Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — |
166,000,000
EUR
|
— | — |
155,300,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
76,000,000
EUR
|
— | — |
71,200,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Goodwill | — | — | — |
180,800,000
EUR
|
— | — |
180. 7
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — | — |
38,200,000
EUR
|
— | — |
36,500,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method | — | — | — |
1 7. 6
EUR
|
— | — |
14,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
3,100,000
EUR
|
— | — |
1,900,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
32,900,000
EUR
|
— | — |
49,500,000
EUR
|
— | — | — | — | — |
28,600,000
EUR
|
— | — | — | — | — |
| Assets | — | — | — |
649,900,000
EUR
|
— | — |
660,500,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — |
19,400,000
EUR
|
— | — |
19,400,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
223,600,000
EUR
|
— | — |
211,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — |
11,500,000
EUR
|
— | — |
10,600,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
19,400,000
EUR
|
11,500,000
EUR
|
223,600,000
EUR
|
232,200,000
EUR
|
600,000
EUR
|
-
EUR
|
220,400,000
EUR
|
211,000,000
EUR
|
19,400,000
EUR
|
11,500,000
EUR
|
900,000
EUR
|
600,000
EUR
|
210,400,000
EUR
|
196. 7
EUR
|
400,000
EUR
|
600,000
EUR
|
5,900,000
EUR
|
19,400,000
EUR
|
| Liabilities [abstract] | ||||||||||||||||||
| Deferred tax liabilities | — | — | — |
28,500,000
EUR
|
— | — |
28,100,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
4 1 7. 7
EUR
|
— | — |
440,100,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
649,900,000
EUR
|
— | — |
660,500,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |