Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) From Discontinued Operations, net of tax	$ 0	$ 25	$ (1)	$ 12
Add: Net income attributable to noncontrolling interest included in discontinued operations	0	(3)	0	(3)
Net income (loss) from discontinued operations attributable to Duke Energy Corporation	$ 0	22	(1)	9
Discontinued Operations, Held-for-sale \| Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues		2	4	9
Operation, maintenance and other		3	1	19
Property and other taxes		0	0	1
Interest expense		1	0	3
Loss on disposal		17	4	22
Loss before income taxes		(19)	(1)	(36)
Income tax benefit		(44)	0	(48)
Income (Loss) From Discontinued Operations, net of tax		25	(1)	12
Add: Net income attributable to noncontrolling interest included in discontinued operations		(3)	0	(3)
Net income (loss) from discontinued operations attributable to Duke Energy Corporation		$ 22	$ (1)	$ 9

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