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Commitments and Contingencies (Narratives) (Details)
$ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
claim
Loss Contingencies    
Tax receivable agreement commitment (percent)   85.00%
Subsequent Event    
Loss Contingencies    
Payments from the exercise of call options $ 42  
Pending litigation | Secretariat of the Federal Revenue Bureau of Brazil | Potential tax liability    
Loss Contingencies    
Loss contingency, value of damages sought   $ 14
Loss contingency, number of claims pending | claim   13
Loss contingency, number of additional claims filed | claim   25
Loss contingency, potential additional claims amount sought   $ 50
Number of total pending and potential pending claims | claim   38
Pending litigation | Secretariat of the Federal Revenue Bureau of Brazil | Potential tax liability | Maximum    
Loss Contingencies    
Loss contingency, estimate of possible loss   $ 64
Reliance | Pending litigation    
Loss Contingencies    
Loss contingency, value of damages sought   115
Tax Receivable Agreement    
Loss Contingencies    
Tax receivable agreement obligations   $ 564