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Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Sep. 27, 2025
Sep. 28, 2024
Assets:    
Fair Value $ 332.8 $ 651.2
Total 1,077.8 996.8
Liabilities:    
Contingent consideration   1.1
Total 6.1 13.9
Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Total 1,073.0 992.9
Liabilities:    
Contingent consideration   0.0
Total 0.0 0.0
Significant Other Observable Inputs (Level 2)    
Assets:    
Total 4.8 3.9
Liabilities:    
Contingent consideration   0.0
Total 6.1 12.8
Significant Unobservable Inputs (Level 3)    
Assets:    
Total 0.0 0.0
Liabilities:    
Contingent consideration   1.1
Total 0.0 1.1
Interest Rate Swap    
Assets:    
Interest rate caps - derivative 3.2 3.1
Liabilities:    
Interest rate swaps   0.2
Interest Rate Swap | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Interest rate caps - derivative 0.0 0.0
Liabilities:    
Interest rate swaps   0.0
Interest Rate Swap | Significant Other Observable Inputs (Level 2)    
Assets:    
Interest rate caps - derivative 3.2 3.1
Liabilities:    
Interest rate swaps   0.2
Interest Rate Swap | Significant Unobservable Inputs (Level 3)    
Assets:    
Interest rate caps - derivative 0.0 0.0
Liabilities:    
Interest rate swaps   0.0
Forward foreign currency contracts    
Assets:    
Forward foreign currency contracts 1.6  
Liabilities:    
Forward foreign currency contracts 6.1 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 1.6  
Liabilities:    
Forward foreign currency contracts 6.1 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
Stock Options    
Assets:    
Forward foreign currency contracts   0.8
Stock Options | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Forward foreign currency contracts   0.0
Stock Options | Significant Other Observable Inputs (Level 2)    
Assets:    
Forward foreign currency contracts   0.8
Stock Options | Significant Unobservable Inputs (Level 3)    
Assets:    
Forward foreign currency contracts   0.0
Money Market Funds    
Assets:    
Cash and cash equivalents 740.2 341.7
Money Market Funds | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents 740.2 341.7
Money Market Funds | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents 0.0 0.0
Money Market Funds | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents 0.0 0.0
US Treasury Securities    
Assets:    
Fair Value 332.8 626.3
US Treasury Securities | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Fair Value 332.8 626.3
US Treasury Securities | Significant Other Observable Inputs (Level 2)    
Assets:    
Fair Value 0.0 0.0
US Treasury Securities | Significant Unobservable Inputs (Level 3)    
Assets:    
Fair Value $ 0.0 0.0
Commercial Paper    
Assets:    
Cash and cash equivalents   24.9
Fair Value   24.9
Commercial Paper | Quoted Prices in Active Market for Identical Assets (Level 1)    
Assets:    
Cash and cash equivalents   24.9
Commercial Paper | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and cash equivalents   0.0
Commercial Paper | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and cash equivalents   $ 0.0