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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, 2017	Dec. 31, 2016	Dec. 31, 2015
Argentina [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	1.1489	1.2632	1.7152
Closing exchange rate	1.0610	1.3047
Brazil [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	5.9346	5.3868	4.8068
Closing exchange rate	5.9815	6.3611
Colombia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0064	0.0061	0.0058
Closing exchange rate	0.0066	0.0069
Guatemala [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	2.5755	2.4548	2.0704
Closing exchange rate	2.6940	2.7561
U.S.A. [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	18.9400	18.6529	15.8504
Closing exchange rate	19.7867	20.7314
Uruguay [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.6606	0.6206	0.5810
Closing exchange rate	0.6869	0.7066
Nicaragua [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.6307	0.6515	0.5813
Closing exchange rate	0.6428	0.7071
Honduras [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.8007	0.8109	0.7171
Closing exchange rate	0.8330	0.8759
Chile [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0292	0.0276	0.0243
Closing exchange rate	0.0322	0.0310
Paraguay [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0034	0.0033	0.0031
Closing exchange rate	0.0035	0.0036
Peru [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	5.8054	5.5232	4.9746
Closing exchange rate	6.0976	6.1701
Dominican Republic [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.3983	0.4048	0.3515
Closing exchange rate	0.4095	0.4438
Costa Rica [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0331	0.0338	0.0293
Closing exchange rate	0.0346	0.0369
European Union [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	21.3649	20.6334	17.3886
Closing exchange rate	23.7539	21.8032
Bulgaria [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	10.9223	10.5483	9.3785
Closing exchange rate	12.1406	11.1561
Belarus [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	9.8087	9.3929	9.9808
Closing exchange rate	9.9882	10.5622
Croatia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	2.8619	2.7392	2.4096
Closing exchange rate	3.1954	2.8886
Macedonia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.3471	0.3350	0.2984
Closing exchange rate	0.3861	0.3546
Serbia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.1762	0.1676	0.1517
Closing exchange rate	0.2009	0.1768

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The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

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