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Consolidated shareholders' equity - Summary of stock subscription option plans (Details) - Stock option plan | 6 Months Ended
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Jun. 30, 2026 shares € / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Number of options, outstanding (in shares) | shares | 639,194
Number of options, exercisable (in shares) | shares | 639,194
From €60.00 to €70.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Number of options, outstanding (in shares) | shares | 168,784
Weighted average residual life (years) | 1 year 10 months 2 days
Weighted average exercise price per share, outstanding (in euros per share) | € 65.84
Number of options, exercisable (in shares) | shares | 168,784
Weighted average exercise price per share, exercisable (in euros per share) | € 65.84
From €70.00 to €80.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Number of options, outstanding (in shares) | shares | 213,400
Weighted average residual life (years) | 2 years 10 months 2 days
Weighted average exercise price per share, outstanding (in euros per share) | € 76.71
Number of options, exercisable (in shares) | shares | 213,400
Weighted average exercise price per share, exercisable (in euros per share) | € 76.71
From €80.00 to €90.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Number of options, outstanding (in shares) | shares | 257,010
Weighted average residual life (years) | 10 months 9 days
Weighted average exercise price per share, outstanding (in euros per share) | € 88.97
Number of options, exercisable (in shares) | shares | 257,010
Weighted average exercise price per share, exercisable (in euros per share) | € 88.97
Bottom of range | From €60.00 to €70.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Exercise price of outstanding options (in euros per share) | 60.00
Bottom of range | From €70.00 to €80.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Exercise price of outstanding options (in euros per share) | 70.00
Bottom of range | From €80.00 to €90.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Exercise price of outstanding options (in euros per share) | 80.00
Top of range | From €60.00 to €70.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Exercise price of outstanding options (in euros per share) | 70.00
Top of range | From €70.00 to €80.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Exercise price of outstanding options (in euros per share) | 80.00
Top of range | From €80.00 to €90.00 per share |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Exercise price of outstanding options (in euros per share) | € 90.00

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