Income Taxes - Summary of Changes in Balance of Tax Loss Carryforwards (Detail) - MXN ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Major components of tax expense (income) [abstract] | |||
| Balance at beginning of the period | $ 17,557 | $ 22,000 | $ 22,129 |
| Increase | 266 | 2,002 | 10,610 |
| Usage of tax losses | (5,939) | (5,685) | (10,706) |
| Effect of foreign currency exchange rates | (613) | (760) | (33) |
| Balance at end of the period | $ 11,271 | $ 17,557 | $ 22,000 |