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Stock-Based Employee Compensation-Options (Narrative) (Details)
$ / shares in Units, shares in Millions, $ in Millions
9 Months Ended
Jan. 03, 2016
USD ($)
plan
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of equity based plans (plans) | plan 2
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years
Compensation cost not yet recognized $ 25.9
Compensation cost not yet recognized, period for recognition 1 year 5 months 26 days
Employee Stock Option  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Compensation cost not yet recognized $ 2.1
Compensation cost not yet recognized, period for recognition 1 year 1 month 17 days
Options vested and expected to vest (shares) | shares 2.7
Options vested and expected to vest, weighted average exercise price (usd per share) | $ / shares $ 9.82
Options vested and expecting to vest, weighted average remaining contractual term 3 years 6 months 25 days
Options vested and expected to vest, aggregate intrinsic value $ 44.0
Options, fully vested, outstanding (shares) | shares 1.7
Options, fully vested, outstanding, weighted average exercise price (usd per share) | $ / shares $ 7.50
Options, fully vested, weighted average remaining contractual term 2 years 10 months 13 days
Options, fully vested, aggregate intrinsic value $ 32.7
2004 Equity Plan | Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting rights (percent) 33.33%
2004 Equity Plan | Employee Stock Option  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expiration period 7 years
Award vesting period 4 years
Award vesting rights (percent) 25.00%
Minimum Exercise price, percent of fair market value (percent) 100.00%
Minimum vesting period of non-performance based full value awards made under the 2004 Plan 3 years
Minimum vesting period performance based full value awards made under the 2004 Plan 1 year
Maximum percent of shares under the equity plan that may be granted to a participant without vesting provisions (percent) 5.00%
Number of shares available for grant (shares) | shares 8.2