XML 94 R83.htm IDEA: XBRL DOCUMENT
v3.19.1

8. Restricted cash (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
SummaryOfRestrictedCashLineItems [Line Items] |  |
Restricted cash | R$ 31,900 | R$ 18,822
Agreement with the Sao Paulo municipal government |  |
SummaryOfRestrictedCashLineItems [Line Items] |  |
Restricted cash | 19,977 | 12,055
Brazilian Federal Savings - escrow deposit |  |
SummaryOfRestrictedCashLineItems [Line Items] |  |
Restricted cash | 5,880 | 1,209
Other |  |
SummaryOfRestrictedCashLineItems [Line Items] |  |
Restricted cash | R$ 6,043 | R$ 5,558

X
- References No definition available. + Details
Name: | SBS_SummaryOfRestrictedCashLineItems
Namespace Prefix: | SBS_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_RestrictedCashAndCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=SBS_RestrictedCash1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=SBS_RestrictedCash3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=SBS_RestrictedCash4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |