Net Income per Share - Calculation Of Basic And Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Earnings Per Share [Abstract]
Net income	$ 11,812	$ 10,591	$ 11,214
Weighted-average shares—basic (In shares)	4,170	4,222	4,236
Effect of dilutive potential common shares (in shares)	22	14	18
Weighted-average shares—diluted (in shares)	4,192	4,236	4,254
Net income per share—basic (in dollars per share)	$ 2.83	$ 2.51	$ 2.65
Net income per share—diluted (in dollars per share)	$ 2.82	$ 2.50	$ 2.64
Antidilutive employee share-based awards, excluded (in shares)	70	69	76