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v3.19.1

Employee Benefits - Schedule of Plan Assets Invested (Detail) | Dec. 31, 2018 | Dec. 31, 2017
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Puerto Rico [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Equity instruments | 37.00% | 37.00%
Debt instruments | 60.00% | 61.00%
Others | 3.00% | 2.00%
Total | 100.00% | 100.00%
Brazil [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Equity instruments |  | 6.00%
Debt instruments | 94.00% | 88.00%
Others | 6.00% | 6.00%
Total | 100.00% | 100.00%
Mexico [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Equity instruments | 39.00% | 61.00%
Debt instruments | 61.00% | 39.00%
Total | 100.00% | 100.00%

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