Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable - Allowance for Doubtful Accounts (Details)

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Accounts Receivable - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Balance as of January 1, $ 81 $ 72
(Recovery of)/provision for doubtful accounts (1) 14
Bad debt write-offs (4) (8)
Balance as of June 30, $ 76 $ 78