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] | |||
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
22,112,000
EUR
|
23,363,000
EUR
|
— |
| Goodwill |
30,016,000
EUR
|
32,299,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
820,000,000
EUR
|
850,000,000
EUR
|
— |
| Trade and other receivables [abstract] | |||
| Trade receivables |
8,966,000
EUR
|
9,343,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
13,467,000
EUR
|
13,947,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
6,191,000
EUR
|
5,907,000
EUR
|
5,171,000
EUR
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners |
22,000,000
EUR
|
51,000,000
EUR
|
— |
| Classes of other provisions [abstract] | |||
| Refunds provision [abstract] | |||
| Non-current refunds provision |
9,000,000
EUR
|
14,000,000
EUR
|
— |
| Current refunds provision |
5,905,000
EUR
|
5,463,000
EUR
|
— |
| Miscellaneous other provisions [abstract] | |||
| Non-current miscellaneous other provisions |
7,396,000
EUR
|
7,784,000
EUR
|
— |
| Current miscellaneous other provisions |
3,808,000
EUR
|
3,241,000
EUR
|
— |
| Trade and other non-current payables [abstract] | |||
| Non-current accruals and non-current deferred income including non-current contract liabilities [abstract] | |||
| Non-current deferred income including non-current contract liabilities [abstract] | |||
| Non-current contract liabilities [abstract] | |||
| Non-current contract liabilities |
303,000,000
EUR
|
436,000,000
EUR
|
— |
| Trade and other current payables [abstract] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities [abstract] | |||
| Current contract liabilities [abstract] | |||
| Current contract liabilities |
3,652,000
EUR
|
3,856,000
EUR
|
— |
| Trade and other current payables |
7,518,000
EUR
|
7,456,000
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
3,312,000
EUR
|
4,014,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
2,515,000
EUR
|
2,515,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
110,850,000
EUR
|
116,259,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
34,444,000
EUR
|
37,556,000
EUR
|
— |
| Current liabilities |
28,952,000
EUR
|
29,457,000
EUR
|
— |
| Assets less current liabilities [abstract] |