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Pension and Other Post-Employment Benefits (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Average Remaining Life Expectancy of Inactive Employees in Defined Benefit Plan, In Years     12 years
Accumulated Benefit Obligation $ 165 $ 169  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year $ 0    
Defined Benefit Plan, Actual Plan Asset Allocations 67.00% 66.00%  
Long-Term Rate of Return on Plan Assets 4.90%    
U.S. and Foreign Equity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 33.00% 31.00%  
Operating Expense [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Pension and Other Postretirement (Benefit) Expense $ 20 $ 23 $ 22
Administrative Expense [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Pension and Other Postretirement (Benefit) Expense 5 5 5
Other Nonoperating Income (Expense) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Pension and Other Postretirement (Benefit) Expense 4 $ 4 $ 4
Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations   3.00%  
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Average Remaining Service Period Of Active Participates In Plan In Years     10 years
Pension and Other Postretirement (Benefit) Expense $ 24 $ 27 $ 27
Long-Term Rate of Return on Plan Assets 3.95% 4.00% 3.85%
Actual Return on Plan Assets $ 4 $ 9  
OPEB [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Average Remaining Service Period Of Active Participates In Plan In Years     4 years
Pension and Other Postretirement (Benefit) Expense $ (3) $ (3) $ (4)
Long-Term Rate of Return on Plan Assets 0.00% 0.00% 0.00%
Actual Return on Plan Assets $ 0 $ 0