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Debt - 1.00% Senior Convertible Notes ("2024 Notes") (Narrative) (Details)
1 Months Ended 3 Months Ended
Jul. 03, 2021
USD ($)
shares
Mar. 22, 2017
USD ($)
day
Feb. 27, 2017
Mar. 22, 2017
USD ($)
Jul. 03, 2021
USD ($)
day
shares
Jun. 27, 2020
USD ($)
May 29, 2018
$ / shares
Mar. 03, 2017
USD ($)
Debt Instrument [Line Items]                
Short-term debt $ 414,200,000       $ 414,200,000 $ 2,800,000    
Temporary equity 1.00% Convertible Notes due 2024 45,800,000       45,800,000 0    
Convertible Debt                
Debt Instrument [Line Items]                
Carrying value of liability component 209,800,000       209,800,000 600,900,000    
Carrying value of the equity component of convertible debt 91,000,000.0       91,000,000.0 136,800,000    
Unamortized debt issuance cost $ 800,000       $ 800,000 $ 5,000,000.0    
Convertible Debt | 1.00% Senior Convertible Notes                
Debt Instrument [Line Items]                
Face amount of senior convertible notes   $ 60,000,000   $ 60,000,000       $ 400,000,000
Interest rate on senior convertible notes   1.00%   1.00%   1.00%   1.00%
Proceeds from issuance of senior convertible debt, after issuance costs       $ 451,100,000        
Conversion rate (shares) | shares 75.6229       75.6229      
Initial conversion price (usd per share) | $ / shares             $ 13.22  
Premium to closing sale price of common stock (percent)     32.50%          
Repurchase price (percent)   100.00%            
Effective rate   4.80%   4.80%        
Derivative term   7 years            
Carrying value of liability component   $ 358,100,000   $ 358,100,000        
Carrying value of the equity component of convertible debt   101,900,000   101,900,000        
Expected remaining term of Notes 2 years 8 months 12 days              
Issuance costs   $ 8,900,000   8,900,000        
Unamortized debt issuance cost $ 2,900,000       $ 2,900,000      
Short-term debt 414,200,000       414,200,000      
Temporary equity 1.00% Convertible Notes due 2024 45,800,000       45,800,000 $ 0    
Fair value of Notes $ 646,900,000       $ 646,900,000 $ 523,300,000    
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria 1                
Debt Instrument [Line Items]                
Threshold percentage of stock price trigger         130.00%      
Threshold trading days (days) | day         20      
Threshold consecutive trading days (days) | day         30      
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria 2                
Debt Instrument [Line Items]                
Threshold trading days (days) | day   45            
Trading days used to calculate stock price trigger (days) | day   10            
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria 3                
Debt Instrument [Line Items]                
Threshold percentage of stock price trigger   10.00%            
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria 4                
Debt Instrument [Line Items]                
Threshold percentage of stock price trigger   98.00%            
Threshold consecutive trading days (days) | day   10            
Threshold consecutive business days (days) | day   5            
Convertible Debt | Liability component                
Debt Instrument [Line Items]                
Issuance costs   $ 6,900,000   6,900,000        
Convertible Debt | Equity component                
Debt Instrument [Line Items]                
Issuance costs   $ 2,000,000   $ 2,000,000