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Derivative Instruments And Hedging Activity - Additional Information (Detail) (USD $)
9 Months Ended
Sep. 28, 2014
Dec. 31, 2013
Sep. 29, 2013
Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]        
Fair Value Hedges, Net $ 0 $ 0    
Average maturity of foreign currency forward contracts, in years 2 years      
Cash and equivalents 5,105,000,000 5,301,000,000 4,065,000,000 3,296,000,000
Notional forward foreign exchange contracts outstanding 5,000,000,000 1,700,000,000    
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value, Net 0 0    
Maximum
       
Derivative Instruments, Gain (Loss) [Line Items]        
Maturity of fixed-income securities, in years 5 years      
Cash and Cash Equivalents [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Marketable Securities $ 500,000,000