Investments - Summary of Contractual Maturities of Marketable Securities (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Jan. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Less than one year	$ 3,268,071	$ 2,883,598
Due in one to five years	2,712,504	2,520,635
Total	$ 5,980,575	$ 5,404,233

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details