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Improvements to Concession Assets - Summary of the Net Amounts of Improvements to Concession Assets (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure Of Service Concession Arrangements [Abstract]      
Improvements to concession assets $ 7,567,539 $ 7,204,802 $ 6,848,394
Construction in-progress 2,376,483 1,707,742 445,924
Total amounts $ 9,944,022 $ 8,912,544 $ 7,294,318