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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 29, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash And Cash Equivalents [Abstract]          
Cash $ 1,912,047 $ 1,616,408   $ 1,560,536  
Investments of cash surpluses 3,894,166 5,855,824   3,326,662  
Cash equivalents designated for expenditure, held in trust 345,244 257,911   300,940  
Cash and cash equivalents $ 6,151,457 $ 7,730,143 $ 230,244 $ 5,188,138 $ 2,996,499