| r0.c0 | Number of other units (incl. intramural)/Forecast reporting year | bzk-aw-wsw-i:NumberOfOtherUnitsIncludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r0.c1 | Number of other units (incl. intramural)/First forecast year | bzk-aw-wsw-i:NumberOfOtherUnitsIncludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r0.c2 | Number of other units (incl. intramural)/Second forecast year | bzk-aw-wsw-i:NumberOfOtherUnitsIncludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r0.c3 | Number of other units (incl. intramural)/Third forecast year | bzk-aw-wsw-i:NumberOfOtherUnitsIncludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r0.c4 | Number of other units (incl. intramural)/Fourth forecast year | bzk-aw-wsw-i:NumberOfOtherUnitsIncludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r0.c5 | Number of other units (incl. intramural)/Fifth forecast year | bzk-aw-wsw-i:NumberOfOtherUnitsIncludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r1.c0 | Market value other units/Forecast reporting year | bzk-aw-wsw-i:MarketValueOtherUnits | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r1.c1 | Market value other units/First forecast year | bzk-aw-wsw-i:MarketValueOtherUnits | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r1.c2 | Market value other units/Second forecast year | bzk-aw-wsw-i:MarketValueOtherUnits | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r1.c3 | Market value other units/Third forecast year | bzk-aw-wsw-i:MarketValueOtherUnits | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r1.c4 | Market value other units/Fourth forecast year | bzk-aw-wsw-i:MarketValueOtherUnits | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r1.c5 | Market value other units/Fifth forecast year | bzk-aw-wsw-i:MarketValueOtherUnits | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r2.c0 | Total market value/Forecast reporting year | bzk-aw-wsw-i:TotalMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r2.c1 | Total market value/First forecast year | bzk-aw-wsw-i:TotalMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r2.c2 | Total market value/Second forecast year | bzk-aw-wsw-i:TotalMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r2.c3 | Total market value/Third forecast year | bzk-aw-wsw-i:TotalMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r2.c4 | Total market value/Fourth forecast year | bzk-aw-wsw-i:TotalMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r2.c5 | Total market value/Fifth forecast year | bzk-aw-wsw-i:TotalMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r3.c0 | Total policy value/Forecast reporting year | bzk-aw-wsw-i:TotalPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r3.c1 | Total policy value/First forecast year | bzk-aw-wsw-i:TotalPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r3.c2 | Total policy value/Second forecast year | bzk-aw-wsw-i:TotalPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r3.c3 | Total policy value/Third forecast year | bzk-aw-wsw-i:TotalPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r3.c4 | Total policy value/Fourth forecast year | bzk-aw-wsw-i:TotalPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r3.c5 | Total policy value/Fifth forecast year | bzk-aw-wsw-i:TotalPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r4.c0 | Market value autonomous movement/Forecast reporting year | bzk-aw-wsw-i:AutonomousMovementMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r4.c1 | Market value autonomous movement/First forecast year | bzk-aw-wsw-i:AutonomousMovementMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r4.c2 | Market value autonomous movement/Second forecast year | bzk-aw-wsw-i:AutonomousMovementMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r4.c3 | Market value autonomous movement/Third forecast year | bzk-aw-wsw-i:AutonomousMovementMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r4.c4 | Market value autonomous movement/Fourth forecast year | bzk-aw-wsw-i:AutonomousMovementMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r4.c5 | Market value autonomous movement/Fifth forecast year | bzk-aw-wsw-i:AutonomousMovementMarketValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r5.c0 | Policy value autonomous movement/Forecast reporting year | bzk-aw-wsw-i:AutonomousMovementPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r5.c1 | Policy value autonomous movement/First forecast year | bzk-aw-wsw-i:AutonomousMovementPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r5.c2 | Policy value autonomous movement/Second forecast year | bzk-aw-wsw-i:AutonomousMovementPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r5.c3 | Policy value autonomous movement/Third forecast year | bzk-aw-wsw-i:AutonomousMovementPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r5.c4 | Policy value autonomous movement/Fourth forecast year | bzk-aw-wsw-i:AutonomousMovementPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |
| r5.c5 | Policy value autonomous movement/Fifth forecast year | bzk-aw-wsw-i:AutonomousMovementPolicyValue | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:DAEBActivitiesMember |