Derivative Instruments And Hedging Activity (Summary Of Derivatives Not Designated As Hedging Instruments) (Details) (Derivatives Not Designated As Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 24, 2011		Sep. 25, 2010		Sep. 24, 2011		Sep. 25, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in earnings	$ 215				$ 703
Commodity Contracts - Fuel [Member] | Cost Of Goods Sold And Occupancy Cost & Store And Warehouse Operating And Selling Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in earnings	435	[1]		[1]	3,431	[1]		[1]
Foreign Exchange Contracts [Member] | Miscellaneous Income, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in earnings	$ (220)				$ (2,728)
Store And Warehouse Operating And Selling Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Percentage of derivative loss recognized in earnings					40.00%
Cost Of Goods Sold And Occupancy Costs [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Percentage of derivative loss recognized in earnings					60.00%

[1] Approximately 60% of the amounts for 2011 and 2010 are reflected in cost of goods sold and occupancy costs. The remaining 40% of the amounts are reflected in store and warehouse operating and selling expenses.