| Het totaal van de mutaties in de goodwill gedurende de verslagperiode. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Mutation des Firmenwerts während der Periode | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Movement of goodwill during the period | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Mouvement du goodwill au cours de l'exercice | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Mutatie van 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 |