Statement Of Changes In Equity [Abstract]

Alfen N.V. - Filing #5830027

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	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	2023-01-01 to 2023-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through appropriation of retained earnings, equity	— EUR	— EUR	— EUR	29,684,000 EUR	29,684,000 EUR	— EUR	— EUR	53,047,000 EUR	53,047,000 EUR	— EUR
Purchase of treasury shares	827,000 EUR	— EUR	827,000 EUR	— EUR	— EUR	— EUR	1,708,000 EUR	— EUR	— EUR	1,708,000 EUR