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]
Repurchase of common stock (in shares)	(5)
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. 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	5,953			5,953
Other comprehensive income (loss)	(372)				(372)
Issuance of common stock (in shares)		29
Issuance of common stock	306		306
Repurchase of common stock (in shares)		(87)
Repurchase of common stock	(5,080)		(882)	(4,198)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(8)
Shares repurchased for tax withholdings on vesting of restricted stock units	(411)		(411)
Cash dividends declared	(3,102)			(3,102)
Share-based compensation	930		930
Other	(3)		2	(5)
Ending balance (in shares) at Jan. 29, 2022		4,151
Ending balance at Jan. 29, 2022	39,496		42,291	(2,006)	(789)
Beginning balance (in shares) at Oct. 30, 2021		4,217
Beginning balance at Oct. 30, 2021	42,701		42,621	553	(473)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,973			2,973
Other comprehensive income (loss)	(316)				(316)
Issuance of common stock (in shares)		22
Issuance of common stock	$ 306		306
Repurchase of common stock (in shares)	(82)	(82)
Repurchase of common stock	$ (4,824)		(836)	(3,988)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(6)
Shares repurchased for tax withholdings on vesting of restricted stock units	(278)		(278)
Cash dividends declared	(1,541)			(1,541)
Share-based compensation	477		477
Other	(2)		1	(3)
Ending balance (in shares) at Jan. 29, 2022		4,151
Ending balance at Jan. 29, 2022	39,496		42,291	(2,006)	(789)
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]
Repurchase of common stock (in shares)	(12)
Ending balance (in shares) at Oct. 29, 2022		4,103
Ending balance at Oct. 29, 2022	$ 40,272		42,984	(594)	(2,118)
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	5,443			5,443
Other comprehensive income (loss)	36				36
Issuance of common stock (in shares)		30
Issuance of common stock	316		316
Repurchase of common stock (in shares)		(38)
Repurchase of common stock	(1,758)		(394)	(1,364)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(7)
Shares repurchased for tax withholdings on vesting of restricted stock units	(310)		(310)
Cash dividends declared	(3,120)			(3,120)
Share-based compensation	1,097		1,097
Other	(3)		1	(4)
Ending balance (in shares) at Jan. 28, 2023		4,095
Ending balance at Jan. 28, 2023	41,474		43,424	(364)	(1,586)
Beginning balance (in shares) at Oct. 29, 2022		4,103
Beginning balance at Oct. 29, 2022	40,272		42,984	(594)	(2,118)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,773			2,773
Other comprehensive income (loss)	532				532
Issuance of common stock (in shares)		23
Issuance of common stock	$ 316		316
Repurchase of common stock (in shares)	(26)	(26)
Repurchase of common stock	$ (1,256)		(276)	(980)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(5)
Shares repurchased for tax withholdings on vesting of restricted stock units	(202)		(202)
Cash dividends declared	(1,560)			(1,560)
Share-based compensation	601		601
Other	(2)		1	(3)
Ending balance (in shares) at Jan. 28, 2023		4,095
Ending balance at Jan. 28, 2023	$ 41,474		$ 43,424	$ (364)	$ (1,586)