Statement Of Changes In Equity [Abstract]

STRABAG SE - Filing #1078023

Concept	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 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
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	2.085.806 EUR	1.964.359 EUR	—	—	4.071.822 EUR	47,209 EUR	—	—	4.047.506 EUR	24,316 EUR	58,050 EUR	102,600 EUR	—	—	—	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
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	10,697 EUR	—	—	—	585,706 EUR	—	—	—	—	—	—	—	—	596,403 EUR	585,706 EUR	399,064 EUR	—	—	—	—	—	395,217 EUR	—	—	—	—	3,847 EUR	—	395,217 EUR	—	—	—	—	—	—	—	—
Other comprehensive income	398,000 EUR	—	—	27,438 EUR	84,408 EUR	—	—	31,159 EUR	—	—	—	—	—	84,010 EUR	25,811 EUR	41,410 EUR	—	—	—	—	—	12,023 EUR	12,202 EUR	—	—	41,705 EUR	116,000 EUR	—	41,526 EUR	—	—	—	—	—	—	—	—
Comprehensive income	10,299 EUR	—	—	27,438 EUR	670,114 EUR	—	—	31,159 EUR	—	—	—	—	—	680,413 EUR	611,517 EUR	357,654 EUR	—	—	—	—	—	383,194 EUR	12,202 EUR	—	—	41,705 EUR	3,963 EUR	—	353,691 EUR	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	6,121 EUR	—	—	—	707,940 EUR	—	—	—	—	—	—	—	—	714,061 EUR	707,940 EUR	105,813 EUR	—	—	—	—	—	92,340 EUR	—	—	—	—	13,473 EUR	—	92,340 EUR	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	—	—	—	—	236,978 EUR	—	—	—	—	—	236,978 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	1,936 EUR	—	—	0 EUR	814,000 EUR	—	—	0 EUR	—	—	—	—	—	2,750 EUR	814,000 EUR	480,000 EUR	—	—	—	—	—	2,590 EUR	0 EUR	—	—	1,000 EUR	2,111 EUR	—	2,591 EUR	—	—	—	—	—	—	—	—