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Pension and Other Post-Employment Benefits (Plan Assets By Investment Asset Category And Fair Value Input Level) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year $ 107 $ 110
Cash and Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 11 13
Fixed Income [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 60 61
Equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 36 36
Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 11 13
Level 1 [Member] | Cash and Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 11 13
Level 1 [Member] | Fixed Income [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 0 0
Level 1 [Member] | Equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 0 0
Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 96 97
Level 2 [Member] | Cash and Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 0 0
Level 2 [Member] | Fixed Income [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 60 61
Level 2 [Member] | Equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 36 36
Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 0 0
Level 3 [Member] | Cash and Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 0 0
Level 3 [Member] | Fixed Income [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year 0 0
Level 3 [Member] | Equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair Value of Plan Assets, End of Year $ 0 $ 0