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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Summary of Composition of Income Tax Expense
The composition of income tax expense for the years ended December 31, 2018, 2019 and 2020 is as follows:
 

 
 
  
2018
 
  
2019
 
  
2020
 
In Mexico:
  
   
  
   
  
   
Current year income tax
  
Ps.
28,572,414
 
  
Ps.
26,295,431
 
  
Ps.
13,407,948
 
Deferred income tax
  
 
(2,688,727
) 
  
 
208,658
 
  
 
(9,334,246
) 
Foreign:
  
   
  
   
  
   
Current year income tax
  
 
19,898,728
 
  
 
20,843,720
 
  
 
15,250,218
 
Deferred income tax
  
 
694,664
 
  
 
3,685,724
 
  
 
(2,957,768
) 
 
  
 
 
 
  
 
 
 
  
 
 
 
 
  
Ps.
46,477,079
 
  
Ps.
51,033,533
 
  
Ps.
16,366,152
 
 
  
 
 
 
  
 
 
 
  
 
 
 
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,
 
 
  
2018
 
  
2019
 
  
2020
 
Remeasurement of defined benefit plans
  
 
Ps.   408,735
 
  
 
Ps.9,217,320
 
  
 
Ps.   4,151,600
 
Equity investments at fair value
  
 
1,613,667
 
  
 
(378,606
) 
  
 
(665,814
) 
Other
  
 
(8,922
) 
  
 
—  
 
  
 
(35,670
) 
Revaluation assets
  
 
—  
 
  
 
—  
 
  
 
(29,922,597
) 
 
  
 
 
 
  
 
 
 
  
 
 
 
Deferred tax benefit recognized in OCI
  
 
Ps.2,013,480
 
  
 
Ps.8,838,714
 
  
 
Ps.(26,472,481
) 
 
  
 
 
 
  
 
 
 
  
 
 
 
Summary of Reconciliation of Statutory Income Tax Rate in Mexico to Consolidated Effective Income Tax Rate Recognized
 
  
Year ended December 31,
 
 
  
2018
 
 
2019
 
 
2020
 
Statutory income tax rate in Mexico
  
 
30.0
% 
 
 
30.0
% 
 
 
30.0
% 
Impact of
 
non-deductible
 
and
 
non-taxable
 
items:
  
   
 
   
 
   
Tax inflation effects
  
 
7.3
% 
 
 
3.5
% 
 
 
6.1
% 
Derivatives
  
 
0.4
% 
 
 
(0.1
%) 
 
 
(0.7
%) 
Employee benefits
  
 
1.3
% 
 
 
1.8
% 
 
 
3.0
% 
Other
  
 
6.3
% 
 
 
1.8
% 
 
 
(2.4
%) 
 
  
 
 
 
 
 
 
 
 
 
 
 
Effective tax rate on Mexican operations
  
 
45.3
% 
 
 
37.0
% 
 
 
36.0
% 
Tax recoveries in Brazil
  
 
—  
 
 
 
—  
 
 
 
(9.3
%) 
Dividends received from associates Equity
  
 
(0.8
%) 
 
 
(0.4
%) 
 
 
(0.9
%) 
Foreign subsidiaries and other
 
non-deductible
 
items, net
  
 
1.5
% 
 
 
5.5
% 
 
 
(1.5
%) 
 
  
 
 
 
 
 
 
 
 
 
 
 
Effective tax rate
  
 
46.0
% 
 
 
42.1
% 
 
 
24.3
% 
 
  
 
 
 
 
 
 
 
 
 
 
 
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 liability is as follows:
 
 
 
Consolidated statements
of financial position
 
 
Consolidated statements of net income
 
 
2019
 
 
2020
 
 
2018
 
 
2019
 
 
2020
 
Provisions
 
Ps.
17,964,305
 
 
Ps.
19,312,081
 
 
Ps.
1,841,705
 
 
Ps.
(257,070
) 
 
Ps.
4,458,848
 
Deferred revenues
 
 
5,820,260
 
 
 
6,748,101
 
 
 
3,632,051
 
 
 
(1,077,259
) 
 
 
897,762
 
Tax losses carry forward
 
 
26,630,407
 
 
 
