| In Verwaltung gehaltene Aktien [as] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Shares held in administration [axis] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Actions possédées par les administrateurs [axe] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| In beheer gehouden aandelen [as] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| In Verwaltung gehaltene Aktien | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Shares held in administration | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Actions détenues par les administrateurs | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| In beheer gehouden aandelen | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |