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Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices (Tables)
 12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Summary of Equity Interest in Most Significant Subsidiaries
The equity interest in the most significant subsidiaries at December 31, 2020 and 2021 is as follows:
 
Company name
   
Country
     
Equity
interest at
December 31
  
  
2020
    
2021
  
Subsidiaries:
                          
América Móvil B.V.
a)
      Netherlands        100.0 %      100.0 % 
Compañía Dominicana de Teléfonos, S.A. (“Codetel”)
b)
      Dominican Republic        100.0 %      100.0 % 
Sercotel, S.A. de C.V.
a)
      Mexico        100.0 %      100.0 % 
Radiomóvil Dipsa, S.A. de C.V. and subsidiaries (“Telcel”)
b)
      Mexico        100.0 %      100.0 % 
Puerto Rico Telephone Company, Inc.
b)
      Puerto Rico        100.0 %      100.0 % 
Servicios de Comunicaciones de Honduras, S.A. de C.V. (“Sercom Honduras”)
b)
      Honduras        100.0 %      100.0 % 
TracFone Wireless, Inc. (“TracFone”)
b) c)
      USA        100.0 %      —    
Claro S.A. (Claro Brasil)
b)
      Brazil        98.2 %      98.2 % 
NII Brazil Holding S.A.R.L
a)
      Luxembourg        100.0 %      100.0 % 
Nextel Telecomunicações Ltda
b)
      Brazil        100.0 %      100.0 % 
Telecomunicaciones de Guatemala, S.A. (“Telgua”)
b)
      Guatemala        99.3 %      99.3 % 
Claro Guatemala, S.A.
b)
      Guatemala        100.0 %      100.0 % 
Empresa Nicaragüense de Telecomunicaciones, S.A. (“Enitel”) 
b)
      Nicaragua        99.6 %      99.6 % 
Compañía de Telecomunicaciones de El Salvador, S.A. de C.V. (“CTE”)
b)
      El Salvador        95.8 %      95.8 % 
Comunicación Celular, S.A. (“Comcel”)
b)
      Colombia        99.4 %      99.4 % 
Consorcio Ecuatoriano de Telecomunicaciones, S.A. (“Conecel”) 
b)
      Ecuador        100.0 %      100.0 % 
AMX Argentina, S.A.
b)
      Argentina        100.0 %      100.0 % 
AMX Paraguay, S.A.
b)
      Paraguay        100.0 %      100.0 % 
AM Wireless Uruguay, S.A.
b)
      Uruguay        100.0 %      100.0 % 
Claro Chile, S.A.
b)
      Chile        100.0 %      100.0 % 
América Móvil Perú, S.A.C
b)
      Peru        100.0 %      100.0 % 
Claro Panamá, S.A.
b)
      Panamá        100.0 %      100.0 % 
Teléfonos de México, S.A.B. de C.V.
b)
      Mexico        98.8 %      98.8 % 
Telekom Austria AG
b)
      Austria        51.0 %      51.0 % 
 
a)
Holding companies
b)
Operating companies of mobile and fixed services
c)
On November 23, 2021, this entity was discontinued operations. See Note 2Ac. 
Summary of Annual Depreciation Rates
Annual depreciation rates are as follows:
 
Network infrastructure
      5%-33%  
Buildings and leasehold improvement
      2%-33%  
Other assets
      10%-50%  
Summary of Most Significant Forward Looking Estimates Used for Impairment Evaluations
The most significant forward-looking estimates used for the 2020 and 2021 impairment evaluations are shown below:
 
    
Average margin on
EBIDTA
    
Average margin on
CAPEX
    
Average pre-tax
discount rate
(WACC)
  
2020:
                         
Europe (7 countries)
     
32.20% - 40.76%
      
7.04% - 19.39%
      
3.88% - 12.02%
  
Brazil (fixed line, wireless and TV)
      40.67%       25.36%       9.50%  
Puerto Rico
      23.06%       14.57%       3.53%  
Dominican Republic
      47.57%       13.71%       8.27%  
Mexico (fixed line and wireless)
      32.69%       11.01%       6.03%  
Ecuador
      49.23%       11.14%       17.50%  
Peru
      38.72%       15.43%       4.76%  
El Salvador
      45.92%       21.19%       14.63%  
Chile
      26.34%       13.18%       3.37%  
Colombia
      43.45%       18.19%       6.44%  
Other countries
     
10.07% - 47.23%
      
0.48% - 31.67%
      
3.42% - 21.85%
  
2021:
                         
Europe (7 countries)
   
 
31.60% - 45.32%
 
  
 
7.48% - 24.37%
 
  
 
2.91% - 9.83%
 
Brazil (fixed line, wireless and TV)
   
 
41.37%
 
  
 
22.98%
 
  
 
4.62%
 
Puerto Rico
   
 
21.54%
 
  
 
14.36%
 
  
 
3.00%
 
Dominican Republic
   
 
52.02%
 
  
 
13.86%
 
  
 
5.84%
 
Mexico (fixed line and wireless)
   
 
36.21%
 
  
 
15.89%
 
  
 
6.24%
 
Ecuador
   
 
44.76%
 
  
 
12.48%
 
  
 
14.48%
 
Peru
   
 
36.63%
 
  
 
17.19%
 
  
 
3.99%
 
El Salvador
   
 
44.82%
 
  
 
24.25%
 
  
 
10.78%
 
Chile
   
 
27.36%
 
  
 
17.98%
 
  
 
2.81%
 
Colombia
   
 
43.36%
 
  
 
23.18%
 
  
 
7.18%
 
Other countries
   
 
30.55% - 48.52%
 
  
 
4.91% - 30.03%
 
  
 
4.64% - 14.39%
 
Summary of quantitative information about right-of-use assets Right-of-use assets are depreciated on a straight-line basis over the shorter of the lease term and the estimated useful lives of the assets, as follows:
Assets    Useful life
Towers and sites
    5 to 12 years
Property
    10 to 25 years
Other equipment
    5 to 15 years
Summary of Exchange Rates Used forTranslation of Foreign Currencies
The exchange rates used for the translation of foreign currencies against the Mexican peso are as follows:
 
         
Average exchange rate
     
Closing exchange rate
at December 31,
  
Country or Zone
   
Currency
    2019      2020     
2021
      2020     
2021
  
Argentina
(1)
    Argentine Peso (AR$)      0.4110        0.3070     
 
0.2137
 
      0.2371     
 
0.2004
 
Brazil    Real (R$)      4.8907        4.1850     
 
3.7625
 
      3.8387     
 
3.6885
 
Colombia    Colombian Peso (COP$)      0.0059        0.0058     
 
0.0054
 
      0.0058     
 
0.0052
 
Guatemala    Quetzal      2.5023        2.7826     
 
2.6212
 
      2.5596     
 
2.6666
 
U.S.A.
(2)
    US Dollar      19.2641        21.4860     
 
20.2769
 
      19.9487     
 
20.5835
 
Uruguay    Uruguay Peso      0.5479        0.5110     
 
0.4655
 
      0.4712     
 
0.4605
 
Nicaragua    Cordoba      0.5817        0.6257     
 
0.5765
 
      0.5728     
 
0.5795
 
Honduras    Lempira      0.7806        0.8678     
 
0.8384
 
      0.8215     
 
0.8396
 
Chile    Chilean Peso      0.0275        0.0271     
 
0.0268
 
      0.0281     
 
0.0244
 
Paraguay    Guaraní      0.0031        0.0032     
 
0.0030
 
      0.0029     
 
0.0030
 
Peru    Sol (PEN$)      5.7708        6.1483     
 
5.2297
 
      5.5046     
 
5.1484
 
Dominican Republic    Dominican Peso      0.3737        0.3766     
 
0.3540
 
      0.3416     
 
0.3570
 
Costa Rica    Colon      0.0326        0.0366     
 
0.0325
 
      0.0323     
 
0.0319
 
European Union    Euro      21.5642        24.5080     
 
23.9835
 
      24.3693     
 
23.4220
 
Bulgaria    Lev      11.0257        12.5284     
 
12.2617
 
      12.4594     
 
11.9762
 
Belarus    New Belarusian Ruble      9.2159        8.8172     
 
7.9932
 
      7.5721     
 
8.0279
 
Croatia    Croatian Kuna      2.9069        3.2498     
 
3.1852
 
      3.2279     
 
3.1161
 
Macedonia    Macedonian Denar      0.3504        0.3975     
 
0.3893
 
      0.3950     
 
0.3800
 
Serbia    Serbian Denar      0.1830        0.2083     
 
0.2040
 
      0.2071     
 
0.1992
 
 
(1)
Year-end rates are used for the translation of revenues and expenses if IAS 29
“Financial Reporting in Hyperinflationary Economies”
is applied.
Financial reporting in hyperinflationary economies
Financial statements of Argentina subsidiaries are restated before translation to the reporting currency of the Company and before consolidation in order to reflect the same value of money for all items. Items recognized in the statements of financial position which are not measured at the applicable year-end measuring unit are restated based on the general price index. All non-monetary items measured at cost or amortized cost is restated for the changes in the general price index from the date of transaction or the last hyperinflationary calculation to the reporting date. Monetary items are not restated. All items of shareholders’ equity are restated for the changes in the general price index since their addition or the last hyperinflationary calculation until the end of the reporting period. All items of comprehensive income are restated for the change in a general price index from the date of initial recognition to the reporting date. Gains and losses resulting from the net-position of monetary items are reported in the consolidated
Summary of Net profit for the year from discontinued operations
Additionally, TracFone represented the U.S.A. segment until November 23, 2021. With TracFone being classified as discontinued operations, the U.S.A. segment is no longer presented in the segment note. The results of TracFone for the year are presented below:
 
 
 
For the years ended December 31
 
 
2019
 
 
2020
 
 
2021
 
Operating revenues:
                         
Service revenues
    Ps. 131,403,268     Ps. 149,376,532    
Ps.
 130,091,540  
Sales of equipment
      24,461,125       27,802,837       22,160,481  
    
 
 
    
 
 
    
 
 
  
       155,864,393       177,179,369       152,252,021  
Total costs and expenses
      144,822,141       157,327,836       134,495,316  
    
 
 
    
 
 
    
 
 
  
Operating income
      11,042,252       19,851,533       17,756,705  
    
 
 
    
 
 
    
 
 
  
Financial cost
      (77,884 )      (2,026 )      (1,733
) 
Gain on disposal of discontinued operations
      —         —         132,821,709  
    
 
 
    
 
 
    
 
 
  
Profit before income tax discontinued operations
      10,964,368       19,849,507       150,576,681  
    
 
 
    
 
 
    
 
 
  
Tax expense:
                     
 
  
Related to pre-tax profit from the ordinary activities for the period
      1,119,479       2,856,882       2,571,541  
Related to gain on disposal from discontinued operations
      —         —       26,294,422  
    
 
 
    
 
 
    
 
 
  
Net profit for the year from discontinued operations
    Ps. 9,844,889    
Ps.

 16,992,625    
Ps.
 121,710,718  
    
 
 
    
 
 
    
 
 
  
Summary of assets and liabilities deconsolidated on the date of the disposal
The assets and liabilities deconsolidated on the date of the disposal were as follows:
 
 
  
November 23,
 
 
  
2021
 
Current assets
         
Cash
   
Ps.
338,439
 
Subscribers, distributors, recoverable taxes, contract assets and other net
   
 
12,368,407
 
Inventories, net
   
 
9,604,658
 
Other current assets, net
   
 
389,052
 
    
 
 
  
Total current assets
   
 
22,700,556
 
Non-current assets:
         
Property, plant and equipment
   
 
1,989,498
 
Intangibles, net
   
 
555,012
 
Goodwill
   
 
2,695,557
 
Deferred income taxes
   
 
1,094,756
 
Other assets, net
   
 
327,546
 
Rights of use
   
 
1,625
 
    
 
 
  
Total assets
   
Ps.
29,364,550
 
    
 
 
  
Short term liability related to rigth of use of assets
   
Ps.
1,625
 
Accounts payable
   
 
17,446,513
 
Income tax
   
 
3,267,585
 
Deferred revenue
   
 
13,187,667
 
    
 
 
  
Total liabilities
   
 
33,903,390
 
    
 
 
  
Net
liability
directly associated with disposal group
   
Ps.
(4,538,840
) 
    
 
 
  
Summary of Retrospective adjustments
The Company reclassified Ps. 4,540,344
from current
equity investments at fair value through other comprehensive income (OCI) to non-current
debt instruments at fair value through other comprehensive income (OCI)
as of December 31, 2020.