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Income Taxes - Additional Information (Detail) $ in Millions, $ in Millions |  |  |  |  |  |  | 3 Months Ended | 4 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2019 MXN ($) | Nov. 18, 2019 | Dec. 31, 2018 MXN ($) | Aug. 31, 2018 | Jan. 01, 2017 | Dec. 31, 2019 MXN ($) | Sep. 30, 2019 | Dec. 31, 2018 MXN ($) | Jun. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2019 USD ($) per-liter | Dec. 31, 2019 MXN ($) per-liter | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 | Dec. 31, 2015
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective tax rate |  |  |  |  |  |  |  |  |  |  |  | 30.68% | 30.68% | 30.60% | (37.17%) |  |
Unrecognized deferred tax liabilities | $ |  | $ 13,187 |  | $ 9,237 |  |  | $ 13,187 |  | $ 9,237 |  |  |  | $ 13,187 | $ 9,237 | $ 5,847 |  |
NOLs usage limit |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% | 30.00% | 30.00% |  |
Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend tax on distributions |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |  |
Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend tax on distributions |  |  |  |  |  |  |  |  |  |  |  | 7.50% | 7.50% |  |  |  |
Excluding Venezuela's Deconsolidation and Philippine's Consolidation Impact [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28.12% |  |
Argentina [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00% |  |
Sales taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.75% |  |
Argentina [member] | Two thousand eighteen and nineteen [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |
Percentage of dividend received from residents withholding |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.00% |  |
Argentina [member] | Two thousand nineteen onwards [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |
Percentage of dividend received nonresidents withholding |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.00% |  |
Argentina [member] | Two thousand and eighteen [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% |  |
Argentina [member] | Two Thousand and Nineteen [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% |  |
Argentina [member] | Two thousand and twenty [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |
Argentina [member] | Two Thousand and Twenty One [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |
Argentina [member] | Two thousand and twenty two [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |
Argentina [member] | Two Thousand Twenty Onwards [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate income tax |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% |  |  |  |
Dividend withholding tax rate |  |  |  |  |  |  |  |  |  |  |  | 7.00% | 7.00% |  |  |  |
Inflation adjustment rate |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |  |  |  |
Tax rate on taxable purchases |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% |  |  |  |
Brazil [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recoverable taxes | $ |  | $ 4,223 |  | $ 2,361 |  |  | $ 4,223 |  | $ 2,361 |  |  |  | $ 4,223 | $ 2,361 |  |  |
Average federal production and federal sales tax |  |  |  |  |  |  |  |  |  |  |  | 16.30% | 16.30% |  |  |  |
Excise tax rate |  |  |  |  | 20.00% |  |  |  | 4.00% |  |  |  |  |  |  |  |
Colombia [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reform income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00% |
Percentage of reform income tax rate |  |  |  |  |  | 34.00% |  |  |  |  |  |  |  |  |  |  |
Percentage of reform extra income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% | 6.00% |  |
Percentage of special increase in income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% | 15.00% |
Income tax rate |  |  |  | 33.00% |  |  |  |  |  |  |  |  |  | 9.00% | 8.00% | 6.00% | 5.00%
Dividend tax on distributions |  | 7.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum assumed income tax rate |  |  |  |  |  |  |  |  |  |  |  | 1.50% | 1.50% |  |  |  |
Dividend tax on resident individuals |  |  |  |  |  |  |  |  |  |  |  | 15.00% | 15.00% |  |  |  |
Dividends tax rate applicable to foreign nonresidents |  |  |  |  |  |  |  |  |  |  |  | 7.50% | 7.50% |  |  |  |
Percent of municipality sales tax as a credit |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |  |  |  |
Colombia [member] | Two Thousand and Nineteen [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of increase in income tax rate |  |  |  | 3.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Municipality sales tax |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Colombia [member] | Two thousand and twenty [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  | 32.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of increase in income tax rate |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Municipality sales tax |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Colombia [member] | Two Thousand and Twenty One [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  | 31.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of increase in income tax rate |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Colombia [member] | Two thousand and twenty two [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Colombia [member] | Later than one year [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reform income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% |  |
Colombia [member] | Two Thousand Twenty Onwards [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum assumed income tax rate |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 0.50% |  |  |  |
Dividend tax on resident individuals |  |  |  |  |  |  |  |  |  |  |  | 10.00% | 10.00% |  |  |  |
Dividends tax rate applicable to foreign nonresidents |  |  |  |  |  |  |  |  |  |  |  | 10.00% | 10.00% |  |  |  |
Colombia [member] | In Two Thousand Twenty One Onwards [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum assumed income tax rate |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |
Costa Rica [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Value-added tax |  |  |  | 13.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest expenses |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Costa Rica [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Costa Rica [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Mexico [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% | 30.00% | 30.00% |  |
Mexico [member] | Two Thousand Twenty Onwards [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excise tax rate |  |  |  |  |  |  |  |  |  |  |  | 25.00% | 25.00% |  |  |  |
Net Interest Deduction Adjusted Taxable Income Rate |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% |  |  |  |
Exception for deductible interest |  |  |  |  |  |  |  |  |  |  |  | $ 1 | $ 20,000,000 |  |  |  |
Non-deductible interests limitation period |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |
Mexico [member] | Two Thousand Twenty Onwards [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excise tax per liter on the production | per-liter |  |  |  |  |  |  |  |  |  |  |  | 1.17 | 1.17 |  |  |  |
Mexico [member] | Two Thousand Twenty Onwards [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excise tax per liter on the production | per-liter |  |  |  |  |  |  |  |  |  |  |  | 1.2616 | 1.2616 |  |  |  |
Panama [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excise tax rate |  |  | 5.00% |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |  |
Panama [member] | Two Thousand Twenty Onwards [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excise tax rate |  |  |  |  |  |  |  |  |  |  |  | 7.00% | 7.00% |  |  |  |
Changes in tax rates or tax laws enacted or announced [member] | Brazil [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major Components Of Tax Expense Income [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excise tax rate | 4.00% |  |  |  |  |  | 10.00% | 8.00% |  | 12.00% |  |  |  | 4.00% |  |  |

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