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Financial Assets and Liabilities - Summary of Marketable Securities (Detail) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of Marketable Securities [line items] |  |
Marketable securities | R$ 4,388,007 | R$ 3,669,109
Government security [member] |  |
Disclosure of Marketable Securities [line items] |  |
Marketable securities | 4,371,645 | 3,543,886
CDB [member] |  |
Disclosure of Marketable Securities [line items] |  |
Marketable securities | 1,051 | 116,963
ESG funds |  |
Disclosure of Marketable Securities [line items] |  |
Marketable securities | 15,311 |
Repurchase agreements [Member] |  |
Disclosure of Marketable Securities [line items] |  |
Marketable securities |  | R$ 8,260

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