Major Customers and Export Sales - Foreign Revenues by Country as Percentage of Total Foreign Revenue (Detail)	3 Months Ended
	Dec. 29, 2012	Dec. 24, 2011
North America (excluding the U.S.) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from geographical area as a percentage of foreign revenue
Central and South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from geographical area as a percentage of foreign revenue
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from geographical area as a percentage of foreign revenue
Mid-East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from geographical area as a percentage of foreign revenue	100.00%	100.00%
Far East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from geographical area as a percentage of foreign revenue