| r0.c0 | Financial assets/Current | jenv-bw2-i:FinancialAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r1.c0 | Shares, certificates of shares and other types of participating interests in group companies/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r2.c0 | Non-current receivables from group companies/Current | jenv-bw2-i:ReceivablesGroupCompaniesNoncurrent | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r3.c0 | Other investments in participating interests/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r4.c0 | Non-current receivables from shareholders and participating interests/Current | jenv-bw2-i:ReceivablesShareholdersParticipatingInterestsNoncurrent | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r5.c0 | Non-current deferred tax assets/Current | rj-i:DeferredTaxAssetsNoncurrent | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r6.c0 | Loans granted/Current | bzk-ti-i:LoansGranted | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r7.c0 | Non-current other securities/Current | jenv-bw2-i:SecuritiesOtherNoncurrent | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r8.c0 | Receivables BWS subsidies (non-current)/Current | bzk-ti-i:ReceivablesBWSSubsidiesNoncurrent | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r9.c0 | Non-current other receivables/Current | jenv-bw2-i:ReceivablesOtherNoncurrent | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r10.c0 | Net asset value non-DAEB (compound)/Current | bzk-ti-i:NetAssetValueNonDAEBCompound | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |
| r11.c0 | Internal loan (asset)/Current | bzk-ti-i:InternalLoanAsset | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | bzk-ti-dm:NonDAEBActivitiesMember | $FinancialReportingPeriodCurrentEndDateParam |