Financial risk management - Financial instruments at fair value (Details) - MXN ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Financial Instruments at fair value | |||
| Total long-term debt | $ 13,450,000 | $ 10,700,000 | $ 10,700,000 |
| Book Value | |||
| Financial Instruments at fair value | |||
| Total long-term debt | 13,450,000 | 10,700,000 | 10,700,000 |
| Fair Value | |||
| Financial Instruments at fair value | |||
| Total long-term debt | 13,507,634 | 10,294,490 | 10,405,840 |
| Level 1 | Fair Value | |||
| Financial Instruments at fair value | |||
| Total long-term debt | $ 13,507,634 | $ 10,294,490 | $ 10,405,840 |