Revenue - Allowance for Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss at beginning of fiscal year	$ 109	$ 143	$ 136
Provisions (benefits)	64	21	55
Recoveries (write-offs), net	(81)	(29)	(48)
Foreign exchange and other	(9)	(26)	0
Allowance for credit loss at end of fiscal year	$ 83	$ 109	$ 143