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Accounting Policies - Share-based Payment Agreements (Details) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Payment Agreements      
Share-based compensation expense $ 1,129,644 $ 1,327,549 $ 1,489,884
Share-based compensation credited in consolidated stockholder's equity $ 1,108,094 $ 1,305,999 $ 1,468,337