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Supplemental Cash Flow Information (Tables)
 9 Months Ended
Sep. 27, 2013
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
     Year-to-Date Ended  
     September 27,
2013		      September 28,
2012		  
     (in millions)  

Interest paid on outstanding debt

    $ 133       $ 152   

Income tax payments

      168         248   

Income tax refunds

      20         18