v3.3.1.900
Income Taxes NOL & Tax Credit Carryforwards and Undistributed Foreign Earnings (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]    
Deferred Tax Assets, Operating Loss Carryforwards, Foreign $ 902  
Deferred Tax Assets, Valuation Allowance 910 $ 747
Operating Loss Carryforwards 910  
Net Operating Loss Carryforward Related to Windfall Tax Benefit 8  
Deferred Tax Assets, Tax Credit Carryforwards 53 40
Undistributed Earnings of Foreign Subsidiaries [Abstract]    
Indefinitely reinvested earnings of foreign subsidiaries 429  
Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries 82  
Deferred Tax Liabilities, Undistributed Foreign Earnings 70 74
Foreign Tax Authority | Valuation Allowance, Operating Loss Carryforwards    
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]    
Deferred Tax Assets, Valuation Allowance 787  
Foreign Tax Authority | Valuation Allowance, Tax Credit Carryforward    
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]    
Deferred Tax Assets, Valuation Allowance $ 31 $ 27
Minimum | Foreign Tax Authority    
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]    
Operating Loss Carryforwards, Expiration Dates, Period 1 year