Financial risk management - Sensitivity analysis for interest rates (Details) - Variable interest rate - MXN ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Financial risk management | |||
| Accrued interest | $ 4,160,000 | $ 3,340,000 | $ 3,340,000 |
| Hypothetical unfavorable change in interest rate (as a percent) | 10.00% | 10.00% | 10.00% |
| Hypothetical increase in financing expense through unfavorable change in debt variable interest rates | $ 30,571 | $ 38,660 | $ 37,180 |