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		6 Months Ended
	Mar. 26, 2022	Mar. 27, 2021	Mar. 26, 2022	Mar. 27, 2021
Numerator:
Net income	$ 25,010	$ 23,630	$ 59,640	$ 52,385
Denominator:
Weighted-average basic shares outstanding (in shares)	16,278,802	16,753,476	16,335,263	16,844,298
Effect of dilutive securities (in shares)	124,514	175,681	126,041	177,125
Weighted-average diluted shares (in shares)	16,403,316	16,929,157	16,461,304	17,021,423
Basic earnings per share (in dollars per share)	$ 1.54	$ 1.41	$ 3.65	$ 3.11
Diluted earnings per share (in dollars per share)	$ 1.52	$ 1.40	$ 3.62	$ 3.08