| Innerer Wert der Investmentgesellschaft [Titel] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Net value asset investment company [title] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Valeur intrinsèque de l'organisme de placement [titre] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Intrinsieke waarde van de beleggingsinstelling [titel] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Innerer Wert der Investmentgesellschaft | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Net value asset investment company | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Valeur intrinsèque de l'organisme de placement | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Intrinsieke waarde van de beleggingsinstelling | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Innerer Wert der Investmentgesellschaft | de | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Net value asset investment company | en | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Valeur intrinsèque de l'organisme de placement | fr | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Intrinsieke waarde van de beleggingsinstelling | nl | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |