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Pension and Other Post-Employment Benefits (Total Benefit Plan Expense Recognized) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net Defined Periodic Benefit Cost $ 1 $ 1 $ 2
Defined Contribution Plan Expense 23 26 25
Total Benefit Plans Expense 24 27 27
OPEB [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net Defined Periodic Benefit Cost (3) (3) (4)
Defined Contribution Plan Expense 0 0 0
Total Benefit Plans Expense $ (3) $ (3) $ (4)