| r0.c0 | Accounting principles for determining the result/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:AccountingPrinciplesForDeterminingTheResult | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Policy of interest income and related income/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:InterestIncomeRelatedIncomePolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Policy of interest from bonds and other fixed-income securities/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:InterestFromBondsAndOtherFixedIncomeSecuritiesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Policy of other interest income and related income/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:InterestIncomeRelatedIncomeOtherPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Policy of interest expenses and related expenses/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:InterestExpensesRelatedExpensesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Policy of income from securities and investments in participating interests/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:IncomeFromSecuritiesAndInvestmentsInParticipatingInterestsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Policy of income from shares and other variable-yield securities/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:IncomeFromSharesAndOtherVariableYieldSecuritiesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Policy of income from group companies/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:IncomeFromParticipatingInterestsInGroupCompaniesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | Policy of income from other investments in participating interests/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:IncomeFromOtherInvestmentsInParticipatingInterestsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Policy of commissions received/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:CommissionsReceivedAndReceivablePolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | Policy of commissions paid/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:CommissionsPaidAndPayablePolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c0 | Policy of result from financial transactions/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ResultFromFinancialTransactionsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c0 | Policy of other operating income/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:OperatingIncomeOtherPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r13.c0 | Policy of operating income/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:OperatingIncomePolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r14.c0 | Policy of employee benefits expenses and general administrative expenses/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:EmployeeBenefitsAndOtherAdministrativeExpensesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r15.c0 | Policy of expenses of employee benefits/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:EmployeeBenefitsExpensesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r16.c0 | Policy of wages and salaries/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:WagesSalariesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r17.c0 | Policy of social security contributions/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:SocialSecurityContributionsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r18.c0 | Applied policy of pension costs/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:PensionCostsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r19.c0 | Policy of other expenses/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:OtherAdministrativeExpensesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r20.c0 | Policy of amortisation and changes in value of intangible assets and depreciation and changes in value of property, plant and equipment/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:DepreciationAmortisationAndChangesValuePropertyPlantEquipmentIntangibleAssetsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r21.c0 | Policy of other operating expenses/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:OperatingExpensesOtherPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r22.c0 | Policy of decrease in value of receivables and provisions for on balance sheet commitments/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:DecreaseInValueOfReceivablesAndProvisionsForOnBalanceSheetCommitmentsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r23.c0 | Policy of release of decrease in value of receivables and provisions for on balance sheet commitments/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:DecreaseInValueReleaseOfReceivablesAndProvisionsForOnBalanceSheetCommitmentsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r24.c0 | Policy of decrease in value of non-current securities and investments in participating interests/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:DecreaseInValueOfNoncurrentSecuritiesAndInvestmentsInParticipatingInterestsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r25.c0 | Policy of release of decrease in value of non-current securities and investments in participating interests/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:DecreaseInValueReleaseOfNoncurrentSecuritiesAndInvestmentsInParticipatingInterestsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r26.c0 | Policy of operating expenses/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:OperatingExpensesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r27.c0 | Policy of result from ordinary activities before tax/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ResultBeforeTaxOrdinaryActivitiesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r28.c0 | Policy of income tax expense from ordinary activities/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:IncomeTaxExpenseOrdinaryActivitiesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r29.c0 | Policy of result from ordinary activities after tax/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ResultAfterTaxOrdinaryActivitiesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r30.c0 | Policy of extraordinary income/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ExtraordinaryIncomePolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r31.c0 | Policy of extraordinary expenses/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ExtraordinaryExpensesPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r32.c0 | Policy of income tax expense from extraordinary items/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:IncomeTaxExpenseExtraordinaryItemsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r33.c0 | Policy of result from extraordinary items after tax/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ResultAfterTaxExtraordinaryItemsPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r34.c0 | Policy of result after tax/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ResultAfterTaxPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r35.c0 | Policy of result attributable to non-controlling interest/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:ResultAttributableNoncontrollingInterestPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r36.c0 | Policy of net result after tax/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | venj-bw2-i:NetResultAfterTaxPolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r37.c0 | Policy of earnings per share/kvk-table_NotesConsolidatedAccountingPrinciplesResultBanksTable-x.1.1.1 | rj-i:EarningsPerSharePolicy | nl-types:string100000ItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |