XML 95 R80.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Stock-Based Compensation - Schedule of Nonvested Restricted Stock Units Activity (Details) - shares | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting period | 2 years | 2 years | 2 years
Annual Equity Program [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage Of Annual Performance Stock Grant Vests In Equal Quarterly Increments | 50.00% |  |
Percentage Of Annual Performance Stock Grant Based On Achieving Specified Annual Performance Goals | 50.00% |  |
Annual Equity Program [Member] | CEO |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage Of Annual Performance Stock Grant Vests In Equal Quarterly Increments | 40.00% |  |
Percentage Of Annual Performance Stock Grant Based On Achieving Specified Annual Performance Goals | 60.00% |  |
Annual Equity Program [Member] | November 1, 2021 | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Equity Instruments Other than Options, Grants in Period | 160,384 |  |
Award vesting period | 3 years |  |
Annual Equity Program [Member] | November 2, 2020 | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Equity Instruments Other than Options, Grants in Period | 257,568 |  |
Award vesting period | 3 years |  |
Annual Equity Program [Member] | November 1, 2019 [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Equity Instruments Other than Options, Grants in Period | 228,616 |  |
Award vesting period | 3 years |  |
Annual Equity Program [Member] | November 1, 2018 [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Equity Instruments Other than Options, Grants in Period | 144,066 |  |
Award vesting period | 3 years |  |

X
- Definition Percentage Of Annual Performance Stock Grant Based On Achieving Specified Annual Performance Goals + References No definition available. + Details
Name: | ffiv_PercentageOfAnnualPerformanceStockGrantBasedOnAchievingSpecifiedAnnualPerformanceGoals
Namespace Prefix: | ffiv_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Annual Performance Stock Grant Vests In Equal Quarterly Increments + References No definition available. + Details
Name: | ffiv_PercentageOfAnnualPerformanceStockGrantVestsInEqualQuarterlyIncrements
Namespace Prefix: | ffiv_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=ffiv_AnnualEquityProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ffiv_ExecutiveTypeAxis=ffiv_CEOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardDateAxis=ffiv_November12021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardDateAxis=ffiv_November22020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardDateAxis=ffiv_November12019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardDateAxis=ffiv_November12018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |