| r0.c0 | Current liabilities relating to financing surplus/Current | rj-i:LiabilitiesFinancingSurplusCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c1 | Current liabilities relating to financing surplus/Previous | rj-i:LiabilitiesFinancingSurplusCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Current subordinated liabilities/Current | venj-bw2-i:SubordinatedLiabilitiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c1 | Current subordinated liabilities/Previous | venj-bw2-i:SubordinatedLiabilitiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Current convertible borrowings/Current | venj-bw2-i:ConvertibleBorrowingsCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c1 | Current convertible borrowings/Previous | venj-bw2-i:ConvertibleBorrowingsCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Current other debentures and private loans/Current | venj-bw2-i:DebenturesOtherPrivateLoansCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c1 | Current other debentures and private loans/Previous | venj-bw2-i:DebenturesOtherPrivateLoansCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Current finance lease liabilities/Current | rj-i:FinanceLeaseLiabilitiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c1 | Current finance lease liabilities/Previous | rj-i:FinanceLeaseLiabilitiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Current payables to credit institutions/Current | venj-bw2-i:PayablesCreditInstitutionsCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c1 | Current payables to credit institutions/Previous | venj-bw2-i:PayablesCreditInstitutionsCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Current advances received/Current | venj-bw2-i:AdvancesReceivedCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c1 | Current advances received/Previous | venj-bw2-i:AdvancesReceivedCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Current trade payables/Current | venj-bw2-i:TradePayablesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c1 | Current trade payables/Previous | venj-bw2-i:TradePayablesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | Current bills of exchange and cheques payable/Current | venj-bw2-i:BillsExchangeChequesPayableCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c1 | Current bills of exchange and cheques payable/Previous | venj-bw2-i:BillsExchangeChequesPayableCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Current payables to group companies/Current | venj-bw2-i:PayablesGroupCompaniesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c1 | Current payables to group companies/Previous | venj-bw2-i:PayablesGroupCompaniesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | Current payables to other related parties/Current | venj-bw2-i:PayablesOtherRelatedPartiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c1 | Current payables to other related parties/Previous | venj-bw2-i:PayablesOtherRelatedPartiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c0 | Current payables to receivables shareholders and participating interests/Current | venj-bw2-i:PayablesShareholdersParticipatingInterestsCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r11.c1 | Current payables to receivables shareholders and participating interests/Previous | venj-bw2-i:PayablesShareholdersParticipatingInterestsCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c0 | Current taxes payable and social security contributions payable/Current | venj-bw2-i:TaxesSocialSecurityContributionsPayableCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r12.c1 | Current taxes payable and social security contributions payable/Previous | venj-bw2-i:TaxesSocialSecurityContributionsPayableCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r13.c0 | Current pension related payables/Current | venj-bw2-i:PensionPayablesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r13.c1 | Current pension related payables/Previous | venj-bw2-i:PensionPayablesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r14.c0 | Repayment obligations of non-current borrowings/Current | venj-bw2-i:RepaymentObligationsOfNoncurrentBorrowings | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r14.c1 | Repayment obligations of non-current borrowings/Previous | venj-bw2-i:RepaymentObligationsOfNoncurrentBorrowings | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r15.c0 | DBCs and DBC-healthcare products in progress (liabilities)/Current | rj-i:DBCsDBCHealthcareProductsInProgressLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r15.c1 | DBCs and DBC-healthcare products in progress (liabilities)/Previous | rj-i:DBCsDBCHealthcareProductsInProgressLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r16.c0 | Obligations for granting rights on vacation days/Current | rj-i:PayablesVacationDaysHolidayPay | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r16.c1 | Obligations for granting rights on vacation days/Previous | rj-i:PayablesVacationDaysHolidayPay | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r17.c0 | Current other payables/Current | venj-bw2-i:PayablesOtherCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r17.c1 | Current other payables/Previous | venj-bw2-i:PayablesOtherCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r18.c0 | Current accruals and deferred income/Current | venj-bw2-i:AccrualsAndDeferredIncomeCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r18.c1 | Current accruals and deferred income/Previous | venj-bw2-i:AccrualsAndDeferredIncomeCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r19.c0 | Current liabilities/Current | venj-bw2-i:LiabilitiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r19.c1 | Current liabilities/Previous | venj-bw2-i:LiabilitiesCurrent | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodPreviousEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |