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Employee Benefit Plans (Information For Plans with Accumulated Benefit Obligation in Excess of Plan Assets) (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Duke Energy Ohio
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	$ 106	$ 105
Accumulated benefit obligation	101	100
Fair value of plan assets	32	31
Duke Energy Indiana
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	203	208
Accumulated benefit obligation	197	203
Fair value of plan assets	$ 128	$ 121

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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-Section 55
-Paragraph 17
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-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-3

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