CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Cash flows from operating activities:
Net income	$ 637,462	$ 103,711	$ 1,375,639
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	1,057,161	1,285,752	477,287
Deferred income taxes	(116,679)	(160,961)	(327,957)
Amortization of deferred contract acquisition costs	270,701	259,368	177,283
(Gains) losses on strategic investments, net	(109,770)		(43,761)
(Gains) losses on strategic investments, net		37,571
Depreciation and amortization	104,451	82,321	48,188
Provision for accounts receivable allowances	35,244	50,285	36,747
Unrealized foreign exchange losses (gains)	12,259	13,266	0
Non-cash operating lease cost	21,066	28,933	18,387
Amortization of discount/premium on marketable securities	(50,770)	1,206	25,316
Other	(7,670)	1,647	4,591
Changes in operating assets and liabilities:
Accounts receivable	53,270	(231,845)	(159,183)
Prepaid expenses and other assets	(71,247)	(18,066)	(155,934)
Deferred contract acquisition costs	(214,657)	(298,629)	(247,371)
Accounts payable	(4,416)	11,611	(2,218)
Accrued expenses and other liabilities	51,974	20,530	101,369
Deferred revenue	(46,719)	127,401	293,887
Operating lease liabilities, net	(22,824)	(23,839)	(17,004)
Net cash provided by operating activities	1,598,836	1,290,262	1,605,266
Cash flows from investing activities:
Purchases of marketable securities	(4,083,968)	(2,849,121)	(4,434,749)
Maturities of marketable securities	3,131,419	2,835,196	1,733,043
Sales of marketable securities	1,191	0	296,867
Purchases of property and equipment	(126,953)	(103,826)	(132,590)
Purchases of strategic investments	(70,527)	(69,050)	(305,149)
Proceeds from strategic investments	170,067	300	0
Cash paid for acquisition, net of cash acquired	(204,918)	(120,553)	(3,501)
Purchases of intangible assets	0	(11,268)	(13,018)
Net cash used in investing activities	(1,183,689)	(318,322)	(2,859,097)
Cash flows from financing activities:
Cash paid for repurchases of common stock	0	(1,000,003)	0
Proceeds from issuance of common stock for employee stock purchase plan	54,097	53,710	59,331
Proceeds from exercise of stock options	10,195	8,577	14,404
Proceeds from employee equity transactions (remitted) to be remitted to employees and tax authorities, net	(4,106)	774	(40,004)
Other	0	0	337
Net cash provided by (used in) financing activities	60,186	(936,942)	34,068
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(10,196)	(8,108)	0
Net increase (decrease) in cash, cash equivalents, and restricted cash	465,137	26,890	(1,219,763)
Cash, cash equivalents, and restricted cash—beginning of year	1,100,243	1,073,353	2,293,116
Cash, cash equivalents, and restricted cash—end of year	1,565,380	1,100,243	1,073,353
Supplemental disclosures of cash flow information
Cash paid for income taxes, net	348,129	309,084	38,979
Supplemental disclosures of non-cash investing and financing information
Purchase of equipment during the period included in accounts payable and accrued expenses	16,206	11,946	13,728
Vesting of early exercised stock options	0	238	407
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	1,558,252	1,086,830	1,062,820
Restricted cash, current included in prepaid expenses and other current assets	6,874	13,141	10,236
Restricted cash, noncurrent included in other assets, noncurrent	254	272	297
Total cash, cash equivalents, and restricted cash	$ 1,565,380	$ 1,100,243	$ 1,073,353