Balance Sheet Components - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024	Jan. 31, 2025
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Accumulated deprecation and amortization associated with fixed assets	$ 27.7		$ 27.7		$ 24.8
Accumulated amortization associated with capitalized internal-use software	53.3		53.3		$ 42.7
Capitalized computer software, additions	$ 5.0	$ 3.9	$ 13.8	$ 11.4