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v3.19.1

Post-Employment and Other Non-Current Employee Benefits - Balances of Liabilities for Summary of Variable Return Financial Instruments Recorded at Market Values (Detail) | Dec. 31, 2018 | Dec. 31, 2017
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Variable return: |  |
Fixed and variable trust assets | 100.00% | 100.00%
Trading equity securities [member] |  |
Fixed return: |  |
Fixed return | 25.00% | 14.00%
Life annuities [member] |  |
Fixed return: |  |
Fixed return | 20.00% | 12.00%
Bank instruments [member] |  |
Fixed return: |  |
Fixed return | 4.00% | 6.00%
Federal government instruments [member] |  |
Fixed return: |  |
Fixed return | 32.00% | 50.00%
Publicly traded shares [member] |  |
Variable return: |  |
Variable return | 19.00% | 18.00%

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- Definition Fixed Return [abstract] + References No definition available. + Details
Name: | kof_FixedReturnAbstract
Namespace Prefix: | kof_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Trust assets fixed and variable return percentage. + References No definition available. + Details
Name: | kof_TrustAssetsFixedAndVariableReturnPercentage
Namespace Prefix: | kof_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Trust assets fixed return percentage. + References No definition available. + Details
Name: | kof_TrustAssetsFixedReturnPercentage
Namespace Prefix: | kof_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Trust assets variable return percentage. + References No definition available. + Details
Name: | kof_TrustAssetsVariableReturnPercentage
Namespace Prefix: | kof_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Variable Return [abstract] + References No definition available. + Details
Name: | kof_VariableReturnAbstract
Namespace Prefix: | kof_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_TradingEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=kof_LifeAnnuitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=kof_BankInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=kof_FederalGovernmentInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=kof_PubliclyTradedSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |