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 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 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 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment |
3,700,000
EUR
|
— | — | — | — | — | — | — |
3,600,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
37,000,000
EUR
|
— | — | — | — | — | — | — |
30,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
298,000,000
EUR
|
— | — | — | — | — | — | — |
294,400,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
200,000
EUR
|
— | — | — | — | — | — | — |
600,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other non-current financial assets |
5,900,000
EUR
|
— | — | — | — | — | — | — |
8,800,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
437,400,000
EUR
|
— | — | — | — | — | — | — |
429,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||
| Current tax assets, current |
2,800,000
EUR
|
— | — | — | — | — | — | — |
100,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other current financial assets |
1,100,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
52,400,000
EUR
|
— | — | — | — | — | — | — |
30,000,000
EUR
|
— | — | — | — | — | — | — | — |
51,900,000
EUR
|
— | — | — | — | — | — |
| Current assets |
90,300,000
EUR
|
— | — | — | — | — | — | — |
64,800,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
527,700,000
EUR
|
— | — | — | — | — | — | — |
493,800,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital |
45,300,000
EUR
|
— | — | — | — | — | — | — |
45,300,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
147,700,000
EUR
|
— | — | — | — | — | — | — |
131,700,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
7,700,000
EUR
|
— | — | — | — | — | — | — |
7,700,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
220,300,000
EUR
|
— | — | — | — | — | — | — |
204,400,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
2,500,000
EUR
|
— | — | — | — | — | — | — |
1,500,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
222,800,000
EUR
|
147,700,000
EUR
|
2,500,000
EUR
|
7,700,000
EUR
|
45,300,000
EUR
|
500,000
EUR
|
220,300,000
EUR
|
19,100,000
EUR
|
205,900,000
EUR
|
1,500,000
EUR
|
7,700,000
EUR
|
131,700,000
EUR
|
45,300,000
EUR
|
600,000
EUR
|
204,500,000
EUR
|
19,100,000
EUR
|
91,200,000
EUR
|
166,500,000
EUR
|
19,100,000
EUR
|
163,600,000
EUR
|
7,700,000
EUR
|
2,900,000
EUR
|
300,000
EUR
|
45,300,000
EUR
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||
| Non-current provisions for employee benefits |
500,000
EUR
|
— | — | — | — | — | — | — |
600,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
17,000,000
EUR
|
— | — | — | — | — | — | — |
17,200,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
215,900,000
EUR
|
— | — | — | — | — | — | — |
191,200,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||
| Current liabilities |
89,100,000
EUR
|
— | — | — | — | — | — | — |
96,700,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
305,000,000
EUR
|
— | — | — | — | — | — | — |
287,800,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
527,700,000
EUR
|
— | — | — | — | — | — | — |
493,800,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |