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Commitments - Additional Information (Detail) m³ in Thousands, R$ in Thousands, $ in Millions | Apr. 05, 2019 BRL (R$) m³ | Mar. 22, 2019 BRL (R$) m³ | Dec. 31, 2019 BRL (R$) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 BRL (R$)
--- | --- | --- | --- | --- | ---
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Investments | R$ |  |  | R$ 181,619 |  | R$ 129,087
Area port lease [member] | IPP [member] |  |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Percentage of consortium owned | 50.00% |  |  |  |
Investments | R$ |  | R$ 160,000 |  |  |
Term of concession |  | 25 years |  |  |
Port concessions description |  | These concessions were carried out by two consortiums of which IPP holds one third of the total participation. |  |  |
Number of periods that Port areas will be operated | 15 years |  |  |  |
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] |  |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Number of periods that Port areas will be operated | 25 years |  |  |  |
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] |  |  |  |  |
Estimated investments to port concessions | R$ | R$ 450,000 |  |  |  |
Aratu [member] |  |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Cargo rates per ton |  |  | 8.37 | 8.37 |
Suape [member] |  |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Cargo rates per ton |  |  | 2.54 | 2.54 |
Third parties [member] |  |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Liability insurance policies |  |  | R$ 1,612,000 | $ 400 |
directors and executive officers (D&O) [member] |  |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |  |
Liability insurance policies |  |  | R$ 322,000 | $ 80 |

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