Industry Segment (Schedule of Customer Concentration to Consolidated Net Sales) (Detail)	3 Months Ended		9 Months Ended
	Sep. 29, 2012 Customer	Sep. 24, 2011 Customer	Sep. 29, 2012 Customer	Sep. 24, 2011 Customer
Revenue, Major Customer [Line Items]
Customers individually accounting for more than 10% of consolidated net sales	1	2	1	2
Percentage of consolidated net sales	39.00%	50.00%	41.00%	46.00%