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]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph B13
-Subparagraph a
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

5 Cash and Cash Equivalents (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	R$ 2,941,727	R$ 1,948,409	R$ 1,040,075	R$ 982,073
Cash and Bank Accounts [Member]
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	263,188	167,728
Financial Investments with Immediate Liquidity [Member]
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	R$ 2,678,539	R$ 1,780,681