Investments - Summary of Available-for-Sale Investments (Details) - USD ($) $ in Millions	Jul. 27, 2024	Jul. 29, 2023
Schedule of Investments [Line Items]
Amortized Cost	$ 10,212	$ 16,199
Gross Unrealized Gains	7	18
Gross Unrealized and Credit Losses	(354)	(625)
Fair Value	9,865	15,592
U.S. government securities
Schedule of Investments [Line Items]
Amortized Cost	2,380	3,587
Gross Unrealized Gains	1	1
Gross Unrealized and Credit Losses	(28)	(62)
Fair Value	2,353	3,526
U.S. government agency securities
Schedule of Investments [Line Items]
Amortized Cost	223	428
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	(2)	(5)
Fair Value	221	423
Non-U.S. government and agency securities
Schedule of Investments [Line Items]
Amortized Cost	370	364
Gross Unrealized Gains	1	0
Gross Unrealized and Credit Losses	0	(1)
Fair Value	371	363
Corporate debt securities
Schedule of Investments [Line Items]
Amortized Cost	3,818	7,238
Gross Unrealized Gains	5	3
Gross Unrealized and Credit Losses	(146)	(327)
Fair Value	3,677	6,914
U.S. agency mortgage-backed securities
Schedule of Investments [Line Items]
Amortized Cost	1,959	2,421
Gross Unrealized Gains	0	14
Gross Unrealized and Credit Losses	(178)	(230)
Fair Value	1,781	2,205
Commercial paper
Schedule of Investments [Line Items]
Amortized Cost	1,023	1,484
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	1,023	1,484
Certificates of deposit
Schedule of Investments [Line Items]
Amortized Cost	439	677
Gross Unrealized Gains	0	0
Gross Unrealized and Credit Losses	0	0
Fair Value	$ 439	$ 677