CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Cash flows from operating activities:
Net loss	$ (848,411)	$ (266,332)	$ (208,913)
Adjustments to reconcile net loss to net cash provided by operating activities:
Stock-based compensation	565,480	196,181	126,624
Depreciation, amortization and accretion	107,612	36,865	17,815
Amortization of debt discount and issuance costs	86,461	68,424	25,892
Amortization of deferred commissions	57,177	39,661	28,588
Deferred income taxes	(6,157)	(1,182)	(2,253)
Non-cash charitable contributions	7,238	9,292	1,746
Loss on early extinguishment and conversion of debt	179	2,263	14,572
(Gain) loss on strategic investments	(7,609)	628	(130)
Other, net	1,051	4,909	119
Changes in operating assets and liabilities:
Accounts receivable	(174,817)	(66,373)	(37,515)
Deferred commissions	(170,577)	(81,016)	(61,224)
Prepaid expenses and other assets	(6,758)	(13,174)	(4,080)
Operating lease right-of-use assets	22,856	19,053	12,951
Accounts payable	6,764	4,081	1,689
Accrued compensation	50,309	44,157	23,034
Accrued expenses and other liabilities	21,391	5,527	9,972
Operating lease liabilities	(24,455)	(17,150)	(9,716)
Deferred revenue	416,385	142,148	116,432
Net cash provided by operating activities	104,119	127,962	55,603
Cash flows from investing activities:
Capitalization of internal-use software costs	(4,336)	(4,159)	(3,888)
Purchases of property and equipment	(12,310)	(13,083)	(15,442)
Purchases of securities available for sale and other	(1,846,709)	(2,029,030)	(999,387)
Proceeds from maturities and redemption of securities available for sale	1,482,033	535,123	356,277
Proceeds from sales of securities available for sale and other	229,798	206,129	27,271
Payments for business acquisitions, net of cash acquired	(215,175)	0	(44,283)
Purchase of intangible assets	(113)	(126)	(8,589)
Net cash used in investing activities	(366,812)	(1,305,146)	(688,041)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes, net of issuance costs	0	1,134,841	1,040,660
Payments for repurchases and conversions of convertible senior notes	(26)	(446)	(224,414)
Proceeds from hedges related to convertible senior notes	2	195,046	405,851
Payments for warrants related to convertible senior notes	0	(175,399)	(358,622)
Purchases of capped calls related to convertible senior notes	0	(133,975)	(74,094)
Proceeds from stock option exercises, net of repurchases	53,522	45,620	45,363
Proceeds from shares issued in connection with employee stock purchase plan	35,568	25,911	18,767
Other, net	0	0	(126)
Net cash provided by financing activities	89,066	1,091,598	853,385
Effects of changes in foreign currency exchange rates on cash, cash equivalents and restricted cash	(2,347)	2,263	(209)
Net (decrease) increase in cash, cash equivalents and restricted cash	(175,974)	(83,323)	220,738
Cash, cash equivalents and restricted cash at beginning of year	448,630	531,953	311,215
Cash, cash equivalents and restricted cash at end of year	272,656	448,630	531,953
Cash paid during the period for:
Interest	5,704	3,759	862
Income taxes	3,116	978	1,123
Non-cash investing and financing activities:
Issuance of common stock and value of equity awards assumed in connection with business combination	5,409,344	0	0
Issuance of common stock for repurchases and conversions of convertible senior notes	126,144	307,910	380,406
Benefit from exercise of hedges related to convertible senior notes	92,097	37,076	0
Common stock issued as charitable contribution	7,238	9,292	1,746
Operating lease right-of-use assets exchanged for lease liabilities	21,518	45,611	16,832
Issuance of common stock for bonus settlement	0	9,818	2,809
Reconciliation of cash, cash equivalents, and restricted cash within the consolidated balance sheets to the amounts shown in the statements of cash flows above:
Cash and cash equivalents	260,134	434,607	520,048
Restricted cash, current included in prepaid expenses and other current assets	5,012	4,553	467
Restricted cash, noncurrent included in other assets	7,510	9,470	11,438
Total cash, cash equivalents and restricted cash	$ 272,656	$ 448,630	$ 531,953