| r0.c0 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Branch | bzk-ww-i:BranchActivity | bzk-ww-codes:branchItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c1 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Borrower of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanBorrower | nl-types:string1000ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c2 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Fixed or variable type of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanTypeLoan | bzk-ww-codes:loanItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c3 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Eur interest period of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanEurInterestPeriod | nl-types:string1000ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c4 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Euribor premium percentage of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanEuriborPremiumPercentage | num:percentItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c5 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Interest rate of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanInterestRate | num:percentItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c6 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Redemption form of loan not secured by WSW | bzk-ww-i:NonWSWSecuredRedemptionFormLoan | bzk-ww-codes:redemptionFormItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c7 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Contract start date of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanContractStartDate | xbrli:dateItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c8 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/End date contract of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanContractEndDate | xbrli:dateItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c9 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Nominal remaining liability of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanRemainingLiability | nl-types:monetaryNoDecimals20ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c10 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Coupon frequency of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanCouponFrequency | nl-types:string1000ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c11 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Coupon date 1 of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanCouponDate1 | xbrli:dateItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c12 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Coupon date 2 of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanCouponDate2 | xbrli:dateItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c13 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Name financier of loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanNameFinancier | nl-types:string1000ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c14 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Loan not secured by WSW guaranteed by | bzk-ww-i:NonWSWSecuredLoanGuaranteedBy | nl-types:string1000ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |
| r0.c15 | bzk-table_1PeriodeTypeJaarrekening1DynamischeAsDurationPeriodeZichtbaar_NonWswSecuredLoansSpecificationConsolidatedHousingDviTable-y/Disclosure of the loan not secured by WSW | bzk-ww-i:NonWSWSecuredLoanDisclosure | nl-types:string1000ItemType | duration | * | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam |