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Long-Term Debt And Lease Obligation (Long-Term Debt and Lease Obligation Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Lessee, Lease, Description [Line Items]    
Total lease liability $ 60 $ 59
Lessee, Operating Lease, Term of Contract 5 years  
Total lease liability $ 60 $ 59
Interest Costs Incurred $ 7  
Maximum    
Lessee, Lease, Description [Line Items]    
Lessee, Finance Lease, Term of Contract 6 years  
Minimum    
Lessee, Lease, Description [Line Items]    
Lessee, Finance Lease, Term of Contract 3 years