| r0.c0 | Premiums from individual insurance policies/Current | jenv-bw2-i:PremiumsFromIndividualInsurancePolicies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | Premiums from individual insurance policies/Previous | jenv-bw2-i:PremiumsFromIndividualInsurancePolicies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r1.c0 | Premiums from group insurance policies/Current | jenv-bw2-i:PremiumsFromGroupInsurancePolicies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c1 | Premiums from group insurance policies/Previous | jenv-bw2-i:PremiumsFromGroupInsurancePolicies | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r2.c0 | Premiums of agreements where the beneficiary bears the investment risk, of agreements with and of agreements without profit sharing/Current | jenv-bw2-i:PremiumsFromAgreementsWhereInvestmentRiskLiesWithThePartyEntitledToPayment | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c1 | Premiums of agreements where the beneficiary bears the investment risk, of agreements with and of agreements without profit sharing/Previous | jenv-bw2-i:PremiumsFromAgreementsWhereInvestmentRiskLiesWithThePartyEntitledToPayment | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r3.c0 | Single life premiums and recurring payments/Current | jenv-bw2-i:SingleLifePremiumsAndRecurringPayments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c1 | Single life premiums and recurring payments/Previous | jenv-bw2-i:SingleLifePremiumsAndRecurringPayments | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |
| r4.c0 | Premiums written/Current | jenv-bw2-i:PremiumsWritten | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r4.c1 | Premiums written/Previous | jenv-bw2-i:PremiumsWritten | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | jenv-bw2-dm:LifeInsuranceMember | $FinancialReportingPeriodPreviousStartDateParam/$FinancialReportingPeriodPreviousEndDateParam |