Palo Alto Networks (PANW) 10-Q 22 May 20 2020 Q3 Quarterly report Financial data

Cover Page Cover Page

Cover Page Cover Page - shares	9 Months Ended
	Apr. 30, 2020	May 14, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 30, 2020
Document Transition Report	false
Entity File Number	001-35594
Entity Registrant Name	PALO ALTO NETWORKS, INC
Entity Central Index Key	0001327567
Document Fiscal Year End Date	--07-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-2530195
Entity Address, Address Line One	3000 Tannery Way
Entity Address, City or Town	Santa Clara
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95054
City Area Code	408
Local Phone Number	753-4000
Title of 12(b) Security	Common stock, $0.0001 par value per share
Trading Symbol	PANW
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Small Business	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		96,465,888

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) shares in Millions, $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,484.7	$ 961.4
Short-term investments	554.1	1,841.7
Accounts receivable, net of allowance for doubtful accounts of $1.8 and $0.8 at April 30, 2020 and July 31, 2019, respectively	668.8	582.4
Prepaid expenses and other current assets	306.4	279.3
Total current assets	3,014	3,664.8
Property and equipment, net	357.2	296
Operating lease right-of-use assets	263.8	0
Long-term investments	151.2	575.4
Goodwill	1,812.9	1,352.3
Intangible assets, net	380.6	280.6
Other assets	522.1	423.1
Total assets	6,501.8	6,592.2
Current liabilities:
Accounts payable	52.3	73.3
Accrued compensation	174.9	235.5
Accrued and other liabilities	253.9	162.4
Deferred revenue	1,854.6	1,582.1
Total current liabilities	2,335.7	2,053.3
Convertible senior notes, net	1,477	1,430
Long-term deferred revenue	1,516	1,306.6
Long-term operating lease liabilities	344.6	0
Other long-term liabilities	83.8	216
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock; $0.0001 par value; 100.0 shares authorized; none issued and outstanding at April 30, 2020 and July 31, 2019	0	0
Common stock and additional paid-in capital; $0.0001 par value; 1,000.0 shares authorized; 96.5 and 96.8 shares issued and outstanding at April 30, 2020 and July 31, 2019, respectively	1,855.7	2,490.9
Accumulated other comprehensive loss	(2)	(3.7)
Accumulated deficit	(1,109)	(900.9)
Total stockholders’ equity	744.7	1,586.3
Total liabilities and stockholders’ equity	$ 6,501.8	$ 6,592.2
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Allowance for doubtful accounts	$ 1.8	$ 0.8
Common stock, shares issued (in shares)	96.5	96.8
Common stock, shares outstanding (in shares)	96.5	96.8
Preferred stock, shares authorized (in shares)	100	100
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenue:
Revenue	$ 869.4	$ 726.6	$ 2,458	$ 2,093.8
Cost of revenue:
Cost of revenue	258.3	204.9	709.1	591
Total gross profit	611.1	521.7	1,748.9	1,502.8
Operating expenses:
Research and development	196.3	139.1	552.2	380.8
Sales and marketing	388.4	339	1,129	973.6
General and administrative	82.9	62.3	228.9	192.6
Total operating expenses	667.6	540.4	1,910.1	1,547
Operating loss	(56.5)	(18.7)	(161.2)	(44.2)
Interest expense	(19.4)	(20.6)	(57.3)	(63.9)
Other income, net	8.1	18.2	35.1	47.2
Loss before income taxes	(67.8)	(21.1)	(183.4)	(60.9)
Provision for (benefit from) income taxes	7	(0.9)	24.7	0.2
Net loss	$ (74.8)	$ (20.2)	$ (208.1)	$ (61.1)
Net loss per share, basic and diluted	$ (0.77)	$ (0.21)	$ (2.14)	$ (0.65)
Weighted-average shares used to compute net loss per share, basic and diluted	96.7	94.4	97.2	94.1
Product
Revenue:
Revenue	$ 280.9	$ 278.4	$ 758.6	$ 790.5
Cost of revenue:
Cost of revenue	73.3	78	207.1	233.7
Subscription and support
Revenue:
Revenue	588.5	448.2	1,699.4	1,303.3
Cost of revenue:
Cost of revenue	$ 185	$ 126.9	$ 502	$ 357.3

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (74.8)	$ (20.2)	$ (208.1)	$ (61.1)
Other comprehensive income (loss), net of tax:
Change in unrealized gains (losses) on investments	0.4	2.4	2	8.1
Change in unrealized gains (losses) on cash flow hedges	(0.6)	0.2	(0.3)	1.1
Other comprehensive income (loss)	(0.2)	2.6	1.7	9.2
Comprehensive loss	$ (75)	$ (17.6)	$ (206.4)	$ (51.9)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) shares in Millions, $ in Millions	Total	Common stock	Common stock and additional paid in capital	Accumulated other comprehensive income (loss)	Accumulated Deficit
Common stock, beginning balance (in shares) at Jul. 31, 2018		93.6
Beginning balance at Jul. 31, 2018	$ 1,160.3		$ 1,967.4	$ (16.4)	$ (790.7)
Increase (Decrease) in Stockholders' Equity
Net loss	(61.1)
Other comprehensive income (loss)	9.2			9.2
Issuance of common stock in connection with employee equity incentive plans (in shares)		3
Issuance of common stock in connection with employee equity incentive plans	70.5		70.5
Taxes paid related to net share settlement of equity awards	(24.6)		(24.6)
Share-based compensation for equity-based awards	423		423
Repurchase and retirement of common stock (in shares)		(1.9)
Repurchase and retirement of common stock	$ (330)		(330)
Settlement of convertible notes (in shares)	1.7
Settlement of convertible notes	$ 12.2		12.2
Common stock received from exercise of note hedges (in shares)	(1.7)
Stock Issued During Period, Shares, Acquisitions		1.2
Stock Issued During Period, Value, Acquisitions	$ 225.9		225.9
Temporary equity reclassification	20.8		20.8
Common stock, ending balance (in shares) at Apr. 30, 2019		95.9
Ending balance at Apr. 30, 2019	1,453.5		2,340.8	(7.2)	(880.1)
Common stock, beginning balance (in shares) at Jan. 31, 2019		93.7
Beginning balance at Jan. 31, 2019	1,071.8		1,941.5	(9.8)	(859.9)
Increase (Decrease) in Stockholders' Equity
Net loss	(20.2)
Other comprehensive income (loss)	2.6			2.6
Issuance of common stock in connection with employee equity incentive plans (in shares)		1
Issuance of common stock in connection with employee equity incentive plans	36.6		36.6
Taxes paid related to net share settlement of equity awards	(3.6)		(3.6)
Share-based compensation for equity-based awards	140.4		140.4
Stock Issued During Period, Shares, Acquisitions		1.2
Stock Issued During Period, Value, Acquisitions	224.2		224.2
Temporary equity reclassification	1.7		1.7
Common stock, ending balance (in shares) at Apr. 30, 2019		95.9
Ending balance at Apr. 30, 2019	$ 1,453.5		2,340.8	(7.2)	(880.1)
Common stock, beginning balance (in shares) at Jul. 31, 2019	96.8	96.8
Beginning balance at Jul. 31, 2019	$ 1,586.3		2,490.9	(3.7)	(900.9)
Increase (Decrease) in Stockholders' Equity
Net loss	(208.1)
Other comprehensive income (loss)	1.7			1.7
Issuance of common stock in connection with employee equity incentive plans (in shares)		2.8
Issuance of common stock in connection with employee equity incentive plans	83.5		83.5
Taxes paid related to net share settlement of equity awards	(16.8)		(16.8)
Share-based compensation for equity-based awards	496.2		496.2
Repurchase and retirement of common stock (in shares)		5.1
Repurchase and retirement of common stock	$ 1,198.1		1,198.1
Repurchase and retirement of common stock (in shares)	(0.9)
Repurchase and retirement of common stock	$ (198.1)
Settlement of warrants (in shares)		2
Common stock, ending balance (in shares) at Apr. 30, 2020	96.5	96.5
Ending balance at Apr. 30, 2020	$ 744.7		1,855.7	(2)	(1,109)
Common stock, beginning balance (in shares) at Jan. 31, 2020		99.7
Beginning balance at Jan. 31, 2020	1,608.5		2,644.5	(1.8)	(1,034.2)
Increase (Decrease) in Stockholders' Equity
Net loss	(74.8)
Other comprehensive income (loss)	(0.2)			(0.2)
Issuance of common stock in connection with employee equity incentive plans (in shares)		1
Issuance of common stock in connection with employee equity incentive plans	46.4		46.4
Taxes paid related to net share settlement of equity awards	(4.8)		(4.8)
Share-based compensation for equity-based awards	169.6		169.6
Repurchase and retirement of common stock (in shares)		(4.2)
Repurchase and retirement of common stock	$ (1,000)		(1,000)
Common stock, ending balance (in shares) at Apr. 30, 2020	96.5	96.5
Ending balance at Apr. 30, 2020	$ 744.7		$ 1,855.7	$ (2)	$ (1,109)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities
Net loss	$ (208.1)	$ (61.1)
Adjustments to reconcile net loss to net cash provided by operating activities:
Share-based compensation for equity-based awards	484.2	417.5
Depreciation and amortization	145.6	111.6
(Gain) loss related to facility exit	(3.1)	4.1
Amortization of deferred contract costs	171.4	147.6
Amortization of debt discount and debt issuance costs	47	53.6
Amortization of operating lease right-of-use assets	34.2	0
Amortization of investment premiums, net of accretion of purchase discounts	(6.2)	(13)
Loss on conversions of convertible senior notes	0	2.6
Repayments of convertible senior notes attributable to debt discount	0	(67.1)
Changes in opeating assets and liabilities, net of effects of acquisition:
Accounts receivable, net	(67.2)	63.8
Prepaid expenses and other assets	(208)	(164.4)
Accounts payable	(22.8)	23.2
Accrued compensation	(71.6)	(22.7)
Accrued and other liabilities	(47.1)	(10.7)
Deferred revenue	453.7	339.1
Net cash provided by operating activities	702	824.1
Cash flows from investing activities
Purchases of investments	(295.5)	(2,426.6)
Proceeds from sales of investments	310.8	3.5
Proceeds from maturities of investments	1,706.4	1,506.8
Business acquisitions, net of cash acquired	(583.5)	(382.8)
Purchases of property, equipment, and other assets	(182.6)	(78.1)
Net cash provided by (used in) investing activities	955.6	(1,377.2)
Cash flows from financing activities
Repayments of convertible senior notes attributable to principal and equity component	0	(348.5)
Payments for debt issuance costs	0	(3.7)
Repurchases of common stock	(1,198.1)	(330)
Proceeds from sales of shares through employee equity incentive plans	83.7	70.3
Payments for taxes related to net settlement of equity awards	(16.8)	(24.6)
Payments for deferred consideration related to business acquisitions	(1.3)	(1.3)
Net cash used in financing activities	(1,132.5)	(637.8)
Net increase (decrease) in cash, cash equivalents, and restricted cash	525.1	(1,190.9)
Cash, cash equivalents, and restricted cash - beginning of period	965	2,509.2
Cash, cash equivalents, and restricted cash - end of period	$ 1,490.1	$ 1,318.3

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets - USD ($) $ in Millions	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Reconciliation of cash, cash equivalents, and restricted cash
Cash and cash equivalents	$ 1,484.7	$ 1,314.9
Total cash, cash equivalents, and restricted cash	1,490.1	1,318.3
Equity consideration for business acquisitions	(11)	(225.9)
Prepaid expenses and other current assets
Reconciliation of cash, cash equivalents, and restricted cash
Restricted cash	2.7	2.2
Other assets
Reconciliation of cash, cash equivalents, and restricted cash
Restricted cash	$ 2.7	$ 1.2

Description of Business, Basis

Description of Business, Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies (Notes)	9 Months Ended
	Apr. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business, Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies	Description of Business and Summary of Significant Accounting Policies Description of Business Palo Alto Networks, Inc. (the “Company,” “we,” “us,” or “our”), located in Santa Clara, California, was incorporated in March 2005 under the laws of the State of Delaware and commenced operations in April 2005. We offer platforms that empower enterprises, service providers, and government entities to secure their organizations by safely enabling applications and data running in their networks, on their endpoints, and in the cloud, and by preventing breaches that stem from targeted cyberattacks. Basis of Presentation and Principles of Consolidation The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”), consistent in all material respects with those applied in our Annual Report on Form 10-K for the fiscal year ended July 31, 2019, filed with the Securities and Exchange Commission (“SEC”) on September 9, 2019. Our condensed consolidated financial statements include our accounts and our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Our condensed consolidated financial statements are unaudited, but include all adjustments of a normal recurring nature necessary for a fair presentation of our quarterly results. We have made estimates and judgments affecting the amounts reported in our condensed consolidated financial statements and the accompanying notes. The actual results that we experience may differ materially from our estimates. Certain prior period amounts have been reclassified to conform to our current period presentation. Our condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes in our Annual Report on Form 10-K for the fiscal year ended July 31, 2019. Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We base our estimates on historical experience and also on assumptions that we believe are reasonable. Actual results could differ materially from those estimates due to risks and uncertainties, including uncertainty in the current economic environment due to the recent outbreak of COVID-19. Summary of Significant Accounting Policies There have been no material changes to our significant accounting policies as of and for the nine months ended April 30, 2020, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended July 31, 2019, except for the change in our accounting policies for leases due to our adoption of new lease accounting guidance. Refer to “Recently Adopted Accounting Pronouncements” below and Note 10. Leases and Other Office Facilities. Recently Adopted Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued new authoritative guidance on lease accounting. Among its provisions, the standard requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for operating leases and also requires additional qualitative and quantitative disclosures about lease arrangements. We adopted this standard effective August 1, 2019 on a modified retrospective basis, under which financial results reported in periods prior to fiscal 2020 were not adjusted. We elected the package of practical expedients, which allowed us to carry forward our historical assessments of whether contracts are or contain leases, lease classification, and initial direct costs. Additionally, we elected to account for lease and non-lease components as a single lease component and to not recognize right-of-use assets and lease liabilities for leases with a term of 12 months or less. The most significant impact of adopting this guidance was the recognition of $286.4 million of operating lease right-of-use assets and $442.4 million of operating lease liabilities on our condensed consolidated balance sheet as of August 1, 2019, which included reclassifying previously recognized $129.0 million in lease incentives, deferred or prepaid rent, as well as $27.0 million in cease-use liabilities to operating lease right-of-use assets. The adoption of this standard had no impact on our condensed consolidated statements of operations and condensed consolidated statements of cash flows. Refer to Note 10. Leases and Other Office Facilities for further discussion. Recently Issued Accounting Pronouncements Financial Instruments - Credit Losses In June 2016, the FASB issued new authoritative guidance on the accounting for credit losses on most financial assets and certain financial instruments. The standard replaces the existing incurred loss model with an expected credit loss model for financial assets measured at amortized cost, including trade receivables, and requires that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down. The standard is effective for us in our first quarter of fiscal 2021 and will be applied on a modified retrospective basis. We are currently evaluating whether this standard will have a material impact on our condensed consolidated financial statements.

Revenue (Notes)

Revenue (Notes)	9 Months Ended
	Apr. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregation of Revenue The following table presents revenue by geographic theater (in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 Revenue: Americas United States $ 553.5 $ 464.3 $ 1,554.0 $ 1,314.8 Other Americas 40.7 33.5 114.5 108.2 Total Americas 594.2 497.8 1,668.5 1,423.0 Europe, the Middle East, and Africa (“EMEA”) 171.5 138.7 485.3 414.7 Asia Pacific and Japan (“APAC”) 103.7 90.1 304.2 256.1 Total revenue $ 869.4 $ 726.6 $ 2,458.0 $ 2,093.8 The following table presents revenue for groups of similar products and services (in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 Revenue: Product $ 280.9 $ 278.4 $ 758.6 $ 790.5 Subscription and support Subscription 354.3 258.8 1,015.5 739.8 Support 234.2 189.4 683.9 563.5 Total subscription and support 588.5 448.2 1,699.4 1,303.3 Total revenue $ 869.4 $ 726.6 $ 2,458.0 $ 2,093.8 Deferred Revenue During the nine months ended April 30, 2020, we recognized approximately $1,265.0 million of revenue pertaining to amounts that were deferred as of July 31, 2019. Remaining Performance Obligations Revenue expected to be recognized from remaining performance obligations was $3.5 billion as of April 30, 2020, of which we expect to recognize approximately $1.9 billion over the next 12 months and the remainder thereafter. The following table presents details of our short-term and long-term deferred contract costs as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Short-term deferred contract costs $ 173.7 $ 151.1 Long-term deferred contract costs 343.6 324.2 Total deferred contract costs $ 517.3 $ 475.3 We recognized amortization expense for our deferred contract costs of $60.5 million and $171.4 million during the three and nine months ended April 30, 2020, respectively, and $57.2 million and $147.6 million during the three and nine months ended April 30, 2019, respectively. We did not recognize any impairment losses on our deferred contract costs during the three and nine months ended April 30, 2020 or 2019.

Fair Value Measurements (Notes)

Fair Value Measurements (Notes)	9 Months Ended
	Apr. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We categorize assets and liabilities recorded or disclosed at fair value on our condensed consolidated balance sheets based upon the level of judgment associated with inputs used to measure their fair value. The categories are as follows: • Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments. • Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation. The following table presents the fair value of our financial assets and liabilities measured at fair value on a recurring basis using the above input categories as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 762.6 $ — $ — $ 762.6 $ 369.1 $ — $ — $ 369.1 Certificates of deposit — — — — — 12.0 12.0 Commercial paper — — — — — 19.3 — 19.3 U.S. government and agency securities — — — — — 54.4 — 54.4 Total cash equivalents 762.6 — — 762.6 369.1 85.7 — 454.8 Short-term investments: Certificates of deposit — 22.3 — 22.3 — 17.5 — 17.5 Commercial paper — — — — — 8.9 — 8.9 Corporate debt securities — 95.1 — 95.1 — 375.5 — 375.5 U.S. government and agency securities — 436.7 — 436.7 — 1,439.8 — 1,439.8 Total short-term investments — 554.1 — 554.1 — 1,841.7 — 1,841.7 Long-term investments: Corporate debt securities — 46.0 — 46.0 — 214.3 — 214.3 U.S. government and agency securities — 105.2 — 105.2 — 361.1 — 361.1 Total long-term investments — 151.2 — 151.2 — 575.4 — 575.4 Prepaid expenses and other current assets: Foreign currency forward contracts — 0.3 — 0.3 — 1.3 — 1.3 Total prepaid expenses and other current assets — 0.3 — 0.3 — 1.3 — 1.3 Total assets measured at fair value $ 762.6 $ 705.6 $ — $ 1,468.2 $ 369.1 $ 2,504.1 $ — $ 2,873.2 Accrued and other liabilities: Foreign currency forward contracts $ — $ 3.3 $ — $ 3.3 $ — $ 3.8 $ — $ 3.8 Total accrued and other liabilities — 3.3 — 3.3 — 3.8 — 3.8 Total liabilities measured at fair value $ — $ 3.3 $ — $ 3.3 $ — $ 3.8 $ — $ 3.8 Refer to Note 9. Debt for the carrying amount and estimated fair value of our convertible senior notes as of April 30, 2020 and July 31, 2019.

Cash Equivalents and Investment

Cash Equivalents and Investments (Notes)	9 Months Ended
	Apr. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Cash Equivalents and Investments	Cash Equivalents and Investments Available-for-sale Debt Securities The following tables summarize the amortized cost, unrealized gains and losses, and fair value of our available-for-sale debt securities as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Investments: Certificates of deposit $ 22.3 $ — $ — $ 22.3 Corporate debt securities 139.4 1.7 — 141.1 U.S. government and agency securities 537.6 4.3 — 541.9 Total available-for-sale investments $ 699.3 $ 6.0 $ — $ 705.3 July 31, 2019 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash equivalents: Certificates of deposit $ 12.0 $ — $ — $ 12.0 Commercial paper 19.3 — — 19.3 U.S. government and agency securities 54.4 — — 54.4 Total available-for-sale cash equivalents $ 85.7 $ — $ — $ 85.7 Investments: Certificates of deposit $ 17.5 $ — $ — $ 17.5 Commercial paper 8.9 — — 8.9 Corporate debt securities 587.8 2.3 (0.3) 589.8 U.S. government and agency securities 1,799.5 2.6 (1.2) 1,800.9 Total available-for-sale investments $ 2,413.7 $ 4.9 $ (1.5) $ 2,417.1 Unrealized losses related to these securities are due to interest rate fluctuations as opposed to credit quality. In addition, we do not intend to sell and it is not likely that we would be required to sell these securities before recovery of their amortized cost basis, which may be at maturity. As a result, there were no other-than-temporary impairments for these securities at April 30, 2020 and July 31, 2019. The following table summarizes the amortized cost and fair value of our available-for-sale debt securities as of April 30, 2020, by contractual years-to-maturity (in millions): Amortized Cost Fair Value Due within one year $ 551.0 $ 554.1 Due between one and three years 148.3 151.2 Total $ 699.3 $ 705.3 Marketable Equity Securities Marketable equity securities consist of money market funds and are included in cash and cash equivalents in our condensed consolidated balance sheets. As of April 30, 2020 and July 31, 2019, the carrying value of our marketable equity securities were $762.6 million and $369.1 million, respectively. There were no unrealized gains or losses recognized for these securities during the three and nine months ended April 30, 2020 and 2019.

Derivative Instruments (Notes)

Derivative Instruments (Notes)	9 Months Ended
	Apr. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative InstrumentsAs a global business, we are exposed to currency exchange rate risk. Substantially all of our revenue is transacted in U.S. dollars, however, a portion of our operating expenditures are incurred outside of the United States and are denominated in foreign currencies, making them subject to fluctuations in foreign currency exchange rates. We enter into foreign currency derivative contracts with maturities of 15 months or less, which we designate as cash flow hedges, to manage the foreign currency exchange rate risk associated with these expenditures. These derivative contracts expose us to credit risk to the extent that the counterparties may be unable to meet the terms of the arrangement. We mitigate this credit risk by transacting with major financial institutions with high credit ratings and also enter into master netting arrangements, which permit net settlement of transactions with the same counterparty. We are not required to pledge, and are not entitled to receive, cash collateral related to these derivative instruments. We do not enter into derivative contracts for trading or speculative purposes. Our derivative financial instruments are recorded at fair value, on a gross basis, as either assets or liabilities in our condensed consolidated balance sheets. Gains or losses related to our cash flow hedges are recorded as a component of accumulated other comprehensive income (loss) (“AOCI”) in our condensed consolidated balance sheets and are reclassified into the financial statement line item associated with the underlying hedged transaction in our condensed consolidated statements of operations when the underlying hedged transaction is recognized in earnings. If it becomes probable that the hedged transaction will not occur, the cumulative unrealized gain or loss is reclassified immediately from AOCI into the financial statement line item associated with the underlying hedged transaction in our condensed consolidated statements of operations. Gains or losses related to non-designated derivative instruments are recognized in other income (expense), net in our condensed consolidated statements of operations for each period until the instrument matures, is terminated, is re-designated as a qualified cash flow hedge, or is sold. Derivatives designated as cash flow hedges are classified in our condensed consolidated statements of cash flows in the same manner as the underlying hedged transaction, primarily within cash flows from operating activities. As of April 30, 2020 and July 31, 2019, the total notional amount of our outstanding foreign currency forward contracts was $106.0 million and $307.2 million, respectively. Refer to Note 3. Fair Value Measurements for the fair value of our derivative instruments as reported on our condensed consolidated balance sheets as of April 30, 2020. During the three and nine months ended April 30, 2020 and 2019, both unrealized gains and losses recognized in AOCI related to our cash flow hedges and amounts reclassified into earnings were not material. Unrealized losses in AOCI related to our cash flow hedges as of April 30, 2020 and 2019 were not material.

Acquisitions (Notes)

Acquisitions (Notes)	9 Months Ended
	Apr. 30, 2020
Business Combinations [Abstract]
Acquisitions	Acquisitions CloudGenix Inc. On April 21, 2020, we completed our acquisition of 100% of the voting interest of CloudGenix Inc. (“CloudGenix”), a privately-held company . We believe the acquisition will strengthen our secure access service edge (“SASE”) platform. The tota l purchase consideration for the acquisition of CloudGenix was $402.7 million, which consisted of the following (in millions): Amount Cash $ 396.1 Fair value of replacement awards 6.6 Total $ 402.7 As part of the acquisition, we issued $30.3 million of replacement awards, of which the portion attributable to services performed prior to the acquisition date was allocated to purchase consideration. The remaining fair value was allocated to future services and will be expensed over the remaining service periods as share-based compensation. We have accounted for this transaction as a business combination and allocated the purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values, as presented in the following table (in millions): Amount Goodwill $ 301.2 Identified intangible assets 109.9 Cash 8.3 Net liabilities assumed (16.7) Total $ 402.7 Goodwill generated from this business combination is primarily attributable to the assembled workforce and expected post-acquisition synergies from integrating CloudGenix technology into our platforms. The goodwill is not deductible for income tax purposes. The following table presents details of the identified intangible assets acquired (in millions, except years): Fair Value Estimated Useful Life Developed technology $ 67.2 5 years Customer relationships 42.7 10 years Total $ 109.9 Aporeto, Inc. On December 23, 2019, we completed our acquisition of 100% of the voting interest of Aporeto, Inc. (“Aporeto”), a privately-held machine identity-based microsegmentation company. We believe the acquisition will strengthen our cloud-native security platform capabilities delivered by Prisma Cloud. The total purchase consideration for the acquisition of Aporeto was $144.1 million, which consisted of the following (in millions): Amount Cash $ 139.8 Fair value of replacement awards 4.3 Total $ 144.1 As part of the acquisition, we issued $16.4 million of replacement awards, of which the portion attributable to services performed prior to the acquisition date was allocated to purchase consideration. The remaining fair value was allocated to future services and will be expensed over the remaining service periods as share-based compensation. We have accounted for this transaction as a business combination and allocated the purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values, as presented in the following table (in millions): Amount Goodwill $ 111.3 Identified intangible assets 23.8 Cash 10.5 Net liabilities assumed (1.5) Total $ 144.1 Goodwill generated from this business combination is primarily attributable to the assembled workforce and expected post-acquisition synergies from integrating Aporeto’s technology into our platforms. The goodwill is not deductible for income tax purposes. The following table presents details of the identified intangible assets acquired (in millions, except years): Fair Value Estimated Useful Life Developed technology $ 20.5 7 years Customer relationships 3.3 4 years Total $ 23.8 Zingbox, Inc. On September 20, 2019, we completed our acquisition of 100% of the voting equity interest of Zingbox, Inc. (“Zingbox”), a privately-held Internet of Things (“IoT”) security company. We believe the acquisition will accelerate our delivery of IoT security through our Next-Generation Firewall and Cortex platforms. The total purchase consideration for the acquisition of Zingbox was $66.4 million in cash. As part of the acquisition, we issued replacement equity awards with a total fair value of $5.7 million, which will be expensed over the remaining service periods as share-based compensation. We have accounted for this transaction as a business combination and allocated the purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values, as presented in the following table (in millions): Amount Goodwill $ 48.1 Identified intangible assets 20.4 Net liabilities assumed (2.1) Total $ 66.4 Goodwill generated from this business combination is primarily attributable to the assembled workforce and expected post-acquisition synergies from integrating Zingbox’s technology into our platforms. The goodwill is not deductible for income tax purposes. The following table presents details of the identified intangible assets acquired (in millions, except years): Fair Value Estimated Useful Life Developed technology $ 18.6 5 years Customer relationships 1.8 8 years Total $ 20.4 Additional Acquisition-Related Information The operating results of the acquired companies are included in our condensed consolidated statements of operations from the dates of acquisition. Pro forma results of operations have not been presented because the effects of the acquisitions were not material to our condensed consolidated statements of operations. Additional information related to the acquired companies, such as that related to income tax and other contingencies, existing as of the respective acquisition dates but unknown to us may become known during the remainder of the measurement period, not to exceed 12 months from the acquisition date, which may result in changes to the amounts and allocations recorded.

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Notes)	9 Months Ended
	Apr. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill The following table presents details of our goodwill during the nine months ended April 30, 2020 (in millions): Amount Balance as of July 31, 2019 $ 1,352.3 Goodwill acquired 460.6 Balance as of April 30, 2020 $ 1,812.9 Purchased Intangible Assets The following table presents details of our purchased intangible assets as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Developed technology $ 425.9 $ (126.5) $ 299.4 $ 318.8 $ (78.7) $ 240.1 Customer relationships 87.6 (9.7) 77.9 39.8 (4.7) 35.1 Acquired intellectual property 8.9 (5.6) 3.3 8.9 (5.1) 3.8 Trade name and trademarks 9.4 (9.4) — 9.4 (9.4) — Other 2.2 (2.2) — 2.2 (2.2) — Total intangible assets subject to amortization 534.0 (153.4) 380.6 379.1 (100.1) 279.0 Intangible assets not subject to amortization: In-process research and development — — — 1.6 — 1.6 Total purchased intangible assets $ 534.0 $ (153.4) $ 380.6 $ 380.7 $ (100.1) $ 280.6 We recognized amortization expense of $19.3 million and $54.1 million for the three and nine months ended April 30, 2020, respectively, and $14.7 million and $38.5 million for the three and nine months ended April 30, 2019, respectively. The following table summarizes estimated future amortization expense of our intangible assets as of April 30, 2020 (in millions): Amount Fiscal years ending July 31: Remaining 2020 $ 22.9 2021 89.7 2022 85.3 2023 59.1 2024 51.1 2025 and thereafter 72.5 Total future amortization expense $ 380.6

Deferred Contract Costs (Notes)

Deferred Contract Costs (Notes)	9 Months Ended
	Apr. 30, 2020
Revenue from Contract with Customer [Abstract]
Deferred Contract Costs	Revenue Disaggregation of Revenue The following table presents revenue by geographic theater (in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 Revenue: Americas United States $ 553.5 $ 464.3 $ 1,554.0 $ 1,314.8 Other Americas 40.7 33.5 114.5 108.2 Total Americas 594.2 497.8 1,668.5 1,423.0 Europe, the Middle East, and Africa (“EMEA”) 171.5 138.7 485.3 414.7 Asia Pacific and Japan (“APAC”) 103.7 90.1 304.2 256.1 Total revenue $ 869.4 $ 726.6 $ 2,458.0 $ 2,093.8 The following table presents revenue for groups of similar products and services (in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 Revenue: Product $ 280.9 $ 278.4 $ 758.6 $ 790.5 Subscription and support Subscription 354.3 258.8 1,015.5 739.8 Support 234.2 189.4 683.9 563.5 Total subscription and support 588.5 448.2 1,699.4 1,303.3 Total revenue $ 869.4 $ 726.6 $ 2,458.0 $ 2,093.8 Deferred Revenue During the nine months ended April 30, 2020, we recognized approximately $1,265.0 million of revenue pertaining to amounts that were deferred as of July 31, 2019. Remaining Performance Obligations Revenue expected to be recognized from remaining performance obligations was $3.5 billion as of April 30, 2020, of which we expect to recognize approximately $1.9 billion over the next 12 months and the remainder thereafter. The following table presents details of our short-term and long-term deferred contract costs as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Short-term deferred contract costs $ 173.7 $ 151.1 Long-term deferred contract costs 343.6 324.2 Total deferred contract costs $ 517.3 $ 475.3 We recognized amortization expense for our deferred contract costs of $60.5 million and $171.4 million during the three and nine months ended April 30, 2020, respectively, and $57.2 million and $147.6 million during the three and nine months ended April 30, 2019, respectively. We did not recognize any impairment losses on our deferred contract costs during the three and nine months ended April 30, 2020 or 2019.

Debt (Notes)

Debt (Notes)	9 Months Ended
	Apr. 30, 2020
Debt Disclosure [Abstract]
Debt	Debt Convertible Senior Notes In June 2014, we issued $575.0 million aggregate principal amount of 0.0% Convertible Senior Notes due 2019 (the “2019 Notes”), and in July 2018, we issued $1.7 billion aggregate principal amount of 0.75% Convertible Senior Notes due 2023 (the “2023 Notes” and, together with the 2019 Notes, the “Notes”). The 2023 Notes bear interest at a fixed rate of 0.75% per year, payable semi-annually in arrears on January 1 and July 1 of each year, beginning on January 1, 2019. The 2023 Notes are governed by an indenture between us, as the issuer, and U.S. Bank National Association, as Trustee (the “Indenture”). The 2023 Notes are unsecured, unsubordinated obligations and the Indenture governing the 2023 Notes does not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness, or the issuance or repurchase of securities by us or any of our subsidiaries. The 2019 Notes were converted prior to or settled on the maturity date of July 1, 2019, in accordance with their terms. The 2023 Notes mature on July 1, 2023. We cannot redeem the 2023 Notes prior to maturity. The 2023 Notes are convertible for up to 6.4 million shares of our common stock at an initial conversion rate of approximately 3.7545 shares of common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $266.35 per share of common stock, subject to adjustments. Holders of the 2023 Notes may surrender their 2023 Notes for conversion at their option at any time prior to the close of business on the business day immediately preceding April 1, 2023, only under the following circumstances: • during any fiscal quarter commencing after the fiscal quarter ending on October 31, 2018 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the applicable conversion price for the 2023 Notes on each applicable trading day (the “sale price condition”); • during the five business day period after any five consecutive trading day period (the “measurement period”), in which the trading price per $1,000 principal amount of the 2023 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the applicable conversion rate for the 2023 Notes on each such trading day; or • upon the occurrence of specified corporate events. On or after April 1, 2023, holders may surrender all or any portion of their 2023 Notes for conversion at any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date regardless of the foregoing conditions, and such conversions will be settled upon the maturity date. Upon conversion, holders of the 2023 Notes will receive cash equal to the aggregate principal amount of the 2023 Notes to be converted, and, at our election, cash and/or shares of our common stock for any amounts in excess of the aggregate principal amount of the 2023 Notes being converted. The conversion price will be subject to adjustment in some events. Holders who convert their 2023 Notes in connection with certain corporate events that constitute a “make-whole fundamental change” under the Indenture are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, upon the occurrence of a corporate event that constitutes a “fundamental change” under the Indenture, holders of the 2023 Notes may require us to repurchase for cash all or a portion of the 2023 Notes at a repurchase price equal to 100% of the principal amount of the 2023 Notes plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The sale price condition was not met for the 2023 Notes during the fiscal quarters ended April 30, 2020 or July 31, 2019. Since the 2023 Notes were not convertible, the net carrying amount of the 2023 Notes was classified as a long-term liability and the equity component was included in additional paid-in capital in our condensed consolidated balance sheets as of April 30, 2020 and July 31, 2019. As of April 30, 2020, all of the 2023 Notes remained outstanding. The following table sets forth the components of the 2023 Notes as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Liability component: Principal $ 1,693.0 $ 1,693.0 Less: debt discount and debt issuance costs, net of amortization 216.0 263.0 Net carrying amount $ 1,477.0 $ 1,430.0 Equity component $ 315.0 $ 315.0 The total estimated fair value of the 2023 Notes was $1.7 billion and $1.9 billion at April 30, 2020 and July 31, 2019, respectively. The fair value was determined based on the closing trading price per $100 of the 2023 Notes as of the last day of trading for the period. We consider the fair value of the 2023 Notes at April 30, 2020 and July 31, 2019 to be a Level 2 measurement. The fair value of the 2023 Notes is primarily affected by the trading price of our common stock and market interest rates. Based on the closing price of our common stock on April 30, 2020, the if-converted value of the 2023 Notes was less than its principal amount. The following table sets forth interest expense recognized related to the Notes (dollars in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 2019 Notes 2023 Notes Total 2019 Notes 2023 Notes Total 2019 Notes 2023 Notes Total 2019 Notes 2023 Notes Total Contractual interest expense $ — $ 3.2 $ 3.2 $ — $ 3.3 $ 3.3 $ — $ 9.5 $ 9.5 $ — $ 9.6 $ 9.6 Amortization of debt discount — 15.3 15.3 1.6 14.7 16.3 — 45.5 45.5 7.6 43.6 51.2 Amortization of debt issuance costs — 0.5 0.5 0.3 0.5 0.8 — 1.5 1.5 1.0 1.4 2.4 Total interest expense recognized $ — $ 19.0 $ 19.0 $ 1.9 $ 18.5 $ 20.4 $ — $ 56.5 $ 56.5 $ 8.6 $ 54.6 $ 63.2 Effective interest rate of the liability component — % 5.2 % 4.8 % 5.2 % — % 5.2 % 4.8 % 5.2 % Note Hedges To minimize the impact of potential economic dilution upon conversion of the Notes, we entered into separate convertible note hedge transactions (the “2019 Note Hedges,” with respect to the 2019 Notes, and the “2023 Note Hedges,” with respect to the 2023 Notes, and collectively, the “Note Hedges”) with respect to our common stock concurrent with the issuance of each series of Notes. Upon the settlement of the 2019 Notes, we exercised the corresponding portion of our 2019 Note Hedges during the year ended July 31, 2019 and received shares of our common stock that fully offset the shares issued in excess of the principal amount of the converted 2019 Notes. The 2019 Note Hedges expired upon maturity of the 2019 Notes. The 2023 Note Hedges cover up to 6.4 million shares of our common stock at a strike price per share that corresponds to the initial applicable conversion price of the 2023 Notes, which are also subject to adjustment, and are exercisable upon conversion of the 2023 Notes. The 2023 Note Hedges will expire upon maturity of the 2023 Notes. The 2023 Note Hedges are separate transactions and are not part of the terms of 2023 Notes. Holders of the 2023 Notes will not have any rights with respect to the 2023 Note Hedges. Any shares of our common stock receivable by us under the 2023 Note Hedges are excluded from the calculation of diluted earnings per share as they are antidilutive. We paid an aggregate amount of $332.0 million for the 2023 Note Hedges, which is included in additional paid-in capital in our consolidated balance sheets. Warrants Separately, but concurrently with the issuance of each series of Notes, we entered into transactions whereby we sold warrants (the “2019 Warrants,” with respect to the 2019 Notes, and the “2023 Warrants,” with respect to the 2023 Notes, and collectively, the “Warrants”) to acquire shares of our common stock, subject to anti-dilution adjustments. The 2019 Warrants became exercisable beginning October 2019 and the 2023 Warrants are exercisable beginning October 2023. The following table presents details of the Warrants (in millions, except per share data): Initial Number Strike Price Aggregate 2019 Warrants 5.2 $ 137.85 $ 78.3 2023 Warrants 6.4 $ 417.80 $ 145.4 The shares issuable under the Warrants will be included in the calculation of diluted earnings per share when the average market value per share of our common stock for the reporting period exceeds the applicable strike price for such series of Warrants. The Warrants are separate transactions and are not part of either series of Notes or Note Hedges and are not remeasured through earnings each reporting period. Holders of the Notes of either series will not have any rights with respect to the Warrants. The aggregate proceeds received from the sale of the Warrants are included in additional paid-in capital in our consolidated balance sheets. During the nine months ended April 30, 2020, we net settled all 2019 Warrants with 2.0 million shares or $462.0 million in fair value of our common stock. The number of net shares issued was determined based on the number of 2019 Warrants exercised multiplied by the difference between the strike price of the 2019 Warrants and their daily volume weighted-average stock price. Revolving Credit Facility On September 4, 2018, we entered into a credit agreement (the “Credit Agreement”) with certain institutional lenders that provides for a $400.0 million unsecured revolving credit facility (the “Credit Facility”), with an option to increase the amount of the Credit Facility by up to an additional $350.0 million, subject to certain conditions. The Credit Facility matures on the earlier of (i) September 4, 2023 and (ii) the date that is 91 days prior to the stated maturity of our 2023 Notes if (a) any of the 2023 Notes are still outstanding and (b) our unrestricted cash and cash equivalents are less than the then outstanding principal amount of our 2023 Notes plus $400.0 million. The borrowings under the Credit Facility bear interest, at our option, at a base rate plus a spread of 0.00% to 0.75%, or an adjusted LIBO rate plus a spread of 1.00% to 1.75%, in each case with such spread being determined based on our leverage ratio. We are obligated to pay an ongoing commitment fee on undrawn amounts at a rate of 0.125% to 0.250%, depending on our leverage ratio. As of April 30, 2020, there were no amounts outstanding and we were in compliance with all covenants under the Credit Agreement.

Leases (Notes)

Leases (Notes)	9 Months Ended
	Apr. 30, 2020
Leases [Abstract]
Leases	Leases and Other Office Facilities We determine if an arrangement is a lease at inception. We evaluate classification of leases at commencement and, as necessary, at modification. Operating leases are included in operating lease right-of-use assets, accrued and other liabilities, and long-term operating lease liabilities on our condensed consolidated balance sheets beginning August 1, 2019. We did not have any material finance leases in any of the periods presented. Operating lease right-of-use assets represent our right to use an underlying asset for the lease term. Operating lease liabilities represent our obligation to make payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at the present value of the future lease payments at the lease commencement date. The interest rate used to determine the present value of the future lease payments is our incremental borrowing rate, because the interest rates implicit in most of our leases are not readily determinable. Our incremental borrowing rate is estimated to approximate the interest rate on a collateralized basis with similar terms and payments, and in economic environments where the leased asset is located. Operating lease right-of-use assets also include adjustments related to lease incentives, prepaid or accrued rent and initial direct lease costs. Operating lease right-of-use assets are subject to evaluation for impairment or disposal on a basis consistent with other long-lived assets. Our lease terms may include periods under options to extend or terminate the lease when it is reasonably certain that we will exercise that option. We generally use the base, non-cancelable lease term when determining the lease assets and liabilities. Operating lease cost is generally recognized on a straight-line basis over the lease term. We account for lease and non-lease components as a single lease component and do not recognize right-of-use assets and lease liabilities for leases with a term of 12 months or less. Payments under our lease arrangements are primarily fixed, however, certain lease agreements contain variable payments, which are expensed as incurred and not included in the operating lease right-of-use assets and liabilities. Variable lease payments are primarily comprised of payments affected by the Consumer Price Index, common area maintenance, and utility charges. We have entered into various non-cancelable operating leases primarily for our facilities with original lease periods expiring through the year ending July 31, 2028. In December 2019, we entered into lease termination agreements for our previous corporate headquarters in Santa Clara, California, which we ceased use of in August 2017. Under the arrangements, we terminated these leases effective in December 2019, prior to their expiration date of July 2023. The early termination fee is $25.0 million, payable in equal quarterly installments from April 2020 through July 2023. Upon termination, we recorded a decrease of $13.6 million in operating lease liabilities based on the payment schedule of the early termination fee discounted by the incremental borrowing rate for the remaining payment term. We also decreased right-of-use asset by $8.7 million upon surrendering possession of the properties. As a result, during the nine months ended April 30, 2020, we recorded a gain of $3.1 million net of other related fees of $1.8 million in general and administrative expense in our condensed consolidated statements of operations. During the three months ended April 30, 2020, our net cost for operating leases was $19.6 million and primarily consisted of operating lease costs of $17.1 million, in addition to variable lease costs, short-term lease costs, and sublease income. During the nine months ended April 30, 2020, our net cost for operating leases was $53.1 million and primarily consisted of operating lease costs of $46.3 million, in addition to variable lease costs, short-term lease costs and sublease income. The following tables present additional information for our operating leases (in millions, except for years and percentages): Nine Months Ended April 30, 2020 Operating cash flows used in payments of operating lease liabilities $ 50.3 Right-of-use assets obtained in exchange for new operating lease liabilities $ 21.0 April 30, 2020 Weighted-average remaining lease term 7.2 years Weighted-average discount rate 3.9 % The following table presents maturities of operating lease liabilities as of April 30, 2020 (in millions): Amount Fiscal years ending July 31: Remaining 2020 $ 15.0 2021 73.9 2022 67.0 2023 61.2 2024 50.5 2025 and thereafter 195.9 Total operating lease payments 463.5 Less: imputed interest 61.6 Present value of operating lease liabilities $ 401.9 Current portion of operating lease liabilities (1) $ 57.3 Long-term operating lease liabilities $ 344.6 ______________ (1) Current portion of operating lease liabilities is included in accrued and other liabilities on our condensed consolidated balance sheet. Operating lease liabilities above do not include sublease income. As of April 30, 2020, we expect to receive sublease income of approximately $5.1 million, which consists of $1.3 million to be received for the remainder of fiscal 2020 and $3.8 million to be received in fiscal 2021. During the three months ended April 30, 2020, we purchased 5.8 acres of land in Santa Clara, California for $51.7 million to accommodate future expansion of our hea dquarters. This amount was recorded in property and equipment, net o n our condensed consolidated balance sheets as of April 30, 2020.

Commitments and Contingencies (

Commitments and Contingencies (Notes)	9 Months Ended
	Apr. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Commitments Manufacturing Purchase Commitments Our electronics manufacturing service provider (“EMS provider”) procures components and assembles our products based on our forecasts. These forecasts are based on estimates of demand for our products primarily for the next 12 months, which are in turn based on historical trends and an analysis from our sales and product management organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate supply, we may issue non-cancelable orders for products and components to our manufacturing partners or component suppliers. As of April 30, 2020, our purchase commitments under such orders were $124.3 million excluding obligations under contracts that we can cancel without a significant penalty. Other Purchase Commitments We have entered into various non-cancelable agreements with third-party providers for our use of certain cloud and other services, under which we are committed to minimum or fixed purchases through the year ending July 31, 2026. The following table presents details of the aggregate future non-cancelable purchase commitments under these agreements as of April 30, 2020 (in millions): Amount Fiscal years ending July 31: Remaining 2020 $ 1.7 2021 11.7 2022 49.8 2023 58.5 2024 67.5 2025 and thereafter 97.5 Total other purchase commitments $ 286.7 Mutual Covenant Not to Sue and Release Agreement In January 2020, we executed a Mutual Covenant Not to Sue and Release Agreement for $50.0 million, to extend an existing covenant not to sue for seven years. As the primary benefit of the arrangement was attributable to future use, the amount was recorded in other assets on our condensed consolidated balance sheets and is amortized to cost of product revenue in our condensed consolidated statements of operations over the estimated period of benefit of seven years. This amount was paid in the three months ended April 30, 2020. Litigation We are subject to legal proceedings, claims, and litigation arising in the ordinary course of business, including intellectual property litigation. Such matters are subject to many uncertainties and outcomes are not predictable with assurance. We accrue for contingencies when we believe that a loss is probable and that we can reasonably estimate the amount of any such loss. To the extent there is a reasonable possibility that a loss exceeding amounts already recognized may be incurred and the amount of such additional loss would be material, we will either disclose the estimated additional loss or state that such an estimate cannot be made. As of April 30, 2020, we have not recorded any significant accruals for loss contingencies associated with such legal proceedings, determined that an unfavorable outcome is probable or reasonably possible, or determined that the amount or range of any possible loss is reasonably estimable.

Stockholders' Equity (Notes)

Stockholders' Equity (Notes)	9 Months Ended
	Apr. 30, 2020
Equity [Abstract]
Stockholders’ Equity	Stockholders’ Equity Share Repurchase Program In February 2019, our board of directors authorized a $1.0 billion share repurchase program which is funded from available working capital. Repurchases may be made at management’s discretion from time to time on the open market, through privately negotiated transactions, transactions structured through investment banking institutions, block purchase techniques, 10b5-1 trading plans, or a combination of the foregoing. This repurchase authorization will expire on December 31, 2020 and may be suspended or discontinued at any time. During the nine months ended April 30, 2020, we repurchased and retired 0.9 million shares of our common stock under the authorization for an aggregate purchase price of $198.1 million, including transaction costs. The total price of the shares repurchased and related transaction costs are reflected as a reduction to common stock and additional paid-in capital on our condensed consolidated balance sheets. As of April 30, 2020, $801.9 million remained available for future share repurchases under our current repurchase authorization. Accelerated Stock Repurchase In February 2020, our board of directors approved the repurchase of $1.0 billion of our common stock through an accelerated share repurchase (“ASR”) transaction with a financial institution. This ASR transaction is in addition to our share repurchase program. D uring the three months ended April 30, 2020, we made an up-front payment of $1.0 billion pursuant to the ASR to receive an initial delivery of approximately 80% of the common stock, or 4.2 million shares valued at $800.0 million. The final number of shares to be repurchased under the ASR will be based generally upon the volume weighted average price of our common stock during the repurchase period, which is expected to be completed in our fourth quarter of fiscal 2020. The shares received by us were retired and the upfront payment was accounted for as a reduction to stockholders' e quity of $1.0 billion in our condens ed consolidated statements of stockholders’ equity for the three and nine months ended April 30, 2020.

Equity Award Plans (Notes)

Equity Award Plans (Notes)	9 Months Ended
	Apr. 30, 2020
Share-based Payment Arrangement [Abstract]
Equity Award Plans	Equity Award Plans Assumed Share-based Compensation Plans CloudGenix Inc. Stock Incentive Plan In connection with our acquisition of CloudGenix in April 2020, we assumed CloudGenix’s 2013 Equity Incentive Plan (the “CloudGenix Plan”), under which the assumed CloudGenix equity awards were granted. The assumed equity awards will be settled in shares of our common stock and will retain the terms and conditions under which they were originally granted; forfeited awards will not be returned to the CloudGenix Plan. No additional equity awards will be granted under the CloudGenix Plan. Refer to Note 6. Acquisitions for more information on the CloudGenix acquisition and the related equity awards assumed. Aporeto Inc. Stock Incentive Plan In connection with our acquisition of Aporeto in December 2019, we assumed Aporeto’s 2015 Stock Option and Grant Plan, as amended and restated (the “Aporeto Plan”), under which the assumed Aporeto equity awards were granted. The assumed equity awards will be settled in shares of our common stock and will retain the terms and conditions under which they were originally granted; forfeited awards will not be returned to the Aporeto Plan. No additional equity awards will be granted under the Aporeto Plan. Refer to Note 6. Acquisitions for more information on the Aporeto acquisition and the related equity awards assumed. Zingbox, Inc. Stock Incentive Plan In connection with our acquisition of Zingbox in September 2019, we assumed Zingbox’s Stock Incentive Plan, as amended and restated (the “Zingbox Plan”), under which the assumed Zingbox equity awards were granted. The assumed equity awards will be settled in shares of our common stock and will retain the terms and conditions under which they were originally granted; forfeited awards will not be returned to the Zingbox Plan. No additional equity awards will be granted under the Zingbox Plan. Refer to Note 6. Acquisitions for more information on the Zingbox acquisition and the related equity awards assumed. Stock Option Activities The following table summarizes the stock option and performance stock option (“PSO”) activity under our stock plans during the reporting period (in millions, except per share amounts): Stock Options Outstanding PSOs Outstanding Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Balance—July 31, 2019 0.3 $ 14.53 2.2 $ 81.4 3.7 $ 193.99 6.2 $ 120.1 Exercised (0.1) $ 11.66 — $ — Forfeited — $ — (0.8) $ 193.51 Balance—April 30, 2020 0.2 $ 17.57 1.7 $ 33.3 2.9 $ 194.11 5.5 $ 9.4 Exercisable—April 30, 2020 0.2 $ 17.57 1.7 $ 33.3 2.9 $ 194.11 5.5 $ 9.4 Restricted Stock Award (“RSA”), Performance-Based Stock Award (“PSA”), Restricted Stock Unit (“RSU”), and Performance-Based Stock Unit (“PSU”) Activities The following table summarizes the RSA and PSA activity under our stock plans during the reporting period (in millions, except per share amounts): RSAs Outstanding PSAs Outstanding Number of Shares Weighted-Average Grant-Date Fair Value Per Share Number of Shares Weighted-Average Grant-Date Fair Value Per Share Balance—July 31, 2019 0.0 $ 148.54 0.1 $ 148.54 Vested 0.0 $ 148.54 0.0 $ 148.54 Balance—April 30, 2020 0.0 $ 148.54 0.1 $ 148.54 The following table summarizes the RSU and PSU activity under our stock plans during the reporting period (in millions, except per share amounts): RSUs Outstanding PSUs Outstanding Number of Shares Weighted-Average Grant-Date Fair Value Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Number of Shares Weighted-Average Grant-Date Fair Value Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Balance—July 31, 2019 6.9 $ 188.16 1.5 $ 1,554.0 0.3 $ 197.86 1.8 $ 67.0 Granted 3.1 $ 208.19 — $ — Vested (2.0) $ 178.93 0.0 $ 168.17 Forfeited (0.9) $ 185.56 (0.1) $ 181.48 Balance—April 30, 2020 7.1 $ 199.76 1.5 $ 1,400.7 0.2 $ 202.99 1.3 $ 42.1 Our PSAs and PSUs generally vest over a period of three Share-Based Compensation The following table summarizes share-based compensation included in costs and expenses (in millions): Three Months Ended Nine Months Ended April 30, April 30, 2020 2019 2020 2019 Cost of product revenue $ 1.4 $ 1.3 $ 4.2 $ 4.3 Cost of subscription and support revenue 18.8 17.2 57.6 52.9 Research and development 67.7 45.1 197.4 129.6 Sales and marketing 55.5 54.5 155.0 169.2 General and administrative 22.7 20.1 76.0 75.7 Total share-based compensation $ 166.1 $ 138.2 $ 490.2 $ 431.7 During the three and nine months ended April 30, 2020, we accelerated the vesting of certain equity awards in connection with our acquisitions, as a result, we recorded $0.3 million and $6.0 million, respectively, of share-based compensation within general and administrative expense. As of April 30, 2020, total compensation cost related to unvested share-based awards not yet recognized was $1.6 billion . This cost is expected to be amortized over a weighted-average period of approximately 2.6 years . Future grants will increase the amount of compensation expense to be recorded in these periods.

Income Taxes (Notes)

Income Taxes (Notes)	9 Months Ended
	Apr. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	For the three and nine months ended April 30, 2020 our provision for income taxes reflects an effective tax rate of negative 10.3% and negative 13.5% respectively. Our effective tax rate for the nine months ended April 30, 2020 was negative as we recorded a provision for income taxes on year to date losses. The provision for income taxes for the nine months ended April 30, 2020 is primarily due to income taxes in profitable foreign jurisdictions, U.S. state taxes, and withholding taxes. Our effective tax rates differ from the U.S. statutory tax rate primarily due to deductibility of our share-based compensation, foreign income at other than U.S. tax rates, and changes in our valuation allowance. In December 2019, we transferred certain intellectual property rights to a wholly owned United Kingdom subsidiary, primarily to align our legal structure to our evolving operations. This resulted in an increase in the tax basis of these intellectual property rights and a corresponding increase in foreign deferred tax assets. As of April 30, 2019, it is not more likely than not that these additional deferred tax assets will be realizable, and therefore, are offset by a full valuation allowance. This resulted in no net impact to our condensed consolidated financial statements. Our provision for income taxes for the three and nine months ended April 30, 2019 reflects an effective tax rate of 4.3% and negative 0.3%, respectively. Our effective tax rate for the nine months ended April 30, 2019 was negative as we recorded a provision for income taxes on year to date losses. The key components of our income tax provision, excluding one-time items, primarily consisted of foreign and U.S. state income taxes and withholding taxes. During the nine months ended April 30, 2019, the effect of these key components was partially offset by a one-time tax benefit of $9.4 million and $4.9 million from partial releases of our valuation allowance related to the acquisitions of RedLock, Inc. and Demisto, Inc., recorded during the three months ended October 31, 2018 and April 30, 2019, respectively. Our effective tax rate differed from the U.S. statutory tax rate primarily due to deductibility of our share-based compensation, foreign income at other than U.S. tax rates, and changes in our valuation allowance.

Net Loss Per Share (Notes)

Net Loss Per Share (Notes)	9 Months Ended
	Apr. 30, 2020
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share Basic net loss per share is computed by dividing net loss by basic weighted-average shares outstanding during the period. Diluted net loss per share is computed by dividing net loss by diluted weighted-average shares outstanding, including potentially dilutive securities. The following table presents the computation of basic and diluted net loss per share of common stock (in millions, except per share data): Three Months Ended Nine Months Ended April 30, April 30, 2020 2019 2020 2019 Net loss $ (74.8) $ (20.2) $ (208.1) $ (61.1) Weighted-average shares used to compute net loss per share, basic and diluted 96.7 94.4 97.2 94.1 Net loss per share, basic and diluted $ (0.77) $ (0.21) $ (2.14) $ (0.65) The following securities were excluded from the computation of diluted net loss per share of common stock for the periods presented as their effect would have been antidilutive (in millions): Three and Nine Months Ended April 30, 2020 2019 Convertible senior notes 6.4 7.8 Warrants related to the issuance of convertible senior notes 6.4 11.6 RSUs and PSUs 7.3 7.0 Options to purchase common stock, including PSOs 3.1 4.2 RSAs and PSAs 0.1 0.1 ESPP shares 0.1 0.1 Total 23.4 30.8

Other Income, Net (Notes)

Other Income, Net (Notes)	9 Months Ended
	Apr. 30, 2020
Other Income and Expenses [Abstract]
Other Income, Net	Other Income, Net The following table sets forth the components of other income, net (in millions): Three Months Ended Nine Months Ended April 30, April 30, 2020 2019 2020 2019 Interest income $ 8.3 $ 18.3 $ 38.0 $ 51.7 Foreign currency exchange gains (losses), net 0.2 (0.1) (1.8) (1.3) Other (0.4) — (1.1) (3.2) Total other income, net $ 8.1 $ 18.2 $ 35.1 $ 47.2

Description of Business, Basi_2

Description of Business, Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Apr. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of business, basis of presentation, principles of consolidation, and summary of significant accounting policies	Description of Business Palo Alto Networks, Inc. (the “Company,” “we,” “us,” or “our”), located in Santa Clara, California, was incorporated in March 2005 under the laws of the State of Delaware and commenced operations in April 2005. We offer platforms that empower enterprises, service providers, and government entities to secure their organizations by safely enabling applications and data running in their networks, on their endpoints, and in the cloud, and by preventing breaches that stem from targeted cyberattacks. Basis of Presentation and Principles of Consolidation The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”), consistent in all material respects with those applied in our Annual Report on Form 10-K for the fiscal year ended July 31, 2019, filed with the Securities and Exchange Commission (“SEC”) on September 9, 2019. Our condensed consolidated financial statements include our accounts and our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Our condensed consolidated financial statements are unaudited, but include all adjustments of a normal recurring nature necessary for a fair presentation of our quarterly results. We have made estimates and judgments affecting the amounts reported in our condensed consolidated financial statements and the accompanying notes. The actual results that we experience may differ materially from our estimates. Certain prior period amounts have been reclassified to conform to our current period presentation. Our condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes in our Annual Report on Form 10-K for the fiscal year ended July 31, 2019. Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We base our estimates on historical experience and also on assumptions that we believe are reasonable. Actual results could differ materially from those estimates due to risks and uncertainties, including uncertainty in the current economic environment due to the recent outbreak of COVID-19. Summary of Significant Accounting Policies There have been no material changes to our significant accounting policies as of and for the nine months ended April 30, 2020, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended July 31, 2019, except for the change in our accounting policies for leases due to our adoption of new lease accounting guidance. Refer to “Recently Adopted Accounting Pronouncements” below and Note 10. Leases and Other Office Facilities.
Recent accounting pronouncements	Recently Adopted Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued new authoritative guidance on lease accounting. Among its provisions, the standard requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for operating leases and also requires additional qualitative and quantitative disclosures about lease arrangements. We adopted this standard effective August 1, 2019 on a modified retrospective basis, under which financial results reported in periods prior to fiscal 2020 were not adjusted. We elected the package of practical expedients, which allowed us to carry forward our historical assessments of whether contracts are or contain leases, lease classification, and initial direct costs. Additionally, we elected to account for lease and non-lease components as a single lease component and to not recognize right-of-use assets and lease liabilities for leases with a term of 12 months or less. The most significant impact of adopting this guidance was the recognition of $286.4 million of operating lease right-of-use assets and $442.4 million of operating lease liabilities on our condensed consolidated balance sheet as of August 1, 2019, which included reclassifying previously recognized $129.0 million in lease incentives, deferred or prepaid rent, as well as $27.0 million in cease-use liabilities to operating lease right-of-use assets. The adoption of this standard had no impact on our condensed consolidated statements of operations and condensed consolidated statements of cash flows. Refer to Note 10. Leases and Other Office Facilities for further discussion. Recently Issued Accounting Pronouncements Financial Instruments - Credit Losses In June 2016, the FASB issued new authoritative guidance on the accounting for credit losses on most financial assets and certain financial instruments. The standard replaces the existing incurred loss model with an expected credit loss model for financial assets measured at amortized cost, including trade receivables, and requires that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down. The standard is effective for us in our first quarter of fiscal 2021 and will be applied on a modified retrospective basis. We are currently evaluating whether this standard will have a material impact on our condensed consolidated financial statements.
Fair value measurements	Fair Value Measurements We categorize assets and liabilities recorded or disclosed at fair value on our condensed consolidated balance sheets based upon the level of judgment associated with inputs used to measure their fair value. The categories are as follows: • Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments. • Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.
Derivative instruments	Our derivative financial instruments are recorded at fair value, on a gross basis, as either assets or liabilities in our condensed consolidated balance sheets. Gains or losses related to our cash flow hedges are recorded as a component of accumulated other comprehensive income (loss) (“AOCI”) in our condensed consolidated balance sheets and are reclassified into the financial statement line item associated with the underlying hedged transaction in our condensed consolidated statements of operations when the underlying hedged transaction is recognized in earnings. If it becomes probable that the hedged transaction will not occur, the cumulative unrealized gain or loss is reclassified immediately from AOCI into the financial statement line item associated with the underlying hedged transaction in our condensed consolidated statements of operations. Gains or losses related to non-designated derivative instruments are recognized in other income (expense), net in our condensed consolidated statements of operations for each period until the instrument matures, is terminated, is re-designated as a qualified cash flow hedge, or is sold. Derivatives designated as cash flow hedges are classified in our condensed consolidated statements of cash flows in the same manner as the underlying hedged transaction, primarily within cash flows from operating activities.
Leases	We determine if an arrangement is a lease at inception. We evaluate classification of leases at commencement and, as necessary, at modification. Operating leases are included in operating lease right-of-use assets, accrued and other liabilities, and long-term operating lease liabilities on our condensed consolidated balance sheets beginning August 1, 2019. We did not have any material finance leases in any of the periods presented. Operating lease right-of-use assets represent our right to use an underlying asset for the lease term. Operating lease liabilities represent our obligation to make payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at the present value of the future lease payments at the lease commencement date. The interest rate used to determine the present value of the future lease payments is our incremental borrowing rate, because the interest rates implicit in most of our leases are not readily determinable. Our incremental borrowing rate is estimated to approximate the interest rate on a collateralized basis with similar terms and payments, and in economic environments where the leased asset is located. Operating lease right-of-use assets also include adjustments related to lease incentives, prepaid or accrued rent and initial direct lease costs. Operating lease right-of-use assets are subject to evaluation for impairment or disposal on a basis consistent with other long-lived assets. Our lease terms may include periods under options to extend or terminate the lease when it is reasonably certain that we will exercise that option. We generally use the base, non-cancelable lease term when determining the lease assets and liabilities. Operating lease cost is generally recognized on a straight-line basis over the lease term. We account for lease and non-lease components as a single lease component and do not recognize right-of-use assets and lease liabilities for leases with a term of 12 months or less. Payments under our lease arrangements are primarily fixed, however, certain lease agreements contain variable payments, which are expensed as incurred and not included in the operating lease right-of-use assets and liabilities. Variable lease payments are primarily comprised of payments affected by the Consumer Price Index, common area maintenance, and utility charges.
Share-based compensation, PSAs and PSUs	Our PSAs and PSUs generally vest over a period of three

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Apr. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue from external customers by geographic areas	The following table presents revenue by geographic theater (in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 Revenue: Americas United States $ 553.5 $ 464.3 $ 1,554.0 $ 1,314.8 Other Americas 40.7 33.5 114.5 108.2 Total Americas 594.2 497.8 1,668.5 1,423.0 Europe, the Middle East, and Africa (“EMEA”) 171.5 138.7 485.3 414.7 Asia Pacific and Japan (“APAC”) 103.7 90.1 304.2 256.1 Total revenue $ 869.4 $ 726.6 $ 2,458.0 $ 2,093.8
Revenue from external customers by products and services	The following table presents revenue for groups of similar products and services (in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 Revenue: Product $ 280.9 $ 278.4 $ 758.6 $ 790.5 Subscription and support Subscription 354.3 258.8 1,015.5 739.8 Support 234.2 189.4 683.9 563.5 Total subscription and support 588.5 448.2 1,699.4 1,303.3 Total revenue $ 869.4 $ 726.6 $ 2,458.0 $ 2,093.8

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Apr. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of fair value of financial assets and liabilities	The following table presents the fair value of our financial assets and liabilities measured at fair value on a recurring basis using the above input categories as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 762.6 $ — $ — $ 762.6 $ 369.1 $ — $ — $ 369.1 Certificates of deposit — — — — — 12.0 12.0 Commercial paper — — — — — 19.3 — 19.3 U.S. government and agency securities — — — — — 54.4 — 54.4 Total cash equivalents 762.6 — — 762.6 369.1 85.7 — 454.8 Short-term investments: Certificates of deposit — 22.3 — 22.3 — 17.5 — 17.5 Commercial paper — — — — — 8.9 — 8.9 Corporate debt securities — 95.1 — 95.1 — 375.5 — 375.5 U.S. government and agency securities — 436.7 — 436.7 — 1,439.8 — 1,439.8 Total short-term investments — 554.1 — 554.1 — 1,841.7 — 1,841.7 Long-term investments: Corporate debt securities — 46.0 — 46.0 — 214.3 — 214.3 U.S. government and agency securities — 105.2 — 105.2 — 361.1 — 361.1 Total long-term investments — 151.2 — 151.2 — 575.4 — 575.4 Prepaid expenses and other current assets: Foreign currency forward contracts — 0.3 — 0.3 — 1.3 — 1.3 Total prepaid expenses and other current assets — 0.3 — 0.3 — 1.3 — 1.3 Total assets measured at fair value $ 762.6 $ 705.6 $ — $ 1,468.2 $ 369.1 $ 2,504.1 $ — $ 2,873.2 Accrued and other liabilities: Foreign currency forward contracts $ — $ 3.3 $ — $ 3.3 $ — $ 3.8 $ — $ 3.8 Total accrued and other liabilities — 3.3 — 3.3 — 3.8 — 3.8 Total liabilities measured at fair value $ — $ 3.3 $ — $ 3.3 $ — $ 3.8 $ — $ 3.8

Cash Equivalents and Investme_2

Cash Equivalents and Investments (Tables)	9 Months Ended
	Apr. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of available-for-sale securities	The following tables summarize the amortized cost, unrealized gains and losses, and fair value of our available-for-sale debt securities as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Investments: Certificates of deposit $ 22.3 $ — $ — $ 22.3 Corporate debt securities 139.4 1.7 — 141.1 U.S. government and agency securities 537.6 4.3 — 541.9 Total available-for-sale investments $ 699.3 $ 6.0 $ — $ 705.3 July 31, 2019 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash equivalents: Certificates of deposit $ 12.0 $ — $ — $ 12.0 Commercial paper 19.3 — — 19.3 U.S. government and agency securities 54.4 — — 54.4 Total available-for-sale cash equivalents $ 85.7 $ — $ — $ 85.7 Investments: Certificates of deposit $ 17.5 $ — $ — $ 17.5 Commercial paper 8.9 — — 8.9 Corporate debt securities 587.8 2.3 (0.3) 589.8 U.S. government and agency securities 1,799.5 2.6 (1.2) 1,800.9 Total available-for-sale investments $ 2,413.7 $ 4.9 $ (1.5) $ 2,417.1
Schedule of contractual maturities of available-for-sale securities	The following table summarizes the amortized cost and fair value of our available-for-sale debt securities as of April 30, 2020, by contractual years-to-maturity (in millions): Amortized Cost Fair Value Due within one year $ 551.0 $ 554.1 Due between one and three years 148.3 151.2 Total $ 699.3 $ 705.3

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Apr. 30, 2020
Aporeto, Inc.
Business Acquisition
Schedule of purchase consideration	The total purchase consideration for the acquisition of Aporeto was $144.1 million, which consisted of the following (in millions): Amount Cash $ 139.8 Fair value of replacement awards 4.3 Total $ 144.1
Schedule of recognized identified assets acquired and liabilities assumed	We have accounted for this transaction as a business combination and allocated the purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values, as presented in the following table (in millions): Amount Goodwill $ 111.3 Identified intangible assets 23.8 Cash 10.5 Net liabilities assumed (1.5) Total $ 144.1
Schedule of finite-lived intangible assets acquired as part of business combination	The following table presents details of the identified intangible assets acquired (in millions, except years): Fair Value Estimated Useful Life Developed technology $ 20.5 7 years Customer relationships 3.3 4 years Total $ 23.8
Zingbox, Inc. [Member]
Business Acquisition
Schedule of recognized identified assets acquired and liabilities assumed	We have accounted for this transaction as a business combination and allocated the purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values, as presented in the following table (in millions): Amount Goodwill $ 48.1 Identified intangible assets 20.4 Net liabilities assumed (2.1) Total $ 66.4
Schedule of finite-lived intangible assets acquired as part of business combination	The following table presents details of the identified intangible assets acquired (in millions, except years): Fair Value Estimated Useful Life Developed technology $ 18.6 5 years Customer relationships 1.8 8 years Total $ 20.4
CloudGenix, Inc. [Member]
Business Acquisition
Schedule of purchase consideration	The total purchase consideration for the acquisition of CloudGenix was $402.7 million, which consisted of the following (in millions): Amount Cash $ 396.1 Fair value of replacement awards 6.6 Total $ 402.7
Schedule of recognized identified assets acquired and liabilities assumed	We have accounted for this transaction as a business combination and allocated the purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values, as presented in the following table (in millions): Amount Goodwill $ 301.2 Identified intangible assets 109.9 Cash 8.3 Net liabilities assumed (16.7) Total $ 402.7
Schedule of finite-lived intangible assets acquired as part of business combination	The following table presents details of the identified intangible assets acquired (in millions, except years): Fair Value Estimated Useful Life Developed technology $ 67.2 5 years Customer relationships 42.7 10 years Total $ 109.9

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Apr. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The following table presents details of our goodwill during the nine months ended April 30, 2020 (in millions): Amount Balance as of July 31, 2019 $ 1,352.3 Goodwill acquired 460.6 Balance as of April 30, 2020 $ 1,812.9
Schedule of purchased finite-lived intangible assets by major class	The following table presents details of our purchased intangible assets as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Developed technology $ 425.9 $ (126.5) $ 299.4 $ 318.8 $ (78.7) $ 240.1 Customer relationships 87.6 (9.7) 77.9 39.8 (4.7) 35.1 Acquired intellectual property 8.9 (5.6) 3.3 8.9 (5.1) 3.8 Trade name and trademarks 9.4 (9.4) — 9.4 (9.4) — Other 2.2 (2.2) — 2.2 (2.2) — Total intangible assets subject to amortization 534.0 (153.4) 380.6 379.1 (100.1) 279.0 Intangible assets not subject to amortization: In-process research and development — — — 1.6 — 1.6 Total purchased intangible assets $ 534.0 $ (153.4) $ 380.6 $ 380.7 $ (100.1) $ 280.6
Schedule of purchased indefinite-lived intangible assets by major class	The following table presents details of our purchased intangible assets as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Developed technology $ 425.9 $ (126.5) $ 299.4 $ 318.8 $ (78.7) $ 240.1 Customer relationships 87.6 (9.7) 77.9 39.8 (4.7) 35.1 Acquired intellectual property 8.9 (5.6) 3.3 8.9 (5.1) 3.8 Trade name and trademarks 9.4 (9.4) — 9.4 (9.4) — Other 2.2 (2.2) — 2.2 (2.2) — Total intangible assets subject to amortization 534.0 (153.4) 380.6 379.1 (100.1) 279.0 Intangible assets not subject to amortization: In-process research and development — — — 1.6 — 1.6 Total purchased intangible assets $ 534.0 $ (153.4) $ 380.6 $ 380.7 $ (100.1) $ 280.6
Future amortization expense of intangible assets	The following table summarizes estimated future amortization expense of our intangible assets as of April 30, 2020 (in millions): Amount Fiscal years ending July 31: Remaining 2020 $ 22.9 2021 89.7 2022 85.3 2023 59.1 2024 51.1 2025 and thereafter 72.5 Total future amortization expense $ 380.6

Deferred Contract Costs (Tables

Deferred Contract Costs (Tables)	9 Months Ended
	Apr. 30, 2020
Revenue from Contract with Customer [Abstract]
Schedule of deferred contract costs	The following table presents details of our short-term and long-term deferred contract costs as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Short-term deferred contract costs $ 173.7 $ 151.1 Long-term deferred contract costs 343.6 324.2 Total deferred contract costs $ 517.3 $ 475.3

Debt (Tables)

Debt (Tables)	9 Months Ended
	Apr. 30, 2020
Debt Disclosure [Abstract]
Components of convertible senior notes	The following table sets forth the components of the 2023 Notes as of April 30, 2020 and July 31, 2019 (in millions): April 30, 2020 July 31, 2019 Liability component: Principal $ 1,693.0 $ 1,693.0 Less: debt discount and debt issuance costs, net of amortization 216.0 263.0 Net carrying amount $ 1,477.0 $ 1,430.0 Equity component $ 315.0 $ 315.0
Interest expense recognized related to the convertible senior notes	The following table sets forth interest expense recognized related to the Notes (dollars in millions): Three Months Ended April 30, Nine Months Ended April 30, 2020 2019 2020 2019 2019 Notes 2023 Notes Total 2019 Notes 2023 Notes Total 2019 Notes 2023 Notes Total 2019 Notes 2023 Notes Total Contractual interest expense $ — $ 3.2 $ 3.2 $ — $ 3.3 $ 3.3 $ — $ 9.5 $ 9.5 $ — $ 9.6 $ 9.6 Amortization of debt discount — 15.3 15.3 1.6 14.7 16.3 — 45.5 45.5 7.6 43.6 51.2 Amortization of debt issuance costs — 0.5 0.5 0.3 0.5 0.8 — 1.5 1.5 1.0 1.4 2.4 Total interest expense recognized $ — $ 19.0 $ 19.0 $ 1.9 $ 18.5 $ 20.4 $ — $ 56.5 $ 56.5 $ 8.6 $ 54.6 $ 63.2 Effective interest rate of the liability component — % 5.2 % 4.8 % 5.2 % — % 5.2 % 4.8 % 5.2 %
Warrants details	The following table presents details of the Warrants (in millions, except per share data): Initial Number Strike Price Aggregate 2019 Warrants 5.2 $ 137.85 $ 78.3 2023 Warrants 6.4 $ 417.80 $ 145.4

Leases (Tables)

Leases (Tables)	9 Months Ended
	Apr. 30, 2020
Leases [Abstract]
Schedule of Operating Leases, Additional Information	The following tables present additional information for our operating leases (in millions, except for years and percentages): Nine Months Ended April 30, 2020 Operating cash flows used in payments of operating lease liabilities $ 50.3 Right-of-use assets obtained in exchange for new operating lease liabilities $ 21.0 April 30, 2020 Weighted-average remaining lease term 7.2 years Weighted-average discount rate 3.9 %
Schedule of maturities of operating lease liabilities	The following table presents maturities of operating lease liabilities as of April 30, 2020 (in millions): Amount Fiscal years ending July 31: Remaining 2020 $ 15.0 2021 73.9 2022 67.0 2023 61.2 2024 50.5 2025 and thereafter 195.9 Total operating lease payments 463.5 Less: imputed interest 61.6 Present value of operating lease liabilities $ 401.9 Current portion of operating lease liabilities (1) $ 57.3 Long-term operating lease liabilities $ 344.6 ______________ (1) Current portion of operating lease liabilities is included in accrued and other liabilities on our condensed consolidated balance sheet.

Commitments and Contingencies_2

Commitments and Contingencies (Tables)	9 Months Ended
	Apr. 30, 2020
Cloud and other services
Unrecorded Unconditional Purchase Obligation
Schedule of future non-cancelable purchase commitments for cloud services	he following table presents details of the aggregate future non-cancelable purchase commitments under these agreements as of April 30, 2020 (in millions): Amount Fiscal years ending July 31: Remaining 2020 $ 1.7 2021 11.7 2022 49.8 2023 58.5 2024 67.5 2025 and thereafter 97.5 Total other purchase commitments $ 286.7

Equity Award Plans (Tables)

Equity Award Plans (Tables)	9 Months Ended
	Apr. 30, 2020
Share-based Payment Arrangement [Abstract]
Schedule of stock option and performance stock option (PSO) activity	The following table summarizes the stock option and performance stock option (“PSO”) activity under our stock plans during the reporting period (in millions, except per share amounts): Stock Options Outstanding PSOs Outstanding Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Balance—July 31, 2019 0.3 $ 14.53 2.2 $ 81.4 3.7 $ 193.99 6.2 $ 120.1 Exercised (0.1) $ 11.66 — $ — Forfeited — $ — (0.8) $ 193.51 Balance—April 30, 2020 0.2 $ 17.57 1.7 $ 33.3 2.9 $ 194.11 5.5 $ 9.4 Exercisable—April 30, 2020 0.2 $ 17.57 1.7 $ 33.3 2.9 $ 194.11 5.5 $ 9.4
Schedule of restricted stock award (“RSA”), performance-based stock award (“PSA”), restricted stock unit (“RSU”), and performance-based stock unit (“PSU”) activities	The following table summarizes the RSA and PSA activity under our stock plans during the reporting period (in millions, except per share amounts): RSAs Outstanding PSAs Outstanding Number of Shares Weighted-Average Grant-Date Fair Value Per Share Number of Shares Weighted-Average Grant-Date Fair Value Per Share Balance—July 31, 2019 0.0 $ 148.54 0.1 $ 148.54 Vested 0.0 $ 148.54 0.0 $ 148.54 Balance—April 30, 2020 0.0 $ 148.54 0.1 $ 148.54 The following table summarizes the RSU and PSU activity under our stock plans during the reporting period (in millions, except per share amounts): RSUs Outstanding PSUs Outstanding Number of Shares Weighted-Average Grant-Date Fair Value Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Number of Shares Weighted-Average Grant-Date Fair Value Per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value Balance—July 31, 2019 6.9 $ 188.16 1.5 $ 1,554.0 0.3 $ 197.86 1.8 $ 67.0 Granted 3.1 $ 208.19 — $ — Vested (2.0) $ 178.93 0.0 $ 168.17 Forfeited (0.9) $ 185.56 (0.1) $ 181.48 Balance—April 30, 2020 7.1 $ 199.76 1.5 $ 1,400.7 0.2 $ 202.99 1.3 $ 42.1
Schedule of allocation of share-based compensation expense	The following table summarizes share-based compensation included in costs and expenses (in millions): Three Months Ended Nine Months Ended April 30, April 30, 2020 2019 2020 2019 Cost of product revenue $ 1.4 $ 1.3 $ 4.2 $ 4.3 Cost of subscription and support revenue 18.8 17.2 57.6 52.9 Research and development 67.7 45.1 197.4 129.6 Sales and marketing 55.5 54.5 155.0 169.2 General and administrative 22.7 20.1 76.0 75.7 Total share-based compensation $ 166.1 $ 138.2 $ 490.2 $ 431.7

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Apr. 30, 2020
Earnings Per Share [Abstract]
Computation of basic and diluted net loss per share of common stock	The following table presents the computation of basic and diluted net loss per share of common stock (in millions, except per share data): Three Months Ended Nine Months Ended April 30, April 30, 2020 2019 2020 2019 Net loss $ (74.8) $ (20.2) $ (208.1) $ (61.1) Weighted-average shares used to compute net loss per share, basic and diluted 96.7 94.4 97.2 94.1 Net loss per share, basic and diluted $ (0.77) $ (0.21) $ (2.14) $ (0.65)
Schedule of antidilutive securities excluded from the computation of net loss per share	The following securities were excluded from the computation of diluted net loss per share of common stock for the periods presented as their effect would have been antidilutive (in millions): Three and Nine Months Ended April 30, 2020 2019 Convertible senior notes 6.4 7.8 Warrants related to the issuance of convertible senior notes 6.4 11.6 RSUs and PSUs 7.3 7.0 Options to purchase common stock, including PSOs 3.1 4.2 RSAs and PSAs 0.1 0.1 ESPP shares 0.1 0.1 Total 23.4 30.8

Other Income, Net (Tables)

Other Income, Net (Tables)	9 Months Ended
	Apr. 30, 2020
Other Income and Expenses [Abstract]
Schedule of components of other income, net	The following table sets forth the components of other income, net (in millions): Three Months Ended Nine Months Ended April 30, April 30, 2020 2019 2020 2019 Interest income $ 8.3 $ 18.3 $ 38.0 $ 51.7 Foreign currency exchange gains (losses), net 0.2 (0.1) (1.8) (1.3) Other (0.4) — (1.1) (3.2) Total other income, net $ 8.1 $ 18.2 $ 35.1 $ 47.2

Description of Business, Basi_3

Description of Business, Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies (Recently Adopted Accounting Pronouncements - Leases) (Details) - USD ($) $ in Millions	Apr. 30, 2020	Aug. 01, 2019	Jul. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle
Operating lease right-of-use assets	$ 263.8		$ 0
Long-term operating lease liabilities	$ 344.6		$ 0
New accounting pronouncement - leases
New Accounting Pronouncements or Change in Accounting Principle
Operating lease right-of-use assets		$ 286.4
Long-term operating lease liabilities		442.4
Lease incentives and Deferred or Prepaid Rent		129
Cease-use liability		$ 27

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue - Geographic Theater) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Disaggregation of Revenue
Revenue	$ 869.4	$ 726.6	$ 2,458	$ 2,093.8
United States
Disaggregation of Revenue
Revenue	553.5	464.3	1,554	1,314.8
Other Americas
Disaggregation of Revenue
Revenue	40.7	33.5	114.5	108.2
Total Americas
Disaggregation of Revenue
Revenue	594.2	497.8	1,668.5	1,423
EMEA
Disaggregation of Revenue
Revenue	171.5	138.7	485.3	414.7
APAC
Disaggregation of Revenue
Revenue	$ 103.7	$ 90.1	$ 304.2	$ 256.1

Revenue (Disaggregation of Re_2

Revenue (Disaggregation of Revenue - Type of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenue:
Revenue	$ 869.4	$ 726.6	$ 2,458	$ 2,093.8
Product
Revenue:
Revenue	280.9	278.4	758.6	790.5
Subscription
Revenue:
Revenue	354.3	258.8	1,015.5	739.8
Support
Revenue:
Revenue	234.2	189.4	683.9	563.5
Subscription and support
Revenue:
Revenue	$ 588.5	$ 448.2	$ 1,699.4	$ 1,303.3

Revenue (Deferred Revenue) (Det

Revenue (Deferred Revenue) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2020USD ($)
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 1,265

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations) (Details) $ in Billions	Apr. 30, 2020USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 3.5
Remaining Performance Obligations, Expected Timing of Satisfaction, Start Date: 2020-02-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 1.9
Remaining Performance Obligations, Expected Timing of Satisfaction
Remaining performance obligations, expected timing of satisfaction, period	12 months

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Fair value, measurements, recurring - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	$ 762.6	$ 454.8
Short-term investments	554.1	1,841.7
Long-term investments	151.2	575.4
Prepaid expenses and other current assets	0.3	1.3
Total assets measured at fair value	1,468.2	2,873.2
Accrued and other liabilities	3.3	3.8
Total liabilities measured at fair value	3.3	3.8
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	762.6	369.1
Short-term investments	0	0
Long-term investments	0	0
Prepaid expenses and other current assets	0	0
Total assets measured at fair value	762.6	369.1
Accrued and other liabilities	0	0
Total liabilities measured at fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	85.7
Short-term investments	554.1	1,841.7
Long-term investments	151.2	575.4
Prepaid expenses and other current assets	0.3	1.3
Total assets measured at fair value	705.6	2,504.1
Accrued and other liabilities	3.3	3.8
Total liabilities measured at fair value	3.3	3.8
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Long-term investments	0	0
Prepaid expenses and other current assets	0	0
Total assets measured at fair value	0	0
Accrued and other liabilities	0	0
Total liabilities measured at fair value	0	0
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	762.6	369.1
Money market funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	762.6	369.1
Money market funds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Money market funds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	19.3
Short-term investments	0	8.9
Commercial paper | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Commercial paper | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	19.3
Short-term investments	0	8.9
Commercial paper | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	95.1	375.5
Long-term investments	46	214.3
Corporate debt securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
Corporate debt securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	95.1	375.5
Long-term investments	46	214.3
Corporate debt securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments	0	0
Long-term investments	0	0
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	54.4
Short-term investments	436.7	1,439.8
Long-term investments	105.2	361.1
U.S. government and agency securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Long-term investments	0	0
U.S. government and agency securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	54.4
Short-term investments	436.7	1,439.8
Long-term investments	105.2	361.1
U.S. government and agency securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Long-term investments	0	0
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	12
Short-term investments	22.3	17.5
Certificates of deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Short-term investments	0	0
Certificates of deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	12
Short-term investments	22.3	17.5
Certificates of deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0
Short-term investments	0	0
Foreign currency forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forward contracts assets	0.3	1.3
Foreign currency forward contracts liabilities	3.3	3.8
Foreign currency forward contracts | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forward contracts assets	0	0
Foreign currency forward contracts liabilities	0	0
Foreign currency forward contracts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forward contracts assets	0.3	1.3
Foreign currency forward contracts liabilities	3.3	3.8
Foreign currency forward contracts | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forward contracts assets	0	0
Foreign currency forward contracts liabilities	$ 0	$ 0

Cash Equivalents and Investme_3

Cash Equivalents and Investments (Available-for-Sale Securities) (Details) - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Debt Securities, Available-for-sale
Amortized cost	$ 699.3
Fair value	705.3
Cash equivalents
Debt Securities, Available-for-sale
Amortized cost		$ 85.7
Unrealized gains		0
Unrealized losses		0
Fair value		85.7
Cash equivalents | Certificates of deposit
Debt Securities, Available-for-sale
Amortized cost		12
Unrealized gains		0
Unrealized losses		0
Fair value		12
Cash equivalents | Commercial paper
Debt Securities, Available-for-sale
Amortized cost		19.3
Unrealized gains		0
Unrealized losses		0
Fair value		19.3
Cash equivalents | U.S. government and agency securities
Debt Securities, Available-for-sale
Amortized cost		54.4
Unrealized gains		0
Unrealized losses		0
Fair value		54.4
Investments
Debt Securities, Available-for-sale
Amortized cost	699.3	2,413.7
Unrealized gains	6	4.9
Unrealized losses	0	(1.5)
Fair value	705.3	2,417.1
Investments | Certificates of deposit
Debt Securities, Available-for-sale
Amortized cost	22.3	17.5
Unrealized gains	0	0
Unrealized losses	0	0
Fair value	22.3	17.5
Investments | Commercial paper
Debt Securities, Available-for-sale
Amortized cost		8.9
Unrealized gains		0
Unrealized losses		0
Fair value		8.9
Investments | Corporate debt securities
Debt Securities, Available-for-sale
Amortized cost	139.4	587.8
Unrealized gains	1.7	2.3
Unrealized losses	0	(0.3)
Fair value	141.1	589.8
Investments | U.S. government and agency securities
Debt Securities, Available-for-sale
Amortized cost	537.6	1,799.5
Unrealized gains	4.3	2.6
Unrealized losses	0	(1.2)
Fair value	$ 541.9	$ 1,800.9

Cash Equivalents and Investme_4

Cash Equivalents and Investments (Available-for-Sale Securities, Contractual Maturities) (Details) $ in Millions	Apr. 30, 2020USD ($)
Amortized Cost
Due within one year	$ 551
Due between one and three years	148.3
Amortized cost	699.3
Fair Value
Due within one year	554.1
Due between one and three years	151.2
Total fair value	$ 705.3

Cash Equivalents and Investme_5

Cash Equivalents and Investments (Marketable Equity Securities) (Details) - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Cash and cash equivalents | Marketable equity securities | Money market funds
Marketable Equity Securities
Marketable equity securities	$ 762.6	$ 369.1

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2020	Jul. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Maximum contract term of cash flow hedge	15 months
Notional amount	$ 106,000	$ 307,200

Acquisitions (Additional Inform

Acquisitions (Additional Information) (Details) - USD ($) $ in Millions	Apr. 21, 2020	Dec. 23, 2019	Sep. 20, 2019
Aporeto, Inc. [Member]
Business Acquisition
Percentage of voting equity interest acquired		100.00%
Business Combination, Consideration Transferred		$ 144.1
Total fair value of replacement equity awards		$ 16.4
Zingbox, Inc. [Member]
Business Acquisition
Percentage of voting equity interest acquired			100.00%
Business Combination, Consideration Transferred			$ 66.4
Total fair value of replacement equity awards			$ 5.7
CloudGenix, Inc. [Member]
Business Acquisition
Percentage of voting equity interest acquired	100.00%
Business Combination, Consideration Transferred	$ 402.7
Total fair value of replacement equity awards	$ 30.3

Acquisitions (Purchase Price Al

Acquisitions (Purchase Price Allocation) (Details) - USD ($) $ in Millions	Apr. 21, 2020	Dec. 23, 2019	Sep. 20, 2019	Apr. 30, 2020	Jul. 31, 2019
Business Acquisition
Goodwill				$ 1,812.9	$ 1,352.3
Zingbox, Inc. [Member]
Business Acquisition
Business Combination, Consideration Transferred			$ 66.4
Goodwill			48.1
Identified intangible assets			20.4
Net liabilities assumed			(2.1)
Total			$ 66.4
Aporeto, Inc. [Member]
Business Acquisition
Payments to Acquire Businesses, Gross		$ 139.8
Business Acquisition Replacement Awards, Fair Value		4.3
Business Combination, Consideration Transferred		144.1
Goodwill		111.3
Identified intangible assets		23.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		10.5
Net liabilities assumed		(1.5)
Total		$ 144.1
CloudGenix, Inc. [Member]
Business Acquisition
Payments to Acquire Businesses, Gross	$ 396.1
Business Acquisition Replacement Awards, Fair Value	6.6
Business Combination, Consideration Transferred	402.7
Goodwill	301.2
Identified intangible assets	109.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	8.3
Net liabilities assumed	(16.7)
Total	$ 402.7

Acquisitions (Intangible assets

Acquisitions (Intangible assets acquired as part of business combination) (Details) - USD ($) $ in Millions	Apr. 21, 2020	Dec. 23, 2019	Sep. 20, 2019	Apr. 30, 2020	Jul. 31, 2019
Finite-Lived Intangible Assets
Goodwill				$ 1,812.9	$ 1,352.3
Zingbox, Inc. [Member]
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired			$ 20.4
Goodwill			48.1
Identified intangible assets			20.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Liabilities Assumed			2.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			66.4
Zingbox, Inc. [Member] | Developed technology
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired			$ 18.6
Estimated useful life (in years)			5 years
Zingbox, Inc. [Member] | Customer relationships
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired			$ 1.8
Estimated useful life (in years)			8 years
Aporeto, Inc. [Member]
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired		$ 23.8
Goodwill		111.3
Identified intangible assets		23.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		10.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Liabilities Assumed		1.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		144.1
Aporeto, Inc. [Member] | Developed technology
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired		$ 20.5
Estimated useful life (in years)		7 years
Aporeto, Inc. [Member] | Customer relationships
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired		$ 3.3
Estimated useful life (in years)		4 years
CloudGenix, Inc. [Member]
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired	$ 109.9
Goodwill	301.2
Identified intangible assets	109.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	8.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Liabilities Assumed	16.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	402.7
CloudGenix, Inc. [Member] | Developed technology
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired	$ 67.2
Estimated useful life (in years)	5 years
CloudGenix, Inc. [Member] | Customer relationships
Finite-Lived Intangible Assets
Fair value of identified intangible assets acquired	$ 42.7
Estimated useful life (in years)	10 years

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Goodwill) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2020USD ($)
Goodwill Rollforward
Balance as of July 31, 2019	$ 1,352.3
Goodwill acquired	460.6
Balance as of April 30, 2020	$ 1,812.9

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Purchased Intangible Assets by Major Class) (Details) - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Total purchased intangible assets, gross carrying amount	$ 534	$ 380.7
Total purchased intangible assets, net carrying amount	380.6	280.6
Finite-Lived Intangible Assets
Gross carrying amount	534	379.1
Accumulated amortization	(153.4)	(100.1)
Net carrying amount	380.6	279
In-process research and development
Indefinite-lived Intangible Assets
In-process research and development	0	1.6
Developed technology
Finite-Lived Intangible Assets
Gross carrying amount	425.9	318.8
Accumulated amortization	(126.5)	(78.7)
Net carrying amount	299.4	240.1
Customer relationships
Finite-Lived Intangible Assets
Gross carrying amount	87.6	39.8
Accumulated amortization	(9.7)	(4.7)
Net carrying amount	77.9	35.1
Acquired intellectual property
Finite-Lived Intangible Assets
Gross carrying amount	8.9	8.9
Accumulated amortization	(5.6)	(5.1)
Net carrying amount	3.3	3.8
Trade name and trademarks
Finite-Lived Intangible Assets
Gross carrying amount	9.4	9.4
Accumulated amortization	(9.4)	(9.4)
Net carrying amount	0	0
Other
Finite-Lived Intangible Assets
Gross carrying amount	2.2	2.2
Accumulated amortization	(2.2)	(2.2)
Net carrying amount	$ 0	$ 0

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Amortization Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 19.3	$ 14.7	$ 54.1	$ 38.5

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets (Future Amortization Expense of Intangible Assets) (Details) - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining 2020	$ 22.9
2021	89.7
2022	85.3
2023	59.1
2024	51.1
2025 and thereafter	72.5
Net carrying amount	$ 380.6	$ 279

Deferred Contract Costs Deferre

Deferred Contract Costs Deferred Contract Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019	Jul. 31, 2019
Deferred Contract Costs
Deferred contract costs	$ 517.3		$ 517.3		$ 475.3
Deferred contract costs, amortization expense	60.5	$ 57.2	171.4	$ 147.6
Short-term
Deferred Contract Costs
Deferred contract costs	173.7		173.7		151.1
Long-term
Deferred Contract Costs
Deferred contract costs	$ 343.6		$ 343.6		$ 324.2

Debt (Additional Details) (Deta

Debt (Additional Details) (Details) $ / shares in Units, shares in Millions, $ in Millions	Jul. 31, 2018USD ($)dayshares$ / shares	Apr. 30, 2020USD ($)	Jul. 31, 2019USD ($)	Jun. 30, 2014USD ($)
2019 Notes
Debt Instrument, Redemption
Aggregate principal amount | $				$ 575
Contractual interest rate (in percentage)				0.00%
2023 Notes
Debt Instrument, Redemption
Aggregate principal amount | $	$ 1,700
Contractual interest rate (in percentage)	0.75%
Initial conversion rate (in shares per $1,000 principal amount)	3.7545
Initial conversion price (in usd per share) | $ / shares	$ 266.35
Number of common stock convertible at initial conversion rate (in shares) | shares	6.4
Threshold trading days (in days) | day	20
Threshold consecutive trading days (in days) | day	30
Threshold percentage of stock price trigger (in percentage)	130.00%
Threshold business days, per $1,000 principal (in days) | day	5
Threshold consecutive trading days, per $1,000 principal (in days) | day	5
Threshold percentage of notes price trigger, per $1,000 principal (in percentage)	98.00%
Repurchase price as percentage of principal amount in event of change (in percentage)	100.00%
Aggregate principal amount outstanding | $		$ 1,693	$ 1,693
2023 Notes | Level 2
Debt Instrument, Redemption
Fair value of convertible senior notes | $		$ 1,700	$ 1,900

Debt (Components of Convertible

Debt (Components of Convertible Senior Notes) (Details) - 2023 Notes - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Debt Instrument, Redemption
Principal	$ 1,693	$ 1,693
Less: debt discount and debt issuance costs, net of amortization	216	263
Net carrying amount	1,477	1,430
Equity component	$ 315	$ 315

Debt (Schedule of Interest Expe

Debt (Schedule of Interest Expense Recognized) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Debt Instrument, Redemption
Contractual interest expense	$ 3.2	$ 3.3	$ 9.5	$ 9.6
Amortization of debt discount	15.3	16.3	45.5	51.2
Amortization of debt issuance costs	0.5	0.8	1.5	2.4
Total interest expense recognized	19	20.4	56.5	63.2
2019 Notes
Debt Instrument, Redemption
Contractual interest expense	0	0	0	0
Amortization of debt discount	0	1.6	0	7.6
Amortization of debt issuance costs	0	0.3	0	1
Total interest expense recognized	$ 0	$ 1.9	$ 0	$ 8.6
Effective interest rate of the liability component (in percentage)	0.00%	4.80%	0.00%	4.80%
2023 Notes
Debt Instrument, Redemption
Contractual interest expense	$ 3.2	$ 3.3	$ 9.5	$ 9.6
Amortization of debt discount	15.3	14.7	45.5	43.6
Amortization of debt issuance costs	0.5	0.5	1.5	1.4
Total interest expense recognized	$ 19	$ 18.5	$ 56.5	$ 54.6
Effective interest rate of the liability component (in percentage)	5.20%	5.20%	5.20%	5.20%

