| r0.c0 | Allocations/Current | bzk-dvi-i:Allocations | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c0 | Interest expenses allocated to investments by the cooperative/Current | bzk-ww-i:CashFlowStatementCorporationInvestmentsInterestExpenditure | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c0 | Activated production own business (sales, demolition, new buildings, purchase, accommodation improvement)/Current | bzk-ww-i:CashFlowStatementActivatedProductionOwnBusiness | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c0 | Part of payments to employees related to maintenance/Current | bzk-ww-i:CashFlowStatementMaintenanceEmployeeBenefitsExpenses | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r4.c0 | Part of payments to employees related to liveability/Current | bzk-ww-i:CashFlowStatementLiveabilityEmployeeBenefitsExpenses | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |