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Shareholders Equity - Summary of Computation of Basic and Diluted Earnings per Share (Detail)
$ / shares in Units, $ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
MXN ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
MXN ($)
$ / shares
shares
Dec. 31, 2020
MXN ($)
$ / shares
shares
Earnings per share [abstract]        
Net profit for the period attributable to equity holders of the parent from continuing operations $ 82,878,406 $ 4,269 $ 68,187,225 [1] $ 35,264,826 [1]
Net profit for the period attributable to equity holders of the parent from discontinued operations (6,719,015) $ (346) 124,235,942 [1] 11,587,779 [1]
Net profit for the period attributable to equity holders of the parent | $ $ 76,159,391   $ 192,423,167 $ 46,852,605
Weighted average shares (in millions) | shares 63,936 63,936 65,967 66,265
Earnings per share attributable to equity holders of the parent continuing operations $ 1.3   $ 1.03 $ 0.53
Earnings per share attributable to equity holders of the parent discontinued operations $ (0.11)   $ 1.88 $ 0.17
[1] Restated for discontinued operations