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Earning Per Share - Summary of Earnings Per Share (Detail) - ARS ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings per share [abstract]
Net income	$ 12,340	$ (28,237)	$ 4,579
Average number of shares outstanding	392,625,259	391,497,615	392,101,191
Basic and diluted earnings per share	$ 31.43	$ (72.13)	$ 11.68

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- Definition

The amount of earnings per share when the basic and diluted measurements are equal. [Refer: Basic earnings (loss) per share; Diluted earnings (loss) per share]

+ References

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- Definition

The profit (loss) attributable to owners of the parent. [Refer: Profit (loss)]

+ References

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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