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v3.22.4

Summary of significant accounting policies, Segment reporting (Details) | 12 Months Ended
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Dec. 31, 2022 segment
Segment reporting [Abstract] |
Number of operating segments | 1
Number of reportable segments | 1

X
- Definition Number of operating segments reported by the entity. + References No definition available. + Details
Name: | aciu_OperatingSegmentsNumber
Namespace Prefix: | aciu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of reportable segments reported by the entity. + References No definition available. + Details
Name: | aciu_ReportableSegmentsNumber
Namespace Prefix: | aciu_
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