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Commitments and Contingencies - Additional Information (Detail)
R$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
MXN ($)
Dec. 31, 2021
BRL (R$)
Dec. 31, 2018
MXN ($)
Dec. 31, 2021
BRL (R$)
Disclosure of commitments and contingencies [line items]        
Fine imposed on sanction procedure initiated by triggered breach     $ 2,543,937  
Monetary correction in a total amount of regulatory matters $ 24,620,529 R$ 6,675,000    
Value Added Tax [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 46,016,079     R$ 12,475,659
Provision for taxes [member] | Value Added Tax [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 3,297,735     894,066
Provision for taxes [member] | Social Contribution [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 3,228,656     875,338
Provision for taxes [member] | Social Integration Program [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 5,116,747     1,387,228
Provision for taxes [member] | Allegedly Improper Exclusion [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 1,396,376     378,579
Provision for taxes [member] | Contribute To The Promotion Of Public Radio Broadcasting [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 3,762,522     1,020,077
Provision for taxes [member] | Telecommunications Technology Development Fund [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 387     105
Provision for taxes [member] | Services Tax [Member]        
Disclosure of commitments and contingencies [line items]        
Provision 48,964     13,275
Provision for taxes [member] | IRRF And Cide Taxes And Remittances To Foreign Operators [Member]        
Disclosure of commitments and contingencies [line items]        
Provision $ 120,856     32,766
Agencia Nacional de telecomunicacoes [member]        
Disclosure of commitments and contingencies [line items]        
Inflation-related adjustments applicable to percentage of concessions price 60.00% 60.00%    
Related matters [member] | Provision for taxes [member]        
Disclosure of commitments and contingencies [line items]        
Provision $ 17,915,605     4,857,193
Tax contingent liability [member] | Social Contribution [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 18,360,489     4,977,808
Tax contingent liability [member] | Social Integration Program [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 16,245,325     4,404,355
Tax contingent liability [member] | Allegedly Improper Exclusion [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 11,684,785     3,167,923
Tax contingent liability [member] | Contribute To The Promotion Of Public Radio Broadcasting [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 4,213,972     1,142,472
Tax contingent liability [member] | Telecommunications Technology Development Fund [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 4,778,186     1,295,439
Tax contingent liability [member] | Services Tax [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 1,847,959     501,010
Tax contingent liability [member] | IRRF And Cide Taxes And Remittances To Foreign Operators [Member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 4,143,670     1,123,412
Tax contingent liability [member] | Related matters [member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 131,140,527     35,554,192
Contingent liabilities [member] | TFI [member]        
Disclosure of commitments and contingencies [line items]        
Tax contingencies amount 18,118,080     4,912,087
Provision for Monetary correction in a total amount of regulatory matters [member]        
Disclosure of commitments and contingencies [line items]        
Provision $ 4,577,389     R$ 1,241,000