Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 26, 2016 USD ($) Vendor
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	$ 168.0
Equipment and machinery
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	$ 23.0
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	$ 15.2
Number of suppliers | Vendor	2
Hops
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	$ 47.5
Glass Bottles
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	17.4
Hops, Barley and Wheat
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	62.7
Apples and other ingredients
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	40.3
Advertising Contracts
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	20.7
Other Commitments
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	$ 3.9