| r0.c0 | Price increase variable expenses/Forecast reporting year | bzk-aw-wsw-i:PriceIncreaseVariableExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c1 | Price increase variable expenses/First forecast year | bzk-aw-wsw-i:PriceIncreaseVariableExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c2 | Price increase variable expenses/Second forecast year | bzk-aw-wsw-i:PriceIncreaseVariableExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c3 | Price increase variable expenses/Third forecast year | bzk-aw-wsw-i:PriceIncreaseVariableExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c4 | Price increase variable expenses/Fourth forecast year | bzk-aw-wsw-i:PriceIncreaseVariableExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c5 | Price increase variable expenses/Fifth forecast year | bzk-aw-wsw-i:PriceIncreaseVariableExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Price increase maintenance expenses/Forecast reporting year | bzk-aw-wsw-i:PriceIncreaseMaintenanceExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodCurrentStartDateParam/$FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c1 | Price increase maintenance expenses/First forecast year | bzk-aw-wsw-i:PriceIncreaseMaintenanceExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodFirstPeriodStartDateParam/$FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c2 | Price increase maintenance expenses/Second forecast year | bzk-aw-wsw-i:PriceIncreaseMaintenanceExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodSecondPeriodStartDateParam/$FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c3 | Price increase maintenance expenses/Third forecast year | bzk-aw-wsw-i:PriceIncreaseMaintenanceExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodThirdPeriodStartDateParam/$FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c4 | Price increase maintenance expenses/Fourth forecast year | bzk-aw-wsw-i:PriceIncreaseMaintenanceExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodFourthPeriodStartDateParam/$FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c5 | Price increase maintenance expenses/Fifth forecast year | bzk-aw-wsw-i:PriceIncreaseMaintenanceExpensesPercentage | num:percentItemType | duration | $FinancialReportingPeriodFifthPeriodStartDateParam/$FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |