| r0.c0 | Premiums from individual insurance policies/Current | venj-bw2-i:PremiumsFromIndividualInsurancePolicies | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r0.c1 | Premiums from individual insurance policies/Previous | venj-bw2-i:PremiumsFromIndividualInsurancePolicies | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r1.c0 | Premiums from group insurance policies/Current | venj-bw2-i:PremiumsFromGroupInsurancePolicies | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r1.c1 | Premiums from group insurance policies/Previous | venj-bw2-i:PremiumsFromGroupInsurancePolicies | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r2.c0 | Premiums from agreements where the investment risk lies with party entitled to payment/Current | venj-bw2-i:PremiumsFromAgreementsWhereInvestmentRiskLiesWithThePartyEntitledToPayment | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r2.c1 | Premiums from agreements where the investment risk lies with party entitled to payment/Previous | venj-bw2-i:PremiumsFromAgreementsWhereInvestmentRiskLiesWithThePartyEntitledToPayment | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r3.c0 | Single life premiums and recurring payments/Current | venj-bw2-i:SingleLifePremiumsAndRecurringPayments | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r3.c1 | Single life premiums and recurring payments/Previous | venj-bw2-i:SingleLifePremiumsAndRecurringPayments | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r4.c0 | Premiums written/Current | venj-bw2-i:PremiumsWritten | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r4.c1 | Premiums written/Previous | venj-bw2-i:PremiumsWritten | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | venj-bw2-dm:LifeInsuranceMember | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |