v3.26.1
Employee Benefits - Amounts Recognized in the Income Statement and the Statement of Comprehensive Income (Details)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
 [1]
Dec. 31, 2025
MXN ($)
Dec. 31, 2024
MXN ($)
Dec. 31, 2023
MXN ($)
Disclosure of net defined benefit liability (asset) [line items]        
Current Service Cost   $ 1,067 $ 1,052 $ 910
Remeasurements of the Net Defined Benefit Liability $ (81) (1,457) (1,016) 160
Net benefit cost recognized in the consolidated statements of income        
Disclosure of net defined benefit liability (asset) [line items]        
Current Service Cost   1,113 929 866
Past Service Cost   61 429 322
(Gain) or Loss on Settlement or Curtailment   107 306 278
Net Interest on the Net Defined Benefit Liability   735 587 590
Net benefit cost recognized in the consolidated statements of income | Pension and Retirement Plans        
Disclosure of net defined benefit liability (asset) [line items]        
Current Service Cost   585 505 489
Past Service Cost   76 304 288
(Gain) or Loss on Settlement or Curtailment   90 254 243
Net Interest on the Net Defined Benefit Liability   407 339 367
Net benefit cost recognized in the consolidated statements of income | Seniority Premiums        
Disclosure of net defined benefit liability (asset) [line items]        
Current Service Cost   494 394 345
Past Service Cost   (13) 89 21
(Gain) or Loss on Settlement or Curtailment   9 27 21
Net Interest on the Net Defined Benefit Liability   278 200 178
Net benefit cost recognized in the consolidated statements of income | Post Retirement Medical Services        
Disclosure of net defined benefit liability (asset) [line items]        
Current Service Cost   34 30 32
Past Service Cost   (2) 36 13
(Gain) or Loss on Settlement or Curtailment   8 25 14
Net Interest on the Net Defined Benefit Liability   50 48 45
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurements of the Net Defined Benefit Liability   4,319 2,404 1,399
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Pension and Retirement Plans        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurements of the Net Defined Benefit Liability   3,369 2,019 1,311
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Seniority Premiums        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurements of the Net Defined Benefit Liability   799 441 117
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Post Retirement Medical Services        
Disclosure of net defined benefit liability (asset) [line items]        
Remeasurements of the Net Defined Benefit Liability   $ 151 $ (56) $ (29)
[1] Convenience translation to U.S. dollars ($) – See Note 2.2.4