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Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Duke Energy Carolinas |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | $ 0 | $ 0
Intercompany income tax payable | 98 | 81
Progress Energy |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 0 | 0
Intercompany income tax payable | 167 | 92
Duke Energy Progress |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 0 | 0
Intercompany income tax payable | 53 | 94
Duke Energy Florida |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 0 | 0
Intercompany income tax payable | 120 | 114
Duke Energy Ohio |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 2 | 91
Intercompany income tax payable | 0 | 0
Duke Energy Indiana |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 0 | 53
Intercompany income tax payable | 29 | 0
Piedmont |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 39 | 0
Intercompany income tax payable | $ 0 | $ 57

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