| r0.c0 | Realised changes in value of investments in group companies/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | Realised changes in value of investments in group companies/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r1.c0 | Realised changes in value of investments in other participating interests/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c1 | Realised changes in value of investments in other participating interests/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r2.c0 | Realised changes in value of investments in land and buildings/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c1 | Realised changes in value of investments in land and buildings/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r3.c0 | Realised changes in value of investments in other investments/Current | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInInvestmentsOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c1 | Realised changes in value of investments in other investments/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestmentsInInvestmentsOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r4.c0 | Realised changes in value of investments/Current | jenv-bw2-i:RealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r4.c1 | Realised changes in value of investments/Previous | jenv-bw2-i:RealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r5.c0 | Unrealised changes in value of investments in group companies/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r5.c1 | Unrealised changes in value of investments in group companies/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInGroupCompanies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r6.c0 | Unrealised changes in value of investments in other participating interests/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r6.c1 | Unrealised changes in value of investments in other participating interests/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r7.c0 | Unrealised changes in value of investments in land and buildings/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r7.c1 | Unrealised changes in value of investments in land and buildings/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInLandAndBuildings | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r8.c0 | Unrealised changes in value of investments other investments/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r8.c1 | Unrealised changes in value of investments other investments/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestmentsInOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r9.c0 | Unrealised changes in value of investments/Current | jenv-bw2-i:UnrealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r9.c1 | Unrealised changes in value of investments/Previous | jenv-bw2-i:UnrealisedChangesInValueOfInvestments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:SeparateMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |