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Cash Equivalents and Marketable Securities - Schedule of Unrealized Losses Aggregated by Investment Category (Details) - USD ($) $ in Millions | Oct. 26, 2025 | Jan. 26, 2025
--- | --- | ---
Estimated Fair Value |  |
Less than 12 Months | $ 2,197 | $ 12,422
Gross Unrealized Loss |  |
Less than 12 Months | (1) | (56)
Debt securities issued by the U.S. Treasury |  |
Estimated Fair Value |  |
Less than 12 Months | 1,223 | 6,315
Gross Unrealized Loss |  |
Less than 12 Months | 0 | (22)
Corporate debt securities |  |
Estimated Fair Value |  |
Less than 12 Months | 899 | 5,291
Gross Unrealized Loss |  |
Less than 12 Months | (1) | (29)
Debt securities issued by U.S. government agencies |  |
Estimated Fair Value |  |
Less than 12 Months | 75 | 816
Gross Unrealized Loss |  |
Less than 12 Months | $ 0 | $ (5)

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