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Stock Plans (Summary of Stock Option Activity) (Details) (USD $)
12 Months Ended
Jan. 01, 2012
Jan. 02, 2011
Jan. 03, 2010
Stock option activity      
Shares outstanding at beginning of the year 6,983,000 8,415,000 9,424,000
Shares granted 847,000 784,000 2,254,000
Shares exercised (1,138,000) (1,543,000) (459,000)
Shares canceled (1,237,000) (267,000) (2,601,000)
Shares forfeited (109,000) (406,000) (203,000)
Shares outstanding at end of year 5,346,000 6,983,000 8,415,000
Shares exercisable at end of year 3,549,000 4,787,000 4,909,000
Number of shares vested and expected to vest in the future 4,900,000    
Weighted-average price, outstanding at beginning of year (per share) $ 21.86 $ 21.27 $ 24.81
Weighted-average price, granted (per share) $ 24.20 $ 21.16 $ 13.26
Weighted-average price, exercised (per share) $ 20.86 $ 18.82 $ 13.59
Weighted-average price, canceled (per share) $ 30.29 $ 25.19 $ 28.50
Weighted-average price, forfeited (per share) $ 18.27 $ 17.67 $ 21.27
Weighted-average price, outstanding at end of year (per share) $ 20.57 $ 21.86 $ 21.27
Weighted-average price, exercisable at end of year (per share) $ 20.74 $ 23.78 $ 23.95