Property, Plant, and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Net property, plant, and equipment
Gross property, plant, and equipment	$ 8,637	$ 8,766
Accumulated depreciation	(5,717)	(5,846)
Property, plant, and equipment, net	2,920	2,920	$ 2,951
Depreciation expense	463	467	$ 456
Land and improvements
Net property, plant, and equipment
Gross property, plant, and equipment	163	185
Buildings and improvements
Net property, plant, and equipment
Gross property, plant, and equipment	1,261	1,244
Machinery and equipment
Net property, plant, and equipment
Gross property, plant, and equipment	6,692	6,787
Construction in process
Net property, plant, and equipment
Gross property, plant, and equipment	$ 521	$ 550