Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations attributable to Duke Energy Corporation		$ (3)
Discontinued Operations, Held-for-sale \| Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	$ 4	(6)
Operation, maintenance and other	1	4
Interest expense	0	2
Loss (Gain) on disposal	4	(10)
Loss before income taxes	(1)	(2)
Income tax (benefit) expense	(1)	1
Net loss from discontinued operations attributable to Duke Energy Corporation	$ 0	$ (3)

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