Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Shares of Common Stock	Common Stock and Additional Paid-In Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Jul. 25, 2020			4,237
Beginning balance at Jul. 25, 2020	$ 37,920	$ (38)		$ 41,202	$ (2,763)	$ (38)	$ (519)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,582				7,582
Other comprehensive income (loss)	231						231
Issuance of common stock (in shares)			37
Issuance of common stock	307			307
Repurchase of common stock (in shares)			(49)
Repurchase of common stock	(2,111)			(478)	(1,633)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(10)
Shares repurchased for tax withholdings on vesting of restricted stock units	(419)			(419)
Cash dividends declared	(4,604)				(4,604)
Share-based compensation	1,337			1,337
Ending balance (in shares) at May. 01, 2021			4,215
Ending balance at May. 01, 2021	40,205			41,949	(1,456)		(288)
Beginning balance (in shares) at Jan. 23, 2021			4,221
Beginning balance at Jan. 23, 2021	39,121			41,690	(2,351)		(218)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,863				2,863
Other comprehensive income (loss)	(70)						(70)
Issuance of common stock (in shares)			6
Issuance of common stock	$ 1			1
Repurchase of common stock (in shares)	(10)		(10)
Repurchase of common stock	$ (510)			(103)	(407)
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	(102)			(102)
Cash dividends declared	(1,561)				(1,561)
Share-based compensation	463			463
Ending balance (in shares) at May. 01, 2021			4,215
Ending balance at May. 01, 2021	$ 40,205			41,949	(1,456)		(288)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock (in shares)	(15)
Ending balance (in shares) at Jul. 31, 2021			4,217
Ending 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 (in shares)			(10)
Shares repurchased for tax withholdings on vesting of restricted stock units	(546)			(546)
Cash dividends declared	(4,657)				(4,657)
Share-based compensation	1,407			1,407
Other	(4)		$ (2)	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 (in shares)			(2)
Shares repurchased for tax withholdings on vesting of restricted stock units	(135)			(135)
Cash dividends declared	(1,555)				(1,555)
Share-based compensation	477			477
Other	(1)		$ (2)	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)