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Biological assets - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about biological assets [line items] |  |
Percentage of reasonably possible increase in estimated costs | 10.00% | 10.00%
Percentage of reasonably possible decrease in estimated costs | (10.00%) | (10.00%)
Biological assets | $ 113,184 | $ 141,645
Sown land – sugarcane |  |
Disclosure of detailed information about biological assets [line items] |  |
Increase in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets | 10,800,000 | 9,100,000
Decrease in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets | 8,600,000 | 10,800,000
Sown land – crops |  |
Disclosure of detailed information about biological assets [line items] |  |
Increase in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets | 1,000,000 | 1,100,000
Decrease in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets | 1,500,000 | 1,000,000
Sown land – rice |  |
Disclosure of detailed information about biological assets [line items] |  |
Increase in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets | 2,700,000 | 2,800,000
Decrease in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets | $ 3,400,000 | $ 2,700,000

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- Definition Fair Value Of Biological Assets, Net Of Cost Of Agricultural Produce At Harvest + References No definition available. + Details
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Namespace Prefix: | agro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Percentage Of Reasonably Possible Decrease In One Or More Unobservable Inputs + References No definition available. + Details
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Namespace Prefix: | agro_
Data Type: | num:percentItemType
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- Definition Percentage Of Reasonably Possible Increase In One Or More Unobservable Inputs + References No definition available. + Details
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Namespace Prefix: | agro_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The amount of decrease in the fair value measurement of assets due to a change in one or more unobservable inputs to reflect reasonably possible alternative assumptions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph h -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_h_ii&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of increase in the fair value measurement of assets due to a change in one or more unobservable inputs to reflect reasonably possible alternative assumptions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph h -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_h_ii&doctype=Standard -URIDate 2017-03-09 + Details
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Balance Type: | debit
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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |