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Balances and Transactions with Related Parties and Affiliated Companies - Transactions (Detail) - MXN ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of transactions between related parties [line items] |  |  |
Expense resulting from the uncollectibility of balances due from related parties | $ 0 | $ 0 | $ 0
Expenses: |  |  |
Other expenses with related parties | 619 | 319 | 423
Other revenue [member] |  |  |
Income: |  |  |
Income from related party transaction | 764 | 404 | 242
The Coca-Cola Company [member] |  |  |
Expenses: |  |  |
Contributions | 1,482 | 2,274 | 3,542
The Coca-Cola Company [member] | Concentrate [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 32,222 | 34,063 | 32,379
The Coca-Cola Company [member] | Advertising [Member] |  |  |
Expenses: |  |  |
Services received, related party transaction | 865 | 1,756 | 2,193
Heineken Group |  |  |
Income: |  |  |
Income from related party transaction | 3,181 | 3,380 | 3,265
Heineken Group | Beer [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 23,233 | 25,215 | 27,999
Grupo Industrial Saltillo, S.A. de C.V. [member] | Logistic services [member] |  |  |
Income: |  |  |
Income from related party transaction |  |  | 255
Jugos del Valle, S.A.P.I. de C.V. [member] | Logistic services [member] |  |  |
Income: |  |  |
Income from related party transaction | 532 | 553 | 369
Jugos del Valle, S.A.P.I. de C.V. [member] | Juices [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 4,055 | 4,477 | 4,537
Grupo Industrial Bimbo, S.A.B. de C. V. [member] | Baked goods and snacks [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 5,774 | 6,194 | 5,763
Promotora Industrial Azucarera, S.A. de C.V. [member] | Sugar [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 2,123 | 2,728 | 2,604
BBVA Bancomer, S.A. de C.V. [member] |  |  |
Expenses: |  |  |
Interest expense and fee paid to related party transaction | 232 | 144 | 230
BBVA Bancomer, S.A. de C.V. [member] | Interest Revenue [Member] |  |  |
Expenses: |  |  |
Interest expense and fee paid to related party transaction | 1,825 | 1,456 | 1,469
Beta San Miguel [member] | Sugar [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 1,023 | 655 | 651
Promotora Mexicana de Embotelladores, S.A. de C.V. [member] | Sugar, cans and aluminum lids [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction |  |  | 739
Industria Envasadora De Queretaro SA De CVIEQSA [member] | Canned products [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 226 | 682 | 596
Leao Alimentos e Bebidas, LTDA [member] | Inventory [member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 1,253 | 1,867 | 2,654
Ecolab Inc [Member] | Materials [Member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | 340 |  |
Grupo Televisa, S.A.B. de C.V. [member] | Advertising [Member] |  |  |
Expenses: |  |  |
Services received, related party transaction | 148 | 115 | 113
Grupo Nacional Provincial, S.A.B. [Member] |  |  |
Expenses: |  |  |
Services received, related party transaction | 7 |  | 12
Fundacion FEMSA, A.C. [member] |  |  |
Expenses: |  |  |
Donations to related party transactions | 171 | 195 | 232
Difusion y Fomento Cultural, A.C. [member] |  |  |
Expenses: |  |  |
Donations to related party transactions | 55 | 61 | 63
Donations to ITESM [member] |  |  |
Expenses: |  |  |
Donations to related party transactions | 310 | 215 | 192
Grupo Financiero Scotiabank Inverlat SA [Member] | Interest Revenue [Member] |  |  |
Expenses: |  |  |
Interest expense and fee paid to related party transaction | 295 | 447 |
AdeS Alimentos y Bebidas [Member] |  |  |
Expenses: |  |  |
Purchase of goods from related party transaction | $ 338 | $ 497 | $ 592

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