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Intangible Assets, Net and Goodwill - Additional Information (Detail)
$ in Thousands, $ in Thousands, € in Millions
 1 Months Ended 12 Months Ended
Nov. 30, 2021
MXN ($)
Feb. 28, 2021
MXN ($)
Feb. 29, 2020
MXN ($)
Band
Feb. 29, 2020
USD ($)
Band
Jan. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2019
COP ($)
Jan. 31, 2019
MXN ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2020
EUR (€)
Dec. 31, 2019
MXN ($)
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                 $ 1,752,128      
Acquisitions 2019 [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amortization of intangible assets                       $ 20,209,434
Acquisitions 2020 [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amortization of intangible assets                   $ 20,338,080    
Acquisitions 2021 [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amortization of intangible assets                 19,168,800      
IFETEL [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                       $ 459,668
Estimated useful life of intangible assets                       20 years
Submarine Cable [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Estimated useful life of intangible assets                       10 years
FiveG Licence [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                 $ 2,008,503      
Licence Expiration Year                 2041 years      
Renewal of license [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                 $ 3,457,251      
Other licenses [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                 706,900      
Twenty Twenty Business Acquisition [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Number of brands | Band     2,500 2,500                
Claro Brazil [Member] | FiveG Licence [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license $ 17,789,163                      
30 Mhz spectrum [member] | Twenty Twenty Business Acquisition [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license     $ 9,246,825 $ 30                
Estimated useful life of intangible assets     20 years 20 years                
400 MHZ [Member] | Renewal of license [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license               $ 1,649,525        
400 MHZ [Member] | Twenty Twenty Business Acquisition [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                   1,806,875    
Comcel [Member] | Renewal of license [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license           $ 2,753,768 $ (468,511,573,375)          
Estimated useful life of intangible assets           20 years 20 years          
Puerto Rico Argentina Guatemala Panam And Others Countries [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                       $ 1,862,934
Puerto Rico Argentina Guatemala Panam And Others Countries [Member] | Twenty Twenty Business Acquisition [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                   1,701,682    
CTE [Member] | Twenty Twenty Business Acquisition [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license         $ 620,052              
Number Of Pair of Frequencies         12 months              
Austria [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                   3,023,732    
Austria [member] | 3.5 GHz [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license | €                     € 64.3  
Belarus [member] | 2.1 GHz [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license | €                     9.5  
Croatia [member] | 2.1 GHz [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license | €                     € 7.2  
Slovenia [member] | Twenty Twenty Business Acquisition [Member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                   $ 1,704,280    
El Salvador [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license   $ 139,363                    
Estimated useful life of intangible assets   20 years                    
Colombia [member] | Renewal of license [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license                 $ 1,599,473      
Colombia [member] | Top of range [member] | Renewal of license [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Licence Expiration Year                 3 years      
Colombia [member] | Bottom of range [member] | Renewal of license [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Licence Expiration Year                 2 years      
Chile [member]                        
Disclosure of intangible assets and goodwill [line items]                        
Amount paid for license   $ 411,375                    
Estimated useful life of intangible assets   10 years