| r0.c0 | Net receipts rental living space/Forecast reporting year | bzk-ww-i:ReceiptsRentalLivingSpace | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | Net receipts rental living space/First forecast year | bzk-ww-i:ReceiptsRentalLivingSpace | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r0.c2 | Net receipts rental living space/Second forecast year | bzk-ww-i:ReceiptsRentalLivingSpace | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r0.c3 | Net receipts rental living space/Third forecast year | bzk-ww-i:ReceiptsRentalLivingSpace | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r0.c4 | Net receipts rental living space/Fourth forecast year | bzk-ww-i:ReceiptsRentalLivingSpace | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r0.c5 | Net receipts rental living space/Fifth forecast year | bzk-ww-i:ReceiptsRentalLivingSpace | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r1.c0 | Net receipts rental commercial real estate/Forecast reporting year | bzk-ww-i:ReceiptsRentalCommercialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c1 | Net receipts rental commercial real estate/First forecast year | bzk-ww-i:ReceiptsRentalCommercialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r1.c2 | Net receipts rental commercial real estate/Second forecast year | bzk-ww-i:ReceiptsRentalCommercialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r1.c3 | Net receipts rental commercial real estate/Third forecast year | bzk-ww-i:ReceiptsRentalCommercialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r1.c4 | Net receipts rental commercial real estate/Fourth forecast year | bzk-ww-i:ReceiptsRentalCommercialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r1.c5 | Net receipts rental commercial real estate/Fifth forecast year | bzk-ww-i:ReceiptsRentalCommercialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r2.c0 | Net receipts rental social real estate/Forecast reporting year | bzk-ww-i:ReceiptsRentalSocialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c1 | Net receipts rental social real estate/First forecast year | bzk-ww-i:ReceiptsRentalSocialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r2.c2 | Net receipts rental social real estate/Second forecast year | bzk-ww-i:ReceiptsRentalSocialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r2.c3 | Net receipts rental social real estate/Third forecast year | bzk-ww-i:ReceiptsRentalSocialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r2.c4 | Net receipts rental social real estate/Fourth forecast year | bzk-ww-i:ReceiptsRentalSocialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r2.c5 | Net receipts rental social real estate/Fifth forecast year | bzk-ww-i:ReceiptsRentalSocialRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r3.c0 | Net receipts rental intramural healthcare real estate/Forecast reporting year | bzk-ww-i:ReceiptsRentalIntramuralHealthcareRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c1 | Net receipts rental intramural healthcare real estate/First forecast year | bzk-ww-i:ReceiptsRentalIntramuralHealthcareRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r3.c2 | Net receipts rental intramural healthcare real estate/Second forecast year | bzk-ww-i:ReceiptsRentalIntramuralHealthcareRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r3.c3 | Net receipts rental intramural healthcare real estate/Third forecast year | bzk-ww-i:ReceiptsRentalIntramuralHealthcareRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r3.c4 | Net receipts rental intramural healthcare real estate/Fourth forecast year | bzk-ww-i:ReceiptsRentalIntramuralHealthcareRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r3.c5 | Net receipts rental intramural healthcare real estate/Fifth forecast year | bzk-ww-i:ReceiptsRentalIntramuralHealthcareRealEstate | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r4.c0 | Net receipts rental parking facilities/Forecast reporting year | bzk-ww-i:ReceiptsRentalParkingFacilities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r4.c1 | Net receipts rental parking facilities/First forecast year | bzk-ww-i:ReceiptsRentalParkingFacilities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r4.c2 | Net receipts rental parking facilities/Second forecast year | bzk-ww-i:ReceiptsRentalParkingFacilities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r4.c3 | Net receipts rental parking facilities/Third forecast year | bzk-ww-i:ReceiptsRentalParkingFacilities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r4.c4 | Net receipts rental parking facilities/Fourth forecast year | bzk-ww-i:ReceiptsRentalParkingFacilities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r4.c5 | Net receipts rental parking facilities/Fifth forecast year | bzk-ww-i:ReceiptsRentalParkingFacilities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r5.c0 | Net receipts rental other/Forecast reporting year | bzk-ww-i:ReceiptsRentalOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r5.c1 | Net receipts rental other/First forecast year | bzk-ww-i:ReceiptsRentalOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r5.c2 | Net receipts rental other/Second forecast year | bzk-ww-i:ReceiptsRentalOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r5.c3 | Net receipts rental other/Third forecast year | bzk-ww-i:ReceiptsRentalOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r5.c4 | Net receipts rental other/Fourth forecast year | bzk-ww-i:ReceiptsRentalOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r5.c5 | Net receipts rental other/Fifth forecast year | bzk-ww-i:ReceiptsRentalOther | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |
| r6.c0 | Rental received (from operating activities)/Forecast reporting year | bzk-ww-i:RentalIncomeClassifiedAsOperatingActivities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r6.c1 | Rental received (from operating activities)/First forecast year | bzk-ww-i:RentalIncomeClassifiedAsOperatingActivities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam |
| r6.c2 | Rental received (from operating activities)/Second forecast year | bzk-ww-i:RentalIncomeClassifiedAsOperatingActivities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam |
| r6.c3 | Rental received (from operating activities)/Third forecast year | bzk-ww-i:RentalIncomeClassifiedAsOperatingActivities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam |
| r6.c4 | Rental received (from operating activities)/Fourth forecast year | bzk-ww-i:RentalIncomeClassifiedAsOperatingActivities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam |
| r6.c5 | Rental received (from operating activities)/Fifth forecast year | bzk-ww-i:RentalIncomeClassifiedAsOperatingActivities | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | bzk-ww-dm:DAEBActivitiesMember | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam |