| De verkoopopbrengsten uit verkopen aan derden. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Verkäufe an Dritte | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Sales to third parties | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Ventes à des tiers | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Verkopen aan derden | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Summe der Verkäufe an Dritte | de | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total of sales to third parties | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total de ventes à des tiers | fr | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Totaal van verkopen aan derden | nl | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |