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Investments in Other Entities - Additional Information (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) | [1] | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($)
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Fair value loss on investment | $ (11) | $ (216) | [2] | $ (1,039) | $ 0
Percentage of equity interest |  |  |  | 0.00% |
Impairment of investments |  | 948 |  | $ 432 | 0
Investment in Associates and Joint Ventures [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Spin-off in other entities capitalized |  |  |  | (333) |
Compania Panamena de Bebidas, S.A.P.I. de C.V. [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Impairment of investments |  | 948 |  | 432 |
Joint ventures [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Equity earnings (loss) recognized |  | (215) |  | (270) | (175)
Promotora Industrial Azucarera, S.A. de C.V. ("PIASA") [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Capital contribution |  | 111 |  | 146 |
Industria Envasadora de Queretaro, S.A. de C.V. ("IEQSA") [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Dividend income |  |  |  | 8 |
Associates [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Equity earnings (loss) recognized |  | 84 |  | 44 | $ 235
Promotora Mexicana De Embotelladores SADeCV [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Dividend income |  | 1 |  |  |
Jugos del Valle, S.A.P.I. de C.V. [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Capital contribution |  | $ 204 |  | $ 73 |
[1] | Convenience translation to U.S. dollars ($) – See Note 2.2.3
[2] | The Company initially adopted IFRS 16 on January 1, 2019 using the modified retrospective approach under which the comparative information is not restated. – See Note 2.4.1

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