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Cover Page
 12 Months Ended
Dec. 31, 2020
shares
Document Information [Line Items]  
Document Type 20-F
Document Annual Report true
Document Registration Statement false
Document Transition Report false
Document Shell Company Report false
Document Period End Date Dec. 31, 2020
Current Fiscal Year End Date --12-31
Entity File Number 1-12260
Entity Registrant Name COCA COLA FEMSA SAB DE CV
Entity Incorporation, State or Country Code O5
Entity Address, Address Line One Calle Mario Pani No. 100
Entity Address, Address Line Two Santa Fe Cuajimalpa
Entity Address, City or Town Cuajimalpa de Morelos
Entity Address, Postal Zip Code 05348
Entity Address, Country MX
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Interactive Data Current Yes
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Amendment Flag false
Document Fiscal Year Focus 2020
Document Fiscal Period Focus FY
Entity Central Index Key 0000910631
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One Calle Mario Pani No. 100
Entity Address, Address Line Two Santa Fe Cuajimalpa
Entity Address, City or Town Cuajimalpa de Morelos
Entity Address, Postal Zip Code 05348
Entity Address, Country MX
Contact Personnel Name Jorge Alejandro Collazo Pereda
City Area Code 52-55
Local Phone Number 1519-6179
Contact Personnel Email Address kofmxinves@kof.com.mx
American Depositary Shares, each representing 10 units  
Document Information [Line Items]  
Trading Symbol KOF
Title of 12(b) Security American Depositary Shares, each representing 10 units
Security Exchange Name NYSE
Units, each consisting of 3 Series B shares and 5 Series L shares, without par value  
Document Information [Line Items]  
Title of 12(b) Security Units, each consisting of 3 Series B shares and 5 Series L shares, without par value
Series B shares, without par value  
Document Information [Line Items]  
Title of 12(b) Security Series B shares, without par value
Entity Common Stock, Shares Outstanding 1,575,624,195
Series L shares, without par value  
Document Information [Line Items]  
Title of 12(b) Security Series L shares, without par value
Entity Common Stock, Shares Outstanding 2,626,040,325
2.750% Senior Notes Due 2030  
Document Information [Line Items]  
No Trading Symbol Flag true
Title of 12(b) Security 2.750% Senior Notes due 2030
Security Exchange Name NYSE
1.850% Senior Notes Due 2023  
Document Information [Line Items]  
No Trading Symbol Flag true
Title of 12(b) Security 1.850% Senior Notes due 2032
Security Exchange Name NYSE
Series A shares, without par value  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 7,936,628,152
Series D shares, without par value  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 4,668,365,424