Fair Value of Financial Assets and Non-marketable Equity Securities - Schedule of Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Millions	Apr. 27, 2025	Jan. 26, 2025
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	$ 52,136	$ 42,106
Liabilities
Notes	7,300	7,200
Money market funds
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	6,522	3,760
Publicly-held equity securities
Cash equivalents and marketable securities:
Publicly-held equity securities	1,251	381
Debt securities issued by the U.S. Treasury
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	23,251	16,769
Corporate debt securities
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	20,051	18,526
Debt securities issued by U.S. government agencies
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	2,145	2,777
Certificates of deposit
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	126	97
Foreign government bonds
Cash equivalents and marketable securities:
Cash equivalents and marketable securities		177
Level 1
Cash equivalents and marketable securities:
Publicly-held equity securities		381
Level 1 | Money market funds
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	6,522	3,760
Level 1 | Publicly-held equity securities
Cash equivalents and marketable securities:
Publicly-held equity securities	1,251	381
Level 2 | Debt securities issued by the U.S. Treasury
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	23,251	16,769
Level 2 | Corporate debt securities
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	20,051	18,526
Level 2 | Debt securities issued by U.S. government agencies
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	2,145	2,777
Level 2 | Certificates of deposit
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	126	97
Level 2 | Foreign government bonds
Cash equivalents and marketable securities:
Cash equivalents and marketable securities	$ 41	$ 177