Condensed Consolidated Financial Statement Details - Other Income/(Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest and dividend income	$ 901	$ 1,190	$ 2,995	$ 3,855
Interest expense	(697)	(866)	(2,239)	(2,766)
Other income/(expense), net	(158)	43	(79)	216
Total other income/(expense), net	$ 46	$ 367	$ 677	$ 1,305