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Critical accounting estimates and judgments (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Changes In Accounting Policies, Accounting Estimates And Errors [Abstract] |
Summary of goodwill allocated | The following table shows only the 3 CGUs where goodwill was allocated at each period end and the corresponding amount of goodwill allocated to each one:
CGU/ Operating segment |  | September 30, 2017 |  | September 30, 2016
AVI / Sugar, Ethanol and Energy |  | 5,012 |  |  | 4,892 |
UMA / Sugar, Ethanol and Energy |  | 2,622 |  |  | 2,564 |
Closing net book value of goodwill allocated to CGUs tested (Note 14) |  | 7,634 |  |  | 7,456 |
Closing net book value of PPE items and other assets allocated to CGUs tested |  | 719,558 |  |  | 689,857 |
Total assets allocated to 3 CGUs tested |  | 727,192 |  |  | 697,313 |
The following table shows only the 11 CGUs (2016: 11 CGUs) where goodwill was allocated at each period end and the corresponding amount of goodwill allocated to each one:
CGU / Operating segment / Country |  | September 30, 2017 |  | September 30, 2016
La Carolina / Crops / Argentina |  | 35 |  |  | 40 |
La Carolina / Cattle / Argentina |  | 12 |  |  | 13 |
El Orden/ Crops / Argentina |  | 53 |  |  | 60 |
El Orden/ Cattle / Argentina |  | 4 |  |  | 5 |
La Guarida / Crops / Argentina |  | 358 |  |  | 405 |
La Guarida / Cattle / Argentina |  | 292 |  |  | 330 |
Los Guayacanes / Crops / Argentina |  | 452 |  |  | 511 |
Doña Marina / Rice / Argentina |  | 1,595 |  |  | 1,803 |
Huelen / Crops / Argentina |  | 1,787 |  |  | 2,020 |
El Colorado / Crops / Argentina |  | 787 |  |  | 890 |
El Colorado / Cattle / Argentina |  | 115 |  |  | 130 |
Closing net book value of goodwill allocated to CGUs tested (Note 14) |  | 5,490 |  |  | 6,207 |
Closing net book value of PPE items and other assets allocated to CGUs tested |  | 34,668 |  |  | 36,901 |
Total assets allocated to CGUs tested |  | 40,158 |  |  | 43,108 |
Disclosure of key assumptions in valuation calculations | The key assumptions used by management in the value-in-use calculations which are considered to be most sensitive to the calculation are:
Key Assumptions |  | September 30, 2017 |  | September 30, 2016
Financial projections |  | Covers 4 years for UMA |  | Covers 4 years for UMA
|  | Cover 7 years for AVI |  | Cover 7 years for AVI
Yield average growth rates |  | 0-1% |  | 0-1%
Future pricing increases |  | 3% per annum |  | 3% per annum
Future cost increases |  | 1% per annum |  | 3% per annum
Discount rates |  | 7.6% |  | 6.2%
Perpetuity growth rate |  | 2.0% |  | 2.0%

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- Definition Disclosure of changes in accounting policies, accounting estimates and errors [Abstract] + References No definition available. + Details
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- Definition Disclosure of Goodwill Allocated to Cash-Generating Units [Table Text Block] + References No definition available. + Details
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- Definition The disclosure of significant inputs for which market data are not available and that are developed using the best information available about the assumptions that market participants would use when measuring the fair value of assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_d&doctype=Standard -URIDate 2017-03-09 + Details
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