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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]      
Taxes paid $ 158 $ 137 $ 109
Valuation allowance 225 241  
Income tax benefit (186) (178) (43)
Deferred taxes on earnings of foreign subsidiaries 1,000    
Unrecognized tax benefits, interest and penalties excluded from reserves 1    
Unrecognized tax benefits, settlements for certain tax contingencies 12 9 0
Interest and penalties expenses 1 3 1
Unrecognized tax benefits that if recognized would affect ETR $ 27    
Brazil [Member]      
Income Taxes [Line Items]      
Tax incentives, beginning of expiration date 2018    
Increase in net income attributable to the Company resulting from incentives $ 13 $ 8 12
State [Member]      
Income Taxes [Line Items]      
Tax loss carryforwards 135    
Valuation allowance 204    
Canada [Member]      
Income Taxes [Line Items]      
Income tax benefit 31    
U.S. [Member]      
Income Taxes [Line Items]      
Tax credit carryforward 92    
Windfall tax benefits 60    
France [Member]      
Income Taxes [Line Items]      
Tax loss carryforwards 59    
Income tax benefit     $ 86
Spain [Member]      
Income Taxes [Line Items]      
Unrecognized tax benefits, settlements for certain tax contingencies $ 8