Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||
| Statement of changes in equity [line items] | ||||||
| Increase (decrease) through exercise of options, equity | — |
128,000
EUR
|
128,000
EUR
|
120,000
EUR
|
120,000
EUR
|
— |
| Purchase of treasury shares |
2,823,000
EUR
|
2,823,000
EUR
|
— | — |
1,505,000
EUR
|
1,505,000
EUR
|