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Cover Page
 12 Months Ended
Dec. 31, 2021
shares
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2021
Document Fiscal Year Focus 2021
Document Fiscal Period Focus FY
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Entity Registrant Name AMERICA MOVIL SAB DE CV/
Entity Central Index Key 0001129137
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Entity Voluntary Filers No
Entity Interactive Data Current Yes
Entity Address, Country MX
ICFR Auditor Attestation Flag true
Document Accounting Standard International Financial Reporting Standards
Entity Address, Address Line One Lago Zurich 245
Entity Address, Address Line Two Plaza Carso / Edificio Telcel
Entity Address, Address Line Three Colonia Ampliación Granada
Entity Address, City or Town Mexico City
Entity Address, Postal Zip Code 11529
Entity File Number 1-16269
Entity Incorporation, State or Country Code O5
Auditor Name Mancera, S.C.
Auditor Firm ID 1284
Auditor Location Mexico City, Mexico
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Country MX
City Area Code 5255
Local Phone Number 2581-3700
Contact Personnel Name Daniela Lecuona Torras
Contact Personnel Email Address daniela.lecuona@americamovil.com
Contact Personnel Fax Number 2581-4422
Entity Address, Address Line One Lago Zurich 245
Entity Address, Address Line Two Plaza Carso / Edificio Telcel, Piso 16
Entity Address, Address Line Three Colonia Ampliación Granada
Entity Address, City or Town Mexico City
Entity Address, Postal Zip Code 11529
AA Shares [member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 20,555
A Shares [member]  
Document Information [Line Items]  
Trading Symbol AMOV
Security Exchange Name NYSE
Entity Common Stock, Shares Outstanding 502
Title of 12(b) Security A Shares, without par value
L Shares [member]  
Document Information [Line Items]  
Trading Symbol AMX
Security Exchange Name NYSE
Entity Common Stock, Shares Outstanding 45,582
Title of 12(b) Security L Shares, without par value
3.625% Senior Notes Due 2029 [Member]  
Document Information [Line Items]  
Trading Symbol AMX29
Security Exchange Name NYSE
Title of 12(b) Security 3.625% Senior Notes Due 2029
2.875% Senior Notes Due 2030 [Member]  
Document Information [Line Items]  
Trading Symbol AMX30
Security Exchange Name NYSE
Title of 12(b) Security 2.875% Senior Notes Due 2030
6.375% Notes Due 2035 [Member]  
Document Information [Line Items]  
Trading Symbol AMX35
Security Exchange Name NYSE
Title of 12(b) Security 6.375% Notes Due 2035
6.125% Notes Due 2037 [Member]  
Document Information [Line Items]  
Trading Symbol AMX37
Security Exchange Name NYSE
Title of 12(b) Security 6.125% Notes Due 2037
6.125% Senior Notes Due 2040 [Member]  
Document Information [Line Items]  
Trading Symbol AMX40
Security Exchange Name NYSE
Title of 12(b) Security 6.125% Senior Notes Due 2040
4.375% Senior Notes Due 2042 [Member]  
Document Information [Line Items]  
Trading Symbol AMX42
Security Exchange Name NYSE
Title of 12(b) Security 4.375% Senior Notes Due 2042
4.375% Senior Notes Due 2049 [Member]  
Document Information [Line Items]  
Trading Symbol AMX49
Security Exchange Name NYSE
Title of 12(b) Security 4.375% Senior Notes Due 2049