v3.26.1

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Capital commitments [abstract]
Guarantees	$ 22.3	$ 21.5
Other commitments	$ 356.3	$ 319.5

The amount of guarantees made by the entity.

No definition available.

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

The amount of other commitments made by the entity.

No definition available.

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

No definition available.

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