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Other Current Assets and Other Current Financial Assets - Summary of Prepaid Expenses (Detail) - MXN ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Prepaid expenses [abstract] |  |
Advances for inventories | $ 1,311 | $ 1,243
Advertising and promotional expenses paid in advance | 509 | 367
Advances to service suppliers | 1 | 142
Prepaid insurance | 24 | 39
Others | 31 | 58
Total | $ 1,876 | $ 1,849

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- Definition The amount of current advances made to suppliers before goods or services are received. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount recognised as a current asset for expenditures made prior to the period when the economic benefit will be realised. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Advances for inventories. + References No definition available. + Details
Name: | kof_AdvancesForInventories
Namespace Prefix: | kof_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Other prepaid expenses. + References No definition available. + Details
Name: | kof_OtherPrepaidExpenses
Namespace Prefix: | kof_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Prepaid advertising and promotional expenses. + References No definition available. + Details
Name: | kof_PrepaidAdvertisingAndPromotionalExpenses
Namespace Prefix: | kof_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Prepaid expenses. + References No definition available. + Details
Name: | kof_PrepaidExpensesAbstract
Namespace Prefix: | kof_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Prepaid insurance 1. + References No definition available. + Details
Name: | kof_PrepaidInsurance1
Namespace Prefix: | kof_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant