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Employee Benefit Plans OPEB Plan Assets, Fair Value Measurements by Input Level (Details) - Other Postretirement Benefit Plans - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Defined Benefit Plans and Other Postretirement Benefit Plans |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 7.5 | $ 7.9 | $ 8.2
Fair Value, Inputs, Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0.0 | 0.0 |
Fair Value, Inputs, Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0.0 | 0.0 |
Fair Value, Inputs, Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 7.5 | $ 7.9 | $ 8.2

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