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Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Millions | Dec. 28, 2024 | Sep. 28, 2024
--- | --- | ---
Assets: |  |
Total available-for-sale securities | $ 406.6 | $ 992.9
Total | 426.1 | 996.8
Liabilities: |  |
Contingent consideration | 1.1 | 1.1
Total | 1.1 | 13.9
Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Total | 406.6 | 992.9
Liabilities: |  |
Contingent consideration | 0.0 | 0.0
Total | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Total | 19.5 | 3.9
Liabilities: |  |
Contingent consideration | 0.0 | 0.0
Total | 0.0 | 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 | 9.4 | 3.1
Liabilities: |  |
Interest Rate Cash Flow Hedge Liability at Fair Value |  | 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 Cash Flow Hedge Liability at Fair Value |  | 0.0
Interest Rate Swap | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate swaps | 9.4 | 3.1
Liabilities: |  |
Interest Rate Cash Flow Hedge Liability at Fair Value |  | 0.2
Interest Rate Swap | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate swaps | 0.0 | 0.0
Liabilities: |  |
Interest Rate Cash Flow Hedge Liability at Fair Value |  | 0.0
Foreign currency option contracts |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.4 | 0.8
Foreign currency option contracts | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.0 | 0.0
Foreign currency option contracts | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.4 | 0.8
Foreign currency option contracts | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.0 | 0.0
Forward foreign currency contracts |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 9.7 |
Liabilities: |  |
Foreign Currency Contracts, Liability, Fair Value Disclosure |  | 12.6
Forward foreign currency contracts | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.0 |
Liabilities: |  |
Foreign Currency Contracts, Liability, Fair Value Disclosure |  | 0.0
Forward foreign currency contracts | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 9.7 |
Liabilities: |  |
Foreign Currency Contracts, Liability, Fair Value Disclosure |  | 12.6
Forward foreign currency contracts | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Foreign Currency Contract, Asset, Fair Value Disclosure | 0.0 |
Liabilities: |  |
Foreign Currency Contracts, Liability, Fair Value Disclosure |  | 0.0
Money Market Funds |  |
Assets: |  |
Assets: | 152.1 | 341.7
Money Market Funds | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Assets: | 152.1 | 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 | 254.5 | 626.3
US Treasury Securities | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Total available-for-sale securities | 254.5 | 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

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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