Statement Of Changes In Equity [Abstract]

Altarea - Filing #909108

Concept	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	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31
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	0 EUR	0 EUR	- EUR
Increase (decrease) through transactions with owners, equity	88,000,000 EUR	946,000,000 EUR	195,000,000 EUR	751,000,000 EUR	92,000,000 EUR	780,000,000 EUR	151,000,000 EUR	98,000,000 EUR	891,000,000 EUR	961,000,000 EUR	243,000,000 EUR	1,291,000,000 EUR	400,000,000 EUR	215,000,000 EUR
Cancellation of treasury shares	- EUR	18,000,000 EUR	- EUR	18,000,000 EUR	92,000,000 EUR	- EUR	109,000,000 EUR	- EUR	65,000,000 EUR	- EUR	149,000,000 EUR	65,000,000 EUR	- EUR	215,000,000 EUR