Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Numerator:
Net income	$ 21,744	$ 11,253	$ 74,129	$ 44,738
Denominator:
Weighted-average basic shares outstanding (in shares)	16,629,371	17,250,291	16,772,656	17,450,284
Effect of dilutive securities (in shares)	152,364	168,863	168,871	168,494
Weighted-average diluted shares (in shares)	16,781,735	17,419,154	16,941,527	17,618,778
Basic earnings per share (in dollars per share)	$ 1.31	$ 0.65	$ 4.42	$ 2.56
Diluted earnings per share (in dollars per share)	$ 1.30	$ 0.65	$ 4.38	$ 2.54