| r0.c0 | Housing facilities were sold under conditions at reporting year-end/kvk-table_NotesSalesRealEstateConditionalBreakdownHousingTable-x.1.1.1 | bzk-ti-i:HousingFacilitiesSoldUnderConditions | xbrli:nonNegativeIntegerItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r1.c0 | New buildings housing facilities were sold under conditions at reporting year-end/kvk-table_NotesSalesRealEstateConditionalBreakdownHousingTable-x.1.1.1 | bzk-ti-i:HousingFacilitiesSoldUnderConditionsNewBuildings | xbrli:nonNegativeIntegerItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r2.c0 | Existing housing facilities were sold under conditions at reporting year-end/kvk-table_NotesSalesRealEstateConditionalBreakdownHousingTable-x.1.1.1 | bzk-ti-i:HousingFacilitiesSoldUnderConditionsExistingBuildings | xbrli:nonNegativeIntegerItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |