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Information by Segment - Summary of Segment Disclosure for Company's Consolidated Operations (Parenthetical) (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($) | Dec. 31, 2018 USD ($)
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | $ 182,342 | $ 9,286 | $ 183,256 | $ 177,718 |
Total assets | 263,787 |  | 285,677 | 279,256 | $ 13,436
Total liabilities | 132,037 |  | 144,967 | 150,023 | $ 6,726
Mexico and central America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total assets | 147,748 |  | 163,635 | 136,252 |
Total liabilities | 96,525 |  | 101,330 | 95,342 |
South America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total assets | 116,039 |  | 122,042 | 130,019 |
Total liabilities | 35,512 |  | 43,637 | 48,391 |
Mexico [member] | Mexico and central America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | 84,352 |  | 79,836 | 74,413 |
Total assets | 130,865 |  | 133,315 | 122,552 |
Total liabilities | 92,340 |  | 88,283 | 92,303 |
Brazil [member] | South America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | 56,523 |  | 58,518 | 43,900 |
Total assets | 86,007 |  | 95,713 | 104,092 |
Total liabilities | 26,851 |  | 31,580 | 39,600 |
Colombia [member] | South America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | 14,580 |  | 14,222 | 15,120 |
Total assets | 17,626 |  | 14,180 | 20,581 |
Total liabilities | 4,061 |  | 7,993 | 5,547 |
Argentina [member] | South America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | 9,152 |  | 13,869 | 12,273 |
Total assets | 6,021 |  | 5,301 | 5,346 |
Total liabilities | 2,059 |  | 3,660 | $ 3,244 |
URUGUAY | South America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | 1,925 |  |  |  |
Total assets | 6,385 |  |  |  |
Total liabilities | 2,541 |  |  |  |
Discontinued operations [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenue | 24,167 |  | $ 20,524 |  |
Discontinued operations [member] | Asia [member] | Mexico and central America segment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total assets | 28,272 |  |  |  |
Total liabilities | $ 9,945 |  |  |  |

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