F5 (FFIV) 10-K18 Nov 242024 FY Annual reportFinancial data

Company Profile

Cover Page

Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Sep. 30, 2024	Nov. 12, 2024	Mar. 31, 2024
Cover [Abstract]
Entity Central Index Key	0001048695
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	000-26041
Entity Registrant Name	F5, Inc.
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	91-1714307
Entity Address, Address Line One	801 5th Avenue
Entity Address, City or Town	Seattle
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98104
City Area Code	206
Local Phone Number	272-5555
Title of 12(b) Security	Common stock, no par value
Trading Symbol	FFIV
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 11,047,876,639
Entity Common Stock, Shares Outstanding		58,614,865
Documents Incorporated by Reference [Text Block]	Information required in response to Part III of this Form 10-K (Items 10, 11, 12, 13 and 14) is hereby incorporated by reference to the specified portions of the Registrant’s Definitive Proxy Statement for the Annual Shareholders Meeting for fiscal year 2024, which Definitive Proxy Statement shall be filed with the Securities and Exchange Commission pursuant to Regulation 14A within 120 days of the end of the fiscal year to which this Report relates
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--09-30
Amendment Flag	false

Auditor Information

Auditor Information	12 Months Ended
Auditor Information	Sep. 30, 2024
Cover [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Seattle, Washington
Auditor Firm ID	238

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
ASSETS
Cash and cash equivalents	$ 1,074,602	$ 797,163
Short-term investments	0	6,160
Accounts receivable, net of allowances of $4,585 and $3,561	389,024	454,832
Inventories	76,378	35,874
Other current assets	569,467	554,744
Total current assets	2,109,471	1,848,773
Property and equipment, net	150,943	170,422
Operating lease right-of-use assets	178,180	195,471
Long-term investments	8,580	5,068
Deferred tax assets	365,951	295,308
Goodwill	2,312,362	2,288,678
Other assets, net	487,517	444,613
Total assets	5,613,004	5,248,333
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	67,894	63,315
Accrued liabilities	300,076	282,890
Deferred revenue	1,121,683	1,126,576
Total current liabilities	1,489,653	1,472,781
Deferred tax liabilities	7,179	4,637
Deferred revenue, long-term	676,276	648,545
Operating lease liabilities, long-term	215,785	239,565
Other long-term liabilities	94,733	82,573
Total long-term liabilities	993,973	975,320
Commitments and contingencies (Note 12)
Shareholders’ equity
Preferred stock, no par value; 10,000 shares authorized, no shares issued and outstanding	0	0
Common stock, no par value; 200,000 shares authorized, 58,094 and 59,207 shares issued and outstanding	5,889	24,399
Accumulated other comprehensive loss	(20,912)	(23,221)
Retained earnings	3,144,401	2,799,054
Total shareholders’ equity	3,129,378	2,800,232
Total liabilities and shareholders’ equity	$ 5,613,004	$ 5,248,333

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 4,585	$ 3,561
Preferred stock, par value (USD per share)	$ 0	$ 0
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0	$ 0
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	58,094,000	59,207,000
Common stock, shares outstanding	58,094,000	59,207,000

Consolidated Income Statements

Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Net revenues
Net revenues	$ 2,816,120	$ 2,813,169	$ 2,695,845
Cost of net revenues
Cost of net revenues	557,647	593,308	539,627
Gross profit	2,258,473	2,219,861	2,156,218
Operating expenses
Sales and marketing	832,279	878,215	926,591
Research and development	490,120	540,285	543,368
General and administrative	268,828	263,405	274,558
Restructuring charges	8,655	65,388	7,909
Total	1,599,882	1,747,293	1,752,426
Income from operations	658,591	472,568	403,792
Other income (expense), net	36,874	13,420	(18,399)
Income before income taxes	695,465	485,988	385,393
Provision for income taxes	128,687	91,040	63,233
Net income	$ 566,778	$ 394,948	$ 322,160
Net income per share - basic (USD per share)	$ 9.65	$ 6.59	$ 5.34
Weighted average shares - basic (shares)	58,720	59,909	60,274
Net income per share - diluted (USD per share)	$ 9.55	$ 6.55	$ 5.27
Weighted average shares - diluted (shares)	59,359	60,270	61,097
Product [Member]
Net revenues
Net revenues	$ 1,272,795	$ 1,334,638	$ 1,317,117
Cost of net revenues
Cost of net revenues	336,237	375,192	319,713
Service [Member]
Net revenues
Net revenues	1,543,325	1,478,531	1,378,728
Cost of net revenues
Cost of net revenues	$ 221,410	$ 218,116	$ 219,914

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 566,778	$ 394,948	$ 322,160
Other comprehensive income (loss):
Foreign currency translation adjustment	2,227	1,477	(4,502)
Available-for-sale securities:
Unrealized gains (losses) on securities, net of taxes of $18, $286, and $(160) for the years ended September 30, 2024, 2023, and 2022, respectively	82	2,090	(1,449)
Reclassification adjustment for realized losses included in net income, net of taxes of $0, $78, and $48 for the years ended September 30, 2024, 2023, and 2022, respectively	0	(612)	(152)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	82	1,478	(1,601)
Total other comprehensive income (loss)	2,309	2,955	(6,103)
Comprehensive income	$ 569,087	$ 397,903	$ 316,057

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax	$ 18	$ 286	$ (160)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	$ 0	$ 78	$ 48

Consolidated Statement Of Share

Consolidated Statement Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Balance, shares at Sep. 30, 2021		60,652,000
Balance at Sep. 30, 2021	$ 2,360,213	$ 192,458	$ (20,073)	$ 2,187,828
Exercise of employee stock options, shares		143,000
Exercise of employee stock options	3,613	$ 3,613
Issuance of stock under employee stock purchase plan, shares		412,000
Issuance of stock under employee stock purchase plan	60,927	$ 60,927
Issuance of restricted stock, shares		1,368,000
Repurchase of common stock, shares		(2,611,000)
Repurchase of common stock	(500,023)	$ (394,141)		(105,882)
Taxes paid related to net share settlement of equity awards, shares		(104,000)
Taxes paid related to net share settlement of equity awards	(21,025)	$ (21,025)
Stock-based compensation	249,216	$ 249,216
Net income	322,160			322,160
Other comprehensive income (loss)	(6,103)		(6,103)
Balance, shares at Sep. 30, 2022		59,860,000
Balance at Sep. 30, 2022	2,468,978	$ 91,048	(26,176)	2,404,106
Exercise of employee stock options, shares		56,000
Exercise of employee stock options	1,491	$ 1,491
Issuance of stock under employee stock purchase plan, shares		501,000
Issuance of stock under employee stock purchase plan	58,468	$ 58,468
Issuance of restricted stock, shares		1,335,000
Repurchase of common stock, shares		(2,454,000)
Repurchase of common stock	(350,049)	$ (350,049)
Taxes paid related to net share settlement of equity awards, shares		(91,000)
Taxes paid related to net share settlement of equity awards	(13,209)	$ (13,209)
Stock-based compensation	236,650	$ 236,650
Net income	394,948			394,948
Other comprehensive income (loss)	$ 2,955		2,955
Balance, shares at Sep. 30, 2023	59,207,000	59,207,000
Balance at Sep. 30, 2023	$ 2,800,232	$ 24,399	(23,221)	2,799,054
Exercise of employee stock options, shares	49,782	50,000
Exercise of employee stock options	$ 1,475	$ 1,475
Issuance of stock under employee stock purchase plan, shares		437,000
Issuance of stock under employee stock purchase plan	53,604	$ 53,604
Issuance of restricted stock, shares		1,294,000
Repurchase of common stock, shares		(2,824,000)
Repurchase of common stock	(500,056)
Repurchase of common stock, including excise taxes	(502,605)	$ (281,174)		(221,431)
Taxes paid related to net share settlement of equity awards, shares		(70,000)
Taxes paid related to net share settlement of equity awards	(11,523)	$ (11,523)
Stock-based compensation	219,108	$ 219,108
Net income	566,778			566,778
Other comprehensive income (loss)	$ 2,309		2,309
Balance, shares at Sep. 30, 2024	58,094,000	58,094,000
Balance at Sep. 30, 2024	$ 3,129,378	$ 5,889	$ (20,912)	$ 3,144,401

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Operating activities
Net income	$ 566,778	$ 394,948	$ 322,160
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	219,108	236,650	249,216
Depreciation and amortization	106,991	112,702	115,609
Non-cash operating lease costs	33,041	38,528	38,735
Deferred income taxes	(68,523)	(108,521)	(40,244)
Impairment of assets	0	3,455	6,175
Other	(962)	1,372	1,267
Changes in operating assets and liabilities (excluding effects of the acquisition of businesses):
Accounts receivable	63,953	16,704	(130,605)
Inventories	(40,504)	32,491	(46,310)
Other current assets	(14,038)	(64,959)	(144,628)
Other assets	(91,964)	16,591	(87,008)
Accounts payable and accrued liabilities	40,368	(63,100)	19,163
Deferred revenue	22,838	81,741	191,147
Lease liabilities	(44,667)	(45,193)	(52,046)
Net cash provided by operating activities	792,419	653,409	442,631
Investing activities
Purchases of investments	(2,100)	(1,789)	(61,284)
Maturities of investments	6,237	111,330	260,357
Sales of investments	0	16,085	120,578
Acquisition of businesses, net of cash acquired	(32,939)	(35,049)	(67,911)
Purchases of property and equipment	(30,412)	(54,184)	(33,624)
Net cash (used in) provided by investing activities	(59,214)	36,393	218,116
Financing activities
Proceeds from the exercise of stock options and purchases of stock under employee stock purchase plan	55,079	59,959	64,540
Payments for repurchase of common stock, including excise taxes	(500,558)	(350,049)	(500,023)
Payments on term debt agreement	0	(350,000)	(20,000)
Taxes paid related to net share settlement of equity awards	(11,523)	(13,209)	(21,025)
Net cash used in financing activities	(457,002)	(653,299)	(476,508)
Net increase in cash, cash equivalents and restricted cash	276,203	36,503	184,239
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations	1,302	2,125	(6,365)
Cash, cash equivalents and restricted cash, beginning of year	800,835	762,207	584,333
Cash, cash equivalents and restricted cash, end of year	1,078,340	800,835	762,207
Supplemental disclosures of cash flow information
Cash paid for taxes, net of refunds	181,635	191,569	110,036
Cash paid for amounts included in the measurement of operating lease liabilities	53,346	52,893	58,592
Cash paid for interest on long-term debt	0	2,970	7,981
Supplemental disclosures of non-cash activities
Right-of-use assets obtained in exchange for lease obligations	$ 12,927	$ 10,544	$ 20,778

