Summary Of Significant Accounting Policies (Schedule Of Property And Equipment Which Are Depreciated Over Estimated Useful Lives) (Details)	12 Months Ended
	Sep. 24, 2011
Building And Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, minimum, in years	35
Property and equipment, estimated useful life, maximum, in years	40
Equipment And Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, minimum, in years	3
Property and equipment, estimated useful life, maximum, in years	10
Equipment Under Customer Usage Agreements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, minimum, in years	3
Property and equipment, estimated useful life, maximum, in years	8
Furniture And Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, minimum, in years	5
Property and equipment, estimated useful life, maximum, in years	7
Leasehold Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, in years	Shorter of the Original Term of Lease or Estimated Useful Life