Reporting Segment Information - Summary of Sales by Type of Similar Products and Services (Detail) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 31, 2016	Oct. 08, 2016	Jul. 16, 2016	Jan. 02, 2016	Oct. 10, 2015	Jul. 18, 2015	Apr. 23, 2016	Apr. 25, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Revenue from External Customer [Line Items]
Consolidated net sales	$ 1,828,183	$ 1,800,085	$ 1,827,562	$ 1,768,025	$ 1,775,401	$ 1,795,864	$ 2,278,770	$ 2,312,683	$ 7,734,600	$ 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									$ 110,619	$ 122,004	$ 178,111
Fuel [Member] | Sales Revenue [Member] | Product Concentration Risk [Member]
Revenue from External Customer [Line Items]
Consolidated net sales, Percentage									1.40%	1.60%	2.20%
Non Perishables [Member]
Revenue from External Customer [Line Items]
Consolidated net sales									$ 4,908,142	$ 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									63.50%	63.30%	63.10%
Perishables [Member]
Revenue from External Customer [Line Items]
Consolidated net sales									$ 2,359,829	$ 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									30.50%	31.00%	31.00%
Pharmacy [Member]
Revenue from External Customer [Line Items]
Consolidated net sales									$ 356,010	$ 310,377	$ 289,494
Pharmacy [Member] | Sales Revenue [Member] | Product Concentration Risk [Member]
Revenue from External Customer [Line Items]
Consolidated net sales, Percentage									4.60%	4.10%	3.70%