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Intangible Assets and Goodwill, Net - Changes in intangible assets with definite useful lives (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Analysis of the changes in intangible assets    
Balance at beginning of the period $ 42,724,218  
Balance at end of the period 42,255,881 $ 42,724,218
Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 15,166,067 15,166,067
Balance at end of the period 15,166,067 15,166,067
Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 13,409,283  
Balance at end of the period 13,017,915 13,409,283
Intangible Assets with Finite Useful Lives | Trademarks with finite useful lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 255,782  
Balance at end of the period 183,654 255,782
Intangible Assets with Finite Useful Lives | Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 110,701  
Amortization of the year 110,701 110,701
Balance at end of the period   110,701
Intangible Assets with Finite Useful Lives | Licenses and software    
Analysis of the changes in intangible assets    
Balance at beginning of the period 4,692,574  
Balance at end of the period 5,158,928 4,692,574
Intangible Assets with Finite Useful Lives | List of subscribers    
Analysis of the changes in intangible assets    
Balance at beginning of the period 1,546,264  
Balance at end of the period 1,232,283 1,546,264
Intangible Assets with Finite Useful Lives | Payments for renewal of concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 5,825,559  
Balance at end of the period 5,825,559 5,825,559
Intangible Assets with Finite Useful Lives | Other intangible assets    
Analysis of the changes in intangible assets    
Balance at beginning of the period 978,403  
Balance at end of the period 617,491 978,403
Cost    
Analysis of the changes in intangible assets    
Balance at beginning of the period 65,034,704  
Balance at end of the period 66,929,587 65,034,704
Cost | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 35,719,769 33,343,230
Additions 1,899,464 1,235,177
Transfers from (to) property, plant and equipment 547,940 1,045,065
Retirements and impairment adjustments (643,888) (53,140)
Transfers and reclassifications 156,994 127,526
Effect of translation 11,342 21,911
Balance at end of the period 37,691,621 35,719,769
Cost | Intangible Assets with Finite Useful Lives | Trademarks with finite useful lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 2,227,096 2,127,697
Transfers and reclassifications   99,399
Balance at end of the period 2,227,096 2,227,096
Cost | Intangible Assets with Finite Useful Lives | Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 553,505 553,505
Balance at end of the period 553,505 553,505
Cost | Intangible Assets with Finite Useful Lives | Licenses and software    
Analysis of the changes in intangible assets    
Balance at beginning of the period 13,139,480 10,858,388
Additions 1,599,671 959,813
Transfers from (to) property, plant and equipment 609,974 1,247,347
Retirements and impairment adjustments (643,888) (28,127)
Transfers and reclassifications 117,716 84,823
Effect of translation 8,921 17,236
Balance at end of the period 14,831,874 13,139,480
Cost | Intangible Assets with Finite Useful Lives | List of subscribers    
Analysis of the changes in intangible assets    
Balance at beginning of the period 8,804,334 8,782,852
Transfers and reclassifications   16,428
Effect of translation 2,617 5,054
Balance at end of the period 8,806,951 8,804,334
Cost | Intangible Assets with Finite Useful Lives | Payments for renewal of concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 5,825,559 5,821,828
Additions   3,731
Balance at end of the period 5,825,559 5,825,559
Cost | Intangible Assets with Finite Useful Lives | Other intangible assets    
Analysis of the changes in intangible assets    
Balance at beginning of the period 5,169,795 5,198,960
Additions 299,793 271,633
Transfers from (to) property, plant and equipment (62,034) (202,282)
Retirements and impairment adjustments   (25,013)
Transfers and reclassifications 39,278 (73,124)
Effect of translation (196) (379)
Balance at end of the period 5,446,636 5,169,795
Accumulated Amortisation    
Analysis of the changes in intangible assets    
Balance at beginning of the period (22,310,486)  
Balance at end of the period (24,673,706) (22,310,486)
Accumulated Amortisation | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period (22,310,486) (19,469,413)
Amortization of the year (2,539,771) (2,474,510)
Other amortization of the year (329,144) 380,863
Retirements and impairment adjustments 516,045 30,130
Effect of translation (10,350) (15,830)
Balance at end of the period (24,673,706) (22,310,486)
Accumulated Amortisation | Intangible Assets with Finite Useful Lives | Trademarks with finite useful lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period (1,971,314) (1,899,187)
Amortization of the year (72,128) (72,127)
Balance at end of the period (2,043,442) (1,971,314)
Accumulated Amortisation | Intangible Assets with Finite Useful Lives | Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period (442,804) (332,103)
Amortization of the year (110,701) (110,701)
Balance at end of the period (553,505) (442,804)
Accumulated Amortisation | Intangible Assets with Finite Useful Lives | Licenses and software    
Analysis of the changes in intangible assets    
Balance at beginning of the period (8,446,906) (6,843,169)
Amortization of the year (1,741,517) (1,717,282)
Retirements and impairment adjustments 516,045 28,127
Reclassifications   96,304
Effect of translation (568) (10,886)
Balance at end of the period (9,672,946) (8,446,906)
Accumulated Amortisation | Intangible Assets with Finite Useful Lives | List of subscribers    
Analysis of the changes in intangible assets    
Balance at beginning of the period (7,258,070) (6,632,419)
Amortization of the year (313,981) (523,878)
Reclassifications   (96,719)
Effect of translation (2,617) (5,054)
Balance at end of the period (7,574,668) (7,258,070)
Accumulated Amortisation | Intangible Assets with Finite Useful Lives | Other intangible assets    
Analysis of the changes in intangible assets    
Balance at beginning of the period (4,191,392) (3,762,535)
Amortization of the year (301,444) (50,522)
Other amortization of the year (329,144) 380,863
Retirements and impairment adjustments   2,003
Reclassifications   415
Effect of translation (7,165) 110
Balance at end of the period $ (4,829,145) $ (4,191,392)