| davon ERP-Eigenkapitalhilfedarlehen | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Vgl. Internetseite der KFW www.kfw-mittelstandsbank.de. | de | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Verbindlichkeiten gegenüber Kreditinstituten, davon ERP-Eigenkapitalhilfedarlehen | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| of which ERP equity assistance loans | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Liabilities to banks, of which ERP equity assistance loans | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |