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Merger, Restructuring and Other Accruals - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Business Acquisition [Line Items]        
Merger, restructuring and other operating expenses, net $ 72 $ 44 $ 276 $ 90
Charges Incurred     178  
Transaction and integration expenses 33 24 92 45
Merger-related expenses 17 10 136 19
Other costs related to Merger activities     41  
Merger, Restructuring and Other Operating Expenses, Net
       
Business Acquisition [Line Items]        
Charges Incurred     178  
Non-cash Equity Compensation Expenses
       
Business Acquisition [Line Items]        
Merger-related expenses     $ 6