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Income Taxes - Summary of Temporary Differences Giving Rise to Deferred Income Tax Liabilities (Assets) (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position $ (4,450) $ (5,136) $ (5,632) $ (8,669)
Deferred income tax related to consolidated statement of income 1,177 889 2,350  
Deferred tax, asset (7,771) (7,975)    
Deferred tax liabilities 3,321 2,839    
Expected credit losses        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (64) (95)    
Deferred income tax related to consolidated statement of income 15 (15) (34)  
Inventories        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position 53 36    
Deferred income tax related to consolidated statement of income 5 18 (1)  
Prepaid expenses        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position 20 24    
Deferred income tax related to consolidated statement of income (4) (32) 29  
Property, plant and equipment, net        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (1,150) (1,305)    
Deferred income tax related to consolidated statement of income 314 (118) (223)  
Other assets        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (190) (257)    
Deferred income tax related to consolidated statement of income 45 86 (28)  
Finite useful lived intangible assets        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (10) 1    
Deferred income tax related to consolidated statement of income 1 48 69  
Indefinite lived intangible assets        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position 1,509 1,311    
Deferred income tax related to consolidated statement of income 591 123 165  
Post-employment and other non-current employee benefits        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (438) (444)    
Deferred income tax related to consolidated statement of income (2) 15 (59)  
Derivative financial instruments        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position 75 2    
Deferred income tax related to consolidated statement of income 73 (3) (72)  
Contingencies        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (921) (895)    
Deferred income tax related to consolidated statement of income (96) (23) 171  
Employee profit sharing payable        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (533) (359)    
Deferred income tax related to consolidated statement of income 174 (85) (236)  
Tax loss carryforwards        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (5,726) (7,205)    
Deferred income tax related to consolidated statement of income 1,221 29 (445)  
Tax credits to recover        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (726) (1,067)    
Deferred income tax related to consolidated statement of income 342 327 1,200  
Cumulative other comprehensive income        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (394) (218)    
Deferred income tax related to consolidated statement of income (211) (417) 760  
Liabilities of amortization of goodwill of business acquisition        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position 5,574 6,117    
Deferred income tax related to consolidated statement of income (543) 0 87  
Leases Liabilities, net        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (43) (14)    
Deferred income tax related to consolidated statement of income (28) (37) (15)  
Other        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Deferred income tax related to consolidated statement of financial position (1,486) (768)    
Deferred income tax related to consolidated statement of income $ (720) $ 973 $ 982