Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details) (Summary of Derivative Instruments) (Details)

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Financial Instruments (Details) (Summary of Derivative Instruments) (Details) - USD ($)
$ in Millions
Jun. 27, 2015
Dec. 27, 2014
Foreign Exchange Contract    
Derivative [Line Items]    
Contracts designated as cash flow hedging instruments $ (6) $ (6)
Contracts not designated as hedging instruments (1) (1)
Derivative, hedging instruments, net 7  
Cash Flow Hedging Instruments    
Derivative [Line Items]    
Derivative, notional amount 218 298
Fair Value Hedging | Interest Rate Contract    
Derivative [Line Items]    
Derivative, hedging instruments, net $ 6 $ 3