| r0.c0 | Commercial real estate in exploitation/Current | bzk-ww-i:CommercialRealEstateInExploitation | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | Commercial real estate in exploitation/Previous | bzk-ww-i:CommercialRealEstateInExploitation | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodPreviousEndDateParam |
| r1.c0 | Real estate sold subject to terms and conditions/Current | rj-i:RealEstateSoldSubjectTermsConditions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r1.c1 | Real estate sold subject to terms and conditions/Previous | rj-i:RealEstateSoldSubjectTermsConditions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodPreviousEndDateParam |
| r2.c0 | Real estate in development for own exploitation/Current | bzk-ww-i:RealEstateInDevelopmentForOwnExploitation | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r2.c1 | Real estate in development for own exploitation/Previous | bzk-ww-i:RealEstateInDevelopmentForOwnExploitation | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodPreviousEndDateParam |
| r3.c0 | Investment properties/Current | rj-i:InvestmentProperties | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r3.c1 | Investment properties/Previous | rj-i:InvestmentProperties | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodPreviousEndDateParam |