Employee Benefit Plans (Amounts Recognized in Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	$ 434	$ 485
Regulatory assets	17,010	17,266
Regulatory liabilities	16,119	15,408
Duke Energy Carolinas
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	24	57
Regulatory assets	4,884	5,480
Regulatory liabilities	7,210	6,577
Progress Energy
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	254	266
Regulatory assets	8,265	8,091
Regulatory liabilities	5,780	5,501
Duke Energy Progress
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	141	146
Regulatory assets	5,181	5,488
Regulatory liabilities	4,918	4,675
Duke Energy Florida
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	92	98
Regulatory assets	3,086	2,603
Regulatory liabilities	862	826
Duke Energy Ohio
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	89	97
Regulatory assets	793	749
Regulatory liabilities	499	553
Duke Energy Indiana
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	82	115
Regulatory assets	1,153	996
Regulatory liabilities	1,587	1,668
Piedmont
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	7	8
Regulatory assets	579	571
Regulatory liabilities	1,024	1,086
Pension Plan
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	907	863
Net asset (liability) recognized	(907)	(863)
Regulatory assets	2,168	2,021
Accumulated other comprehensive income (loss)
Deferred income tax benefit	(24)	(27)
Prior service credit		(1)
Net actuarial gain	115	127
Net amounts recognized in accumulated other comprehensive income	91	99
Pension Plan | Duke Energy Carolinas
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	337	339
Net asset (liability) recognized	(337)	(339)
Regulatory assets	570	531
Pension Plan | Progress Energy
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	501	463
Net asset (liability) recognized	(501)	(463)
Regulatory assets	711	678
Accumulated other comprehensive income (loss)
Deferred income tax benefit	(1)	(1)
Net actuarial gain	4	3
Net amounts recognized in accumulated other comprehensive income	3	2
Pension Plan | Duke Energy Progress
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	231	209
Net asset (liability) recognized	(231)	(209)
Regulatory assets	354	353
Pension Plan | Duke Energy Florida
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	263	247
Net asset (liability) recognized	(263)	(247)
Regulatory assets	356	325
Pension Plan | Duke Energy Ohio
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	74	74
Noncurrent pension liability	74	73
Net asset (liability) recognized		(1)
Regulatory assets	100	89
Pension Plan | Duke Energy Indiana
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	101	105
Noncurrent pension liability	74	87
Net asset (liability) recognized	(27)	(18)
Regulatory assets	182	176
Accumulated other comprehensive income (loss)
Net actuarial gain		2
Net amounts recognized in accumulated other comprehensive income		2
Pension Plan | Piedmont
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	33	38
Net asset (liability) recognized	(33)	(38)
Regulatory assets	113	97
Other Post-Retirement Benefit Plans
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	8	12
Noncurrent pension liability	165	179
Net asset (liability) recognized	173	191
Regulatory assets	81	123
Regulatory liabilities	154	230
Accumulated other comprehensive income (loss)
Deferred income tax expense	3	3
Net actuarial gain	(12)	(13)
Net amounts recognized in accumulated other comprehensive income	(9)	(10)
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	44	61
Current pension liability		3
Noncurrent pension liability		25
Net asset (liability) recognized	(44)	(33)
Regulatory assets	17	79
Regulatory liabilities	35	106
Other Post-Retirement Benefit Plans | Progress Energy
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	5	5
Noncurrent pension liability	142	142
Net asset (liability) recognized	147	147
Regulatory assets	62	39
Regulatory liabilities	12
Accumulated other comprehensive income (loss)
Net actuarial gain	(1)	(1)
Net amounts recognized in accumulated other comprehensive income	(1)	(1)
Other Post-Retirement Benefit Plans | Duke Energy Progress
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	3	3
Noncurrent pension liability	84	82
Net asset (liability) recognized	87	85
Regulatory assets	46	29
Regulatory liabilities	12
Other Post-Retirement Benefit Plans | Duke Energy Florida
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Current pension liability	2	2
Noncurrent pension liability	58	59
Net asset (liability) recognized	60	61
Regulatory assets	16	11
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	1	1
Current pension liability	1	1
Noncurrent pension liability	11	12
Net asset (liability) recognized	11	12
Regulatory assets	1	2
Regulatory liabilities	14	17
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Noncurrent pension liability	20	21
Net asset (liability) recognized	20	21
Regulatory assets	20	23
Regulatory liabilities	62	74
Other Post-Retirement Benefit Plans | Piedmont
Amounts Recognized in Consolidated Balance Sheets [Abstract]
Prefunded pension	14	12
Net asset (liability) recognized	(14)	(12)
Regulatory assets	$ 1	$ 1