| r0.c0 | Energy index smaller or equal to zero point six/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c1 | Energy index smaller or equal to zero point six/First forecast year | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c2 | Energy index smaller or equal to zero point six/Second forecast year | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c3 | Energy index smaller or equal to zero point six/Third forecast year | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c4 | Energy index smaller or equal to zero point six/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c5 | Energy index smaller or equal to zero point six/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c0 | Energy index higher than zero point six and smaller or equal to zero point eight/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c1 | Energy index higher than zero point six and smaller or equal to zero point eight/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c2 | Energy index higher than zero point six and smaller or equal to zero point eight/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c3 | Energy index higher than zero point six and smaller or equal to zero point eight/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c4 | Energy index higher than zero point six and smaller or equal to zero point eight/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r1.c5 | Energy index higher than zero point six and smaller or equal to zero point eight/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c0 | Energy index higher than zero point eight and smaller or equal to one point two/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c1 | Energy index higher than zero point eight and smaller or equal to one point two/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c2 | Energy index higher than zero point eight and smaller or equal to one point two/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c3 | Energy index higher than zero point eight and smaller or equal to one point two/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c4 | Energy index higher than zero point eight and smaller or equal to one point two/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r2.c5 | Energy index higher than zero point eight and smaller or equal to one point two/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c0 | Energy index higher than one point two and smaller or equal to one point four/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c1 | Energy index higher than one point two and smaller or equal to one point four/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c2 | Energy index higher than one point two and smaller or equal to one point four/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c3 | Energy index higher than one point two and smaller or equal to one point four/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c4 | Energy index higher than one point two and smaller or equal to one point four/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r3.c5 | Energy index higher than one point two and smaller or equal to one point four/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c0 | Energy index higher than one point four and smaller or equal to one point eight/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c1 | Energy index higher than one point four and smaller or equal to one point eight/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c2 | Energy index higher than one point four and smaller or equal to one point eight/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c3 | Energy index higher than one point four and smaller or equal to one point eight/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c4 | Energy index higher than one point four and smaller or equal to one point eight/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r4.c5 | Energy index higher than one point four and smaller or equal to one point eight/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c0 | Energy index higher than one point eight and smaller or equal to two point one/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c1 | Energy index higher than one point eight and smaller or equal to two point one/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c2 | Energy index higher than one point eight and smaller or equal to two point one/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c3 | Energy index higher than one point eight and smaller or equal to two point one/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c4 | Energy index higher than one point eight and smaller or equal to two point one/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r5.c5 | Energy index higher than one point eight and smaller or equal to two point one/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c0 | Energy index higher than two point one and smaller or equal to two point four/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c1 | Energy index higher than two point one and smaller or equal to two point four/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c2 | Energy index higher than two point one and smaller or equal to two point four/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c3 | Energy index higher than two point one and smaller or equal to two point four/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c4 | Energy index higher than two point one and smaller or equal to two point four/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r6.c5 | Energy index higher than two point one and smaller or equal to two point four/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c0 | Energy index higher than two point four and smaller or equal to two point seven/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c1 | Energy index higher than two point four and smaller or equal to two point seven/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c2 | Energy index higher than two point four and smaller or equal to two point seven/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c3 | Energy index higher than two point four and smaller or equal to two point seven/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c4 | Energy index higher than two point four and smaller or equal to two point seven/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r7.c5 | Energy index higher than two point four and smaller or equal to two point seven/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c0 | Energy index higher than two point seven/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c1 | Energy index higher than two point seven/First forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c2 | Energy index higher than two point seven/Second forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c3 | Energy index higher than two point seven/Third forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c4 | Energy index higher than two point seven/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r8.c5 | Energy index higher than two point seven/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c0 | Energy index unknown/Forecast reporting year | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c1 | Energy index unknown/First forecast year | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c2 | Energy index unknown/Second forecast year | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c3 | Energy index unknown/Third forecast year | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c4 | Energy index unknown/Fourth forecast year | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r9.c5 | Energy index unknown/Fifth forecast year | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c0 | Number to energy index/Forecast reporting year | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodCurrentEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c1 | Number to energy index/First forecast year | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFirstPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c2 | Number to energy index/Second forecast year | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodSecondPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c3 | Number to energy index/Third forecast year | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodThirdPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c4 | Number to energy index/Fourth forecast year | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFourthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r10.c5 | Number to energy index/Fifth forecast year | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | $FinancialReportingPeriodFifthPeriodEndDateParam | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |