| r0.c0 | Shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | venj-bw2-i:SharesOtherVariableYieldSecurities | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r1.c0 | Accumulated depreciation and impairment of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesAccumulatedDepreciationImpairments | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r2.c0 | Accumulated revaluations of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesAccumulatedRevaluations | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r3.c0 | kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-y.1/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | | | | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r4.c0 | Additions to shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesAdditions | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r5.c0 | Disposals of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesDisposals | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r6.c0 | Revaluations of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesRevaluations | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r7.c0 | Depreciation of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesDepreciation | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r8.c0 | Depreciation of disposals of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesDisposalsDepreciation | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r9.c0 | Impairment of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesImpairment | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r10.c0 | Reversal of impairment of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesImpairmentReversal | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r11.c0 | Movement of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesMovement | nl-types:monetaryNoDecimalsItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r12.c0 | kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-y.2/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | | | | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r13.c0 | Shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | venj-bw2-i:SharesOtherVariableYieldSecurities | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r14.c0 | Accumulated depreciation and impairment of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesAccumulatedDepreciationImpairments | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r15.c0 | Accumulated revaluations of shares and other variable-yield securities/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | rj-i:SharesOtherVariableYieldSecuritiesAccumulatedRevaluations | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |
| r16.c0 | kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-y.3/kvk-table_NotesSharesOtherVariableYieldSecuritiesMovementBanksTable-x.1.1 | | | | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:SeparateMember |