Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Land and buildings [abstract] | |||
| Land and buildings |
220,600,000
EUR
|
244,600,000
EUR
|
— |
| Construction in progress |
6,500,000
EUR
|
35,900,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Other intangible assets |
125,500,000
EUR
|
142,800,000
EUR
|
— |
| Goodwill |
205,400,000
EUR
|
244,500,000
EUR
|
— |
| Intangible assets and goodwill |
330,900,000
EUR
|
387,300,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in associates accounted for using equity method |
9,000,000
EUR
|
11,400,000
EUR
|
— |
| Trade and other non-current receivables [abstract] | |||
| Non-current receivables due from related parties | — | — | — |
| Non-current receivables due from associates |
0
EUR
|
0
EUR
|
— |
| Other non-current receivables |
100,000
EUR
|
0
EUR
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
1,900,000
EUR
|
2,800,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Other current receivables |
15,000,000
EUR
|
11,800,000
EUR
|
— |
| Trade and other current receivables |
139,900,000
EUR
|
223,600,000
EUR
|
— |
| Trade and other receivables [abstract] | |||
| Trade receivables |
63,200,000
EUR
|
129,300,000
EUR
|
— |
| Prepayments and accrued income including contract assets [abstract] | |||
| Prepayments and accrued income including contract assets |
21,400,000
EUR
|
14,200,000
EUR
|
— |
| Categories of financial assets [abstract] | |||
| Financial assets |
11,000,000
EUR
|
14,800,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current raw materials and current production supplies [abstract] | |||
| Current raw materials and current production supplies |
29,800,000
EUR
|
46,000,000
EUR
|
— |
| Current work in progress |
6,700,000
EUR
|
4,800,000
EUR
|
— |
| Current finished goods |
43,100,000
EUR
|
81,900,000
EUR
|
— |
| Current inventories |
79,600,000
EUR
|
132,600,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
36,800,000
EUR
|
63,600,000
EUR
|
47,500,000
EUR
|
| Classes of other provisions [abstract] | |||
| Other provisions [abstract] | |||
| Other provisions |
-
EUR
|
2,500,000
EUR
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Non-current portion of non-current bonds issued |
249,400,000
EUR
|
247,900,000
EUR
|
— |
| Trade and other payables [abstract] | |||
| Trade payables |
47,800,000
EUR
|
81,600,000
EUR
|
— |
| Accruals and deferred income including contract liabilities [abstract] | |||
| Accruals and deferred income including contract liabilities |
52,500,000
EUR
|
60,400,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
17,100,000
EUR
|
14,600,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
18,300,000
EUR
|
18,300,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
46,300,000
EUR
|
76,500,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Additional paid-in capital |
323,000,000
EUR
|
323,000,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1 182.0
EUR
|
1 253.4
EUR
|
— |
| Liabilities |
797,400,000
EUR
|
837,700,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
356,200,000
EUR
|
405,700,000
EUR
|
— |
| Current liabilities |
155,100,000
EUR
|
204,800,000
EUR
|
— |
| Assets less current liabilities [abstract] |