Selected Quarterly Financial Information (Unaudited) - Summary of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 26, 2020	Sep. 28, 2019	Sep. 29, 2018
Selected Quarterly Financial Information [Abstract]
Net sales	$ 64,698	$ 59,685	$ 58,313	$ 91,819	$ 64,040	$ 53,809	$ 58,015	$ 84,310	$ 274,515	$ 260,174	$ 265,595
Gross margin	24,689	22,680	22,370	35,217	24,313	20,227	21,821	32,031	104,956	98,392	101,839
Net income	$ 12,673	$ 11,253	$ 11,249	$ 22,236	$ 13,686	$ 10,044	$ 11,561	$ 19,965	$ 57,411	$ 55,256	$ 59,531
Earnings per share:
Basic (in dollars per share)	$ 0.74	$ 0.65	$ 0.64	$ 1.26	$ 0.76	$ 0.55	$ 0.62	$ 1.05	$ 3.31	$ 2.99	$ 3.00
Diluted (in dollars per share)	$ 0.73	$ 0.65	$ 0.64	$ 1.25	$ 0.76	$ 0.55	$ 0.61	$ 1.05	$ 3.28	$ 2.97	$ 2.98