XML 77 R66.htm IDEA: XBRL DOCUMENT
v3.19.1

31. Other operating income (expenses), net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Other Operating Income Expenses Net Tables Abstract |
Other operating income (expenses), net |
| 2018 | 2017 | 2016
Other operating income, net | 93,089 | 75,410 | 62,570
Other operating expenses | (64,498) | (81,089) | (57,848)
Other operating income (expenses), net | 28,591 | (5,679) | 4,722

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

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