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Financial Assets and Financial Liabilities - Summary of Significant Unobservable Inputs (Level 3) Used for Recurring Fair Value Measurements and the Effect of the Measurements (Details) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2021
Liabilities [Roll Forward] |  |
As of January 1, 2022 | € 2,760.4 |
As of January 1, 2023 | 3,223.5 |
As of December 31, 2023 | 2,760.4 |
Level 3 (Fair value) | Contingent consideration |  |
Liabilities [Roll Forward] |  |
As of January 1, 2022 | 38.8 | € 6.1
As of January 1, 2023 | 6.1 |
Purchases | 31.8 |
Net change in fair value | 0.9 |
As of December 31, 2023 | € 38.8 |

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