| De vorderingen op OCW en EZ. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Receivables on non-current OCW and EZ | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Vorderingen op langlopende OCW en EZ | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Receivables on OCW and EZ | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Vorderingen op OCW en EZ | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |