| r0.c0 | Disclosure of technical provisions/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Disclosure of technical provisions for unearned premiums and unexpired risks/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsUnearnedPremiumsUnexpiredRisksDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Disclosure of gross technical provisions for unearned premiums and unexpired risks/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsUnearnedPremiumsUnexpiredRisksGrossDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Disclosure of reinsured part of technical provisions for unearned premiums and unexpired risks/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsUnearnedPremiumsUnexpiredRisksReinsuredPartDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Disclosure of portfolios with a negative premium provision/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:PortfoliosNegativePremiumProvisionDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Disclosure of catastrophe provision/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:CatastropheProvisionDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Disclosure of provision actuarial health insurance/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:ProvisionActuarialHealthInsuranceDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Disclosure of provision for aging population/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:ProvisionForAgingPopulationDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | Disclosure of provision for onerous contracts/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:ProvisionOnerousContractsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Disclosure of technical provisions for life insurance/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsLifeInsuranceDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | Disclosure of gross technical provisions for life insurance/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsLifeInsuranceGrossDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c0 | Disclosure of reinsured part of technical provisions for life insurance/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsLifeInsuranceReinsuredPartDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c0 | Disclosure of technical provisions for damages or benefits payable/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsForDamagesOrBenefitsPayableDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r13.c0 | Disclosure of gross technical provisions for damages or benefits payable/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsForDamagesOrBenefitsPayableGrossDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r14.c0 | Disclosure of reinsured part of technical provisions for damages or benefits payable/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsForDamagesOrBenefitsPayableReinsuredPartDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r15.c0 | Disclosure of discounting of technical provisions for damages or benefits payable/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:TechnicalProvisionsForDamagesOrBenefitsPayableDiscountingDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r16.c0 | Disclosure of technical provisions for profit sharing and discounts/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsProfitSharingAndDiscountsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r17.c0 | Disclosure of gross technical provisions for profit sharing and discounts/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsProfitSharingAndDiscountsGrossDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r18.c0 | Disclosure of reinsured part of technical provisions for profit sharing and discounts/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsProfitSharingAndDiscountsReinsuredPartDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r19.c0 | Disclosure of equalisation reserve/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:EqualisationReserveDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r20.c0 | Disclosure of gross equalisation reserve/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:EqualisationReserveGrossDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r21.c0 | Disclosure of reinsured part of the equalisation reserve/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:EqualisationReserveReinsuredPartDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r22.c0 | Disclosure of other technical provisions/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsOtherDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r23.c0 | Disclosure of gross other technical provisions/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsOtherGrossDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r24.c0 | Disclosure of reinsured part of other technical provisions/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:TechnicalProvisionsOtherReinsuredPartDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r25.c0 | Disclosure of liability relating to minimum return guarantee/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:MinimumReturnGuaranteeLiabilityDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r26.c0 | Disclosure of technical provision for discretionary profit sharing obligations/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | rj-i:TechnicalProvisionDiscretionaryProfitSharingObligationsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r27.c0 | Disclosure of technical provisions for deferred profit sharing obligations/kvk-table_NotesConsolidatedTechnicalProvisionsInsuranceTable-x.1.1.1 | venj-bw2-i:ProvisionDeferredProfitSharingObligationsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |