Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Shares of Common Stock	Common Stock and Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Jul. 31, 2021		4,217
Beginning balance at Jul. 31, 2021	$ 41,275		$ 42,346	$ (654)	$ (417)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,980			2,980
Other comprehensive loss	$ (56)				(56)
Issuance of common stock (in shares)		7
Repurchase of common stock (in shares)	(5)	(5)
Repurchase of common stock	$ (256)		(46)	(210)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(2)
Shares repurchased for tax withholdings on vesting of restricted stock units	(133)		(133)
Cash dividends declared	(1,561)			(1,561)
Share-based compensation	453		453
Other	(1)		1	(2)
Ending balance (in shares) at Oct. 30, 2021		4,217
Ending balance at Oct. 30, 2021	42,701		42,621	553	(473)
Beginning balance (in shares) at Jul. 30, 2022		4,110
Beginning balance at Jul. 30, 2022	39,773		42,714	(1,319)	(1,622)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,670			2,670
Other comprehensive loss	$ (496)				(496)
Issuance of common stock (in shares)		7
Repurchase of common stock (in shares)	(12)	(12)
Repurchase of common stock	$ (502)		(118)	(384)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(2)
Shares repurchased for tax withholdings on vesting of restricted stock units	(108)		(108)
Cash dividends declared	(1,560)			(1,560)
Share-based compensation	496		496
Other	(1)			(1)
Ending balance (in shares) at Oct. 29, 2022		4,103
Ending balance at Oct. 29, 2022	$ 40,272		$ 42,984	$ (594)	$ (2,118)