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v3.19.1

23. Knowledge retention program (Tables) | 12 Months Ended
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Dec. 31, 2018
Knowledge Retention Program |
Knowledge retention program |
Length of service at SABESP (years) | % of the Guarantee Fund for Length of Service (FGTS)
More than 15 | 40%
11 - 15 | 30%
6 - 10 | 15%
0 - 5 | 5%

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

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