Statement Of Cash Flows [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||
| Cash flows from (used in) operating activities [abstract] | |||||||
| Other inflows (outflows) of cash, classified as operating activities |
8,200,000
EUR
|
— | — |
30,700,000
EUR
|
— | — | — |
| Cash flows from (used in) operating activities |
36,100,000
EUR
|
— | — |
74,100,000
EUR
|
— | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities |
300,000
EUR
|
— | — |
1,800,000
EUR
|
— | — | — |
| Interest received, classified as investing activities |
200,000
EUR
|
— | — |
200,000
EUR
|
— | — | — |
| Cash flows from (used in) investing activities |
43,200,000
EUR
|
— | — |
58,600,000
EUR
|
— | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||
| Proceeds from issuing shares |
0
EUR
|
— | — |
89,700,000
EUR
|
— | — | — |
| Payments to acquire or redeem entity's shares |
0
EUR
|
— | — |
1,300,000
EUR
|
— | — | — |
| Payments of lease liabilities, classified as financing activities |
15,000,000
EUR
|
— | — |
13,500,000
EUR
|
— | — | — |
| Cash flows from (used in) financing activities |
20,300,000
EUR
|
— | — |
41,600,000
EUR
|
— | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||
| Effect of exchange rate changes on cash and cash equivalents |
18,300,000
EUR
|
— | — |
14,900,000
EUR
|
— | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes |
9,100,000
EUR
|
— | — |
42,200,000
EUR
|
— | — | — |
| Cash and cash equivalents | — |
51,300,000
EUR
|
58,300,000
EUR
|
— |
67,400,000
EUR
|
67,400,000
EUR
|
25,200,000
EUR
|