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Reporting Segment Information - Summary of Sales by Type of Similar Products and Services (Detail) - USD ($) $ in Thousands | 3 Months Ended | 4 Months Ended | 9 Months Ended | 12 Months Ended
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Jan. 02, 2016 | Oct. 10, 2015 | Jul. 18, 2015 | Jan. 03, 2015 | Oct. 04, 2014 | Jul. 12, 2014 | Apr. 25, 2015 | Apr. 19, 2014 | Dec. 28, 2013 | Jan. 02, 2016 | Jan. 03, 2015
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales | $ 1,768,025 | $ 1,775,401 | $ 1,795,864 | $ 1,962,589 | $ 1,809,571 | $ 1,810,175 | $ 2,312,683 | $ 2,333,727 | $ 2,597,230 | $ 7,651,973 | $ 7,916,062
Sales Revenue [Member] | Product Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales, Percentage |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Fuel [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales |  |  |  |  |  |  |  |  | $ 145,631 | $ 122,004 | $ 178,111
Fuel [Member] | Sales Revenue [Member] | Product Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales, Percentage |  |  |  |  |  |  |  |  | 5.60% | 1.60% | 2.20%
Non Perishables [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales |  |  |  |  |  |  |  |  | $ 1,393,157 | $ 4,845,763 | $ 4,998,895
Non Perishables [Member] | Sales Revenue [Member] | Product Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales, Percentage |  |  |  |  |  |  |  |  | 53.60% | 63.30% | 63.10%
Perishables [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales |  |  |  |  |  |  |  |  | $ 894,783 | $ 2,373,829 | $ 2,449,562
Perishables [Member] | Sales Revenue [Member] | Product Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales, Percentage |  |  |  |  |  |  |  |  | 34.50% | 31.00% | 31.00%
Pharmacy [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales |  |  |  |  |  |  |  |  | $ 163,659 | $ 310,377 | $ 289,494
Pharmacy [Member] | Sales Revenue [Member] | Product Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated net sales, Percentage |  |  |  |  |  |  |  |  | 6.30% | 4.10% | 3.70%

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