Earnings per share - Narrative (Details) shares in Thousands	12 Months Ended
Dec. 31, 2019 category shares	Dec. 31, 2018 shares	Dec. 31, 2017 shares
Earnings per share [abstract]
Number of categories of dilutive potential shares \| category	2
Antidilutive securities (shares) \| shares	737	851	1,658

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount1

No definition available.

Name:	agro_AntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareAmount1
Namespace Prefix:	agro_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration