| r0.c0 | Marketvalue of loans/Current | bzk-ww-i:MarketValueLoans | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r1.c0 | Market value of loans not secured by WSW/Current | bzk-ww-i:MarketValueWSWNotSecuredLoans | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r2.c0 | Market value derivatives/Current | bzk-ww-i:MarketValueDerivatives | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r3.c0 | What is the size of the undrawn part of variable principal loans?/Current | bzk-ww-i:SizeUndrawnVariablePrincipalLoans | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r4.c0 | What is the size of the nominal agio of the borrowings obtained in the balance sheet?/Current | bzk-ww-i:SizeNominalAgioOfBorrowings | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | bzk-ww-dm:CompoundNonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |