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| | concept | venj-bw2-i:AccountingPrinciplesForDeterminingTheResult | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultAfterTaxPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultAttributableNoncontrollingInterestPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultAfterTaxOrdinaryActivitiesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultBeforeTaxOrdinaryActivitiesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultTechnicalAccountDamageInsurancePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultTechnicalAccountLifeInsurancePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:EarnedPremiumsForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:PremiumsNetPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:PremiumsGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ReinsurancePremiumsCededPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInTechnicalProvisionsForUnearnedPremiumsAndUnexpiredRisksPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInTechnicalProvisionsForUnearnedPremiumsAndUnexpiredRisksGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInTechnicalProvisionsForUnearnedPremiumsAndUnexpiredRisksReinsuredPartPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInTechnicalProvisionsForUnearnedPremiumsForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AllocatedIncomeFromInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AllocatedIncomeFromInvestmentsTransferredFromTechnicalAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AllocatedIncomeFromInvestmentsTransferredToTechnicalAccountDamageInsurancePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeFromInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeFromInvestmentsInParticipatingInterestsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeFromOtherInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeFromOtherInvestmentsInLandAndBuildingsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeFromOtherInvestmentsInInvestmentsOtherPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncreaseInValueOfInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:RealisedProfitOnInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:UnrealisedProfitOnInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:OtherTechnicalIncomeForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:BenefitsForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:BenefitsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:BenefitsGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:BenefitsReinsuredPartPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionForBenefitsPayablePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionForBenefitsPayableGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionForBenefitsPayableReinsuredPartPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:DamagesForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:DamagesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:DamagesGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:DamagesReinsuredPartPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionDamagesPayablePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionDamagesPayableGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionDamagesPayableReinsuredPartPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInOtherTechnicalProvisionsForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionForLifeInsurancePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionForLifeInsuranceGrossPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInProvisionForLifeInsuranceReinsuredPartPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | rj-i:ChangeInOtherTechnicalProvisionsForOwnAccountOtherPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AcquisitionCostsAndChangeInDeferredAcquisitionCostsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AcquisitionCostsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInDeferredAcquisitionCostsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AdministrativeExpensesAndEmployeeBenefitsExpensesDepreciationOfPropertyPlantEquipmentPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:CommissionsAndProfitSharingReceivedFromReinsurersPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:InvestmentExpensesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:AdministrativeExpensesAndInterestExpensesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:DecreaseInValueOfInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:RealisedLossOnInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:UnrealisedLossOnInvestmentsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:OtherTechnicalExpensesForOwnAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeFromInvestmentsAllocatedToNonTechnicalAccountPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ChangeInEqualisationReservePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeOtherPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ExpensesOtherPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeTaxExpenseOrdinaryActivitiesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ResultAfterTaxExtraordinaryItemsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ExtraordinaryExpensesPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:ExtraordinaryIncomePolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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| | concept | venj-bw2-i:IncomeTaxExpenseExtraordinaryItemsPolicy | y | | period | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | x | | venj-bw2-dim:BasisOfPreparationAxis | $BasisOfPreparationParam | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:ConsolidatedMember | x |
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