| Name | BMEL-Jahresabschluss | http://www.xbrl.org/2003/role/reference |
| Subparagraph | B I 1 | http://www.xbrl.org/2003/role/reference |
| LUF | true | http://www.xbrl.org/2003/role/reference |
| Paragraph | Code 1010 | http://www.xbrl.org/2003/role/reference |
| ValidThrough | 2016-03-30 | http://www.xbrl.org/2003/role/reference |
| legalFormEU | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| 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 |
| LUF | true | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| fiscalRequirement | Rechnerisch notwendig, soweit vorhanden | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |
| keineBranche | false | http://www.xbrl.org/2003/role/mandatoryDisclosureRef |