| r0.c0 | Interest rate on new loans DAEB/First forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaeb | num:percentItemType | duration | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c1 | Interest rate on new loans DAEB/Second forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaeb | num:percentItemType | duration | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c2 | Interest rate on new loans DAEB/Third forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaeb | num:percentItemType | duration | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c3 | Interest rate on new loans DAEB/Fourth forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaeb | num:percentItemType | duration | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c4 | Interest rate on new loans DAEB/Fifth forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaeb | num:percentItemType | duration | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Interest rate on new loans non-DAEB/First forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaebNonDaeb | num:percentItemType | duration | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c1 | Interest rate on new loans non-DAEB/Second forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaebNonDaeb | num:percentItemType | duration | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c2 | Interest rate on new loans non-DAEB/Third forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaebNonDaeb | num:percentItemType | duration | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c3 | Interest rate on new loans non-DAEB/Fourth forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaebNonDaeb | num:percentItemType | duration | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c4 | Interest rate on new loans non-DAEB/Fifth forecast year | bzk-aw-wsw-i:InterestRateOnNewLoansPercentageDaebNonDaeb | num:percentItemType | duration | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |