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Income Taxes - Summary of Reconciliation of Deferred Tax Assets and Liabilities, Net (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
MXN ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2022
USD ($)
Reconciliation of changes in deferred tax liability (asset) [abstract]        
Deferred Tax (Liability) Asset Beginning Balance $ 77,822,839 $ 66,303,077 $ 88,074,856  
Deferred tax benefit 1,455,448 19,623,461 12,292,014  
Translation effect (1,644,500) (727,099) 375,105  
Deferred tax benefit recognized in OCI 10,985,695 (4,176,197) (26,472,481)  
Deferred taxes acquired in business combinations (11,571)   (2,580,552)  
Hyperinflationary effect in Argentina (942,751) (3,540,962) (5,385,865)  
Disposals (Note 2Ac) (3,856,459) (1,203,203)    
Effect On SpinOff 14,607,050      
Related discontinued operation   1,543,762    
Deferred tax (liability) asset ending balance 98,415,751 77,822,839 66,303,077  
Presented in the consolidated statements of financial position as follows:        
Deferred income tax assets 128,717,811 127,287,934 115,370,240 $ 6,630
Deferred income tax liabilities (30,302,060) (49,465,095) (49,067,163) $ (1,561)
Deferred tax assets and liabilities, net $ 98,415,751 $ 77,822,839 $ 66,303,077