Statement Of Changes In Equity [Abstract]

Koninklijke BAM Groep N.V. - Filing #5830023

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	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	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 transactions with owners, equity	296,000 EUR	88,952,000 EUR	- EUR	- EUR	- EUR	88,656,000 EUR	88,656,000 EUR	- EUR	37,157,000 EUR	2,469,000 EUR	- EUR	39,626,000 EUR	- EUR	39,626,000 EUR
Purchase of treasury shares	- EUR	65,525,000 EUR	- EUR	- EUR	- EUR	65,525,000 EUR	65,525,000 EUR	- EUR	19,835,000 EUR	- EUR	- EUR	19,835,000 EUR	- EUR	19,835,000 EUR