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Share-based payments - Expense (benefit) recognized in retention plans (Details) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based payments      
Expense (benefit) arising from cash-settled share-based payments transactions   $ 105,303 $ 40,724
Expense arising from cash-settled share-based payments transactions $ (62,262)    
Expense arising from equity-settled share-based payments transactions 89,464 75,040 49,659
Total expense arising from share-based payments transactions $ 27,202 $ 180,343 $ 90,383