Business Segments and Geographic Information - Revenues by Geography (Detail)	3 Months Ended
	Dec. 29, 2012	Dec. 24, 2011
Schedule Of Geographical Segments [Line Items]
Revenues	100.00%	100.00%
United States [Member]
Schedule Of Geographical Segments [Line Items]
Revenues	72.00%	75.00%
Europe [Member]
Schedule Of Geographical Segments [Line Items]
Revenues	14.00%	12.00%
Asia [Member]
Schedule Of Geographical Segments [Line Items]
Revenues	9.00%	7.00%
All others [Member]
Schedule Of Geographical Segments [Line Items]
Revenues	5.00%	6.00%