Income Taxes - Change in Valuation Allowance for Deferred Tax Assets (Details) - Deferred tax asset valuation allowance - USD ($) $ in Millions	12 Months Ended
	Jul. 27, 2024	Jul. 29, 2023	Jul. 30, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of fiscal year	$ 754	$ 834	$ 771
Additions	148	35	84
Additions from Splunk	147	0	0
Deductions	(4)	(18)	(10)
Write-offs	(20)	(93)	(12)
Foreign exchange and other	(1)	(4)	1
Balance at end of fiscal year	$ 1,024	$ 754	$ 834