Acquisition - No Frills (Detail) (USD $)	4 Months Ended		9 Months Ended		4 Months Ended		9 Months Ended		4 Months Ended
	Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012 Food Distribution [Member] Acquisition – No Frills[Member]	Oct. 06, 2012 Accounts Payable Due to the Company from No Frills [Member] Acquisition – No Frills[Member]	Oct. 06, 2012 Selling, General and Administrative Expenses [Member] Acquisition – No Frills[Member]	Oct. 06, 2012 Acquisition – No Frills[Member] Account Receivable Due to No Frills from the Company [Member]	Oct. 06, 2012 Acquisition – No Frills[Member]	Jun. 25, 2012 Acquisition – No Frills[Member]
Business Acquisition, Cost of Acquired Entity, Cash Paid										$ 49,300,000
Fair Value of Assets Acquired, Net										26,413,000
Goodwill, Acquired During Period									22,900,000
Business Acquisition, Purchase Price Allocation, Current Assets, Account Receivables								500,000		1,893,000
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable						2,300,000				3,910,000
Business Combination, Acquisition Related Costs							600,000
Revenue, Net	$ 1,496,343,000	$ 1,471,357,000	$ 3,647,775,000	$ 3,670,741,000	$ (33,400,000)				$ 62,000,000