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Equity - Summary of Capital Stock (Details) - MXN ($) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |
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Jan. 26, 2025 | Oct. 17, 2024 | Oct. 15, 2024 | Jul. 18, 2024 | Jul. 16, 2024 | Apr. 18, 2024 | Apr. 16, 2024 | Dec. 09, 2023 | Nov. 07, 2023 | Nov. 03, 2023 | May 08, 2023 | May 03, 2023 | Nov. 05, 2021 | May 06, 2021 | May 04, 2021 | Nov. 03, 2020 | Dec. 31, 2023 | Dec. 31, 2024 | Mar. 22, 2024 | Mar. 19, 2024 | Mar. 31, 2023 | Mar. 27, 2023 | Dec. 31, 2022 | 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 596,000,000 | $ 596,000,000 |  |  |  |  |  |  |
Total CUFIN balance amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 383,998,000,000 |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,404,000,000 |  |  |  |  |  |  |
Shares reacquired (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,128,863 |  |  |  |  |  |  |  |
“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 |  |  |  |  |  |  |
Series "D" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Series "D-B" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Series "D-L" (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
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 |  |  |  |  |  | $ 10,294,000,000 |  |  |  |  |  |  |  |  |  |  | $ 12,247,000,000 | $ 14,697,000,000 | $ 14,697,000,000 |  | $ 12,247,000,000 |  | $ 11,358,000,000 | $ 11,358,000,000 |
Percentage of dividend paid |  | 25.00% |  | 25.00% |  | 25.00% |  |  | 50.00% |  | 50.00% |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |
Maximum reserve for share purchase |  |  |  |  |  |  |  |  | $ 17,000,000,000 |  |  |  | $ 17,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares | Dividend Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of dividend paid | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum reserve for share purchase | $ 34,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares | “BD” Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 102,201,323 |  |  |  |  |  |  |
Total shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 511,000,000 |  |  |  |  |  |  |
Ordinary shares | Non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  | $ 6,741,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coca-Cola FEMSA | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend approved to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,185,000,000 | $ 12,773,000,000 |  | $ 12,773,000,000 |  | $ 12,185,000,000 | $ 11,407,000,000 |  | $ 11,407,000,000
Percentage of dividend paid |  |  | 25.00% |  | 25.00% |  | 25.00% | 25.00% |  | 50.00% |  | 50.00% | 50.00% |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |

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