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Capital Management - Additional Information (Detail) - BRL (R$)
R$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net Debt And Corresponding Gearing Ratios [abstract]      
Capital to maintain above minimum capital requirement 1.00% 1.00%  
Contracts under financial covenants R$ 1,219,853 R$ 1,217,308 R$ 876,147