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Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions | Sep. 28, 2019 | Sep. 29, 2018
--- | --- | ---
Assets: |  |
Assets measured at fair value on a recurring basis | $ 7.7 | $ 10.9
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 9.2 | 8.0
Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 0.0 | 0.0
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 7.7 | 10.9
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.1 | 0.2
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 0.0 | 0.0
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 9.1 | 7.8
Interest rate caps - derivative |  |
Assets: |  |
Interest rate caps - derivative | 0.1 | 7.7
Interest rate caps - derivative | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate caps - derivative | 0.0 | 0.0
Interest rate caps - derivative | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate caps - derivative | 0.1 | 7.7
Interest rate caps - derivative | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate caps - derivative | 0.0 | 0.0
Interest Rate Swap [Member] |  |
Assets: |  |
Interest rate caps - derivative | 4.7 |
Interest Rate Swap [Member] | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate caps - derivative | 0.0 |
Interest Rate Swap [Member] | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate caps - derivative | 4.7 |
Interest Rate Swap [Member] | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate caps - derivative | 0.0 |
Stock Options |  |
Assets: |  |
Forward foreign currency contracts | 2.0 |
Stock Options | Assets | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Forward foreign currency contracts | 0.0 |
Stock Options | Assets | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Forward foreign currency contracts | 2.0 |
Stock Options | Assets | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Forward foreign currency contracts | 0.0 |
Contingent consideration |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 9.1 | 7.8
Contingent consideration | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.0 | 0.0
Contingent consideration | Significant Other Observable Inputs (Level 2) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.0 | 0.0
Contingent consideration | Significant Unobservable Inputs (Level 3) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 9.1 | 7.8
Forward foreign currency contracts |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 0.2
Forward foreign currency contracts | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 0.0
Forward foreign currency contracts | Significant Other Observable Inputs (Level 2) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 0.2
Forward foreign currency contracts | Significant Unobservable Inputs (Level 3) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 0.0
Forward foreign currency contracts | Assets |  |
Assets: |  |
Interest rate caps - derivative |  | 7.7
Forward foreign currency contracts | 0.9 | 3.2
Forward foreign currency contracts | Assets | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Forward foreign currency contracts | 0.0 | 0.0
Forward foreign currency contracts | Assets | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Forward foreign currency contracts | 0.9 | 3.2
Forward foreign currency contracts | Assets | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Forward foreign currency contracts | 0.0 | $ 0.0
Forward foreign currency contracts | Liability |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.1 |
Forward foreign currency contracts | Liability | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.0 |
Forward foreign currency contracts | Liability | Significant Other Observable Inputs (Level 2) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0.1 |
Forward foreign currency contracts | Liability | Significant Unobservable Inputs (Level 3) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | $ 0.0 |

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