Condensed Consolidated Financial Statement Details - Other Income/(Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest and dividend income	$ 719	$ 901	$ 2,184	$ 2,995
Interest expense	(665)	(697)	(1,973)	(2,239)
Other income/(expense), net	189	(158)	585	(79)
Total other income/(expense), net	$ 243	$ 46	$ 796	$ 677