Statement Of Changes In Equity [Abstract]

STRABAG SE - Filing #998558

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	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	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 disposal of subsidiary, equity	– EUR	3,244,000 EUR	– EUR	– EUR	3,244,000 EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	0 EUR	151,000 EUR	– EUR	151,000 EUR	– EUR	– EUR
Purchase of treasury shares	—	—	—	—	—	—	—	—	—	– EUR	– EUR	– EUR	399,524,000 EUR	399,524,000 EUR	399,524,000 EUR	– EUR	– EUR	– EUR
Sale or issue of treasury shares	– EUR	565,515,000 EUR	– EUR	565,515,000 EUR	– EUR	– EUR	– EUR	565,515,000 EUR	– EUR	—	—	—	—	—	—	—	—	—
Reduction of issued capital	1,900,000,000 EUR	903,380,000 EUR	– EUR	996,620,000 EUR	– EUR	– EUR	– EUR	903,380,000 EUR	– EUR	—	—	—	—	—	—	—	—	—