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| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodPreviousEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | period | $FinancialReportingPeriodPreviousEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueAutonomousDevelopmentCashFlowsRelease | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueAutonomousDevelopmentPushTheEffectOneYearForward | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueAutonomousDevelopmentMovement | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovementsSales | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovementDemolition | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovementNewBuildings | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovementPurchase | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovementClassificationChanges | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovementOtherInventoryMovement | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueInventoryMovement | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueParameterChangesIndexations | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueParameterChangesDiscountRate | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueParameterChangesEconomicLife | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueParameterChanges | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyRent | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyRentLoss | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyOtherReceipts | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyMaintenanceExpenses | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyEmployeeExpenses | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyOtherOperatingExpenses | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyGroundLease | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyLessorLevy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicyResidualValue | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesExploitationPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesDivestmentInvestmentPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesDivestmentInvestmentPolicyDemolition | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesDivestmentInvestmentPolicyImprovements | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueChangesDivestmentInvestmentPolicySales | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValueMovement | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | period | $FinancialReportingPeriodCurrentEndDateParam | y | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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