Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jan. 31, 2025
Deferred tax assets:
Net operating losses carryforwards	$ 1,967,803	$ 1,707,649
Capitalized research and development	913,392	725,823
Tax credit carryforwards	648,589	511,504
Operating lease liabilities	113,268	104,517
Deferred revenue	67,582	95,779
Capped call transactions	32,288	45,032
Stock-based compensation	40,935	36,044
Net unrealized losses on strategic investments	21,850	6,143
Other	84,115	50,790
Total deferred tax assets	3,889,822	3,283,281
Less: valuation allowance	(3,696,149)	(3,104,505)
Net deferred tax assets	193,673	178,776
Deferred tax liabilities:
Intangible assets	(19,021)	(27,481)
Deferred commissions	(103,104)	(56,662)
Operating lease right-of-use assets	(72,684)	(94,997)
Other	(3,286)	(234)
Total deferred tax liabilities	(198,095)	(179,374)
Net deferred tax liabilities	$ (4,422)	$ (598)