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Earnings per Share - Summary of Calculation of Basic and Diluted Earnings Per Share Amounts (Detail) $ / shares in Units, shares in Millions, $ in Millions, $ in Millions | 6 Months Ended
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Jun. 30, 2019 MXN ($) $ / shares shares | Jun. 30, 2019 USD ($) shares | Jun. 30, 2018 MXN ($) $ / shares shares
Weighted average number of shares further adjusted to reflect dividend rights |  |  |  |  |  |
Net controlling interest income allocated from continuing operations | $ 8,639 | [1] | $ 450 | [1],[2] | $ 9,718 | [3],[4]
Net controlling interest income allocated from discontinued operations | $ |  |  |  |  | $ 132 | [3],[4]
Series B shares [member] |  |  |  |  |  |
Earnings per share [line items] |  |  |  |  |  |
Weighted average number of shares for basic earnings per share | shares | 9,244 |  | 9,244 |  | 9,244 |
Effect of dilution associated with non-vested shares for share based payment plans | shares | 2 |  | 2 |  | 3 |
Weighted average number of shares adjusted for the effect of dilution (Shares outstanding) | shares | 9,246 |  | 9,246 |  | 9,246 |
Dividend rights per series | 1.00% |  | 1.00% |  | 1.00% |
Weighted average number of shares further adjusted to reflect dividend rights |  |  |  |  |  |
Basic earnings per share from continuing operations | $ 0.43 |  |  |  | $ 0.48 |
Basic earnings per share from discontinued operations |  |  |  |  | 0.01 |
Diluted earnings per share from continuing operations | $ 0.43 |  |  |  | 0.48 |
Diluted earnings per share from discontinued operations |  |  |  |  | $ 0.01 |
Allocation of earnings, weighted | 46.11% |  | 46.11% |  | 46.11% |
Net controlling interest income allocated from continuing operations | $ | $ 3,984 |  |  |  |  |
Net controlling interest income allocated from discontinued operations | $ |  |  |  |  | $ 61 |
Series D shares [member] |  |  |  |  |  |
Earnings per share [line items] |  |  |  |  |  |
Weighted average number of shares for basic earnings per share | shares | 8,635 |  | 8,635 |  | 8,634 |
Effect of dilution associated with non-vested shares for share based payment plans | shares | 9 |  | 9 |  | 11 |
Weighted average number of shares adjusted for the effect of dilution (Shares outstanding) | shares | 8,645 |  | 8,645 |  | 8,645 |
Dividend rights per series | 1.25% |  | 1.25% |  | 1.25% |
Weighted average number of shares further adjusted to reflect dividend rights |  |  |  |  |  |
Basic earnings per share from continuing operations | $ 0.54 |  |  |  | $ 0.61 |
Basic earnings per share from discontinued operations |  |  |  |  | 0.01 |
Diluted earnings per share from continuing operations | $ 0.54 |  |  |  | 0.61 |
Diluted earnings per share from discontinued operations |  |  |  |  | $ 0.01 |
Allocation of earnings, weighted | 53.89% |  | 53.89% |  | 53.89% |
Net controlling interest income allocated from discontinued operations | $ |  |  |  |  | $ 71 |
[1] | The Company initially adopted IFRS 16 at January 1st, 2019 using the modified retrospectively effect method 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
[3] | Revised to reflect the discontinued Philippines operations of Coca-Cola FEMSA - See Note 4.2.1
[4] | The information herein was not restated with the adjustment, which was not material, to reflect the financial information of its subsidiary in Argentina that operates in a hyperinflationary economic environment.

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