Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Summary Of Significant Accounting Policies [Line Items]
Equity investments under cost method	$ 21,400,000	$ 7,800,000
Foreign currency gain (loss) before tax	(1,400,000)	1,100,000	8,500,000
Impairment loss on equity investments in privately held companies	0	0	0
Number of customers accounted for more than 10% of total accounts receivable	0
Finite-lived intangible assets, useful life, minimum (years)	1
Finite lived intangible assets, useful life, maximum (years)	20
Impairment charges for long-lived assets and identifiable intangible assets	0	0	0
Goodwill impairment charges	0	0	0
Share-based compensation expenses	$ 42,000,000	$ 39,800,000	$ 42,600,000
Number of antidilutive securities excluded from computation of diluted weighted average shares outstanding	160,312	2,321,408	8,245,887
Weighted average exercise price	$ 57.38	$ 52.90	$ 46.82
Land Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (years)	15
Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives, (minimum)	at least twenty years
Land Leasehold Rights And Leasehold Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (description)	the lesser of estimated useful lives or remaining lease terms
Assets Subject To Lease [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (description)	the lesser of estimated useful lives or lease terms
Machinery And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life, minimum (years)	3
Property, plant and equipment, useful life, maximum (years)	7