Condensed Consolidated Financial Statement Details - Other Income/(Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 01, 2017	Mar. 26, 2016	Apr. 01, 2017	Mar. 26, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest and dividend income	$ 1,282	$ 986	$ 2,506	$ 1,927
Interest expense	(530)	(321)	(1,055)	(597)
Other expense, net	(165)	(510)	(43)	(773)
Total other income/(expense), net	$ 587	$ 155	$ 1,408	$ 557