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Share-based payments - Vesting schedule of SARs (Details) - SARs - cash settled $ in Thousands	12 Months Ended
	Dec. 31, 2017 MXN ($) EquityInstruments	Dec. 31, 2016 MXN ($)	Dec. 31, 2015 MXN ($)
Share-based payments
Shares outstanding	5,358,053
Cash payment related to key employees related to SARs plan | $	$ 6,021	$ 31,261	$ 31,090
Vesting / Exercisable within one year
Share-based payments
Shares outstanding	2,766,811
Vesting / Exercisable within two years
Share-based payments
Shares outstanding	1,649,493
Vesting / Exercisable within three years
Share-based payments
Shares outstanding	941,749

X

- 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.

+ Details

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X

- Definition

The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard
-URIDate 2017-03-09

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X

- Definition

The amount of cash payment to key employees related to SARs plan.

+ References

No definition available.

+ Details

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