XML 141 R125.htm IDEA: XBRL DOCUMENT
v3.19.1

Employee Benefits - Summary of Balances of the Liabilities for Employee Benefits (Detail) $ in Millions, $ in Millions | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | [1] | Dec. 31, 2017 MXN ($)
--- | --- | --- | --- | ---
Disclosure of defined benefit plans [line items] |  |  |
Total Employee Benefits | $ 4,699 | $ 239 | $ 5,373
Pension and retirement plans [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit obligation | 6,189 |  | 7,370
Defined benefit obligation funds at fair value | (2,501) |  | (3,131)
Net defined benefit liability | 3,688 |  | 4,239
Seniority premiums [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit obligation | 772 |  | 783
Defined benefit obligation funds at fair value | (111) |  | (109)
Net defined benefit liability | 661 |  | 674
Post retirement medical services [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit obligation | 418 |  | 524
Defined benefit obligation funds at fair value | (68) |  | (64)
Net defined benefit liability | $ 350 |  | $ 460
[1] | Convenience translation to U.S. dollars ($) - See Note 2.2.3

X
- Definition Defined benefit obligation funds at fair value. + References No definition available. + Details
Name: | fmx_DefinedBenefitObligationFundsAtFairValue
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_57_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DefinedBenefitObligationAtPresentValue
Namespace Prefix: | ifrs-full_
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
- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_140_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_LiabilityAssetOfDefinedBenefitPlans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of non-current provisions for employee benefits. [Refer: Provisions for employee benefits] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_d&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NoncurrentProvisionsForEmployeeBenefits
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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: |