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Debt (Tables)
9 Months Ended
Oct. 01, 2011
Debt [Abstract] 
Components of Notes Payable
(millions)  October 1, 2011  January 1, 2011 
   Principal amount Effective interest rate   Principal amount Effective interest rate  
              
U.S. commercial paper $ 707  0.27% $ -  -% 
Bank borrowings   30      44    
Total $ 737    $ 44