Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax payable	$ 89	$ 37
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax receivable		95
Intercompany income tax payable	50
Duke Energy Progress
Related Party Transaction [Line Items]
Intercompany income tax receivable		36
Intercompany income tax payable	28
Duke Energy Florida
Related Party Transaction [Line Items]
Intercompany income tax receivable		17
Intercompany income tax payable	95
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax receivable	2
Intercompany income tax payable		17
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax payable	26	18
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 24
Intercompany income tax payable		$ 38

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.

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