CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Cash flows from operating activities:
Net income	$ 1,010,238	$ 637,462	$ 103,711
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	931,309	1,057,161	1,285,752
Deferred income taxes	(90,551)	(116,679)	(160,961)
Amortization of deferred contract acquisition costs	282,103	270,701	259,368
(Gains) losses on strategic investments, net	(177,142)	(109,770)	37,571
Depreciation and amortization	122,632	104,451	82,321
Provision for accounts receivable allowances	20,022	35,244	50,285
Unrealized foreign exchange losses	17,165	12,259	13,266
Non-cash operating lease cost	24,066	21,066	28,933
Amortization of discount/premium on marketable securities	(71,636)	(50,770)	1,206
Other	4,048	(7,670)	1,647
Changes in operating assets and liabilities:
Accounts receivable	26,640	53,270	(231,845)
Prepaid expenses and other assets	(17,114)	(71,247)	(18,066)
Deferred contract acquisition costs	(246,727)	(214,657)	(298,629)
Accounts payable	(3,133)	(4,416)	11,611
Accrued expenses and other liabilities	62,277	51,974	20,530
Deferred revenue	79,995	(46,719)	127,401
Operating lease liabilities, net	(28,884)	(22,824)	(23,839)
Net cash provided by operating activities	1,945,308	1,598,836	1,290,262
Cash flows from investing activities:
Purchases of marketable securities	(4,622,104)	(4,083,968)	(2,849,121)
Maturities of marketable securities	3,610,274	3,131,419	2,835,196
Sales of marketable securities	47,482	1,191	0
Purchases of property and equipment	(136,560)	(126,953)	(103,826)
Purchases of strategic investments	(18,500)	(70,527)	(69,050)
Proceeds from strategic investments	13,384	170,067	300
Cash paid for acquisition, net of cash acquired	0	(204,918)	(120,553)
Purchases of intangible assets	0	0	(11,268)
Net cash used in investing activities	(1,106,024)	(1,183,689)	(318,322)
Cash flows from financing activities:
Cash paid for repurchases of common stock	(1,093,878)	0	(1,000,003)
Proceeds from issuance of common stock for employee stock purchase plan	54,008	54,097	53,710
Proceeds from exercise of stock options	4,619	10,195	8,577
Proceeds from employee equity transactions to be remitted (remitted) to employees and tax authorities, net	7,174	(4,106)	774
Net cash (used in) provided by financing activities	(1,028,077)	60,186	(936,942)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(15,170)	(10,196)	(8,108)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(203,963)	465,137	26,890
Cash, cash equivalents, and restricted cash—beginning of year	1,565,380	1,100,243	1,073,353
Cash, cash equivalents, and restricted cash—end of year	1,361,417	1,565,380	1,100,243
Supplemental disclosures of cash flow information
Cash paid for income taxes, net	395,401	348,129	309,084
Supplemental disclosures of non-cash investing and financing information
Purchase of equipment during the period included in accounts payable and accrued expenses	20,393	16,206	11,946
Excise tax on share repurchases included in accrued expenses	1,240	0	0
Vesting of early exercised stock options	0	0	238
Reconciliation of cash, cash equivalents, and restricted cash within the consolidated balance sheets to the amounts shown in the consolidated statements of cash flows above:
Cash and cash equivalents	1,349,380	1,558,252	1,086,830
Restricted cash, current included in prepaid expenses and other current assets	12,037	6,874	13,141
Restricted cash, noncurrent included in other assets, noncurrent	0	254	272
Total cash, cash equivalents, and restricted cash	$ 1,361,417	$ 1,565,380	$ 1,100,243