Statement Of Changes In Equity [Abstract]

Altarea - Filing #2816703

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through change in equity of subsidiaries, equity	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR	– EUR
Increase (decrease) through transactions with owners, equity	413,000,000 EUR	98,000,000 EUR	461,000,000 EUR	2,585,000,000 EUR	2,801,000,000 EUR	579,000,000 EUR	2,998,000,000 EUR	88,000,000 EUR	946,000,000 EUR	195,000,000 EUR	751,000,000 EUR	780,000,000 EUR	92,000,000 EUR	151,000,000 EUR
Cancellation of treasury shares	– EUR	98,000,000 EUR	– EUR	257,000,000 EUR	– EUR	159,000,000 EUR	257,000,000 EUR	– EUR	18,000,000 EUR	– EUR	18,000,000 EUR	– EUR	92,000,000 EUR	109,000,000 EUR