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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