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Debt And Commitments - Interest (Income) Expense, Net (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Interest expense      
Current $ 27 $ 16 $ 9
Long-term 7 3 2
Interest Expense, Total 34 19 11
Interest income (18) (25) (22)
Interest expense (income), net $ 16 $ (6) $ (11)