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v3.19.1

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Exchange Rates Used for Translation of Foreign Currencies (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of transactions in foreign currency [line items] |  |  |
Closing exchange rate | 0.5221 |  |
Argentina [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.7311 | 1.1489 | 1.2632
Closing exchange rate | 0.5221 | 1.0610 |
Brazil [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 5.2937 | 5.9346 | 5.3868
Closing exchange rate | 5.0797 | 5.9815 |
Colombia [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.0065 | 0.0064 | 0.0061
Closing exchange rate | 0.0061 | 0.0066 |
Guatemala [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 2.5591 | 2.5755 | 2.4548
Closing exchange rate | 2.5440 | 2.6940 |
U.S.A. [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 19.2397 | 18.9400 | 18.6529
Closing exchange rate | 19.6829 | 19.7867 |
Uruguay [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.6274 | 0.6606 | 0.6206
Closing exchange rate | 0.6074 | 0.6869 |
Nicaragua [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.6097 | 0.6307 | 0.6515
Closing exchange rate | 0.6088 | 0.6428 |
Honduras [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.7994 | 0.8007 | 0.8109
Closing exchange rate | 0.8031 | 0.8330 |
Chile [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.0300 | 0.0292 | 0.0276
Closing exchange rate | 0.0283 | 0.0322 |
Paraguay [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.0034 | 0.0034 | 0.0033
Closing exchange rate | 0.0033 | 0.0035 |
Peru [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 5.8517 | 5.8054 | 5.5232
Closing exchange rate | 5.8406 | 6.0976 |
Dominican Republic [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.3876 | 0.3983 | 0.4048
Closing exchange rate | 0.3898 | 0.4095 |
Costa Rica [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.0332 | 0.0331 | 0.0338
Closing exchange rate | 0.0322 | 0.0346 |
European Union [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 22.7101 | 21.3649 | 20.6334
Closing exchange rate | 22.5586 | 23.7539 |
Bulgaria [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 11.6110 | 10.9223 | 10.5483
Closing exchange rate | 11.5327 | 12.1406 |
Belarus [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 9.4451 | 9.8087 | 9.3929
Closing exchange rate | 9.1319 | 9.9882 |
Croatia [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 3.0613 | 2.8619 | 2.7392
Closing exchange rate | 3.0435 | 3.1954 |
Macedonia [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.3688 | 0.3471 | 0.3350
Closing exchange rate | 0.3667 | 0.3861 |
Serbia [member] |  |  |
Disclosure of transactions in foreign currency [line items] |  |  |
Average exchange rate | 0.1920 | 0.1762 | 0.1676
Closing exchange rate | 0.1907 | 0.2009 |

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