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Commitments and Contingencies - Guarantees (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Customer Lines Of Credit For Brazilian Subsidiary    
Guarantor Obligations [Line Items]    
Guarantor obligations, maximum exposure, undiscounted $ 258,000,000 $ 258,000,000
Guarantee of Indebtedness of Others    
Guarantor Obligations [Line Items]    
Guarantor obligations, maximum exposure, undiscounted 2,300,000,000.0 2,400,000,000
Line of Credit    
Guarantor Obligations [Line Items]    
Guarantor obligations, maximum exposure, undiscounted 39,000,000.000 40,000,000
Guarantor obligations, current carrying value $ 49,000,000 $ 32,000,000
Guarantor obligations, term 5 years