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Financial Instruments - Summary of Sensitivity Analysis of Interest Rate Risks (Detail) - Interest Rate Risk - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in U.S.$ rate | 10000.00% | 10000.00% | 10000.00%
Effect on (profit) or loss | $ (102) | $ (44) | $ (134)

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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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