| Kortlopende liquide beleggingen | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Kurzfristige liquide Anlagen | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Liquid investments current | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Placements liquides à court terme | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Kortlopende liquide beleggingen | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Zahlungsmittel und Zahlungsmitteläquivalente | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Cash and cash equivalents | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Trésorerie et équivalents de trésorerie | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Geldmiddelen en kasequivalenten | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |