Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 472	$ 434
Derivative Asset, Current	316	238
Net amounts presented in Current Assets: Other	114	130
Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	320	267
Offset	(1)	$ (29)
Cash collateral received	$ (3)
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 152	$ 167
Offset	(36)	$ (37)
Cash collateral received	$ (2)
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 159	$ 94
Derivative Asset, Current	98	24
Net amounts presented in Current Assets: Other	37	36
Duke Energy Carolinas \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	102	39
Offset	(1)	(15)
Cash collateral received	(3)
Duke Energy Carolinas \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	57	55
Offset	(18)	(19)
Cash collateral received	(2)
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	147	127
Derivative Asset, Current	89	58
Net amounts presented in Current Assets: Other	39	38
Progress Energy \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	90	72
Offset	(1)	(14)
Progress Energy \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	57	55
Offset	(18)	(17)
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	139	109
Derivative Asset, Current	85	47
Net amounts presented in Current Assets: Other	35	31
Duke Energy Progress \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	86	61
Offset	(1)	(14)
Duke Energy Progress \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	53	48
Offset	(18)	(17)
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	8	18
Derivative Asset, Current	4	11
Net amounts presented in Current Assets: Other	4	7
Duke Energy Florida \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	4	11
Offset	0	0
Duke Energy Florida \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	4	7
Offset	0	0
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	1
Derivative Asset, Current	1	1
Net amounts presented in Current Assets: Other	0	0
Duke Energy Ohio \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	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	53	44
Derivative Asset, Current	53	44
Net amounts presented in Current Assets: Other	0	0
Duke Energy Indiana \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	53	44
Offset	0	0
Duke Energy Indiana \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	1
Derivative Asset, Current	0	1
Net amounts presented in Current Assets: Other	0	0
Piedmont \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	1
Offset	0	0
Piedmont \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	0	0
Offset	$ 0	$ 0

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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