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15. Intangible assets (Details 2) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
SummaryOfIntangibleAssetsLineItems [Line Items] |  |
Current liabilities | R$ 137,827 | R$ 60,007
Noncurrent liabilities | 3,275,297 | 3,011,409
Liabilities | 3,413,124 | 3,071,416
Alto Tiete |  |
SummaryOfIntangibleAssetsLineItems [Line Items] |  |
Current liabilities | 39,283 | 35,083
Noncurrent liabilities | 252,093 | 282,501
Liabilities | 291,376 | 317,584
Sao Lourenco |  |
SummaryOfIntangibleAssetsLineItems [Line Items] |  |
Current liabilities | 98,544 | 24,924
Noncurrent liabilities | 3,023,204 | 2,728,908
Liabilities | R$ 3,121,748 | R$ 2,753,832

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- Definition Public-Private Partnerships, or &amp;#8220;PPPs&amp;#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&amp;#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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- References No definition available. + Details
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- Definition Public-Private Partnerships, or &amp;#8220;PPPs&amp;#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&amp;#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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- References No definition available. + Details
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- Details
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- Details
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