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Property, plant and equipment - Movements in impairment of PP&E (Details) - ARS ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movements in impairment of PP&E
Property, plant and equipment at beginning of period	$ 23,165	$ 17,963
Additions	(316)	(383)	$ (199)
Property, plant and equipment at end of period	28,538	23,165	17,963
PP&E without materials | Accumulated impairment
Movements in impairment of PP&E
Property, plant and equipment at beginning of period	(282)	(203)
Additions	(234)	(367)
Uses	211	288
Property, plant and equipment at end of period	$ (305)	$ (282)	$ (203)

X

- Definition

The decrease in property, plant and equipment resulting from disposals and retirements. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 16
-IssueDate 2017-01-01
-Paragraph 73
-Subparagraph e
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-URIDate 2017-03-09

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X

- Definition

The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2017-01-01
-Paragraph 73
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 54
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_a&doctype=Standard
-URIDate 2017-03-09

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X

- Definition

The amount of gain on disposal, impairment and disposal of property, plant and equipment.

+ References

No definition available.

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- References

No definition available.

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