Composition of Certain Financial Statement Items Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Property, Plant and Equipment [Abstract]
Land	$ 212	$ 225
Buildings and improvements	1,544	1,456
Computer equipment and software	1,422	1,349
Machinery and equipment	2,287	2,117
Furniture and office equipment	83	85
Leasehold improvements	274	247
Construction in progress	72	201
Property, Plant and Equipment - Gross	5,894	5,680
Less accumulated depreciation and amortization	(3,360)	(3,193)
Property, plant and equipment, net	2,534	2,487
Depreciation and amortization expense	$ 625	$ 609	$ 515