Investments - Summary of Available-for-Sale Investments (Details) - USD ($) $ in Millions	Jul. 26, 2025	Jul. 27, 2024
Schedule of Investments [Line Items]
Amortized Cost	$ 7,473	$ 10,212
Gross Unrealized Gains	15	7
Gross Unrealized and Credit Losses	(107)	(354)
Fair Value	7,381	9,865
U.S. government securities
Schedule of Investments [Line Items]
Amortized Cost	1,971	2,380
Gross Unrealized Gains	2	1
Gross Unrealized and Credit Losses	(12)	(28)
Fair Value	1,961	2,353
U.S. government agency securities
Schedule of Investments [Line Items]
Amortized Cost	67	223
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	(2)
Fair Value	67	221
Non-U.S. government and agency securities
Schedule of Investments [Line Items]
Amortized Cost	458	370
Gross Unrealized Gains	0	1
Gross Unrealized and Credit Losses	0	0
Fair Value	458	371
Corporate debt securities
Schedule of Investments [Line Items]
Amortized Cost	3,138	3,818
Gross Unrealized Gains	13	5
Gross Unrealized and Credit Losses	(61)	(146)
Fair Value	3,090	3,677
U.S. agency mortgage-backed securities
Schedule of Investments [Line Items]
Amortized Cost	320	1,959
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	(34)	(178)
Fair Value	286	1,781
Commercial paper
Schedule of Investments [Line Items]
Amortized Cost	950	1,023
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	950	1,023
Certificates of deposit
Schedule of Investments [Line Items]
Amortized Cost	569	439
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	$ 569	$ 439