Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other (includes amounts related to VIEs)	Other (includes amounts related to VIEs)
Environmental reserves
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	$ 84	$ 88
Environmental reserves | Duke Energy Carolinas
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	22	19
Environmental reserves | Progress Energy
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	19	23
Environmental reserves | Duke Energy Progress
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	8	11
Environmental reserves | Duke Energy Florida
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	11	11
Environmental reserves | Duke Energy Ohio
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	33	34
Environmental reserves | Duke Energy Indiana
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	3	4
Environmental reserves | Piedmont
Loss Contingencies [Line Items]
Reserves for Environmental Remediation	$ 7	$ 9