Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Shares of Common Stock	Common Stock and Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Accumulated Deficit
Beginning balance (in shares) at Jul. 27, 2019		4,250
Balance, beginning of period at Jul. 27, 2019	$ 33,571		$ 40,266	$ (5,903)	$ (792)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,214			11,214
Other comprehensive income (loss)	273				273
Issuance of common stock (in shares)		61
Issuance of common stock	$ 655		655
Repurchase of common stock (in shares)	(59)	(59)
Repurchase of common stock	$ (2,619)		(561)	(2,058)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(15)
Shares repurchased for tax withholdings on vesting of restricted stock units	(727)		(727)
Cash dividends declared	(6,016)			(6,016)
Share-based compensation	1,569		1,569
Ending balance (in shares) at Jul. 25, 2020		4,237
Balance, end of period at Jul. 25, 2020	37,920		41,202	(2,763)	(519)	$ (38)	$ (38)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,591			10,591
Other comprehensive income (loss)	102				102
Issuance of common stock (in shares)		58
Issuance of common stock	$ 643		643
Repurchase of common stock (in shares)	(64)	(64)
Repurchase of common stock	$ (2,902)		(625)	(2,277)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(14)
Shares repurchased for tax withholdings on vesting of restricted stock units	(636)		(636)
Cash dividends declared	(6,166)			(6,166)
Share-based compensation	1,761		1,761
Other	0		1	(1)
Ending balance (in shares) at Jul. 31, 2021		4,217
Balance, end of period at Jul. 31, 2021	41,275		42,346	(654)	(417)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,812			11,812
Other comprehensive income (loss)	(1,205)				(1,205)
Issuance of common stock (in shares)		54
Issuance of common stock	$ 660		660
Repurchase of common stock (in shares)	(146)	(146)
Repurchase of common stock	$ (7,734)		(1,490)	(6,244)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(13)
Shares repurchased for tax withholdings on vesting of restricted stock units	(692)		(692)
Cash dividends declared	(6,224)			(6,224)
Share-based compensation	1,886		1,886
Other (in shares)		(2)
Other	(5)		4	(9)
Ending balance (in shares) at Jul. 30, 2022		4,110
Balance, end of period at Jul. 30, 2022	$ 39,773		$ 42,714	$ (1,319)	$ (1,622)