Severance (Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Severance expense	$ (28)	$ 102	$ 65
Amortization of deferred severance charges		22	33
Operation, maintenance and other
Restructuring Cost and Reserve [Line Items]
Severance expense		97
Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(6)		(19)
Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(1)	(14)
Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(27)
Duke Energy Carolinas
Restructuring Cost and Reserve [Line Items]
Severance expense	(11)	53	40
Amortization of deferred severance charges		14	22
Duke Energy Carolinas | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(2)		(6)
Duke Energy Carolinas | Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(1)	(7)
Duke Energy Carolinas | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(11)
Progress Energy
Restructuring Cost and Reserve [Line Items]
Severance expense	(9)	33	20
Amortization of deferred severance charges		8	11
Progress Energy | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(3)		(8)
Progress Energy | Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments		(5)
Progress Energy | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(9)
Duke Energy Progress
Restructuring Cost and Reserve [Line Items]
Severance expense	(5)	21	17
Amortization of deferred severance charges		8	11
Duke Energy Progress | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(2)		(4)
Duke Energy Progress | Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments		(3)
Duke Energy Progress | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(5)
Duke Energy Florida
Restructuring Cost and Reserve [Line Items]
Severance expense	(4)	12	3
Duke Energy Florida | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(1)		(4)
Duke Energy Florida | Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments		(2)
Duke Energy Florida | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(4)
Duke Energy Ohio
Restructuring Cost and Reserve [Line Items]
Severance expense	(2)	3	1
Duke Energy Ohio | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments			(1)
Duke Energy Ohio | Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments		(1)
Duke Energy Ohio | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(2)
Duke Energy Indiana
Restructuring Cost and Reserve [Line Items]
Severance expense	(4)	6	2
Duke Energy Indiana | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(1)		(2)
Duke Energy Indiana | Employee Severance Charges, 2022
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments		(1)
Duke Energy Indiana | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	(4)
Piedmont
Restructuring Cost and Reserve [Line Items]
Severance expense	(2)	$ 4	2
Piedmont | Employee Severance Charges, 2021
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments			$ (1)
Piedmont | Employee Severance Charges, 2023
Restructuring Cost and Reserve [Line Items]
Severance charges adjustments	$ (2)