Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2025	Jan. 31, 2024
Deferred tax assets:
Net operating losses carryforwards	$ 1,707,649	$ 1,673,213
Capitalized research and development	725,823	420,491
Tax credit carryforwards	511,504	376,804
Operating lease liabilities	104,517	54,008
Deferred revenue	95,779	82,683
Capped call transactions	45,032	0
Stock-based compensation	36,044	109,446
Net unrealized losses on strategic investments	6,143	2,443
Other	50,790	31,776
Total deferred tax assets	3,283,281	2,750,864
Less: valuation allowance	(3,104,505)	(2,621,009)
Net deferred tax assets	178,776	129,855
Deferred tax liabilities:
Intangible assets	(27,481)	(39,173)
Deferred commissions	(56,662)	(41,609)
Operating lease right-of-use assets	(94,997)	(48,629)
Other	(234)	(1,326)
Total deferred tax liabilities	(179,374)	(130,737)
Net deferred tax liabilities	$ (598)	$ (882)