| r0.c0 | Bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | venj-bw2-i:BondsOtherFixedIncomeSecurities | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r1.c0 | Accumulated depreciation and impairment of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesAccumulatedDepreciationImpairments | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r2.c0 | kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-y.1/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | | | | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r3.c0 | Additions to bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesAdditions | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r4.c0 | Disposals of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesDisposals | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r5.c0 | Depreciation of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesDepreciation | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r6.c0 | Depreciation of disposals of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesDisposalsDepreciation | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r7.c0 | Impairment of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesImpairment | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r8.c0 | Reversal of impairment of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesImpairmentReversal | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r9.c0 | Movement of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesMovement | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r10.c0 | kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-y.2/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | | | | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r11.c0 | Bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | venj-bw2-i:BondsOtherFixedIncomeSecurities | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r12.c0 | Accumulated depreciation and impairment of bonds and other fixed-income securities/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | rj-i:BondsOtherFixedIncomeSecuritiesAccumulatedDepreciationImpairments | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r13.c0 | kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-y.3/kvk-table_NotesBondsOtherFixedIncomeSecuritiesMovementBanksTable-x.1.1 | | | | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |