XML 116 R102.htm IDEA: XBRL DOCUMENT v3.21.1

13 Investment properties (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment property [abstract]
Investment properties, beginning	R$ 47,562	R$ 47,620	R$ 57,652
Write-offs and disposals	0	0	(9,995)
Transfers	(1,240)	(9)	13
Depreciation	(48)	(49)	(50)
Investment properties, ending	R$ 46,274	R$ 47,562	R$ 47,620

X

- Definition

The amount of depreciation recognised on investment property. [Refer: Depreciation and amortisation expense; Investment property]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 40
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The decrease in investment property resulting from disposals. [Refer: Investment property]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2020-01-01
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-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-URIDate 2020-01-01

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee as a right-of-use asset) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2020-01-01
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Number 1
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Period Type:	instant

X

- References

No definition available.

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Data Type:	xbrli:stringItemType
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X

- Definition

The amount represents information related to transfers investment property.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration