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Income Taxes - Summary of Major Components of Income Tax Expense (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) | [1] | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($)
Current tax expense: |  |  |  |  |
Current year |  | $ 6,011 |  | $ 4,763 | $ 6,108
Deferred tax expense: |  |  |  |  |
Origination and reversal of temporary differences |  | 905 |  | 1,579 | (1,859)
(Benefit) utilization of tax losses recognized |  | (1,268) |  | (1,082) | (65)
Total deferred tax (benefit) |  | (363) |  | 497 | (1,924)
Total income tax expense in consolidated net income | $ 299 | 5,648 | [2] | 5,260 | 4,184
Mexico [member] |  |  |  |  |
Current tax expense: |  |  |  |  |
Current year |  | 5,123 |  | 3,545 | 3,874
Deferred tax expense: |  |  |  |  |
Origination and reversal of temporary differences |  | (438) |  | (283) | (1,798)
(Benefit) utilization of tax losses recognized |  | (1,136) |  | (679) | 179
Total deferred tax (benefit) |  | (1,574) |  | (962) | (1,619)
Total income tax expense in consolidated net income |  | 3,549 |  | 2,583 | 2,255
Foreign [member] |  |  |  |  |
Current tax expense: |  |  |  |  |
Current year |  | 888 |  | 1,218 | 2,234
Deferred tax expense: |  |  |  |  |
Origination and reversal of temporary differences |  | 1,343 |  | 1,862 | (61)
(Benefit) utilization of tax losses recognized |  | (132) |  | (403) | (244)
Total deferred tax (benefit) |  | 1,211 |  | 1,459 | (305)
Total income tax expense in consolidated net income |  | $ 2,099 |  | $ 2,677 | $ 1,929
[1] | Convenience translation to U.S. dollars ($) – See Note 2.2.3
[2] | The Company initially adopted IFRS 16 on January 1, 2019 using the modified retrospective approach under which the comparative information is not restated. – See Note 2.4.1

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