Statement Of Changes In Equity [Abstract]

Koninklijke BAM Groep N.V. - Filing #5830023

Concept	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	122,395,000 EUR	—	26,000 EUR	66,217,000 EUR	—	—	895,513,000 EUR	—	—	24,000 EUR	—	895,539,000 EUR	839,311,000 EUR	—	920,819,000 EUR	—	141,538,000 EUR	—	—	324,000 EUR	—	86,723,000 EUR	920,495,000 EUR	26,369,000 EUR	—	—	839,311,000 EUR	808,484,000 EUR	2,106,000 EUR	41,941,000 EUR	105,167,000 EUR	810,590,000 EUR	34,505,000 EUR	839,311,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	82,248,000 EUR	—	- EUR	—	—	82,248,000 EUR	13,000 EUR	—	82,235,000 EUR	- EUR	—	- EUR	—	—	174,954,000 EUR	—	174,991,000 EUR	—	37,000 EUR	174,991,000 EUR	—	- EUR	—	—	—	- EUR	- EUR	—	—	—	—	—	—	—	—
Other comprehensive income	18,574,000 EUR	—	20,506,000 EUR	—	—	12,735,000 EUR	11,000 EUR	—	18,563,000 EUR	26,345,000 EUR	—	- EUR	—	—	25,462,000 EUR	—	25,460,000 EUR	—	2,000 EUR	35,768,000 EUR	—	18,444,000 EUR	—	—	—	8,136,000 EUR	- EUR	—	—	—	—	—	—	—	—
Comprehensive income	63,674,000 EUR	—	20,506,000 EUR	—	—	69,513,000 EUR	2,000 EUR	—	63,672,000 EUR	26,345,000 EUR	—	- EUR	—	—	149,492,000 EUR	—	149,531,000 EUR	—	39,000 EUR	139,223,000 EUR	—	18,444,000 EUR	—	—	—	8,136,000 EUR	- EUR	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	25,840,000 EUR	—	- EUR	—	—	25,840,000 EUR	296,000 EUR	—	26,136,000 EUR	- EUR	—	- EUR	—	—	21,998,000 EUR	—	21,998,000 EUR	—	- EUR	21,998,000 EUR	—	- EUR	—	—	—	- EUR	- EUR	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	181,000 EUR	—	2,650,000 EUR	—	2,469,000 EUR	2,650,000 EUR	—	- EUR	—	—	—	- EUR	- EUR	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	2,709,000 EUR	—	- EUR	—	—	2,709,000 EUR	- EUR	—	2,709,000 EUR	- EUR	—	- EUR	—	—	4,857,000 EUR	—	4,857,000 EUR	—	- EUR	4,857,000 EUR	—	- EUR	—	—	—	- EUR	- EUR	—	—	—	—	—	—	—	—