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Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) | Sep. 30, 2017 | Sep. 24, 2016
--- | --- | ---
Assets: |  |
Assets measured at fair value on a recurring basis | $ 5,300,000 | $ 2,600,000
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 47,200,000 | 38,300,000
Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 100,000 | 1,000,000
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 43,200,000 | 37,000,000
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 5,200,000 | 1,600,000
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 4,000,000 | 1,300,000
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 0 | 0
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0 | 0
Equity securities |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 100,000 | 1,000,000
Equity securities | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 100,000 | 1,000,000
Equity securities | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 0 | 0
Equity securities | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Assets measured at fair value on a recurring basis | 0 | 0
Interest rate caps - derivative |  |
Assets: |  |
Assets measured at fair value on a recurring basis |  | 1,400,000
Interest rate caps - derivative | 4,800,000 | 1,400,000
Interest rate caps - derivative | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Assets measured at fair value on a recurring basis |  | 0
Interest rate caps - derivative | 0 |
Interest rate caps - derivative | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Assets measured at fair value on a recurring basis |  | 1,400,000
Interest rate caps - derivative | 4,800,000 |
Interest rate caps - derivative | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Assets measured at fair value on a recurring basis |  | 0
Interest rate caps - derivative | 0 |
Deferred compensation liabilities |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 43,200,000 | 37,000,000
Deferred compensation liabilities | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 43,200,000 | 37,000,000
Deferred compensation liabilities | Significant Other Observable Inputs (Level 2) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0 | 0
Deferred compensation liabilities | Significant Unobservable Inputs (Level 3) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 0 | 0
Forward foreign currency contracts |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 1,300,000
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
Forward foreign currency contracts | Significant Other Observable Inputs (Level 2) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 1,300,000
Forward foreign currency contracts | Significant Unobservable Inputs (Level 3) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis |  | 0
Forward foreign currency contracts | Assets |  |
Assets: |  |
Interest rate caps - derivative |  | 200,000
Forward foreign currency contracts | 400,000 |
Forward foreign currency contracts | Assets | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate caps - derivative |  | 0
Forward foreign currency contracts | 0 |
Forward foreign currency contracts | Assets | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate caps - derivative |  | 200,000
Forward foreign currency contracts | 400,000 |
Forward foreign currency contracts | Assets | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate caps - derivative |  | $ 0
Forward foreign currency contracts | 0 |
Forward foreign currency contracts | Liability |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 4,000,000 |
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 |
Forward foreign currency contracts | Liability | Significant Other Observable Inputs (Level 2) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | 4,000,000 |
Forward foreign currency contracts | Liability | Significant Unobservable Inputs (Level 3) |  |
Liabilities: |  |
Liabilities measured at fair value on a recurring basis | $ 0 |

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