Business Segments (Narrative) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) segment Segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment									2
Operating Revenues	$ 7,212	$ 7,994	$ 6,578	$ 7,276	$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 29,060	$ 28,768	$ 24,621
Duke Energy Progress
Segment Reporting Information [Line Items]
Operating Revenues									$ 6,488	6,753	5,780
Duke Energy Ohio
Segment Reporting Information [Line Items]
Number of reportable segments | segment									2
Operating Revenues									$ 2,507	$ 2,514	$ 2,037