XML 112 R94.htm IDEA: XBRL DOCUMENT v3.25.3

Segment Information - Narrative (Details) - geographic_region	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Number of Geographic Regions	3	3	3

X

- Definition

Number of Geographic Regions

+ References

No definition available.

+ Details

Name:	ffiv_NumberofGeographicRegions
Namespace Prefix:	ffiv_
Data Type:	xbrli:integerItemType
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_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration