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| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:NumberOfOwnedRentalUnits | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentals | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRentLoss | y |
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| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedNetValueRentals | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueContributions | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueIncomeFromSales | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherReceipts | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueResidualValue | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueMaintenanceExpenses | y |
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| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherOperatingExpenses | y |
|
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueImprovementExpenses | y |
|
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueOtherExpenses | y |
|
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueLandlordLevy | y |
|
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:DiscountedValueRemediationLevy | y |
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| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:BusinessValue | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:BusinessValue | y |
|
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y | | period | $FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y | | period | $FinancialReportingPeriodFirstPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y | | period | $FinancialReportingPeriodSecondPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y | | period | $FinancialReportingPeriodThirdPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y | | period | $FinancialReportingPeriodFourthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y | | period | $FinancialReportingPeriodFifthPeriodEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | bzk-ti-dm:DAEBActivitiesMember | x |
| | concept | bzk-aw-wsw-i:AverageRemainingEconomicLife | y |
|