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Long-term Debt - Narrative (Details)
3 Months Ended 6 Months Ended
Apr. 21, 2020
USD ($)
trading_day
$ / shares
Aug. 24, 2018
USD ($)
trading_day
$ / shares
Dec. 27, 2020
USD ($)
Dec. 29, 2019
USD ($)
Dec. 27, 2020
USD ($)
Dec. 29, 2019
USD ($)
Jun. 28, 2020
USD ($)
Debt Instrument [Line Items]              
Repurchase of aggregate principal amount of debt instrument         $ 200,000 $ 100,000  
Convertible Notes              
Debt Instrument [Line Items]              
Carrying amount of equity component of convertible debt     $ 228,300,000   228,300,000   $ 228,300,000
Interest expense capitalized     600,000 $ 0 800,000 $ 0  
Discount and issuance costs capitalized     1,300,000   1,700,000    
Convertible Notes | Level 2              
Debt Instrument [Line Items]              
Fair value of debt instrument     2,053,800,000   2,053,800,000    
Convertible Notes | Convertible Notes due September 1, 2023              
Debt Instrument [Line Items]              
Aggregate principal amount   $ 500,000,000.0          
Stated interest rate (as a percent)   0.875%          
Aggregate principal amount of conversion feature   $ 75,000,000.0          
Proceeds from issuance of long-term debt   $ 562,100,000          
Conversion rate   16.6745          
Conversion price (USD per share) | $ / shares   $ 59.97          
Threshold percentage of stock price trigger (as a percent)   130.00%          
Threshold trading days | trading_day   20          
Threshold consecutive trading days | trading_day   30          
Conversion ratio (as a percent)   1          
Period of reported sale price of common stock   5 days          
Period of consecutive reported sale price of common stock   10 days          
Percentage of product of last reported price (as a percent)   98.00%          
Repurchase of aggregate principal amount of debt instrument         150,200,000    
Decrease in accrued interest from repurchase of debt         200,000    
Carrying amount of equity component of convertible debt     110,600,000   110,600,000    
Decrease in carrying amount of equity component of convertible debt         27,700,000    
Effective interest rate (as a percent)   5.87%          
Convertible Notes | Convertible Notes due May 1, 2026              
Debt Instrument [Line Items]              
Aggregate principal amount $ 500,000,000.0            
Stated interest rate (as a percent) 1.75%            
Aggregate principal amount of conversion feature $ 75,000,000.0            
Proceeds from issuance of long-term debt $ 561,400,000            
Conversion rate 21.1346            
Conversion price (USD per share) | $ / shares $ 47.32            
Threshold percentage of stock price trigger (as a percent) 130.00%            
Threshold trading days | trading_day 20            
Threshold consecutive trading days | trading_day 30            
Conversion ratio (as a percent) 1            
Period of reported sale price of common stock 5 days            
Period of consecutive reported sale price of common stock 10 days            
Percentage of product of last reported price (as a percent) 98.00%            
Proceeds from Notes used to repurchase debt         144,300,000    
Carrying amount of equity component of convertible debt     145,400,000   145,400,000    
Effective interest rate (as a percent) 7.45%            
Line of Credit              
Debt Instrument [Line Items]              
Maximum borrowing capacity     $ 125,000,000.0   $ 125,000,000.0    
Minimum required ratio of cash equivalents and marketable securities to outstanding loans and letters of credit obligations     1.25   1.25    
Outstanding borrowings     $ 0   $ 0    
Remaining borrowing capacity     $ 125,000,000.0   $ 125,000,000.0    
Average interest rate (as a percent)     0.00%   0.00%    
Commitment fee rate (as a percent)         0.25%