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Securities - Summary of securities on the financial liabilities classified at fair value through profit or loss (Detail) - BRL (R$)
R$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of offsetting of financial liabilities [line items]      
Securities loaned R$ 721,131 R$ 2,021,707 R$ 1,259,579
Cost [member]      
Disclosure of offsetting of financial liabilities [line items]      
Securities loaned R$ 721,131 R$ 2,021,707 R$ 1,259,579