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Summary of Significant Accounting Policies (Other Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Duke Energy Carolinas | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Accrued compensation | $ 234 | $ 224
Duke Energy Florida | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer deposits/Collateral liabilities | 164 | 168
Duke Energy Florida | Current Assets |  |
Organization And Basis Of Presentation [Line Items] |  |
Tax receivables | 166 | 12
Duke Energy Ohio | Current Assets |  |
Organization And Basis Of Presentation [Line Items] |  |
Tax receivables | 4 | 95
Duke Energy Indiana | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer advances | $ 100 | $ 87

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