XML 80 R65.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Significant Accounting Policies - Disclosure of Exchange Rates of Local Currencies Translated to Mexican Pesos (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2017 $ / $ | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of significant accounting policies [line items] |  |  |
Exchange Rate as of | 19.6395 |  |
Guatemala [member] | Guatemala, Quetzal [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Quetzal |  |
Average Exchange Rate for | 2.57 | 2.46 | 2.07
Exchange Rate as of | 2.69 | 2.75 |
Costa Rica [member] | Costa Rica, Colon [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Colon |  |
Average Exchange Rate for | 0.03 | 0.03 | 0.03
Exchange Rate as of | 0.03 | 0.04 |
Panama [member] | U S dollar [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | U.S. dollar |  |
Average Exchange Rate for | 18.93 | 18.66 | 15.85
Exchange Rate as of | 19.74 | 20.66 |
Colombia [member] | Colombian peso [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Colombian peso |  |
Average Exchange Rate for | 0.01 | 0.01 | 0.01
Exchange Rate as of | 0.01 | 0.01 |
Nicaragua [member] | Nicaragua, Cordoba [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Cordoba |  |
Average Exchange Rate for | 0.63 | 0.65 | 0.58
Exchange Rate as of | 0.64 | 0.70 |
Argentina [member] | Argentine peso [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Argentine peso |  |
Average Exchange Rate for | 1.15 | 1.26 | 1.71
Exchange Rate as of | 1.06 | 1.30 |
Venezuela [member] | Venezuelan bolivar fuerte [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Bolivar |  |
Brazil [member] | Brazilian reais [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Reais |  |
Average Exchange Rate for | 5.94 | 5.39 | 4.81
Exchange Rate as of | 5.97 | 6.34 |
Chile [member] | Chilean peso [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Chilean peso |  |
Average Exchange Rate for | 0.03 | 0.03 | 0.02
Exchange Rate as of | 0.03 | 0.03 |
Euro Zone [member] | Euro [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Euro (€) |  |
Average Exchange Rate for | 21.32 | 20.66 | 17.60
Exchange Rate as of | 23.57 | 21.77 |
Peru [member] | Peru, Nuevo Sol [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Nuevo Sol |  |
Average Exchange Rate for | 5.78 | 5.53 | 4.99
Exchange Rate as of | 6.08 | 6.15 |
Ecuador [member] | Mexican peso [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Peso |  |
Average Exchange Rate for | 18.93 | 18.66 | 15.85
Exchange Rate as of | 19.74 | 20.66 |
Philippines [member] | Philippine peso [member] |  |  |
Disclosure of significant accounting policies [line items] |  |  |
Functional / Recording Currency | Philippine peso |  |
Average Exchange Rate for | 0.38 | 0.39 | 0.35
Exchange Rate as of | 0.40 | 0.41 |

X
- Definition Disclosure of significant accounting policies. + References No definition available. + Details
Name: | fmx_DisclosureOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | fmx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_AverageForeignExchangeRate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ClosingForeignExchangeRate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The description of the currency of the primary economic environment in which the entity operates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2017-01-01 -Paragraph 53 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_53&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2017-01-01 -Paragraph 57 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_57_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfFunctionalCurrency
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_GT
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_GTQ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_CRC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_PA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_COP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_NI
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_NIO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_AR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_ARS
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_VE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_VEF
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_BR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_BRL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_CLP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=fmx_EuroZoneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_PE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_PEN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_EC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_MXN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_PH
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_PHP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |