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Investments in Associates and Joint Ventures - Summary of Movements Which Affected the Value of Investments in associates and joint ventures (Detail) - ARS ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investments In Associates And Joint Ventures [Abstract]
Amount at the beginning of year	$ 5,488	$ 4,371	$ 3,175
Acquisitions and contributions	910	448	163
Income on investments in associates and joint ventures	1,428	588	318
Conversion differences	662	601	999
Distributed dividends	(328)	(520)	(280)
Other movements	2	0	(4)
Reclassification of assets held for disposal	(2,117)	0	0
Amount at the end of year	$ 6,045	$ 5,488	$ 4,371

X

- Definition

The amount of dividends received.

+ References

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- Definition

The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2017-01-01
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- Definition

The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2017-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective on first application of IFRS 9
-Name IFRS
-Number 4
-IssueDate 2017-01-01
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Acquisitions and contributions.

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Conversion differences on investments.

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Investments In Associates And Joint Ventures [Abstract]

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Other movements.

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Reclassification of subsidiary assets held for disposal.

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