| r0.c0 | Policy value housings units/First forecast year | bzk-ww-i:PolicyValueUnitsLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFirstPeriodEndDateParam |
| r0.c1 | Policy value housings units/Second forecast year | bzk-ww-i:PolicyValueUnitsLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodSecondPeriodEndDateParam |
| r0.c2 | Policy value housings units/Third forecast year | bzk-ww-i:PolicyValueUnitsLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodThirdPeriodEndDateParam |
| r0.c3 | Policy value housings units/Fourth forecast year | bzk-ww-i:PolicyValueUnitsLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFourthPeriodEndDateParam |
| r0.c4 | Policy value housings units/Fifth forecast year | bzk-ww-i:PolicyValueUnitsLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFifthPeriodEndDateParam |
| r1.c0 | Market value units excluding living space/First forecast year | bzk-ww-i:MarketValueUnitsExcludingLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFirstPeriodEndDateParam |
| r1.c1 | Market value units excluding living space/Second forecast year | bzk-ww-i:MarketValueUnitsExcludingLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodSecondPeriodEndDateParam |
| r1.c2 | Market value units excluding living space/Third forecast year | bzk-ww-i:MarketValueUnitsExcludingLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodThirdPeriodEndDateParam |
| r1.c3 | Market value units excluding living space/Fourth forecast year | bzk-ww-i:MarketValueUnitsExcludingLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFourthPeriodEndDateParam |
| r1.c4 | Market value units excluding living space/Fifth forecast year | bzk-ww-i:MarketValueUnitsExcludingLivingSpace | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFifthPeriodEndDateParam |
| r2.c0 | Total policy value/First forecast year | bzk-ww-i:TotalPolicyValue | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFirstPeriodEndDateParam |
| r2.c1 | Total policy value/Second forecast year | bzk-ww-i:TotalPolicyValue | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodSecondPeriodEndDateParam |
| r2.c2 | Total policy value/Third forecast year | bzk-ww-i:TotalPolicyValue | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodThirdPeriodEndDateParam |
| r2.c3 | Total policy value/Fourth forecast year | bzk-ww-i:TotalPolicyValue | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFourthPeriodEndDateParam |
| r2.c4 | Total policy value/Fifth forecast year | bzk-ww-i:TotalPolicyValue | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodFifthPeriodEndDateParam |