Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 255	$ 189
Derivative Asset, Current	94	59
Net amounts presented in Current Assets: Other	129	91
Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	95	61
Offset	$ (1)	$ (2)
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 160	$ 128
Offset	$ (31)	$ (37)
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 35	$ 35
Derivative Asset, Current	0	5
Net amounts presented in Current Assets: Other	23	15
Duke Energy Carolinas \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	6
Offset	(1)	(1)
Duke Energy Carolinas \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	34	29
Offset	(11)	(14)
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	57	34
Derivative Asset, Current	10	2
Net amounts presented in Current Assets: Other	26	9
Progress Energy \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	11	3
Offset	(1)	(1)
Progress Energy \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	46	31
Offset	(20)	(22)
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	47	32
Derivative Asset, Current	0	0
Net amounts presented in Current Assets: Other	26	9
Duke Energy Progress \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	1
Offset	(1)	(1)
Duke Energy Progress \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	46	31
Offset	(20)	(22)
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	10	2
Derivative Asset, Current	10	2
Net amounts presented in Current Assets: Other	0	0
Duke Energy Florida \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	10	2
Offset	0	0
Duke Energy Florida \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	1
Derivative Asset, Current	0	1
Net amounts presented in Current Assets: Other	0	0
Duke Energy Ohio \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	1
Offset	0	0
Duke Energy Ohio \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	24	25
Derivative Asset, Current	7	18
Net amounts presented in Current Assets: Other	17	7
Duke Energy Indiana \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	7	18
Offset	0	0
Duke Energy Indiana \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	17	7
Offset	0	0
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	1
Derivative Asset, Current	1	1
Net amounts presented in Current Assets: Other	0	0
Piedmont \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	1
Offset	0	0
Piedmont \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	$ 0	$ 0

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Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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