Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($)	12 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 26, 2020
Assets:
Assets measured at fair value on a recurring basis	$ 65,300,000	$ 1,700,000
Contingent consideration	11,400,000	58,800,000
Liabilities:
Liabilities measured at fair value on a recurring basis	23,400,000	94,400,000
Fair value adjustments	(39,500,000)	(6,700,000)	$ 300,000
Contingent consideration recorded at acquisition	0	0	$ 82,700,000
Quoted Prices in Active Market for Identical Assets (Level 1)
Assets:
Assets measured at fair value on a recurring basis	0	0
Liabilities:
Liabilities measured at fair value on a recurring basis	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Assets measured at fair value on a recurring basis	65,300,000	1,700,000
Liabilities:
Liabilities measured at fair value on a recurring basis	0	19,300,000
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	23,400,000	75,100,000
Interest Rate Swap
Liabilities:
Interest rate caps - derivative	38,900,000
Interest Rate Swap | Quoted Prices in Active Market for Identical Assets (Level 1)
Liabilities:
Interest rate caps - derivative	0
Interest Rate Swap | Significant Other Observable Inputs (Level 2)
Liabilities:
Interest rate caps - derivative	38,900,000
Interest Rate Swap | Significant Unobservable Inputs (Level 3)
Liabilities:
Interest rate caps - derivative	0
Interest Rate Swap | Liability
Liabilities:
Interest rate caps - derivative		18,700,000
Interest Rate Swap | Liability | Significant Other Observable Inputs (Level 2)
Assets:
Assets measured at fair value on a recurring basis		18,700,000
Foreign Exchange Forward [Member] | Assets
Assets:
Forward foreign currency contracts	1,700,000
Foreign Exchange Forward [Member] | Assets | Quoted Prices in Active Market for Identical Assets (Level 1)
Assets:
Forward foreign currency contracts	0	0
Foreign Exchange Forward [Member] | Assets | Significant Other Observable Inputs (Level 2)
Assets:
Forward foreign currency contracts	26,400,000	1,700,000
Foreign Exchange Forward [Member] | Assets | Significant Unobservable Inputs (Level 3)
Assets:
Forward foreign currency contracts	0	0
Foreign Exchange Forward [Member] | Liability
Liabilities:
Liabilities measured at fair value on a recurring basis		600,000
Foreign Exchange Forward [Member] | Liability | Quoted Prices in Active Market for Identical Assets (Level 1)
Liabilities:
Liabilities measured at fair value on a recurring basis		0
Foreign Exchange Forward [Member] | Liability | Significant Other Observable Inputs (Level 2)
Liabilities:
Liabilities measured at fair value on a recurring basis		600,000
Foreign Exchange Forward [Member] | Liability | Significant Unobservable Inputs (Level 3)
Liabilities:
Liabilities measured at fair value on a recurring basis		0
contingent consideration
Assets:
Contingent consideration	23,400,000
contingent consideration | Quoted Prices in Active Market for Identical Assets (Level 1)
Liabilities:
Liabilities measured at fair value on a recurring basis	0
contingent consideration | Significant Other Observable Inputs (Level 2)
Liabilities:
Liabilities measured at fair value on a recurring basis	0
contingent consideration | Significant Unobservable Inputs (Level 3)
Liabilities:
Liabilities measured at fair value on a recurring basis	23,400,000
contingent consideration | Liability
Assets:
Contingent consideration		75,100,000
contingent consideration | Liability | Quoted Prices in Active Market for Identical Assets (Level 1)
Liabilities:
Liabilities measured at fair value on a recurring basis		0
contingent consideration | Liability | Significant Other Observable Inputs (Level 2)
Liabilities:
Liabilities measured at fair value on a recurring basis		0
contingent consideration | Liability | Significant Unobservable Inputs (Level 3)
Liabilities:
Liabilities measured at fair value on a recurring basis		$ 75,100,000
Foreign Exchange Contract
Assets:
Assets measured at fair value on a recurring basis	$ 26,400,000