Debt (Note Hedges) (Details)

Debt (Note Hedges) (Details) - USD ($) shares in Millions, $ in Millions	Jul. 31, 2018	Apr. 30, 2019
Schedule of Note Hedge Transactions
Common stock shares received from exercise of note hedges (in shares)		1.7
2023 Note Hedges
Schedule of Note Hedge Transactions
Shares of common stock covered by note hedges (in shares)	6.4
Aggregate amount paid to purchase note hedges - additional paid-in capital	$ 332

Debt (Warrants) (Details)

Debt (Warrants) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Jul. 31, 2018	Jun. 30, 2014	Apr. 30, 2020
2019 Warrants
Class of Warrant or Right
Common stock issued, settlement of warrant exercises (in shares)			2
Common stock issued, settlement of warrant exercises, fair value			$ 462
Warrants sold, shares authorized to sell to counterparties (in shares)		5.2
Strike price of warrants (in usd per share)		$ 137.85
Proceeds from issuance of warrants		$ 78.3
2023 Warrants
Class of Warrant or Right
Warrants sold, shares authorized to sell to counterparties (in shares)	6.4
Strike price of warrants (in usd per share)	$ 417.80
Proceeds from issuance of warrants	$ 145.4

Debt (Revolving Credit Facility

Debt (Revolving Credit Facility) (Details) - Revolving credit facility $ in Millions	Sep. 04, 2018USD ($)day	Apr. 30, 2020USD ($)
Line of Credit Facility
Current borrowing capacity	$ 400
Option for additional borrowing capacity	$ 350
Revolving credit facility amount outstanding		$ 0
Minimum maturity date term criteria
Line of Credit Facility
Number of days prior to maturity of 2023 Notes (in days) | day	91
Minimum maturity date term, cash and cash equivalents balance criteria
Line of Credit Facility
Amount added to outstanding principal amount of 2023 Notes in minimum maturity date criteria	$ 400
Minimum
Line of Credit Facility
Commitment fee rate on undrawn amounts (in percentage)	0.125%
Maximum
Line of Credit Facility
Commitment fee rate on undrawn amounts (in percentage)	0.25%
Base rate | Minimum
Line of Credit Facility
Spread on variable rate	0.00%
Base rate | Maximum
Line of Credit Facility
Spread on variable rate	0.75%
LIBOR | Minimum
Line of Credit Facility
Spread on variable rate	1.00%
LIBOR | Maximum
Line of Credit Facility
Spread on variable rate	1.75%

Leases (Additional Details) (De

Leases (Additional Details) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2019	Apr. 30, 2020	Apr. 30, 2020	Apr. 30, 2019
Leases [Abstract]
Original lease periods, expiration date			Jul. 31, 2028
Early termination of operating leases	$ 25
Decrease in operating lease, liability	13.6
Decrease in right-of-use asset	$ 8.7
Gain on Termination of Lease			$ 3.1	$ (4.1)
Termination of lease, general and administrative expense			1.8
Operating leases, net cost		$ 19.6	53.1
Operating lease, cost		$ 17.1	$ 46.3

Leases Additional Information o

Leases Additional Information on Operating Leases) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2020USD ($)
Leases [Abstract]
Operating cash flows used in payments of operating lease liabilities	$ 50.3
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 21
Weighted-average remaining lease term	7 years 2 months 12 days
Weighted-average discount rate	3.90%

Leases (Maturities of Operating

Leases (Maturities of Operating Lease Liabilities) (Details) - USD ($) $ in Millions	Apr. 30, 2020	Jul. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remaining 2020	$ 15
2021	73.9
2022	67
2023	61.2
2024	50.5
2025 and thereafter	195.9
Total operating lease payments	463.5
Less: imputed interest	61.6
Present value of operating lease liabilities	401.9
Current portion of operating lease liabilities	57.3
Long-term operating lease liabilities	$ 344.6	$ 0

Leases (Other Information on Su

Leases (Other Information on Sublease Income) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2020USD ($)
Leases [Abstract]
Lessee, operating lease, sublease income, total future income	$ 5.1
Lessee, operating lease, sublease income, remaining 2020	1.3
Lessee, operating lease, sublease income, 2021	$ 3.8

Leases - Land Purchase (Details

Leases - Land Purchase (Details) - Land Adjacent To Headquarters, Santa Clara, CA $ in Millions	3 Months Ended
	Apr. 30, 2020USD ($)Acre
Lessee, Lease, Description [Line Items]
Land purchase, consideration transferred | $	$ 51.7
Land purchased, number of acres acquired | Acre	5.8

Commitments and Contingencies_3

Commitments and Contingencies (Manufacturing Purchase Commitments) (Details) $ in Millions	Apr. 30, 2020USD ($)
Manufacturing products and components
Unrecorded Unconditional Purchase Obligation
Manufacturing purchase commitments	$ 124.3

Commitments and Contingencies_4

Commitments and Contingencies (Other Purchase Commitments) (Details) - Cloud and other services $ in Millions	Apr. 30, 2020USD ($)
Unrecorded Unconditional Purchase Obligation
Remaining 2020	$ 1.7
2021	11.7
2022	49.8
2023	58.5
2024	67.5
2025 and thereafter	97.5
Total other purchase commitments	$ 286.7

Commitments and Contingencies C

Commitments and Contingencies Covenant not to sue (Details) $ in Millions	1 Months Ended
	Jan. 31, 2020USD ($)
Covenant not to sue [Abstract]
Covenant Not to Sue Agreement, Amount	$ 50
Covenant Not to Sue Agreement, Extension Term	7 years
Covenant Not to Sue Agreement, Amortization Period	7 years

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2020	Apr. 30, 2019	Feb. 24, 2020	Feb. 28, 2019
Class of Stock [Line Items]
Share repurchase, authorized amount					$ 1,000
Repurchase and retirement of common stock (in shares)		0.9
Repurchase and retirement of common stock	$ 1,000	$ 198.1	$ 330
Stock repurchase, remaining authorized repurchase amount	801.9	801.9
Accelerated share repurchases, up-front payment	$ (1,000)	$ (1,000)
Accelerated share repurchases, percentage of common stock acquired	80.00%
Accelerated share repurchases, common stock acquired (in shares)	4.2
Accelerated share repurchases, common stock acquired, value	$ 800
Accelerated Share Repurchase
Class of Stock [Line Items]
Share repurchase, authorized amount				$ 1,000

Equity Award Plans (Stock Optio

Equity Award Plans (Stock Option Activities) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Apr. 30, 2020	Jul. 31, 2019
Stock options
Stock Options and PSOs, Outstanding Roll Forward
Balance, beginning (in shares)	300,000
Exercised (in shares)	(100,000)
Forfeited (in shares)	0
Balance, ending (in shares)	200,000	300,000
Stock Options and PSOs, Outstanding, Weighted-Average Exercise Price Roll Forward
Balance, beginning (in usd per share)	$ 14.53
Exercised (in usd per share)	11.66
Forfeited (in usd per share)	0
Balance, ending (in usd per share)	$ 17.57	$ 14.53
Options, Additional Disclosures
Weighted-average remaining contractual life (in years)	1 year 8 months 12 days	2 years 2 months 12 days
Aggregate intrinsic value	$ 33.3	$ 81,400,000
Options exercisable (in shares)	200,000
Options exercisable, weighted-average exercise price (in usd per share)	$ 17.57
Options exercisable, weighted-average remaining contractual term (in years)	1 year 8 months 12 days
Options exercisable, aggregate intrinsic value	$ 33.3
PSOs
Stock Options and PSOs, Outstanding Roll Forward
Balance, beginning (in shares)	3,700,000
Exercised (in shares)	0
Forfeited (in shares)	(800,000)
Balance, ending (in shares)	2,900,000	3,700,000
Stock Options and PSOs, Outstanding, Weighted-Average Exercise Price Roll Forward
Balance, beginning (in usd per share)	$ 193.99
Exercised (in usd per share)	0
Forfeited (in usd per share)	193.51
Balance, ending (in usd per share)	$ 194.11	$ 193.99
Options, Additional Disclosures
Weighted-average remaining contractual life (in years)	5 years 6 months	6 years 2 months 12 days
Aggregate intrinsic value	$ 9,400,000	$ 120,100,000
Options exercisable (in shares)	2,900,000
Options exercisable, weighted-average exercise price (in usd per share)	$ 194.11
Options exercisable, weighted-average remaining contractual term (in years)	5 years 6 months
Options exercisable, aggregate intrinsic value	$ 9,400,000

Equity Award Plans (Restricted

Equity Award Plans (Restricted Stock Award (RSA) and Performance-Based Stock Award (PSA) Activities) (Details) shares in Millions	9 Months Ended
	Apr. 30, 2020$ / sharesshares
RSAs
RSAs and PSAs, Outstanding Roll Forward
Balance, beginning (in shares) | shares	0
Vested (in shares) | shares	0
Balance, ending (in shares) | shares	0
RSAs and PSAs, Outstanding, Weighted-Average Grant-Date Fair Value Per Share
Balance, beginning (in usd per share) | $ / shares	$ 148.54
Vested (in usd per share) | $ / shares	148.54
Balance, ending (in usd per share) | $ / shares	$ 148.54
PSAs
RSAs and PSAs, Outstanding Roll Forward
Balance, beginning (in shares) | shares	0.1
Vested (in shares) | shares	0
Balance, ending (in shares) | shares	0.1
RSAs and PSAs, Outstanding, Weighted-Average Grant-Date Fair Value Per Share
Balance, beginning (in usd per share) | $ / shares	$ 148.54
Vested (in usd per share) | $ / shares	148.54
Balance, ending (in usd per share) | $ / shares	$ 148.54

Equity Award Plans (Restricte_2

Equity Award Plans (Restricted Stock Unit (RSU) and Performance-Based Stock Unit (PSU) Activities) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Apr. 30, 2020	Jul. 31, 2019
RSUs
RSUs and PSUs, Outstanding Roll Forward
Balance, beginning (in shares)	6,900,000
Granted (in shares)	3,100,000
Vested (in shares)	(2,000,000)
Forfeited (in shares)	(900,000)
Balance, ending (in shares)	7,100,000	6,900,000
RSUs and PSUs, Outstanding, Weighted-Average Grant-Date Fair Value Per Share
Balance, beginning (in usd per share)	$ 188.16
Granted (in usd per share)	208.19
Vested (in usd per share)	178.93
Forfeited (in usd per share)	185.56
Balance, ending (in usd per share)	$ 199.76	$ 188.16
RSUs and PSUs, Additional Disclosures
Weighted-average remaining contractual term (in years)	1 year 6 months	1 year 6 months
Aggregate intrinsic value	$ 1,400.7	$ 1,554
PSUs
RSUs and PSUs, Outstanding Roll Forward
Balance, beginning (in shares)	300,000
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	(100,000)
Balance, ending (in shares)	200,000	300,000
RSUs and PSUs, Outstanding, Weighted-Average Grant-Date Fair Value Per Share
Balance, beginning (in usd per share)	$ 197.86
Granted (in usd per share)	0
Vested (in usd per share)	168.17
Forfeited (in usd per share)	181.48
Balance, ending (in usd per share)	$ 202.99	$ 197.86
RSUs and PSUs, Additional Disclosures
Weighted-average remaining contractual term (in years)	1 year 3 months 18 days	1 year 9 months 18 days
Aggregate intrinsic value	$ 42.1	$ 67

Equity Award Plans (Additional

Equity Award Plans (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	$ 0.3	$ 6
PSAs and PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Award vesting period		3 years
PSAs and PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Award vesting period		4 years

Equity Award Plans (Allocation

Equity Award Plans (Allocation of Share-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	$ 0.3		$ 6
Share-based compensation expense	166.1	$ 138.2	490.2	$ 431.7
Total compensation cost not yet recognized, unvested awards	1,600		$ 1,600
Compensation cost not yet recognized, period of recognition (in years)			2 years 7 months 6 days
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	67.7	45.1	$ 197.4	129.6
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	55.5	54.5	155	169.2
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	22.7	20.1	76	75.7
Product | Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	1.4	1.3	4.2	4.3
Subscription and support | Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 18.8	$ 17.2	$ 57.6	$ 52.9

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate (in percentage)	(10.30%)	4.30%	(13.50%)	(0.30%)
Business Acquisition
Effective income tax rate (in percentage)	(10.30%)	4.30%	(13.50%)	(0.30%)
RedLock, Inc.
Business Acquisition
Valuation allowance, increase (decrease), amount		$ 9.4
Demisto, Inc.
Business Acquisition
Valuation allowance, increase (decrease), amount		$ 4.9

Net Loss Per Share (Computation

Net Loss Per Share (Computation of Basic and Diluted Net Loss Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (74.8)	$ (20.2)	$ (208.1)	$ (61.1)
Weighted-average shares used to compute net loss per share, basic and diluted	96.7	94.4	97.2	94.1
Net loss per share, basic and diluted (in usd per share)	$ (0.77)	$ (0.21)	$ (2.14)	$ (0.65)

Net Loss Per Share (Schedule of

Net Loss Per Share (Schedule of Antidilutive Securities Excluded from Computation) (Details) - shares shares in Millions	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	23.4	30.8
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	6.4	7.8
Warrants related to the issuance of convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	6.4	11.6
RSUs and PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	7.3	7
Options to purchase common stock, including PSOs
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	3.1	4.2
RSAs and PSAs
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	0.1	0.1
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities (in shares)	0.1	0.1

Other Income, Net (Details)

Other Income, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Other Income and Expenses [Abstract]
Interest income	$ 8.3	$ 18.3	$ 38	$ 51.7
Foreign currency exchange gains (losses), net	0.2	(0.1)	(1.8)	(1.3)
Other	(0.4)	0	(1.1)	(3.2)
Total other income, net	$ 8.1	$ 18.2	$ 35.1	$ 47.2

Uncategorized Items - panw-2020

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (28,300,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (28,300,000)