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Stock-Based Compensation (Details 2) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 26, 2015
Sep. 26, 2015
Dec. 26, 2015
Dec. 27, 2014
Jun. 27, 2015
Stock-Based Compensation          
Employee withholding taxes classified as operating cash outflows     $ 3.9 $ 4.5  
Options          
Stock-Based Compensation          
Stock options granted during period (in shares)     0   0
Intrinsic value of shares exercised $ 0.1   $ 0.1    
Restricted Stock Units          
Stock-Based Compensation          
Awards granted (in shares)     1,800,000    
Unrecognized stock-based compensation $ 49.1   $ 49.1    
Estimated amortization period     2 years 3 months 24 days    
PSU          
Stock-Based Compensation          
Additional stock-based compensation expense   $ 0.1      
Awards granted (in shares)     41,000    
Aggregate grant-date fair value     $ 0.8    
Vesting period     3 years    
Time-based RSUs          
Stock-Based Compensation          
Awards granted (in shares)     1,800,000    
Aggregate grant-date fair value     $ 35.0    
Vesting period     3 years    
Annual award vesting percentage     33.30%    
Employee Stock Purchase Plan          
Stock-Based Compensation          
Discount from market price on offering date (as a percent)     15.00%    
Discount from market price on purchase date (as a percent)     15.00%