| r0.c0 | Disclosure of liabilities/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:LiabilitiesDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Disclosure of payables in respect of direct insurance/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PayablesDirectInsuranceDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Disclosure of payables relating to reinsurance/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PayablesReinsuranceDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Disclosure of convertible borrowings/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:ConvertibleBorrowingsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Disclosure of other debentures and private loans/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:DebenturesOtherPrivateLoansDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Disclosure of payables to credit institutions/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PayablesCreditInstitutionsDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Disclosure of other payables/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PayablesOtherDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Disclosure of pension related payables/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PensionPayablesDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | Disclosure of non-current pension related payables/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PensionPayablesNoncurrentDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Disclosure of current pension related payables/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | venj-bw2-i:PensionPayablesCurrentDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | Disclosure of payables to central cash and health care insurance fund/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | rj-i:PayablesCentralCashAndHealthCareInsuranceFundDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c0 | Policy of payables to central cash/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | rj-i:PayablesCentralCashDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c0 | Disclosure of payables to healthcare providers/kvk-table_NotesConsolidatedLiabilitiesInsuranceTable-x.1.1.1 | rj-i:PayablesHealthcareProvidersDisclosure | nl-types:formattedExplanationItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |