Statement Of Changes In Equity [Abstract]

Alfen N.V. - Filing #1865426

Concept	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through appropriation of retained earnings, equity	21,450,000 EUR	— EUR	—	21,450,000 EUR	11,987,000 EUR	—	— EUR	11,987,000 EUR
Purchase of treasury shares	—	222,000 EUR	222,000 EUR	—	—	— EUR	— EUR	—