| Document and Entity Information | 9 Months Ended |
| Sep. 30, 2024 | |
| Cover [Abstract] | |
| Document Type | 6-K |
| Entity File Number | 001-41943 |
| Entity Registrant Name | Amer Sports, Inc. |
| Entity Address, Address Line One | Cricket Square, Hutchins Drive |
| Entity Address, Address Line Two | P.O. Box 2681 |
| Entity Address, City or Town | Grand Cayman |
| Entity Address, Postal Zip Code | KY1-1111 |
| Entity Address, Country | KY |
| Entity Central Index Key | 0001988894 |
| Amendment Flag | false |
| Current Fiscal Year End Date | --12-31 |
| Document Period End Date | Sep. 30, 2024 |
| Document Fiscal Period Focus | Q3 |
| Document Fiscal Year Focus | 2024 |
