| r0.c0 | Book value of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsBookValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-y.1/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | | | | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Price differences of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsPriceDifferences | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Revaluations of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsRevaluations | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Acquisitions of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsAcquisitions | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Sales of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsSales | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Other movements of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsMovementOther | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Movement of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsMovement | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-y.2/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | | | | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Book value of investments/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | rj-i:InvestmentsBookValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-y.3/kvk-table_NotesConsolidatedBookValueInvestmentsMovementInvestmentFirmTable-x.1.1.1 | | | | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |