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CASH AND CASH EQUIVALENTS, AND SHORT AND LONG-TERM INVESTMENTS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH AND CASH EQUIVALENTS, AND SHORT AND LONG-TERM INVESTMENTS
Cash	R$ 9,060	R$ 12,302
Banks and immediately available investments	4,608,144	2,629,350
Total cash and cash equivalents	4,617,204	2,641,652	R$ 2,890,144	R$ 2,555,338
Short-term investments	R$ 3,041,143	R$ 3,652,949

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- References

No definition available.

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- Definition

The amount of cash on hand and demand deposits. [Refer: Cash on hand]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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The amount of 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.

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The amount of short-term deposits held by the entity that are not classified as cash equivalents. [Refer: Cash equivalents]

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