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Financial Instruments - Derivative Foreign Currency Contracts at Gross Fair Value and Unrecognized Impacts of Master Netting Arrangements (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Offsetting [Abstract]    
Assets, Gross amounts presented in Consolidated Balance Sheets $ 62 $ 69
Assets, Gross amounts not offset in Consolidated Balance Sheets 42 20
Assets, Net Amounts 20 49
Liabilities, Gross amounts presented in Consolidated Balance Sheets (65) (20)
Liabilities, Gross amounts not offset in Consolidated Balance Sheets (42) (20)
Liabilities, Net Amounts $ (23) $ 0