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Pension and Other Post-Employment Benefits (Accumulated Benefit Obligation And Projected Benefit Obligation In Excess Of The Plan Assets Fair Value) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Defined Benefits [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected Benefit Obligation | $ (40) | $ (40)
Accumulated Benefit Obligation | (40) | (40)
Fair Value of Plan Assets | 18 | 20
OPEB [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected Benefit Obligation | (44) | (45)
Accumulated Benefit Obligation | (44) | (45)
Fair Value of Plan Assets | $ 0 | $ 0

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