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Foreign Currency Transactions - Summary of Transactions Denominated in Foreign Currency (Parenthetical) (Detail) $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2020 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($)
Foreign Currency Transactions [Abstract] |  |  |  |  |  |
Interest expense | $ 1,514,250 | $ 7.7 | $ 1,425,746 | $ 6.4 | $ 1,012,411 | $ 6.5

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- Definition Foreign currency transactions. + References No definition available. + Details
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