Statement Of Changes In Equity [Abstract]

alstria office REIT-AG - Filing #6744351

Concept	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 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
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	1.923.935 EUR	3,485 EUR	1.261.630 EUR	—	3.367.083 EUR	—	178,033 EUR	—	—	—	—	1.714.257 EUR	3,485 EUR	1.356.907 EUR	177,793 EUR	—	—	—	—	3.252.442 EUR	3,485 EUR	1.448.709 EUR	3.175.555 EUR	1.545.768 EUR	177,593 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	0 EUR	—	0 EUR	—	0 EUR	209,678 EUR	209,678 EUR	168,489 EUR	—	—	—	—	168,489 EUR	0 EUR	0 EUR	0 EUR	—	—	—	—	—	—
Other comprehensive income	—	—	—	0 EUR	—	0 EUR	—	0 EUR	0 EUR	0 EUR	0 EUR	—	—	—	—	0 EUR	0 EUR	0 EUR	0 EUR	—	—	—	—	—	—
Comprehensive income	—	—	—	0 EUR	—	0 EUR	—	0 EUR	209,678 EUR	209,678 EUR	168,489 EUR	—	—	—	—	168,489 EUR	0 EUR	0 EUR	0 EUR	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	—	0 EUR	—	0 EUR	—	94,230 EUR	94,230 EUR	0 EUR	94,125 EUR	—	—	—	—	0 EUR	94,125 EUR	0 EUR	0 EUR	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	—	—	0 EUR	—	240,000 EUR	—	240,000 EUR	480,000 EUR	0 EUR	400,000 EUR	—	—	—	—	0 EUR	200,000 EUR	0 EUR	200,000 EUR	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	0 EUR	—	0 EUR	—	3,210 EUR	3,210 EUR	0 EUR	2,123 EUR	—	—	—	—	0 EUR	2,123 EUR	0 EUR	0 EUR	—	—	—	—	—	—