Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current income taxes
Federal	$ (365)	$ 71	$ 1
State	31	1	(8)
Foreign	2	3	4
Total current income taxes	(332)	75	(3)
Deferred income taxes
Federal	858	319	328
State	81	53	(14)
Total deferred income taxes	939	372	314
ITC amortization	(17)	(9)	(11)
Income tax expense from continuing operations	590	438	300
Tax benefit from discontinued operations	(50)	(359)	(503)
Total income tax expense included in Consolidated Statements of Operations	540	79	(203)
Net operating loss carry forward	523	214	550
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Domestic	5,145	4,700	3,991
Foreign	49	67	87
Income from continuing operations before income taxes	5,194	4,767	4,078
Alternative minimum tax	133	69
Duke Energy Carolinas
Current income taxes
Federal	178	173	(71)
State	75	22	(13)
Total current income taxes	253	195	(84)
Deferred income taxes
Federal	10	(43)	230
State	(25)	(7)	(16)
Total deferred income taxes	(15)	(50)	214
ITC amortization	(12)	(4)	(4)
Income tax expense from continuing operations	226	141	126
Total income tax expense included in Consolidated Statements of Operations	226	141	126
Net operating loss carry forward	47	2	97
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	2,109	1,611	1,726
Progress Energy
Current income taxes
Federal	359	459	(13)
State	34	38	(3)
Total current income taxes	393	497	(16)
Deferred income taxes
Federal	(22)	(154)	310
State	59	38	59
Total deferred income taxes	37	(116)	369
ITC amortization	(4)	(4)	(5)
Income tax expense from continuing operations	426	377	348
Total income tax expense included in Consolidated Statements of Operations	426	377	348
Net operating loss carry forward	85	116	128
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	2,597	2,333	2,176
Duke Energy Progress
Current income taxes
Federal	373	198	37
State	40	4
Total current income taxes	413	202	37
Deferred income taxes
Federal	(215)	(69)	118
State	(6)	19	7
Total deferred income taxes	(221)	(50)	125
ITC amortization	(3)	(3)	(4)
Income tax expense from continuing operations	189	149	158
Total income tax expense included in Consolidated Statements of Operations	189	149	158
Net operating loss carry forward	66	59	9
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,353	1,147	1,166
Proceeds from sale of PTCs		28
Duke Energy Florida
Current income taxes
Federal	14	279	(37)
State	(12)	71	(23)
Total current income taxes	2	350	(60)
Deferred income taxes
Federal	181	(89)	201
State	86		84
Total deferred income taxes	267	(89)	285
ITC amortization	(1)
Income tax expense from continuing operations	268	261	225
Total income tax expense included in Consolidated Statements of Operations	268	261	225
Net operating loss carry forward	30	5	111
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,329	1,277	1,134
Proceeds from sale of PTCs		28
Duke Energy Ohio
Current income taxes
Federal	52	(46)	(2)
State	3	(3)	1
Total current income taxes	55	(49)	(1)
Deferred income taxes
Federal	8	111	(22)
State	1	1	3
Total deferred income taxes	9	112	(19)
ITC amortization			(1)
Income tax expense from continuing operations	64	63	(21)
Total income tax expense included in Consolidated Statements of Operations	64	63	(21)
Net operating loss carry forward	26	22	7
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	405	397	281
Duke Energy Indiana
Current income taxes
Federal	70	10	38
State	12	9	2
Total current income taxes	82	19	40
Deferred income taxes
Federal	(19)	77	(63)
State	8	14
Total deferred income taxes	(11)	91	(63)
ITC amortization			(1)
Income tax expense from continuing operations	71	110	(24)
Total income tax expense included in Consolidated Statements of Operations	71	110	(24)
Net operating loss carry forward	8	54	13
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	512	607	113
Piedmont
Current income taxes
Federal	40	44	32
State	(6)	3	2
Total current income taxes	34	47	34
Deferred income taxes
Federal	40	25	12
State	21	12	(7)
Total deferred income taxes	61	37	5
Income tax expense from continuing operations	95	84	39
Total income tax expense included in Consolidated Statements of Operations	95	84	39
Net operating loss carry forward	8	15	12
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	$ 508	$ 463	$ 362