v3.25.1
Post-Employment and Other Non-current Employee Benefits - Summary of Amounts Recognized in Consolidated Income Statements and Consolidated Statement of Changes in Equity (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]        
Remeasurements of the Net Defined Benefit Liability net of taxes $ 1,654 $ 747 $ 912 $ 1,240
Pension and Retirement Plans        
Disclosure of defined benefit plans [line items]        
Remeasurements of the Net Defined Benefit Liability net of taxes 3,655 2,725    
Net benefit cost recognized in the consolidated statements of income        
Disclosure of defined benefit plans [line items]        
Current Service Cost 331 320 340  
Past Service Cost 132 163 53  
(Gain) or Loss on Settlement or curtailment (115) (133) (94)  
Net Interest on the Net Defined Benefit Liability 305 297 286  
Net benefit cost recognized in the consolidated statements of income | Pension and Retirement Plans        
Disclosure of defined benefit plans [line items]        
Current Service Cost 235 233 246  
Past Service Cost 93 155 47  
(Gain) or Loss on Settlement or curtailment (107) (126) (85)  
Net Interest on the Net Defined Benefit Liability 224 222 141  
Net benefit cost recognized in the consolidated statements of income | Seniority premiums        
Disclosure of defined benefit plans [line items]        
Current Service Cost 96 87 94  
Past Service Cost 39 8 6  
(Gain) or Loss on Settlement or curtailment (8) (7) (9)  
Net Interest on the Net Defined Benefit Liability 81 75 145  
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income        
Disclosure of defined benefit plans [line items]        
Remeasurements of the Net Defined Benefit Liability net of taxes 1,654 747 912  
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Pension and Retirement Plans        
Disclosure of defined benefit plans [line items]        
Remeasurements of the Net Defined Benefit Liability net of taxes 1,299 625 804  
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Seniority premiums        
Disclosure of defined benefit plans [line items]        
Remeasurements of the Net Defined Benefit Liability net of taxes $ 355 $ 122 $ 108