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Operating Segment Information - Summary of Sales by Type of Similar Products and Services (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Oct. 04, 2014
Oct. 12, 2013
Oct. 04, 2014
Oct. 12, 2013
Revenue from External Customer [Line Items]        
Net sales $ 1,809,571 $ 630,088 $ 5,953,473 $ 2,061,491
Percentage Consolidated Net Sale 100.00% 100.00% 100.00% 100.00%
Fuel [Member]
        
Revenue from External Customer [Line Items]        
Net sales 42,458 43,300 143,839 145,122
Percentage Consolidated Net Sale 2.30% 6.90% 2.40% 7.10%
Non Perishables [Member]
        
Revenue from External Customer [Line Items]        
Net sales 1,146,410 312,038 3,753,373 1,012,545
Percentage Consolidated Net Sale 63.40% 49.50% 63.10% 49.10%
Perishables [Member]
        
Revenue from External Customer [Line Items]        
Net sales 554,970 223,841 1,840,802 740,582
Percentage Consolidated Net Sale 30.70% 35.50% 30.90% 35.90%
Pharmacy [Member]
        
Revenue from External Customer [Line Items]        
Net sales $ 65,733 $ 50,909 $ 215,459 $ 163,242
Percentage Consolidated Net Sale 3.60% 8.10% 3.60% 7.90%