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Cash and Cash Equivalents and Short-Term Investments (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 27, 2025
Jun. 28, 2025
Cash    
Cash ,Cash Equivalents & Short Term Investments    
Amortized Cost $ 357.4 $ 360.7
Gross unrealized loss 0.0 0.0
Fair Value 357.4 360.7
Money market funds    
Cash ,Cash Equivalents & Short Term Investments    
Amortized Cost 21.8 16.7
Gross unrealized loss 0.0 0.0
Fair Value 21.8 16.7
Certificates of deposit    
Cash ,Cash Equivalents & Short Term Investments    
Amortized Cost 80.7 14.1
Gross unrealized loss 0.0 0.0
Fair Value 80.7 14.1
Certificates of deposit | Short-Term Investments    
Cash ,Cash Equivalents & Short Term Investments    
Amortized Cost 0.0 61.0
Gross unrealized loss 0.0 0.0
Fair Value 0.0 61.0
Cash and Cash Equivalents    
Cash ,Cash Equivalents & Short Term Investments    
Amortized Cost 459.9 391.5
Gross unrealized loss 0.0 0.0
Fair Value $ 459.9 $ 391.5