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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 |
--- | --- | ---
Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | [1] | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($) | Dec. 31, 2018 USD ($) | [1]
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |  |
Remeasurements of the net defined benefits liability | $ 551 | $ 28 | $ (7) | $ (167) |
Valuation of the effective portion of derivative financial instruments | (592) | $ (30) | (439) | $ 1,732 |
Accumulated other comprehensive income | 9,053 |  | 18,267 |  | $ 461
Non-controlling interest [member] |  |  |  |  |
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |  |
Exchange differences on translation foreign operation | 3,134 |  | 7,150 |  |
Remeasurements of the net defined benefits liability | (119) |  | (274) |  |
Valuation of the effective portion of derivative financial instruments | (163) |  | 56 |  |
Accumulated other comprehensive income | $ 2,852 |  | $ 6,932 |  |
[1] | Convenience translation to U.S. dollars ($) - See Note 2.2.3

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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 2018-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_91_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_7&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_91_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_7&doctype=Standard -URIDate 2018-03-16 + Details
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