CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Cash flows from operating activities:
Net income (loss)	$ (727,882,000)	$ (635,586,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	103,641,000	85,332,000
Non-cash operating lease costs	33,998,000	27,568,000
Amortization of deferred commissions	58,954,000	45,586,000
Stock-based compensation, net of amounts capitalized	783,677,000	687,936,000
Net accretion of discounts on investments	(13,369,000)	(24,772,000)
Net realized and unrealized losses on strategic investments in equity securities	35,265,000	27,203,000
Amortization of debt issuance costs	4,145,000	0
Asset impairment related to office facility exit	108,619,000	0
Deferred income tax	(3,445,000)	49,000
Other	(3,489,000)	1,918,000
Changes in operating assets and liabilities, net of effects of business combinations:
Accounts receivable	276,051,000	492,192,000
Deferred commissions	(84,864,000)	(36,754,000)
Prepaid expenses and other assets	(22,338,000)	33,347,000
Accounts payable	7,348,000	91,425,000
Accrued expenses and other liabilities	97,226,000	4,637,000
Operating lease liabilities	(26,397,000)	(25,289,000)
Deferred revenue	(323,871,000)	(349,459,000)
Net cash provided by operating activities	303,269,000	425,333,000
Cash flows from investing activities:
Purchases of property and equipment	(61,654,000)	(21,562,000)
Capitalized software development costs	0	(13,396,000)
Cash paid for business combinations, net of cash acquired	(164,230,000)	(8,906,000)
Purchases of intangible assets	(1,311,000)	0
Purchases of investments	(1,649,044,000)	(1,274,742,000)
Sales of investments	18,875,000	40,797,000
Maturities and redemptions of investments	1,502,129,000	1,511,458,000
Settlement of cash flow hedges	0	(749,000)
Net cash provided by (used in) investing activities	(355,235,000)	232,900,000
Cash flows from financing activities:
Proceeds from exercise of stock options	34,446,000	23,664,000
Proceeds from issuance of common stock under employee stock purchase plan	53,193,000	46,735,000
Taxes paid related to net share settlement of equity awards	(294,497,000)	(278,114,000)
Repurchases of common stock	(490,638,000)	(916,329,000)
Payments of deferred purchase consideration for business combinations	(600,000)	0
Net cash used in financing activities	(698,096,000)	(1,124,044,000)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	12,222,000	(1,909,000)
Net decrease in cash, cash equivalents, and restricted cash	(737,840,000)	(467,720,000)
Cash, cash equivalents, and restricted cash—beginning of period	2,698,678,000	1,780,977,000
Cash, cash equivalents, and restricted cash—end of period	1,960,838,000	1,313,257,000
Supplemental disclosures of non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued expenses	35,392,000	20,168,000
Stock-based compensation included in capitalized software development costs	0	17,141,000
Unpaid taxes related to net share settlement of equity awards included in accrued expenses and other current liabilities	10,247,000	4,719,000
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	1,880,720,000	1,282,045,000
Restricted cash—included in other assets and prepaid expenses and other current assets	80,118,000	31,212,000
Total cash, cash equivalents, and restricted cash	$ 1,960,838,000	$ 1,313,257,000