Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) $ in Millions	Dec. 26, 2020 USD ($)
Assets:
Assets measured at fair value on a recurring basis	$ 0.8
Liabilities:
Total	123.1
Foreign currency option contracts
Assets:
Assets measured at fair value on a recurring basis	0.8
Forward foreign currency contracts \| Liability
Assets:
Assets measured at fair value on a recurring basis	6.0
Contingent Consideration Type
Liabilities:
Contingent consideration	86.4
Interest Rate Swap
Assets:
Assets measured at fair value on a recurring basis	30.7
Quoted Prices in Active Market for Identical Assets (Level 1)
Assets:
Assets measured at fair value on a recurring basis	0.0
Liabilities:
Total	0.0
Quoted Prices in Active Market for Identical Assets (Level 1) \| Foreign currency option contracts
Assets:
Assets measured at fair value on a recurring basis	0.0
Quoted Prices in Active Market for Identical Assets (Level 1) \| Forward foreign currency contracts \| Liability
Assets:
Assets measured at fair value on a recurring basis	0.0
Quoted Prices in Active Market for Identical Assets (Level 1) \| Contingent Consideration Type
Liabilities:
Contingent consideration	0.0
Quoted Prices in Active Market for Identical Assets (Level 1) \| Interest Rate Swap
Assets:
Assets 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	0.8
Liabilities:
Total	36.7
Significant Other Observable Inputs (Level 2) \| Foreign currency option contracts
Assets:
Assets measured at fair value on a recurring basis	0.8
Significant Other Observable Inputs (Level 2) \| Forward foreign currency contracts \| Liability
Assets:
Assets measured at fair value on a recurring basis	6.0
Significant Other Observable Inputs (Level 2) \| Contingent Consideration Type
Liabilities:
Contingent consideration	0.0
Significant Other Observable Inputs (Level 2) \| Interest Rate Swap
Assets:
Assets measured at fair value on a recurring basis	30.7
Significant Unobservable Inputs (Level 3)
Assets:
Assets measured at fair value on a recurring basis	0.0
Liabilities:
Total	86.4
Significant Unobservable Inputs (Level 3) \| Foreign currency option contracts
Assets:
Assets measured at fair value on a recurring basis	0.0
Significant Unobservable Inputs (Level 3) \| Forward foreign currency contracts \| Liability
Assets:
Assets measured at fair value on a recurring basis	0.0
Significant Unobservable Inputs (Level 3) \| Contingent Consideration Type
Liabilities:
Contingent consideration	86.4
Significant Unobservable Inputs (Level 3) \| Interest Rate Swap
Assets:
Assets measured at fair value on a recurring basis	$ 0.0

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Fair value of contingent consideration in a business combination that is classified in shareholders' equity.

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Fair value of obligations measured on a recurring basis.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 820
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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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