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Financial Instruments - Sensitivity Analysis of Market Risks (Details) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | $ (3,404) | $ (6,381) | $ (1,805)
Effect on profit or loss from increase in exchange rate | 3,404 | 6,381 | 1,805
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | COP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | (235) | (426) | (286)
Effect on profit or loss from increase in exchange rate | 235 | 426 | 286
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | CLP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | (552) | (717) | (546)
Effect on profit or loss from increase in exchange rate | 552 | 717 | 546
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | MXN/BRL |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on profit or loss from decrease in exchange rate | (123) | (238) | (177)
Effect on profit or loss from increase in exchange rate | 123 | $ 238 | $ 177
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | 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 | (1,049) |  |
Effect on profit or loss from increase in exchange rate | $ 1,049 |  |
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] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Effect on profit or loss from decrease in exchange rate | $ (4,931) | $ (8,827) | $ (3,833)
Increase in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Effect on profit or loss from increase in exchange rate | $ 4,931 | $ 8,827 | $ 3,833
Coca-Cola FEMSA | Cross-currency swaps | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (2,300) | (2,161) | (645)
Effect on equity from increase in exchange rate | 2,300 | 2,161 | 645
Coca-Cola FEMSA | Cross-currency swaps | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate | (1,645) | (5,507) | (2,315)
Effect on equity from increase in exchange rate | $ 1,645 | $ 5,507 | $ 2,315
Coca-Cola FEMSA | Net Cash In Foreign Currency | U S dollar |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 18.00% | 8.00%
Effect on profit or loss from decrease in exchange rate | $ (3,200) | $ (5,755) | $ (940)
Increase in exchange rate, as a percent | 11.00% | 18.00% | 8.00%
Effect on profit or loss from increase in exchange rate | $ 3,200 | $ 5,755 | $ 940
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] |  |  |
Change in commodity price, as a percent | 28.00% | 32.00% | 24.00%
Effect on equity from change in commodity price | $ (714) | $ (515) | $ (255)
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] |  |  |
Change in commodity price, as a percent | 24.00% | 16.00% | 15.00%
Effect on equity from change in commodity price | $ (39) | $ (289) | $ (1,164)
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward agreements to purchase foreign currency | MXN/EUR |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent |  |  | 9.00%
Effect on equity from decrease in exchange rate |  |  | $ (57)
Increase in exchange rate, as a percent |  |  | 9.00%
Effect on equity from increase in exchange rate | $ 4 |  | $ 57
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward agreements to purchase foreign currency | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 16.00% | 21.00% |
Effect on equity from decrease in exchange rate | $ (37) | $ (240) |
Increase in exchange rate, as a percent |  | 21.00% |
Effect on equity from increase in exchange rate | $ 37 | $ 240 |
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward agreements to purchase foreign currency | BRL/USD. |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Increase in exchange rate, as a percent | 16.00% |  |
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward agreements to purchase foreign currency | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 19.00% |
Effect on equity from decrease in exchange rate | $ (4) | $ (327) |
Increase in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Effect on equity from increase in exchange rate |  | $ 327 |
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Forward agreements to purchase foreign currency | CLP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Increase in exchange rate, as a percent |  |  | 11.00%
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent |  |  | 11.00%
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Increase in exchange rate, as a percent | 11.00% | 19.00% |
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | COP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 16.00% | 10.00%
Increase in exchange rate, as a percent | 11.00% | 16.00% | 10.00%
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | CLP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 13.00% | 13.00% |
Increase in exchange rate, as a percent | 13.00% | 13.00% |
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | MXN/BRL |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 15.00% | 19.00% | 13.00%
Increase in exchange rate, as a percent | 15.00% | 19.00% | 13.00%
Foreign currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | EUR/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 6.00% |  |
Increase in exchange rate, as a percent | 6.00% |  |
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 16.00% | 21.00% | 13.00%
Effect on equity from decrease in exchange rate | $ (284) | $ (357) | $ (202)
Increase in exchange rate, as a percent | 16.00% | 21.00% | 13.00%
Effect on equity from increase in exchange rate | $ 284 | $ 357 | $ 202
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | BRL/USD. |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity from decrease in exchange rate |  |  | (155)
Effect on equity from increase in exchange rate |  |  | $ 155
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Effect on equity from decrease in exchange rate | $ (298) | $ (884) | $ (739)
Increase in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Effect on equity from increase in exchange rate | $ 298 | $ 884 | $ 739
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | COP/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 16.00% | 10.00%
Effect on equity from decrease in exchange rate | $ (81) | $ (142) | $ (54)
Increase in exchange rate, as a percent | 11.00% | 16.00% | 10.00%
Effect on equity from increase in exchange rate | $ 81 | $ 142 | $ 54
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | URY/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 4.00% | 9.00% | 5.00%
Effect on equity from decrease in exchange rate | $ (7) | $ (21) | $ (23)
Increase in exchange rate, as a percent | 4.00% | 9.00% | 5.00%
Effect on equity from increase in exchange rate | $ 7 | $ 21 | $ 23
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | ARS/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 1.00% | 2.00% | 25.00%
Effect on equity from decrease in exchange rate | $ (3) | $ (2) | $ (88)
Increase in exchange rate, as a percent | 1.00% | 2.00% | 25.00%
Effect on equity from increase in exchange rate | $ 3 | $ 2 | $ 88
Foreign currency risk | Coca-Cola FEMSA | Forward agreements to purchase foreign currency | CRC/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 3.00% |  |
Effect on equity from decrease in exchange rate | $ (10) |  |
Increase in exchange rate, as a percent | 3.00% |  |
Effect on equity from increase in exchange rate | $ 10 |  |
Foreign currency risk | Coca-Cola FEMSA | Cross-currency swaps | BRL/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 16.00% | 21.00% | 13.00%
Increase in exchange rate, as a percent |  | 21.00% | 13.00%
Foreign currency risk | Coca-Cola FEMSA | Cross-currency swaps | MXN/USD |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Decrease in exchange rate, as a percent | 11.00% | 19.00% | 9.00%
Increase in exchange rate, as a percent | 11.00% | 19.00% | 9.00%

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