| De gewone winst of verlies per aandeel. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Bereinigtes Ergebnis je Aktie | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Basic earnings per share | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Bénéfice effectif par action | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Gewone winst per aandeel | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Bereinigt | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Basic | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Effectif | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Gewoon | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |