Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 27, 2024	Jan. 28, 2023	Jan. 27, 2024	Jan. 28, 2023
Earnings Per Share [Abstract]
Net income	$ 2,634	$ 2,773	$ 6,272	$ 5,443
Weighted-average shares—basic (in shares)	4,055	4,103	4,056	4,105
Effect of dilutive potential common shares (in shares)	18	13	23	10
Weighted-average shares—diluted (in shares)	4,073	4,116	4,079	4,115
Net income per share—basic (in dollars per share)	$ 0.65	$ 0.68	$ 1.55	$ 1.33
Net income per share—diluted (in dollars per share)	$ 0.65	$ 0.67	$ 1.54	$ 1.32
Antidilutive employee share-based awards, excluded (in shares)	58	17	56	91