Fair Value Measurements - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Upward adjustments	$ 0	$ 4,125	$ 32,975
Impairments	(3,101)	(38,036)	0
Net unrealized gains (losses) on marketable equity securities	15,197	(12,524)	(5,354)
Net unrealized gains (losses) on strategic investments in equity securities	12,096	(46,435)	27,621
Realized gains on non-marketable equity securities under measurement alternative	34,713	0	0
Total—included in other income (expense), net	46,809	$ (46,435)	$ 27,621
Samooha, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity interest in acquiree, remeasurement gain	$ 34,000