| Immateriellen Anlagevermögen: Kumulierte Neubewertungen [Titel] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Intangible assets: Accumulated revaluations [title] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Immobilisations incorporelles: Réévaluations cumulatives [titre] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Immateriële vaste activa: Cumulatieve herwaarderingen [titel] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Immateriellen Anlagevermögen: Kumulierte Neubewertungen | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Intangible assets: Accumulated revaluations | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Immobilisations incorporelles: Réévaluations cumulatives | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Immateriële vaste activa: Cumulatieve herwaarderingen | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Immateriellen Anlagevermögen: Kumulierte Neubewertungen | de | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Intangible assets: Accumulated revaluations | en | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Immobilisations incorporelles: Réévaluations cumulatives | fr | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Immateriële vaste activa: Cumulatieve herwaarderingen | nl | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |