Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 25, 2016	Mar. 27, 2015	Mar. 25, 2016	Mar. 27, 2015	Sep. 25, 2015
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 2,152		$ 2,152		$ 2,240
Accumulated Amortization	(717)		(717)		(685)
Net Carrying Amount	1,435		1,435		1,555
Finite-lived intangible assets, amortization expense	34	$ 38	68	$ 80
Aggregate amortization expense on intangible assets
Remainder of fiscal 2016	67		67
Fiscal 2017	133		133
Fiscal 2018	132		132
Fiscal 2019	131		131
Fiscal 2020	126		126
Fiscal 2021	123		123
Thereafter	723		723
Intellectual property
Finite-Lived Intangible Assets
Gross Carrying Amount	1,087		1,087		1,150
Accumulated Amortization	(522)		(522)		(524)
Net Carrying Amount	565		565		626
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	1,030		1,030		1,053
Accumulated Amortization	(181)		(181)		(148)
Net Carrying Amount	849		849		905
Other.
Finite-Lived Intangible Assets
Gross Carrying Amount	35		35		37
Accumulated Amortization	(14)		(14)		(13)
Net Carrying Amount	$ 21		$ 21		$ 24