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Loans and Debentures - Summary of Principal Maturity Schedule (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Summary of loans debentures and finance leases [line items]    
Long term consolidated debt R$ 13,275,281 R$ 12,888,935
From 1 to 2 years [member]    
Summary of loans debentures and finance leases [line items]    
Long term consolidated debt 1,424,775 960,038
From 2 to 3 years [member]    
Summary of loans debentures and finance leases [line items]    
Long term consolidated debt 3,115,495 1,548,092
From 3 to 4 years [member]    
Summary of loans debentures and finance leases [line items]    
Long term consolidated debt 3,451,988 3,216,293
From 4 to 5 years [member]    
Summary of loans debentures and finance leases [line items]    
Long term consolidated debt 765,263 3,428,130
More than 5 years [member]    
Summary of loans debentures and finance leases [line items]    
Long term consolidated debt R$ 4,517,760 R$ 3,736,382