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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2025
Income Taxes [Abstract]  
Composition of Income Tax Expense
The composition of income tax expense for the years ended December 31, 2023, 2024 and 2025 is as follows:

 
2023
  
2024
  
2025
  
Income Tax attributable
            
In Mexico:
            
Current year income tax
Ps.
32,327,958  
Ps.
29,105,637  
Ps.
27,186,836  
Deferred income tax
    
(6,706,412
)
    
(12,286,894
)
    
3,543,636
  
Foreign:
                        
Current year income tax
    
16,026,324
      
19,053,257
      
20,225,100
  
Deferred income tax
    
(7,103,867
)
    
(633,557
)
    
2,914,617
  
Total income tax
Ps.
34,544,003  
Ps.
35,238,443  
Ps.
53,870,189  
Deferred Tax Income (expense) Related to Items Recognized In OCI
Deferred tax income / (expense) related to items recognized in OCI during the year:

 
For the years ended December 31,
  
 
2023
  
2024
  
2025
  
Remeasurement of defined benefit plans
Ps.
(975,061 )
Ps.
6,328,961  
Ps.
9,246,387  
Equity investments at fair value
    
2,836,366
      
(7,491,232
)
    
1,989,858
  
Revaluation of Assets
    —
       (495,646 )     (364,248 )
                         
Deferred tax  income/ (expense) recognized in OCI
Ps.
1,861,305  
Ps.
(1,657,917 )
Ps.
10,871,997  
Reconciliation of Statutory Income Tax Rate and Effective Tax Rate 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,
  
   
2023
    
2024
    
2025
  
Statutory income tax rate in Mexico
    
30.0
%
    
30.0
%
    
30.0
%
Impact of non-deductible and non-taxable items:
                        
Tax inflation effects
    
2.1
%
    
4.9
%
    
2.9
%
Derivatives
    
0.3
%
    
1.3
%
    
0.0
%
Employee benefits
    
1.5
%
    
5.7
%
    
2.0
%
Other non-deductible items
    
—
      
8.6
%
    
0.8
%
Other
     4.8 %     1.4 %     2.9 %
Effective tax rate on Mexican operations
    
38.7
%
    
51.9
%
    
38.6
%
Tax recoveries and NOL’s in Brazil
    
(3.5
)%
    
(1.5
)%
    
(2.3
)%
Foreign subsidiaries and other non-deductible items, net
    
(2.2
)%
    
8.8
%
    
3.8
%
Tax rates differences
    
(3.1
)%
    
(3.1
)%
    
(2.2
)%
 Effective tax rate
     29.9 %     56.1 %     37.9 %
Breakdown of Net Deferred Tax Assets
The breakdown of net deferred tax assets is as follows:

 
Consolidated statements of financial position
  
Consolidated statements of comprehensive income
 
 
2024
  
2025
  
2023
  
2024
  
2025
  
Provisions
  Ps.
39,976,016
       42,249,203
      Ps. 15,065,996
      Ps. (2,577,054)    
Ps.
 3,197,801
  
Deferred revenues
    
13,475,756
      
10,920,652
      
1,767
      
560,731
      
(567,417
)
Tax losses carry forward
    
38,397,674
      
36,074,254
      
8,575,209
      
508,256
      
(838,294
)
Property, plant and equipment (1)
    
(3,830,404
)
    
(7,029,432
)
    
2,157,776
      
(239,696
)
    
(3,627,587
)
Inventories
    
965,844
      
1,008,997
      
669,382
      
12,715
      
(81,788
)
Licenses and rights of use (1)
    
(13,293,040
)
    
(10,881,635
)
    
141,060
      
372,803
      
1,125,217
  
Employee benefits
    
35,455,273
      
46,495,509
      
(3,224,333
)
    
(3,431,627
)
    
101,681
  
Other
    
14,338,351
      
13,069,928
      
(9,576,577
)
    
17,714,323
      
(5,767,866
)
                                         
Net deferred tax assets
   Ps.
125,485,470       131,907,476                          
                                         
Deferred tax benefit (loss) in net profit for the year
      Ps. 13,810,280      Ps. 12,920,451      
Ps.
 (6,458,253 )


 (1)
As of December 31, 2024 and 2025, the balance included the effects of hyperinflation and revaluation of telecommunications towers.
Reconciliation of Deferred Tax Assets and Liabilities, Net
Reconciliation of deferred tax assets and liabilities, net:

 
2024
  
2025
  
Opening balance as of January 1,
   Ps.
116,614,520     Ps. 
125,485,470  
Deferred tax benefit
    
12,920,451
      
(6,458,253
)
Translation effect
    
(4,202,773
)
    
2,005,541
  
Deferred tax income recognized in OCI
    
(1,657,917
)
    
10,871,997
  
Deferred taxes acquired in business combinations
    
1,811,189
      
2,721
  
                 
Closing balance as of December 31,
   Ps.
125,485,470     Ps. 
131,907,476  
                 
Presented in the consolidated statements of financial position as follows:
                
Deferred income tax assets
    Ps. 153,217,164      Ps. 159,387,970  
Deferred income tax liabilities
    
(27,731,694
)
    
(27,480,494
)
                 
 
    Ps. 125,485,470
      Ps. 131,907,476
  
Available Tax Loss Carryforwards Recorded in Deferred Tax Assets
a) At December 31, 2025, 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, 2025
    
Tax-effected
loss carryforward
benefit
  
Brazil
  
Ps.
79,615,782    
Ps.
27,069,366  
Mexico
    
24,073,142
      
7,221,943
  
Chile
    
3,134,305
      
846,262
  
Others
    
3,946,235
      
936,683
  
                 
Total
  
Ps.
110,769,464    
Ps. 
 36,074,254