Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018 USD ($) Customer	Apr. 01, 2017 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Significant Accounting Policies [Line Items]
Retained earnings	$ 340,700,000		$ (12,200,000)
Deferred gains			$ 7,900,000	$ 19,900,000
Route Based Services and Coffee, Tea and Extract Solutions [Member] | Selling, General and Administrative Expenses [Member]
Significant Accounting Policies [Line Items]
Shipping and handling costs	113,800,000	$ 106,300,000
Difference Between Revenue Guidance in Effect before and After Topic 606 [Member]
Significant Accounting Policies [Line Items]
Retained earnings	$ 0
Direct-to-Consumer Products [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Number of customers | Customer	2,400,000