25,121,933
 
 
 
(5,833,660
) 
 
 
(9,873
) 
 
 
2,236,244
 
Property, plant and equipment 
(1)
 
 
(11,962,544
) 
 
 
(39,459,549
) 
 
 
453,493
 
 
 
(461,594
) 
 
 
3,524,761
 
Inventories
 
 
1,787,065
 
 
 
(537,404
) 
 
 
81,270
 
 
 
(291,531
) 
 
 
(2,393,979
) 
Licenses and rights of use 
(1)
 
 
(3,399,931
) 
 
 
(5,177,924
) 
 
 
961,402
 
 
 
432,403
 
 
 
344,729
 
Employee benefits
 
 
41,743,744
 
 
 
45,467,827
 
 
 
1,128,209
 
 
 
(1,019,042
) 
 
 
422,473
 
Other
 
 
9,491,550
 
 
 
14,828,012
 
 
 
(270,407
) 
 
 
(1,210,417
) 
 
 
2,801,176
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net deferred tax assets
 
Ps.
88,074,856
 
 
Ps.
66,303,077
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred tax expense in net profit for the year
 
 
Ps.
1,994,063
 
 
Ps.
(3,894,383
) 
 
Ps.
12,292,014
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
As of December 31, 2020 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:
 
 
  
2018
 
 
2019
 
 
2020
 
Opening balance as of January 1,
  
 
Ps. 104,573,985
 
 
 
Ps.  86,613,327
 
 
 
Ps.  88,074,856
 
Deferred tax benefit
  
 
1,994,063
 
 
 
(3,894,38
3
) 
 
 
12,292,014
 
Translation effect
  
 
(8,854,010
) 
 
 
2,047,91
5
 
 
 
375,105
 
Deferred tax benefit recognized in OCI
  
 
2,013,480
 
 
 
8,838,714
 
 
 
(26,472,481
) 
Deferred taxes acquired in business combinations
  
 
(25,827
) 
 
 
(276,568
) 
 
 
(2,580,552
) 
Hyperinflationary effect in Argentina
  
 
(4,907,151
) 
 
 
(5,254,149
) 
 
 
(5,385,865
) 
Effect of adoption of IFRS 9
  
 
544,628
 
 
 
—  
 
 
 
—  
 
Effect of adoption of IFRS 15
  
 
(8,725,841
) 
 
 
—  
 
 
 
—  
 
 
  
 
 
 
 
 
 
 
 
 
 
 
Closing balance as of December 31,
  
 
Ps.  86,613,327
 
 
 
Ps.  88,074,856
 
 
 
Ps. 66,303,077
 
 
  
 
 
 
 
 
 
 
 
 
 
 
Presented in the consolidated statements of financial position as follows:
  
 
 
 
 
 
 
 
 
 
 
 
Deferred income tax assets
  
 
Ps.111,186,768
 
 
 
Ps.106,167,897
 
 
 
Ps.115,370,240
 
Deferred income tax liabilities
  
 
(24,573,441
) 
 
 
(18,093,041
) 
 
 
(49,067,163
) 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
 
Ps.  86,613,327
 
 
 
Ps.  88,074,856
 
 
 
Ps.  66,303,077
 
 
  
 
 
 
 
 
 
 
 
 
 
Available Tax Loss Carryforwards Recorded in Deferred Tax Assets
a) At December 31, 2020, the available tax loss carryforwards recorded in deferred tax assets are as follows on a country by country ba
s
is:
 
Country
  
Gross balance

of available tax loss

carryforwards at

December 31, 2020
 
  
Tax-effected

loss carryforward

benefit
 
Brazil
  
Ps.
44,578,152
 
  
Ps.
15,156,572
 
Mexico
  
 
20,523,070
 
  
 
6,156,920
 
Austria
  
 
11,631,381
 
  
 
2,907,845
 
United States
  
 
3,023,441
 
  
 
786,095
 
Peru
  
 
380,770
 
  
 
112,327
 
Puerto Rico
  
 
5,574
 
  
 
2,174
 
 
  
 
 
 
  
 
 
 
Total
  
Ps.
80,142,388
 
  
Ps.
25,121,933