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Employee Benefits - Analysis of Net Liability and Net Period Cost for Employee Benefit (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities $ 137,923,317 $ 142,850,465  
Net period cost (benefit)      
Net period cost (benefit) 15,979,152 18,688,374 $ 18,085,954
Mexico [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 112,031,055 110,225,654  
Net period cost (benefit)      
Net period cost (benefit) 13,673,155 15,507,652 14,911,208
Puerto Rico [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 8,859,265 12,502,377  
Net period cost (benefit)      
Net period cost (benefit) 538,681 548,550 664,046
Brazil [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 6,303,584 6,108,744  
Net period cost (benefit)      
Net period cost (benefit) 587,552 724,587 722,412
Europe [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 9,971,256 13,127,228  
Net period cost (benefit)      
Net period cost (benefit) 1,176,028 1,753,872 1,701,424
Ecuador [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 519,239 601,239  
Net period cost (benefit)      
Net period cost (benefit) (29,743) 111,353 67,402
El Salvador [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 135,299 177,922  
Net period cost (benefit)      
Net period cost (benefit) 14,384 19,081 15,751
Nicaragua [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 62,327 75,084  
Net period cost (benefit)      
Net period cost (benefit) 11,502 18,561 3,711
Honduras [member]      
Disclosure of net defined benefit liability (asset) [line items]      
Liabilities 41,292 32,217  
Net period cost (benefit)      
Net period cost (benefit) $ 7,593 $ 4,718 $ 0