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Stock-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 3 Months Ended
Jul. 01, 2012
Years
Jul. 01, 2012
Employee Share Purchase Plan [Member]
Apr. 01, 2012
Employee Share Purchase Plan [Member]
Jul. 01, 2012
Stock Incentive Plan [Member]
Apr. 01, 2012
Stock Incentive Plan [Member]
Jul. 01, 2012
Supplemental Stock Incentive Plan [Member]
Jul. 01, 2012
Stock Options [Member]
Years
Jul. 01, 2012
Restricted Stock Units [Member]
Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares authorized   3,700,000 3,450,000 10,750,000 10,500,000 500,000    
Shares available for grant 2,559,295              
Shares of common stock reserved for issuance 4,200,329              
Total compensation cost not yet recognized $ 27.6              
Total compensation cost not yet recognized - period for recognition 1.9              
Options Outstanding and Exercisable:                
Options outstanding, number             851,248  
Options exercisable, number             272,045  
Options outstanding, weighted average exercise price             $ 29.16  
Options exercisable, weighted average exercise price             $ 21.73  
Options outstanding, aggregate intrinsic value             15.9  
Options exercisable, aggregate intrinsic value             7.1  
Options outstanding, weighted average remaining contractual term (in years)             4.7  
Options exercisable, weighted average remaining contractual term (in years)             2.5  
Restricted Stock Units Nonvested and Expected to Vest                
Restricted stock units nonvested, number               789,788
Restricted stock units expected to vest, number               692,026
Restricted stock units nonvested, weighted average grant date per share fair value               $ 32.99
Restricted stock units expected to vest, weighted average grant date per share fair value               $ 32.75
Restricted stock units nonvested, aggregate intrinsic value               37.8
Restricted stock units expected to vest, aggregate intrinsic value               $ 33.1
Restricted stock units nonvested, weighted average remaining term to vest (in years)               1.5
Restricted stock units expected to vest, weighted average remaining term to vest (in years)               1.5