| Het totaal van de mutaties in de negatieve goodwill gedurende de verslagperiode. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Mutation des negativen Firmenwerts während der Periode | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Movement of negative goodwill during the period | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Mouvement du goodwill négatif au cours de l'exercice | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Mutatie van negatieve goodwill gedurende de periode | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Mutation während der Periode | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Movement during the period | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Mouvement au cours de l'exercice | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Mutatie gedurende de periode | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Gesamtbetrag der Mutationen während der Periode | de | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total of movements during the period | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total des mouvements pendant la période | fr | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Totaal van mutaties gedurende de periode | nl | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |