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Income Taxes - Summary of Major Components of Income Tax Expense (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Current tax expense (income) and adjustments for current tax of prior periods [abstract]      
Current year $ 7,604 $ 5,658 $ 4,259
Deferred tax expense (income) [abstract]      
Origination and reversal of temporary differences (44) 860 2,795
(Benefit) utilization of tax losses recognized 1,221 29 (445)
Total deferred tax income expense 1,177 889 2,350
Total income tax expense in consolidated net income 8,781 6,547 6,609
Mexico      
Current tax expense (income) and adjustments for current tax of prior periods [abstract]      
Current year 5,474 3,522 3,356
Deferred tax expense (income) [abstract]      
Origination and reversal of temporary differences (322) 197 1,659
(Benefit) utilization of tax losses recognized 238 (4) 356
Total deferred tax income expense (84) 193 2,015
Total income tax expense in consolidated net income 5,390 3,715 5,371
Foreign      
Current tax expense (income) and adjustments for current tax of prior periods [abstract]      
Current year 2,130 2,136 903
Deferred tax expense (income) [abstract]      
Origination and reversal of temporary differences 278 663 1,136
(Benefit) utilization of tax losses recognized 983 33 (801)
Total deferred tax income expense 1,261 696 335
Total income tax expense in consolidated net income $ 3,391 $ 2,832 $ 1,238