| r0.c0 | With which municipalities have you made new performance agreements in the period 16 December 2017 - 15 December 2018? We request that you place these performance agreements on your website./Current | bzk-aw-wsw-i:PresentationArrangementsMunicipality | nl-types:string100000ItemType | instant | bzk-aw-wsw-dm:DataCorporationMember | $FinancialReportingPeriodCurrentEndDateParam |
| r1.c0 | Number of tenant organisation involved/Current | bzk-aw-wsw-i:NumberOfTenantOrganisationInvolved | xbrli:nonNegativeIntegerItemType | instant | bzk-aw-wsw-dm:DataCorporationMember | $FinancialReportingPeriodCurrentEndDateParam |