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Intangible Assets, Net (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Analysis of the changes in intangible assets    
Balance at beginning of the period $ 37,734,771 $ 38,106,325
Balance at end of the period 35,886,434 37,734,771
Goodwill    
Analysis of the changes in intangible assets    
Balance at beginning of the period 14,112,626 14,112,626
Balance at end of the period 14,112,626 14,112,626
Trademarks | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 1,267,174 1,740,001
Amortization of the year 472,827 472,827
Balance at end of the period 794,347 1,267,174
Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 15,719,572 15,719,572
Transfers and reclassifications (553,505)  
Balance at end of the period 15,166,067 15,719,572
Concessions | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Amortization of the year 110,701  
Balance at end of the period 442,804  
Licenses | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 2,705,448 1,877,769
Balance at end of the period 2,797,708 2,705,448
List of subscribers | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 1,725,829 2,686,755
Balance at end of the period 799,153 1,725,829
Other intangible assets | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 1,427,850 1,186,644
Balance at end of the period 1,158,582 1,427,850
Intangible Assets with Indefinite Useful Lives | Goodwill    
Analysis of the changes in intangible assets    
Balance at beginning of the period 14,112,626 14,112,626
Balance at end of the period 14,112,626 14,112,626
Intangible Assets with Indefinite Useful Lives | Trademarks    
Analysis of the changes in intangible assets    
Balance at beginning of the period 776,272 782,958
Balance at end of the period 615,147 776,272
Intangible Assets with Indefinite Useful Lives | Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 15,719,572 15,719,572
Balance at end of the period 15,166,067 15,719,572
Cost    
Analysis of the changes in intangible assets    
Balance at beginning of the period 48,880,921 47,095,200
Additions 1,781,568 2,789,090
Retirements (603,485) (1,095,092)
Impairment adjustments (89,597) (6,851)
Effect of translation (15,520) 98,574
Balance at end of the period 49,953,887 48,880,921
Cost | Trademarks | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 1,891,306 1,891,306
Balance at end of the period 1,891,306 1,891,306
Cost | Concessions | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Transfers and reclassifications 553,505  
Balance at end of the period 553,505  
Cost | Licenses | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 6,504,450 5,366,912
Additions 1,222,802 2,112,768
Retirements (257,513) (1,026,954)
Transfers and reclassifications   (761)
Effect of translation 930 52,485
Balance at end of the period 7,470,669 6,504,450
Cost | List of subscribers | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 6,207,195 6,207,405
Effect of translation (3,320) (210)
Balance at end of the period 6,203,875 6,207,195
Cost | Other intangible assets | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period 3,669,500 3,014,421
Additions 558,766 676,322
Retirements (274,815) (68,138)
Transfers and reclassifications   761
Effect of translation (12,759) 46,134
Balance at end of the period 3,940,692 3,669,500
Cost | Intangible Assets with Indefinite Useful Lives | Goodwill    
Analysis of the changes in intangible assets    
Balance at beginning of the period 14,112,626 14,112,626
Balance at end of the period 14,112,626 14,112,626
Cost | Intangible Assets with Indefinite Useful Lives | Trademarks    
Analysis of the changes in intangible assets    
Balance at beginning of the period 776,272 782,958
Retirements (71,157)  
Impairment adjustments (89,597) (6,851)
Effect of translation (371) 165
Balance at end of the period 615,147 776,272
Cost | Intangible Assets with Indefinite Useful Lives | Concessions    
Analysis of the changes in intangible assets    
Balance at beginning of the period 15,719,572 15,719,572
Transfers and reclassifications (553,505)  
Balance at end of the period 15,166,067 15,719,572
Accumulated amortisation and impairment    
Analysis of the changes in intangible assets    
Balance at beginning of the period (11,146,150) (8,988,875)
Amortization of the year (2,664,240) (2,525,684)
Other amortization of the year (504,674) (352,654)
Retirements (239,462) (778,125)
Effect of translation 8,149 (57,062)
Balance at end of the period (14,067,453) (11,146,150)
Accumulated amortisation and impairment | Trademarks | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period (624,132) (151,305)
Amortization of the year (472,827) (472,827)
Balance at end of the period (1,096,959) (624,132)
Accumulated amortisation and impairment | Concessions | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Amortization of the year (110,701)  
Balance at end of the period (110,701)  
Accumulated amortisation and impairment | Licenses | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period (3,799,002) (3,489,143)
Amortization of the year (1,116,080) (979,238)
Retirements (236,111) (710,199)
Transfers and reclassifications 4,673  
Effect of translation 1,337 (40,820)
Balance at end of the period (4,672,961) (3,799,002)
Accumulated amortisation and impairment | List of subscribers | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period (4,481,366) (3,520,650)
Amortization of the year (926,676) (960,716)
Effect of translation 3,320  
Balance at end of the period (5,404,722) (4,481,366)
Accumulated amortisation and impairment | Other intangible assets | Intangible Assets with Finite Useful Lives    
Analysis of the changes in intangible assets    
Balance at beginning of the period (2,241,650) (1,827,777)
Amortization of the year (37,956) (112,903)
Other amortization of the year (504,674) (352,654)
Retirements (3,351) (67,926)
Transfers and reclassifications (4,673)  
Effect of translation 3,492 (16,242)
Balance at end of the period $ (2,782,110) $ (2,241,650)