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Equity - Summary of Capital Stock (Details) - MXN ($) $ in Millions | Nov. 05, 2021 | Nov. 03, 2021 | May 06, 2021 | May 04, 2021 | Nov. 05, 2020 | Nov. 03, 2020 | Aug. 20, 2020 | May 05, 2020 | Nov. 05, 2019 | Nov. 01, 2019 | May 07, 2019 | May 03, 2019 | Dec. 31, 2021 | Mar. 24, 2021 | Mar. 19, 2021 | Dec. 31, 2020 | Mar. 20, 2020 | Mar. 17, 2020 | Mar. 22, 2019 | Mar. 14, 2019
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Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units |  |  |  |  |  |  |  |  |  |  |  |  | 3,578,226,270 |  |  |  |  |  |  |
Series "B" |  |  |  |  |  |  |  |  |  |  |  |  | 9,246,420,270 |  |  |  |  |  |  |
Series "D" |  |  |  |  |  |  |  |  |  |  |  |  | 8,644,711,080 |  |  |  |  |  |  |
Subseries "D-B" |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  |  |  |  |  |
Subseries "D-L" |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  |  |  |  |  |
Total shares |  |  |  |  |  |  |  |  |  |  |  |  | 17,891,131,350 |  |  | 17,891,131,350 |  |  |  |
Total CUFIN balance amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 262,843 |  |  |  |  |  |  |
Statutory reserve |  |  |  |  |  |  |  |  |  |  |  |  | $ 596 |  |  | $ 596 |  |  |  |
B units. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units |  |  |  |  |  |  |  |  |  |  |  |  | 1,417,048,500 |  |  |  |  |  |  |
Series "B" |  |  |  |  |  |  |  |  |  |  |  |  | 7,085,242,500 |  |  |  |  |  |  |
Total shares |  |  |  |  |  |  |  |  |  |  |  |  | 7,085,242,500 |  |  |  |  |  |  |
BD units. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units |  |  |  |  |  |  |  |  |  |  |  |  | 2,161,177,770 |  |  |  |  |  |  |
Series "B" |  |  |  |  |  |  |  |  |  |  |  |  | 2,161,177,770 |  |  |  |  |  |  |
Series "D" |  |  |  |  |  |  |  |  |  |  |  |  | 8,644,711,080 |  |  |  |  |  |  |
Subseries "D-B" |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  |  |  |  |  |
Subseries "D-L" |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  |  |  |  |  |
Total shares |  |  |  |  |  |  |  |  |  |  |  |  | 10,805,888,850 |  |  |  |  |  |  |
Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,687 |  |  | $ 10,360 |  | $ 9,692 |
Percentage of dividend paid | 50.00% |  | 50.00% |  | 50.00% |  | 50.00% |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Maximum reserve for share purchase | $ 17,000 |  |  |  | $ 17,000 |  |  |  | $ 7,000 |  |  |  |  |  |  |  |  |  |  |
Ordinary shares | Non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  | $ 5,588 |  |  |  | $ 5,389 |  |  |  | $ 3,925 |  |  |  |  |  |  |  |  |  |
Coca-Cola FEMSA | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,588 |  |  | $ 10,210 |  | $ 7,437
Percentage of dividend paid |  | 50.00% |  | 50.00% |  | 50.00% |  | 50.00% | 50.00% | 50.00% |  | 50.00% |  |  |  |  |  |  |  |

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