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Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Nov. 15, 2017
Dec. 30, 2017
Dec. 31, 2016
Dec. 30, 2017
Dec. 31, 2016
Jul. 02, 2017
Stock-Based Compensation            
Stock-based compensation capitalized to inventory       $ 0.9 $ 0.7  
Reclassification out of operating cash flows       34.9 36.7  
Reclassification to financing cash flows       $ 213.3 43.9  
Operating loss carryforward           $ 117.7
Accounting Standards Update 2016-09            
Stock-Based Compensation            
Reclassification out of operating cash flows         $ 7.8  
Reclassification to financing cash flows   $ 5.2 $ 4.6      
Accounting Standards Update 2016-09 | Retained Earnings            
Stock-Based Compensation            
Cumulative effect adjustment           $ 0.6
Full Value Awards - Total            
Stock-Based Compensation            
Exercise price (in dollars per share)   $ 0   $ 0    
Unrecognized stock-based compensation   $ 53.0   $ 53.0    
Estimated amortization period for unrecognized compensation       1 year 11 months 16 days    
Full Value Awards - Total | Minimum            
Stock-Based Compensation            
Vesting period       3 years    
Full Value Awards - Total | Maximum            
Stock-Based Compensation            
Vesting period       4 years    
RSUs            
Stock-Based Compensation            
Granted (in shares)       3,100,000 3,900,000  
Restricted Stock Units with Time Based Conditions            
Stock-Based Compensation            
Vesting period       3 years    
Percentage of first tranche vested       33.00%    
Initial vesting period       1 year    
Subsequent vesting period       2 years    
Restricted Stock Units with Market and Performance Conditions            
Stock-Based Compensation            
Vesting period       3 years    
Granted (in shares)       500,000 400,000  
Aggregate grant-date fair value       $ 6.1 $ 3.3  
Restricted Stock Units with Performance Conditions Over Target            
Stock-Based Compensation            
Granted (in shares)       200,000 100,000  
Amended and Restated 2003 Plan            
Stock-Based Compensation            
Number of additional shares authorized (in shares) 4,000,000          
Shares authorized (in shares) 5,500,000