Income Tax - Summary of Accumulated Tax Losses (Details) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Taxes [Abstract] | |||
| Corporate tax | € 2,604.0 | € 1,236.7 | € 260.7 |
| Trade tax | 2,077.1 | 989.6 | 140.1 |
| Federal tax credits | 27.3 | 25.4 | 21.3 |
| State tax credits | € 8.9 | € 7.1 | € 8.7 |