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Summary of Significant Accounting Policies (Other Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Duke Energy Carolinas | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Accrued compensation | $ 302 | $ 234
Progress Energy | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer deposits/Collateral liabilities | 293 | 281
Duke Energy Progress | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Accrued compensation | 143 | 114
Duke Energy Florida | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer deposits/Collateral liabilities | 191 | 164
Duke Energy Florida | Current Assets |  |
Organization And Basis Of Presentation [Line Items] |  |
Tax receivables | 12 | 166
Duke Energy Indiana | Current Liabilities |  |
Organization And Basis Of Presentation [Line Items] |  |
Customer advances | $ 117 | $ 100

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