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FINANCIAL RISK MANAGEMENT - CREDIT RISK (Details) - Credit risk | 12 Months Ended
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Dec. 31, 2025 item
Largest single customer |
CREDIT RISK |
Percentage of entities receivables | 10.00%
Largest 20 combined customers |
CREDIT RISK |
Percentage of entities receivables | 32.00%
Number of largest customers | 20

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- Definition Number of major customers of the company. + References No definition available. + Details
Name: | as_NumberOfMajorCustomers
Namespace Prefix: | as_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage of the entity's accounts receivables. + References No definition available. + Details
Name: | as_PercentageOfEntitiesReceivables
Namespace Prefix: | as_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- 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_DisclosureOfCreditRiskExposureLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_MajorCustomersAxis=as_LargestSingleCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CreditRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_MajorCustomersAxis=as_LargestTwentyCombinedCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |