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Commitments and Contingencies - Schedule of Purchase Commitments (Detail) - Wireless carriers [member] - Purchase commitment for purchase of airtime minutes at current market prices [member]
$ in Thousands
Dec. 31, 2020
MXN ($)
Disclosure of commitments [line items]  
Purchase commitments $ 127,588,218
2021 [member]  
Disclosure of commitments [line items]  
Purchase commitments 74,446,526
2022 [member]  
Disclosure of commitments [line items]  
Purchase commitments 37,345,449
2023 [member]  
Disclosure of commitments [line items]  
Purchase commitments 2,240,297
2024 and thereafter [member]  
Disclosure of commitments [line items]  
Purchase commitments $ 13,555,946