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Financial Instruments - Summary of Maturity Analysis for Non-derivative and Derivative Financial Liabilities (Details) - Liquidity risk - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Percentage of outstanding consolidated total indebtedness at the level of its sub-holding companies 55.00% 55.00%
Notes and bonds $ 176,039  
Loans from Banks 9,994  
Derivative financial liabilities (9,471)  
Year two    
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Notes and bonds 4,306  
Loans from Banks 7,784  
Derivative financial liabilities (1,161)  
Year three    
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Notes and bonds 16,326  
Loans from Banks 662  
Derivative financial liabilities (1,397)  
Year four    
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Notes and bonds 11,498  
Loans from Banks 734  
Derivative financial liabilities (1,307)  
Year five    
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Notes and bonds 18,382  
Loans from Banks 546  
Derivative financial liabilities (726)  
Six years and not later than then years    
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Notes and bonds 7,627  
Loans from Banks 211  
Derivative financial liabilities (902)  
Six years and thereafter    
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [line items]    
Notes and bonds 117,900  
Loans from Banks 57  
Derivative financial liabilities $ (3,978)