v3.2.0.727
Fair Value Of Financial Instruments Narrative (Details) - Fair Value Measurement [Domain] - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Derivative, Fair Value, Net $ (116)   $ (116)   $ (104)
Total debt, recorded amount 2,736   2,736   2,451
Asset Impairment Charges 4 $ 3 6 $ 3  
Impairment loss on KDAC interest     88    
Fair Value, Measurements, Nonrecurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Asset Impairment Charges       0  
Cost of Sales | Fair Value, Measurements, Nonrecurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Asset Impairment Charges 4   6 2  
Selling, General and Administrative Expenses [Member] | Fair Value, Measurements, Nonrecurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Asset Impairment Charges       $ 1  
Fair Value, Inputs, Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total debt, fair value $ 2,744   $ 2,744   $ 2,567