Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Apr. 01, 2017 USD ($) Vendor	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	$ 155.8
Operating Leases
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	$ 15.1	$ 15.9
Lease expiration dates	2022
Equipment and machinery
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	$ 5.7
Minimum
Commitments and Contingencies Disclosure [Line Items]
Company's current brewing and packaging percentage	95.00%
Barley and Wheat
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	$ 18.2
Number of suppliers | Vendor	2
Hops
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	$ 48.2
Hops, Barley and Wheat
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	66.4
Apples and other ingredients
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	22.4
Glass Bottles
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	13.1
Purchase commitments	13.1
Advertising Contracts
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	27.0
Other Commitments
Commitments and Contingencies Disclosure [Line Items]
Contractual obligations	$ 6.1