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Summary of Significant Accounting Policies - Changes in Carrying Amount of Service and Product Warranties (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Commitments And Contingencies Disclosure [Abstract]    
Beginning Balance $ 194 $ 211
Net provisions for warranties issued during the year 101 51
Amounts incurred (73) (76)
Currency translation adjustments and other 6 8
Ending Balance $ 228 $ 194