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Short-term Investments - Summary of Short-term Investments (Parenthetical) (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Short-term Investments [line items] |  |
Listed securities indexed rate | 100.00% | 95.00%
Other comprehensive income [member] |  |
Disclosure of Short-term Investments [line items] |  |
Change in fair vair in OCI | R$ (938) | R$ 954

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- Definition Percentage of listed securities indexed rate. + References No definition available. + Details
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- Details
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