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Income Taxes - Summary of Major Components of Income Tax Expense (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Current tax expense (income) and adjustments for current tax of prior periods [abstract] |  |  |
Current year | $ 9,569 | $ 7,604 | $ 5,658
Deferred tax expense (income) [abstract] |  |  |
Origination and reversal of temporary differences | 394 | (44) | 860
Utilization (benefit) of tax losses recognized | 1,805 | 1,221 | 29
Total deferred tax income expense | 2,199 | 1,177 | 889
Total income tax expense in consolidated net income | 11,768 | 8,781 | 6,547
Mexico |  |  |
Current tax expense (income) and adjustments for current tax of prior periods [abstract] |  |  |
Current year | 6,918 | 5,474 | 3,522
Deferred tax expense (income) [abstract] |  |  |
Origination and reversal of temporary differences | (1) | (322) | 197
Utilization (benefit) of tax losses recognized | 1,019 | 238 | (4)
Total deferred tax income expense | 1,018 | (84) | 193
Total income tax expense in consolidated net income | 7,936 | 5,390 | 3,715
Foreign |  |  |
Current tax expense (income) and adjustments for current tax of prior periods [abstract] |  |  |
Current year | 2,651 | 2,130 | 2,136
Deferred tax expense (income) [abstract] |  |  |
Origination and reversal of temporary differences | 395 | 278 | 663
Utilization (benefit) of tax losses recognized | 786 | 983 | 33
Total deferred tax income expense | 1,181 | 1,261 | 696
Total income tax expense in consolidated net income | $ 3,832 | $ 3,391 | $ 2,832

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