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4. Cash and Cash Equivalents and Financial Investments (Details Narrative) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash And Cash Equivalents And Financial Investments Details Narrative
Cash, cash eqivalents, and financial investments	R$ 6,369,928	R$ 5,701,849	R$ 3,973,162

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- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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