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Revenue - Activity in Uncollectable Accounts (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance $ 159 $ 164
Provision for expected credit losses 29 54
Charged to other accounts 54 42
Write-offs (106) (101)
Ending balance 136 159
Deferred (refunded to customer) for recovery $ 2 $ 12