| r0.c0 | Number of improvement existing property/Forecast reporting year | bzk-ww-i:NumberImprovementExistingProperty | bzk-ww-types:nonNegative1DecimalItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | Number of improvement existing property/First forecast year | bzk-ww-i:NumberImprovementExistingProperty | bzk-ww-types:nonNegative1DecimalItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r0.c2 | Number of improvement existing property/Second forecast year | bzk-ww-i:NumberImprovementExistingProperty | bzk-ww-types:nonNegative1DecimalItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r0.c3 | Number of improvement existing property/Third forecast year | bzk-ww-i:NumberImprovementExistingProperty | bzk-ww-types:nonNegative1DecimalItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r0.c4 | Number of improvement existing property/Fourth forecast year | bzk-ww-i:NumberImprovementExistingProperty | bzk-ww-types:nonNegative1DecimalItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r0.c5 | Number of improvement existing property/Fifth forecast year | bzk-ww-i:NumberImprovementExistingProperty | bzk-ww-types:nonNegative1DecimalItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r1.c0 | Property improvement expenses of improvement existing property/Forecast reporting year | bzk-ww-i:ImprovementExistingPropertyImprovementExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c1 | Property improvement expenses of improvement existing property/First forecast year | bzk-ww-i:ImprovementExistingPropertyImprovementExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r1.c2 | Property improvement expenses of improvement existing property/Second forecast year | bzk-ww-i:ImprovementExistingPropertyImprovementExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r1.c3 | Property improvement expenses of improvement existing property/Third forecast year | bzk-ww-i:ImprovementExistingPropertyImprovementExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r1.c4 | Property improvement expenses of improvement existing property/Fourth forecast year | bzk-ww-i:ImprovementExistingPropertyImprovementExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r1.c5 | Property improvement expenses of improvement existing property/Fifth forecast year | bzk-ww-i:ImprovementExistingPropertyImprovementExpenses | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r2.c0 | Market value mutation of improvement existing property/Forecast reporting year | bzk-ww-i:ImprovementExistingPropertyMarketValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c1 | Market value mutation of improvement existing property/First forecast year | bzk-ww-i:ImprovementExistingPropertyMarketValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r2.c2 | Market value mutation of improvement existing property/Second forecast year | bzk-ww-i:ImprovementExistingPropertyMarketValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r2.c3 | Market value mutation of improvement existing property/Third forecast year | bzk-ww-i:ImprovementExistingPropertyMarketValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r2.c4 | Market value mutation of improvement existing property/Fourth forecast year | bzk-ww-i:ImprovementExistingPropertyMarketValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r2.c5 | Market value mutation of improvement existing property/Fifth forecast year | bzk-ww-i:ImprovementExistingPropertyMarketValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r3.c0 | Policy value mutation of improvement existing property/Forecast reporting year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c1 | Policy value mutation of improvement existing property/First forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r3.c2 | Policy value mutation of improvement existing property/Second forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r3.c3 | Policy value mutation of improvement existing property/Third forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r3.c4 | Policy value mutation of improvement existing property/Fourth forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r3.c5 | Policy value mutation of improvement existing property/Fifth forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |