Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 29, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite And Indefinite Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 0
Intangible asset amortization expense	$ 22,100,000		$ 23,000,000	$ 66,700,000	$ 68,400,000
Future amortization expense, in 2018	88,600,000			88,600,000
Future amortization expense, in 2019	86,700,000			86,700,000
Future amortization expense, in 2020	84,400,000			84,400,000
Future amortization expense, in 2021	83,100,000			83,100,000
Future amortization expense, in 2022	$ 80,800,000			$ 80,800,000
Minimum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life				5 years		5 years
Maximum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life				22 years		22 years