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	8,997			8,997
Other comprehensive income (loss)	(1,046)				(1,046)
Issuance of common stock (in shares)		36
Issuance of common stock	306		306
Repurchase of common stock (in shares)		(92)
Repurchase of common stock	(5,332)		(929)	(4,403)
Shares repurchased for tax withholdings on vesting of restricted stock units and other (in shares)		(10)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(546)		(546)
Cash dividends declared	(4,657)			(4,657)
Share-based compensation	1,407		1,407
Other (in shares)		(2)
Other	(4)		3	(7)
Ending balance (in shares) at Apr. 30, 2022		4,149
Ending balance at Apr. 30, 2022	40,400		42,587	(724)	(1,463)
Beginning balance (in shares) at Jan. 29, 2022		4,151
Beginning balance at Jan. 29, 2022	39,496		42,291	(2,006)	(789)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,044			3,044
Other comprehensive income (loss)	(674)				(674)
Issuance of common stock (in shares)		7
Issuance of common stock	$ 0
Repurchase of common stock (in shares)	(5)	(5)
Repurchase of common stock	$ (252)		(47)	(205)
Shares repurchased for tax withholdings on vesting of restricted stock units and other (in shares)		(2)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(135)		(135)
Cash dividends declared	(1,555)			(1,555)
Share-based compensation	477		477
Other (in shares)		(2)
Other	(1)		1	(2)
Ending balance (in shares) at Apr. 30, 2022		4,149
Ending balance at Apr. 30, 2022	$ 40,400		42,587	(724)	(1,463)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock (in shares)	(54)
Ending balance (in shares) at Jul. 30, 2022		4,110
Ending balance at Jul. 30, 2022	$ 39,773		42,714	(1,319)	(1,622)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,655			8,655
Other comprehensive income (loss)	16				16
Issuance of common stock (in shares)		38
Issuance of common stock	316		316
Repurchase of common stock (in shares)		(63)
Repurchase of common stock	(3,017)		(664)	(2,353)
Shares repurchased for tax withholdings on vesting of restricted stock units and other (in shares)		(10)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(449)		(449)
Cash dividends declared	(4,713)			(4,713)
Share-based compensation	1,720		1,720
Other	(6)		2	(8)
Ending balance (in shares) at Apr. 29, 2023		4,075
Ending balance at Apr. 29, 2023	42,295		43,639	262	(1,606)
Beginning balance (in shares) at Jan. 28, 2023		4,095
Beginning balance at Jan. 28, 2023	41,474		43,424	(364)	(1,586)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,212			3,212
Other comprehensive income (loss)	(20)				(20)
Issuance of common stock (in shares)		8
Issuance of common stock	$ 0
Repurchase of common stock (in shares)	(25)	(25)
Repurchase of common stock	$ (1,259)		(270)	(989)
Shares repurchased for tax withholdings on vesting of restricted stock units and other (in shares)		(3)
Shares repurchased for tax withholdings on vesting of restricted stock units and other	(139)		(139)
Cash dividends declared	(1,593)			(1,593)
Share-based compensation	623		623
Other	(3)		1	(4)
Ending balance (in shares) at Apr. 29, 2023		4,075
Ending balance at Apr. 29, 2023	$ 42,295		$ 43,639	$ 262	$ (1,606)