Statement Of Financial Position [Abstract]

STRABAG SE - Filing #1128561

Concept	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31
Statement of financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	—	—	—	—	—	2.571.007 EUR	—	—	—	—	—	2.632.486 EUR	—	—	—	—	—	—	—	—	—	—	—
Goodwill	—	—	—	—	—	—	449,566 EUR	—	—	—	—	—	453,505 EUR	—	—	—	—	—	—	—	—	—	—	—
Investments accounted for using equity method	—	—	—	—	—	—	418,993 EUR	—	—	—	—	—	454,532 EUR	—	—	—	—	—	—	—	—	—	—	—
Investments in subsidiaries, joint ventures and associates reported in separate financial statements	—	—	—	—	—	—	187,638 EUR	—	—	—	—	—	175,062 EUR	—	—	—	—	—	—	—	—	—	—	—
Deferred tax assets	—	—	—	—	—	—	185,364 EUR	—	—	—	—	—	137,617 EUR	—	—	—	—	—	—	—	—	—	—	—
Cash and cash equivalents	—	—	—	—	—	—	2.856.954 EUR	—	—	—	—	—	2.460.814 EUR	—	—	—	—	—	—	—	—	—	—	—
Assets	—	—	—	—	—	—	12.134.441 EUR	—	—	—	—	—	12.250.811 EUR	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	—	—	—	—	110,000 EUR	—	—	—	—	—	110,000 EUR	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	—	—	—	—	—	—	22,074 EUR	—	—	—	—	—	33,695 EUR	—	—	—	—	—	—	—	—	—	—	—
Equity	1.824.618 EUR	22,074 EUR	74,647 EUR	4.086.146 EUR	110,000 EUR	89,209 EUR	4.108.220 EUR	2.315.384 EUR	3.822.204 EUR	33,695 EUR	47,505 EUR	2.315.384 EUR	3.855.899 EUR	1.531.174 EUR	86,849 EUR	110,000 EUR	55,418 EUR	33,088 EUR	3.620.685 EUR	2.315.384 EUR	3.653.773 EUR	76,076 EUR	110,000 EUR	1.326.795 EUR
Liabilities [abstract]
Deferred tax liabilities	—	—	—	—	—	—	61,291 EUR	—	—	—	—	—	48,696 EUR	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities	—	—	—	—	—	—	12.134.441 EUR	—	—	—	—	—	12.250.811 EUR	—	—	—	—	—	—	—	—	—	—	—