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Employee Benefit Plans (Plan Contributions) (Details) - Qualified Pension Plans - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	$ 100	$ 100
Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	26	26
Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	23	22
Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	14	13
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	9	9
Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	5	5
Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	8	8
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Contributions made:	$ 3	$ 3

X

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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