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Debt - 1.75% Convertible Senior Notes ("2023 Notes) (Narrative) (Details) - Convertible Debt
12 Months Ended
May 29, 2018
USD ($)
day
$ / shares
Jul. 03, 2021
USD ($)
shares
Jun. 27, 2020
USD ($)
Debt Instrument [Line Items]      
Carrying value of liability component   $ 209,800,000 $ 600,900,000
Carrying value of the equity component of convertible debt   91,000,000.0 136,800,000
Unamortized debt issuance cost   $ 800,000 $ 5,000,000.0
2023 Notes      
Debt Instrument [Line Items]      
Face amount of senior convertible notes $ 225,000,000    
Interest rate on senior convertible notes 1.75%   1.75%
Effective rate 5.30%    
Swap rate term 5 years    
Expected remaining term of Notes   1 year 10 months 24 days  
Conversion rate (shares) | shares   71.7231  
Initial conversion price (usd per share) | $ / shares $ 13.94    
Premium to closing sale price of common stock (percent) 37.50%    
Threshold closing price as a percentage of conversion price 130.00%    
Threshold trading days (days) | day 20    
Threshold consecutive trading days (days) | day 30    
Threshold consecutive business days (days) | day 5    
Threshold consecutive trading days during which the the trading price was less than 98% of the product of the closing sale price and the applicable conversion rate (days) | day 10    
Threshold percentage of stock price trigger 98.00%    
Fundamental change in price (percent) 100.00%    
Redemption price (percent) 100.00%    
Carrying value of liability component $ 190,100,000    
Carrying value of the equity component of convertible debt 34,900,000    
Issuance costs 2,200,000    
Unamortized debt issuance cost   $ 800,000  
Fair value of Notes   $ 300,700,000 $ 251,400,000
Liability component      
Debt Instrument [Line Items]      
Issuance costs 1,900,000    
Equity component      
Debt Instrument [Line Items]      
Issuance costs 300,000    
Exchange Transaction | 2023 Notes      
Debt Instrument [Line Items]      
Proceeds from issuance of senior convertible debt 155,500,000    
Exchange Transaction | Senior Convertible Notes due 2033      
Debt Instrument [Line Items]      
Value of notes exchanged 151,500,000    
Private Placement | 2023 Notes      
Debt Instrument [Line Items]      
Proceeds from issuance of senior convertible debt 69,500,000    
Proceeds from issuance of senior convertible debt, after issuance costs $ 67,300,000