| Aktienzertifikate oder verwaltete Aktien [Titel] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Share certificates or shares held in administration [title] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Certificats d'actions possédés par les administrateurs [titre] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Certificaten van aandelen of in beheer gehouden aandelen [titel] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Aktienzertifikate oder verwaltete Aktien | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Share certificates or shares held in administration | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Certificats d'actions possédés par les administrateurs | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Certificaten van aandelen of in beheer gehouden aandelen | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Aktienzertifikate oder verwaltete Aktien | de | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Share certificates or shares held in administration | en | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Certificats d'actions possédés par les administrateurs | fr | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Certificaten van aandelen of in beheer gehouden aandelen | nl | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |