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Commitments and Contingencies (Narrative) (Details) $ in Millions | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($) | Feb. 28, 2021 case
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Texas Storm Uri Tort Litigation | Pending Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims, number | case |  |  | 5
Duke Energy Carolinas | Asbestos-related Injuries and Damages Claims |  |  |
Loss Contingencies [Line Items] |  |  |
Asbestos-related injuries and damages reserves | $ 410 | $ 423 |
Probable insurance recoveries | 572 | 572 |
Duke Energy and Duke Energy Carolinas | ASU 2016-13 |  |  |
Loss Contingencies [Line Items] |  |  |
Reserve for credit losses for insurance receivables | $ 9 | $ 9 |

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