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Right-of-use assets and lease debt - Summary of Long Term Debt Maturities (Detail)
$ in Thousands, $ in Millions
Dec. 31, 2021
MXN ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
MXN ($)
Disclosure of detailed information about borrowings [line items]      
Long-term debt $ 71,021,868 $ 3,450 $ 84,259,336
2023      
Disclosure of detailed information about borrowings [line items]      
Long-term debt 13,370,533    
2024      
Disclosure of detailed information about borrowings [line items]      
Long-term debt 22,664,124    
2025      
Disclosure of detailed information about borrowings [line items]      
Long-term debt 10,342,707    
2026 and Thereafter [member]      
Disclosure of detailed information about borrowings [line items]      
Long-term debt $ 24,644,504