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Financial Instruments - Summary of Sensitivity Analysis of Interest Rate Risks (Detail) - Interest rate risk [member] - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in U.S.$ Rate | +100 bps | +100 bps | +100 bps
Effect on (Profit) or Loss | $ (134) | $ (251) | $ (211)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Change in foreign currancy rate, effect on profit (loss). + References No definition available. + Details
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- Definition Change in US dollar rate basis points description. + References No definition available. + Details
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- Details
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