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Commitments and Contingencies - Narrative (Details)
R$ in Millions
 3 Months Ended 12 Months Ended 24 Months Ended
Mar. 31, 2018
USD ($)
Dec. 31, 2017
BRL (R$)
Dec. 31, 2017
USD ($)
Dec. 31, 2009
USD ($)
Dec. 31, 2004
USD ($)
Mar. 31, 2018
BRL (R$)
Mar. 31, 2018
USD ($)
Commitments and Contingencies [Line Items]              
BEFIEX tax credits, additional amount available to recognize             $ 72,000,000
BEFIEX tax credits monetized $ 22,000,000   $ 42,000,000        
BEFIEX tax credits             8,000,000
Outstanding BEFIEX tax assessment           R$ 1,900 568,000,000
Brazil tax matters              
Commitments and Contingencies [Line Items]              
IPI tax credits recognized         $ 26,000,000    
Special government program settlement       $ 34,000,000      
Brazil tax assessment           244 73,000,000
CFC tax              
Commitments and Contingencies [Line Items]              
CFC potential exposure           R$ 223 67,000,000
Accrual for CFC potential exposure             $ 0
Non-income and Income Tax Matters [Member]              
Commitments and Contingencies [Line Items]              
Loss contingency, proceeds from sell of rights   R$ 90 27,000,000        
Loss contingency, damages sought, value of remaining credits     $ 260,000,000