XML 133 R118.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Benefits - Summary of Defined Benefit Plan Expected Future Benefit Payments (Detail) $ in Millions | Dec. 31, 2017 MXN ($)
--- | ---
Disclosure of defined benefit plans [line items] |
2018 | $ 683
2019 | 305
2020 | 423
2021 | 335
2022 | 342
2023 to 2027 | 2,527
Pension and retirement plans [member] |
Disclosure of defined benefit plans [line items] |
2018 | 611
2019 | 233
2020 | 351
2021 | 263
2022 | 270
2023 to 2027 | 2,115
Seniority premiums [member] |
Disclosure of defined benefit plans [line items] |
2018 | 53
2019 | 52
2020 | 50
2021 | 48
2022 | 47
2023 to 2027 | 254
Postretirement medical services [member] |
Disclosure of defined benefit plans [line items] |
2018 | 19
2019 | 20
2020 | 22
2021 | 24
2022 | 25
2023 to 2027 | $ 158

X
- Definition Defined benefit plan expected future benefit payments in year five. + References No definition available. + Details
Name: | fmx_DefinedBenefitPlanExpectedFutureBenefitPaymentYearFive
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined benefit plan expected future benefit payments year four. + References No definition available. + Details
Name: | fmx_DefinedBenefitPlanExpectedFutureBenefitPaymentYearFour
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined benefit plan expected future benefit payments year six to ten. + References No definition available. + Details
Name: | fmx_DefinedBenefitPlanExpectedFutureBenefitPaymentYearSixToTen
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined benefit plan expected future benefit payments year three. + References No definition available. + Details
Name: | fmx_DefinedBenefitPlanExpectedFutureBenefitPaymentYearThree
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined benefit plan expected future benefit payments year two. + References No definition available. + Details
Name: | fmx_DefinedBenefitPlanExpectedFutureBenefitPaymentYearTwo
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined benefit plan expected future benefit payments next twelve months. + References No definition available. + Details
Name: | fmx_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths1
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=fmx_PensionAndRetirementPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=fmx_SeniorityPremiumsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=fmx_PostRetirementMedicalServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |