Business Segments And Geographic Information (Schedule Of Revenues By Geography) (Details) (Revenues [Member])	3 Months Ended
	Dec. 24, 2011	Dec. 25, 2010
Segment Reporting Information [Line Items]
Percentage of total revenues	100.00%	100.00%
United States [Member]
Segment Reporting Information [Line Items]
Percentage of total revenues	75.00%	78.00%
Europe [Member]
Segment Reporting Information [Line Items]
Percentage of total revenues	12.00%	12.00%
Asia [Member]
Segment Reporting Information [Line Items]
Percentage of total revenues	7.00%	5.00%
All Others [Member]
Segment Reporting Information [Line Items]
Percentage of total revenues	6.00%	5.00%