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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Summary of Composition of Income Tax Expense
The composition of income tax expense (benefit) for the years ended December 31, 2019, 2020 and 2021 is as follows:
 
 
  
2019
 
 
2020
 
 
2021
 
In Mexico:
  
 
 
Current year income tax
    Ps. 26,295,431     Ps. 13,407,948    
Ps.
24,355,240
 
Deferred income tax
      208,658       (9,334,246 )   
 
(5,079,397
) 
Foreign:
                         
Current year income tax
      19,830,227       12,319,690    
 
23,412,990
 
Deferred income tax
      3,579,739       (2,884,122 )   
 
(14,544,064
) 
    
 
 
    
 
 
    
 
 
  
Total Income tax
    Ps. 49,914,055     Ps. 13,509,270    
Ps.
28,144,769
 
Income Tax attributable to a discontinued operation
                         
Income tax discontinued operations in Mexico
(1)
      —         —         (26,294,422 ) 
Income tax discontinued operations Foreign
(1)
      (1,119,479 )      (2,856,882 )      (2,571,541 ) 
 
Summary of Deferred Tax Related to Items Recognized in OCI
Deferred tax related to items recognized in OCI during the year:
 
    
For the years ended December 31,
  
     2019      2020     
2021
  
Remeasurement of defined benefit plans
    Ps. 9,217,320      Ps. 4,151,600     
Ps.
(4,760,089
) 
Equity investments at fair value
      (378,606 )       (665,814 )    
 
583,892
 
Other
      —          (35,670 )    
 
—  
 
Revaluation assets
      —          (29,922,597 )    
 
—  
 
    
 
 
     
 
 
     
 
 
  
Deferred tax benefit recognized in OCI
    Ps. 8,838,714      Ps. (26,472,481 )    
Ps.
(4,176,197
) 
    
 
 
     
 
 
     
 
 
  
Summary of Reconciliation of Statutory Income Tax Rate in Mexico to Consolidated Effective Income Tax Rate Recognized
A reconciliation of the statutory income tax rate in Mexico to the consolidated effective income tax rate recognized by the Company is as follows:
 
    
Year ended December 31,
  
     2019     2020    
2021
  
Statutory income tax rate in Mexico
      30.0 %      30.0 %   
 
30.0
% 
Impact of non-deductible and non-taxable items:
                         
Tax inflation effects
      3.8 %      8.6 %   
 
7.9
% 
Derivatives
      (0.1 %)      (1.0 %)   
 
(0.9
%) 
Employee benefits
      2.0 %      4.2 %   
 
2.6
% 
Other
      2.0 %      (3.4 %)   
 
(2.9
%) 
    
 
 
    
 
 
    
 
 
  
Effective tax rate on Mexican operations
      37.7 %      38.4 %   
 
36.7
%
Tax recoveries in Brazil
      —         (13.2 %)   
 
(10.8
%) 
Dividends received from associates Equity
      (0.5 %)      (1.3 %)   
 
(0.7
%)
Foreign subsidiaries and other non-deductible items, net
      8.0 %      4.5 %   
 
2.2
% 
    
 
 
    
 
 
    
 
 
  
Effective tax rate from continuing operations

      45.2 %      28.4 %   
 
27.4
% 
Effective tax rate from discontinued operations

      10.2 %      14.4 %   
 
19.2
% 
Summary of Analysis of Temporary Differences Giving Rise to Net Deferred Tax Liability
An analysis of temporary differences giving rise to the net deferred tax
assets
is as follows:
 
    
Consolidated statements
of financial position
    
Consolidated statements of net income
  
   2020    
2021
     2019     2020    
2021
  
Provisions
   
Ps.

 19,312,081    
Ps.
18,038,607
 
   Ps. 318,843    
Ps.
 3,887,471    
Ps.
2,324,227
 
Deferred revenues
      6,748,101    
 
9,041,137
 
     (1,077,259 )      897,762    
 
2,202,413
 
Tax losses carry forward
      25,121,933    
 
33,954,926
 
     (9,873 )      2,236,244    
 
10,352,978
 
Property, plant and equipment 
(1)
      (39,459,549 )   
 
(33,445,815
) 
     (1,067,307 )     3,990,750    
 
9,246,429
 
Inventories
      (537,404 )   
 
135,658
 
     (55,380 )      (2,394,485 )   
 
814,626
 
Licenses and rights of
use 
(1)
      (5,177,924 )   
 
(3,668,389
) 
     432,403       344,729    
 
(151,013
) 
Employee benefits
      45,467,827    
 
40,246,031
 
     (1,019,042 )      422,473    
 
(354,803
) 
Other
      14,828,012    
 
13,520,684
 
     (1,310,782 )      2,833,424    
 
(4,811,396
) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Net deferred tax assets
   
Ps.

 66,303,077    
Ps.
77,822,839
 
                        
    
 
 
    
 
 
                          
Deferred tax expense in net profit for the year
 
   Ps. (3,788,397 )  
Ps.
 12,218,368    
Ps.
19,623,461
 
Deferred tax discontinued operations
 
     (105,986 )     73,646  
 
143,482
 
     
 
 
    
 
 
    
 
 
  
 
(1)
As of December 31, 2020 and 2021, the balance included the effects of hyperinflation and revaluation of telecommunications towers.
Summary of Reconciliation of Deferred Tax Assets and Liabilities, Net
Reconciliation of deferred tax assets and liabilities, net:
 
     2019     2020    
2021
  
Opening balance as of January 1,
    Ps. 86,613,327     Ps. 88,074,856    
Ps.
66,303,077
 
Deferred tax benefit
      (3,894,383 )      12,292,014    
 
19,623,461
 
Translation effect
      2,047,915       375,105    
 
(727,099
) 
Deferred tax benefit recognized in OCI
      8,838,714       (26,472,481 )   
 
(4,176,197
) 
Deferred taxes acquired in business combinations
      (276,568 )      (2,580,552 )   
 
—  
  
Hyperinflationary effect in Argentina
      (5,254,149 )      (5,385,865 )   
 
(3,540,962
) 
Disposals see to 2Ac
      —         —      
 
(1,203,203
) 
Related discontinued operation
      —         —      
 
1,543,762
 
    
 
 
    
 
 
    
 
 
  
Closing balance as of December 31,
    Ps.  88,074,856     Ps.  66,303,077    
Ps.
 77,822,839
 
    
 
 
    
 
 
    
 
 
  
Presented in the consolidated statements of financial position as follows:
                         
Deferred income tax assets
    Ps. 106,167,897     Ps. 115,370,240    
Ps.
127,287,934
 
Deferred income tax liabilities
      (18,093,041 )      (49,067,163 )   
 
(49,465,095
) 
    
 
 
    
 
 
    
 
 
  
     Ps. 88,074,856     Ps. 66,303,077    
Ps.
77,822,839
 
    
 
 
    
 
 
    
 
 
  
Available Tax Loss Carryforwards Recorded in Deferred Tax Assets
a) At December 31, 2021, the available tax loss carryforwards recorded in deferred tax assets are as follows on a country by country basis:
 
Country
   
Gross balance
of available tax loss
carryforwards at
December 31, 2021
     
Tax-effected
loss carryforward
benefit
  
Brazil
     
Ps.71,910,653
 
     
Ps.24,449,622
 
Mexico
   
 
14,768,325
 
   
 
4,430,497
 
Europe
   
 
2,031,465
 
   
 
507,866
 
United States
   
 
432,301
 
   
 
112,398
 
Peru
   
 
356,133
 
   
 
105,060
 
Chile
   
 
16,109,194
 
   
 
4,349,483
 
    
 
 
     
 
 
  
Total
     
Ps.105,608,071
 
     
Ps.33,954,926