| Name | bs.eqLiab.equity.revenueRes.other.netRetainedProfitFormerYear |
|---|---|
| Namespace | http://www.xbrl.de/taxonomies/de-gaap-ci-2021-04-14 |
| Prefix | de-gaap-ci |
| Data type | xbrli:monetaryItemType |
| Period type | instant |
| Substitution Group | xbrli:item |
| Balance | credit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| andere Gewinnrücklagen, davon aus dem Bilanzgewinn des Vorjahres eingestellt | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| davon aus dem Bilanzgewinn des Vorjahres eingestellt | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Other revenue reserves, of which from prior year net retained profits | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| of which from prior year net reatined profits | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Name | BMEL-Jahresabschluss; Anlage 1-7; KapG | http://www.xbrl.org/2003/role/reference |
| Paragraph | Code 1423 | http://www.xbrl.org/2003/role/reference |
| Subparagraph | III 4 | http://www.xbrl.org/2003/role/reference |
| LUF | true | http://www.xbrl.org/2003/role/reference |
| Name | AktG | http://www.xbrl.org/2003/role/reference |
| Number | 1 | http://www.xbrl.org/2003/role/reference |
| Paragraph | 152 | http://www.xbrl.org/2003/role/reference |
| Subparagraph | 3 | http://www.xbrl.org/2003/role/reference |
| LUF | true | http://www.xbrl.org/2003/role/reference |
| legalFormKSt | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| legalFormPG | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| typeOperatingResult | neutral | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |