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Share-based payments - Summary of performance shares (Details)
12 Months Ended
Dec. 31, 2025
shares
Expired performance shares  
Performance shares [Line Items]  
Type Cash-settled share-based payment
Performance conditions Relative stock price linked (20.0%), management index (80.0%)
Operating period 4 years from the commencement date of the year to which the grant date belongs
Estimated number of shares vested at December 31, 2025 880,880
Not Expired performance shares  
Performance shares [Line Items]  
Type Cash-settled share-based payment
Performance conditions Relative stock price linked (20.0%), management index (80.0%)
Operating period 4 years from the commencement date of the year to which the grant date belongs
Estimated number of shares vested at December 31, 2025 2,069,238