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
Summary Of Significant Accounting Policies	Sep. 30, 2024
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Summary of Significant Accounting Policies The Company F5, Inc. (the "Company") is a leading provider of multicloud application security and delivery solutions which enable its customers to develop, deploy, operate, secure, and govern applications in any architecture, from on-premises to the public cloud. The Company's cloud, software, and hardware solutions enable its customers to deliver digital experiences to their customers faster, reliably, and at scale. The Company's enterprise-grade application services are available as cloud-based, software-as-a-service, and software-only solutions optimized for multicloud environments, with modules that can run independently, or as part of an integrated solution on its high-performance appliances. In connection with its solutions, the Company offers a broad range of professional services, including consulting, training, maintenance, and other technical support services. Accounting Principles The Company’s consolidated financial statements and accompanying notes are prepared on the accrual basis of accounting in accordance with generally accepted accounting principles in the United States of America ("GAAP"). Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates and Assumptions The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Examples of estimates and assumptions include: revenue recognition, identifying and evaluating the performance obligations of contracts, and the allocation of purchase consideration based on the relative fair value of standalone sales prices of these performance obligations; business combinations, including the determination of fair value for acquired developed technology assets and the evaluation and selection of significant assumptions such as revenue growth rate and technology migration curve; and the incremental borrowing rate for measuring lease obligations. Actual results may differ materially from management's estimates and assumptions. Cash, Cash Equivalents and Restricted Cash The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The Company invests its cash and cash equivalents in deposits with four major financial institutions, which, at times, exceed federally insured limits. The Company has not experienced any losses on its cash and cash equivalents. Amounts included in restricted cash represent those for which the Company's use is restricted by a contractual agreement. Investments The Company classifies its debt investments as available-for-sale. Debt investments, consisting of money market funds, corporate and municipal bonds and notes, the United States government and agency securities are reported at fair value with the related unrealized gains and losses included as a component of accumulated other comprehensive income (loss) in shareholders’ equity. Realized gains and losses, credit allowances and impairments due to credit losses are included in other income (expense) in the Company’s consolidated income statements. Debt investments with maturities of less than one year or where management’s intent is to use the investments to fund current operations are classified as short-term investments. Debt investments with maturities of greater than one year are classified as long-term investments. As an approximation to fair value, equity investments are measured using net asset value (“NAV”) and are classified as long-term investments. Unrealized and realized gains and losses are recorded in other income (expense) in the Company's consolidated income statements. Accounts Receivable Trade accounts receivable are recorded at the invoiced amount, net of allowances for credit losses for any potential uncollectible amounts. The allowance for credit losses is based on the assessment of the collectability of accounts. Management regularly reviews the adequacy of the allowance for credit losses on a collective basis by considering the age of each outstanding invoice, each customer’s expected ability to pay and collection history, current market conditions, and reasonable and supportable forecasts of future economic conditions to determine whether the allowance is appropriate. Accounts receivable deemed uncollectible are charged against the allowance for credit losses when identified. For fiscal years ended September 30, 2024 and 2023, the allowance for credit losses was not material. Unbilled Receivables Unbilled receivables represent amounts related to the Company's unconditional right to consideration associated with contracts with customers that have not yet been billed. Unbilled receivables are converted to accounts receivable at the point in time when the Company has the contractual right to invoice its customers. As of September 30, 2024, unbilled receivables that are expected to be reclassified to accounts receivable within the next 12 months are included in other current assets, with those expected to be transferred to accounts receivables in more than 12 months included in other assets. Concentration of Credit Risk The Company extends credit to customers and is therefore subject to credit risk. The Company performs initial and ongoing credit evaluations of its customers’ financial condition and does not require collateral. An allowance for credit losses is recorded for any potential uncollectible amount. Estimates are used in determining the allowance for credit losses in accordance with the Accounts Receivable policy. See Note 15 - Segment Information, for disaggregated accounts receivable by significant customer. The Company maintains its cash and investment balances with high credit quality financial institutions. Fair Value of Financial Instruments Short-term and long-term investments are recorded at fair value as the underlying securities are classified as available-for-sale with any unrealized gains or losses being recorded to other comprehensive income (loss). The fair value for securities held is determined using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Inventories The Company outsources the manufacturing of its pre-configured hardware platforms to contract manufacturers, who assemble each product to the Company’s specifications. As protection against component shortages and to provide replacement parts for its service teams, the Company also stocks limited supplies of certain key product components. The Company reduces inventory to net realizable value based on excess and obsolete inventories determined primarily by historical usage and forecasted demand. Inventories consist of hardware and related component parts and are recorded at the lower of cost and net realizable value (as determined by the first-in, first-out method). Property and Equipment Property and equipment are stated at net book value. Depreciation of property and equipment is provided using the straight-line method over the estimated useful lives of the assets, ranging from two Business Combinations The Company’s business combinations are accounted for under the acquisition method. Management allocates the fair value of purchase consideration to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values at the acquisition date. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Such valuations require management to make significant estimates and assumptions, especially with respect to intangible assets. Goodwill Goodwill represents the excess purchase price over the estimated fair value of net assets acquired as of the acquisition date. The Company tests goodwill for impairment on an annual basis and between annual tests when impairment indicators are identified, and goodwill is written down when impaired. For its annual goodwill impairment test in all periods to date, the Company has operated under one reporting unit and the fair value of its reporting unit has been determined by the Company’s enterprise value. The Company performs its annual goodwill impairment test during the second fiscal quarter. For its annual impairment test performed in the second quarter of fiscal 2024, the Company completed a quantitative assessment and determined that there was no impairment of goodwill. The Company also considered potential impairment indicators of goodwill at September 30, 2024 and noted no indicators of impairment. Intangible Assets Intangible assets with finite lives consist of acquired developed technology, customer relationships, patents and trademarks, trade names, and non-compete covenants acquired through business combinations or asset acquisitions. Intangible assets acquired through business combinations are recorded at their respective estimated fair values upon acquisition close. Other intangible assets acquired through asset acquisitions are recorded at their respective cost. The Company determines the estimated useful lives for acquired intangible assets based on the expected future cash flows associated with the respective asset. The Company's intangible assets with finite lives are amortized using the straight-line method over their estimated useful lives, ranging from four Software Development Costs The authoritative guidance requires certain internal software development costs related to software to be sold to be capitalized upon the establishment of technological feasibility. Capitalized software development costs are amortized over the remaining estimated economic life of the product. The Company's software development costs incurred subsequent to achieving technological feasibility have not been significant and, as a result, all software development costs have been expensed as research and development activities as incurred. Internal-Use Software The Company capitalizes costs incurred during the application development stage associated with the development of internal-use software systems. The capitalized costs are then amortized over the estimated useful life of the software, which is generally three Impairment of Long-Lived Assets The Company assesses the impairment of long-lived assets whenever events or changes in business circumstances indicate that the carrying amount of an asset may not be recoverable. When such events occur, management determines whether there has been impairment by comparing the anticipated undiscounted net future cash flows to the related asset’s carrying value. If impairment exists, the asset is written down to its estimated fair value. Revenue Recognition The Company sells products through distributors, resellers, and directly to end users. Revenue related to the Company's contracts with customers is recognized by following a five-step process: • Identify the contract(s) with a customer. Evidence of a contract generally consists of a purchase order issued pursuant to the terms and conditions of a distributor, reseller or end user agreement. • Identify the performance obligations in the contract. Performance obligations are identified in the Company's contracts and may include hardware, hardware-based software, software-only solutions, cloud-based subscription services as well as a broad range of service performance obligations including consulting, training, installation and maintenance. • Determine the transaction price. The purchase price stated in an agreed upon purchase order is generally representative of the transaction price. The Company offers several programs in which customers are eligible for certain levels of rebates if certain conditions are met. When determining the transaction price, the Company considers the effects of any variable consideration. • Allocate the transaction price to the performance obligations in the contract. The transaction price in a contract is allocated based upon the relative standalone selling price of each distinct performance obligation identified in the contract. • Recognize revenue when (or as) the entity satisfies a performance obligation. The Company satisfies performance obligations either over time or at a point in time as discussed in further detail below. Revenue is recognized at the time the related performance obligation is satisfied by transferring control of promised products and services to a customer. Revenue is recognized net of any taxes collected, which are subsequently remitted to governmental authorities. Shipping and handling fees charged to the Company’s customers are recognized as product revenue in the period shipped and the related costs for providing these services are recorded as a cost of product revenues. The following is a description of the principal activities from which the Company generates revenue: Product Revenue from the sale of the Company's hardware and perpetual software products is generally recognized at a point in time when the product has been fulfilled and the customer is obligated to pay for the product. The Company also offers several products by subscription, either through term-based license agreements or as SaaS offerings. Revenue for term-based license agreements is recognized at a point in time, when the Company delivers the software license to the customer and the subscription term has commenced. For the Company's SaaS offerings, revenue is recognized ratably as the services are provided. Hardware, including the software run on those devices is considered systems revenue. Perpetual or subscription software offerings that are, or have the ability to be deployed on a standalone basis, along with the Company's SaaS offerings are considered software revenue. When rights of return are present and the Company cannot estimate returns, revenue is recognized when such rights of return lapse. Payment terms to customers are generally net 30 days to net 60 days. Global Services Revenues for post-contract customer support ("PCS") are recognized on a straight-line basis over the service contract term. PCS includes a limited period of telephone support, updates, repair or replacement of any failed product or component that fails during the term of the agreement, bug fixes and rights to upgrades, when and if available. Consulting services are customarily billed at fixed hourly rates, plus out-of-pocket expenses, and revenues are recognized as the consulting is delivered. Similarly, training revenue is recognized as the training is completed. Flexible Consumption Program The Company enters into certain contracts with customers, including flexible consumption programs and multi-year subscriptions, with non-standard terms and conditions. Management assesses contractual terms in these agreements to identify and evaluate performance obligations. Management allocates consideration to each performance obligation based on relative fair value using standalone selling price and recognizes associated revenue as control is transferred to the customer. Contract Acquisition Costs Sales commissions earned by the Company's sales force are considered incremental and recoverable costs of obtaining a contract with a customer. Sales commissions on the initial PCS for hardware, perpetual software, and for term-based license subscription offerings are deferred and then amortized as an expense on a straight-line basis over the period of benefit. Sales commissions on SaaS subscription offerings are deferred and then amortized as an expense on a straight-line basis over the period of benefit. Management has determined the period of benefit to be 4.5 years for initial PCS on hardware and perpetual software offerings, and 3 to 5 years for subscription offerings. Guarantees and Product Warranties In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, resellers, lessors, and parties to other transactions with the Company, with respect to certain matters. The Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. The Company has entered into indemnification agreements with its officers and directors, and the Company’s bylaws contain similar indemnification obligations to the Company’s agents. It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. The Company offers warranties of one year for hardware for those customers without service contracts, with the option of purchasing additional warranty coverage in yearly increments. The Company accrues for warranty costs as part of its cost of sales based on associated material product costs and technical support labor costs. Warranty expense and accrued warranty costs were not material for all periods presented. Research and Development Research and development expenses consist of salaries and related benefits of product development personnel, prototype materials and expenses related to the development of new and improved products, and an allocation of facilities, depreciation and amortization expense. Research and development expenses are reflected in the income statements as incurred. Advertising Advertising costs are expensed as incurred. The Company incurred $5.4 million, $8.9 million and $15.4 million in advertising costs during the fiscal years 2024, 2023 and 2022, respectively. Income Taxes Deferred income tax assets and liabilities are determined based upon differences between the financial statement and income tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The realization of deferred tax assets is based on historical tax positions and estimates of future taxable income. A valuation allowance is recorded when it is more-likely-than-not that some of the deferred tax assets will not be realized. The Company assesses whether tax benefits claimed or expected to be claimed on a tax return should be recorded in the financial statements. The Company may recognize the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, including resolution of any related appeals or litigation processes, based on the technical merits of the position. The tax benefit to be recognized in the financial statements from such a position is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. The Company adjusts these liabilities based on a variety of factors, including the evaluation of information not previously available. These adjustments are reflected as increases or decreases to income tax expense in the period in which new information is available. Foreign Currency The functional currency for the Company’s foreign subsidiaries is either the U.S. dollar or the local currency depending on the assessment of management. An entity’s functional currency is determined by the currency of the economic environment in which the majority of cash is generated and expended by the entity. The financial statements of all majority-owned subsidiaries and related entities, with a functional currency other than the U.S. dollar, have been translated into U.S. dollars. All assets and liabilities of the respective entities are translated at year-end exchange rates and all revenues and expenses are translated at average rates during the respective period. Translation adjustments are reported as other comprehensive income (loss) in the consolidated statements of comprehensive income. Foreign currency transaction gains and losses are a result of the effect of exchange rate changes on transactions denominated in currencies other than the functional currency, including U.S. dollars. Gains and losses on those foreign currency transactions are included in determining net income or loss for the period of exchange and are recorded in other income, net. The net effect of foreign currency gains and losses was not material during the fiscal years ended September 30, 2024, 2023 and 2022. Segments Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision-maker, or decision-making group, in deciding how to allocate resources and in assessing performance. Management has determined that the Company is organized as, and operates in, one reportable operating segment. Stock-based Compensation The Company issues incentive awards to its employees through stock-based compensation consisting of restricted stock units ("RSUs"). RSUs are payable in shares of the Company’s common stock as the periodic vesting requirements are satisfied, generally over one The Company offers an Employee Stock Purchase Plan ("ESPP") that permits eligible employees to purchase shares of the Company’s common stock at a discount. In determining the fair value of shares issued under the ESPP, the Company uses the Black-Scholes option pricing model. The assumptions within the option pricing model are based on management’s best estimates at that time, which impact the fair value of the ESPP option calculated under the Black-Scholes methodology and, ultimately, the expense that will be recognized over the life of the ESPP option. The Company has also issued stock options as replacement awards, most notably for those assumed as part of business combinations. The Company used the Black-Scholes option pricing model to determine the fair value of the stock option replacement awards. The assumptions within the option pricing model are based on management’s best estimates at that time, which impact the fair value of the option calculated under the Black-Scholes methodology and, ultimately, the expense that will be recognized over the term of the option. The Company accounts for stock-based compensation using the straight-line attribution method for recognizing compensation expense. The Company recognizes compensation expense for only the portion of stock-based awards that are expected to vest. Therefore, the Company applies estimated forfeiture rates that are derived from historical employee termination behavior. Based on historical differences with forfeitures of stock-based awards granted to the Company’s executive officers and Board of Directors versus grants awarded to all other employees, the Company has developed separate forfeiture expectations for these two groups. The Company issues incentive awards to certain current executive officers as part of its annual equity awards program. A portion of the aggregate number of RSUs issued to executive officers vest in equal quarterly increments, and a portion is subject to the Company achieving specified performance goals. In fiscal 2018, the Company's Talent and Compensation Committee adopted a set of metrics for the performance stock awards, including (1) 50% of the annual performance stock grant is based on achieving certain annual revenue; (2) 25% of the annual performance stock grant is based on achieving an increase annual software revenue compared to the prior year; and (3) 25% of the annual performance stock grant is based on relative total shareholder return ("TSR") benchmarked to the S&P 500 index. In fiscal 2023, the Company's Talent and Compensation Committee amended the metrics for the performance stock awards to replace software revenue with earnings per share. In each case, no vesting or payment with respect to a performance goal shall occur unless a minimum threshold is met for the applicable goal. Vesting and payment with respect to the performance goal is linear above the threshold of the applicable goal and is capped at achievement of 200% above target. The Company recognizes compensation costs for awards with performance conditions and market conditions on a straight-line basis over the requisite service period for each separately vesting portion of the award and, for awards with performance conditions, when it concludes it is probable that the performance condition will be achieved. The Company reassesses the probability of vesting at each balance sheet date and adjusts compensation costs based on the probability assessment. Comprehensive Income Comprehensive income includes certain changes in equity that are excluded from net income, specifically, unrealized gains or losses on securities and foreign currency translation adjustments. These changes are included in accumulated other comprehensive income or loss. Recently Issued Accounting Pronouncements In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures ("ASU 2023-07"). This ASU expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 will be effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its disclosures in the consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures ("ASU 2023-09"). This ASU requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of the effective tax rate reconciliation, and modifies other income tax-related disclosures. ASU 2023-09 will be effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its disclosures in the consolidated financial statements. In November 2024, the FASB issued ASU No. 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses ("ASU 2024-03"). This ASU requires new financial statement disclosures disaggregating prescribed expense categories within relevant income statement expense captions. ASU 2024-03 will be effective for fiscal years beginning after December 15, 2026, and interim periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its disclosures in the consolidated financial statements.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
Revenue from Contracts with Customers	Sep. 30, 2024
Revenue from Contracts with Customers [Abstract]
Revenue from Contract with Customers	Revenue from Contracts with Customers Capitalized Contract Acquisition Costs The table below shows significant movements in capitalized contract acquisition costs (current and noncurrent) for the years ended September 30, 2024, 2023, and 2022 (in thousands): 2024 2023 2022 Balance, beginning of year $ 66,468 $ 77,220 $ 77,836 Additional capitalized contract acquisition costs 35,173 26,960 37,897 Amortization of capitalized contract acquisition costs (35,383) (37,712) (38,513) Balance, end of year $ 66,258 $ 66,468 $ 77,220 Amortization of capitalized contract acquisition costs was $35.4 million, $37.7 million, and $38.5 million for the years ended September 30, 2024, 2023, and 2022, respectively, and is recorded in Sales and Marketing expense in the accompanying consolidated income statements. There was no impairment of any capitalized contract acquisition costs during any period presented. Contract Balances Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to the Company's contracts with customers. Liabilities are recorded for amounts that are collected in advance of the satisfaction of performance obligations, or for contracts with customers that contain the Company's unconditional rights to consideration, for which the customer has not been billed. These liabilities are classified as current and non-current deferred revenue. The table below shows significant movements in the deferred revenue balances (current and noncurrent) for the years ended September 30, 2024, 2023, and 2022 (in thousands): 2024 2023 2022 Balance, beginning of year $ 1,775,121 $ 1,691,580 $ 1,489,842 Amounts added but not recognized as revenues 1,179,350 1,162,698 1,167,143 Deferred revenue acquired through acquisition of businesses — 1,800 10,591 Revenues recognized related to the opening balance of deferred revenue (1,156,512) (1,080,957) (975,996) Balance, end of year $ 1,797,959 $ 1,775,121 $ 1,691,580 Remaining Performance Obligations Remaining performance obligations represent the amount of the transaction price under contracts with customers that are attributable to performance obligations that are unsatisfied or partially satisfied at the reporting date. The composition of unsatisfied performance obligations consists mainly of deferred service revenue, and to a lesser extent, deferred product revenue, for which the Company has an obligation to perform, and has not yet recognized as revenue in the consolidated financial statements. As of September 30, 2024, the total non-cancelable remaining performance obligations under the Company's contracts with customers was $1.8 billion and the Company expects to recognize revenues on approximately 62.4% of these remaining performance obligations over the next 12 months, 23.2% in year two, and the remaining balance thereafter. See Note 15 - Segment Information, for disaggregated revenue by significant customer and geographic region, as well as disaggregated product revenue by systems and software.

Business Combinations

Business Combinations	12 Months Ended
Business Combinations	Sep. 30, 2024
Business Combinations [Abstract]
Business Combinations	Business Combinations Fiscal Year 2024 Acquisitions During the second quarter of fiscal 2024, the Company completed two acquisitions. The acquired assets and assumed liabilities of the acquisitions were not material and the Company recorded $23.6 million of goodwill as a result of the acquisitions. The acquisitions did not have a material impact to the Company's operating results.  Fiscal Year 2023 Acquisition In February 2023, the Company acquired Lilac Cloud, Inc. ("Lilac"), a provider of innovative application delivery services. The acquired assets and assumed liabilities of Lilac were not material. The Company recorded $29.4 million of goodwill as a result of the acquisition. The measurement period for the Lilac acquisition lapsed during the second quarter of fiscal 2024. The acquisition did not have a material impact to the Company's operating results. Fiscal Year 2022 Acquisition of Threat Stack, Inc. In October 2021, the Company acquired Threat Stack, Inc. ("Threat Stack"), a provider of cloud security and workload protection solutions. The addition of Threat Stack’s cloud security capabilities to F5’s application and API protection solutions enhances visibility across application infrastructure and workloads to deliver more actionable security insights for customers. Pursuant to the Threat Stack Merger Agreement, at the effective time of the Merger, the capital stock of Threat Stack and the vested outstanding and unexercised stock options in Threat Stack were cancelled and converted to the right to receive $68.9 million in cash, subject to certain adjustments and conditions set forth in the Threat Stack Merger Agreement. Transaction costs associated with the acquisition were not material. As a result of the acquisition, the Company acquired all the assets and assumed all the liabilities of Threat Stack. The goodwill related to the Threat Stack acquisition is comprised primarily of expected synergies from combining operations and the acquired intangible assets that do not qualify for separate recognition. Goodwill related to the Threat Stack acquisition was not deductible for tax purposes. The results of operations of Threat Stack have been included in the Company's consolidated financial statements from the date of acquisition.  The allocated purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values is presented in the following table (in thousands): Estimated Useful Life Assets acquired Deferred tax assets $ 14,041 Other net tangible assets acquired, at fair value 5,481 Cash, cash equivalents, and restricted cash 911 Identifiable intangible assets: Developed technology 11,400 5 years Customer relationships 4,400 5 years Goodwill 43,282 Total assets acquired $ 79,515 Liabilities assumed Deferred revenue $ (10,591) Total liabilities assumed $ (10,591) Net assets acquired $ 68,924 The measurement period for the Threat Stack acquisition lapsed during the first quarter of fiscal 2023. The Company recorded immaterial adjustments to consideration exchanged for the purchase of Threat Stack within the post-close measurement period. The developed technology intangible asset is amortized on a straight-line basis over its estimated useful life of five years and included in cost of net product revenues. The customer relationships intangible asset is amortized on a straight-line basis over its estimated useful life of five years and included in sales and marketing expenses. The weighted-average life of the amortizable intangible assets recognized from the Threat Stack acquisition was five years as of October 1, 2021, the date the transaction closed. The estimated useful lives for the acquired intangible assets were based on the expected future cash flows associated with the respective asset. The pro forma financial information, as well as the revenue and earnings generated by Threat Stack, were not material to the Company's operations for the periods presented.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
Fair Value Measurements	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements In accordance with the authoritative guidance on fair value measurements and disclosure under GAAP, the Company determines fair value using a fair value hierarchy that distinguishes between market participant assumptions developed based on market data obtained from sources independent of the reporting entity, and the reporting entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances and expands disclosure about fair value measurements. Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date, essentially the exit price. The levels of fair value hierarchy are: Level 1: Quoted prices in active markets for identical assets and liabilities at the measurement date that the Company has the ability to access. Level 2: Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Unobservable inputs for which there is little or no market data available. These inputs reflect management’s assumptions of what market participants would use in pricing the asset or liability. Level 1 investments are valued based on quoted market prices in active markets and include the Company’s cash equivalent investments. Level 2 investments, which include investments that are valued based on quoted prices in markets that are not active, broker or dealer quotations, actual trade data, benchmark yields or alternative pricing sources with reasonable levels of price transparency, include the Company’s certificates of deposit, corporate bonds and notes, municipal bonds and notes, U.S. government securities, U.S. government agency securities and international government securities. Fair values for the Company’s level 2 investments are based on similar assets without applying significant judgments. In addition, all of the Company’s level 2 investments have a sufficient level of trading volume to demonstrate that the fair values used are appropriate for these investments. A financial instrument’s level within the fair value hierarchy is based upon the lowest level of any input that is significant to the fair value measurement. However, the determination of what constitutes “observable” requires significant judgment by the Company. The Company considers observable data to be market data which is readily available, regularly distributed or updated, reliable and verifiable, not proprietary, and provided by independent sources that are actively involved in the relevant market. Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2024 and 2023, were as follows (in thousands): Gross Unrealized Classification on Balance Sheet As of September 30, 2024 Fair Value Level Cost or Amortized Cost Gains Losses Aggregate Cash and Cash Equivalents Short-Term Investments Long-Term Investments Changes in fair value recorded in other comprehensive income (loss) Money Market Funds Level 1 $ 437,273 $ — $ — $ 437,273 $ 437,273 $ — $ — Total debt investments $ 437,273 $ — $ — $ 437,273 $ 437,273 $ — $ — Changes in fair value recorded in other net income (expense) Equity investments * $ 8,580 $ — $ — $ 8,580 Total equity investments 8,580 — — 8,580 Total investments $ 445,853 $ 437,273 $ — $ 8,580 * The fair value of this equity investment is measured at net asset value (NAV) which approximates fair value and is not classified within the fair value hierarchy . Gross Unrealized Classification on Balance Sheet As of September 30, 2023 Fair Value Level Cost or Amortized Cost Gains Losses Aggregate Cash and Cash Equivalents Short-Term Investments Long-Term Investments Changes in fair value recorded in other comprehensive income (loss) Money Market Funds Level 1 $ 392,592 $ — $ — $ 392,592 $ 392,592 $ — $ — Corporate bonds and notes Level 2 4,412 — (88) 4,324 — 4,324 — Municipal bonds and notes Level 2 1,108 — (9) 1,099 — 1,099 — U.S. government agency securities Level 2 740 — (3) 737 — 737 — Total debt investments $ 398,852 $ — $ (100) $ 398,752 $ 392,592 $ 6,160 $ — Changes in fair value recorded in other net income (expense) Equity investments * $ 5,068 $ — $ — $ 5,068 Total equity investments 5,068 — — 5,068 Total investments $ 403,820 $ 392,592 $ 6,160 $ 5,068 * The fair value of this equity investment is measured at NAV which approximates fair value and is not classified within the fair value hierarchy . The Company uses the fair value hierarchy for financial assets and liabilities. The carrying amounts of other current financial assets and other current financial liabilities approximate fair value due to their short-term nature. Interest income from cash, cash equivalents, and investments was $35.1 million, $18.2 million and $1.7 million for the years ended September 30, 2024, 2023, and 2022, respectively. Interest income is included in other income (expense), net on the Company's consolidated income statements. Unrealized losses on investments held for a period greater than 12 months at September 30, 2024 and 2023 were not material. The Company invests in debt securities that are rated investment grade. The Company reviews the individual debt securities in its portfolio to determine whether a credit loss exists by comparing the extent to which the fair value is less than the amortized cost and considering any changes to ratings of a debt security by a ratings agency. The Company determined that as of September 30, 2024, there were no credit losses on any investments within its portfolio. Assets Measured and Recorded at Fair Value on a Non-Recurring Basis The Company’s non-financial long-lived assets, which include goodwill and other intangible assets, are not required to be carried at fair value on a recurring basis. These non-financial assets are measured at fair value on a non-recurring basis when there is an indicator of impairment, and they are recorded at fair value only when impairment is recognized. The Company reviews goodwill for impairment annually, during the second quarter of each fiscal year, or as circumstances indicate the possibility of impairment. The Company monitors the carrying value of tangible and intangible long-lived assets for impairment whenever events or changes in circumstances indicate its carrying amount may not be recoverable. During the year ended September 30, 2023, the Company recorded an impairment of $3.5 million against the operating lease right-of-use asset related to its third quarter of fiscal 2023 restructuring plan, see Note 13, Restructuring Charges. The charge was reflected in the Restructuring Charges line item on the Company's consolidated income statement. During the year ended September 30, 2022, as a result of a planned change in the use of the asset, the Company recorded an impairment of $ 6.2 million The Company did not recognize any other impairment charges related to non-financial long-lived assets for the years ended September 30, 2024, 2023, and 2022.

Balance Sheet Details

Balance Sheet Details	12 Months Ended
Balance Sheet Details	Sep. 30, 2024
Balance Sheet Details [Abstract]
Balance Sheet Details	Balance Sheet Details Cash, Cash Equivalents and Restricted Cash The following table provides a reconciliation of the Company’s cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash shown in the Company’s consolidated statements of cash flows for the periods presented (in thousands): September 30, 2024 2023 Cash and cash equivalents $ 1,074,602 $ 797,163 Restricted cash included in other assets, net 3,738 3,672 Total cash, cash equivalents and restricted cash $ 1,078,340 $ 800,835 Inventories Inventories consist of the following (in thousands): September 30, 2024 2023 Finished goods $ 27,922 $ 11,699 Raw materials 48,456 24,175 $ 76,378 $ 35,874 Other Current Assets Other current assets consist of the following (in thousands): September 30, 2024 2023 Unbilled receivables $ 401,104 $ 374,113 Prepaid expenses 93,467 84,506 Capitalized contract acquisition costs 32,681 31,206 Other 1 42,215 64,919 $ 569,467 $ 554,744 (1) As of September 30, 2023, includes a deposit of $36.2 million, used to support the working capital needs of the Company’s primary contract manufacturer's procurement of components used in the manufacturing of system hardware. As of September 30, 2024, the Company had no deposits with the Company's primary contract manufacturer. Property and Equipment Property and equipment consist of the following (in thousands): September 30, 2024 2023 Computer equipment $ 206,861 $ 189,555 Software 71,690 78,184 Office furniture and equipment 44,776 44,525 Leasehold improvements 186,179 185,225 509,506 497,489 Accumulated depreciation and amortization (358,563) (327,067) $ 150,943 $ 170,422 Depreciation and amortization expense totaled approximately $49.3 million, $53.3 million, and $56.0 million for the fiscal years ended September 30, 2024, 2023 and 2022, respectively. Goodwill Changes in the carrying amount of goodwill during fiscal years 2024 and 2023 are summarized as follows (in thousands): Balance, September 30, 2022 $ 2,259,282 Other business acquisitions 29,396 Balance, September 30, 2023 2,288,678 Other business acquisitions 23,684 Balance, September 30, 2024 $ 2,312,362 Other Assets Other assets consist of the following (in thousands): September 30, 2024 2023 Intangible assets $ 111,576 $ 150,969 Unbilled receivables 277,965 202,838 Capitalized contract acquisition costs 33,577 35,263 Other 64,399 55,543 $ 487,517 $ 444,613 Intangible assets are included in other assets on the consolidated balance sheets and consist of the following (in thousands): September 30, 2024 September 30, 2023 Gross Accumulated Net Carrying Gross Accumulated Net Carrying Developed technology $ 287,431 $ (192,967) $ 94,464 $ 319,368 $ (190,135) $ 129,233 Customer relationships 17,700 (10,034) 7,666 45,642 (33,298) 12,344 Patents and trademarks 9,795 (3,629) 6,166 13,699 (9,658) 4,041 Trade names 15,473 (12,193) 3,280 15,473 (10,122) 5,351 Non-compete covenants 1,960 (1,960) — 1,960 (1,960) — $ 332,359 $ (220,783) $ 111,576 $ 396,142 $ (245,173) $ 150,969 There were no intangible asset impairment charges for the years ended September 30,2024 and 2023. During the year ended September 30, 2022, as a result of a planned change in the use of the asset, the Company recorded an impairment of $ 6.2 million Amortization expense related to intangible assets was $24.4 million, $29.1 million, and $36.4 million for the fiscal years ended September 30, 2024, 2023 and 2022, respectively. For intangible assets held as of September 30, 2024, amortization expense for the five succeeding fiscal years is as follows (in thousands): 2025 $ 42,101 2026 37,346 2027 19,165 2028 6,729 2029 2,067 $ 107,408 Accrued Liabilities Accrued liabilities consist of the following (in thousands): September 30, 2024 2023 Payroll and benefits $ 171,571 $ 152,898 Operating lease liabilities, current 33,779 41,421 Income and other tax accruals 45,247 34,504 Other 49,479 54,067 $ 300,076 $ 282,890 Other Long-term Liabilities Other long-term liabilities consist of the following (in thousands): September 30, 2024 2023 Income taxes payable $ 85,461 $ 73,751 Other 9,272 8,822 $ 94,733 $ 82,573

Debt Facilities

Debt Facilities	12 Months Ended
Debt Facilities	Sep. 30, 2024
Debt Disclosure [Abstract]
Debt Facilities	Debt Facilities Term Credit Agreement In connection with the acquisition of Shape, on January 24, 2020, the Company entered into a Term Credit Agreement ("Term Credit Agreement") with certain institutional lenders that provides for a senior unsecured term loan facility in an aggregate principal amount of $400.0 million (the "Term Loan Facility"). The Term Loan Facility had an original maturity date of January 24, 2023 with quarterly installments equal to 1.25% of the original principal amount. Borrowings under the Term Loan Facility bore interest at a rate equal to LIBOR, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio. The proceeds from the Term Loan Facility were primarily used to finance the acquisition of Shape and related expenses. In connection with the Term Loan Facility, the Company incurred $2.2 million in debt issuance costs, which were recorded as a reduction to the carrying value of the principal amount of the debt. On December 15, 2022, the Company voluntarily prepaid, in full, all borrowings under the Term Loan Facility, including the outstanding principal balance of $350.0 million, and all accrued, but unpaid interest outstanding of $3.0 million. All remaining debt issuance costs were amortized to interest expense in connection with the prepayment. As a result of the payoff of its Term Loan Facility, the Company was released of any and all obligations, maintenance of covenants, and indebtedness under the Term Credit Agreement. The weighted average interest rate on the principal amount under the Term Loan Facility outstanding balance was 4.072% for the period of October 1, 2022 to December 15, 2022 and 2.190% for the fiscal year ended September 30, 2022. Revolving Credit Agreement On January 31, 2020, the Company entered into a Revolving Credit Agreement (the "Revolving Credit Agreement") that provides for a senior unsecured revolving credit facility in an aggregate principal amount of $350.0 million (the "Revolving Credit Facility"). The Company has the option to increase commitments under the Revolving Credit Facility from time to time, subject to certain conditions, by up to $150.0 million. Historically, borrowings under the Revolving Credit Facility bore interest at a rate equal to, at the Company's option, (a) LIBOR, adjusted for customary statutory reserves, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio, or (b) an alternate base rate determined in accordance with the Revolving Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on the Company's leverage ratio. On May 26, 2023, the Company amended the Revolving Credit Agreement as a result of the cessation of the LIBOR borrowing reference rate. The amendment modified and directly replaced the LIBOR borrowing reference rate within the Revolving Credit Agreement to the Secured Overnight Financing Rate ("SOFR"). After the amendment, borrowings under the Revolving Credit Facility bear interest at a rate equal to, at the Company's option, (a) SOFR plus 0.10%, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio, or (b) an alternate base rate determined in accordance with the Revolving Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on the Company's leverage ratio. The Revolving Credit Agreement also requires payment of a commitment fee calculated at a rate per annum of 0.125% to 0.300% depending on the Company's leverage ratio on the undrawn portion of the Revolving Credit Facility. Commitment fees incurred during fiscal years 2024, 2023 and 2022 were not material.

Leases

Leases	12 Months Ended
Leases	Sep. 30, 2024
Leases [Abstract]
Leases	Leases The majority of the Company's operating lease payments relate to its corporate headquarters in Seattle, Washington, which includes approximately 515,000 square feet of office space. The lease commenced in April 2019 and expires in 2033 with an option for renewal. The Company also leases additional office and lab space for product development and sales and support personnel in the United States and internationally. The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants. The components of the Company's operating lease expenses for the years ended September 30, 2024, 2023, and 2022 were as follows (in thousands): Fiscal year ended September 30, 2024 2023 2022 Operating lease expense $ 40,655 $ 47,036 $ 47,302 Short-term lease expense 2,791 2,986 2,465 Variable lease expense 23,268 23,139 23,209 Total lease expense $ 66,714 $ 73,161 $ 72,976 Variable lease expense primarily consists of common area maintenance, real estate taxes and parking expenses. Supplemental balance sheet information related to the Company's operating leases was as follows (in thousands, except lease term and discount rate): September 30, 2024 2023 Operating lease right-of-use assets, net $ 178,180 $ 195,471 Operating lease liabilities, current 1 33,779 41,421 Operating lease liabilities, long-term 215,785 239,565 Total operating lease liabilities $ 249,564 $ 280,986 Weighted average remaining lease term (in years) 7.9 8.6 Weighted average discount rate 2.94 % 2.77 % (1) Current portion of operating lease liabilities is included in accrued liabilities on the Company's consolidated balance sheets. As of September 30, 2024, the future operating lease payments for each of the next five years and thereafter is as follows (in thousands): Fiscal Years Ending September 30: Operating Lease 2025 $ 40,695 2026 37,677 2027 34,217 2028 29,621 2029 26,748 Thereafter 112,351 Total lease payments 281,309 Less: imputed interest (31,745) Total lease liabilities $ 249,564 Operating lease liabilities above do not include sublease income. As of September 30, 2024, the Company expects to receive sublease income of approximately $6.1 million, which consists of $4.4 million to be received in fiscal year 2025 and $1.7 million to be received in fiscal year 2026. During the year ended September 30, 2023, the Company recorded an impairment of $3.5 million against the operating lease right-of-use asset related to its third quarter of fiscal 2023 restructuring plan, see Note 13, Restructuring Charges. There were no impairments against right-of-use assets for the years ended September 30, 2024 and 2022. As of September 30, 2024, the Company had no significant operating leases that were executed but not yet commenced.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The United States and international components of income before income taxes are as follows (in thousands): Years Ended September 30, 2024 2023 2022 United States $ 430,532 $ 268,314 $ 217,323 International 264,933 217,674 168,070 $ 695,465 $ 485,988 $ 385,393 The provision for income taxes consists of the following (in thousands): Years Ended September 30, 2024 2023 2022 Current U.S. federal $ 99,745 $ 115,170 $ 35,259 State 17,957 18,359 14,592 Foreign 79,200 66,053 54,079 Total 196,902 199,582 103,930 Deferred U.S. federal (51,968) (89,280) (28,721) State (11,100) (18,576) (11,332) Foreign (5,147) (686) (644) Total (68,215) (108,542) (40,697) $ 128,687 $ 91,040 $ 63,233 The effective tax rate differs from the U.S. federal statutory rate as follows (in thousands): Years Ended September 30, 2024 2023 2022 Income tax provision at statutory rate $ 146,048 $ 102,058 $ 80,933 State taxes, net of federal benefit 10,548 6,806 6,012 Foreign-derived intangible income deduction (28,036) (30,086) (19,886) Tax impact of foreign earnings 7,359 9,856 (1,549) Research and development and other credits (14,748) (17,654) (19,763) Stock-based and other compensation 8,145 20,145 15,070 Other (629) (85) 2,416 $ 128,687 $ 91,040 $ 63,233 The Company does not maintain an indefinite reinvestment assertion on unremitted foreign earnings and has recorded a deferred tax liability for any estimated foreign, federal, or state tax liabilities associated with a future repatriation of foreign earnings. The Company benefits from tax incentive arrangements in certain foreign jurisdictions, which expire in fiscal years 2026 to 2034. The tax incentive agreements are conditional upon meeting certain operational, employment, and investment requirements. These arrangements decreased foreign taxes by $7.2 million, $6.0 million and $8.5 million, and increased diluted earnings per common share by $0.12, $0.10 and $0.14 for the years ended September 30, 2024, 2023 and 2022, respectively. The tax effects of the temporary differences that give rise to the deferred tax assets and liabilities are as follows (in thousands): Years Ended September 30, 2024 2023 Deferred tax assets Net operating loss carry-forwards $ 34,787 $ 40,201 Capitalized research and development costs 337,626 267,744 Accrued compensation and benefits 13,493 11,995 Stock-based compensation 8,606 8,875 Deferred revenue 39,042 42,544 Lease liabilities 53,945 62,405 Other accruals and reserves 28,729 22,723 Tax credit carryforwards 25,052 23,883 Depreciation 1,507 531 542,787 480,901 Valuation allowance (39,651) (43,942) 503,136 436,959 Deferred tax liabilities Purchased intangibles (53,047) (55,519) Depreciation (29,441) (28,113) Deferred costs (10,752) (11,031) Lease assets (36,610) (41,709) Other accruals and reserves (14,514) (9,916) (144,364) (146,288) Net deferred tax assets $ 358,772 $ 290,671 At September 30, 2024, the Company had foreign net operating loss carryforwards of approximately $54.9 million that can be carried forward indefinitely, and $0.2 million that will expire in fiscal year 2039. The Company had $69.5 million of federal net operating loss carryforwards, of which $53.3 million can be carried forward indefinitely and $16.2 million that will expire in fiscal years 2033 to 2038. The annual utilization of the federal net operating loss carryforwards is limited under Internal Revenue Code Section 382. The Company also had $199.3 million of state net operating loss carryforwards, of which $45.5 million can be carried forward indefinitely and $153.8 million will expire in fiscal years 2029 to 2043. In addition, there are $0.4 million of foreign credit carryforwards that can be carried forward indefinitely, $2.6 million of foreign credit carryforwards that will expire in fiscal years 2025 to 2039, $3.5 million of federal credit carryforwards that will expire in fiscal years 2033 to 2043, $33.9 million of state tax credit carryforwards that can be carried forward indefinitely, and $3.4 million of state tax credit carryforwards that will expire in fiscal years 2032 to 2039. Management believes that it is more likely than not that the benefit from certain foreign net operating loss and credit carryforwards and state tax net operating loss and credit carryforwards will not be realized. In recognition of this risk, the Company has provided a valuation allowance on the deferred tax assets relating to these carryforwards. The net change in the total valuation allowance was a decrease of $4.3 million and a decrease of $2.2 million for years ended September 30, 2024 and 2023, respectively. The Company recognizes the financial statement impact of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest impact that has a greater than fifty percent likelihood of being realized upon ultimate settlement with the relevant tax authority. The following table provides a reconciliation of the beginning and ending amount of unrecognized tax benefits in fiscal years 2024, 2023 and 2022 (in thousands): 2024 2023 2022 Balance, beginning of period $ 79,167 $ 66,840 $ 70,814 Gross increases related to prior period tax positions 7,939 4,270 4,816 Gross decreases related to prior period tax positions (7,659) (70) (10,538) Gross increases related to current period tax positions 8,494 9,224 10,203 Decreases relating to settlements with tax authorities (50) (300) — Reductions due to lapses of statute of limitations (1,014) (797) (8,455) Balance, end of period $ 86,877 $ 79,167 $ 66,840 The total amount of gross unrecognized tax benefits was $86.9 million, $79.2 million, and $66.8 million as of September 30, 2024, 2023, and 2022, respectively, of which, $56.2 million, $51.2 million, and $43.2 million, if recognized, would affect the effective tax rate. There is a reasonable possibility that the Company’s unrecognized tax benefits will change within twelve months due to audit settlements or the expiration of statute of limitations, but the Company does not expect the change to be material to the consolidated financial statements. The Company recognizes interest and, if applicable, penalties (not included in the “unrecognized tax benefits” table above) for any uncertain tax positions. Interest and penalties are recorded as a component of income tax expense. In the years ended September 30, 2024, 2023 and 2022, the Company recorded approximately a $5.6 million increase, $3.3 million increase and $1.5 million decrease, respectively, of interest and penalty expense related to uncertain tax positions. As of September 30, 2024 and 2023, the Company had a cumulative balance of accrued interest and penalties on unrecognized tax positions of $11.8 million and $6.2 million, respectively. The Company and its subsidiaries are subject to U.S. federal income tax as well as the income tax of multiple state and foreign jurisdictions. The Company has concluded all U.S. federal income tax matters for fiscal years through September 30, 2018. Major jurisdictions where there are wholly owned subsidiaries of F5, Inc. which require income tax filings include the United Kingdom, Singapore, Israel, and India. The earliest periods open for review by local taxing authorities are fiscal years 2022 for the United Kingdom, 2019 for Singapore, 2018 for Israel, and 2018 for India. The Company is currently under audit by the Internal Revenue Service for fiscal year 2019, by various states for fiscal years 2018 through 2022, and by various foreign jurisdictions including India for fiscal years 2018 to 2023, Israel for fiscal years 2018 to 2022, Saudi Arabia for fiscal years 2015 to 2020, and Singapore for fiscal years 2019 to 2022.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
Shareholders' Equity	Sep. 30, 2024
Equity [Abstract]
Stockholders' Equity	Shareholders' Equity Common Stock Repurchase On July 25, 2022, the Company announced that its Board of Directors authorized an additional $1.0 billion for its common stock share repurchase program. This authorization is incremental to the existing $5.4 billion program, initially approved in October 2010 and expanded in subsequent fiscal years. Acquisitions for the share repurchase programs will be made from time to time in private transactions, accelerated share repurchase programs, or open market purchases as permitted by securities laws and other legal requirements. The programs can be terminated at any time. The following table summarizes the Company's repurchases and retirements of its common stock under its Stock Repurchase Program (in thousands, except per share data): Years Ended September 30, 2024 2023 2022 Shares repurchased 2,824 2,454 2,611 Average price per share $ 177.08 $ 142.62 $ 191.47 Amount repurchased $ 500,056 $ 350,049 $ 500,023 As of September 30, 2024, the Company had $422.4 million remaining authorized to purchase shares under its share repurchase program.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
Stock-Based Compensation	Sep. 30, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Stock-Based Compensation	Stock-based Compensation The Company recognized $219.1 million, $236.7 million and $249.2 million of stock-based compensation expense for the fiscal years ended September 30, 2024, 2023 and 2022, respectively. The income tax benefit recognized on stock-based compensation within income tax expense was $44.4 million, $44.7 million and $47.3 million for the fiscal years ended September 30, 2024, 2023 and 2022, respectively. As of September 30, 2024, there was $171.2 million of total unrecognized stock-based compensation cost, the substantial majority of which will be recognized over approximately two years. Going forward, stock-based compensation expenses may increase as the Company issues additional equity-based awards to continue to attract and retain key employees. On October 31, 2024, the Company’s Board of Directors and Talent and Compensation Committee approved 748,580 RSUs to employees and executive officers pursuant to the Company’s annual equity awards program. Company has adopted a number of stock-based compensation plans as discussed below. 2011 Employee Stock Purchase Plan. In April 2012, the Board of Directors amended and restated the Company’s 1999 Employee Stock Purchase Plan, or the Employee Stock Purchase Plan. A total of 12,000,000 shares of common stock have been reserved for issuance under the Employee Stock Purchase Plan. The Employee Stock Purchase Plan permits eligible employees to acquire shares of the Company’s common stock through periodic payroll deductions of up to 15% of base compensation. No employee may purchase more than 10,000 shares during an offering period. In addition, no employee may purchase more than $25,000 worth of stock, determined by the fair market value of the shares at the time such option is granted, in one calendar year. The Employee Stock Purchase Plan has been implemented in a series of offering periods, each 6 months in duration. The price at which the common stock may be purchased is 85% of the lesser of the fair market value of the Company’s common stock on the first day of the applicable offering period or on the last day of the respective purchase period. As of September 30, 2024 there were 2,007,597 shares available for awards under the Employee Stock Purchase Plan. In determining the fair value of the right to purchase under the Employee Stock Purchase Plan, the Company uses the Black-Scholes option pricing model that employs the following key assumptions: Employee Stock Purchase Plan 2024 2023 2022 Risk-free interest rate 5.28% - 5.52% 3.18% - 4.90% 0.05% - 0.62% Expected dividend — — — Expected term 0.5 years 0.5 years 0.5 years Expected volatility 18.19% - 20.32% 33.02% - 38.15% 26.34% - 31.57% Acquisition Related Incentive Plans. In connection with the Company’s acquisitions, the Company has adopted acquisition equity incentive plans and assumed equity incentive plans of certain acquired companies and equity awards granted under such assumed equity incentive plans with awards under such plans being settled in shares of the Company’s common stock. All of these acquisition equity incentive plans and assumed equity incentive plans of acquired companies have been terminated and no additional equity awards will be issued under any of these plans. As of September 30, 2024, there were 19, 4,679, 2,351 and 20,601 stock units outstanding under the Nginx, Volterra, Threat Stack and Lilac Cloud acquisition plans, respectively. As of September 30, 2024, there were options to purchase 3,374, 31,363, 18,406 and 947 shares outstanding under the Nginx, Shape, Volterra and Lilac Cloud assumed plans, respectively, and 1,059 stock units outstanding under the Volterra assumed plan. F5, Inc. Incentive Plan. In March 2022, the Company adopted the F5, Inc. Incentive Plan, or the Plan, which amended and restated the 2014 Incentive Plan. The Plan provides for discretionary grants of stock options, stock units and other equity and cash-based awards for employees, including officers, directors and consultants. A total of 27,880,000 shares of common stock have been reserved for issuance under the Plan. Upon certain changes in control of the Company, all outstanding and unvested options or stock awards under the Plan will vest at the rate of 50%, unless assumed or substituted by the acquiring entity. During the fiscal year 2024, the Company issued no stock options, 122,841 performance stock units and 1,459,527 restricted stock units under the Plan. As of September 30, 2024, there were no options outstanding, 213,776 performance stock units outstanding, 1,312,328 restricted stock units outstanding and 3,952,900 shares available for new awards under the Plan. A summary of restricted stock unit activity under the Plan is as follows: Performance Stock Units Restricted Stock Units Outstanding Weighted Outstanding Weighted Balance, September 30, 2023 199,918 $ 159.37 1,225,386 $ 156.89 Units granted 122,841 152.14 1,459,527 156.32 Units vested (90,274) 153.03 (1,143,299) 177.69 Units cancelled (18,709) 178.05 (229,286) 155.22 Balance, September 30, 2024 213,776 $ 155.63 1,312,328 $ 158.22 A majority of the restricted stock units the Company grants to its employees vest quarterly over a two Expected Volatility Fair Value Expected Term Risk-Free Index Expected Grant Date per Share (in years) Interest Rate F5 Members Dividend November 1, 2023 Tranche 1 $ 192.58 0.91 5.32 % 22.60 % 27.66 % — Tranche 2 $ 203.37 1.91 4.93 % 31.25 % 32.35 % — Tranche 3 $ 210.37 2.91 4.72 % 29.55 % 30.88 % — As of September 30, 2024, the following annual equity grants for executive officers or a portion thereof are outstanding: Grant Date RSUs Granted Vesting Schedule Vesting Period Date Fully Vested November 1, 2023 206,560 Quarterly, Annually 1,2 3 years November 1, 2026 November 1, 2022 240,808 Quarterly, Annually 1,2 3 years November 1, 2025 November 1, 2021 160,384 Quarterly, Annually 1,2 3 years November 1, 2024 November 2, 2020 257,568 Quarterly, Annually 1 3 years November 1, 2023 (1) 50% of the annual equity grant vests in equal quarterly increments and 50% is subject to the Company achieving specified annual performance goals. (2) For the Company's Chief Executive Officer, 40% of the annual equity grant vests in equal quarterly increments and 60% is subject to the Company achieving specified annual performance goals. A summary of stock option activity under all of the Company’s plans is as follows: Options Outstanding Number of Weighted Balance, September 30, 2023 105,868 $ 35.31 Options granted — — Options exercised (49,782) 29.64 Options cancelled (1,996) 67.22 Balance, September 30, 2024 54,090 $ 39.36 There were no stock options granted in fiscal years 2024 and 2022. All stock options granted in fiscal year 2023 were replacement awards of those assumed as part of business acquisitions. The total intrinsic value of options exercised during fiscal 2024, 2023 and 2022 was $7.5 million, $6.9 million and $25.6 million, respectively. A summary of options outstanding that are exercisable and that have vested and are expected to vest as of September 30, 2024 is as follows: Number of Weighted Weighted Aggregate (In thousands) Stock options outstanding 54,090 4.56 $ 39.36 $ 9,782 Exercisable 53,648 4.55 $ 39.65 $ 9,686 Vested and expected to vest 54,072 4.56 $ 39.37 $ 9,778 (1) Aggregate intrinsic value represents the difference between the fair value of the Company’s common stock underlying these options at September 30, 2024 and the related exercise prices. As of September 30, 2024, equity based awards (including stock options and restricted stock units) are available for future issuance as follows: Awards Balance, September 30, 2023 5,296,803 Granted (1,582,368) Cancelled 282,731 Additional shares reserved (terminated), net (44,266) Balance, September 30, 2024 3,952,900

