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Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Duke Energy Carolinas |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | $ 419 | $ 81
Progress Energy |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | 169 | 92
Duke Energy Progress |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | 315 | 94
Duke Energy Florida |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 154 |
Intercompany income tax payable |  | 114
Duke Energy Ohio |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable |  | 91
Intercompany income tax payable | 43 |
Duke Energy Indiana |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable |  | 53
Intercompany income tax payable | 110 |
Piedmont |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | $ 43 | $ 57

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