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Contingencies and Litigation - Brazil Contingencies (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Loss Contingencies [Line Items]    
Letters of credit $ 0 $ 0
Brazil Contingencies    
Loss Contingencies [Line Items]    
Tax contingency - unreserved 355,000,000 442,000,000
Escrow cash deposits 39,000,000 51,000,000
Surety bonds 112,000,000 135,000,000
Letters of credit 78,000,000 91,000,000
Liens on Brazilian assets $ 0 $ 0