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Finance Expense, Net (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
MXN ($)
$ / $
Dec. 31, 2018
MXN ($)
$ / $
Dec. 31, 2017
MXN ($)
$ / $
Finance Expense, Net      
Interest expense $ (10,402,021) $ (9,707,324) $ (9,245,671)
Other finance expense, net (873,177) (859,642)  
Finance expense (11,275,198) (10,566,966) (9,245,671)
Interest income 1,529,112 1,567,100 2,268,711
Foreign exchange gain, net 935,291 220,149 768,923
Other finance income, net     903,204
Finance income 2,464,403 1,787,249 3,940,838
Finance expense, net (8,810,795) $ (8,779,717) (5,304,833)
Fees for the prepayment of Senior Notes due 2018     $ 158,496
Additional lease liabilities $ 426,541    
Foreign exchange rate | $ / $ 18.8838 19.6730 19.7051
Interest income from temporary investments     $ 787,298