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RELATED PARTIES - Schedule of Amer Sports Holding (Cayman) Limited transactions (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of transactions between related parties [line items] |  |  |
Total | $ 62.1 | $ 174.2 | $ 158.9
Parent company (Amer Sports Holding (Cayman) Limited) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Total | 0.0 | 21.6 | 226.4
Parent company (Amer Sports Holding (Cayman) Limited) | Investment Loan |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Total | 0.0 | 19.1 | 205.0
Parent company (Amer Sports Holding (Cayman) Limited) | Facility A Loan |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Total | $ 0.0 | $ 2.5 | $ 21.4

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- References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard -URIDate 2025-03-27 + Details
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