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Cash Equivalents and Investments - Schedule of Contractual Maturities of Short-term Investments (Details) - USD ($) $ in Millions | Jul. 31, 2023 | Jan. 31, 2023
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 1,983 | $ 2,473
Estimated Fair Value |  |
Estimated fair value | 1,973 | 2,449
Short-term investments (Available-for-sale) |  |
Amortized Cost |  |
Amortized cost, due within one year | 1,564 |
Amortized cost, due between one to five years | 196 |
Amortized Cost | 1,760 | 2,340
Estimated Fair Value |  |
Estimated fair value, due within one year | 1,556 |
Estimated fair value, due between one to five years | 194 |
Estimated fair value | $ 1,750 | $ 2,316

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