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Equity - Summary of Capital Stock Prior To and Immediately After Stock Split (Detail) - shares | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of Capital Stock [line items] |  |  |  |  |
Outstanding shares | [1] | 16,806,658,000 | 16,806,658,000 | 16,806,658,000 | 16,659,232,000
Fomento Economico Mexicano S.A.B. de C.V. [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Percentage of the capital stock |  | 47.20% |  |  |
Percentage of ordinary shares with full voting rights |  | 56.00% |  |  |
The Coca-Cola Company [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Percentage of the capital stock |  | 27.80% |  |  |
Percentage of ordinary shares with full voting rights |  | 32.90% |  |  |
Major ordinary share transactions prior to stock split [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Outstanding shares |  | 2,100,832,262 |  |  |
Percentage of the capital stock |  | 100.00% |  |  |
Percentage of ordinary shares with full voting rights |  | 100.00% |  |  |
Major ordinary share transactions prior to stock split [member] | Series L share [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Public float |  |  |
Outstanding shares |  | 525,208,065 |  |  |
Percentage of the ownership |  | 25.01% |  |  |
Percentage of voting equity interest acquired |  | 0.00% |  |  |
Major ordinary share transactions prior to stock split [member] | Fomento Economico Mexicano S.A.B. de C.V. [member] | Series A shares [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Wholly-owned subsidiary of Fomento Económico Mexicano, S.A.B. de C.V. |  |  |
Outstanding shares |  | 992,078,519 |  |  |
Percentage of the capital stock |  | 47.22% |  |  |
Percentage of ordinary shares with full voting rights |  | 62.96% |  |  |
Major ordinary share transactions prior to stock split [member] | The Coca-Cola Company [member] | Series D share [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Wholly-owned subsidiaries of The Coca-Cola Company |  |  |
Outstanding shares |  | 583,545,678 |  |  |
Percentage of the capital stock |  | 27.78% |  |  |
Percentage of ordinary shares with full voting rights |  | 37.04% |  |  |
Major ordinary share transactions after stock split [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Outstanding shares |  | 16,806,658,096 |  |  |
Percentage of the capital stock |  | 100.00% |  |  |
Percentage of ordinary shares with full voting rights |  | 100.00% |  |  |
Major ordinary share transactions after stock split [member] | Series L share [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Public float |  |  |
Outstanding shares |  | 2,626,040,325 |  |  |
Percentage of the ownership |  | 15.63% |  |  |
Percentage of voting equity interest acquired |  | 0.00% |  |  |
Major ordinary share transactions after stock split [member] | Series B Shares [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Public float |  |  |
Outstanding shares |  | 1,575,624,195 |  |  |
Percentage of the ownership |  | 9.38% |  |  |
Percentage of voting equity interest acquired |  | 11.11% |  |  |
Major ordinary share transactions after stock split [member] | Fomento Economico Mexicano S.A.B. de C.V. [member] | Series A shares [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Wholly-owned subsidiary of Fomento Económico Mexicano, S.A.B. de C.V. |  |  |
Outstanding shares |  | 7,936,628,152 |  |  |
Percentage of the capital stock |  | 47.22% |  |  |
Percentage of ordinary shares with full voting rights |  | 55.97% |  |  |
Major ordinary share transactions after stock split [member] | The Coca-Cola Company [member] | Series D share [member] |  |  |  |  |
Disclosure of Capital Stock [line items] |  |  |  |  |
Shareholders |  | Wholly-owned subsidiaries of The Coca-Cola Company |  |  |
Outstanding shares |  | 4,668,365,424 |  |  |
Percentage of the capital stock |  | 27.78% |  |  |
Percentage of ordinary shares with full voting rights |  | 32.92% |  |  |
[1] | The information for the years ended December 31, 2018 have been adjusted retrospectively for comparative purposes based on the number of shares resulting from the stock split occurred in March 2019.

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