Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 27, 2008	Oct. 01, 2011	Oct. 02, 2010	Oct. 03, 2009
Summary Of Significant Accounting Policies [Line Items]
Percentage of sales accounted for using percentage of completion		29.00%
Percent of sales as units are delivered or services are performed		71.00%
Impairment charges of long-lived assets		$ 0	$ 0	$ 0
Impairment charges on goodwill		0	0	0
Effect on retained earnings due to adoption of measurement date provisions	991
Effect on accumulated other comprehensive income due to adoption of measurement date provisions	$ 142
Maximum [Member] | Computer Hardware [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		4
Minimum [Member] | Computer Hardware [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		3
Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		40
Building Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		15
Machinery And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		10
Tooling And Test Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		8
Furniture And Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of property plant and equipment, years		12