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Variable Interest Entities (Narrative) (Details) - VIE primary beneficiary - USD ($)	1 Months Ended				3 Months Ended	6 Months Ended
	Mar. 31, 2025	Jan. 31, 2025	Apr. 30, 2024	Mar. 31, 2024	Mar. 31, 2025	Jun. 30, 2024	Dec. 31, 2024	Apr. 01, 2024	Feb. 29, 2024
Variable Interest Entities [Line Items]
Variable interest entity, financial or other support, amount					$ 0	$ 0
Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt
Variable Interest Entities [Line Items]
Repayments of debt			$ 325,000,000
Duke Energy Carolinas | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt
Variable Interest Entities [Line Items]
Repayments of debt		$ 500,000,000
Duke Energy Progress | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt
Variable Interest Entities [Line Items]
Repayments of debt	$ 400,000,000
CRC
Variable Interest Entities [Line Items]
Repayments of debt				$ 350,000,000
Accounts receivable from securitization									$ 682,000,000
CRC | Duke Energy Indiana
Variable Interest Entities [Line Items]
Accounts receivable from securitization									316,000,000
CRC | Duke Energy Ohio
Variable Interest Entities [Line Items]
Accounts receivable from securitization									$ 366,000,000
DEFR | Duke Energy Florida
Variable Interest Entities [Line Items]
Accounts receivable from securitization								$ 459,000,000
DEFR | Duke Energy Carolinas
Variable Interest Entities [Line Items]
Accounts receivable from securitization		$ 1,081,000,000
DEPSCSF | Duke Energy Progress
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds			$ 177,000,000
DEPR | Duke Energy Progress
Variable Interest Entities [Line Items]
Accounts receivable from securitization	0				0		$ 835,000,000
DEPR | Duke Energy (Parent)
Variable Interest Entities [Line Items]
Accounts receivable from securitization	$ 943,000,000				$ 943,000,000

X

- Definition

The amount owed to the reporting entity by counterparties in securitized loan transactions.

+ References

No definition available.

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- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

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- Definition

Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

+ References

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- Definition

The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support.

+ 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.

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