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Other Income and Expense - Other Expense (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Other Income and Expenses [Abstract]    
Loss on sale and disposal of assets $ 7 $ 14
Contract termination 0 7
Other 1 5
Total other expense $ 8 $ 26