v2.4.0.6
Stock Options Plans and Stock-Based Compensation (Details 1) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Y
Jan. 01, 2011
Jan. 02, 2010
Dec. 30, 2011
Apr. 01, 2011
Summary of stock option plan activity          
Number of Shares, Beginning Balance 3,657,035 3,396,628 3,523,931    
Weighted Average Exercise Price, Beginning Balance $ 13.40 $ 11.77 $ 13.24    
Number of Shares, Granted 349,650 1,058,323 941,406    
Weighted Average Exercise Price, Granted $ 33.27 $ 16.65 $ 11.09    
Number of Shares, Exercised (1,232,721) (667,348) (243,791)    
Weighted Average Exercise Price, Exercised $ 10.87 $ 9.87 $ 3.02    
Number of Shares, Canceled (212,672) (130,568) (824,918)    
Weighted Average Exercise Price, Canceled $ 15.37 $ 15.21 $ 19.89    
Number of Shares, Ending Balance 2,561,292 3,657,035 3,396,628    
Weighted Average Exercise Price, Ending Balance $ 17.17 $ 13.40 $ 11.77    
Weighted Average Remaining Contractual Term, Ending Balance 4.36        
Aggregate Intrinsic Value, Ending Balance $ 33.6        
Number of Shares, Vested and expected to vest 2,454,904        
Weighted Average Exercise Price, Vested and expected to vest $ 16.94        
Weighted Average Remaining Contractual Term, Vested and expected to vest 4.31        
Aggregate Intrinsic Value, Vested and expected to vest 32.7        
Number of Shares, Exercisable 1,397,605        
Weighted Average Exercise Price, Exercisable $ 14.51     $ 29.85 $ 33.48
Weighted Average Remaining Contractual Term, Exercisable 3.56        
Aggregate Intrinsic Value, Exercisable $ 21.4        
Weighted average fair value of each stock option granted $ 16.55 $ 8.24 $ 4.91