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Non-Controlling Interest in Consolidated Subsidiaries - Summary of Changes in FEMSA's Non-Controlling Interest (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | [1] | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($)
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |
Balance at beginning of the period | $ 86,621 |  |  |
Capitalization of issued shares to former owners of Vonpar in Coca-Cola FEMSA |  |  | $ 4,082 |
Balance at end of the period | 78,489 | $ 3,997 | 86,621 |
Non-controlling interest [member] |  |  |  |
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |
Balance at beginning of the period | 86,621 |  | 74,266 | $ 60,332
Net income of non-controlling interest | 9,089 |  | (5,202) | 6,035
Other comprehensive income (loss): | (4,080) |  | 7,240 | 9,463
Exchange differences on translation of foreign operation | (4,016) |  | 7,349 | 9,238
Remeasurements of the net defined benefits liability | 155 |  | 30 | (63)
Valuation of the effective portion of derivative financial instruments | (219) |  | (139) | 288
Capitalization of issued shares to former owners of Vonpar in Coca-Cola FEMSA |  |  | 2,867 |
Other acquisitions and remeasurements | 413 |  | (50) | 1,710
(Derecognition) contribution from non-controlling interest | (11,140) |  | 11,072 | 892
Equity instruments |  |  |  | (485)
Dividends | (3,713) |  | (3,622) | (3,690)
Share based payment | 31 |  | 50 | 9
Balance at end of the period | 78,489 |  | $ 86,621 | $ 74,266
Non-controlling interest [member] | IAS 29 [member] |  |  |  |
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |
Accounting standard adoption effects | 1,418 |  |  |
Non-controlling interest [member] | Impact of adopting IFRS 9 [member] |  |  |  |
Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items] |  |  |  |
Accounting standard adoption effects | $ (150) |  |  |
[1] | Convenience translation to U.S. dollars ($) - See Note 2.2.3

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