v3.25.4
Share-based compensation - Options on EUR/USD-denominated listed share (Detail)
 12 Months Ended
Dec. 31, 2025
shares
€ / shares
Dec. 31, 2024
shares
€ / shares
EUR    
Share-based compensation [Line Items]    
Number of share options outstanding in share-based payment arrangement at beginning of period (in shares) | shares 3,396,539 3,660,000
Weighted average exercise price of share options outstanding in share-based payment arrangement at beginning of period (in EUR per share) | € / shares € 22.16 € 22.16
Number of share options exercised in share-based payment arrangement (in shares) | shares (378,515) (3,793)
Weighted average exercise price of share options exercised in share-based payment arrangement (in EUR per share) | € / shares € 22.16 € 22.16
Number of share options forfeited in share-based payment arrangement (in shares) | shares (11,548) (259,668)
Weighted average exercise price of share options forfeited (in EUR per share) | € / shares € 22.16 € 22.16
Number of share options expired in share-based payment arrangement (in shares) | shares (39,983) 0
Weighted average exercise price of share options expired in share-based payment arrangement (in EUR per share) | € / shares € 22.16 € 0
Number of share options outstanding in share-based payment arrangement at end of period (in shares) | shares 2,966,493 3,396,539
Weighted average exercise price of share options outstanding in share-based payment arrangement at end of period (in EUR per share) | € / shares € 22.16 € 22.16
US Dollar    
Share-based compensation [Line Items]    
Number of share options outstanding in share-based payment arrangement at beginning of period (in shares) | shares 1,637,764 1,929,000
Weighted average exercise price of share options outstanding in share-based payment arrangement at beginning of period (in EUR per share) | € / shares € 24.42 € 24.42
Number of share options exercised in share-based payment arrangement (in shares) | shares (201,873) 0
Weighted average exercise price of share options exercised in share-based payment arrangement (in EUR per share) | € / shares € 24.42 € 0
Number of share options forfeited in share-based payment arrangement (in shares) | shares (54,248) (291,236)
Weighted average exercise price of share options forfeited (in EUR per share) | € / shares € 24.42 € 24.42
Number of share options outstanding in share-based payment arrangement at end of period (in shares) | shares 1,381,643 1,637,764
Weighted average exercise price of share options outstanding in share-based payment arrangement at end of period (in EUR per share) | € / shares € 24.42 € 24.42