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Financial Instruments - Sensitivity Analysis of Market Risks (Details) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | $ 0 | $ 0 | $ 0
Effect on profit or loss from decrease in exchange rate | (163) | (1,796) | (2,647)
Effect on equity from increase in exchange rate | 0 | 0 | 0
Effect on profit or loss from increase in exchange rate | 163 | 1,796 | 2,647
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | 0 | 0 |
Effect on profit or loss from decrease in exchange rate | (434) | (34) |
Effect on equity from increase in exchange rate | 0 | 0 |
Effect on profit or loss from increase in exchange rate | 434 | 34 |
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | COP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | 0 | 0 | 0
Effect on profit or loss from decrease in exchange rate | (16) | (425) | (354)
Effect on equity from increase in exchange rate | 0 | 0 | 0
Effect on profit or loss from increase in exchange rate | 16 | 425 | 354
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | CLP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | 0 | 0 | 0
Effect on profit or loss from decrease in exchange rate | (2,424) | (678) | (996)
Effect on equity from increase in exchange rate | 0 | 0 | 0
Effect on profit or loss from increase in exchange rate | 2,424 | 678 | 966
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | EUR/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | 0 |  |
Effect on profit or loss from decrease in exchange rate | (709) |  |
Effect on equity from increase in exchange rate | 0 |  |
Effect on profit or loss from increase in exchange rate | 709 |  |
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | USD/BRL |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate |  |  | 0
Effect on profit or loss from decrease in exchange rate |  |  | (18)
Effect on equity from increase in exchange rate |  |  | 0
Effect on profit or loss from increase in exchange rate |  |  | 18
FEMSA Entity Excluding Coca-Cola FEMSA | Net Cash In Foreign Currency | EUR/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | (14,855) | (14,617) | (1,779)
Effect on profit or loss from increase in exchange rate | 14,855 | 14,617 | 1,779
Coca-Cola FEMSA | Currency swap contract | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (1,863) | (1,314) | (1,220)
Effect on profit or loss from decrease in exchange rate | 0 | 0 | 0
Effect on equity from increase in exchange rate | 1,863 | 1,314 | 1,220
Effect on profit or loss from increase in exchange rate | 0 | 0 | 0
Coca-Cola FEMSA | Currency swap contract | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (2,187) | (1,683) | (2,893)
Effect on profit or loss from decrease in exchange rate | 0 | 0 | 0
Effect on equity from increase in exchange rate | 2,187 | 1,683 | 2,893
Effect on profit or loss from increase in exchange rate | 0 | 0 | 0
Coca-Cola FEMSA | Currency swap contract | EUR/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate |  | 0 | 0
Effect on profit or loss from decrease in exchange rate |  | (742) | (1,315)
Effect on equity from increase in exchange rate |  | 0 | 0
Effect on profit or loss from increase in exchange rate |  | 742 | 1,315
Coca-Cola FEMSA | Currency swap contract | EUR/MXN |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate |  |  | 0
Effect on profit or loss from decrease in exchange rate |  |  | (902)
Effect on profit or loss from increase in exchange rate |  |  | 902
Coca-Cola FEMSA | Net Cash In Foreign Currency | U.S. dollars |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | (1,397) | (1,797) | (2,282)
Effect on profit or loss from increase in exchange rate | 1,397 | 1,797 | 2,282
Commodity price risk | Coca-Cola FEMSA | Commodity price contracts | Sugar Price Contracts |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from change in commodity price | (1,578) | (765) | (333)
Commodity price risk | Coca-Cola FEMSA | Commodity price contracts | Aluminum price contracts |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from change in commodity price | (189) | (2,812) | (4,520)
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward contract | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (15) | (9) | (6)
Effect on equity from increase in exchange rate | 15 | 9 | 6
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward contract | MXN/EUR |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate |  |  | (1)
Effect on equity from increase in exchange rate |  |  | 1
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward contract | CHF/EUR |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (125) | (78) | (44)
Effect on equity from increase in exchange rate | 125 | 78 | 44
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward contract | EUR/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (7) | 6 |
Effect on equity from increase in exchange rate | 7 | (6) |
Currency risk | Coca-Cola FEMSA | Forward contract | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (183) | (465) | (512)
Effect on equity from increase in exchange rate | 183 | 465 | 512
Currency risk | Coca-Cola FEMSA | Forward contract | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (50) | (521) | (550)
Effect on equity from increase in exchange rate | 50 | 521 | 550
Currency risk | Coca-Cola FEMSA | Forward contract | COP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (34) | (225) | (112)
Effect on equity from increase in exchange rate | 34 | 225 | 112
Currency risk | Coca-Cola FEMSA | Forward contract | ARS/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (11) | (685) | (10)
Effect on equity from increase in exchange rate | 11 | 685 | 10
Currency risk | Coca-Cola FEMSA | Forward contract | UYU/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (13) | (20) | (25)
Effect on equity from increase in exchange rate | 13 | 20 | 25
Currency risk | Coca-Cola FEMSA | Forward contract | CRC/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (14) | (15) | (24)
Effect on equity from increase in exchange rate | 14 | 15 | 24
Currency risk | Coca-Cola FEMSA | Options To Purchase Foreign Currency | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity to purchase foreign currency | (136) | 0 | (4,520)
Currency risk | Coca-Cola FEMSA | Options To Purchase Foreign Currency | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity to purchase foreign currency | (119) | 0 | 0
Currency risk | Coca-Cola FEMSA | Options To Purchase Foreign Currency | COP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity to purchase foreign currency | $ (54) | $ 0 | $ 0

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