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Revenue - Additional Information (Detail)	12 Months Ended
	Dec. 29, 2018 USD ($) Commissary
Disaggregation Of Revenue [Line Items]
Revenue recognition performance obligation	$ 0
Revenue, remaining performance obligation, optional exemption, performance obligation	true
Revenue recognition payment terms	30 days
Contract assets	$ 0
Revenue, practical expedient, incremental cost of obtaining contract	true
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Revenue recognition contract terms	1 year
Manufacturers/brokers supplying DeCA [Member]
Disaggregation Of Revenue [Line Items]
Number of commissaries | Commissary	237

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