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Supplemental Cash Flow Information (Tables)
9 Months Ended
Sep. 30, 2011
Supplemental Cash Flow Information (Tables) [Abstract] 
Supplemental Cash Flow Information
                 
    Year-to-Date Ended
    September 30,
 		  September 24,
    2011   2010
    (in millions)
 
Interest paid on outstanding debt
  $   171     $   173  
Income tax payments
    204       256  
Income tax refunds
    14       6