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Schedule of Derivative Instruments by Income Statement Location (Parenthetical) (Detail) (Commodity Contracts - Fuel)
3 Months Ended
Sep. 29, 2012
Sep. 24, 2011
Cost Of Goods Sold and Occupancy Costs
   
Derivative Instruments, Gain (Loss) [Line Items]    
Percentage of derivative loss recognized in earnings 60.00% 60.00%
Store and Warehouse Operating and Selling Expenses
   
Derivative Instruments, Gain (Loss) [Line Items]    
Percentage of derivative loss recognized in earnings 40.00% 40.00%