| r0.c0 | Number of housing units (excl. intramural)/Forecast reporting year | bzk-aw-wsw-i:NumberOfHousingUnitsExcludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r0.c1 | Number of housing units (excl. intramural)/First forecast year | bzk-aw-wsw-i:NumberOfHousingUnitsExcludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r0.c2 | Number of housing units (excl. intramural)/Second forecast year | bzk-aw-wsw-i:NumberOfHousingUnitsExcludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r0.c3 | Number of housing units (excl. intramural)/Third forecast year | bzk-aw-wsw-i:NumberOfHousingUnitsExcludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r0.c4 | Number of housing units (excl. intramural)/Fourth forecast year | bzk-aw-wsw-i:NumberOfHousingUnitsExcludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r0.c5 | Number of housing units (excl. intramural)/Fifth forecast year | bzk-aw-wsw-i:NumberOfHousingUnitsExcludingIntramural | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r1.c0 | Market value housing units (excl. intramural)/Forecast reporting year | bzk-aw-wsw-i:MarketValueHousingUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r1.c1 | Market value housing units (excl. intramural)/First forecast year | bzk-aw-wsw-i:MarketValueHousingUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r1.c2 | Market value housing units (excl. intramural)/Second forecast year | bzk-aw-wsw-i:MarketValueHousingUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r1.c3 | Market value housing units (excl. intramural)/Third forecast year | bzk-aw-wsw-i:MarketValueHousingUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r1.c4 | Market value housing units (excl. intramural)/Fourth forecast year | bzk-aw-wsw-i:MarketValueHousingUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r1.c5 | Market value housing units (excl. intramural)/Fifth forecast year | bzk-aw-wsw-i:MarketValueHousingUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r2.c0 | Policy value housings units (excl. intramural)/Forecast reporting year | bzk-aw-wsw-i:PolicyValueHousingsUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r2.c1 | Policy value housings units (excl. intramural)/First forecast year | bzk-aw-wsw-i:PolicyValueHousingsUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r2.c2 | Policy value housings units (excl. intramural)/Second forecast year | bzk-aw-wsw-i:PolicyValueHousingsUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r2.c3 | Policy value housings units (excl. intramural)/Third forecast year | bzk-aw-wsw-i:PolicyValueHousingsUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r2.c4 | Policy value housings units (excl. intramural)/Fourth forecast year | bzk-aw-wsw-i:PolicyValueHousingsUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |
| r2.c5 | Policy value housings units (excl. intramural)/Fifth forecast year | bzk-aw-wsw-i:PolicyValueHousingsUnitsExcludingIntramural | nl-types:monetaryNoDecimalsItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | bzk-ti-dm:CompoundNonDAEBActivitiesMember |