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Improvements to Concession Assets - Summary of the Net Amounts of Improvements to Concession Assets (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Service Concession Arrangements [Abstract]      
Improvements to concession assets $ 11,079,211 $ 11,281,378 $ 8,600,742
Construction in-progress 2,684,629 782,005 2,382,118
Total amounts $ 13,763,840 $ 12,063,383 $ 10,982,860