Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 473	$ 729
Net amounts presented in Current Liabilities: Other	225	311
Net amounts presented in Other Noncurrent Liabilities: Other	180	217
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	249	409
Offset	(8)	(2)
Cash collateral posted	$ (16)	$ (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	$ 224	$ 320
Offset	(35)	(37)
Cash collateral posted	$ (9)	$ (66)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 161	$ 260
Net amounts presented in Current Liabilities: Other	103	130
Net amounts presented in Other Noncurrent Liabilities: Other	22	29
Duke Energy Carolinas \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	114	179
Offset	(4)	(1)
Cash collateral posted	(7)	(48)
Duke Energy Carolinas \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	47	81
Offset	(17)	(14)
Cash collateral posted	(8)	(38)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	119	234
Net amounts presented in Current Liabilities: Other	72	118
Net amounts presented in Other Noncurrent Liabilities: Other	22	35
Progress Energy \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	77	149
Offset	(4)	(1)
Cash collateral posted	(1)	(30)
Progress Energy \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	42	85
Offset	(19)	(22)
Cash collateral posted	(1)	(28)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	118	219
Net amounts presented in Current Liabilities: Other	72	118
Net amounts presented in Other Noncurrent Liabilities: Other	21	20
Duke Energy Progress \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	77	149
Offset	(4)	(1)
Cash collateral posted	(1)	(30)
Duke Energy Progress \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	41	70
Offset	(19)	(22)
Cash collateral posted	(1)	(28)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	15
Net amounts presented in Current Liabilities: Other	0	0
Net amounts presented in Other Noncurrent Liabilities: Other	2	15
Duke Energy Florida \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Cash collateral posted	0	0
Duke Energy Florida \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	15
Offset	0	0
Cash collateral posted	0	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	0
Duke Energy Ohio \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Offset	0	0
Cash collateral posted	0	0
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	8	18
Net amounts presented in Current Liabilities: Other	0	0
Net amounts presented in Other Noncurrent Liabilities: Other	0	0
Duke Energy Indiana \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	8	18
Offset	0	0
Cash collateral posted	(8)	(18)
Duke Energy Indiana \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	0	0
Offset	0	0
Cash collateral posted	0	0
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	132	147
Net amounts presented in Current Liabilities: Other	19	20
Net amounts presented in Other Noncurrent Liabilities: Other	113	127
Piedmont \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	19	20
Offset	0	0
Cash collateral posted	0	0
Piedmont \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	113	127
Offset	0	0
Cash collateral posted	$ 0	$ 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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