Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 25, 2025	Jan. 27, 2024	Jan. 25, 2025	Jan. 27, 2024
Earnings Per Share [Abstract]
Net income	$ 2,428	$ 2,634	$ 5,139	$ 6,272
Weighted-average shares—basic (in shares)	3,981	4,055	3,986	4,056
Effect of dilutive potential common shares (in shares)	24	18	22	23
Weighted-average shares—diluted (in shares)	4,005	4,073	4,008	4,079
Net income per share—basic (in dollars per share)	$ 0.61	$ 0.65	$ 1.29	$ 1.55
Net income per share—diluted (in dollars per share)	$ 0.61	$ 0.65	$ 1.28	$ 1.54
Antidilutive employee share-based awards, excluded (in shares)	22	58	59	56