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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

X

- Definition

Public-Private Partnerships, or “PPPs”, 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 São 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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X

- Definition

Public-Private Partnerships, or “PPPs”, 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 São 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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X

- References

No definition available.

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- Details

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