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
Balance, beginning 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 and other (in shares)		(13)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,613			12,613
Other comprehensive income (loss)	47				47
Issuance of common stock (in shares)		57
Issuance of common stock	$ 700		700
Repurchase of common stock (in shares)	(88)	(88)
Repurchase of common stock	$ (4,271)		(930)	(3,341)
Shares repurchased for tax withholdings on vesting of restricted stock units and other (in shares)		(13)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(551)		(551)
Cash dividends declared	(6,302)			(6,302)
Share-based compensation	2,353		2,353
Other	(9)		3	(12)
Ending balance (in shares) at Jul. 29, 2023		4,066
Balance, end of period at Jul. 29, 2023	44,353		44,289	1,639	(1,575)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,320			10,320
Other comprehensive income (loss)	145				145
Issuance of common stock (in shares)		78
Issuance of common stock	$ 714		714
Repurchase of common stock (in shares)	(117)	(117)
Repurchase of common stock	$ (5,764)		(1,292)	(4,472)
Shares repurchased for tax withholdings on vesting of restricted stock units and other (in shares)		(20)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(997)		(997)
Cash dividends declared	(6,384)			(6,384)
Share-based compensation	3,074		3,074
Other	(4)		12	(16)
Ending balance (in shares) at Jul. 27, 2024		4,007
Balance, end of period at Jul. 27, 2024	$ 45,457		$ 45,800	$ 1,087	$ (1,430)