Statement Of Changes In Equity [Abstract]

Avantium N.V. - Filing #1859533

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	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 transfer between revaluation surplus and retained earnings, equity	— EUR	183,000 EUR	— EUR	— EUR	183,000 EUR	300,000 EUR	— EUR	— EUR	— EUR	300,000 EUR
Increase (decrease) through transactions with owners, equity	25,956,000 EUR	1,528,000 EUR	537,000 EUR	28,205,000 EUR	183,000 EUR	300,000 EUR	8,000 EUR	852,000 EUR	— EUR	545,000 EUR
Sale or issue of treasury shares	—	—	—	—	—	— EUR	— EUR	5,000 EUR	— EUR	5,000 EUR