Share-based payments - Expense (benefit) recognized in retention plans (Details) - MXN ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based payments
Expense (benefit) arising from cash-settled share-based payments transactions		$ 40,724	$ (5,238)
Expense arising from cash-settled share-based payments transactions	$ 105,303
Expense arising from equity-settled share-based payments transactions	75,040	49,659	19,980
Total expense arising from share-based payments transactions	$ 180,343	$ 90,383
Total (benefit) arising from share-based payments transactions			$ 14,742

No definition available.

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- Definition

The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets.

+ References

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- Definition

The amount of benefit arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets]

+ References

No definition available.

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- Definition

The amount of benefit arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets.

+ References

No definition available.

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