Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Property, plant and equipment [abstract] | ||||
| Property, plant and equipment |
50,528,000
EUR
|
86,455,000
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets other than goodwill [abstract] | ||||
| Intangible assets other than goodwill |
0
EUR
|
53,790,000
EUR
|
— | — |
| Trade and other non-current receivables [abstract] | ||||
| Trade and other non-current receivables |
18,105,000
EUR
|
29,094,000
EUR
|
— | — |
| Miscellaneous non-current assets [abstract] | ||||
| Non-current investments other than investments accounted for using equity method |
30,943,000
EUR
|
26,907,000
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||
| Trade and other current receivables |
115,622,000
EUR
|
153,453,000
EUR
|
— | — |
| Classes of current inventories [abstract] | ||||
| Current inventories |
1,286,000
EUR
|
118,436,000
EUR
|
— | — |
| Classes of current inventories, alternative [abstract] | ||||
| Cash and cash equivalents [abstract] | ||||
| Cash and cash equivalents |
1,069,234,000
EUR
|
1,129,103,000
EUR
|
960,221,000
EUR
|
1,081,060,000
EUR
|
| Borrowings [abstract] | ||||
| Non-current portion of non-current borrowings |
401,346,000
EUR
|
647,906,000
EUR
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | ||||
| 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 deferred income including non-current contract liabilities |
0
EUR
|
14,551,000
EUR
|
— | — |
| Trade and other non-current payables |
19,058,000
EUR
|
18,426,000
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 deferred income including current contract liabilities |
0
EUR
|
53,033,000
EUR
|
— | — |
| Trade and other current payables |
180,762,000
EUR
|
266,387,000
EUR
|
— | — |
| Issued capital [abstract] | ||||
| Issued capital |
51,702,000
EUR
|
43,634,000
EUR
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||
| Reserve of exchange differences on translation |
14,617,000
EUR
|
14,155,000
EUR
|
— | — |
| Net assets (liabilities) [abstract] | ||||
| Assets |
1,539,806,000
EUR
|
2,067,629,000
EUR
|
— | — |
| Liabilities |
723,895,000
EUR
|
1,139,826,000
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||
| Current assets |
1,316,352,000
EUR
|
1,721,596,000
EUR
|
— | — |
| Current liabilities |
195,491,000
EUR
|
334,317,000
EUR
|
— | — |
| Assets less current liabilities [abstract] |