| r0.c0 | Under the retirement age, income lower or equal to income limit Wht, three and multiple person households/bzk-table_NumberOfAssignmentsTripleAndMultiplePersonHouseholdsConsolidatedHousingDviTable-x.1.1.1.1 | bzk-dvi-i:UnderRetirementAgeIncomeLowerOrEqualToIncomeLimitWhtSinglePersonHouseholdsTripleAndMultiplePerson | xbrli:nonNegativeIntegerItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r1.c0 | Under the retirement age, income higher than income limit Wht, three and multiple person households/bzk-table_NumberOfAssignmentsTripleAndMultiplePersonHouseholdsConsolidatedHousingDviTable-x.1.1.1.1 | bzk-dvi-i:UnderRetirementAgeIncomeHigherThanIncomeLimitWhtSinglePersonHouseholdsTripleAndMultiplePerson | xbrli:nonNegativeIntegerItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r2.c0 | Above the retirement age, income lower or equal to income limit Wht, three and multiple person households/bzk-table_NumberOfAssignmentsTripleAndMultiplePersonHouseholdsConsolidatedHousingDviTable-x.1.1.1.1 | bzk-dvi-i:AboveRetirementAgeIncomeLowerOrEqualToIncomeLimitWhtSinglePersonHouseholdsTripleAndMultiplePerson | xbrli:nonNegativeIntegerItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r3.c0 | Above the retirement age, income lower higher than income limit Wht, three and multiple person households/bzk-table_NumberOfAssignmentsTripleAndMultiplePersonHouseholdsConsolidatedHousingDviTable-x.1.1.1.1 | bzk-dvi-i:AboveRetirementAgeIncomeHigherThanIncomeLimitWhtSinglePersonHouseholdsTripleAndMultiplePerson | xbrli:nonNegativeIntegerItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r4.c0 | Number of assignments per rental limit/bzk-table_NumberOfAssignmentsTripleAndMultiplePersonHouseholdsConsolidatedHousingDviTable-x.1.1.1.1 | bzk-dvi-i:NumberOfAssignmentsPerRentalLimitSinglePersonHouseholdsTripleAndMultiplePerson | xbrli:nonNegativeIntegerItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |