CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		6 Months Ended
		Jan. 31, 2022	Jan. 31, 2021
Cash flows from operating activities:
Net loss		$ (534,913)	$ (552,438)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization		45,582	47,087
Stock-based compensation		178,592	173,652
Change in fair value of derivative liability		198,038	166,380
Loss on debt extinguishment		64,910	0
Amortization of debt discount and issuance costs		19,796	28,796
Operating lease cost, net of accretion		18,336	16,930
Impairment of lease-related assets		0	2,822
Non-cash interest expense		9,575	6,615
Other		5,156	4,354
Changes in operating assets and liabilities:
Accounts receivable, net		23,826	79,173
Deferred commissions		(13,332)	(67,677)
Prepaid expenses and other assets		(4,951)	(9,217)
Accounts payable		(2,391)	(2,602)
Accrued compensation and benefits		(19,496)	39,593
Accrued expenses and other liabilities		(3,371)	2,100
Operating leases, net		(23,619)	(16,523)
Deferred revenue		70,968	61,325
Net cash (used in) provided by operating activities		32,706	(19,630)
Cash flows from investing activities:
Maturities of investments		568,697	260,852
Purchases of investments		(556,148)	(859,576)
Sales of investments		17,999	2,999
Purchases of property and equipment		(17,390)	(25,168)
Net cash used in investing activities		13,158	(620,893)
Cash flows from financing activities:
Payments of debt extinguishment costs		(14,709)	0
Proceeds from unwinding of convertible note hedges		39,880	0
Payments for unwinding of warrants		(18,390)	0
Proceeds from sales of shares through employee equity incentive plans		32,053	21,904
Proceeds from the issuance of convertible notes, net of issuance costs		89,128	723,617
Repurchases of common stock		(58,570)	(125,079)
Payment of finance lease obligations		(323)	0
Net cash provided by financing activities		69,069	620,442
Net increase in cash, cash equivalents and restricted cash		114,933	(20,080)
Cash, cash equivalents and restricted cash—beginning of period		288,873	321,991
Cash, cash equivalents and restricted cash—end of period		403,806	301,911
Restricted cash	[1]	3,057	3,210
Cash and cash equivalents—end of period		400,749	298,701
Supplemental disclosures of cash flow information:
Cash paid for income taxes		12,084	8,999
Supplemental disclosures of non-cash investing and financing information:
Purchases of property and equipment included in accounts payable and accrued and other liabilities		18,939	7,621
Finance lease liabilities arising from obtaining right-of-use assets		11,148	1,960
Convertible senior notes offering costs included in accrued liabilities		$ 693	$ 0

[1] Included within other assets—non-current in the condensed consolidated balance sheets.