Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 382	$ 434
Net amounts presented in Current Assets: Other	100	238
Net amounts presented in Other Noncurrent Assets: Other	$ 244	$ 130
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Foreign Currency Contracts
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 156	$ 5
Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	116	267
Offset	(16)	(29)
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	266	167
Offset	(22)	(37)
Noncurrent assets \| Foreign Currency Contracts
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	156
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	101	94
Net amounts presented in Current Assets: Other	34	24
Net amounts presented in Other Noncurrent Assets: Other	$ 47	$ 36
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Duke Energy Carolinas \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 43	$ 39
Offset	(9)	(15)
Duke Energy Carolinas \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	58	55
Offset	(11)	(19)
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	67	127
Net amounts presented in Current Assets: Other	29	58
Net amounts presented in Other Noncurrent Assets: Other	$ 20	$ 38
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Progress Energy \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 36	$ 72
Offset	(7)	(14)
Progress Energy \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	31	55
Offset	(11)	(17)
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	52	109
Net amounts presented in Current Assets: Other	29	47
Net amounts presented in Other Noncurrent Assets: Other	$ 5	$ 31
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Duke Energy Progress \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 36	$ 61
Offset	(7)	(14)
Duke Energy Progress \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	16	48
Offset	(11)	(17)
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	15	18
Net amounts presented in Current Assets: Other	1	11
Net amounts presented in Other Noncurrent Assets: Other	$ 14	$ 7
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)	Other (including amounts related to VIEs)
Duke Energy Florida \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 1	$ 11
Duke Energy Florida \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	14	7
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		1
Net amounts presented in Current Assets: Other		$ 1
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]		Current Assets: Other
Duke Energy Ohio \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		$ 1
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	12	44
Net amounts presented in Current Assets: Other	11	$ 44
Net amounts presented in Other Noncurrent Assets: Other	$ 1
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other (including amounts related to VIEs)
Duke Energy Indiana \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 11	$ 44
Duke Energy Indiana \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 1
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		1
Net amounts presented in Current Assets: Other		$ 1
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]		Current Assets: Other
Piedmont \| Current Assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		$ 1

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