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Contingencies and Litigation - Loss Contingencies by Contingency (Details) - Brazil Contingencies - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Loss Contingencies [Line Items]    
Tax contingency - unreserved $ 349 $ 355
Escrow cash deposits 33 39
Surety bonds 103 112
Letters of credit 75 78
Liens on Brazilian assets $ 0 $ 0