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Segment information (Details) - segment
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of geographical areas [line items]    
Number of operating segments 1  
United States | Top of range    
Disclosure of geographical areas [line items]    
Contribution to Group's assets, percentage 10.00% 10.00%
Contribution to Group's liabilities, percentage 10.00% 10.00%
Contribution to Group's net profits (losses), percentage 10.00% 10.00%