v3.25.3
Segment Information - Additional Information (Details) - Segment
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Disclosure of operating segments [abstract]
Number of operating segment
3
4
Number of reportable segments
3
3
X
- Definition
Number of operating segment.
+ References
No definition available.
+ Details
Name:
birk_NumberOfOperatingSegment
Namespace Prefix:
birk_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Number of reportable segments 1.
+ References
No definition available.
+ Details
Name:
birk_NumberOfReportableSegments1
Namespace Prefix:
birk_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix:
ifrs-full_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration