| r0.c0 | Balance sheet before or after appropriation of results/Current | venj-bw2-i:BalanceSheetBeforeAfterAppropriationResults | venj-codes:profitAppropriationItemType | duration | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c1 | Balance sheet before or after appropriation of results/Previous | venj-bw2-i:BalanceSheetBeforeAfterAppropriationResults | venj-codes:profitAppropriationItemType | duration | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Intangible assets/Current | venj-bw2-i:IntangibleAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c1 | Intangible assets/Previous | venj-bw2-i:IntangibleAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Investments/Current | venj-bw2-i:Investments | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c1 | Investments/Previous | venj-bw2-i:Investments | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Investments for risk of policyholders and investments of annual life funds/Current | venj-bw2-i:InvestmentsForRiskOfPolicyHoldersAndInvestmentsOfAnnualLifeFunds | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c1 | Investments for risk of policyholders and investments of annual life funds/Previous | venj-bw2-i:InvestmentsForRiskOfPolicyHoldersAndInvestmentsOfAnnualLifeFunds | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Separated investment deposits of collective agreements for risk of policyholders/Current | rj-i:InvestmentsSeparateDepositsCollectiveAgreementsForRiskOfPolicyholders | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c1 | Separated investment deposits of collective agreements for risk of policyholders/Previous | rj-i:InvestmentsSeparateDepositsCollectiveAgreementsForRiskOfPolicyholders | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Receivables/Current | venj-bw2-i:Receivables | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c1 | Receivables/Previous | venj-bw2-i:Receivables | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Other assets/Current | venj-bw2-i:AssetsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c1 | Other assets/Previous | venj-bw2-i:AssetsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Prepayments and accrued income/Current | venj-bw2-i:AccruedIncome | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c1 | Prepayments and accrued income/Previous | venj-bw2-i:AccruedIncome | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | Derivative financial instruments (assets)/Current | venj-bw2-i:DerivativeFinancialInstrumentsAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c1 | Derivative financial instruments (assets)/Previous | venj-bw2-i:DerivativeFinancialInstrumentsAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Assets/Current | venj-bw2-i:Assets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c1 | Assets/Previous | venj-bw2-i:Assets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | Equity/Current | venj-bw2-i:Equity | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c1 | Equity/Previous | venj-bw2-i:Equity | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c0 | Non-controlling interest/Current | venj-bw2-i:NoncontrollingInterest | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c1 | Non-controlling interest/Previous | venj-bw2-i:NoncontrollingInterest | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c0 | Group equity/Current | venj-bw2-i:EquityGroup | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c1 | Group equity/Previous | venj-bw2-i:EquityGroup | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r13.c0 | Subordinated liabilities/Current | venj-bw2-i:SubordinatedLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r13.c1 | Subordinated liabilities/Previous | venj-bw2-i:SubordinatedLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r14.c0 | Technical provisions/Current | venj-bw2-i:TechnicalProvisions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r14.c1 | Technical provisions/Previous | venj-bw2-i:TechnicalProvisions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r15.c0 | Technical provisions for insurance where investments are for risk of policy holders and annual life funds/Current | venj-bw2-i:TechnicalProvisionsForInsuranceWhereInvestmentsAreForRiskOfPolicyHoldersAndAnnualLifeFunds | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r15.c1 | Technical provisions for insurance where investments are for risk of policy holders and annual life funds/Previous | venj-bw2-i:TechnicalProvisionsForInsuranceWhereInvestmentsAreForRiskOfPolicyHoldersAndAnnualLifeFunds | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r16.c0 | Provisions/Current | venj-bw2-i:Provisions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r16.c1 | Provisions/Previous | venj-bw2-i:Provisions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r17.c0 | Deposits of reinsurers/Current | venj-bw2-i:DepositsOfReinsurers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r17.c1 | Deposits of reinsurers/Previous | venj-bw2-i:DepositsOfReinsurers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r18.c0 | Liabilities/Current | venj-bw2-i:Liabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r18.c1 | Liabilities/Previous | venj-bw2-i:Liabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r19.c0 | Accruals and deferred income/Current | venj-bw2-i:AccrualsAndDeferredIncome | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r19.c1 | Accruals and deferred income/Previous | venj-bw2-i:AccrualsAndDeferredIncome | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r20.c0 | Derivative financial instruments (liabilities)/Current | venj-bw2-i:DerivativeFinancialInstrumentsLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r20.c1 | Derivative financial instruments (liabilities)/Previous | venj-bw2-i:DerivativeFinancialInstrumentsLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r21.c0 | Equity and liabilities/Current | venj-bw2-i:EquityAndLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r21.c1 | Equity and liabilities/Previous | venj-bw2-i:EquityAndLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |