| r0.c0 | Earned premiums for own account/Current | jenv-bw2-i:EarnedPremiumsForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r0.c1 | Earned premiums for own account/Previous | jenv-bw2-i:EarnedPremiumsForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r1.c0 | Income from investments/Current | jenv-bw2-i:IncomeFromInvestments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r1.c1 | Income from investments/Previous | jenv-bw2-i:IncomeFromInvestments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r2.c0 | Other technical income for own account/Current | jenv-bw2-i:OtherTechnicalIncomeForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r2.c1 | Other technical income for own account/Previous | jenv-bw2-i:OtherTechnicalIncomeForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r3.c0 | Damages for own account/Current | jenv-bw2-i:DamagesForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r3.c1 | Damages for own account/Previous | jenv-bw2-i:DamagesForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r4.c0 | Change in other technical provisions for own account/Current | jenv-bw2-i:ChangeInOtherTechnicalProvisionsForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r4.c1 | Change in other technical provisions for own account/Previous | jenv-bw2-i:ChangeInOtherTechnicalProvisionsForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r5.c0 | Profit sharing and discounts/Current | jenv-bw2-i:ProfitSharingAndDiscounts | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r5.c1 | Profit sharing and discounts/Previous | jenv-bw2-i:ProfitSharingAndDiscounts | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r6.c0 | Operating expenses/Current | jenv-bw2-i:OperatingExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r6.c1 | Operating expenses/Previous | jenv-bw2-i:OperatingExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r7.c0 | Other technical expenses for own account/Current | jenv-bw2-i:OtherTechnicalExpensesForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r7.c1 | Other technical expenses for own account/Previous | jenv-bw2-i:OtherTechnicalExpensesForOwnAccount | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r8.c0 | Change in equalisation reserve/Current | jenv-bw2-i:ChangeInEqualisationReserve | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r8.c1 | Change in equalisation reserve/Previous | jenv-bw2-i:ChangeInEqualisationReserve | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r9.c0 | Result technical account damage insurance/Current | jenv-bw2-i:ResultTechnicalAccountDamageInsurance | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |
| r9.c1 | Result technical account damage insurance/Previous | jenv-bw2-i:ResultTechnicalAccountDamageInsurance | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam | jenv-bw2-dm:TechnicalAccountDamageInsuranceMember |