XML 58 R47.htm IDEA: XBRL DOCUMENT
v3.8.0.1

13. Investment properties (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Investment Properties Tables |
Investment properties |
| December 31, 2016 | Write-offs and disposals | Depreciation | December 31, 2017
Investment properties | 57,968 | (244) | (72) | 57,652
Total | 57,968 | (244) | (72) | 57,652
| December 31, 2015 | Transfers | Write-offs and disposals | Reversal of estimated losses | Depreciation | December 31, 2016
Investment properties | 56,957 | 1,231 | (124) | 10 | (106) | 57,968
Total | 56,957 | 1,231 | (124) | 10 | (106) | 57,968
| December 31, 2014 | Transfers | Write-offs and disposals | Depreciation | December 31, 2015
Investment properties | 54,039 | 9,182 | (5,859) | (405) | 56,957
Total | 54,039 | 9,182 | (5,859) | (405) | 56,957

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

X
- References No definition available. + Details
Name: | SBS_SummaryOfInvestmentPropertiesTableTextBlock
Namespace Prefix: | SBS_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration