$FFIV
F5, INC. Stock $ffiv

$ffiv Overview Financials Valuation SEC Filings Company Website

2021 Q3 Form 10-K Financial Statement

#000104869521000044 Filed on November 16, 2021

Income Statement

Concept	2021 Q3	2021	2020 Q3
Revenue	$682.0M	$2.603B	$614.8M
YoY Change	10.93%	10.74%	4.14%
Cost Of Revenue	$128.7M	$493.1M	$112.0M
YoY Change	14.92%	20.9%	23.15%
Gross Profit	$553.3M	$2.110B	$502.8M
YoY Change	10.04%	8.61%	0.68%
Gross Profit Margin	81.13%	81.06%	81.79%
Selling, General & Admin	$302.3M	$1.204B	$283.9M
YoY Change	6.45%	9.27%	0.71%
% of Gross Profit	54.63%	57.04%	56.47%
Research & Development	$124.7M	$512.6M	$120.3M
YoY Change	3.66%	16.16%	17.01%
% of Gross Profit	22.54%	24.29%	23.92%
Depreciation & Amortization	$30.44M	$115.4M	$26.60M
YoY Change	14.43%	20.41%	21.46%
% of Gross Profit	5.5%	5.47%	5.29%
Operating Expenses	$427.0M	$1.716B	$404.2M
YoY Change	5.62%	10.68%	5.06%
Operating Profit	$126.4M	$394.0M	$98.61M
YoY Change	28.14%	0.45%	-14.04%
Interest Expense	-$2.865M	-$7.088M
YoY Change		-250.81%
% of Operating Profit	-2.27%	-1.8%
Other Income/Expense, Net		-$7.088M	-$1.090M
YoY Change		-271.62%	-132.09%
Pretax Income	$123.5M	$386.9M	$97.52M
YoY Change	26.64%	-2.39%	-17.43%
Income Tax	$12.78M	$55.70M	$19.86M
% Of Pretax Income	10.35%	14.39%	20.36%
Net Earnings	$110.7M	$331.2M	$77.66M
YoY Change	42.56%	7.74%	-18.11%
Net Earnings / Revenue	16.23%	12.72%	12.63%
Basic Earnings Per Share		$5.46	$1.27
Diluted Earnings Per Share	$1.785M	$5.34	$1.26
COMMON SHARES
Basic Shares Outstanding	60.31M shares	60.71M shares	61.15M shares
Diluted Shares Outstanding		62.06M shares	61.64M shares

Balance Sheet

Concept	2021 Q3	2021	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$910.6M	$910.6M	$1.210B
YoY Change	-24.74%	-24.74%	24.44%
Cash & Equivalents	$581.0M	$581.0M	$849.6M
Short-Term Investments	$329.6M	$329.6M	$360.3M
Other Short-Term Assets	$337.9M	$122.5M	$259.5M
YoY Change	30.21%	0.91%	41.9%
Inventory	$22.06M	$22.06M	$27.90M
Prepaid Expenses	$59.64M		$47.20M
Receivables	$340.5M	$555.9M	$296.2M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.611B	$1.611B	$1.793B
YoY Change	-10.17%	-10.17%	18.65%
LONG-TERM ASSETS
Property, Plant & Equipment	$191.2M	$436.1M	$229.2M
YoY Change	-16.61%	-17.7%	2.6%
Goodwill	$2.217B		$1.859B
YoY Change	19.24%		74.49%
Intangibles
YoY Change
Long-Term Investments	$132.8M	$132.8M	$102.9M
YoY Change	29.04%	29.04%	-71.29%
Other Assets	$472.6M	$204.7M	$347.4M
YoY Change	36.01%	96.25%	70.5%
Total Long-Term Assets	$3.386B	$3.386B	$2.884B
YoY Change	17.39%	17.4%	53.53%
TOTAL ASSETS
Total Short-Term Assets	$1.611B	$1.611B	$1.793B
Total Long-Term Assets	$3.386B	$3.386B	$2.884B
Total Assets	$4.997B	$4.997B	$4.678B
YoY Change	6.83%	6.83%	37.98%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$62.10M	$62.10M	$64.47M
YoY Change	-3.69%	-3.73%	2.95%
Accrued Expenses	$341.5M	$297.4M	$321.4M
YoY Change	6.25%	3.12%	36.26%
Deferred Revenue	$968.7M		$883.1M
YoY Change	9.69%		9.43%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$19.28M	$19.28M	$19.28M
YoY Change	0.0%	-0.13%
Total Short-Term Liabilities	$1.392B	$1.392B	$1.288B
YoY Change	8.01%	8.01%	16.53%
LONG-TERM LIABILITIES
Long-Term Debt	$349.8M	$349.8M	$369.0M
YoY Change	-5.22%	-5.21%
Other Long-Term Liabilities	$75.24M	$893.4M	$59.51M
YoY Change	26.42%	13.41%	-54.87%
Total Long-Term Liabilities	$1.246B	$1.243B	$1.157B
YoY Change	7.62%	7.47%	121.19%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.392B	$1.392B	$1.288B
Total Long-Term Liabilities	$1.246B	$1.243B	$1.157B
Total Liabilities	$2.637B	$2.637B	$2.446B
YoY Change	7.83%	7.82%	50.15%
SHAREHOLDERS EQUITY
Retained Earnings	$2.188B		$1.946B
YoY Change	12.45%		18.77%
Common Stock	$192.5M		$305.5M
YoY Change	-36.99%		114.21%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.360B	$2.360B	$2.232B
YoY Change
Total Liabilities & Shareholders Equity	$4.997B	$4.997B	$4.678B
YoY Change	6.83%	6.83%	37.98%

Cashflow Statement

Concept	2021 Q3	2021	2020 Q3
OPERATING ACTIVITIES
Net Income	$110.7M	$331.2M	$77.66M
YoY Change	42.56%	7.74%	-18.11%
Depreciation, Depletion And Amortization	$30.44M	$115.4M	$26.60M
YoY Change	14.43%	20.41%	21.46%
Cash From Operating Activities	$197.1M	$645.2M	$175.9M
YoY Change	12.03%	-2.38%	-14.61%
INVESTING ACTIVITIES
Capital Expenditures	-$7.117M	$30.65M	-$12.00M
YoY Change	-40.69%	-48.86%	-41.46%
Acquisitions		$411.3M
YoY Change		-56.96%
Other Investing Activities	-$184.5M	-$414.7M	$27.90M
YoY Change	-761.39%	-39.65%	-110.2%
Cash From Investing Activities	-$191.6M	-$445.3M	$15.80M
YoY Change	-1312.94%	-40.38%	-105.37%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$500.0M
YoY Change		399.92%
Debt Paid & Issued, Net		$20.00M
YoY Change		100.0%
Cash From Financing Activities	-7.058M	-$468.3M	-56.80M
YoY Change	-87.57%	-238.86%	-28500.0%
NET CHANGE
Cash From Operating Activities	197.1M	$645.2M	175.9M
Cash From Investing Activities	-191.6M	-$445.3M	15.80M
Cash From Financing Activities	-7.058M	-$468.3M	-56.80M
Net Change In Cash	-1.649M	-$268.4M	134.9M
YoY Change	-101.22%	-206.88%	-253.64%
FREE CASH FLOW
Cash From Operating Activities	$197.1M	$645.2M	$175.9M
Capital Expenditures	-$7.117M	$30.65M	-$12.00M
Free Cash Flow	$204.2M	$614.5M	$187.9M
YoY Change	8.66%	2.26%	-17.04%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001048695
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	000-26041
CY2021	dei	Entity Registrant Name EntityRegistrantName	F5, Inc.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	91-1714307
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	801 5th Avenue
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Seattle
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98104
CY2021	dei	City Area Code CityAreaCode	206
CY2021	dei	Local Phone Number LocalPhoneNumber	272-5555
CY2021	dei	Security12b Title Security12bTitle	Common stock, no par value
CY2021	dei	Trading Symbol TradingSymbol	FFIV
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q1	dei	Entity Public Float EntityPublicFloat	12481712486	USD
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	61229388	shares
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	580977000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	849556000	USD
CY2021Q3	us-gaap	Short Term Investments ShortTermInvestments	329630000	USD
CY2020Q3	us-gaap	Short Term Investments ShortTermInvestments	360333000	USD
CY2021Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3696000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3105000	USD
CY2021Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	340536000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	296183000	USD
CY2021Q3	us-gaap	Inventory Net InventoryNet	22055000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	27898000	USD
CY2021Q3	us-gaap	Other Assets Current OtherAssetsCurrent	337902000	USD
CY2020Q3	us-gaap	Other Assets Current OtherAssetsCurrent	259506000	USD
CY2021Q3	us-gaap	Assets Current AssetsCurrent	1611100000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	1793476000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	191164000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	229239000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	244934000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	300680000	USD
CY2021Q3	us-gaap	Long Term Investments LongTermInvestments	132778000	USD
CY2020Q3	us-gaap	Long Term Investments LongTermInvestments	102939000	USD
CY2021Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	128193000	USD
CY2020Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	45173000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	2216553000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1858966000	USD
CY2021Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	472558000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	347447000	USD
CY2021Q3	us-gaap	Assets Assets	4997280000	USD
CY2020Q3	us-gaap	Assets Assets	4677920000	USD
CY2021Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	62096000	USD
CY2020Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	64472000	USD
CY2021Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	341487000	USD
CY2020Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	321398000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	968669000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	883134000	USD
CY2021Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	19275000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	19275000	USD
CY2021Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1391527000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1288279000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	2414000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	602000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	521173000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	389498000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	296945000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	338715000	USD
CY2021Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	349772000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	369047000	USD
CY2021Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	75236000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	59511000	USD
CY2021Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1245540000	USD
CY2020Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1157373000	USD
CY2021Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2020Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2021Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2020Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2021Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2021Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2021Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2187828000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1945531000	USD
CY2020Q3	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2021Q3	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2021Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60652000	shares
CY2021Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60652000	shares
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	61099000	shares
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	61099000	shares
CY2021Q3	us-gaap	Common Stock Value CommonStockValue	192458000	USD
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	305453000	USD
CY2021Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-20073000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-18716000	USD
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2360213000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2603416000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2350822000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2232268000	USD
CY2021Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4997280000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4677920000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2242447000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	493146000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	407887000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	356577000	USD
CY2021	us-gaap	Gross Profit GrossProfit	2110270000	USD
CY2020	us-gaap	Gross Profit GrossProfit	1942935000	USD
CY2019	us-gaap	Gross Profit GrossProfit	1885870000	USD
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	929983000	USD
CY2020	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	843178000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	748619000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	512627000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	7800000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-7088000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4130000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	441324000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	408058000	USD
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	273635000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	258366000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	210730000	USD
CY2021	us-gaap	Operating Expenses OperatingExpenses	1716245000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	1550668000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	1367407000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	394025000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	392267000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	518463000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	22648000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	386937000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	396397000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	541111000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	55696000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88956000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	113377000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	331241000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	307441000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	427734000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.46
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.05
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.12
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60707000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60911000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60044000	shares
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.34
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.01
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.08
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62057000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61378000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	60456000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	331241000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	307441000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	427734000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-68000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-572000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-837000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-234000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	76000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	954000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1557000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	809000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3715000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	307915000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	430722000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1357000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1285492000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-69000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-65000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-35000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-268000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-237000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-110000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-1289000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	1046000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	3825000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	474000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2988000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	329884000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	159000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	45439000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	201045000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	164682000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	427734000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2988000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1761497000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2596000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	50239000	USD
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	100016000	USD
CY2020	ffiv	Cost Of Issuance Of Treasury Stock CostOfIssuanceOfTreasuryStock	2536000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	212573000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	307441000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	474000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2232268000	USD
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	4864000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	60888000	USD
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	500000000	USD
CY2021	ffiv	Cost Of Issuance Of Treasury Stock CostOfIssuanceOfTreasuryStock	14032000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	246341000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	331241000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1357000	USD
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2360213000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	331241000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	307441000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	427734000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	243279000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	201948000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	162914000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	115424000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	95857000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	68507000	USD
CY2021	ffiv	Non Cash Operating Lease Costs NonCashOperatingLeaseCosts	38375000	USD
CY2020	ffiv	Non Cash Operating Lease Costs NonCashOperatingLeaseCosts	39139000	USD
CY2019	ffiv	Non Cash Operating Lease Costs NonCashOperatingLeaseCosts	0	USD
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-76930000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	7293000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	7440000	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	40698000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	9673000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6273000	USD
CY2021	us-gaap	Business Exit Costs1 BusinessExitCosts1	0	USD
CY2020	us-gaap	Business Exit Costs1 BusinessExitCosts1	0	USD
CY2019	us-gaap	Business Exit Costs1 BusinessExitCosts1	8211000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-737000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2122000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1662000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	46289000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-46502000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	74710000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	18305000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-5843000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-6503000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3832000	USD
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	84328000	USD
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	49895000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	75449000	USD
CY2021	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	110653000	USD
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	25690000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	22742000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	22933000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	34742000	USD
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	216431000	USD
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	35514000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	110718000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	747841000	USD
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	472165000	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	584240000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	602987000	USD
CY2021	ffiv	Increase Decreasein Lease Liabilities IncreaseDecreaseinLeaseLiabilities	-51565000	USD
CY2020	ffiv	Increase Decreasein Lease Liabilities IncreaseDecreaseinLeaseLiabilities	-50251000	USD
CY2019	ffiv	Increase Decreasein Lease Liabilities IncreaseDecreaseinLeaseLiabilities	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	645196000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	660898000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	197279000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	543065000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	625201000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	271521000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	309687000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	278244000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	411319000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	955574000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	611550000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	30651000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	59940000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	103542000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-445335000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-747002000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-414634000	USD
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	65752000	USD
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	52835000	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	45598000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	500000000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100016000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	201045000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	400000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	20000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3040000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2021	ffiv	Cost Of Issuance Of Treasury Stock CostOfIssuanceOfTreasuryStock	14032000	USD
CY2020	ffiv	Cost Of Issuance Of Treasury Stock CostOfIssuanceOfTreasuryStock	2536000	USD
CY2019	ffiv	Cost Of Issuance Of Treasury Stock CostOfIssuanceOfTreasuryStock	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-468280000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	337243000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-155447000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-268419000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	251139000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	177760000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-74000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-567000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	5280000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-1400000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	852826000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	602254000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	425894000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	584333000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	852826000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	602254000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	99378000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	80236000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	100569000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	61504000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	60564000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	6568000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13051000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	402007000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2021	us-gaap	Other Significant Noncash Transaction Value Of Consideration Received1 OtherSignificantNoncashTransactionValueOfConsiderationReceived1	0	USD
CY2020	us-gaap	Other Significant Noncash Transaction Value Of Consideration Received1 OtherSignificantNoncashTransactionValueOfConsiderationReceived1	0	USD
CY2019	us-gaap	Other Significant Noncash Transaction Value Of Consideration Received1 OtherSignificantNoncashTransactionValueOfConsiderationReceived1	34948000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:14pt;text-indent:11.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates and Assumptions</span></div><div style="margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 with non-standard terms, and the allocation of purchase consideration based on the relative fair value standalone sales price 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 due to risks and uncertainties, including uncertainty in the current economic environment due to the global impact of the COVID-19 pandemic.</span></div>
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-top:14pt;text-indent:11.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentration of Credit Risk</span></div><div style="margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 16 - Segment Information, for disaggregated accounts receivable by significant customer.</span></div><div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company maintains its cash and investment balances with high credit quality financial institutions.</span></div>
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="margin-top:14pt;text-indent:11.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Guarantees and Product Warranties</span></div><div style="margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 </span></div><div style="margin-top:5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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.</span></div><div style="margin-top:9pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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.</span></div>
CY2021	us-gaap	Advertising Expense AdvertisingExpense	10000000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	7800000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	4700000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	70396000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	59446000	USD
CY2018Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	0	USD
CY2021	ffiv	Capitalized Contract Cost Cumulative Catchup Adjustmentto Revenue Changein Estimateof Transaction Price CapitalizedContractCostCumulativeCatchupAdjustmenttoRevenueChangeinEstimateofTransactionPrice	0	USD
CY2020	ffiv	Capitalized Contract Cost Cumulative Catchup Adjustmentto Revenue Changein Estimateof Transaction Price CapitalizedContractCostCumulativeCatchupAdjustmenttoRevenueChangeinEstimateofTransactionPrice	0	USD
CY2019	ffiv	Capitalized Contract Cost Cumulative Catchup Adjustmentto Revenue Changein Estimateof Transaction Price CapitalizedContractCostCumulativeCatchupAdjustmenttoRevenueChangeinEstimateofTransactionPrice	54608000	USD
CY2021	ffiv	Capitalized Contract Cost Deferred Acquisition Costs CapitalizedContractCostDeferredAcquisitionCosts	41719000	USD
CY2020	ffiv	Capitalized Contract Cost Deferred Acquisition Costs CapitalizedContractCostDeferredAcquisitionCosts	43557000	USD
CY2019	ffiv	Capitalized Contract Cost Deferred Acquisition Costs CapitalizedContractCostDeferredAcquisitionCosts	33925000	USD
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	34279000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	32607000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	29087000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	77836000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	70396000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	59446000	USD
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	34300000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	32600000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	29100000	USD
CY2020	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2019	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	200472000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	132492000	USD
CY2018Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	USD
CY2021	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	0	USD
CY2020	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	0	USD
CY2019	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	57499000	USD
CY2021	ffiv	Contractwith Customer Asset Revenue Recognized But Not Yet Billed ContractwithCustomerAssetRevenueRecognizedButNotYetBilled	60511000	USD
CY2020	ffiv	Contractwith Customer Asset Revenue Recognized But Not Yet Billed ContractwithCustomerAssetRevenueRecognizedButNotYetBilled	37260000	USD
CY2019	ffiv	Contractwith Customer Asset Revenue Recognized But Not Yet Billed ContractwithCustomerAssetRevenueRecognizedButNotYetBilled	27459000	USD
CY2021	ffiv	Contractwith Customer Asset New Contract Additions ContractwithCustomerAssetNewContractAdditions	256437000	USD
CY2020	ffiv	Contractwith Customer Asset New Contract Additions ContractwithCustomerAssetNewContractAdditions	129578000	USD
CY2019	ffiv	Contractwith Customer Asset New Contract Additions ContractwithCustomerAssetNewContractAdditions	88068000	USD
CY2021	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	-143138000	USD
CY2020	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	-98858000	USD
CY2019	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	-40534000	USD
CY2021Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	374282000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	200472000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	132492000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1272632000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1198116000	USD
CY2018Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1015321000	USD
CY2021	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	0	USD
CY2020	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	0	USD
CY2019	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	68078000	USD
CY2021	ffiv	Contractwith Customer Liability Revenue Recognized But Not Yet Billed ContractwithCustomerLiabilityRevenueRecognizedButNotYetBilled	1122081000	USD
CY2020	ffiv	Contractwith Customer Liability Revenue Recognized But Not Yet Billed ContractwithCustomerLiabilityRevenueRecognizedButNotYetBilled	850022000	USD
CY2019	ffiv	Contractwith Customer Liability Revenue Recognized But Not Yet Billed ContractwithCustomerLiabilityRevenueRecognizedButNotYetBilled	866142000	USD
CY2021	us-gaap	Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	779000	USD
CY2020	us-gaap	Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	39000000	USD
CY2019	us-gaap	Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	0	USD
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-905650000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-814506000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-751425000	USD
CY2021Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1489842000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1272632000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1198116000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1500000000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.650
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.213
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	40698000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	9673000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6273000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	2500000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	12200000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	25300000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	274535000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	121000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	274535000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	121000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	85304000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	31000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	5006000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	90310000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	32000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	580977000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	849556000	USD
CY2021Q3	us-gaap	Restricted Cash RestrictedCash	3356000	USD
CY2020Q3	us-gaap	Restricted Cash RestrictedCash	3270000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	584333000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	852826000	USD
CY2021Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	13081000	USD
CY2020Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	17096000	USD
CY2021Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	8974000	USD
CY2020Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	10802000	USD
CY2021Q3	us-gaap	Inventory Net InventoryNet	22055000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	27898000	USD
CY2021Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	215396000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	138096000	USD
CY2021Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	59636000	USD
CY2020Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	47197000	USD
CY2021Q3	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	34265000	USD
CY2020Q3	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	29650000	USD
CY2021Q3	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	28605000	USD
CY2020Q3	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	44563000	USD
CY2021Q3	us-gaap	Other Assets Current OtherAssetsCurrent	337902000	USD
CY2020Q3	us-gaap	Other Assets Current OtherAssetsCurrent	259506000	USD
CY2021Q3	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	166846000	USD
CY2020Q3	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	153256000	USD
CY2021Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	94169000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	95288000	USD
CY2021Q3	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	45204000	USD
CY2020Q3	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	45280000	USD
CY2021Q3	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	174504000	USD
CY2020Q3	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	175593000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	480723000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	469417000	USD
CY2021Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	289559000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	240178000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	191164000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	229239000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	1065379000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	799611000	USD
CY2020	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	6024000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1858966000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	351417000	USD
CY2021	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-6170000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	2216553000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	237178000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	225900000	USD
CY2021Q3	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	158885000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	62377000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	43571000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	40746000	USD
CY2021Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	32924000	USD
CY2021Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	472558000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	347447000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	394908000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	157730000	USD
CY2020Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	18424000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	237178000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	334908000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	109008000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	225900000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	48700000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	34600000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11800000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	50095000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	49125000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	43860000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	38124000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	32860000	USD
CY2021Q3	ffiv	Finite Lived Intangible Assets Total Amortization Expense For Next Five Years FiniteLivedIntangibleAssetsTotalAmortizationExpenseForNextFiveYears	214064000	USD
CY2021Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	179147000	USD
CY2020Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	169708000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	49286000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	46010000	USD
CY2021Q3	us-gaap	Taxes Payable Current TaxesPayableCurrent	44075000	USD
CY2020Q3	us-gaap	Taxes Payable Current TaxesPayableCurrent	33048000	USD
CY2021Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	68979000	USD
CY2020Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	72632000	USD
CY2021Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	341487000	USD
CY2020Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	321398000	USD
CY2021Q3	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	66081000	USD
CY2020Q3	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	49846000	USD
CY2021Q3	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	9155000	USD
CY2020Q3	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	9665000	USD
CY2021Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	75236000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	59511000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	47993000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	49925000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2953000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3563000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	25200000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	21980000	USD
CY2021	us-gaap	Lease Cost LeaseCost	76146000	USD
CY2020	us-gaap	Lease Cost LeaseCost	75468000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	244934000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	300680000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	49286000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	46010000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	296945000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	338715000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	346231000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	384725000	USD
CY2021Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y8M12D
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y2M12D
CY2021Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0260
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0258
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	57849000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	48458000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	41142000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	33600000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	26609000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	191142000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	398800000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	52569000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	346231000	USD
CY2021	us-gaap	Sublease Income SubleaseIncome	13000000	USD
CY2021Q3	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	5700000	USD
CY2021Q3	ffiv	Lessor Operating Lease Payments To Be Received Two To Four Years LessorOperatingLeasePaymentsToBeReceivedTwoToFourYears	7300000	USD
CY2021Q1	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	23500000	USD
CY2020Q4	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	6700000	USD
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	9700000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	54046000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	683000	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments Within One Year FutureMinimumOperatingNetLeasePaymentsWithinOneYear	53363000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	50712000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	1051000	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments Within Two Year FutureMinimumOperatingNetLeasePaymentsWithinTwoYear	49661000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	47550000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	1082000	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments Within Three Year FutureMinimumOperatingNetLeasePaymentsWithinThreeYear	46468000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	36514000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	368000	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments Within Four Year FutureMinimumOperatingNetLeasePaymentsWithinFourYear	36146000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	33971000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	0	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments Within Five Year FutureMinimumOperatingNetLeasePaymentsWithinFiveYear	33971000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	242826000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	0	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments Within Thereafter FutureMinimumOperatingNetLeasePaymentsWithinThereafter	242826000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	465619000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	3184000	USD
CY2019Q3	ffiv	Future Minimum Operating Net Lease Payments FutureMinimumOperatingNetLeasePayments	462435000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	189398000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	216409000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	360648000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	197539000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	179988000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	180463000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	386937000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	396397000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	541111000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	53107000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	26978000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	43039000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	16686000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4230000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	13864000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	62832000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	50368000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	49197000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	132625000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	81576000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	106100000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-61739000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	10875000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	8716000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-15294000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1121000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1617000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	104000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2374000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3056000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-76929000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7380000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7277000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	55696000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88956000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	113377000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	81257000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	83243000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	113633000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5118000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4258000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	14206000	USD
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-26881000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-7693000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-9161000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	18055000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	11843000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	12760000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	12740000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	18002000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	6771000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1517000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2989000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	688000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	55696000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88956000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	113377000	USD
CY2021	us-gaap	Income Tax Holiday Aggregate Dollar Amount IncomeTaxHolidayAggregateDollarAmount	6000000	USD
CY2020	us-gaap	Income Tax Holiday Aggregate Dollar Amount IncomeTaxHolidayAggregateDollarAmount	8200000	USD
CY2019	us-gaap	Income Tax Holiday Aggregate Dollar Amount IncomeTaxHolidayAggregateDollarAmount	8100000	USD
CY2021	us-gaap	Income Tax Holiday Income Tax Benefits Per Share IncomeTaxHolidayIncomeTaxBenefitsPerShare	0.10
CY2020	us-gaap	Income Tax Holiday Income Tax Benefits Per Share IncomeTaxHolidayIncomeTaxBenefitsPerShare	0.13
CY2019	us-gaap	Income Tax Holiday Income Tax Benefits Per Share IncomeTaxHolidayIncomeTaxBenefitsPerShare	0.13
CY2021Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	41252000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	54842000	USD
CY2021Q3	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	95259000	USD
CY2020Q3	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	0	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	13207000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	13162000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	12829000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	13010000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	30115000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	40577000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	23747000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	19656000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	18450000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	17384000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	34187000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	15807000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	580000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	620000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	269626000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	175058000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	40404000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	32587000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	229222000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	142471000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	57219000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	46491000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	26516000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	34757000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Deferred Expense Other Capitalized Costs DeferredTaxLiabilitiesDeferredExpenseOtherCapitalizedCosts	13057000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Deferred Expense Other Capitalized Costs DeferredTaxLiabilitiesDeferredExpenseOtherCapitalizedCosts	11924000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	6651000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	4728000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	103443000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	97900000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	125779000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	44571000	USD
CY2021	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	7800000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	9100000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	51767000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42287000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31672000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	14867000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	8664000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	5129000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1051000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	287000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	12595000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	9272000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7756000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	321000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	3578000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	8094000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3827000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1983000	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	70814000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	51767000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42287000	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	70800000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	51800000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42300000	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	39200000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	34300000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	29400000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	1400000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-1000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	2400000	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	4400000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	137.84
CY2020Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3000000	USD
CY2021Q1	us-gaap	Accelerated Share Repurchases Settlement Payment Or Receipt AcceleratedShareRepurchasesSettlementPaymentOrReceipt	500000000	USD
CY2021Q1	us-gaap	Accelerated Share Repurchases Cash Or Stock Settlement AcceleratedShareRepurchasesCashOrStockSettlement	2.1 million
CY2021Q1	us-gaap	Accelerated Share Repurchases Settlement Payment Or Receipt AcceleratedShareRepurchasesSettlementPaymentOrReceipt	400000000	USD
CY2021Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	194.91
CY2021Q2	ffiv	Adjustments To Additional Paid In Capital Equity Forward Contract AdjustmentsToAdditionalPaidInCapitalEquityForwardContract	100000000	USD
CY2021Q2	us-gaap	Accelerated Share Repurchases Cash Or Stock Settlement AcceleratedShareRepurchasesCashOrStockSettlement	449,049
	us-gaap	Accelerated Share Repurchases Cash Or Stock Settlement AcceleratedShareRepurchasesCashOrStockSettlement	2.5 million
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	199.90
CY2021Q3	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	773000000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	243300000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	201900000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	162900000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	44100000	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	145.89
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	37600000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	31300000	USD
CY2021Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	220700000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y6M
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y6M
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y6M
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	165.64
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	261900000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	138400000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	159600000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	391100	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	36.71
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	145360	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	14.84
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	163880	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	29.68
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	47956	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	34.21
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	324624	shares
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.83
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	25600000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	11400000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	700000	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	324624	shares
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y2M8D
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.83
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	54520000	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	158544	shares
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y8M1D
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	28.15
CY2021Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	27052000	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	313777	shares
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P7Y1M28D
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	30.53
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	52794000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	331241000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	307441000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	427734000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60707000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60911000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60044000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1350000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	467000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	412000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62057000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61378000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	60456000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.46
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.05
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.12
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.34
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.01
CY2021	ffiv	Numberof Geographic Regions NumberofGeographicRegions	3	geographic_region
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.08
CY2020Q4	ffiv	Numberof Employeesin Reductionof Force Program NumberofEmployeesinReductionofForceProgram	75	employee
CY2020Q4	us-gaap	Restructuring Charges RestructuringCharges	7800000	USD
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	13200000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	11300000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	10500000	USD
CY2020	ffiv	Defined Contribution Plan Employer Contribution Vesting Period DefinedContributionPlanEmployerContributionVestingPeriod	P4Y
CY2019	ffiv	Defined Contribution Plan Employer Contribution Vesting Period DefinedContributionPlanEmployerContributionVestingPeriod	P4Y
CY2021	ffiv	Defined Contribution Plan Employer Contribution Vesting Period DefinedContributionPlanEmployerContributionVestingPeriod	P4Y
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020	ffiv	Numberof Geographic Regions NumberofGeographicRegions	3	geographic_region
CY2019	ffiv	Numberof Geographic Regions NumberofGeographicRegions	3	geographic_region
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2603416000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2350822000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2242447000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	191164000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	229239000	USD

Files In Submission

Name	View Source	Status
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0001048695-21-000044-index.html	Edgar Link	pending
0001048695-21-000044.txt	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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$FFIV
F5, INC. Stock $ffiv

2021 Q3 Form 10-K Financial Statement

#000104869521000044 Filed on November 16, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FFIV F5, INC. Stock $ffiv

2021 Q3 Form 10-K Financial Statement

#000104869521000044 Filed on November 16, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FFIV
F5, INC. Stock $ffiv