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FINANCIAL RISK MANAGEMENT - CREDIT RISK (Details) - Credit risk	12 Months Ended
	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

X

- 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

X

- 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

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

X

- Details

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

X

- Details

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

X

- Details

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