Other Noncurrent Assets: Regulatory assets	617	643
Other	4	2
Current Liabilities: Other	4	34
Current maturities of long-term debt	34	8
Long-Term Debt	646	680
DEPSCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	8
Current Assets: Other	8
Other Noncurrent Assets: Regulatory assets	157
Other	1
Current Liabilities: Other	4
Current maturities of long-term debt	9
Long-Term Debt	163
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	60	59
Current Assets: Other	18	37
Other Noncurrent Assets: Regulatory assets	754	803
Current Liabilities: Other	2	8
Current maturities of long-term debt	59	59
Long-Term Debt	772	831
DEF ProCo | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Inventory	477	462
Accounts payable	$ 199	$ 188

Variable Interest Entities (S_3

Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Variable Interest Entities [Line Items]
Receivables from affiliated companies	$ 2,161	$ 1,112
Investments in equity method unconsolidated affiliates	477	492
Other noncurrent assets	3,732	3,964
Total Assets	183,566	176,893
Other current liabilities	2,122	2,319
Other	1,731	1,393
Duke Energy Ohio
Variable Interest Entities [Line Items]
Other noncurrent assets	94	84
Total Assets	12,611	12,216
Other current liabilities	68	65
Other	94	86
Duke Energy Ohio | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	11	239
Duke Energy Ohio | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	0	0
Other noncurrent assets	0	0
Total Assets	0	150
Other current liabilities	0	0
Other	0	0
Total liabilities	0	0
Net assets	0	150
Duke Energy Ohio | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	0	150
Duke Energy Indiana
Variable Interest Entities [Line Items]
Other noncurrent assets	384	325
Total Assets	15,690	14,811
Other current liabilities	198	184
Other	15	0
Duke Energy Indiana | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	5	197
Duke Energy Indiana | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	0	0
Other noncurrent assets	0	0
Total Assets	0	208
Other current liabilities	0	0
Other	0	0
Total liabilities	0	0
Net assets	0	208
Duke Energy Indiana | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	0	208
Pipeline Investments | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	55	67
Other noncurrent assets	30	43
Total Assets	85	110
Other current liabilities	4	4
Other	1	5
Total liabilities	5	9
Net assets	80	101
Pipeline Investments | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	$ 0	$ 0

Variable Interest Entities (Rec

Variable Interest Entities (Receivables Sold) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables sold	$ 0	$ 361
Less: Retained interests	0	150
Net receivables sold	0	211
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables sold	0	351
Less: Retained interests	0	208
Net receivables sold	$ 0	$ 143

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, 2024	Sep. 30, 2023
Duke Energy Ohio
Sales
Receivables sold	$ 474	$ 1,973
Loss recognized on sale	7	25
Cash flows
Cash proceeds from receivables sold	478	2,024
Collection fees received	0	1
Return received on retained interests	4	15
Duke Energy Indiana
Sales
Receivables sold	473	2,646
Loss recognized on sale	6	15
Cash flows
Cash proceeds from receivables sold	523	2,465
Collection fees received	0	1
Return received on retained interests	$ 4	$ 9

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations) (Details) $ in Millions	Sep. 30, 2024 USD ($)
Duke Energy Carolinas
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 51
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
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	$ 3
Duke Energy Carolinas | 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	$ 12
Duke Energy Carolinas | 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	$ 12
Duke Energy Carolinas | 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	$ 12
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 12
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 0
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 98
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
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	$ 18
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	$ 30
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	1 year
Revenue, remaining performance obligation, amount	$ 7
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 29
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
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]: 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	$ 0
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
Revenue, remaining performance obligation, amount	$ 0
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
Revenue, remaining performance obligation, amount	$ 0
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 0
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 0
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 96
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
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	$ 16
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	$ 30
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	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 29
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 58
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
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]: 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	$ 17
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	$ 15
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	1 year
Revenue, remaining performance obligation, amount	$ 5
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 0
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 417
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
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	$ 16
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	$ 60
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	1 year
Revenue, remaining performance obligation, amount	$ 46
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 195

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 8,127	$ 7,977	$ 22,810	$ 21,551
Revenue from sources other than contracts with customers	27	17	187	297
Total operating revenues	8,154	7,994	22,997	21,848
Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	7,806	7,675	21,275	20,072
Total operating revenues	7,833	7,695	21,420	20,308
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,738	3,602	9,945	9,193
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,287	2,229	6,234	5,936
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	924	912	2,615	2,630
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	620	647	1,698	1,695
Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	237	285	783	618
Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	309	294	1,505	1,455
Total operating revenues	309	291	1,547	1,516
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	157	152	859	838
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	91	88	434	421
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	36	26	115	103
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	25	28	97	93
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			30
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12	8		24
Duke Energy Carolinas
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,677	2,378	7,343	6,116
Revenue from sources other than contracts with customers	30	15	68	39
Total operating revenues	2,707	2,393	7,411	6,155
Duke Energy Carolinas | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,677	2,378	7,343	6,116
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,173	988	3,190	2,527
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	859	779	2,331	1,974
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	416	395	1,130	1,011
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	158	141	423	402
Duke Energy Carolinas | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	71	75	269	202
Duke Energy Carolinas | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Carolinas | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0
Duke Energy Carolinas | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0		0
Progress Energy
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,843	4,027	10,345	10,211
Revenue from sources other than contracts with customers	17	28	100	104
Total operating revenues	3,860	4,055	10,445	10,315
Progress Energy | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,843	4,027	10,345	10,211
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,973	2,043	5,115	5,019
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,035	1,089	2,834	2,844
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	275	298	808	844
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	394	422	1,086	1,064
Progress Energy | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	166	175	502	440
Progress Energy | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Progress Energy | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Progress Energy | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0
Progress Energy | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0		0
Duke Energy Progress
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,930	1,890	5,335	4,836
Revenue from sources other than contracts with customers	(16)	(4)	3	8
Total operating revenues	1,914	1,886	5,338	4,844
Duke Energy Progress | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,930	1,890	5,335	4,836
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	811	756	2,214	1,902
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	485	467	1,334	1,194
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	196	203	556	560
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	350	364	974	942
Duke Energy Progress | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	88	100	257	238
Duke Energy Progress | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Progress | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Progress | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0
Duke Energy Progress | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0		0
Duke Energy Florida
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,913	2,137	5,010	5,375
Revenue from sources other than contracts with customers	27	27	82	81
Total operating revenues	1,940	2,164	5,092	5,456
Duke Energy Florida | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,913	2,137	5,010	5,375
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,162	1,287	2,901	3,117
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	550	622	1,500	1,650
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	79	95	252	284
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	44	58	112	122
Duke Energy Florida | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	78	75	245	202
Duke Energy Florida | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Florida | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Florida | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0
Duke Energy Florida | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0		0
Duke Energy Ohio
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	613	572	1,889	1,846
Revenue from sources other than contracts with customers	(8)	5	2	29
Total operating revenues	605	577	1,891	1,875
Duke Energy Ohio | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	505	467	1,429	1,382
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	275	268	768	710
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	152	135	448	411
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	39	28	110	155
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	15	12	39	33
Duke Energy Ohio | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	24	24	64	73
Duke Energy Ohio | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	108	105	460	464
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	74	73	307	317
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	24	111	113
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	4	23	19
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Ohio | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5	4	19	15
Duke Energy Ohio | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0
Duke Energy Ohio | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0		0
Duke Energy Indiana
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	828	844	2,308	2,559
Revenue from sources other than contracts with customers	8	7	34	47
Total operating revenues	836	851	2,342	2,606
Duke Energy Indiana | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	828	844	2,308	2,559
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	316	303	872	937
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	243	224	624	706
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	193	190	566	618
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	53	71	150	195
Duke Energy Indiana | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	56	96	103
Duke Energy Indiana | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Indiana | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Duke Energy Indiana | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			0
Duke Energy Indiana | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0		0
Piedmont
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	209	199	1,069	1,016
Revenue from sources other than contracts with customers	10	9	70	103
Total operating revenues	219	208	1,139	1,119
Piedmont | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Piedmont | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Piedmont | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	209	199	1,069	1,016
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	83	80	552	522
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	68	65	323	309
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	30	23	92	84
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	8	23	24	69
Piedmont | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	20	8	78	32
Piedmont | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			$ 0
Piedmont | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 0	$ 0		$ 0

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 207	$ 199	$ 205	$ 216
Write-Offs	(29)	(36)	(97)	(121)
Credit Loss Expense	34	23	79	62
Other Adjustments	6	17	31	46
Ending balance	218	203	218	203
Duke Energy Carolinas
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	65	57	56	68
Write-Offs	(13)	(14)	(41)	(54)
Credit Loss Expense	15	5	32	18
Other Adjustments	3	8	23	24
Ending balance	70	56	70	56
Progress Energy
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	73	73	74	81
Write-Offs	(16)	(20)	(49)	(60)
Credit Loss Expense	18	15	38	33
Other Adjustments	4	9	16	23
Ending balance	79	77	79	77
Duke Energy Progress
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	47	43	44	44
Write-Offs	(10)	(11)	(29)	(30)
Credit Loss Expense	7	2	17	7
Other Adjustments	4	10	16	23
Ending balance	48	44	48	44
Duke Energy Florida
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	26	30	31	36
Write-Offs	(6)	(8)	(20)	(28)
Credit Loss Expense	11	13	21	26
Other Adjustments	0	(1)	(1)	0
Ending balance	31	34	31	34
Duke Energy Ohio
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	42	8	9	6
Write-Offs	0	0	0	0
Credit Loss Expense	0	0	2	2
Other Adjustments	(1)	0	30	0
Ending balance	41	8	41	8
Duke Energy Indiana
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	16	4	5	4
Write-Offs	0	0	0	0
Credit Loss Expense	0	1	2	1
Other Adjustments	0	0	9	0
Ending balance	16	5	16	5
Piedmont
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11	13	11	14
Write-Offs	0	(5)	(4)	(11)
Credit Loss Expense	1	2	5	7
Other Adjustments	0	0	0	0
Ending balance	$ 12	$ 10	$ 12	$ 10

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Class of Stock [Line Items]
Net Income Available to Duke Energy Corporation Common Stockholders	$ 1,226	$ 1,213	$ 3,211	$ 1,744
Loss From Discontinued Operations, net of tax	22	(190)	9	(1,283)
Accumulated preferred stock dividends adjustment	14	12	14	12
Less: Impact of participating securities	2	2	4	4
Income from continuing operations available to Duke Energy common stockholders	1,216	1,413	3,212	3,035
Income (Loss) from discontinued operations, net of tax	25	(152)	12	(1,316)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	$ (3)	$ (38)	$ (3)	$ 33
Weighted average common shares outstanding – basic (in shares)	772	771	772	771
Equity forwards (in shares)	1			0
Weighted average common shares outstanding – diluted (in shares)	773	771	772	771
Basic (in usd per share)	$ 1.57	$ 1.83	$ 4.16	$ 3.94
Diluted (in usd per share)	1.57	1.83	4.16	3.94
EPS from continuing operations available to Duke Energy common stockholders
Basic (usd per share)	0.03	(0.24)	0.01	(1.67)
Diluted (usd per share)	$ 0.03	$ (0.24)	$ 0.01	$ (1.67)
Potentially dilutive items excluded from the calculation (in shares)	2	2	2	2
Dividends declared per common share (in usd per share)	$ 1.045	$ 1.025	$ 3.095	$ 3.035
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%

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 16, 2024	Nov. 30, 2022	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Class of Stock [Line Items]
Maximum value of shares to be issued under ATM program		$ 1,500
Less: Preferred Redemption Costs			$ 16	$ 0	$ 16	$ 0
Preferred stock, Series B
Class of Stock [Line Items]
Outstanding shares redeemed (in shares)	1
Redemption price (in usd per share)	$ 1,000
Preferred stock, redemption price	$ 1,000
Less: Preferred Redemption Costs	16
Preferred stock	11		$ 0		$ 0		$ 989
Excise tax liability	$ 5

Stockholders' Equity - Equity I

Stockholders' Equity - Equity Issuances Pursuant to Forward Contracts (Details) - If net share settlement was elected	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Priced (shares)	2,931,591
Equity Forwards, First Tranche
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Priced (shares)	802,371
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares	$ 92.77
Equity Forwards, Second Tranche
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Priced (shares)	729,674
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares	$ 101.10
Equity Forwards, Third Tranche
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Priced (shares)	737,280
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares	$ 100.99
Equity Forwards, Fourth Tranche
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Priced (shares)	662,266
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares	$ 111.45

Employee Benefit Plans (Plan Co

Employee Benefit Plans (Plan Contributions) (Details) - Qualified Pension Plans - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	$ 100	$ 100
Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	26	26
Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	23	22
Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	14	13
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	9	9
Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	5	5
Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	8	8
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	$ 3	$ 3

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - Qualified Pension Plans $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	5%
Cash balance interest crediting rate (as a percent)	4%
Remeasurement gain (loss) recognized	$ 11
Increase (decrease) in plan assets	117
Increase in projected benefit obligation	(128)
Settlement charge	72
Regulatory Assets, Noncurrent
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	60
Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	12
Accumulated Other Comprehensive Income (Loss), Net of Tax
Defined Benefit Plan Disclosure [Line Items]
Remeasurement gain (loss) recognized	1
Regulatory Assets, Noncurrent
Defined Benefit Plan Disclosure [Line Items]
Remeasurement gain (loss) recognized	$ 10

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 28	$ 28	$ 85	$ 87
Interest cost on projected benefit obligation	82	86	247	258
Expected return on plan assets	(154)	(147)	(462)	(441)
Amortization of actuarial loss	9	2	25	7
Amortization of prior service credit	(3)	(3)	(10)	(10)
Amortization of settlement charges	17	5	26	14
Net periodic pension costs	(21)	(29)	(89)	(85)
Duke Energy Carolinas
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	9	28	28
Interest cost on projected benefit obligation	19	21	59	63
Expected return on plan assets	(41)	(40)	(122)	(120)
Amortization of actuarial loss	2	0	6	1
Amortization of prior service credit	0	0	0	0
Amortization of settlement charges	5	3	9	7
Net periodic pension costs	(6)	(7)	(20)	(21)
Progress Energy
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	8	9	24	25
Interest cost on projected benefit obligation	26	26	78	80
Expected return on plan assets	(55)	(50)	(163)	(149)
Amortization of actuarial loss	2	1	7	3
Amortization of prior service credit	0	0	0	0
Amortization of settlement charges	7	1	9	3
Net periodic pension costs	(12)	(13)	(45)	(38)
Duke Energy Progress
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	5	5	15	15
Interest cost on projected benefit obligation	12	12	36	37
Expected return on plan assets	(25)	(24)	(75)	(70)
Amortization of actuarial loss	1	0	4	1
Amortization of prior service credit	0	0	0	0
Amortization of settlement charges	6	1	8	3
Net periodic pension costs	(1)	(6)	(12)	(14)
Duke Energy Florida
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	3	3	10	10
Interest cost on projected benefit obligation	14	14	42	43
Expected return on plan assets	(29)	(26)	(87)	(78)
Amortization of actuarial loss	1	1	3	2
Amortization of prior service credit	0	0	0	0
Amortization of settlement charges	0	0	1	1
Net periodic pension costs	(11)	(8)	(31)	(22)
Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	2	2
Interest cost on projected benefit obligation	5	4	13	13
Expected return on plan assets	(6)	(6)	(19)	(18)
Amortization of actuarial loss	0	0	1	0
Amortization of prior service credit	0	0	0	0
Amortization of settlement charges	2	0	2	0
Net periodic pension costs	2	(1)	(1)	(3)
Duke Energy Indiana
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	4	4
Interest cost on projected benefit obligation	6	6	19	20
Expected return on plan assets	(10)	(10)	(31)	(30)
Amortization of actuarial loss	1	1	3	2
Amortization of prior service credit	0	0	(1)	(1)
Amortization of settlement charges	0	0	1	1
Net periodic pension costs	(2)	(2)	(5)	(4)
Piedmont
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	3	3
Interest cost on projected benefit obligation	2	2	7	7
Expected return on plan assets	(5)	(5)	(15)	(15)
Amortization of actuarial loss	1	0	2	0
Amortization of prior service credit	(1)	(1)	(5)	(5)
Amortization of settlement charges	2	1	4	3
Net periodic pension costs	$ 0	$ (2)	$ (4)	$ (7)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 31, 2024	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2024
Tax Credit Carryforward [Line Items]
Increase in ETR		$ 120	$ 120
Duke Energy Carolinas
Tax Credit Carryforward [Line Items]
Deferred tax asset				$ 325
Duke Energy Carolinas | Subsequent event
Tax Credit Carryforward [Line Items]
Tax credits	$ 174
Duke Energy Carolinas | Subsequent event | Sale of Nuclear Power PTCs
Tax Credit Carryforward [Line Items]
Decrease in deferred tax asset	$ 150
Duke Energy Progress
Tax Credit Carryforward [Line Items]
Deferred tax asset				$ 59

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rates) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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	11.20%	2.80%	12.50%	9%
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	7.70%	4.90%	9.80%	8%
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	16.10%	15.70%	16.40%	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	12.90%	11.80%	14.10%	13%
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	20.50%	20.80%	19.90%	20.30%
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	11.90%	14.90%	15.80%	15.80%
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	15.70%	18.50%	16.30%	17.80%
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	29.40%	26.30%	18.40%	17.20%