| r0.c0 | In group companies/Current | jenv-bw2-i:IncomeFromInvestmentsInParticipatingInterestsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | In group companies/Previous | jenv-bw2-i:IncomeFromInvestmentsInParticipatingInterestsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r1.c0 | Income from investments in other participating interests/Current | jenv-bw2-i:IncomeFromInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c1 | Income from investments in other participating interests/Previous | jenv-bw2-i:IncomeFromInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r2.c0 | Income from investments in land and buildings/Current | jenv-bw2-i:IncomeFromInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c1 | Income from investments in land and buildings/Previous | jenv-bw2-i:IncomeFromInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r3.c0 | Income from investments in other investments/Current | jenv-bw2-i:IncomeFromInvestmentsInInvestmentsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c1 | Income from investments in other investments/Previous | jenv-bw2-i:IncomeFromInvestmentsInInvestmentsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r4.c0 | Income from investments/Current | jenv-bw2-i:IncomeFromInvestments | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r4.c1 | Income from investments/Previous | jenv-bw2-i:IncomeFromInvestments | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r5.c0 | Realised changes in value of investments in group companies/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r5.c1 | Realised changes in value of investments in group companies/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r6.c0 | Realised changes in value of investments in other participating interests/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r6.c1 | Realised changes in value of investments in other participating interests/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r7.c0 | Realised changes in value of investments in land and buildings/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r7.c1 | Realised changes in value of investments in land and buildings/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r8.c0 | Realised changes in value of investments in other investments/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInInvestmentsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r8.c1 | Realised changes in value of investments in other investments/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInInvestmentsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r9.c0 | Realised changes in value of investments/Current | jenv-bw2-i:RealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r9.c1 | Realised changes in value of investments/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r10.c0 | Unrealised changes in value of investments in group companies/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r10.c1 | Unrealised changes in value of investments in group companies/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r11.c0 | Unrealised changes in value of investments in other participating interests/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r11.c1 | Unrealised changes in value of investments in other participating interests/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r12.c0 | Unrealised changes in value of investments in land and buildings/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r12.c1 | Unrealised changes in value of investments in land and buildings/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r13.c0 | Unrealised changes in value of investments other investments/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r13.c1 | Unrealised changes in value of investments other investments/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r14.c0 | Unrealised changes in value of investments/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r14.c1 | Unrealised changes in value of investments/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r15.c0 | Other operating income/Current | jenv-bw2-i:OperatingIncomeOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r15.c1 | Other operating income/Previous | jenv-bw2-i:OperatingIncomeOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r16.c0 | Operating income/Current | jenv-bw2-i:OperatingIncome | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r16.c1 | Operating income/Previous | jenv-bw2-i:OperatingIncome | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r17.c0 | Expenses relating to investment management/Current | jenv-bw2-i:ExpensesRelatedToInvestmentManagement | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r17.c1 | Expenses relating to investment management/Previous | jenv-bw2-i:ExpensesRelatedToInvestmentManagement | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r18.c0 | Management expenses/Current | rj-i:ManagementExpenses | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r18.c1 | Management expenses/Previous | rj-i:ManagementExpenses | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r19.c0 | Custodian fees/Current | rj-i:CustodianFees | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r19.c1 | Custodian fees/Previous | rj-i:CustodianFees | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r20.c0 | Depreciation of investments in real estate/Current | jenv-bw2-i:DepreciationOfInvestmentsInRealEstate | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r20.c1 | Depreciation of investments in real estate/Previous | jenv-bw2-i:DepreciationOfInvestmentsInRealEstate | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r21.c0 | Depreciation of other property, plant and equipment and amortisation of intangible assets/Current | jenv-bw2-i:DepreciationOtherPropertyPlantEquipmentAmortisationIntangibleAssets | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r21.c1 | Depreciation of other property, plant and equipment and amortisation of intangible assets/Previous | jenv-bw2-i:DepreciationOtherPropertyPlantEquipmentAmortisationIntangibleAssets | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r22.c0 | Other operating expenses/Current | jenv-bw2-i:OperatingExpensesOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r22.c1 | Other operating expenses/Previous | jenv-bw2-i:OperatingExpensesOther | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r23.c0 | Operating expenses/Current | jenv-bw2-i:OperatingExpenses | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r23.c1 | Operating expenses/Previous | jenv-bw2-i:OperatingExpenses | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r24.c0 | Result before tax/Current | jenv-bw2-i:ResultBeforeTax | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r24.c1 | Result before tax/Previous | jenv-bw2-i:ResultBeforeTax | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r25.c0 | Income tax expense/Current | jenv-bw2-i:IncomeTaxExpense | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r25.c1 | Income tax expense/Previous | jenv-bw2-i:IncomeTaxExpense | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r26.c0 | Result from participating interests/Current | jenv-bw2-i:ShareInResultsParticipatingInterests | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r26.c1 | Result from participating interests/Previous | jenv-bw2-i:ShareInResultsParticipatingInterests | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r27.c0 | Result after tax/Current | jenv-bw2-i:ResultAfterTax | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r27.c1 | Result after tax/Previous | jenv-bw2-i:ResultAfterTax | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r28.c0 | Changes in reserves due to foreign currency translation/Current | jenv-bw2-i:ChangesInReservesDueToForeignCurrencyTranslation | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r28.c1 | Changes in reserves due to foreign currency translation/Previous | jenv-bw2-i:ChangesInReservesDueToForeignCurrencyTranslation | nl-types:monetaryNoDecimalsItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r29.c0 | Basic earnings per share/Current | rj-i:EarningsPerShareBasic | num:perShareItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r29.c1 | Basic earnings per share/Previous | rj-i:EarningsPerShareBasic | num:perShareItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r30.c0 | Diluted earnings per share/Current | rj-i:EarningsPerShareDiluted | num:perShareItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r30.c1 | Diluted earnings per share/Previous | rj-i:EarningsPerShareDiluted | num:perShareItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |