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IMPAIRMENT OF INVESTMENT IN BOA VISTA SERVICOS (Detail) BRL in Millions, $ in Millions | Mar. 31, 2016 BRL | Mar. 31, 2016 USD ($) | Dec. 31, 2015 BRL
--- | --- | --- | ---
Schedule of Cost-method Investments [Line Items] |  |  |
Investment in Boa Vista Servicos S.A. (BVS) | BRL | BRL 44 |  | BRL 44
Cumulative Translation Adjustment |  | $ 38.2 |
Boa Vista Servicos Sociedad Anonima |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |
Investment in Boa Vista Servicos S.A. (BVS) |  | $ 12.3 |
Boa Vista Servicos Sociedad Anonima |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |
Business acquisition, percentage of voting interests acquired | 15.00% | 15.00% |

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