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COMMITMENTS (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Capital commitments [abstract]
Guarantees	$ 21.5	$ 36.5
Other commitments	$ 319.5	$ 339.5

X

- Definition

The amount of guarantees made by the entity.

+ References

No definition available.

+ Details

Name:	as_Guarantees
Namespace Prefix:	as_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of other commitments made by the entity.

+ References

No definition available.

+ Details

Name:	as_OtherCommitments
Namespace Prefix:	as_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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