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Equity - Additional Information (Detail) $ / shares in Units, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2019 shares | Dec. 31, 2021 MXN ($) $ / shares shares | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2022 MXN ($)
Disclosure of classes of share capital [line items] |  |  |  |  |
Fixed capital stock (nominal value) per share | $ / shares |  | $ 0 |  |  |
Percentage of income to be transferred to reserve |  | 5.00% |  |  |
Minimum percentage of capital stock at nominal value to be transferred to reserve |  | 20.00% |  |  |
Amount in legal reserve | $ |  | $ 412 | $ 412 | $ 187 |
Balance in legal reserve fund | $ |  | $ 14,027 |  |  |
Issued capital, ordinary shares | $ |  |  |  |  | $ 934
Major Ordinary Share Transactions After Stock Split |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Outstanding shares (in shares) | shares |  | 16,806,658,096 |  |  |
Reverse Stock Split |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Stock split conversion ratio | 0.125 |  |  |  |
A |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Equity threshold percentage |  | 50.10% |  |  |
D |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Equity threshold percentage |  | 49.90% |  |  |
Series B shares, without par value |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Outstanding shares (in shares) | shares | 3 |  |  |  |
Series L shares, without par value |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Outstanding shares (in shares) | shares | 5 |  |  |  |

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