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
	Oct. 28, 2023	Oct. 29, 2022
Earnings Per Share [Abstract]
Net income	$ 3,638	$ 2,670
Weighted-average shares—basic (in shares)	4,057	4,108
Effect of dilutive potential common shares (in shares)	30	8
Weighted-average shares—diluted (in shares)	4,087	4,116
Net income per share—basic (in dollars per share)	$ 0.90	$ 0.65
Net income per share—diluted (in dollars per share)	$ 0.89	$ 0.65
Antidilutive employee share-based awards, excluded (in shares)	16	38