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Supplemental Financial Information - Components of Accounts Receivable (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts Receivable, before Allowance for Credit Loss, Current $ 1,097   $ 983
Accounts Receivable, Allowance for Credit Loss, Current (26)   (24)
Accounts Receivable, after Allowance for Credit Loss, Current, Total 1,071   959
Accounts Receivable, Allowance for Credit Loss, Writeoff 2 $ 12  
Trade Accounts Receivable [Member]      
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts Receivable, before Allowance for Credit Loss, Current 1,049   939
Other Receivables [Member]      
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Accounts Receivable, before Allowance for Credit Loss, Current $ 48   $ 44