Investments - Summary of Available-for-Sale Debt Investments (Details) - USD ($) $ in Millions	Jan. 24, 2026	Jul. 26, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 7,997	$ 7,473
Gross Unrealized Gains	15	15
Gross Unrealized and Credit Losses	(52)	(107)
Fair Value	7,960	7,381
U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,756	1,971
Gross Unrealized Gains	4	2
Gross Unrealized and Credit Losses	(4)	(12)
Fair Value	1,756	1,961
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	49	67
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	49	67
Non-U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	442	458
Gross Unrealized Gains	1	0
Gross Unrealized and Credit Losses	0	0
Fair Value	443	458
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,106	3,138
Gross Unrealized Gains	10	13
Gross Unrealized and Credit Losses	(37)	(61)
Fair Value	3,079	3,090
Mortgage- and asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	247	320
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	(11)	(34)
Fair Value	236	286
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,337	950
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	1,337	950
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,060	569
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	$ 1,060	$ 569