Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Line Items]
Alternative minimum tax	$ 133	$ 69
Net proceeds related to the sale of certain tax credits	558	28	$ 0
Duke Energy Carolinas
Income Tax Disclosure [Line Items]
Deferred tax asset	449
Tax credits	558
Net proceeds related to the sale of certain tax credits	440	0	0
Duke Energy Carolinas | Sale of Nuclear Power PTCs
Income Tax Disclosure [Line Items]
Increase (decrease) in deferred tax asset	428
Duke Energy Progress
Income Tax Disclosure [Line Items]
Deferred tax asset	73
Net proceeds related to the sale of certain tax credits	71	0	0
Duke Energy Progress | Sale of Nuclear Power PTCs
Income Tax Disclosure [Line Items]
Increase (decrease) in deferred tax asset	65
Duke Energy Florida
Income Tax Disclosure [Line Items]
Net proceeds related to the sale of certain tax credits	47	$ 28	$ 0
Duke Energy Florida | Sale of Nuclear Power PTCs
Income Tax Disclosure [Line Items]
Increase (decrease) in deferred tax asset	$ 43