| r0.c0 | Disclosure of expenses/Current | venj-bw2-i:ExpensesDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r1.c0 | Disclosure of expenses of employee benefits/Current | venj-bw2-i:EmployeeBenefitsExpensesDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r2.c0 | Disclosure of wages, salaries, social security contributions, and pension costs/Current | ocw-i:WagesSalariesSocialSecurityContributionsPensionCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r3.c0 | Disclosure of wages and salaries/Current | venj-bw2-i:WagesSalariesDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r4.c0 | Disclosure of social security contributions/Current | venj-bw2-i:SocialSecurityContributionsDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r5.c0 | Disclosure of pension costs/Current | venj-bw2-i:PensionCostsDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r6.c0 | Disclosure of wages, salaries, social security contributions, and pension costs [title]/Current | ocw-abstr:WagesSalariesSocialSecurityContributionsPensionCostsDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r7.c0 | Disclosure of other expenses of employee benefits/Current | rj-i:EmployeeBenefitsExpensesOtherDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r8.c0 | Disclosure of allocation employee benefits/Current | ocw-i:EmployeeBenefitsAllocationDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r9.c0 | Disclosure of expenses for personnel non on payroll/Current | ocw-i:PersonnelNotOnPayrollExpensesDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r10.c0 | Disclosure of other personnel related expenses, other/Current | ocw-i:OtherEmployeeBenefitsExpensesOtherDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r11.c0 | Disclosure of other personnel related expenses [title]/Current | ocw-abstr:EmployeeBenefitsExpensesOtherDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r12.c0 | Disclosure of payments received reducing personnel expenses/Current | ocw-i:PaymentsReceivedReducingPersonnelExpensesDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r13.c0 | Disclosure of employee expenses [title]/Current | ocw-abstr:EmployeeExpensesDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r14.c0 | Disclosure of amortisation of intangible assets and depreciation of property, plant and equipment/Current | venj-bw2-i:DepreciationPropertyPlantEquipmentAmortisationIntangibleAssetsDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r15.c0 | Disclosure of amortisation of intangible assets/Current | venj-bw2-i:AmortisationIntangibleAssetsDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r16.c0 | Disclosure of depreciation of property, plant and equipment/Current | venj-bw2-i:DepreciationPropertyPlantEquipmentDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r17.c0 | Disclosure of depreciation of property, plant and equipment and amortisation of intangible assets [title]/Current | kvk-abstr:DepreciationPropertyPlantEquipmentAmortisationIntangibleAssetsDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r18.c0 | Disclosure of accommodation costs/Current | rj-i:AccommodationCostsDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r19.c0 | Disclosure of rental expenses/Current | ocw-i:AccommodationRentalCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r20.c0 | Disclosure of insurance costs/Current | ocw-i:AccommodationInsuranceCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r21.c0 | Disclosure of accommodation maintenance and repair costs/Current | ocw-i:AccommodationMaintenanceAndRepairCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r22.c0 | Disclosure of energy and water costs/Current | ocw-i:AccommodationEnergyWaterCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r23.c0 | Disclosure of cleaning costs/Current | ocw-i:AccommodationCleaningCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r24.c0 | Disclosure of environmental and building taxes/Current | ocw-i:AccommodationEnvironmentalAndBuildingTaxesDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r25.c0 | Disclosure of additions for accomodation related maintenance provisions/Current | ocw-i:AccommodationMaintenanceProvisionsAdditionsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r26.c0 | Disclosure of other accomodation costs/Current | ocw-i:AccommodationCostsOtherDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r27.c0 | Disclosure of accommodation costs [title]/Current | kvk-abstr:AccommodationCostsDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r28.c0 | Disclosure of other operating expenses/Current | venj-bw2-i:OperatingExpensesOtherDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r29.c0 | Disclosure of general and administrative expenses/Current | venj-bw2-i:GeneralAdministrativeExpensesDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r30.c0 | Disclosure of costs of inventory and appliances/Current | ocw-i:InventoryAppliancesCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r31.c0 | Disclosure of expenses for teaching materials/Current | ocw-i:TeachingMaterialsCostsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r32.c0 | Disclosure of allocation for other operational facilities/Current | ocw-i:OperationalFacilitiesOtherAllocationDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r33.c0 | Disclosure of other expenses, other/Current | ocw-i:OtherOperationalExpensesOtherDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r34.c0 | Disclosure of other expenses [title]/Current | kvk-abstr:ExpensesOtherDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r35.c0 | Disclosure of revaluation reserve realised/Current | ocw-i:RevaluationReserveRealisedDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r36.c0 | Disclosure of auditors fees/Current | venj-bw2-i:AuditorsFeesDisclosure | nl-types:formattedExplanationItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r37.c0 | Disclosure of auditors' fees, audit of the financial statements/Current | ocw-i:AuditorsFeesAuditFinancialStatementsDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r38.c0 | Disclosure of auditors' fees, other audit procedures/Current | ocw-i:AuditorsFeesOtherAuditProceduresDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r39.c0 | Disclosure of auditors' fees relating to tax services/Current | ocw-i:AuditorsFeesTaxServicesDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r40.c0 | Disclosure of auditors' fees relating to other non-audit procedures/Current | ocw-i:AuditorsFeesOtherNonAuditServicesDisclosure | nl-types:string100000ItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r41.c0 | Disclosure of organisational auditor fees separate specification [title]/Current | ocw-abstr:AuditorsFeesSeparateSpecificationDisclosureTitle | xbrli:stringItemType | duration | ocw-dm:ActualsMember | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |