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Accounts Receivable (Activity In The Allowance For Credit Losses) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Accounts Receivable [Abstract]    
Allowance for credit losses, Beginning Balance $ 66  
Provision for bad debt 21 $ 20
Amounts charged to revenue 8  
Write offs charged against the allowance (28)  
Allowance for credit losses, Ending Balance $ 67