Severance (Expenses) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) employee	Dec. 31, 2021 USD ($) employee	Dec. 31, 2020 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Number of eligible employees | employee	233	290	30
Severance expense	$ 65	$ 69	$ (85)
Amortization of deferred severance charges	33	33
Severance charges adjustments	(19)	(3)	(6)
Unamortized deferred severance			(86)
Duke Energy Carolinas
Restructuring Cost and Reserve [Line Items]
Severance expense	40	33	(58)
Amortization of deferred severance charges	22	22
Severance charges adjustments	(6)	(2)	(2)
Unamortized deferred severance			(57)
Progress Energy
Restructuring Cost and Reserve [Line Items]
Severance expense	20	26	(28)
Amortization of deferred severance charges	11	11
Severance charges adjustments	(8)		(3)
Unamortized deferred severance			(29)
Duke Energy Progress
Restructuring Cost and Reserve [Line Items]
Severance expense	17	20	(31)
Amortization of deferred severance charges	11	11
Severance charges adjustments	(4)		(2)
Unamortized deferred severance			(29)
Duke Energy Florida
Restructuring Cost and Reserve [Line Items]
Severance expense	3	6	3
Severance charges adjustments	(4)
Duke Energy Ohio
Restructuring Cost and Reserve [Line Items]
Severance expense	1	2
Severance charges adjustments	(1)
Duke Energy Indiana
Restructuring Cost and Reserve [Line Items]
Severance expense	2	3	0
Severance charges adjustments	(2)	(1)
Piedmont
Restructuring Cost and Reserve [Line Items]
Severance expense	2	$ 2	$ 0
Severance charges adjustments	$ (1)