Basis Of Presentation (Effect Of Largest Customer In Sales) (Details)	3 Months Ended		6 Months Ended
	Jul. 16, 2011	Jul. 17, 2010	Jul. 16, 2011	Jul. 17, 2010
Percentage of sales, Total	22.10%	22.10%	22.00%	21.60%
DSD [Member]
Percentage of sales, Total	18.30%	18.60%	18.10%	18.40%
Warehouse Delivery [Member]
Percentage of sales, Total	3.80%	3.50%	3.90%	3.20%