Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current income taxes
Federal	$ 1	$ (2)	$ (281)
State	(8)	1	(3)
Foreign	4	2	1
Total current income taxes	(3)	1	(283)
Deferred income taxes
Federal	328	275	222
State	(14)		(98)
Total deferred income taxes	314	275	124
ITC amortization	(11)	(8)	(10)
Income tax expense from continuing operations	300	268	(169)
Tax benefit from discontinued operations	(503)	(76)	(65)
Total income tax (benefit) expense included in Consolidated Statements of Operations	(203)	192	(234)
Net operating loss carry forward	550	250	189
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Domestic	3,991	3,947	907
Foreign	87	44	13
Income from continuing operations before income taxes	4,078	3,991	920
Duke Energy Carolinas
Current income taxes
Federal	(71)	241	314
State	(13)	23	35
Total current income taxes	(84)	264	349
Deferred income taxes
Federal	230	(130)	(171)
State	(16)	(79)	(86)
Total deferred income taxes	214	(209)	(257)
ITC amortization	(4)	(4)	(4)
Income tax expense from continuing operations	126	51	88
Total income tax (benefit) expense included in Consolidated Statements of Operations	126	51	88
Net operating loss carry forward	97	32	20
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,726	1,387	1,044
Progress Energy
Current income taxes
Federal	(13)	(15)	280
State	(3)	(4)	29
Total current income taxes	(16)	(19)	309
Deferred income taxes
Federal	310	203	(167)
State	59	47	(24)
Total deferred income taxes	369	250	(191)
ITC amortization	(5)	(4)	(5)
Income tax expense from continuing operations	348	227	113
Total income tax (benefit) expense included in Consolidated Statements of Operations	348	227	113
Net operating loss carry forward	128	95	39
Duke Energy Progress
Current income taxes
Federal	37	113	181
State		8	17
Total current income taxes	37	121	198
Deferred income taxes
Federal	118	(16)	(180)
State	7	(26)	(49)
Total deferred income taxes	125	(42)	(229)
ITC amortization	(4)	(4)	(5)
Income tax expense from continuing operations	158	75	(36)
Total income tax (benefit) expense included in Consolidated Statements of Operations	158	75	(36)
Net operating loss carry forward	9	14	3
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,166	1,066	379
Duke Energy Florida
Current income taxes
Federal	(37)	(75)	148
State	(23)	(17)	24
Total current income taxes	(60)	(92)	172
Deferred income taxes
Federal	201	202	1
State	84	77	25
Total deferred income taxes	285	279	26
Income tax expense from continuing operations	225	187	198
Total income tax (benefit) expense included in Consolidated Statements of Operations	225	187	198
Net operating loss carry forward	111	64	30
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	1,134	925	969
Duke Energy Ohio
Current income taxes
Federal	(2)	(8)	10
State	1	(2)	1
Total current income taxes	(1)	(10)	11
Deferred income taxes
Federal	(22)	35	30
State	3	5	2
Total deferred income taxes	(19)	40	32
ITC amortization	(1)
Income tax expense from continuing operations	(21)	30	43
Total income tax (benefit) expense included in Consolidated Statements of Operations	(21)	30	43
Net operating loss carry forward	7	2
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	281	234	295
Duke Energy Indiana
Current income taxes
Federal	38	65	48
State	2	7	7
Total current income taxes	40	72	55
Deferred income taxes
Federal	(63)	19	12
State		16	17
Total deferred income taxes	(63)	35	29
ITC amortization	(1)
Income tax expense from continuing operations	(24)	107	84
Total income tax (benefit) expense included in Consolidated Statements of Operations	(24)	107	84
Net operating loss carry forward	13	8	8
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	113	588	492
Piedmont
Current income taxes
Federal	32	23	(27)
State	2	3	(8)
Total current income taxes	34	26	(35)
Deferred income taxes
Federal	12	17	60
State	(7)	(13)	(7)
Total deferred income taxes	5	4	53
Income tax expense from continuing operations	39	30	18
Total income tax (benefit) expense included in Consolidated Statements of Operations	39	30	18
Net operating loss carry forward	12	3	11
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]
Income from continuing operations before income taxes	$ 362	$ 340	$ 291