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Financial Instruments - Disclosure of Fair Value of Commodity Price Contracts (Detail) - Coca-Cola FEMSA [member] - MXN ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Sugar Price Contracts [member] | Less than 1 year [member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | $ 1,554 | $ 1,223
Fair Value Asset | 53 |
Fair Value Liability |  | (88)
Sugar Price Contracts [member] | 1-2 years [member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 98 |
Fair Value Asset | 15 |
Aluminum price contracts [member] | Less than 1 year [member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 394 | 265
Fair Value Asset | 4 |
Fair Value Liability |  | (17)
PX MEG contracts [member] | Less than 1 year [member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 320 | 1,303
Fair Value Liability | $ (28) | $ (131)

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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