Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 319	$ 729
Net amounts presented in Current Liabilities: Other	113	311
Net amounts presented in Other Noncurrent Liabilities: Other	133	217
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	145	409
Offset	(29)	(2)
Cash collateral posted	$ (3)	$ (96)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 174	$ 320
Offset	(37)	(37)
Cash collateral posted	$ (4)	$ (66)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other (includes $54 at 2023 related to VIEs)	Other (includes $54 at 2023 related to VIEs)
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 88	$ 260
Net amounts presented in Current Liabilities: Other	40	130
Net amounts presented in Other Noncurrent Liabilities: Other	8	29
Duke Energy Carolinas \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	57	179
Offset	(15)	(1)
Cash collateral posted	(2)	(48)
Duke Energy Carolinas \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	31	81
Offset	(19)	(14)
Cash collateral posted	(4)	(38)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	58	234
Net amounts presented in Current Liabilities: Other	20	118
Net amounts presented in Other Noncurrent Liabilities: Other	7	35
Progress Energy \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	34	149
Offset	(14)	(1)
Cash collateral posted		(30)
Progress Energy \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	24	85
Offset	(17)	(22)
Cash collateral posted		(28)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	57	219
Net amounts presented in Current Liabilities: Other	19	118
Net amounts presented in Other Noncurrent Liabilities: Other	7	20
Duke Energy Progress \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	33	149
Offset	(14)	(1)
Cash collateral posted		(30)
Duke Energy Progress \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	24	70
Offset	(17)	(22)
Cash collateral posted		(28)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	15
Net amounts presented in Current Liabilities: Other	1
Net amounts presented in Other Noncurrent Liabilities: Other		15
Duke Energy Florida \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1
Duke Energy Florida \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		15
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Net amounts presented in Other Noncurrent Liabilities: Other	1	1
Duke Energy Ohio \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3	18
Net amounts presented in Current Liabilities: Other	2
Duke Energy Indiana \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3	18
Cash collateral posted	(1)	(18)
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	94	147
Net amounts presented in Current Liabilities: Other	16	20
Net amounts presented in Other Noncurrent Liabilities: Other	78	127
Piedmont \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	16	20
Piedmont \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 78	$ 127

Fair value, before effects of master netting arrangements, of a financial liability or 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. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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