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Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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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

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