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Provision For Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Provision for income taxes $ 13 $ 9
Tax Adjustments, Settlements, and Unusual Provisions 8  
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest 49 33
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount 2  
Mexico [Member]    
Tax Adjustments, Settlements, and Unusual Provisions 1  
Worldwide [Member]    
Tax Adjustments, Settlements, and Unusual Provisions 2  
Jurisdictions where valuation allowances are maintained [Member]    
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest $ (7) $ (26)