v3.25.1
Balances and Transactions with Related Parties and Affiliated Companies - Summary of Transactions and Other Related Parties (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income:      
Sales to affiliated parties $ 10,185 $ 8,459 $ 6,546
Expenses:      
Other expenses with related parties 0 0 0
Jugos del valle, S.A.P.I. de C.V.      
Expenses:      
Purchases and other expenses with related party 4,763 3,718 3,234
Promotora Industrial Azucarera, S.A. de C.V. ("PIASA")      
Expenses:      
Purchases and other expenses with related party 2,718 2,841 2,841
Beta San Miguel      
Expenses:      
Purchases and other expenses with related party 722 917 724
Industria Envasadora de Quertaro, S.A. de C.V. (IEQSA)      
Expenses:      
Purchases and other expenses with related party 989 843 577
Fountain Agua Mineral, LTDA      
Expenses:      
Purchases and other expenses with related party 1,143 638 0
Leao Alimentos e Bebidas, LTDA      
Expenses:      
Purchases and other expenses with related party 112 181 215
Industria Mexicana de Reciclaje, S.A. de C.V. ("IMER")      
Expenses:      
Purchases and other expenses with related party 356 458 504
Instituto Tecnologico Y de Estudios Superiores de Monterrey AC      
Expenses:      
Donations to related party 0 1 110
Fundacion FEMSA AC      
Expenses:      
Donations to related party 0 285 173
Heineken Group      
Income:      
Sales to affiliated parties 0 0 2
Expenses:      
Purchases of raw material, beer and operating expenses from Heineken 0 0 5,036
FEMSA      
Expenses:      
Purchases and other expenses with related party 7,196 9,547 10,129
The Coca-Cola Company      
Expenses:      
Purchases of concentrate from The Coca-Cola Company 54,502 46,461 43,717
Advertisement expense paid to The Coca-Cola Company $ 948 $ 869 $ 545