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| | concept | bzk-dvi-i:EquityProvidedOrGuaranteed | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:GrantedPriorExemption | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:TransactionsWithFinancialInstitutions | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:TransactionsCriteriaWithFinancialInstitutions | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:DecisionsTakenDuringTheReportingPeriod | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:DecisionsSubmittedForApproval | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:HomesSoldToOwnerOccupiersOrSocialRealEstate | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:SalesTermsOwnerOccupiersTenants | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:SalesOfSharesInSubsidiaryCompanies | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:ApprovedSalesOfSharesInSubsidiaryCompanies | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:ActivitiesWhichBelongToNonDaebActivities | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:PermissionForActivitiesWhichBelongToNonDaebActivities | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:LegalObligationsAndProvisionsForSocialRealEstate | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:MultipleTendering | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:DerivativeTransactions | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:RegulationRegardingDerivates | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:NewInvestmentTransactionsClosed | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:RegulationRegardingInvestments | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:InvestmentsAsReferredToInTheRegulations | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:MinimumRatingRequirements | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:AgreementsConcludedWithThirdParties | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:AccuracyAndCompletenessOfTheHomeAllocation | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:ActivitiesAsReferredToTheHousingAct | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:PreApprovedByTheMinister | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:ProvidingAvailableFinancialResources | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:CollegialLoans | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:CollegialLoansRequirements | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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| | concept | bzk-dvi-i:LiveabilityActivitiesInMunicipalities | y | | jenv-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | jenv-bw2-dim:FinancialStatementsTypeAxis | jenv-bw2-dm:ConsolidatedMember | x | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x |
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