| Sachanlagevermögen: Kumulierte Neubewertungen [Titel] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Property, plant and equipment: Accumulated revaluations [title] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Immobilisations corporelles: Réévaluations cumulatives [titre] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Materiële vaste activa: Cumulatieve herwaarderingen [titel] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Sachanlagevermögen: Kumulierte Neubewertungen | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Property, plant and equipment: Accumulated revaluations | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Immobilisations corporelles: Réévaluations cumulatives | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Materiële vaste activa: Cumulatieve herwaarderingen | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Sachanlagevermögen: Kumulierte Neubewertungen | de | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Property, plant and equipment: Accumulated revaluations | en | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Immobilisations corporelles: Réévaluations cumulatives | fr | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Materiële vaste activa: Cumulatieve herwaarderingen | nl | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |