v3.25.1
Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Mar. 29, 2025
Sep. 28, 2024
Assets:    
Total available-for-sale securities $ 371.8 $ 992.9
Total 380.8 996.8
Liabilities:    
Contingent consideration 1.1 1.1
Total 1.3 13.9
Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Total 371.8 992.9
Liabilities:    
Contingent consideration 0.0 0.0
Total 0.0 0.0
Significant Other Observable Inputs (Level 2)    
Assets:    
Total 9.0 3.9
Liabilities:    
Contingent consideration 0.0 0.0
Total 0.2 12.8
Significant Unobservable Inputs (Level 3)    
Assets:    
Total 0.0 0.0
Liabilities:    
Contingent consideration 1.1 1.1
Total 1.1 1.1
Interest Rate Swap    
Assets:    
Interest rate swaps 5.9 3.1
Liabilities:    
Interest rate swaps   0.2
Interest Rate Swap | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Interest rate swaps 0.0 0.0
Liabilities:    
Interest rate swaps   0.0
Interest Rate Swap | Significant Other Observable Inputs (Level 2)    
Assets:    
Interest rate swaps 5.9 3.1
Liabilities:    
Interest rate swaps   0.2
Interest Rate Swap | Significant Unobservable Inputs (Level 3)    
Assets:    
Interest rate swaps 0.0 0.0
Liabilities:    
Interest rate swaps   0.0
Forward foreign currency contracts    
Assets:    
Forward foreign currency contracts 3.1  
Liabilities:    
Forward foreign currency contracts 0.2 12.6
Forward foreign currency contracts | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Forward foreign currency contracts 0.0  
Liabilities:    
Forward foreign currency contracts 0.0 0.0
Forward foreign currency contracts | Significant Other Observable Inputs (Level 2)    
Assets:    
Forward foreign currency contracts 3.1  
Liabilities:    
Forward foreign currency contracts 0.2 12.6
Forward foreign currency contracts | Significant Unobservable Inputs (Level 3)    
Assets:    
Forward foreign currency contracts 0.0  
Liabilities:    
Forward foreign currency contracts 0.0 0.0
Foreign currency option contracts    
Assets:    
Forward foreign currency contracts   0.8
Foreign currency option contracts | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Forward foreign currency contracts   0.0
Foreign currency option contracts | Significant Other Observable Inputs (Level 2)    
Assets:    
Forward foreign currency contracts   0.8
Foreign currency option contracts | Significant Unobservable Inputs (Level 3)    
Assets:    
Forward foreign currency contracts   0.0
Money Market Funds    
Assets:    
Assets: 180.3 341.7
Money Market Funds | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Assets: 180.3 341.7
Money Market Funds | Significant Other Observable Inputs (Level 2)    
Assets:    
Assets: 0.0 0.0
Money Market Funds | Significant Unobservable Inputs (Level 3)    
Assets:    
Assets: 0.0 0.0
US Treasury Securities    
Assets:    
Total available-for-sale securities 191.5 626.3
US Treasury Securities | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Total available-for-sale securities 191.5 626.3
US Treasury Securities | Significant Other Observable Inputs (Level 2)    
Assets:    
Total available-for-sale securities 0.0 0.0
US Treasury Securities | Significant Unobservable Inputs (Level 3)    
Assets:    
Total available-for-sale securities $ 0.0 0.0
Commercial Paper    
Assets:    
Assets:   24.9
Commercial Paper | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Assets:   24.9
Commercial Paper | Significant Other Observable Inputs (Level 2)    
Assets:    
Assets:   0.0
Commercial Paper | Significant Unobservable Inputs (Level 3)    
Assets:    
Assets:   $ 0.0