Cash Equivalents and Investments - Schedule of Contractual Maturities of Short-term Investments (Details) - USD ($) $ in Millions	Apr. 30, 2023	Jan. 31, 2023
Amortized Cost
Amortized Cost	$ 2,269	$ 2,473
Estimated Fair Value
Estimated fair value	2,257	2,449
Short-term investments (Available-for-sale)
Amortized Cost
Amortized cost, due within one year	1,960
Amortized cost, due between one to five years	297
Amortized Cost	2,257	2,340
Estimated Fair Value
Estimated fair value, due within one year	1,949
Estimated fair value, due between one to five years	296
Estimated fair value	$ 2,245	$ 2,316

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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