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Financial Instruments - Sensitivity Analysis of Market Risks (Details) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | U.S. dollars to Mexican pesos |  |  |
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 | (1,796) | (2,647) | (3,404)
Effect on equity from increase in exchange rate | 0 | 0 | 0
Effect on profit or loss from increase in exchange rate | 1,796 | 2,647 | 3,404
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 | (425) | (354) | (235)
Effect on equity from increase in exchange rate | 0 | 0 | 0
Effect on profit or loss from increase in exchange rate | 425 | 354 | 235
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 | (678) | (996) | (552)
Effect on equity from increase in exchange rate | 0 | 0 | 0
Effect on profit or loss from increase in exchange rate | 678 | 966 | 552
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | MXN/BRL |  |  |
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 |  | (18) | (123)
Effect on equity from increase in exchange rate |  | 0 | 0
Effect on profit or loss from increase in exchange rate |  | 18 | 123
FEMSA Entity Excluding Coca-Cola FEMSA | Currency swap contract | U.S. dollars to Euro |  |  |
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 | (742) |  |
Effect on equity from increase in exchange rate | 0 |  |
Effect on profit or loss from increase in exchange rate | 742 |  |
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 | (34) |  |
Effect on equity from increase in exchange rate | 0 |  |
Effect on profit or loss from increase in exchange rate | 34 |  |
FEMSA Entity Excluding Coca-Cola FEMSA | Net Cash In Foreign Currency | U.S. dollars to Euro |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | (14,617) | (1,779) | (4,931)
Effect on profit or loss from increase in exchange rate | 14,617 | 1,779 | 4,931
Coca-Cola FEMSA | Currency swap contract | U.S. dollars to Mexican pesos |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (1,314) | (1,220) | (1,645)
Effect on profit or loss from decrease in exchange rate | 0 | 0 | 0
Effect on equity from increase in exchange rate | 1,314 | 1,220 | 1,645
Effect on profit or loss from increase in exchange rate | 0 | 0 | 0
Coca-Cola FEMSA | Currency swap contract | U.S. dollars to Brazilian reais |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (1,683) | (2,893) | (2,300)
Effect on profit or loss from decrease in exchange rate | 0 | 0 | 0
Effect on equity from increase in exchange rate | 1,683 | 2,893 | 2,300
Effect on profit or loss from increase in exchange rate | 0 | 0 | 0
Coca-Cola FEMSA | Currency swap contract | U.S. dollars to Euro |  |  |
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 |  | (1,315) | (1,049)
Effect on equity from increase in exchange rate |  | 0 | 0
Effect on profit or loss from increase in exchange rate |  | 1,315 | 1,049
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 equity from increase in exchange rate |  | 0 |
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 | (1,797) | (2,282) | (3,200)
Effect on profit or loss from increase in exchange rate | 1,797 | 2,282 | 3,200
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 | (765) | (333) | (714)
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 | (2,812) | (4,520) | (39)
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward contract | U.S. dollars to Mexican pesos |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (9) | (6) | (4)
Effect on equity from increase in exchange rate | 9 | 6 | 4
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 | (78) |  |
Effect on equity from increase in exchange rate | 78 |  |
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 | 6 | (44) |
Effect on equity from increase in exchange rate | (6) | 44 |
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward contract | U.S. dollars to Brazilian reais |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate |  | (1) | (37)
Effect on equity from increase in exchange rate |  | 1 | 37
Currency risk | Coca-Cola FEMSA | Forward contract | U.S. dollars to Mexican pesos |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (465) | (512) | (298)
Effect on equity from increase in exchange rate | 465 | 512 | 298
Currency risk | Coca-Cola FEMSA | Forward contract | U.S. dollars to Brazilian reais |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (521) | (550) | (284)
Effect on equity from increase in exchange rate | 521 | 550 | 284
Currency risk | Coca-Cola FEMSA | Forward contract | URY/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (225) | (25) | (7)
Effect on equity from increase in exchange rate | 225 | 25 | 7
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 | (685) | (112) | (81)
Effect on equity from increase in exchange rate | 685 | 112 | 81
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 | (20) | (10) | (3)
Effect on equity from increase in exchange rate | 20 | 10 | 3
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 | (15) | (24) | (10)
Effect on equity from increase in exchange rate | $ 15 | $ 24 | $ 10

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