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Income Taxes (Details) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes      
Income taxes, current $ 5,267,157 $ 6,448,961 $ 5,382,865
Income taxes, deferred (2,598,712) (2,058,457) (1,108,745)
Income tax provision $ 2,668,445 $ 4,390,504 $ 4,274,120
Current income tax of Mexican companies to the total current income taxes (as a percent) 95.00% 91.00% 93.00%
Corporate income tax rate (as a percent) 30.00% 30.00% 30.00%
Changes in tax rates or tax laws enacted or announced      
Income Taxes      
Corporate income tax rate (as a percent) 30.00%