RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disclosure of transactions between related parties [line items] | ||||
| Interest cost on interest bearing debt | $ 22,000,000.0 | $ 36,900,000 | $ 36,600,000 | $ 78,900,000 |
| Unsecured investment loan | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Interest cost on interest bearing debt | 0 | 0 | 0 | |
| Unsecured investment loan | Parent company (Amer Sports Holding (Cayman) Limited) | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Interest cost on interest bearing debt | 19,100,000 | |||
| Unsecured facility a loan | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Interest cost on interest bearing debt | $ 0 | $ 0 | $ 0 | |
| Unsecured facility a loan | Parent company (Amer Sports Holding (Cayman) Limited) | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Interest cost on interest bearing debt | $ 2,500,000 | |||