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Other Income (Expense), Net (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Other Income (Expense), Net        
Income from cash and cash investments $ 1 $ 1 $ 2 $ 3
Income from financial investments   6 2 21
Currency gain (losses) 5 (1) 5  
Other items, net 1   1 (1)
Total other, net $ 7 $ 6 $ 10 $ 23