Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 272	$ 319
Net amounts presented in Current Liabilities: Other	103	113
Net amounts presented in Other Noncurrent Liabilities: Other	132	133
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	104	145
Offset	$ (1)	(29)
Cash collateral posted		$ (3)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 168	$ 174
Offset	$ (36)	(37)
Cash collateral posted		$ (4)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 64	$ 88
Net amounts presented in Current Liabilities: Other	31	40
Net amounts presented in Other Noncurrent Liabilities: Other	14	8
Duke Energy Carolinas \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	32	57
Offset	(1)	(15)
Cash collateral posted		(2)
Duke Energy Carolinas \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	32	31
Offset	(18)	(19)
Cash collateral posted		(4)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	37	58
Net amounts presented in Current Liabilities: Other	9	20
Net amounts presented in Other Noncurrent Liabilities: Other	9	7
Progress Energy \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	10	34
Offset	(1)	(14)
Cash collateral posted		0
Progress Energy \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	27	24
Offset	(18)	(17)
Cash collateral posted		0
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	25	57
Net amounts presented in Current Liabilities: Other	0	19
Net amounts presented in Other Noncurrent Liabilities: Other	6	7
Duke Energy Progress \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	33
Offset	(1)	(14)
Cash collateral posted		0
Duke Energy Progress \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	24	24
Offset	(18)	(17)
Cash collateral posted		0
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	13	1
Net amounts presented in Current Liabilities: Other	9	1
Net amounts presented in Other Noncurrent Liabilities: Other	4	0
Duke Energy Florida \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	9	1
Offset	0	0
Cash collateral posted		0
Duke Energy Florida \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	4	0
Offset	0	0
Cash collateral posted		0
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Net amounts presented in Current Liabilities: Other	0	0
Net amounts presented in Other Noncurrent Liabilities: Other	1	1
Duke Energy Ohio \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Cash collateral posted		0
Duke Energy Ohio \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Offset	0	0
Cash collateral posted		0
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3	3
Net amounts presented in Current Liabilities: Other	0	2
Net amounts presented in Other Noncurrent Liabilities: Other	3	0
Duke Energy Indiana \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	3
Offset	0	0
Cash collateral posted		(1)
Duke Energy Indiana \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3	0
Offset	0	0
Cash collateral posted		0
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	108	94
Net amounts presented in Current Liabilities: Other	22	16
Net amounts presented in Other Noncurrent Liabilities: Other	86	78
Piedmont \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	22	16
Offset	0	0
Cash collateral posted		0
Piedmont \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	86	78
Offset	$ 0	0
Cash collateral posted		$ 0

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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