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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, 2025	Dec. 31, 2024
Duke Energy Ohio
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	$ 112	$ 106
Accumulated benefit obligation	107	101
Fair value of plan assets	39	32
Duke Energy Indiana
Information For Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Abstract]
Projected benefit obligation	216	203
Accumulated benefit obligation	211	197
Fair value of plan assets	$ 145	$ 128

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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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