Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Reconciliation for Impaired Accounts Receivable (Detail) - MXN ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Domestic customers | |||
| Trade and Other Receivables [Line Items] | |||
| Balance at the beginning of the year | $ (8,158,697) | $ (8,752,400) | $ (5,637,756) |
| Impairment of accounts receivable | (3,448,371) | 593,703 | (3,114,644) |
| Balance at the end of the year | (11,607,068) | (8,158,697) | (8,752,400) |
| Export customers | |||
| Trade and Other Receivables [Line Items] | |||
| Balance at the beginning of the year | (16,237,967) | (167,546) | (190,779) |
| (Increase) cancellation (1) | (9,504,395) | (16,032,261) | 1,320 |
| Translation effects | 20,783 | (38,160) | 21,913 |
| Balance at the end of the year | $ (25,721,579) | $ (16,237,967) | $ (167,546) |