Weighted Percentage of Sales from Largest Customers (Detail) - Customer Concentration Risk - Total year to date sales - Wal-Mart/Sam's Club	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	20.30%	20.00%	19.60%
DSD Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	17.90%	17.60%	17.00%
Warehouse Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	2.40%	2.40%	2.60%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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