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Cash, Cash Equivalents and Short-Term Investments (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 28, 2025
Jun. 29, 2024
Cash    
Cash and Cash Equivalents [Line Items]    
Amortized Cost $ 360.7 $ 238.4
Gross unrealized gain/(loss) 0.0 0.0
Fair Value 360.7 238.4
Money market funds    
Cash and Cash Equivalents [Line Items]    
Amortized Cost 16.7 600.4
Gross unrealized gain/(loss) 0.0 0.0
Fair Value 16.7 600.4
Certificates of deposit    
Cash and Cash Equivalents [Line Items]    
Amortized Cost 14.1 38.1
Gross unrealized gain/(loss) 0.0 0.0
Fair Value 14.1 38.1
Certificates of deposit | Short-term investments:    
Cash and Cash Equivalents [Line Items]    
Amortized Cost 61.0 0.0
Gross unrealized gain/(loss) 0.0 0.0
Fair Value 61.0 0.0
Cash and cash equivalents    
Cash and Cash Equivalents [Line Items]    
Amortized Cost 391.5 876.9
Gross unrealized gain/(loss) 0.0 0.0
Fair Value $ 391.5 $ 876.9