Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
166,000,000
EUR
|
155,300,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
38,200,000
EUR
|
36,500,000
EUR
|
— |
| Goodwill |
180,800,000
EUR
|
180. 7
EUR
|
— |
| Intangible assets and goodwill |
219,000,000
EUR
|
21 7 .2
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
1 7. 6
EUR
|
14,000,000
EUR
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
1,500,000
EUR
|
1,900,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
85,900,000
EUR
|
91,000,000
EUR
|
— |
| Other current receivables |
7. 9
EUR
|
11,000,000
EUR
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Current contract assets |
30,800,000
EUR
|
30,800,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
7. 8
EUR
|
7. 8
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
32,900,000
EUR
|
49,500,000
EUR
|
28,600,000
EUR
|
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
1 72.8
EUR
|
1 70.5
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
1,200,000
EUR
|
1,200,000
EUR
|
— |
| Other non-current liabilities |
13,200,000
EUR
|
13,300,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
19,400,000
EUR
|
19,400,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
223,600,000
EUR
|
211,000,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
649,900,000
EUR
|
660,500,000
EUR
|
— |
| Liabilities |
4 1 7. 7
EUR
|
440,100,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
166,500,000
EUR
|
198,800,000
EUR
|
— |
| Current liabilities |
196,100,000
EUR
|
212,600,000
EUR
|
— |
| Assets less current liabilities [abstract] |