Goodwill and Intangible Assets - Purchased Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020
Finite Lived Intangible Assets [Line Items]
Definite lives intangible assets, accumulated amortization	$ (115.0)	$ (81.6)
Definite lives intangible assets, net carrying amount	236.7
Intangible Assets, gross carrying value	360.7	242.1
Intangible Assets, net carrying value	245.7	160.5
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Definite lives intangible assets, gross carrying amount	188.4	119.4
Definite lives intangible assets, accumulated amortization	(66.9)	(50.6)
Definite lives intangible assets, net carrying amount	$ 121.5	68.8
Customer Relationships | Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	6 years
Customer Relationships | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	10 years
Trade Names
Finite Lived Intangible Assets [Line Items]
Definite lives intangible assets, gross carrying amount	$ 36.8	27.0
Definite lives intangible assets, accumulated amortization	(17.5)	(11.7)
Definite lives intangible assets, net carrying amount	$ 19.3	15.3
Trade Names | Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	4 years
Trade Names | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	6 years
Intellectual Property
Finite Lived Intangible Assets [Line Items]
Definite lives intangible assets, gross carrying amount	$ 49.4	13.9
Definite lives intangible assets, accumulated amortization	(13.1)	(9.8)
Definite lives intangible assets, net carrying amount	$ 36.3	4.1
Intellectual Property | Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	7 years
Intellectual Property | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	12 years
Backlog
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	1 year
Definite lives intangible assets, gross carrying amount	$ 4.3
Definite lives intangible assets, accumulated amortization	(3.9)
Definite lives intangible assets, net carrying amount	$ 0.4
Recipes [Member]
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	20 years
Definite lives intangible assets, gross carrying amount	$ 73.2	73.2
Definite lives intangible assets, accumulated amortization	(12.2)	(8.5)
Definite lives intangible assets, net carrying amount	$ 61.0	64.7
StandardOperatingProceduresMember
Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets Weighted Average Useful Life	20 years
Definite lives intangible assets, gross carrying amount	$ 8.6	8.6
Definite lives intangible assets, accumulated amortization	(1.4)	(1.0)
Definite lives intangible assets, net carrying amount	$ 7.2	$ 7.6