Financial risk management - Summary of Derivative Contracts (Details) ton in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($) ton	Dec. 31, 2017 USD ($) ton
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	216,195	347,451
Notional amount	$ 55,828	$ 130,069
Fair Value Asset/ (Liability)	6,032	3,965
Loss/(Gain)	$ 12,885	$ 3,336
Corn \| Futures
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	(97)	(33)
Notional amount	$ (14,791)	$ (3,198)
Fair Value Asset/ (Liability)	(209)	48
Loss/(Gain)	$ (209)	$ 361
Soybean \| Futures
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	25	83
Notional amount	$ 8,089	$ 19,195
Fair Value Asset/ (Liability)	527	670
Loss/(Gain)	$ 177	$ (765)
Wheat \| Futures
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	(14)	(45)
Notional amount	$ (2,483)	$ (7,083)
Fair Value Asset/ (Liability)	(11)	(38)
Loss/(Gain)	$ (85)	$ (38)
Sugar \| Futures
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	208,837	343,874
Notional amount	$ 64,753	$ 121,072
Fair Value Asset/ (Liability)	5,483	3,231
Loss/(Gain)	$ 12,765	$ 3,808
Sugar \| Buy put
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	6,326
Notional amount	$ 128
Fair Value Asset/ (Liability)	267
Loss/(Gain)	$ 393
Sugar \| Sell call
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton	1,118
Notional amount	$ 132
Fair Value Asset/ (Liability)	(25)
Loss/(Gain)	$ (156)
Sugar \| Sell put
Disclosure of detailed information about financial instruments [line items]
Tons of biological asset \| ton		3,572
Notional amount		$ 83
Fair Value Asset/ (Liability)		54
Loss/(Gain)		$ (30)

Derivative Financial Assets (Liabilities), Excluding Foreign Currency

No definition available.

Name:	agro_DerivativeFinancialAssetsLiabilitiesExcludingForeignCurrency
Namespace Prefix:	agro_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Tons of Biological Asset

+ References

No definition available.

+ Details

Name:	agro_TonsofBiologicalAsset
Namespace Prefix:	agro_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_85&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_ProductsAndServicesAxis=agro_CornMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=ifrs-full_FuturesContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ProductsAndServicesAxis=agro_SoybeanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ProductsAndServicesAxis=agro_WheatMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ProductsAndServicesAxis=agro_SugarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=agro_BuyPutOptionContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=agro_SellCallOptionContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=agro_SellPutOptionContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: