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Non-Controlling Interest in Consolidated Subsidiaries - Summary of Non-Controlling Interest's Accumulated Other Comprehensive Income (Detail) $ in Millions, $ in Millions | 12 Months Ended |
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Dec. 31, 2019 MXN ($) | Dec. 31, 2019 USD ($) | [1] | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($) | [2] | Dec. 31, 2019 USD ($) | [1]
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |  |  |
Remeasurements of the net defined benefits liability | $ (1,090) |  | $ (58) | $ 551 | $ (7) |
Valuation of the effective portion of derivative financial instruments | (980) |  | $ (52) | (592) | $ (439) |
Accumulated other comprehensive income | 685 | [3] |  | 9,053 |  | $ 36
Non-controlling interest [member] |  |  |  |  |  |
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |  |  |
Exchange differences on translation foreign operation | (699) |  |  | 3,134 |  |
Remeasurements of the net defined benefits liability | (390) |  |  | (119) |  |
Valuation of the effective portion of derivative financial instruments | (611) |  |  | (163) |  |
Accumulated other comprehensive income | $ (1,700) |  |  | $ 2,852 |  |
[1] | Convenience translation to U.S. dollars ($) – See Note 2.2.3
[2] | Revised to reflect the discontinued operations of Coca-Cola FEMSA Philippines – See Note 4.2.1
[3] | The Company initially adopted IFRS 16 at January 1st, 2019 using the modified retrospectively approach under which the comparative information is not restated. – See Note 2.4.1

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- Definition The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of other comprehensive income, net of tax, related to exchange differences when financial statements of foreign operations are translated. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of other comprehensive income, net of tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
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