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SUMMARY OF MATERIAL ACCOUNTING POLICIES - Segment information (Details) | 12 Months Ended
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Dec. 31, 2025 area
SIGNIFICANT ACCOUNTING POLICIES |
Number of geographical areas reporting revenue | 4

X
- Definition The number of geographical areas reporting revenue. + References No definition available. + Details
Name: | as_NumberOfGeographicalAreasReportingRevenue
Namespace Prefix: | as_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Not applicable. + References No definition available. + Details
Name: | as_SignificantAccountingPoliciesDisclosureAbstract
Namespace Prefix: | as_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration