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Equity - Schedule of Common Stock (Detail) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Equity [Line Items] |  |  |
Number of shares | 561,000,000 | 561,000,000 | 561,000,000
Common stock value | $ 7,777,576 | $ 9,028,446 | $ 10,778,613
Series B common stock [Member] |  |  |
Disclosure Of Equity [Line Items] |  |  |
Number of shares | 476,850,000 | 476,850,000 | 476,850,000
Common stock value | $ 6,610,939 | $ 7,674,179 | $ 9,161,820
Series BB common stock [Member] |  |  |
Disclosure Of Equity [Line Items] |  |  |
Number of shares | 84,150,000 | 84,150,000 | 84,150,000
Common stock value | $ 1,166,637 | $ 1,354,267 | $ 1,616,793

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