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Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Loss Contingencies [Line Items] |  |
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Other (includes $54 at 2023 related to VIEs) | Other (includes $54 at 2023 related to VIEs)
Environmental reserves |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | $ 73 | $ 88
Environmental reserves | Duke Energy Carolinas |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | 24 | 23
Environmental reserves | Progress Energy |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | 19 | 19
Environmental reserves | Duke Energy Progress |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | 9 | 9
Environmental reserves | Duke Energy Florida |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | 10 | 10
Environmental reserves | Duke Energy Ohio |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | 21 | 36
Environmental reserves | Duke Energy Indiana |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | 2 | 2
Environmental reserves | Piedmont |  |
Loss Contingencies [Line Items] |  |
Reserves for Environmental Remediation | $ 7 | $ 7

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