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Associate Retirement Plans - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended 9 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Jul. 12, 2014
Central States, Southeast and Southwest Areas Pension Fund [Member]
Jul. 20, 2013
Central States, Southeast and Southwest Areas Pension Fund [Member]
Dec. 28, 2013
Central States, Southeast and Southwest Areas Pension Fund [Member]
Jul. 12, 2014
Super Foods Pension Plan [Member]
Jul. 12, 2014
Super Foods Pension Plan [Member]
Jan. 03, 2015
Super Foods Pension Plan [Member]
Forecast [Member]
Jul. 12, 2014
Cash Balance Pension Plan [Member]
Jan. 03, 2015
Cash Balance Pension Plan [Member]
Forecast [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]                
Standard pension funding carryover       $ 0.9 $ 0.9 $ 2.4 $ 0 $ 0
Pension contributions during plan year $ 7.3 $ 5.1 $ 6.8          
Maximum company contribution as percentage of total employer contributions 5.00%