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Financial Instruments by Category - Summary of Company's Financial Assets Measured at Fair Value (Detail) - ARS ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items]
Financial Assets	$ 18,733	$ 31,987	$ 18,093
Investment in financial assets [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	10,941	12,936	15,285
Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	7,792	19,051	2,808
Public securities [member] | Investment in financial assets [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	10,941	12,936	15,232
Mutual funds [member] | Investment in financial assets [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets			53
Mutual funds [member] | Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	7,792	19,051	2,808
Level 1 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	18,733	31,987	18,093
Level 1 [member] | Investment in financial assets [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	10,941	12,936	15,285
Level 1 [member] | Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	7,792	19,051	2,808
Level 1 [member] | Public securities [member] | Investment in financial assets [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	10,941	12,936	15,232
Level 1 [member] | Mutual funds [member] | Investment in financial assets [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets			53
Level 1 [member] | Mutual funds [member] | Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	$ 7,792	$ 19,051	$ 2,808

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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.

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- Definition

The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 8
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_8_a&doctype=Standard
-URIDate 2018-03-16

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