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Schedule II - Valuation And Qualifying Accounts (Details) - Allowance for doubtful accounts - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 134 $ 105 $ 103
Charged to costs & expenses 31 31 30
Impact of currency (5) 4 (1)
Charged to other accounts 0 14 0
Write-offs, write-downs & deductions (34) (20) (27)
Balance at end of period $ 126 $ 134 $ 105