Earnings per Share - Summary of Income and Share Data Used in the Basic and diluted EPS Calculations (Details) - EUR (€) € / shares in Units, € in Millions, shares in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Earnings per share [abstract] | |||
| Profit attributable to ordinary equity holders of the parent for basic earnings | € (1,136.1) | € (665.3) | € 930.3 |
| Weighted average number of ordinary shares outstanding for basic EPS (in shares) | 241.7 | 240.4 | 240.6 |
| Effects of dilution from share options (in shares) | 0.0 | 0.0 | 2.1 |
| Weighted average number of ordinary shares outstanding adjusted for the effect of dilution (in shares) | 241.7 | 240.4 | 242.7 |
| Earnings / (Loss) per share | |||
| Basic profit for the period per share (in euros per share) | € (4.70) | € (2.77) | € 3.87 |
| Diluted profit for the period per share (in euros per share) | € (4.70) | € (2.77) | € 3.83 |