Statement Of Comprehensive Income [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 comprehensive income [abstract]
Profit (loss)	13,000 EUR	82,235,000 EUR	- EUR	- EUR	- EUR	82,248,000 EUR	82,248,000 EUR	- EUR	174,954,000 EUR	37,000 EUR	- EUR	174,991,000 EUR	- EUR	174,991,000 EUR
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	- EUR	12,735,000 EUR	- EUR	- EUR	- EUR	12,735,000 EUR	12,735,000 EUR	- EUR	35,768,000 EUR	- EUR	- EUR	35,768,000 EUR	- EUR	35,768,000 EUR
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	11,000 EUR	22,017,000 EUR	- EUR	- EUR	22,006,000 EUR	- EUR	22,006,000 EUR	18,444,000 EUR	18,442,000 EUR	2,000 EUR	- EUR	- EUR	- EUR	18,444,000 EUR
Cash flow hedges [abstract]
Other comprehensive income, net of tax, cash flow hedges	- EUR	- EUR	- EUR	- EUR	- EUR	- EUR	- EUR	- EUR	271,000 EUR	- EUR	271,000 EUR	- EUR	- EUR	271,000 EUR
Other comprehensive income	11,000 EUR	18,563,000 EUR	26,345,000 EUR	- EUR	20,506,000 EUR	12,735,000 EUR	18,574,000 EUR	18,444,000 EUR	25,462,000 EUR	2,000 EUR	8,136,000 EUR	35,768,000 EUR	- EUR	25,460,000 EUR
Comprehensive income	2,000 EUR	63,672,000 EUR	26,345,000 EUR	- EUR	20,506,000 EUR	69,513,000 EUR	63,674,000 EUR	18,444,000 EUR	149,492,000 EUR	39,000 EUR	8,136,000 EUR	139,223,000 EUR	- EUR	149,531,000 EUR
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	63,674,000 EUR	—	—	—	—	—	—	149,531,000 EUR	—	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	2,000 EUR	—	—	—	—	—	—	39,000 EUR	—	—	—	—	—