Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current income taxes
Federal(b)	$ 71	$ 1	$ (2)
State	1	(8)	1
Foreign	3	4	2
Total current income taxes	75	(3)	1
Deferred income taxes
Federal	319	328	275
State	53	(14)
Total deferred income taxes	372	314	275
ITC amortization	(9)	(11)	(8)
Income tax expense from continuing operations	438	300	268
Tax benefit from discontinued operations	(359)	(503)	(76)
Total income tax expense included in Consolidated Statements of Operations	79	(203)	192
Net operating loss carry forward	214	550	250
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Domestic	4,700	3,991	3,947
Foreign	67	87	44
Income from continuing operations before income taxes	4,767	4,078	3,991
Alternative minimum tax	69
Duke Energy Carolinas
Current income taxes
Federal(b)	173	(71)	241
State	22	(13)	23
Total current income taxes	195	(84)	264
Deferred income taxes
Federal	(43)	230	(130)
State	(7)	(16)	(79)
Total deferred income taxes	(50)	214	(209)
ITC amortization	(4)	(4)	(4)
Income tax expense from continuing operations	141	126	51
Total income tax expense included in Consolidated Statements of Operations	141	126	51
Net operating loss carry forward	2	97	32
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,611	1,726	1,387
Progress Energy
Current income taxes
Federal(b)	459	(13)	(15)
State	38	(3)	(4)
Total current income taxes	497	(16)	(19)
Deferred income taxes
Federal	(154)	310	203
State	38	59	47
Total deferred income taxes	(116)	369	250
ITC amortization	(4)	(5)	(4)
Income tax expense from continuing operations	377	348	227
Total income tax expense included in Consolidated Statements of Operations	377	348	227
Net operating loss carry forward	116	128	95
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	2,333	2,176	1,826
Duke Energy Progress
Current income taxes
Federal(b)	198	37	113
State	4		8
Total current income taxes	202	37	121
Deferred income taxes
Federal	(69)	118	(16)
State	19	7	(26)
Total deferred income taxes	(50)	125	(42)
ITC amortization	(3)	(4)	(4)
Income tax expense from continuing operations	149	158	75
Total income tax expense included in Consolidated Statements of Operations	149	158	75
Net operating loss carry forward	59	9	14
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,147	1,166	1,066
Duke Energy Florida
Current income taxes
Federal(b)	279	(37)	(75)
State	71	(23)	(17)
Total current income taxes	350	(60)	(92)
Deferred income taxes
Federal	(89)	201	202
State		84	77
Total deferred income taxes	(89)	285	279
Income tax expense from continuing operations	261	225	187
Total income tax expense included in Consolidated Statements of Operations	261	225	187
Net operating loss carry forward	5	111	64
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,277	1,134	925
Proceeds from sale of PTCs	28
Duke Energy Ohio
Current income taxes
Federal(b)	(46)	(2)	(8)
State	(3)	1	(2)
Total current income taxes	(49)	(1)	(10)
Deferred income taxes
Federal	111	(22)	35
State	1	3	5
Total deferred income taxes	112	(19)	40
ITC amortization		(1)
Income tax expense from continuing operations	63	(21)	30
Total income tax expense included in Consolidated Statements of Operations	63	(21)	30
Net operating loss carry forward	22	7	2
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	397	281	234
Duke Energy Indiana
Current income taxes
Federal(b)	10	38	65
State	9	2	7
Total current income taxes	19	40	72
Deferred income taxes
Federal	77	(63)	19
State	14		16
Total deferred income taxes	91	(63)	35
ITC amortization		(1)
Income tax expense from continuing operations	110	(24)	107
Total income tax expense included in Consolidated Statements of Operations	110	(24)	107
Net operating loss carry forward	54	13	8
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	607	113	588
Piedmont
Current income taxes
Federal(b)	44	32	23
State	3	2	3
Total current income taxes	47	34	26
Deferred income taxes
Federal	25	12	17
State	12	(7)	(13)
Total deferred income taxes	37	5	4
Income tax expense from continuing operations	84	39	30
Total income tax expense included in Consolidated Statements of Operations	84	39	30
Net operating loss carry forward	15	12	3
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	$ 463	$ 362	$ 340