CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings
Beginning balance (in shares) at Jan. 31, 2022		299,037,805
Beginning balance at Jan. 31, 2022	$ 5,780,018	$ 299	$ 3,749,514	$ (17,902)	$ 2,048,107
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		1,299,758
Issuance of common stock upon exercise of stock options	8,815	$ 1	8,814
Issuance of common stock upon release of restricted stock units (in shares)		3,977,915
Issuance of common stock upon release of restricted stock units	0	$ 4	(4)
Repurchase of common stock (in shares)		(11,170,907)
Repurchase of common stock	(1,000,003)	$ (11)	(999,992)
Issuance of common stock for employee stock purchase plan (in shares)		678,279
Issuance of common stock for employee stock purchase plan	53,710	$ 1	53,709
Stock-based compensation expense	1,292,839		1,292,839
Other comprehensive loss	(32,483)			(32,483)
Net income	103,711				103,711
Ending balance (in shares) at Jan. 31, 2023		293,822,850
Ending balance at Jan. 31, 2023	6,206,607	$ 294	4,104,880	(50,385)	2,151,818
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		1,464,158
Issuance of common stock upon exercise of stock options	10,195	$ 1	10,194
Issuance of common stock upon release of restricted stock units (in shares)		11,349,453
Issuance of common stock upon release of restricted stock units	0	$ 11	(11)
Issuance of common stock for employee stock purchase plan (in shares)		921,892
Issuance of common stock for employee stock purchase plan	54,097	$ 1	54,096
Stock-based compensation expense	1,059,597		1,059,597
Other comprehensive loss	51,448			51,448
Net income	637,462				637,462
Ending balance (in shares) at Jan. 31, 2024		307,558,353
Ending balance at Jan. 31, 2024	$ 8,019,406	$ 307	5,228,756	1,063	2,789,280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	908,844	908,844
Issuance of common stock upon exercise of stock options	$ 4,619	$ 1	4,618
Issuance of common stock upon release of restricted stock units (in shares)		12,095,006
Issuance of common stock upon release of restricted stock units	0	$ 12	(12)
Repurchase of common stock (in shares)		(15,888,316)
Repurchase of common stock	(1,095,118)	$ (16)	(1,095,102)
Issuance of common stock for employee stock purchase plan (in shares)		1,066,977
Issuance of common stock for employee stock purchase plan	54,008	$ 1	54,007
Stock-based compensation expense	938,004		938,004
Other comprehensive loss	3,927			3,927
Net income	1,010,238				1,010,238
Ending balance (in shares) at Jan. 31, 2025		305,740,864
Ending balance at Jan. 31, 2025	$ 8,935,084	$ 305	$ 5,130,271	$ 4,990	$ 3,799,518