Net Income Per Share

Net Income Per Share	12 Months Ended
Net Income Per Share	Sep. 30, 2024
Net Income Per Share [Abstract]
Net Income Per Share	Net Income Per Share Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of common and dilutive common stock equivalent shares outstanding during the period. The Company’s nonvested restricted stock units do not have nonforfeitable rights to dividends or dividend equivalents and are not considered participating securities that should be included in the computation of earnings per share under the two-class method. The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data): Years Ended September 30, 2024 2023 2022 Numerator Net income $ 566,778 $ 394,948 $ 322,160 Denominator Weighted average shares outstanding — basic 58,720 59,909 60,274 Dilutive effect of common shares from stock options and restricted stock units 639 361 823 Weighted average shares outstanding — diluted 59,359 60,270 61,097 Basic net income per share $ 9.65 $ 6.59 $ 5.34 Diluted net income per share $ 9.55 $ 6.55 $ 5.27 Anti-dilutive stock-based awards excluded from the calculations of diluted earnings per share were not material for the years ended September 30, 2024, 2023 and 2022.

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
Commitments And Contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	Commitments and Contingencies Purchase Obligations In October 2022, the Company entered into an unconditional purchase commitment with one of its suppliers for the delivery of systems components. Under the terms of the agreement, the Company is obligated to purchase $10 million of component inventory annually, with a total committed amount of $40 million over a four Litigation Lynwood Investment CY Limited v. F5 Networks et al. On June 8, 2020, Lynwood Investment CY Limited (“Lynwood”) filed a lawsuit in the United States District Court for the Northern District of California against the Company and certain affiliates, along with other defendants. In its complaint, Lynwood claims to be the assignee of all rights and interests of Rambler Internet Holding LLC (“Rambler”), and alleges that the intellectual property in the NGINX software originally released by the co-founder of NGINX in 2004 belongs to Rambler (and therefore Lynwood, by assignment) because the software was created and developed while the co-founder was employed by Rambler. Lynwood asserted 26 causes of action against the various defendants, including copyright infringement, violation of trademark law, tortious interference, conspiracy, and fraud. The complaint sought damages, disgorgement of profits, declarations of copyright and trademark ownership, trademark cancellations, and injunctive relief. Lynwood also initiated several trademark opposition and cancellation proceedings before the Trademark Trial and Appeal Board of the United States Patent and Trademark Office, which have all since been suspended. In August and October 2020, the Company and the other defendants filed motions to dismiss Lynwood’s case. On March 25 and 30, 2021, the Court granted the Company’s and the other defendants’ motions to dismiss with leave to amend. Lynwood filed its amended complaint on April 29, 2021, seeking the same relief against the Company and other defendants. On May 27, 2021, the Company and other defendants filed a consolidated motion to dismiss. The Court granted the consolidated motion to dismiss without leave to amend on August 16, 2022 and entered final judgment against Lynwood on September 9, 2022. On September 14, 2022, Lynwood filed a notice of appeal to the Ninth Circuit Court of Appeals to appeal the dismissal. Lynwood filed its opening brief on December 16, 2022. The Company filed its opening appellate brief on April 10, 2023, and Lynwood filed its reply on May 31, 2023. Following the Court’s order granting the consolidated motion to dismiss and final judgment in the Company’s favor, the Court subsequently granted the Company attorneys' fees of over $0.8 million, which Lynwood appealed to the Ninth Circuit Court of Appeals. The dismissal appeal and the fees appeal were heard by the Ninth Circuit Court of Appeals on December 7, 2023. On November 7, 2024, the Court of Appeals partially affirmed the dismissal by affirming dismissal of the state law claims and remanding a portion of the copyright claim to the District Court. The Court of Appeals also vacated the fees award because of the remand. In addition to the above matters, the Company is subject to a variety of legal proceedings, claims, investigations, and litigation arising in the ordinary course of business, including intellectual property litigation. Management believes that the Company has meritorious defenses to the allegations made in its pending cases and intends to vigorously defend these lawsuits; however, the Company is unable to currently determine if an unfavorable outcome is probable or estimate any potential amount or range of possible loss of these or similar matters. There are many uncertainties associated with any litigation and these actions or other third-party claims against the Company may cause it to incur costly litigation and/or substantial settlement charges that could have a material adverse effect on the Company's business, financial condition, results of operations, and cash flows. The Company records an accrual for loss contingencies for legal proceedings when it believes that an unfavorable outcome is both (a) probable and (b) the amount or range of any possible loss is reasonably estimable. The Company has not recorded any accrual for loss contingencies associated with such legal proceedings or the investigations discussed above.

Restructuring Charges

Restructuring Charges	12 Months Ended
Restructuring Charges	Sep. 30, 2024
Restructuring and Related Activities [Abstract]
Restructuring Charges	Restructuring Charges In the first quarter of fiscal 2024, the Company initiated a restructuring plan to match strategic and financial objectives and optimize resources for long-term growth, including a reduction in force program. The Company recorded a restructuring charge of $9.8 million and did not record any significant subsequent charges related to the first quarter of fiscal 2024 restructuring plan. Remaining accrued expenses for the first quarter of fiscal 2024 restructuring plan were not material as of September 30, 2024. In the third quarter of fiscal 2023, the Company initiated a restructuring plan to better align strategic and financial objectives, optimize operations, and drive efficiencies for long-term growth and profitability, including a reduction in force affecting approximately 620 employees, or approximately 9% of the Company’s global workforce as of April 19, 2023. This included $53.2 million in severance benefits costs and related employer payroll taxes, and $3.5 million in charges related to the reduction of its leased facility space. The Company incurred $56.7 million in restructuring costs and did not record any significant subsequent charges related to the third quarter of fiscal 2023 restructuring plan. For the year ended September 30, 2023, cash paid for severance benefits costs and related employer payroll taxes was $49.7 million. Remaining accrued expenses for the third quarter of fiscal 2023 restructuring plan were not material as of September 30, 2024 and $3.5 million as of September 30, 2023. The Company did not record any significant subsequent charges related to the third quarter of fiscal 2023 restructuring plan. In the first quarters of fiscal 2023 and 2022, the Company initiated restructuring plans to match strategic and financial objectives and optimize resources for long term growth, including a reduction in force program. In the first quarter of fiscal 2023, the Company recorded a restructuring charge of $8.7 million. Remaining accrued expenses for the first quarter of fiscal 2023 restructuring plan were not material as of September 30, 2024 and 2023. The Company did not record any significant future charges related to the first quarter of fiscal 2023 restructuring plan. In the first quarter of fiscal 2022, the Company recorded a restructuring charge of $7.9 million. Remaining accrued expenses for the first quarter of fiscal 2022 restructuring plan were not material as of September 30, 2024 and 2023. The Company did not record any significant subsequent charges related to the first quarter of fiscal 2022 restructuring plan.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Sep. 30, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company has a 401(k) savings plan whereby eligible employees may voluntarily contribute a percentage of their compensation. The Company may, at its discretion, match a portion of the employees’ eligible contributions. Contributions by the Company to the plan during the years ended September 30, 2024, 2023, and 2022 were approximately $12.2 million, $13.7 million and $14.0 million, respectively. Contributions made by the Company vest over four years.

Segment Information

Segment Information	12 Months Ended
Segment Information	Sep. 30, 2024
Segment Reporting [Abstract]
Segment Reporting Disclosure	Segment Information Revenues by Geographic Location and Other Information The Company does business in three main geographic regions: the Americas (primarily the United States); Europe, the Middle East, and Africa ("EMEA"); and the Asia Pacific region ("APAC"). The Company’s chief operating decision-maker reviews financial information presented on a consolidated basis accompanied by information about net product revenues and revenues by geographic region. The Company’s foreign offices conduct sales, marketing, research and development, and support activities. Revenues are attributed by geographic location based on the location of the end-user customer. The following presents revenues by geographic region (in thousands): Years Ended September 30, 2024 2023 2022 Americas: United States $ 1,488,413 $ 1,487,416 $ 1,487,144 Other 92,859 96,958 85,711 Total Americas 1,581,272 1,584,374 1,572,855 EMEA 755,934 741,598 634,759 APAC 478,914 487,197 488,231 $ 2,816,120 $ 2,813,169 $ 2,695,845 The Company continues to offer its products through a range of consumption models, from physical systems to software solutions and managed services. The following presents net product revenues by systems and software (in thousands): Years Ended September 30, 2024 2023 2022 Net product revenues Systems revenue $ 537,318 $ 670,652 $ 651,902 Software revenue 735,477 663,986 665,215 Total net product revenue $ 1,272,795 $ 1,334,638 $ 1,317,117 The following customers accounted for more than 10% of total net revenue: Years Ended September 30, 2024 2023 2022 Ingram Micro, Inc. 16.3 % 15.6 % 20.0 % Synnex Corporation 15.9 % 15.0 % 13.4 % The following customers accounted for more than 10% of total receivables: September 30, 2024 2023 Ingram Micro, Inc. 20.3 % — Synnex Corporation 14.8 % 16.0 % Carahsoft Technology Corporation — 10.1 % The Company tracks assets by physical location. Long-lived assets consist of property and equipment, net, and are shown below (in thousands): September 30, 2024 2023 Americas: United States $ 112,420 $ 125,736 Other 1,773 2,592 Total Americas 114,193 128,328 EMEA 21,970 24,336 APAC 14,780 17,758 $ 150,943 $ 170,422

Subsequent Events

Subsequent Events	12 Months Ended
Subsequent Events	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Share Repurchase Activities On October 25, 2024 the Company's Board of Directors authorized an additional $1.0 billion for its common stock share repurchase program. This new authorization is incremental to the $422.4 million currently unused in the existing program, which was initially approved in October 2010 and expanded in subsequent fiscal years. Acquisitions for the share repurchase programs will be made from time to time in private transactions, accelerated share repurchase programs, or open market purchases as permitted by securities laws and other legal requirements. The timing and amounts of any purchases will be based on market conditions and other factors including but not limited to price, regulatory requirements and capital availability. The program does not require the purchase of any minimum number of shares and the program may be modified, suspended or discontinued at any time. Leased Properties On October 25, 2024, the Company renewed its operating lease for an existing office location in San Jose, California. The renewal commences in June 2025 and extends the lease term by 11 years. As a result of the lease renewal, the Company's total operating lease right-of-use assets and total operating lease liabilities increased by $22.8 million and $29.6 million, respectively.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income	$ 566,778	$ 394,948	$ 322,160

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements During the three months ended September 30, 2024, certain of our officers and directors adopted or terminated Rule 10b5-1 trading arrangements as follows: On September 5, 2024, Frank Pelzer, EVP, Chief Financial Officer, adopted a written plan intended to satisfy the affirmative defense of Rule 10b5-1(c) that is designed to be in effect until December 31, 2024 with respect to the sale of 16,493 Company shares. On September 5, 2024, Tom Fountain, EVP, Chief Operations Officer, adopted a written plan intended to satisfy the affirmative defense of Rule 10b5-1(c) that is designed to be in effect until November 17, 2025 with respect to the sale of 29,094 Company shares. On September 12, 2024, Kara Sprague, EVP, Chief Product Officer, adopted a written plan intended to satisfy the affirmative defense of Rule 10b5-1(c) that is designed to be in effect until February 3, 2025 with respect to the sale of 55,840 Company shares.
Rule 10b5-1 Arrangement Terminated	false
Frank Pelzer [Member]
Trading Arrangements, by Individual
Name	Frank Pelzer
Title	EVP, Chief Financial Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 5, 2024
Expiration Date	December 31, 2024
Aggregate Available	16,493
Tom Fountain [Member]
Trading Arrangements, by Individual
Name	Tom Fountain
Title	EVP, Chief Operations Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 5, 2024
Expiration Date	November 17, 2025
Aggregate Available	29,094
Kara Sprague [Member]
Trading Arrangements, by Individual
Name	Kara Sprague
Title	EVP, Chief Product Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 12, 2024
Expiration Date	February 3, 2025
Aggregate Available	55,840

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policy)	12 Months Ended
Summary Of Significant Accounting Policies (Policy)	Sep. 30, 2024
Accounting Policies [Abstract]
Accounting Principles	Accounting Principles The Company’s consolidated financial statements and accompanying notes are prepared on the accrual basis of accounting in accordance with generally accepted accounting principles in the United States of America ("GAAP").
Principles Of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Use Of Estimates and Assumptions	Use of Estimates and Assumptions The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Examples of estimates and assumptions include: revenue recognition, identifying and evaluating the performance obligations of contracts, and the allocation of purchase consideration based on the relative fair value of standalone sales prices of these performance obligations; business combinations, including the determination of fair value for acquired developed technology assets and the evaluation and selection of significant assumptions such as revenue growth rate and technology migration curve; and the incremental borrowing rate for measuring lease obligations. Actual results may differ materially from management's estimates and assumptions.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash
Investments	Investments The Company classifies its debt investments as available-for-sale. Debt investments, consisting of money market funds, corporate and municipal bonds and notes, the United States government and agency securities are reported at fair value with the related unrealized gains and losses included as a component of accumulated other comprehensive income (loss) in shareholders’ equity. Realized gains and losses, credit allowances and impairments due to credit losses are included in other income (expense) in the Company’s consolidated income statements. Debt investments with maturities of less than one year or where management’s intent is to use the investments to fund current operations are classified as short-term investments. Debt investments with maturities of greater than one year are classified as long-term investments. As an approximation to fair value, equity investments are measured using net asset value (“NAV”) and are classified as long-term investments. Unrealized and realized gains and losses are recorded in other income (expense) in the Company's consolidated income statements.
Accounts Receivable	Accounts Receivable Trade accounts receivable are recorded at the invoiced amount, net of allowances for credit losses for any potential uncollectible amounts. The allowance for credit losses is based on the assessment of the collectability of accounts. Management regularly reviews the adequacy of the allowance for credit losses on a collective basis by considering the age of each outstanding invoice, each customer’s expected ability to pay and collection history, current market conditions, and reasonable and supportable forecasts of future economic conditions to determine whether the allowance is appropriate. Accounts receivable deemed uncollectible are charged against the allowance for credit losses when identified. For fiscal years ended September 30, 2024 and 2023, the allowance for credit losses was not material.
Unbilled Receivables	Unbilled Receivables Unbilled receivables represent amounts related to the Company's unconditional right to consideration associated with contracts with customers that have not yet been billed. Unbilled receivables are converted to accounts receivable at the point in time when the Company has the contractual right to invoice its customers. As of September 30, 2024, unbilled receivables that are expected to be reclassified to accounts receivable within the next 12 months are included in other current assets, with those expected to be transferred to accounts receivables in more than 12 months included in other assets.
Concentration Of Credit Risk	Concentration of Credit Risk The Company extends credit to customers and is therefore subject to credit risk. The Company performs initial and ongoing credit evaluations of its customers’ financial condition and does not require collateral. An allowance for credit losses is recorded for any potential uncollectible amount. Estimates are used in determining the allowance for credit losses in accordance with the Accounts Receivable policy. See Note 15 - Segment Information, for disaggregated accounts receivable by significant customer. The Company maintains its cash and investment balances with high credit quality financial institutions.
Fair Value Of Financial Instruments	Fair Value of Financial Instruments Short-term and long-term investments are recorded at fair value as the underlying securities are classified as available-for-sale with any unrealized gains or losses being recorded to other comprehensive income (loss). The fair value for securities held is determined using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.
Inventories	Inventories The Company outsources the manufacturing of its pre-configured hardware platforms to contract manufacturers, who assemble each product to the Company’s specifications. As protection against component shortages and to provide replacement parts for its service teams, the Company also stocks limited supplies of certain key product components. The Company reduces inventory to net realizable value based on excess and obsolete inventories determined primarily by historical usage and forecasted demand. Inventories consist of hardware and related component parts and are recorded at the lower of cost and net realizable value (as determined by the first-in, first-out method).
Property, Plant and Equipment	Property and Equipment Property and equipment are stated at net book value. Depreciation of property and equipment is provided using the straight-line method over the estimated useful lives of the assets, ranging from two
Business Combinations	Business Combinations The Company’s business combinations are accounted for under the acquisition method. Management allocates the fair value of purchase consideration to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values at the acquisition date. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Such valuations require management to make significant estimates and assumptions, especially with respect to intangible assets.
Goodwill	Goodwill Goodwill represents the excess purchase price over the estimated fair value of net assets acquired as of the acquisition date. The Company tests goodwill for impairment on an annual basis and between annual tests when impairment indicators are identified, and goodwill is written down when impaired. For its annual goodwill impairment test in all periods to date, the Company has operated under one reporting unit and the fair value of its reporting unit has been determined by the Company’s enterprise value. The Company performs its annual goodwill impairment test during the second fiscal quarter. For its annual impairment test performed in the second quarter of fiscal 2024, the Company completed a quantitative assessment and determined that there was no impairment of goodwill. The Company also considered potential impairment indicators of goodwill at September 30, 2024 and noted no indicators of impairment.
Intangible Assets	Intangible Assets four
Software Development Costs	Software Development Costs The authoritative guidance requires certain internal software development costs related to software to be sold to be capitalized upon the establishment of technological feasibility. Capitalized software development costs are amortized over the remaining estimated economic life of the product. The Company's software development costs incurred subsequent to achieving technological feasibility have not been significant and, as a result, all software development costs have been expensed as research and development activities as incurred.
Internal-Use Software	Internal-Use Software The Company capitalizes costs incurred during the application development stage associated with the development of internal-use software systems. The capitalized costs are then amortized over the estimated useful life of the software, which is generally three
Impairment Of Long-Lived Assets	Impairment of Long-Lived Assets
Revenue Recognition	Revenue Recognition The Company sells products through distributors, resellers, and directly to end users. Revenue related to the Company's contracts with customers is recognized by following a five-step process: • Identify the contract(s) with a customer. Evidence of a contract generally consists of a purchase order issued pursuant to the terms and conditions of a distributor, reseller or end user agreement. • Identify the performance obligations in the contract. Performance obligations are identified in the Company's contracts and may include hardware, hardware-based software, software-only solutions, cloud-based subscription services as well as a broad range of service performance obligations including consulting, training, installation and maintenance. • Determine the transaction price. The purchase price stated in an agreed upon purchase order is generally representative of the transaction price. The Company offers several programs in which customers are eligible for certain levels of rebates if certain conditions are met. When determining the transaction price, the Company considers the effects of any variable consideration. • Allocate the transaction price to the performance obligations in the contract. The transaction price in a contract is allocated based upon the relative standalone selling price of each distinct performance obligation identified in the contract. • Recognize revenue when (or as) the entity satisfies a performance obligation. The Company satisfies performance obligations either over time or at a point in time as discussed in further detail below. Revenue is recognized at the time the related performance obligation is satisfied by transferring control of promised products and services to a customer. Revenue is recognized net of any taxes collected, which are subsequently remitted to governmental authorities. Shipping and handling fees charged to the Company’s customers are recognized as product revenue in the period shipped and the related costs for providing these services are recorded as a cost of product revenues. The following is a description of the principal activities from which the Company generates revenue: Product Revenue from the sale of the Company's hardware and perpetual software products is generally recognized at a point in time when the product has been fulfilled and the customer is obligated to pay for the product. The Company also offers several products by subscription, either through term-based license agreements or as SaaS offerings. Revenue for term-based license agreements is recognized at a point in time, when the Company delivers the software license to the customer and the subscription term has commenced. For the Company's SaaS offerings, revenue is recognized ratably as the services are provided. Hardware, including the software run on those devices is considered systems revenue. Perpetual or subscription software offerings that are, or have the ability to be deployed on a standalone basis, along with the Company's SaaS offerings are considered software revenue. When rights of return are present and the Company cannot estimate returns, revenue is recognized when such rights of return lapse. Payment terms to customers are generally net 30 days to net 60 days. Global Services Revenues for post-contract customer support ("PCS") are recognized on a straight-line basis over the service contract term. PCS includes a limited period of telephone support, updates, repair or replacement of any failed product or component that fails during the term of the agreement, bug fixes and rights to upgrades, when and if available. Consulting services are customarily billed at fixed hourly rates, plus out-of-pocket expenses, and revenues are recognized as the consulting is delivered. Similarly, training revenue is recognized as the training is completed. Flexible Consumption Program The Company enters into certain contracts with customers, including flexible consumption programs and multi-year subscriptions, with non-standard terms and conditions. Management assesses contractual terms in these agreements to identify and evaluate performance obligations. Management allocates consideration to each performance obligation based on relative fair value using standalone selling price and recognizes associated revenue as control is transferred to the customer. Contract Acquisition Costs Sales commissions earned by the Company's sales force are considered incremental and recoverable costs of obtaining a contract with a customer. Sales commissions on the initial PCS for hardware, perpetual software, and for term-based license subscription offerings are deferred and then amortized as an expense on a straight-line basis over the period of benefit. Sales commissions on SaaS subscription offerings are deferred and then amortized as an expense on a straight-line basis over the period of benefit. Management has determined the period of benefit to be 4.5 years for initial PCS on hardware and perpetual software offerings, and 3 to 5 years for subscription offerings.
Guarantees And Product Warranties	Guarantees and Product Warranties In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, resellers, lessors, and parties to other transactions with the Company, with respect to certain matters. The Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. The Company has entered into indemnification agreements with its officers and directors, and the Company’s bylaws contain similar indemnification obligations to the Company’s agents. It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. The Company offers warranties of one year for hardware for those customers without service contracts, with the option of purchasing additional warranty coverage in yearly increments. The Company accrues for warranty costs as part of its cost of sales based on associated material product costs and technical support labor costs. Warranty expense and accrued warranty costs were not material for all periods presented.
Research And Development	Research and Development Research and development expenses consist of salaries and related benefits of product development personnel, prototype materials and expenses related to the development of new and improved products, and an allocation of facilities, depreciation and amortization expense. Research and development expenses are reflected in the income statements as incurred.
Advertising	Advertising Advertising costs are expensed as incurred. The Company incurred $5.4 million, $8.9 million and $15.4 million in advertising costs during the fiscal years 2024, 2023 and 2022, respectively.
Income Taxes	Income Taxes Deferred income tax assets and liabilities are determined based upon differences between the financial statement and income tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The realization of deferred tax assets is based on historical tax positions and estimates of future taxable income. A valuation allowance is recorded when it is more-likely-than-not that some of the deferred tax assets will not be realized. The Company assesses whether tax benefits claimed or expected to be claimed on a tax return should be recorded in the financial statements. The Company may recognize the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, including resolution of any related appeals or litigation processes, based on the technical merits of the position. The tax benefit to be recognized in the financial statements from such a position is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. The Company adjusts these liabilities based on a variety of factors, including the evaluation of information not previously available. These adjustments are reflected as increases or decreases to income tax expense in the period in which new information is available.
Foreign Currency	Foreign Currency The functional currency for the Company’s foreign subsidiaries is either the U.S. dollar or the local currency depending on the assessment of management. An entity’s functional currency is determined by the currency of the economic environment in which the majority of cash is generated and expended by the entity. The financial statements of all majority-owned subsidiaries and related entities, with a functional currency other than the U.S. dollar, have been translated into U.S. dollars. All assets and liabilities of the respective entities are translated at year-end exchange rates and all revenues and expenses are translated at average rates during the respective period. Translation adjustments are reported as other comprehensive income (loss) in the consolidated statements of comprehensive income. Foreign currency transaction gains and losses are a result of the effect of exchange rate changes on transactions denominated in currencies other than the functional currency, including U.S. dollars. Gains and losses on those foreign currency transactions are included in determining net income or loss for the period of exchange and are recorded in other income, net. The net effect of foreign currency gains and losses was not material during the fiscal years ended September 30, 2024, 2023 and 2022.
Segments	Segments Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision-maker, or decision-making group, in deciding how to allocate resources and in assessing performance. Management has determined that the Company is organized as, and operates in, one reportable operating segment.
Stock-Based Compensation	Stock-based Compensation The Company issues incentive awards to its employees through stock-based compensation consisting of restricted stock units ("RSUs"). RSUs are payable in shares of the Company’s common stock as the periodic vesting requirements are satisfied, generally over one The Company offers an Employee Stock Purchase Plan ("ESPP") that permits eligible employees to purchase shares of the Company’s common stock at a discount. In determining the fair value of shares issued under the ESPP, the Company uses the Black-Scholes option pricing model. The assumptions within the option pricing model are based on management’s best estimates at that time, which impact the fair value of the ESPP option calculated under the Black-Scholes methodology and, ultimately, the expense that will be recognized over the life of the ESPP option. The Company has also issued stock options as replacement awards, most notably for those assumed as part of business combinations. The Company used the Black-Scholes option pricing model to determine the fair value of the stock option replacement awards. The assumptions within the option pricing model are based on management’s best estimates at that time, which impact the fair value of the option calculated under the Black-Scholes methodology and, ultimately, the expense that will be recognized over the term of the option. The Company accounts for stock-based compensation using the straight-line attribution method for recognizing compensation expense. The Company recognizes compensation expense for only the portion of stock-based awards that are expected to vest. Therefore, the Company applies estimated forfeiture rates that are derived from historical employee termination behavior. Based on historical differences with forfeitures of stock-based awards granted to the Company’s executive officers and Board of Directors versus grants awarded to all other employees, the Company has developed separate forfeiture expectations for these two groups. The Company issues incentive awards to certain current executive officers as part of its annual equity awards program. A portion of the aggregate number of RSUs issued to executive officers vest in equal quarterly increments, and a portion is subject to the Company achieving specified performance goals. In fiscal 2018, the Company's Talent and Compensation Committee adopted a set of metrics for the performance stock awards, including (1) 50% of the annual performance stock grant is based on achieving certain annual revenue; (2) 25% of the annual performance stock grant is based on achieving an increase annual software revenue compared to the prior year; and (3) 25% of the annual performance stock grant is based on relative total shareholder return ("TSR") benchmarked to the S&P 500 index. In fiscal 2023, the Company's Talent and Compensation Committee amended the metrics for the performance stock awards to replace software revenue with earnings per share. In each case, no vesting or payment with respect to a performance goal shall occur unless a minimum threshold is met for the applicable goal. Vesting and payment with respect to the performance goal is linear above the threshold of the applicable goal and is capped at achievement of 200% above target. The Company recognizes compensation costs for awards with performance conditions and market conditions on a straight-line basis over the requisite service period for each separately vesting portion of the award and, for awards with performance conditions, when it concludes it is probable that the performance condition will be achieved. The Company reassesses the probability of vesting at each balance sheet date and adjusts compensation costs based on the probability assessment.
Comprehensive Income	Comprehensive Income Comprehensive income includes certain changes in equity that are excluded from net income, specifically, unrealized gains or losses on securities and foreign currency translation adjustments. These changes are included in accumulated other comprehensive income or loss.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures ("ASU 2023-07"). This ASU expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 will be effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its disclosures in the consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures ("ASU 2023-09"). This ASU requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of the effective tax rate reconciliation, and modifies other income tax-related disclosures. ASU 2023-09 will be effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its disclosures in the consolidated financial statements. In November 2024, the FASB issued ASU No. 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses ("ASU 2024-03"). This ASU requires new financial statement disclosures disaggregating prescribed expense categories within relevant income statement expense captions. ASU 2024-03 will be effective for fiscal years beginning after December 15, 2026, and interim periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its disclosures in the consolidated financial statements.

Accounting Policies (Tables)

Accounting Policies (Tables)	12 Months Ended
Accounting Policies (Tables)	Sep. 30, 2024
Accounting Policies [Abstract]
Schedule of Inventories	Inventories consist of the following (in thousands): September 30, 2024 2023 Finished goods $ 27,922 $ 11,699 Raw materials 48,456 24,175 $ 76,378 $ 35,874
Property, Plant and Equipment	Property and equipment consist of the following (in thousands): September 30, 2024 2023 Computer equipment $ 206,861 $ 189,555 Software 71,690 78,184 Office furniture and equipment 44,776 44,525 Leasehold improvements 186,179 185,225 509,506 497,489 Accumulated depreciation and amortization (358,563) (327,067) $ 150,943 $ 170,422
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data): Years Ended September 30, 2024 2023 2022 Numerator Net income $ 566,778 $ 394,948 $ 322,160 Denominator Weighted average shares outstanding — basic 58,720 59,909 60,274 Dilutive effect of common shares from stock options and restricted stock units 639 361 823 Weighted average shares outstanding — diluted 59,359 60,270 61,097 Basic net income per share $ 9.65 $ 6.59 $ 5.34 Diluted net income per share $ 9.55 $ 6.55 $ 5.27

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
Revenue from Contracts with Customers (Tables)	Sep. 30, 2024
Revenue from Contracts with Customers [Abstract]
Capitalized Contract Cost	The table below shows significant movements in capitalized contract acquisition costs (current and noncurrent) for the years ended September 30, 2024, 2023, and 2022 (in thousands): 2024 2023 2022 Balance, beginning of year $ 66,468 $ 77,220 $ 77,836 Additional capitalized contract acquisition costs 35,173 26,960 37,897 Amortization of capitalized contract acquisition costs (35,383) (37,712) (38,513) Balance, end of year $ 66,258 $ 66,468 $ 77,220
Contract with Customer, Asset and Liability	The table below shows significant movements in the deferred revenue balances (current and noncurrent) for the years ended September 30, 2024, 2023, and 2022 (in thousands): 2024 2023 2022 Balance, beginning of year $ 1,775,121 $ 1,691,580 $ 1,489,842 Amounts added but not recognized as revenues 1,179,350 1,162,698 1,167,143 Deferred revenue acquired through acquisition of businesses — 1,800 10,591 Revenues recognized related to the opening balance of deferred revenue (1,156,512) (1,080,957) (975,996) Balance, end of year $ 1,797,959 $ 1,775,121 $ 1,691,580

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
Business Combinations (Tables)	Sep. 30, 2024
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The allocated purchase consideration to assets acquired and liabilities assumed based on preliminary estimated fair values is presented in the following table (in thousands): Estimated Useful Life Assets acquired Deferred tax assets $ 14,041 Other net tangible assets acquired, at fair value 5,481 Cash, cash equivalents, and restricted cash 911 Identifiable intangible assets: Developed technology 11,400 5 years Customer relationships 4,400 5 years Goodwill 43,282 Total assets acquired $ 79,515 Liabilities assumed Deferred revenue $ (10,591) Total liabilities assumed $ (10,591) Net assets acquired $ 68,924

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
Fair Value Measurements (Tables)	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule Of Financial Assets Measured At Fair Value on A Recurring Basis	The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2024 and 2023, were as follows (in thousands): Gross Unrealized Classification on Balance Sheet As of September 30, 2024 Fair Value Level Cost or Amortized Cost Gains Losses Aggregate Cash and Cash Equivalents Short-Term Investments Long-Term Investments Changes in fair value recorded in other comprehensive income (loss) Money Market Funds Level 1 $ 437,273 $ — $ — $ 437,273 $ 437,273 $ — $ — Total debt investments $ 437,273 $ — $ — $ 437,273 $ 437,273 $ — $ — Changes in fair value recorded in other net income (expense) Equity investments * $ 8,580 $ — $ — $ 8,580 Total equity investments 8,580 — — 8,580 Total investments $ 445,853 $ 437,273 $ — $ 8,580 * The fair value of this equity investment is measured at net asset value (NAV) which approximates fair value and is not classified within the fair value hierarchy . Gross Unrealized Classification on Balance Sheet As of September 30, 2023 Fair Value Level Cost or Amortized Cost Gains Losses Aggregate Cash and Cash Equivalents Short-Term Investments Long-Term Investments Changes in fair value recorded in other comprehensive income (loss) Money Market Funds Level 1 $ 392,592 $ — $ — $ 392,592 $ 392,592 $ — $ — Corporate bonds and notes Level 2 4,412 — (88) 4,324 — 4,324 — Municipal bonds and notes Level 2 1,108 — (9) 1,099 — 1,099 — U.S. government agency securities Level 2 740 — (3) 737 — 737 — Total debt investments $ 398,852 $ — $ (100) $ 398,752 $ 392,592 $ 6,160 $ — Changes in fair value recorded in other net income (expense) Equity investments * $ 5,068 $ — $ — $ 5,068 Total equity investments 5,068 — — 5,068 Total investments $ 403,820 $ 392,592 $ 6,160 $ 5,068 * The fair value of this equity investment is measured at NAV which approximates fair value and is not classified within the fair value hierarchy

Balance Sheet Details (Tables)

Balance Sheet Details (Tables)	12 Months Ended
Balance Sheet Details (Tables)	Sep. 30, 2024
Balance Sheet Details [Abstract]
Cash, Cash Equivalents and Restricted Cash	The following table provides a reconciliation of the Company’s cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash shown in the Company’s consolidated statements of cash flows for the periods presented (in thousands): September 30, 2024 2023 Cash and cash equivalents $ 1,074,602 $ 797,163 Restricted cash included in other assets, net 3,738 3,672 Total cash, cash equivalents and restricted cash $ 1,078,340 $ 800,835
Inventories	Inventories consist of the following (in thousands): September 30, 2024 2023 Finished goods $ 27,922 $ 11,699 Raw materials 48,456 24,175 $ 76,378 $ 35,874
Other Current Assets	Other current assets consist of the following (in thousands): September 30, 2024 2023 Unbilled receivables $ 401,104 $ 374,113 Prepaid expenses 93,467 84,506 Capitalized contract acquisition costs 32,681 31,206 Other 1 42,215 64,919 $ 569,467 $ 554,744 (1) As of September 30, 2023, includes a deposit of $36.2 million, used to support the working capital needs of the Company’s primary contract manufacturer's procurement of components used in the manufacturing of system hardware. As of September 30, 2024, the Company had no deposits with the Company's primary contract manufacturer.
Property, Plant and Equipment	Property and equipment consist of the following (in thousands): September 30, 2024 2023 Computer equipment $ 206,861 $ 189,555 Software 71,690 78,184 Office furniture and equipment 44,776 44,525 Leasehold improvements 186,179 185,225 509,506 497,489 Accumulated depreciation and amortization (358,563) (327,067) $ 150,943 $ 170,422
Goodwill	Changes in the carrying amount of goodwill during fiscal years 2024 and 2023 are summarized as follows (in thousands): Balance, September 30, 2022 $ 2,259,282 Other business acquisitions 29,396 Balance, September 30, 2023 2,288,678 Other business acquisitions 23,684 Balance, September 30, 2024 $ 2,312,362
Other Assets	Other assets consist of the following (in thousands): September 30, 2024 2023 Intangible assets $ 111,576 $ 150,969 Unbilled receivables 277,965 202,838 Capitalized contract acquisition costs 33,577 35,263 Other 64,399 55,543 $ 487,517 $ 444,613
Intangible Assets	Intangible assets are included in other assets on the consolidated balance sheets and consist of the following (in thousands): September 30, 2024 September 30, 2023 Gross Accumulated Net Carrying Gross Accumulated Net Carrying Developed technology $ 287,431 $ (192,967) $ 94,464 $ 319,368 $ (190,135) $ 129,233 Customer relationships 17,700 (10,034) 7,666 45,642 (33,298) 12,344 Patents and trademarks 9,795 (3,629) 6,166 13,699 (9,658) 4,041 Trade names 15,473 (12,193) 3,280 15,473 (10,122) 5,351 Non-compete covenants 1,960 (1,960) — 1,960 (1,960) — $ 332,359 $ (220,783) $ 111,576 $ 396,142 $ (245,173) $ 150,969
Estimated Amortization Expense For Intangible Assets	For intangible assets held as of September 30, 2024, amortization expense for the five succeeding fiscal years is as follows (in thousands): 2025 $ 42,101 2026 37,346 2027 19,165 2028 6,729 2029 2,067 $ 107,408
Accrued Liabilities	Accrued liabilities consist of the following (in thousands): September 30, 2024 2023 Payroll and benefits $ 171,571 $ 152,898 Operating lease liabilities, current 33,779 41,421 Income and other tax accruals 45,247 34,504 Other 49,479 54,067 $ 300,076 $ 282,890
Other Long-term Liabilities	Other long-term liabilities consist of the following (in thousands): September 30, 2024 2023 Income taxes payable $ 85,461 $ 73,751 Other 9,272 8,822 $ 94,733 $ 82,573

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Sep. 30, 2024
Leases [Abstract]
Lease, Cost	The components of the Company's operating lease expenses for the years ended September 30, 2024, 2023, and 2022 were as follows (in thousands): Fiscal year ended September 30, 2024 2023 2022 Operating lease expense $ 40,655 $ 47,036 $ 47,302 Short-term lease expense 2,791 2,986 2,465 Variable lease expense 23,268 23,139 23,209 Total lease expense $ 66,714 $ 73,161 $ 72,976
Assets And Liabilities Lessee	Supplemental balance sheet information related to the Company's operating leases was as follows (in thousands, except lease term and discount rate): September 30, 2024 2023 Operating lease right-of-use assets, net $ 178,180 $ 195,471 Operating lease liabilities, current 1 33,779 41,421 Operating lease liabilities, long-term 215,785 239,565 Total operating lease liabilities $ 249,564 $ 280,986 Weighted average remaining lease term (in years) 7.9 8.6 Weighted average discount rate 2.94 % 2.77 % (1) Current portion of operating lease liabilities is included in accrued liabilities on the Company's consolidated balance sheets.
Lessee, Operating Lease, Liability, Maturity	As of September 30, 2024, the future operating lease payments for each of the next five years and thereafter is as follows (in thousands): Fiscal Years Ending September 30: Operating Lease 2025 $ 40,695 2026 37,677 2027 34,217 2028 29,621 2029 26,748 Thereafter 112,351 Total lease payments 281,309 Less: imputed interest (31,745) Total lease liabilities $ 249,564

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Components Of Income Before Income Taxes	The United States and international components of income before income taxes are as follows (in thousands): Years Ended September 30, 2024 2023 2022 United States $ 430,532 $ 268,314 $ 217,323 International 264,933 217,674 168,070 $ 695,465 $ 485,988 $ 385,393
Schedule Of Provision For Income Taxes (Benefit)	The provision for income taxes consists of the following (in thousands): Years Ended September 30, 2024 2023 2022 Current U.S. federal $ 99,745 $ 115,170 $ 35,259 State 17,957 18,359 14,592 Foreign 79,200 66,053 54,079 Total 196,902 199,582 103,930 Deferred U.S. federal (51,968) (89,280) (28,721) State (11,100) (18,576) (11,332) Foreign (5,147) (686) (644) Total (68,215) (108,542) (40,697) $ 128,687 $ 91,040 $ 63,233
Schedule Of Effective Tax Rate Differs From The U.S. Federal Statutory Rate	The effective tax rate differs from the U.S. federal statutory rate as follows (in thousands): Years Ended September 30, 2024 2023 2022 Income tax provision at statutory rate $ 146,048 $ 102,058 $ 80,933 State taxes, net of federal benefit 10,548 6,806 6,012 Foreign-derived intangible income deduction (28,036) (30,086) (19,886) Tax impact of foreign earnings 7,359 9,856 (1,549) Research and development and other credits (14,748) (17,654) (19,763) Stock-based and other compensation 8,145 20,145 15,070 Other (629) (85) 2,416 $ 128,687 $ 91,040 $ 63,233
Schedule Of Tax Effects To Deferred Tax Assets And Liabilities	The tax effects of the temporary differences that give rise to the deferred tax assets and liabilities are as follows (in thousands): Years Ended September 30, 2024 2023 Deferred tax assets Net operating loss carry-forwards $ 34,787 $ 40,201 Capitalized research and development costs 337,626 267,744 Accrued compensation and benefits 13,493 11,995 Stock-based compensation 8,606 8,875 Deferred revenue 39,042 42,544 Lease liabilities 53,945 62,405 Other accruals and reserves 28,729 22,723 Tax credit carryforwards 25,052 23,883 Depreciation 1,507 531 542,787 480,901 Valuation allowance (39,651) (43,942) 503,136 436,959 Deferred tax liabilities Purchased intangibles (53,047) (55,519) Depreciation (29,441) (28,113) Deferred costs (10,752) (11,031) Lease assets (36,610) (41,709) Other accruals and reserves (14,514) (9,916) (144,364) (146,288) Net deferred tax assets $ 358,772 $ 290,671
Schedule of Unrecognized Tax Benefits Roll Forward	The following table provides a reconciliation of the beginning and ending amount of unrecognized tax benefits in fiscal years 2024, 2023 and 2022 (in thousands): 2024 2023 2022 Balance, beginning of period $ 79,167 $ 66,840 $ 70,814 Gross increases related to prior period tax positions 7,939 4,270 4,816 Gross decreases related to prior period tax positions (7,659) (70) (10,538) Gross increases related to current period tax positions 8,494 9,224 10,203 Decreases relating to settlements with tax authorities (50) (300) — Reductions due to lapses of statute of limitations (1,014) (797) (8,455) Balance, end of period $ 86,877 $ 79,167 $ 66,840

Equity (Tables)

Equity (Tables)	12 Months Ended
Equity (Tables)	Sep. 30, 2024
Equity [Abstract]
Common Stock Repurchased and Retired	The following table summarizes the Company's repurchases and retirements of its common stock under its Stock Repurchase Program (in thousands, except per share data): Years Ended September 30, 2024 2023 2022 Shares repurchased 2,824 2,454 2,611 Average price per share $ 177.08 $ 142.62 $ 191.47 Amount repurchased $ 500,056 $ 350,049 $ 500,023

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
Stock-Based Compensation (Tables)	Sep. 30, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Schedule Of Assumptions In Determining The Fair Value Of Shares Issued Under The Employee Stock Purchase Plan	In determining the fair value of the right to purchase under the Employee Stock Purchase Plan, the Company uses the Black-Scholes option pricing model that employs the following key assumptions: Employee Stock Purchase Plan 2024 2023 2022 Risk-free interest rate 5.28% - 5.52% 3.18% - 4.90% 0.05% - 0.62% Expected dividend — — — Expected term 0.5 years 0.5 years 0.5 years Expected volatility 18.19% - 20.32% 33.02% - 38.15% 26.34% - 31.57%
Schedule Of Summary Of Restricted Stock Unit Activity	A summary of restricted stock unit activity under the Plan is as follows: Performance Stock Units Restricted Stock Units Outstanding Weighted Outstanding Weighted Balance, September 30, 2023 199,918 $ 159.37 1,225,386 $ 156.89 Units granted 122,841 152.14 1,459,527 156.32 Units vested (90,274) 153.03 (1,143,299) 177.69 Units cancelled (18,709) 178.05 (229,286) 155.22 Balance, September 30, 2024 213,776 $ 155.63 1,312,328 $ 158.22
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	In determining the fair value of the portion of the performance awards based on Total Shareholder Return, the Company uses a Monte Carlo simulation model that employs the following key assumptions: Expected Volatility Fair Value Expected Term Risk-Free Index Expected Grant Date per Share (in years) Interest Rate F5 Members Dividend November 1, 2023 Tranche 1 $ 192.58 0.91 5.32 % 22.60 % 27.66 % — Tranche 2 $ 203.37 1.91 4.93 % 31.25 % 32.35 % — Tranche 3 $ 210.37 2.91 4.72 % 29.55 % 30.88 % —
Schedule of Nonvested Restricted Stock Units Activity	As of September 30, 2024, the following annual equity grants for executive officers or a portion thereof are outstanding: Grant Date RSUs Granted Vesting Schedule Vesting Period Date Fully Vested November 1, 2023 206,560 Quarterly, Annually 1,2 3 years November 1, 2026 November 1, 2022 240,808 Quarterly, Annually 1,2 3 years November 1, 2025 November 1, 2021 160,384 Quarterly, Annually 1,2 3 years November 1, 2024 November 2, 2020 257,568 Quarterly, Annually 1 3 years November 1, 2023 (1) 50% of the annual equity grant vests in equal quarterly increments and 50% is subject to the Company achieving specified annual performance goals. (2) For the Company's Chief Executive Officer, 40% of the annual equity grant vests in equal quarterly increments and 60% is subject to the Company achieving specified annual performance goals.
Schedule Of Stock Option Activity	A summary of stock option activity under all of the Company’s plans is as follows: Options Outstanding Number of Weighted Balance, September 30, 2023 105,868 $ 35.31 Options granted — — Options exercised (49,782) 29.64 Options cancelled (1,996) 67.22 Balance, September 30, 2024 54,090 $ 39.36
Schedule Of Outstanding Stock Options Currently Exercisable, Vested And Expected To Vest	A summary of options outstanding that are exercisable and that have vested and are expected to vest as of September 30, 2024 is as follows: Number of Weighted Weighted Aggregate (In thousands) Stock options outstanding 54,090 4.56 $ 39.36 $ 9,782 Exercisable 53,648 4.55 $ 39.65 $ 9,686 Vested and expected to vest 54,072 4.56 $ 39.37 $ 9,778 (1) Aggregate intrinsic value represents the difference between the fair value of the Company’s common stock underlying these options at September 30, 2024 and the related exercise prices.
Schedule Of Equity Based Awards (Including Stock Options And Restricted Stock Units)	As of September 30, 2024, equity based awards (including stock options and restricted stock units) are available for future issuance as follows: Awards Balance, September 30, 2023 5,296,803 Granted (1,582,368) Cancelled 282,731 Additional shares reserved (terminated), net (44,266) Balance, September 30, 2024 3,952,900

Net Income Per Share (Tables)

Net Income Per Share (Tables)	12 Months Ended
Net Income Per Share (Tables)	Sep. 30, 2024
Net Income Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data): Years Ended September 30, 2024 2023 2022 Numerator Net income $ 566,778 $ 394,948 $ 322,160 Denominator Weighted average shares outstanding — basic 58,720 59,909 60,274 Dilutive effect of common shares from stock options and restricted stock units 639 361 823 Weighted average shares outstanding — diluted 59,359 60,270 61,097 Basic net income per share $ 9.65 $ 6.59 $ 5.34 Diluted net income per share $ 9.55 $ 6.55 $ 5.27

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule Of Revenues By Geographic Region	The following presents revenues by geographic region (in thousands): Years Ended September 30, 2024 2023 2022 Americas: United States $ 1,488,413 $ 1,487,416 $ 1,487,144 Other 92,859 96,958 85,711 Total Americas 1,581,272 1,584,374 1,572,855 EMEA 755,934 741,598 634,759 APAC 478,914 487,197 488,231 $ 2,816,120 $ 2,813,169 $ 2,695,845
Schedule of Product Revenues by Systems and Software	The following presents net product revenues by systems and software (in thousands): Years Ended September 30, 2024 2023 2022 Net product revenues Systems revenue $ 537,318 $ 670,652 $ 651,902 Software revenue 735,477 663,986 665,215 Total net product revenue $ 1,272,795 $ 1,334,638 $ 1,317,117
Schedule of Revenue by Major Customers by Reporting Segments	The following customers accounted for more than 10% of total net revenue: Years Ended September 30, 2024 2023 2022 Ingram Micro, Inc. 16.3 % 15.6 % 20.0 % Synnex Corporation 15.9 % 15.0 % 13.4 %
Schedule of Receivables by Major Customers by Reporting Segments	The following customers accounted for more than 10% of total receivables: September 30, 2024 2023 Ingram Micro, Inc. 20.3 % — Synnex Corporation 14.8 % 16.0 % Carahsoft Technology Corporation — 10.1 %
Long-lived Assets by Geographic Areas [Table Text Block]	The Company tracks assets by physical location. Long-lived assets consist of property and equipment, net, and are shown below (in thousands): September 30, 2024 2023 Americas: United States $ 112,420 $ 125,736 Other 1,773 2,592 Total Americas 114,193 128,328 EMEA 21,970 24,336 APAC 14,780 17,758 $ 150,943 $ 170,422

Summary Of Significant Accoun_3

Summary Of Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Segment Reporting [Abstract]
Number of Reportable Segments \| segment	1
Advertising
Advertising Expense \| $	$ 5.4	$ 8.9	$ 15.4
Restricted Stock Units (RSUs) [Member]
Restricted Stock Award
Award vesting period	2 years	2 years	2 years
Restricted Stock Units (RSUs) [Member] \| Annual Equity Program [Member]
Restricted Stock Award
Percentage Of Annual Performance Stock Grant Based On Achieving Annual Revenue Goal	50%
Percentage Of Annual Performance Stock Grant Based On Achieving Earnings Per Share Goal	25%
Percentage Of Annual Performance Stock Grant Based On Achieving Relative Total Shareholder Return Benchmarked to the S&P 500 Index Goal	25%
Percentage Of Over-Achievement To Which Annual Performance Based Vesting Cannot Exceed	200%
Maintenance [Member]
Revenue Recognition
Capitalized Contract Cost, Amortization Period	4 years 6 months
Hardware [Member]
Guarantees and Product Warranties
Standard Product Warranty Description	one year
Minimum
Property, Plant and Equipment [Abstract]
Property and equipment, useful life	2 years
Segment Reporting [Abstract]
Finite-Lived Intangible Asset, Useful Life	4 years
Revenue Recognition
Revenue, Performance Obligation, Description of Payment Terms	30
Restricted Stock Award
Award vesting period	1 year
Minimum \| Subscription and Circulation [Member]
Revenue Recognition
Capitalized Contract Cost, Amortization Period	3 years
Minimum \| Software and Software Development Costs [Member]
Segment Reporting [Abstract]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum
Property, Plant and Equipment [Abstract]
Property and equipment, useful life	5 years
Segment Reporting [Abstract]
Finite-Lived Intangible Asset, Useful Life	15 years
Revenue Recognition
Revenue, Performance Obligation, Description of Payment Terms	60
Restricted Stock Award
Award vesting period	4 years
Maximum \| Subscription and Circulation [Member]
Revenue Recognition
Capitalized Contract Cost, Amortization Period	5 years
Maximum \| Software and Software Development Costs [Member]
Segment Reporting [Abstract]
Finite-Lived Intangible Asset, Useful Life	10 years

Summary Of Significant Accoun_4

Summary Of Significant Accounting Policies - Schedule Of Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Finished goods	$ 27,922	$ 11,699
Raw materials	48,456	24,175
Inventories, Total	$ 76,378	$ 35,874

Summary Of Significant Accoun_5

Summary Of Significant Accounting Policies - Property And Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Computer equipment	$ 206,861	$ 189,555
Capitalized Computer Software, Gross	71,690	78,184
Office furniture and equipment	44,776	44,525
Leasehold improvements	186,179	185,225
Property and equipment, gross	509,506	497,489
Accumulated depreciation and amortization	(358,563)	(327,067)
Property, Plant and Equipment, Net	$ 150,943	$ 170,422
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	2 years
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years

Summary Of Significant Accoun_6

Summary Of Significant Accounting Policies - Schedule Of Computation Of Basic And Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Accounting Policies [Abstract]
Net income	$ 566,778	$ 394,948	$ 322,160
Weighted average shares outstanding - basic	58,720	59,909	60,274
Dilutive effect of common shares from stock options and restricted stock units	639	361	823
Weighted average shares outstanding - diluted	59,359	60,270	61,097
Basic net income per share (USD per share)	$ 9.65	$ 6.59	$ 5.34
Diluted net income per share (USD per share)	$ 9.55	$ 6.55	$ 5.27

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Capitalized Contract Acquisition Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Capitalized Contract Acquisition Costs [Abstract]
Balance, beginning of year	$ 66,468	$ 77,220	$ 77,836
Additional capitalized contract acquisition costs	35,173	26,960	37,897
Amortization of capitalized contract acquisition costs	(35,383)	(37,712)	(38,513)
Balance, end of year	$ 66,258	$ 66,468	$ 77,220

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Change in Contract with Customer, Liability [Roll Forward]
Balance, beginning of year	$ 1,775,121	$ 1,691,580	$ 1,489,842
Amounts added but not recognized as revenues	1,179,350	1,162,698	1,167,143
Deferred revenue acquired through acquisition of businesses	0	1,800	10,591
Revenues recognized related to the opening balance of deferred revenue	(1,156,512)	(1,080,957)	(975,996)
Balance, end of year	$ 1,797,959	$ 1,775,121	$ 1,691,580

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Narrative (Details) - USD ($)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Capitalized Contract Cost, Amortization	$ 35,383,000	$ 37,712,000	$ 38,513,000
Capitalized Contract Cost, Impairment Loss	$ 0	$ 0	$ 0

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Remaining Performance Obligations. (Details) $ in Billions	Sep. 30, 2024 USD ($)
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 1.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Percentage	62.40%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Percentage	62.40%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Percentage	23.20%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Percentage	23.20%

Business Combinations - Purchas

Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Oct. 01, 2021	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Fair Value of intangible Assets Abstract [Abstract]
Goodwill		$ 2,312,362	$ 2,288,678	$ 2,259,282
Threat Stack, Inc.
Fair Value of intangible Assets Abstract [Abstract]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	$ 14,041
Other tangible assets acquired, at fair value	5,481
Cash, cash equivalents, and restricted cash	$ 911
Identifiable Intangible Assets Useful Life	5 years
Goodwill	$ 43,282
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total	79,515
Liabilities Assumed Abstract [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	(10,591)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(10,591)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total	68,924
Threat Stack, Inc. \| Developed Technology Rights
Fair Value of intangible Assets Abstract [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 11,400
Identifiable Intangible Assets Useful Life	5 years
Threat Stack, Inc. \| Customer Relationships
Fair Value of intangible Assets Abstract [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 4,400
Identifiable Intangible Assets Useful Life	5 years

Business Combinations - Narrati

Business Combinations - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2021	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Goodwill, Acquired During Period		$ 23,684	$ 29,396
Fiscal Year 2024 Acquisitions
Business Acquisition [Line Items]
Goodwill, Acquired During Period		$ 23,600
Lilac Cloud, Inc.
Business Acquisition [Line Items]
Goodwill, Acquired During Period			$ 29,400
Threat Stack, Inc.
Business Acquisition [Line Items]
Total Purchase Price	$ 68,900
Identifiable Intangible Assets Useful Life	5 years
Developed Technology Rights \| Threat Stack, Inc.
Business Acquisition [Line Items]
Identifiable Intangible Assets Useful Life	5 years
Customer Relationships \| Threat Stack, Inc.
Business Acquisition [Line Items]
Identifiable Intangible Assets Useful Life	5 years

Fair Value Assets - Measured on

Fair Value Assets - Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value	$ 437,273	$ 392,592
Debt Securities, Available-for-sale, Amortized Cost	437,273	398,852
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	0	(100)
Debt Securities, Available-for-Sale	437,273	398,752
Debt Securities, Available-for-sale, Current	0	6,160
Debt Securities, Available-for-sale, Noncurrent	0	0
Equity Securities, FV-NI	8,580	5,068
Equity Securities, FV-NI, Current	0	0
Equity Securities, FV-NI, Noncurrent	8,580	5,068
Investments, Fair Value Disclosure	445,853	403,820
Short-term investments	0	6,160
Long-term investments	8,580	5,068
Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value	437,273	392,592
Corporate Bonds And Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		4,412
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(88)
Municipal Bonds And Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		1,108
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(9)
US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		740
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(3)
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	8,580	5,068
Equity Securities, FV-NI, Current	0	0
Equity Securities, FV-NI, Noncurrent	8,580	5,068
Fair Value, Recurring [Member] \| Level 1 \| Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value	$ 437,273	392,592
Fair Value, Recurring [Member] \| Level 2 \| Corporate Bonds And Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value		0
Debt Securities, Available-for-Sale		4,324
Debt Securities, Available-for-sale, Current		4,324
Debt Securities, Available-for-sale, Noncurrent		0
Fair Value, Recurring [Member] \| Level 2 \| Municipal Bonds And Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value		0
Debt Securities, Available-for-Sale		1,099
Debt Securities, Available-for-sale, Current		1,099
Debt Securities, Available-for-sale, Noncurrent		0
Fair Value, Recurring [Member] \| Level 2 \| US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value		0
Debt Securities, Available-for-Sale		737
Debt Securities, Available-for-sale, Current		737
Debt Securities, Available-for-sale, Noncurrent		$ 0

Fair Value Measures and Disclos

Fair Value Measures and Disclosures Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Income, Other	$ 35.1	$ 18.2	$ 1.7

Fair Value Measurements - Impai

Fair Value Measurements - Impairment of Assets Measured at Fair Value on a Nonrecurring Basis Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating Lease, Impairment Loss	$ 3.5
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating Lease, Impairment Loss	$ 3.5
Impairment of Intangible Assets (Excluding Goodwill)		$ 6.2
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]		Sales and marketing

Balance Sheet Details - Cash, C

Balance Sheet Details - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Balance Sheet Details [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 1,074,602	$ 797,163
Restricted Cash	3,738	3,672
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,078,340	$ 800,835	$ 762,207	$ 584,333

Balance Sheet Details - Invento

Balance Sheet Details - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Finished goods	$ 27,922	$ 11,699
Raw materials	48,456	24,175
Inventory, Net	$ 76,378	$ 35,874

Balance Sheet Details - Other C

Balance Sheet Details - Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Unbilled receivables	$ 401,104	$ 374,113
Prepaid expenses	93,467	84,506
Capitalized contract acquisition costs	32,681	31,206
Other1	42,215	64,919
Other Assets, Current	569,467	554,744
(1) Deposit Assets	$ 0	$ 36,200

Balance Sheet Details - Propert

Balance Sheet Details - Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Machinery and Equipment, Gross	$ 206,861	$ 189,555
Capitalized Computer Software, Gross	71,690	78,184
Furniture and Fixtures, Gross	44,776	44,525
Leasehold Improvements, Gross	186,179	185,225
Property, Plant and Equipment, Gross	509,506	497,489
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(358,563)	(327,067)
Property, Plant and Equipment, Net	$ 150,943	$ 170,422

Balance Sheet Details - Goodwil

Balance Sheet Details - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Goodwill, Beginning Balance	$ 2,288,678	$ 2,259,282
Goodwill, Acquired During Period	23,684	29,396
Goodwill, Ending Balance	$ 2,312,362	$ 2,288,678

Balance Sheet Details - Other A

Balance Sheet Details - Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Intangible assets	$ 111,576	$ 150,969
Unbilled receivables	277,965	202,838
Capitalized contract acquisition costs	33,577	35,263
Other	64,399	55,543
Other Assets, Noncurrent	$ 487,517	$ 444,613

Balance Sheet Details - Intangi

Balance Sheet Details - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 332,359	$ 396,142
Accumulated Amortization	(220,783)	(245,173)
Net Carrying Amount	111,576	150,969
Developed Technology Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	287,431	319,368
Accumulated Amortization	(192,967)	(190,135)
Net Carrying Amount	94,464	129,233
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,700	45,642
Accumulated Amortization	(10,034)	(33,298)
Net Carrying Amount	7,666	12,344
Patents And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,795	13,699
Accumulated Amortization	(3,629)	(9,658)
Net Carrying Amount	6,166	4,041
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,473	15,473
Accumulated Amortization	(12,193)	(10,122)
Net Carrying Amount	3,280	5,351
Non-Compete Covenants [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,960	1,960
Accumulated Amortization	(1,960)	(1,960)
Net Carrying Amount	$ 0	$ 0

Balance Sheet Details - Estimat

Balance Sheet Details - Estimated Amortization Expense For Intangible Assets (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Balance Sheet Details [Abstract]
2025	$ 42,101
2026	37,346
2027	19,165
2028	6,729
2029	2,067
Total estimated amortization expense	$ 107,408

Balance Sheet Details - Accrued

Balance Sheet Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Payroll and benefits	$ 171,571	$ 152,898
Operating lease liabilities, current	$ 33,779	$ 41,421
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Income and other tax accruals	$ 45,247	$ 34,504
Other	49,479	54,067
Accrued liabilities	$ 300,076	$ 282,890

Balance Sheet Details - Other L

Balance Sheet Details - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Income taxes payable	$ 85,461	$ 73,751
Other	9,272	8,822
Other Liabilities, Noncurrent	$ 94,733	$ 82,573

Balance Sheet Details - Narrati

Balance Sheet Details - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 106,991	$ 112,702	$ 115,609
Amortization of Intangible Assets	24,400	29,100	36,400
Fair Value, Nonrecurring
Property, Plant and Equipment [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)			6,200
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 49,300	$ 53,300	$ 56,000

Debt Facilities - Narrative (De

Debt Facilities - Narrative (Details) $ in Thousands					2 Months Ended	12 Months Ended
Debt Facilities - Narrative (Details) $ in Thousands	May 26, 2023	Dec. 15, 2022 USD ($)	Jan. 31, 2020 USD ($)	Jan. 24, 2020 USD ($)	Dec. 15, 2022	Sep. 30, 2024 USD ($) extension	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Debt Instrument [Line Items]
Repayments of Long-Term Debt						$ 0	$ 350,000	$ 20,000
Term Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate Principal Amount				$ 400,000
Redemption Percentage				1.25%
Debt Issuance Costs				$ 2,200
Repayments of Long-Term Debt		$ 350,000
Interest Expense, Long-Term Debt		$ 3,000
Line of Credit Facility, Interest Rate During Period					4.072%
Interest Rate at Period End								2.19%
Term Loan Facility [Member] \| Minimum
Debt Instrument [Line Items]
Basis Spread on Variable Rate				1.125%
Term Loan Facility [Member] \| Maximum
Debt Instrument [Line Items]
Basis Spread on Variable Rate				1.75%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate Principal Amount			$ 350,000
Conditional Increase In Borrowing Capacity			$ 150,000
Number Of Extensions \| extension						2
Length Of Extension Period						1 year
Long-term Line of Credit						$ 0
Outstanding Line of Credit Balance						$ 350,000
Debt Instrument, Interest Rate, Basis for Effective Rate	0.10
Revolving Credit Facility [Member] \| Minimum
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.125%		1.125%
Commitment Fee Percentage			0.125%
Revolving Credit Facility [Member] \| Maximum
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.75%		1.75%
Commitment Fee Percentage			0.30%
Revolving Credit Facility [Member] \| Alternate Base Rate [Member] \| Minimum
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.125%		0.125%
Revolving Credit Facility [Member] \| Alternate Base Rate [Member] \| Maximum
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.75%		0.75%

Leases - Operating Lease Expens

Leases - Operating Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating lease expense	$ 40,655	$ 47,036	$ 47,302
Short-term lease expense	2,791	2,986	2,465
Variable lease expense	23,268	23,139	23,209
Total lease expense	$ 66,714	$ 73,161	$ 72,976

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating lease right-of-use assets	$ 178,180	$ 195,471
Operating lease liabilities, current1	33,779	41,421
Operating lease liabilities, long-term	215,785	239,565
Total lease liabilities	$ 249,564	$ 280,986
Weighted average remaining lease term (in years)	7 years 10 months 24 days	8 years 7 months 6 days
Weighted average discount rate	2.94%	2.77%

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
2025	$ 40,695
2026	37,677
2027	34,217
2028	29,621
2029	26,748
Thereafter	112,351
Total lease payments	281,309
Less: imputed interest	(31,745)
Total lease liabilities	$ 249,564	$ 280,986

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	12 Months Ended
Leases - Narrative (Details) $ in Millions	Sep. 30, 2024 USD ($) ft²	Sep. 30, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Sublease Income	$ 6.1
Lessor, Operating Lease, Payments to be Received, Next Twelve Months	4.4
Lessor, Operating Lease, Payments to be Received, Year Two	$ 1.7
Operating Lease, Impairment Loss		$ 3.5
Office Building [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Number of Square Feet \| ft²	515,000

Income Taxes - Components Of In

Income Taxes - Components Of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
United States	$ 430,532	$ 268,314	$ 217,323
International	264,933	217,674	168,070
Income before income taxes	$ 695,465	$ 485,988	$ 385,393

Income Taxes - Schedule Of Prov

Income Taxes - Schedule Of Provision For Income Taxes (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Current, U.S. federal	$ 99,745	$ 115,170	$ 35,259
Current, State	17,957	18,359	14,592
Current, Foreign	79,200	66,053	54,079
Total	196,902	199,582	103,930
Deferred, U.S. federal	(51,968)	(89,280)	(28,721)
Deferred, State	(11,100)	(18,576)	(11,332)
Deferred, Foreign	(5,147)	(686)	(644)
Total	(68,215)	(108,542)	(40,697)
Income taxes (benefit)	$ 128,687	$ 91,040	$ 63,233

Income Taxes - Schedule Of Effe

Income Taxes - Schedule Of Effective Tax Rate Differs From The U.S. Federal Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax provision at statutory rate	$ 146,048	$ 102,058	$ 80,933
State taxes, net of federal benefit	10,548	6,806	6,012
Effective Income Tax Rate Reconciliation, FDII, Amount	(28,036)	(30,086)	(19,886)
Tax impact of foreign earnings	7,359	9,856	(1,549)
Research and development and other credits	(14,748)	(17,654)	(19,763)
Stock-based and other compensation	8,145	20,145	15,070
Other	(629)	(85)	2,416
Income taxes (benefit)	$ 128,687	$ 91,040	$ 63,233

Income Taxes - Schedule Of Tax

Income Taxes - Schedule Of Tax Effects To Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Net operating loss carry-forwards	$ 34,787	$ 40,201
Capitalized research and development costs	337,626	267,744
Accrued compensation and benefits	13,493	11,995
Stock-based compensation	8,606	8,875
Deferred revenue	39,042	42,544
Lease liabilities	53,945	62,405
Other accruals and reserves	28,729	22,723
Tax credit carryforwards	25,052	23,883
Depreciation	1,507	531
Total deferred tax assets before deferred liabilities	542,787	480,901
Valuation allowance	(39,651)	(43,942)
Deferred tax assets, net of valuation allowance	503,136	436,959
Purchased intangibles	(53,047)	(55,519)
Depreciation	(29,441)	(28,113)
Deferred costs	(10,752)	(11,031)
Lease assets	(36,610)	(41,709)
Other accruals and reserves	(14,514)	(9,916)
Total deferred tax liabilities	(144,364)	(146,288)
Net deferred tax assets	$ 358,772	$ 290,671

Income Taxes - Schedule Of Reco

Income Taxes - Schedule Of Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Unrecognized Tax Benefits [Roll Forward]
Balance, beginning of period	$ 79,167	$ 66,840	$ 70,814
Gross increases related to prior period tax positions	7,939	4,270	4,816
Gross decreases related to prior period tax positions	(7,659)	(70)	(10,538)
Gross increases related to current period tax positions	8,494	9,224	10,203
Decreases relating to settlements with tax authorities	(50)	(300)	0
Reductions due to lapses of statute of limitations	(1,014)	(797)	(8,455)
Balance, end of period	$ 86,877	$ 79,167	$ 66,840

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Operating Loss Carryforwards [Line Items]
Income Tax Holiday, Aggregate Dollar Amount	$ 7,200	$ 6,000	$ 8,500
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.12	$ 0.10	$ 0.14
Deferred Tax Assets, Operating Loss Carryforwards	$ 34,787	$ 40,201
Deferred Tax Assets, Tax Credit Carryforwards	25,052	23,883
Valuation Allowance, Deferred Tax Asset, Change in Amount	(4,300)	(2,200)
Unrecognized Tax Benefits	86,877	79,167	$ 66,840	$ 70,814
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	56,200	51,200	43,200
Unrecognized Tax Benefits, Period Increase (Decrease)	5,600	3,300	$ (1,500)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	11,800	$ 6,200
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	54,900
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	200
Deferred Tax Assets, Tax Credit Carryforwards	400
Deferred Tax Assets, Tax Credit Carryforwards, Subject to Expiration	2,600
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	53,300
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	16,200
Deferred Tax Assets, Operating Loss Carryforwards	69,500
Deferred Tax Assets, Tax Credit Carryforwards, Subject to Expiration	3,500
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	45,500
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	153,800
Deferred Tax Assets, Operating Loss Carryforwards	199,300
Deferred Tax Assets, Tax Credit Carryforwards	33,900
Deferred Tax Assets, Tax Credit Carryforwards, Subject to Expiration	$ 3,400

Shareholders' Equity - Class of

Shareholders' Equity - Class of Treasury Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Equity, Class of Treasury Stock [Line Items]
Treasury Stock Acquired, Average Cost Per Share	$ 177.08	$ 142.62	$ 191.47
Stock Repurchased and Retired During Period, Value	$ 500,056	$ 350,049	$ 500,023
October 26, 2010 Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased and Retired During Period, Shares	2,824	2,454	2,611

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Details) - October Twenty Six Two Thousand Ten Program [Member] - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2023	Jul. 25, 2022
Common Stock Repurchase [Line Items]
Share Repurchase Program, Authorized, Amount		$ 5,400	$ 1,000
Share Repurchase Program, Remaining Authorized, Amount	$ 422.4

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions (Details)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Fair Value Assumptions
Expected dividend	0%	0%	0%
Expected term	6 months	6 months	6 months
Minimum
Fair Value Assumptions
Risk-free interest rate	5.28%	3.18%	0.05%
Expected volatility	18.19%	33.02%	26.34%
Maximum
Fair Value Assumptions
Risk-free interest rate	5.52%	4.90%	0.62%
Expected volatility	20.32%	38.15%	31.57%
Two Thousand Eleven Employee Stock Purchase Plan [Member]
Fair Value Assumptions
Expected term	6 months

Stock-Based Compensation - Sc_2

Stock-Based Compensation - Schedule Of Summary Of Restricted Stock Unit Activity (Details)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance	$ 144.78
Weighted Average Grant Date Fair Value, Ending balance	$ 155.99
Performance Shares [Member] \| Two Thousand Fourteen Equity Incentive Plan [Member]
Outstanding Restricted Stock Units
Outstanding Stock Units, Beginning balance \| shares	199,918
Outstanding Stock Units, Units granted \| shares	122,841
Outstanding Stock Units, Units vested \| shares	(90,274)
Outstanding Stock Units, Units cancelled \| shares	(18,709)
Outstanding Stock Units, Ending balance \| shares	213,776
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance	$ 159.37
Weighted Average Grant Date Fair Value, Units granted	152.14
Weighted Average Grant Date Fair Value, Units vested	153.03
Weighted Average Grant Date Fair Value, Units cancelled	178.05
Weighted Average Grant Date Fair Value, Ending balance	$ 155.63
Restricted Stock Units (RSUs) [Member] \| Two Thousand Fourteen Equity Incentive Plan [Member]
Outstanding Restricted Stock Units
Outstanding Stock Units, Beginning balance \| shares	1,225,386
Outstanding Stock Units, Units granted \| shares	1,459,527
Outstanding Stock Units, Units vested \| shares	(1,143,299)
Outstanding Stock Units, Units cancelled \| shares	(229,286)
Outstanding Stock Units, Ending balance \| shares	1,312,328
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance	$ 156.89
Weighted Average Grant Date Fair Value, Units granted	156.32
Weighted Average Grant Date Fair Value, Units vested	177.69
Weighted Average Grant Date Fair Value, Units cancelled	155.22
Weighted Average Grant Date Fair Value, Ending balance	$ 158.22

Stock-Based Compensation - Sc_3

Stock-Based Compensation - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	6 months	6 months	6 months
Expected dividend	0%	0%	0%
Tranche 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value, Per Share	$ 192.58
Expected term	10 months 28 days
Risk-free interest rate	5.32%
Expected dividend	0%
Tranche 1 [Member] \| F5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	22.60%
Tranche 1 [Member] \| Index Members [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	27.66%
Tranche 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value, Per Share	$ 203.37
Expected term	1 year 10 months 28 days
Risk-free interest rate	4.93%
Expected dividend	0%
Tranche 2 [Member] \| F5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	31.25%
Tranche 2 [Member] \| Index Members [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	32.35%
Tranche 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value, Per Share	$ 210.37
Expected term	2 years 10 months 28 days
Risk-free interest rate	4.72%
Expected dividend	0%
Tranche 3 [Member] \| F5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	29.55%
Tranche 3 [Member] \| Index Members [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	30.88%

Stock-Based Compensation - Sc_4

Stock-Based Compensation - Schedule of Nonvested Restricted Stock Units Activity (Details) - shares	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years	2 years	2 years
Annual Equity Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Of Annual Performance Stock Grant Vests In Equal Quarterly Increments	50%
Percentage Of Annual Performance Stock Grant Based On Achieving Specified Annual Performance Goals	50%
Annual Equity Program [Member] \| CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Of Annual Performance Stock Grant Vests In Equal Quarterly Increments	40%
Percentage Of Annual Performance Stock Grant Based On Achieving Specified Annual Performance Goals	60%
Annual Equity Program [Member] \| November 1, 2023 \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period	206,560
Award vesting period	3 years
Annual Equity Program [Member] \| November 1, 2022 \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period	240,808
Award vesting period	3 years
Annual Equity Program [Member] \| November 1, 2021 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period	160,384
Award vesting period	3 years
Annual Equity Program [Member] \| November 2, 2020 \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period	257,568
Award vesting period	3 years

Stock-Based Compensation - Sc_5

Stock-Based Compensation - Schedule Of Stock Option Activity (Details)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Number of Shares
Number of Shares, Beginning balance \| shares	105,868
Number of Shares, Options granted \| shares	0
Number of Shares, Options exercised \| shares	(49,782)
Number of Shares, Options cancelled \| shares	(1,996)
Number of Shares, Ending balance \| shares	54,090
Weighted Average Exercise Price per Share
Weighted Average Exercise Price per Share, Beginning balance \| $ / shares	$ 35.31
Weighted Average Exercise Price per Share, Options granted \| $ / shares	0
Weighted Average Exercise Price per Share, Options exercised \| $ / shares	29.64
Weighted Average Exercise Price per Share, Options cancelled \| $ / shares	67.22
Weighted Average Exercise Price per Share, Ending balance \| $ / shares	$ 39.36

Stock-Based Compensation - Sc_6

Stock-Based Compensation - Schedule Of Outstanding Stock Options Currently Exercisable, Vested And Expected To Vest (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Stock options outstanding	54,090	105,868
Stock options outstanding, Weighted Average Remaining Contractual Life (in Years)	4 years 6 months 21 days
Stock options outstanding, Weighted Average Exercise Price per Share	$ 39.36	$ 35.31
Stock options outstanding, Aggregate Intrinsic Value	$ 9,782
Exercisable, Number of Shares	53,648
Exercisable, Weighted Average Remaining Contractual Life (in Years)	4 years 6 months 18 days
Exercisable, Weighted Average Exercise Price per Share	$ 39.65
Exercisable, Aggregate Intrinsic Value	$ 9,686
Vested and expected to vest, Number of Shares	54,072
Vested and expected to vest, Weighted Average Remaining Contractual Life (in Years)	4 years 6 months 21 days
Vested and expected to vest, Weighted Average Exercise Price per Share	$ 39.37
Vested and expected to vest, Aggregate Intrinsic Value	$ 9,778

Stock-Based Compensation - Sc_7

Stock-Based Compensation - Schedule Of Equity Based Awards (Including Stock Options And Restricted Stock Units (Details) - Equity Based Awards [Member]	12 Months Ended
	Sep. 30, 2024 shares
Awards Available for Grant
Awards Available for Grant, Beginning balance	5,296,803
Awards Available for Grant, Granted	(1,582,368)
Awards Available for Grant, Cancelled	282,731
Additional shares reserved (terminated), net	(44,266)
Awards Available for Grant, Ending balance	3,952,900

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($)		12 Months Ended
Stock-Based Compensation - Narrative (Details) - USD ($)	Oct. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense		$ 219,100,000	$ 236,700,000	$ 249,200,000
Share-based Payment Arrangement, Expense, Tax Benefit		44,400,000	$ 44,700,000	$ 47,300,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 171,200,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		2 years
Expected term		6 months	6 months	6 months
Weighted Average Grant Date Fair Value		$ 155.99	$ 144.78	$ 206.13
Fair market value of restricted stock vested		$ 228,100,000	$ 195,900,000	$ 262,400,000
Total intrinsic value of options exercised		$ 7,500,000	$ 6,900,000	$ 25,600,000
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period	748,580
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		2 years	2 years	2 years
Two Thousand Eleven Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance		12,000,000
Percentage of base compensation for which employees can acquire shares of common stock		15%
Maximum shares allowed for purchase by employee in period		10,000
Maximum aggregate fair value of stock that an employee may purchase		$ 25,000
Expected term		6 months
Percentage of common stock lesser of the fair market value		85%
Number of Shares Authorized		2,007,597
Two Thousand Fourteen Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance		27,880,000
Number of Shares Authorized		3,952,900
Vesting rate of stock options and awards upon certain changes in ownership control		50%
Two Thousand Fourteen Equity Incentive Plan [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period		122,841
Outstanding stock units		213,776	199,918
Shares Issued in Period		122,841
Weighted Average Grant Date Fair Value		$ 155.63	$ 159.37
Two Thousand Fourteen Equity Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Grants in Period		1,459,527
Outstanding stock units		1,312,328	1,225,386
Shares Issued in Period		1,459,527
Weighted Average Grant Date Fair Value		$ 158.22	$ 156.89
Nginx Acquisition Equity Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock units		19
Volterra Acquisition Equity Incentive Plan \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock units		4,679
Threat Stack Acquisition Equity Incentive Plan \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock units		2,351
Lilac Acquisition Equity Incentive Plan \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock units		20,601
Lilac Cloud 2018 Equity Incentive Plan \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock units		1,059
Lilac Cloud 2018 Equity Incentive Plan \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for purchase under stock option plan		947
Nginx, Inc. 2011 Share Plan [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for purchase under stock option plan		3,374
Shape 2011 Share Plan [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for purchase under stock option plan		31,363
Volterra 2017 Stock Plan \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for purchase under stock option plan		18,406

Net Income Per Share (Details)

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Net Income Per Share [Abstract]
Net income	$ 566,778	$ 394,948	$ 322,160
Weighted average shares - basic (shares)	58,720	59,909	60,274
Weighted Average Number Diluted Shares Outstanding Adjustment	639	361	823
Weighted Average Number of Shares Outstanding, Diluted	59,359	60,270	61,097
Net income per share - basic (USD per share)	$ 9.65	$ 6.59	$ 5.34
Net income per share - diluted (USD per share)	$ 9.55	$ 6.55	$ 5.27

Commitments And Contingencies N

Commitments And Contingencies Narrative (Details) - USD ($) $ in Millions	Apr. 11, 2023	Oct. 27, 2022	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One		$ 10
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two		10
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three		10
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four		10
Unrecorded Unconditional Purchase Obligation		$ 40	$ 20
Unrecorded Unconditional Purchase Obligation, Term		4 years
Litigation Settlement, Amount Awarded from Other Party	$ 0.8

Restructuring Charges (Details)

Restructuring Charges (Details) $ in Thousands	12 Months Ended
Restructuring Charges (Details) $ in Thousands	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) Rate	Sep. 30, 2022 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8,655	$ 65,388	$ 7,909
Q1 2024 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 9,800
Q3 2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Severance Costs		$ 53,200
Number of employees affected		620
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent \| Rate		9%
Other Restructuring Costs		$ 3,500
Restructuring charges		56,700
Payments for Restructuring		49,700
Restructuring Reserve		3,500
Q1 2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 8,700
Q1 2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 7,900

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Contributions by the Company to the plan	$ 12.2	$ 13.7	$ 14
Employer contribution, vesting period	4 years	4 years	4 years

Segment Information - Revenues

Segment Information - Revenues by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Schedule of Revenues by Geographic Region [Line Items]
Net revenues	$ 2,816,120	$ 2,813,169	$ 2,695,845
United States
Schedule of Revenues by Geographic Region [Line Items]
Net revenues	1,488,413	1,487,416	1,487,144
Other Americas
Schedule of Revenues by Geographic Region [Line Items]
Net revenues	92,859	96,958	85,711
Total Americas
Schedule of Revenues by Geographic Region [Line Items]
Net revenues	1,581,272	1,584,374	1,572,855
EMEA
Schedule of Revenues by Geographic Region [Line Items]
Net revenues	755,934	741,598	634,759
APAC
Schedule of Revenues by Geographic Region [Line Items]
Net revenues	$ 478,914	$ 487,197	$ 488,231

Segment Information - Product R

Segment Information - Product Revenues by Systems and Software (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Schedule of Product Information [Line Items]
Net revenues	$ 2,816,120	$ 2,813,169	$ 2,695,845
Product [Member]
Schedule of Product Information [Line Items]
Net revenues	1,272,795	1,334,638	1,317,117
Systems \| Product [Member]
Schedule of Product Information [Line Items]
Net revenues	537,318	670,652	651,902
Software \| Product [Member]
Schedule of Product Information [Line Items]
Net revenues	$ 735,477	$ 663,986	$ 665,215

Segment Information - Revenue b

Segment Information - Revenue by Major Customers (Details) - Revenue Benchmark [Member] - Geographic Concentration Risk [Member]	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Ingram Micro, Inc.
Revenue, Major Customer [Line Items]
Concentration risk percentage	16.30%	15.60%	20%
Synnex Corporation
Revenue, Major Customer [Line Items]
Concentration risk percentage	15.90%	15%	13.40%

Segment Information - Receivabl

Segment Information - Receivables by Major Customers (Details) - Accounts Receivable [Member] - Geographic Concentration Risk [Member]	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Ingram Micro, Inc.
Schedule of Receivables by Major Customers by Reporting Segments [Line Items]
Concentration risk percentage	20.30%	0%
Synnex Corporation
Schedule of Receivables by Major Customers by Reporting Segments [Line Items]
Concentration risk percentage	14.80%	16%
Carahsoft Technology Corporation
Schedule of Receivables by Major Customers by Reporting Segments [Line Items]
Concentration risk percentage	0%	10.10%

Segment Information - Long-live

Segment Information - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Schedule of Revenues by Geographic Region [Line Items]
Property, Plant and Equipment, Net	$ 150,943	$ 170,422
United States
Schedule of Revenues by Geographic Region [Line Items]
Property, Plant and Equipment, Net	112,420	125,736
Other Americas
Schedule of Revenues by Geographic Region [Line Items]
Property, Plant and Equipment, Net	1,773	2,592
Total Americas
Schedule of Revenues by Geographic Region [Line Items]
Property, Plant and Equipment, Net	114,193	128,328
EMEA
Schedule of Revenues by Geographic Region [Line Items]
Property, Plant and Equipment, Net	21,970	24,336
APAC
Schedule of Revenues by Geographic Region [Line Items]
Property, Plant and Equipment, Net	$ 14,780	$ 17,758

Segment Information - Narrative

Segment Information - Narrative (Details) - geographic_region	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Number of Geographic Regions	3	3	3

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Thousands		12 Months Ended
Subsequent Events (Details) - USD ($) $ in Thousands	Oct. 25, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Jul. 25, 2022
Subsequent Event [Line Items]
Right-of-use assets obtained in exchange for lease obligations		$ 12,927	$ 10,544	$ 20,778
October 26, 2010 Program [Member]
Subsequent Event [Line Items]
Share Repurchase Program, Authorized, Amount					$ 5,400,000	$ 1,000,000
Share Repurchase Program, Remaining Authorized, Amount		$ 422,400
Subsequent Event [Member]
Subsequent Event [Line Items]
Share Repurchase Program, Authorized, Amount	$ 1,000,000
Right-of-use assets obtained in exchange for lease obligations	22,800
Increase (Decrease) in Operating Lease Liability	$ 29,600