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Derivative Financial Instruments (Details 2) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Derivatives, Fair Value    
Total fair value $ (1) $ (12)
Other current assets | Derivatives designated as hedging instruments    
Derivatives, Fair Value    
Assets 1 1
Other current liabilities | Derivatives designated as hedging instruments    
Derivatives, Fair Value    
Other current liabilities $ (2) $ (13)