Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) $ in Billions					9 Months Ended
	Sep. 27, 2021 contention	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Sep. 30, 2022	Nov. 02, 2022 USD ($)
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
Duke Energy Carolinas | 2023 North Carolina Rate Case | Subsequent event
Public Utilities, General Disclosures [Line Items]
Planned transmission and distribution of capital spending | $						$ 4
Duke Energy Carolinas | Nuclear Regulatory Commission | Oconee Nuclear Station Subsequent License Renewal
Public Utilities, General Disclosures [Line Items]
Comment period (in days)		60 days
Number of contentions | contention	3
Duke Energy Carolinas | Nuclear Regulatory Commission | Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
Operating license (in years)			80 years	60 years