Fair Values of Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		$ 0	$ 0	$ 0
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount		0	0	0
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount		0	0	0
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net		0	$ 0	$ 0
Amount payable annually under acquisition related contingent consideration arrangements, value, low		25,000,000
Amount payable annually under acquisition related contingent consideration arrangements, value, high		$ 48,000,000
Distribution Agreements [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated useful life	40 years
Distribution Agreements [Member] | Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated useful life		40 years
Distribution Agreements [Member] | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated useful life		10 years