CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Cash flows from operating activities
Net loss	$ (514,034)	$ (854,952)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	47,952	50,625
Amortization of deferred commissions	53,574	77,983
Amortization of investment premiums (accretion of discounts), net	(482)	432
Amortization of debt discount and issuance costs	5,484	57,784
Loss on lease termination	0	52,524
Non-cash operating lease costs	(2,805)	571
Stock-based compensation	413,141	387,197
Deferred income taxes	(1,020)	(294)
Other	97	33
Changes in operating assets and liabilities, net of acquisition
Accounts receivable, net	553,106	384,798
Prepaid expenses and other assets	17,078	(14,842)
Deferred commissions	(62,754)	(77,073)
Accounts payable	23,629	19,698
Accrued compensation	(138,298)	20,170
Accrued expenses and other liabilities	(17,142)	17,817
Deferred revenue	(252,807)	(107,731)
Net cash provided by operating activities	124,719	14,740
Cash flows from investing activities
Purchases of property and equipment	(6,650)	(4,363)
Capitalized software development costs	(4,990)	(5,148)
Purchases of marketable securities	(923,762)	(289,573)
Maturities of marketable securities	209,424	87,766
Purchases of strategic investments	(6,099)	0
Acquisition, net of cash acquired	0	(80,333)
Other investment activities	1,436	(1,168)
Net cash used in investing activities	(730,641)	(292,819)
Cash flows from financing activities
Proceeds from the exercise of stock options	1,132	1,174
Proceeds from employee stock purchase plan	48,596	48,246
Proceeds from the issuance of convertible senior notes, net of issuance costs	0	982,749
Repurchases of common stock	0	(192,208)
Taxes paid related to net share settlement of equity awards	(124,614)	(101,781)
Net cash (used in) provided by financing activities	(74,886)	738,180
Net (decrease) increase in cash and cash equivalents	(680,808)	460,101
Cash and cash equivalents at beginning of period	1,428,691	1,771,064
Cash and cash equivalents at end of period	747,883	2,231,165
Supplemental disclosures
Cash paid for income taxes	6,751	4,488
Cash paid for interest	17,659	7,116
Non-cash investing and financing activities
Increase in accrued purchases of property and equipment	2,994	3,247
Equity consideration for acquisition	0	939
Vesting of early exercised options	1	63
Costs related to issuance of convertible senior notes included in accrued expenses and other liabilities	0	1,034
Unsettled repurchases of common stock included in accrued expenses and other liabilities	$ 0	$ 37,307