Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
19,100,000
EUR
|
17,600,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
56,400,000
EUR
|
47,700,000
EUR
|
— |
| Goodwill |
442,500,000
EUR
|
369,900,000
EUR
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements |
100,000
EUR
|
1,500,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
1,100,000
EUR
|
1,300,000
EUR
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
8,400,000
EUR
|
9,600,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
379,600,000
EUR
|
346,000,000
EUR
|
— |
| Other current receivables |
32,100,000
EUR
|
34,400,000
EUR
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Current contract assets |
231,300,000
EUR
|
195,600,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
22,300,000
EUR
|
16,900,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
81,200,000
EUR
|
130,900,000
EUR
|
149,300,000
EUR
|
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
198,500,000
EUR
|
167,400,000
EUR
|
— |
| Trade and other payables [abstract] | |||
| Accruals and deferred income including contract liabilities [abstract] | |||
| Deferred income including contract liabilities [abstract] | |||
| Contract liabilities [abstract] | |||
| Advances received, representing contract liabilities for performance obligations satisfied at point in time |
286,200,000
EUR
|
261,300,000
EUR
|
— |
| Miscellaneous liabilities [abstract] | |||
| Net defined benefit liability |
41,900,000
EUR
|
50,600,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
1,000,000
EUR
|
1,000,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
135,100,000
EUR
|
107,600,000
EUR
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Revaluation surplus |
300,000
EUR
|
200,000
EUR
|
— |
| Reserve of exchange differences on translation |
9,600,000
EUR
|
6,000,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1,424,700,000
EUR
|
1,320,000,000
EUR
|
— |
| Liabilities |
1,199,300,000
EUR
|
1,118,600,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
749,400,000
EUR
|
724,400,000
EUR
|
— |
| Current liabilities |
876,200,000
EUR
|
789,400,000
EUR
|
— |
| Assets less current liabilities [abstract] |