Sales By Product Group Information (Detail) (Sales)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Product Information [Line Items]
Sales	100.00%	100.00%	100.00%
Supplies
Product Information [Line Items]
Sales	46.60%	45.80%	44.60%
Technology
Product Information [Line Items]
Sales	40.60%	41.80%	43.50%
Furniture And Other
Product Information [Line Items]
Sales	12.80%	12.40%	11.90%