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Components of other comprehensive income (loss) - Summary of Movement on Components of Other Comprehensive Loss (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2023
MXN ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
MXN ($)
Dec. 31, 2021
MXN ($)
Controlling interest:        
Unrealized gain (loss) on equity investments at fair value, net of deferred taxes $ (967,609) $ (57) $ (4,707,276) $ 4,560,869
Translation effect by discontinued operations     5,193,281 (829,163)
Asset's revaluation surplus net of deferred taxes 868,456      
Total equity attributable to equity holders of the parent [member]        
Controlling interest:        
Unrealized gain (loss) on equity investments at fair value, net of deferred taxes (967,609)   (4,707,276) 4,560,869
Translation effect of foreign entities (37,399,680)   (31,086,965) (4,837,206)
Translation effect by discontinued operations 0   5,193,281 (829,163)
Remeasurement of defined benefit plan, net of deferred taxes (3,662,102)   (4,599,407) 11,100,835
Asset's revaluation surplus net of deferred taxes 497,628      
Non-controlling interest of the items above (3,885,410)   (3,734,066) (2,135,886)
Other comprehensive income (loss) $ (45,417,173)   $ (38,934,433) $ 7,859,449