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: