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Mergers, Acquisitions and Disposals - Summary of Purchase Price to Fair Value of Net Assets Acquired and Reconciliation of Cash Flows (Detail) $ in Millions, $ in Millions | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 USD ($) | [2] | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($)
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Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total liabilities | $ (311,790) | [1] | $ (16,532) | $ (240,839) | $ (251,629)
Goodwill | 0 |  |  |  |
Other acquisitions [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total current assets | 4,085 |  |  |  |
Total non-current assets | 5,250 |  |  |  |
Total assets | 9,335 |  |  |  |
Total liabilities | 8,153 |  |  |  |
Net assets acquired | 1,182 |  |  |  |
Goodwill | 6,542 |  |  |  |
Non-controlling interest | (53) |  |  |  |
Total consideration transferred | 7,671 |  |  |  |
Amount to be paid | (147) |  |  |  |
Cash acquired | (389) |  |  |  |
Net cash paid | 7,135 |  |  |  |
Other acquisitions [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration transferred | $ 7,671 |  |  |  |
Cash acquired |  |  |  | (860) |
Other acquisitions [member] | Coca-Cola FEMSA [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total current assets |  |  |  | 1,864 |
Total non-current assets |  |  |  | 4,031 |
Total assets |  |  |  | 7,610 |
Total liabilities |  |  |  | (3,691) |
Net assets acquired |  |  |  | 3,649 |
Goodwill |  |  |  | 2,903 |
Total consideration transferred |  |  |  | 6,552 |
Cash acquired |  |  |  | (860) |
Net cash paid |  |  |  | 5,692 |
Other acquisitions [member] | Distribution rights [member] | Coca-Cola FEMSA [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Intangible assets recognised as of acquisition date |  |  |  | $ 1,715 |
[1] | The Company initially adopted IFRS 16 at January 1st, 2019 using the modified retrospectively approach under which the comparative information is not restated. – See Note 2.4.1
[2] | Convenience translation to U.S. dollars ($) – See Note 2.2.3

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