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Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 0	$ 0
Intercompany income tax payable	115	81
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax receivable	0	0
Intercompany income tax payable	96	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	38	114
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax receivable	7	91
Intercompany income tax payable	0	0
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax receivable	28	53
Intercompany income tax payable	0	0
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax receivable	39	0
Intercompany income tax payable	$ 0	$ 57

X

- Definition

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.

+ References

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- Definition

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.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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