Income Taxes - Schedule of Components of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Income Tax Disclosure [Abstract]
U.S.	$ (1,377,141)	$ (1,341,798)	$ (875,703)
Foreign	65,231	56,699	26,480
Loss before income taxes	$ (1,311,910)	$ (1,285,099)	$ (849,223)