Statement Of Changes In Equity [Abstract]

Alfen N.V. - Filing #2154182

Concept	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	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	2022-01-01 to 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through appropriation of retained earnings, equity	— EUR	— EUR	53,047,000 EUR	53,047,000 EUR	— EUR	— EUR	21,450,000 EUR	— EUR	— EUR	21,450,000 EUR
Purchase of treasury shares	— EUR	1,708,000 EUR	— EUR	— EUR	1,708,000 EUR	— EUR	— EUR	222,000 EUR	222,000 EUR	— EUR