Stock-Based Compensation - Restricted Stock (Details) - Restricted stock and restricted stock units - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Number of Performance-Based Restricted Stock Units
Balance as of the beginning of the period (in shares)	10,315,199
Granted (in shares)	6,269,951
Vested and converted to shares (in shares)	(6,903,945)
Forfeited or canceled (in shares)	(2,073,344)
Balance as of the end of period (in shares)	7,607,861	10,315,199
Weighted-Average Grant Date Fair Value
Balance as of the beginning of the period (in dollars per share)	$ 6.37
Granted (in dollars per share)	7.72	$ 5.85	$ 8.28
Vested and converted to shares (in dollars per share)	6.21
Forfeited or canceled (in shares)	6.85
Balance as of the end of period (in dollars per share)	$ 7.51	$ 6.37
Weighted average fair value vested (in dollars)	$ 42.9	$ 40.6	$ 40.7