Property, Plant and Equipment (Schedule of Capitalized Interest) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Capitalized interest	$ 201	$ 118	$ 66
Duke Energy Carolinas
Property, Plant and Equipment [Line Items]
Capitalized interest	62	50	29
Progress Energy
Property, Plant and Equipment [Line Items]
Capitalized interest	41	26	20
Duke Energy Progress
Property, Plant and Equipment [Line Items]
Capitalized interest	35	19	14
Duke Energy Florida
Property, Plant and Equipment [Line Items]
Capitalized interest	6	7	6
Duke Energy Ohio
Property, Plant and Equipment [Line Items]
Capitalized interest	16	14	20
Duke Energy Indiana
Property, Plant and Equipment [Line Items]
Capitalized interest	21	3
PISCC amortization			17
Duke Energy Indiana | PISCC Amortization
Property, Plant and Equipment [Line Items]
PISCC amortization			24
Duke Energy Indiana | Debt Component of AFUDC
Property, Plant and Equipment [Line Items]
Capitalized interest			7
Piedmont
Property, Plant and Equipment [Line Items]
Capitalized interest	$ 8	$ 4	$ 9