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5. Risk Management (Details 4) - BRL (R$) R$ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | R$ 14,937,415 |
Accounts payables to suppliers and contractors |  | 344,947 |
Services payable |  | 408,275 | R$ 460,054
Public-Private Partnership - PPP | [1] | 6,807,392 |
Program contract commitments |  | 269,753 |
2018 |  |  |
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | 2,221,645 |
Accounts payables to suppliers and contractors |  | 344,947 |
Services payable |  | 408,275 |
Public-Private Partnership - PPP | [1] | 185,816 |
Program contract commitments |  | 128,820 |
2019 |  |  |
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | 2,321,046 |
Accounts payables to suppliers and contractors |  | 0 |
Services payable |  | 0 |
Public-Private Partnership - PPP | [1] | 368,156 |
Program contract commitments |  | 92,505 |
2020 |  |  |
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | 2,648,021 |
Accounts payables to suppliers and contractors |  | 0 |
Services payable |  | 0 |
Public-Private Partnership - PPP | [1] | 368,156 |
Program contract commitments |  | 15,639 |
2021 |  |  |
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | 1,134,162 |
Accounts payables to suppliers and contractors |  | 0 |
Services payable |  | 0 |
Public-Private Partnership - PPP | [1] | 368,156 |
Program contract commitments |  | 15,779 |
2022 |  |  |
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | 1,077,914 |
Accounts payables to suppliers and contractors |  | 0 |
Services payable |  | 0 |
Public-Private Partnership - PPP | [1] | 368,156 |
Program contract commitments |  | 1,029 |
2023 onwards |  |  |
SummaryOfRiskManagementLineItems [Line Items] |  |  |
Borrowings and financing |  | 5,534,627 |
Accounts payables to suppliers and contractors |  | 0 |
Services payable |  | 0 |
Public-Private Partnership - PPP | [1] | 5,148,952 |
Program contract commitments |  | R$ 15,981 |
[1] | The Company also considered future commitments (construction not yet performed) still not recognized in the financial statements related to Sao Lourenco PPP, due to the relevance of future cash flows, the impacts on its operations and the fact the Company already has formalized this commitment through an agreement signed by the parties.

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- Definition Public-Private Partnerships, or &#8220;PPPs&#8221;, are long-term contracts between private parties and government entities, for providing a public asset or service, in which the private parties bears significant risk and management responsibility, and remuneration is linked to performance. PPPs are regulated by the State of S&#227;o Paulo through Law No. 11,688/2004, which was enacted on May 19, 2004. PPPs may be used for: (i) implantation, expansion, improvement, reform, maintenance or management of public infrastructure; (ii) provision of public services; and (iii) exploitation of public assets and non material rights belonging to the State. + References No definition available. + Details
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