Income Taxes (Effective Tax Rates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%	$ 1,090	$ 1,001	$ 856
State income tax, net of federal income tax effect	88	43	(17)
Amortization of EDIT	(436)	(388)	(481)
AFUDC equity income	(48)	(41)	(41)
AFUDC equity depreciation	38	37	36
Production tax credits	(46)
Other tax credits	(43)	(63)	(43)
Valuation allowance		(114)
Other items, net	(53)	(37)	(10)
Income tax expense from continuing operations	$ 590	$ 438	$ 300
Effective tax rate (as a percent)	11.40%	9.20%	7.40%
Domestic Tax Jurisdiction
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Favorable adjustment amounts		$ 114
State
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Favorable adjustment amounts		6
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]
Income tax expense, computed at the statutory rate of 21%	$ 443	338	$ 362
State income tax, net of federal income tax effect	40	12	(23)
Amortization of EDIT	(225)	(197)	(195)
AFUDC equity income	(24)	(19)	(20)
AFUDC equity depreciation	19	18	18
Other tax credits	(23)	(11)	(12)
Other items, net	(4)		(4)
Income tax expense from continuing operations	$ 226	$ 141	$ 126
Effective tax rate (as a percent)	10.70%	8.80%	7.30%
Progress Energy
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%	$ 545	$ 490	$ 457
State income tax, net of federal income tax effect	73	60	44
Amortization of EDIT	(121)	(114)	(133)
AFUDC equity income	(16)	(14)	(14)
AFUDC equity depreciation	14	13	12
Production tax credits	(46)
Other tax credits	(16)	(46)	(16)
Other items, net	(7)	(12)	(2)
Income tax expense from continuing operations	$ 426	$ 377	$ 348
Effective tax rate (as a percent)	16.40%	16.20%	16.00%
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]
Income tax expense, computed at the statutory rate of 21%	$ 284	$ 241	$ 245
State income tax, net of federal income tax effect	27	18	6
Amortization of EDIT	(98)	(91)	(74)
AFUDC equity income	(13)	(11)	(11)
AFUDC equity depreciation	7	6	6
Other tax credits	(12)	(7)	(9)
Other items, net	(6)	(7)	(5)
Income tax expense from continuing operations	$ 189	$ 149	$ 158
Effective tax rate (as a percent)	14.00%	13.00%	13.60%
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]
Income tax expense, computed at the statutory rate of 21%	$ 279	$ 268	$ 238
State income tax, net of federal income tax effect	58	56	48
Amortization of EDIT	(23)	(23)	(59)
AFUDC equity income	(3)	(3)	(3)
AFUDC equity depreciation	7	7	6
Production tax credits	(46)
Other tax credits	(4)	(39)	(7)
Other items, net		(5)	2
Income tax expense from continuing operations	$ 268	$ 261	$ 225
Effective tax rate (as a percent)	20.20%	20.40%	19.80%
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]
Income tax expense, computed at the statutory rate of 21%	$ 85	$ 83	$ 59
State income tax, net of federal income tax effect	3	(2)	3
Amortization of EDIT	(23)	(22)	(79)
AFUDC equity income	(1)	(2)	(1)
AFUDC equity depreciation	2	2	1
Other tax credits	(1)	(2)	(2)
Other items, net	(1)	6	(2)
Income tax expense from continuing operations	$ 64	$ 63	$ (21)
Effective tax rate (as a percent)	15.80%	15.90%	(7.50%)
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]
Income tax expense, computed at the statutory rate of 21%	$ 108	$ 128	$ 24
State income tax, net of federal income tax effect	16	18	2
Amortization of EDIT	(49)	(33)	(48)
AFUDC equity income	(3)	(2)	(2)
AFUDC equity depreciation	4	4	4
Other tax credits	(2)	(2)	(3)
Other items, net	(3)	(3)	(1)
Income tax expense from continuing operations	$ 71	$ 110	$ (24)
Effective tax rate (as a percent)	13.90%	18.10%	(21.20%)
Piedmont
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Income tax expense, computed at the statutory rate of 21%	$ 107	$ 97	$ 76
State income tax, net of federal income tax effect	12	12	(4)
Amortization of EDIT	(18)	(20)	(23)
AFUDC equity income	(4)	(4)	(2)
Other tax credits	(2)	(1)	(8)
Income tax expense from continuing operations	$ 95	$ 84	$ 39
Effective tax rate (as a percent)	18.70%	18.10%	10.80%