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Commitments - Additional Information (Detail)
m³ in Thousands, R$ in Thousands
Apr. 05, 2019
BRL (R$)
Apr. 05, 2019
m³
Mar. 22, 2019
BRL (R$)
m³
Mar. 22, 2019
BRL (R$)
m³
Dec. 31, 2020
BRL (R$)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
BRL (R$)
Disclosure of commitments and contingencies [line items]              
Investments | R$         R$ 167,481   R$ 181,619
Area port lease [member] | IPP [member]              
Disclosure of commitments and contingencies [line items]              
Percentage of consortium owned 50.00%            
Investments | R$     R$ 160 R$ 160      
Area port lease [member] | IPP [member] | Area BEL02A [member]              
Disclosure of commitments and contingencies [line items]              
Minimum port storage capacity   41          
Area port lease [member] | IPP [member] | Area BEL04A [member]              
Disclosure of commitments and contingencies [line items]              
Minimum port storage capacity   23          
Area port lease [member] | IPP [member] | Paraiba [member] | Port of Cabedelo [member]              
Disclosure of commitments and contingencies [line items]              
Minimum port storage capacity       64      
Area port lease [member] | IPP [member] | Espirito Santo [member] | Port of Vitoria [member]              
Disclosure of commitments and contingencies [line items]              
Minimum port storage capacity     66        
Area port lease [member] | Ultracargo [member] | Area VDC12 [member]              
Disclosure of commitments and contingencies [line items]              
Minimum port storage capacity   59          
Area port lease [member] | IPP and Ultracargo [member]              
Disclosure of commitments and contingencies [line items]              
Port concessions description     These concessions were carried out by two consortiums of which IPP holds one third of the total participation.        
Estimated investments to port concessions | R$ R$ 450,000            
Aratu [member]              
Disclosure of commitments and contingencies [line items]              
Cargo rates per ton | $           8.37  
Suape [member]              
Disclosure of commitments and contingencies [line items]              
Cargo rates per ton | $           2.67  
Itaqui [Member]              
Disclosure of commitments and contingencies [line items]              
Cargo rates per ton | $           0.78  
Third parties [member]              
Disclosure of commitments and contingencies [line items]              
Liability insurance policies         1,299 $ 250,000  
directors and executive officers (D&O) [member]              
Disclosure of commitments and contingencies [line items]              
Liability insurance policies         R$ 416 $ 80,000