Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	$ (152)	$ 3	$ (1,316)	$ (30)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(38)	20	33	92
Net (loss) income from discontinued operations attributable to Duke Energy Corporation	(190)	23	(1,283)	62
Discontinued Operations, Held-for-sale | Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	103	129	293	372
Operation, maintenance and other	93	85	270	248
Depreciation and amortization	0	65	0	193
Property and other taxes	8	10	27	31
Other income and expenses, net	(2)	(1)	(9)	(4)
Interest expense	10	18	53	55
Loss on disposal	169	0	1,603	0
Loss before income taxes	(179)	(50)	(1,669)	(159)
Income tax benefit	(27)	(30)	(353)	(106)
Loss from discontinued operations	(152)	(20)	(1,316)	(53)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations	(38)	20	33	92
Net (loss) income from discontinued operations attributable to Duke Energy Corporation	$ (190)	$ 0	$ (1,283)	$ 39