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Related Party Transactions - (Receivables and Payables) (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]    
Accounts payable and accrued liabilities $ 1,269 $ 1,146
Other long-term liabilities 394 386
Affiliated entity | Banco Bradesco    
Related Party Transaction [Line Items]    
Trade receivables 48 45
Accounts payable and accrued liabilities 11 10
Other long-term liabilities $ 23 $ 22