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Equity - Summary of Capital Stock (Details) - MXN ($) $ in Millions |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |
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Nov. 07, 2023 | Nov. 03, 2023 | May 05, 2023 | May 03, 2023 | Nov. 07, 2022 | Nov. 03, 2022 | May 05, 2022 | May 03, 2022 | Nov. 05, 2021 | May 06, 2021 | May 04, 2021 | Nov. 03, 2020 | Dec. 31, 2023 | Apr. 08, 2023 | Mar. 28, 2023 | Dec. 31, 2022 | Apr. 08, 2022 | Mar. 28, 2022 | Dec. 31, 2021 | Nov. 03, 2021 | Mar. 24, 2021 | Mar. 19, 2021
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 3,578,226,270 |  |  | 3,578,226,270 |  |  |  |  |  |
Series "B" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 9,246,420,270 |  |  | 9,246,420,270 |  |  |  |  |  |
Series "D" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 8,644,711,080 |  |  | 8,644,711,080 |  |  |  |  |  |
Series "D-B" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  | 4,322,355,540 |  |  |  |  |  |
Series "D-L" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  | 4,322,355,540 |  |  |  |  |  |
Total shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 17,891,131,350 |  |  | 17,891,131,350 |  |  |  |  |  |
Statutory reserve |  |  |  |  |  |  |  |  |  |  |  |  | $ 596 |  |  | $ 596 |  |  |  |  |  |
Total CUFIN balance amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 351,271 |  |  |  |  |  |  |  |  |
Shares reacquired (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 381,300 |  |  |  |  |  |  |  |  |
“B” Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 1,417,048,500 |  |  | 1,417,048,500 |  |  |  |  |  |
Series "B" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 7,085,242,500 |  |  | 7,085,242,500 |  |  |  |  |  |
Total shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 7,085,242,500 |  |  | 7,085,242,500 |  |  |  |  |  |
“BD” Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 2,161,177,770 |  |  | 2,161,177,770 |  |  |  |  |  |
Series "B" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 2,161,177,770 |  |  | 2,161,177,770 |  |  |  |  |  |
Series "D" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 8,644,711,080 |  |  | 8,644,711,080 |  |  |  |  |  |
Series "D-B" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  | 4,322,355,540 |  |  |  |  |  |
Series "D-L" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 4,322,355,540 |  |  | 4,322,355,540 |  |  |  |  |  |
Total shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 10,805,888,850 |  |  | 10,805,888,850 |  |  |  |  |  |
Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,247 | $ 12,247 |  | $ 11,358 | $ 11,358 |  | $ 7,687 |  | $ 7,687 |
Percentage of dividend paid | 50.00% |  | 50.00% |  | 50.00% |  | 50.00% |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |
Maximum reserve for share purchase | $ 17,000 |  |  |  | $ 17,000 |  |  |  | $ 17,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares | Non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  | $ 6,431 |  |  |  | $ 6,021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coca-Cola FEMSA | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,185 |  | $ 12,185 | $ 11,407 |  | $ 11,407 | $ 10,588 |  |  | $ 10,588
Percentage of dividend paid |  | 50.00% |  | 50.00% |  | 50.00% |  | 50.00% | 50.00% |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |
Coca-Cola FEMSA | Ordinary shares | Non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,588 |  |

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