Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 437	$ 328
Net amounts presented in Current Liabilities: Other	144	146
Net amounts presented in Other Noncurrent Liabilities: Other	185	159
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	193	157
Gross amounts offset	$ (49)	$ (11)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 244	$ 171
Gross amounts offset	$ (59)	$ (12)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other (includes amounts related to VIEs)	Other (includes amounts related to VIEs)
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 127	$ 35
Net amounts presented in Current Liabilities: Other	81	20
Net amounts presented in Other Noncurrent Liabilities: Other	2	1
Duke Energy Carolinas \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	96	26
Gross amounts offset	(15)	(6)
Duke Energy Carolinas \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	31	9
Gross amounts offset	(29)	(8)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	66	24
Net amounts presented in Current Liabilities: Other	18	14
Progress Energy \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	36	19
Gross amounts offset	(18)	(5)
Progress Energy \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	30	5
Gross amounts offset	(30)	(5)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	48	10
Duke Energy Progress \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	18	5
Gross amounts offset	(18)	(5)
Duke Energy Progress \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	30	5
Gross amounts offset	(30)	(5)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	19	14
Net amounts presented in Current Liabilities: Other	19	14
Duke Energy Florida \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	19	14
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	5
Net amounts presented in Current Liabilities: Other		1
Net amounts presented in Other Noncurrent Liabilities: Other	2	4
Duke Energy Ohio \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		1
Duke Energy Ohio \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	4
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	16	27
Net amounts presented in Current Liabilities: Other		13
Net amounts presented in Other Noncurrent Liabilities: Other		14
Duke Energy Indiana \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	16	13
Gross amounts offset	(16)
Duke Energy Indiana \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		14
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	168	139
Net amounts presented in Current Liabilities: Other	27	21
Net amounts presented in Other Noncurrent Liabilities: Other	141	118
Piedmont \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	27	21
Piedmont \| Noncurrent Liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 141	$ 118

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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