v3.25.4

Subsequent Events - Additional Information (Detail) $ in Millions | Jan. 09, 2026 USD ($)
--- | ---
Events After Reporting Period [member] |
Disclosure of non-adjusting events after reporting period [line items] |
Share repurchase program authorized amount | $ 120

X
- Definition Stock repurchase program authorized. + References No definition available. + Details
Name: | asnd_StockRepurchaseProgramAuthorized
Namespace Prefix: | asnd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=asnd_EventsAfterReportingPeriodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |