Employee Benefit Plans (Employee Savings Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 257	$ 238	$ 246
Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	81	75	76
Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	72	62	65
Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	43	40	43
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	29	22	22
Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	6	6	6
Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	13	13	12
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 14	$ 13	$ 13