Net Income per Share - Calculation of Basic and Diluted Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	Apr. 29, 2023	Apr. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 3,212	$ 3,044	$ 8,655	$ 8,997
Weighted-average shares—basic (in shares)	4,089	4,152	4,100	4,184
Effect of dilutive potential common shares (in shares)	21	18	11	20
Weighted-average shares—diluted (in shares)	4,110	4,170	4,111	4,204
Net income per share—basic (in dollars per share)	$ 0.79	$ 0.73	$ 2.11	$ 2.15
Net income per share—diluted (in dollars per share)	$ 0.78	$ 0.73	$ 2.11	$ 2.14
Antidilutive employee share-based awards, excluded (in shares)	24	11	75	46