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Earnings per share - Narrative (Details) shares in Thousands | 12 Months Ended
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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

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- Definition Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount1 + References No definition available. + Details
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Namespace Prefix: | agro_
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Balance Type: | na
Period Type: | duration

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- Definition Number Of Categories Of Dilutive Potential Shares + References No definition available. + Details
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Namespace Prefix: | agro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | ifrs-full_EarningsPerShareAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration