v3.26.1
RELATED PARTY TRANSACTIONS - Narrative (Details)
1 Months Ended
May 01, 2026
USD ($)
Mar. 20, 2026
USD ($)
ft²
May 31, 2026
USD ($)
Amer Sports Asia Services Limited      
Disclosure of transactions between related parties [line items]      
Nominal consideration $ 1    
Contract period agreement 1 year    
Extension period 1 year    
Lease, notice period 90 days    
Reimbursement amount     $ 1,600,000
Entity controlled by a member of the board of directors of Amer Sports, Inc.      
Disclosure of transactions between related parties [line items]      
Extension period   5 years  
Area of real estate property | ft²   21,100  
Entity controlled by a member of the board of directors of Amer Sports, Inc. | Bottom of range      
Disclosure of transactions between related parties [line items]      
Future minimum payments   $ 600,000  
Entity controlled by a member of the board of directors of Amer Sports, Inc. | Top of range      
Disclosure of transactions between related parties [line items]      
Future minimum payments   $ 800,000