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Summary of Significant Accounting Policies (Other Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Duke Energy Carolinas | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Accrued compensation | $ 224 | $ 247
Duke Energy Florida | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer deposits/Collateral liabilities | 168 | 200
Duke Energy Ohio | Current Assets |  |
Organization And Basis Of Presentation [Line Items] |  |
Gas Storage | 23 | 57
Tax receivables | 95 | 4
Duke Energy Indiana | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer advances | 87 | 51
Duke Energy Indiana | Current Assets |  |
Organization And Basis Of Presentation [Line Items] |  |
Mark-to-market transactions | $ 18 | $ 110

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