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Income Taxes - Additional Information (Detail) - MXN ($) |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Jul. 01, 2019 | Jun. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Sep. 01, 2018 | Oct. 19, 2017 | Jan. 01, 2017 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  | 8.00% |  |  |  |  |  | 30.00% | 30.00% | 30.00% |
NOLs usage limit |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  |
Withholding taxes associated with payment of dividends |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 |
Temporary differences associated with investments |  |  |  |  | $ 45,305,000,000 |  |  |  |  |  |  |  | $ 45,305,000,000 | $ 41,915,000,000 | $ 41,204,000,000 |
Coca Cola FEMSA [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of average federal production and federal sales tax |  |  |  |  |  |  |  |  |  |  |  |  | 16.50% |  |  |
Mato Grosso do Sul [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value-added tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17.00% |
Mato Grosso do Sul [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value-added tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |
Rio Grande do Sul [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value-added tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.00% |
Rio Grande do Sul [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value-added tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |
Minas Gerais [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining percentage of value added tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.00% |
Additional Contribution to poverty eradication |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |
Rio de Janeiro [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of contribution to poverty eradication |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |
Rio de Janeiro [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of contribution to poverty eradication |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |
Parana [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of contribution to poverty eradication |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16.00% |
Percentage of contribution to poverty eradication charged on sales to non-taxpayers |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |
Argentina [member] | 1-4 months [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reduction in excise tax |  |  |  |  | 4.00% | 20.00% |  |  |  |  |  |  |  |  |  |
Colombia [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% |  |  |
Minimum assumed income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 3.50% |  |  |
Capitalization ratio |  |  |  |  | 33.33% |  |  |  |  |  |  |  | 33.33% |  |  |
New tax on dividends paid to non-resident stockholders and resident individuals |  |  |  |  | 7.50% |  |  |  |  |  |  |  | 7.50% | 5.00% |  |
Value-added tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16.00% |
Income tax rate |  |  |  |  |  |  |  | 9.00% |  |  |  |  | 9.00% | 8.00% | 6.00% | 5.00%
Percentage of reform extra income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% | 6.00% |  |
Percentage of dividend received from Columbian residents withholding |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Percentage of dividend received from colombian non residents withholding |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |
Percentage of increase in income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.50% | 3.00% |
Percentage of Increase in value-added tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 19.00% |  |
Colombia [member] | Less than 1 year [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 32.00% |  |  |
Colombia [member] | Later than one year [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  | 33.00% |  |  |  |  | 31.00% |  |  |
Colombia [member] | Later than two year [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reform income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  |
Colombia [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of special increase in income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |
Colombia [member] | Bottom of range [member] | Less than 1 year [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  | 34.00% |  |  |  |  |  |  |  |
Colombia [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reform income tax rate |  |  |  |  |  |  |  | 35.00% |  |  |  |  |  |  |  |
Percentage of special increase in income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  |
Changes in tax rates or tax laws enacted or announced [member] | Argentina [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New tax on dividends paid to non-resident stockholders and resident individuals |  |  |  |  | 7.00% |  |  |  |  |  | 13.00% | 7.00% | 7.00% |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  | 25.00% | 30.00% | 35.00% |  |  |
Percentage of reduction in excise tax | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in tax rates or tax laws enacted or announced [member] | Argentina [member] | Sales taxes in the province of Buenos Aires [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% | 1.75% |  |
Changes in tax rates or tax laws enacted or announced [member] | Argentina [member] | Sales Tax in City of Buenos Aires [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  |  |  |  |  |  |  | 0.00% | 0.50% | 1.00% | 1.50% | 2.00% | 1.00% |  |
Changes in tax rates or tax laws enacted or announced [member] | Argentina [member] | 1-6 months [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reduction in excise tax | 8.00% | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of increase in excise tax |  |  | 12.00% | 4.00% |  |  |  |  |  |  |  |  |  |  |  |
Changes in tax rates or tax laws enacted or announced [member] | Colombia [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum assumed income tax rate |  |  |  |  |  |  |  |  |  | 0.00% | 1.50% | 1.50% |  |  |  |
Capitalization ratio |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Municipality sales tax credited against payable income tax |  |  |  |  |  |  |  |  |  |  | 100.00% | 50.00% |  |  |  |
Changes in tax rates or tax laws enacted or announced [member] | Costa Rica [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value-added tax |  |  |  | 13.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of capital gains |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of withholding taxes on salaries of employees |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of withholding taxes on compensations of employees |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of tax rate that exceeds EBITDA |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |

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