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Related Party Transactions (Intercompany Income Taxes) (Details) - Affiliated entity - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Duke Energy Carolinas |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | $ 37 | $ 62
Progress Energy |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 95 |
Duke Energy Progress |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 36 |
Intercompany income tax payable |  | 84
Duke Energy Florida |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable | 17 | 40
Duke Energy Ohio |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax receivable |  | 19
Intercompany income tax payable | 17 |
Duke Energy Indiana |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | 18 | 10
Piedmont |  |
Related Party Transaction [Line Items] |  |
Intercompany income tax payable | $ 38 | $ 27

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