| Langfristige Schulden: Aufschlüsselung [Titel] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Non-current liabilities: Breakdown [title] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Dettes à long terme: Ventilation [titre] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Langlopende schulden: Uitsplitsing [titel] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Langfristige Schulden: Aufschlüsselung | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Non-current liabilities: Breakdown | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Dettes à long terme: Ventilation | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Langlopende schulden: Uitsplitsing | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Langfristige Schulden: Aufschlüsselung | de | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Non-current liabilities: Breakdown | en | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Dettes à long terme: Ventilation | fr | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |
| Langlopende schulden: Uitsplitsing | nl | http://www.xbrl.org/2008/role/terseLabel | http://www.xbrl.org/2008/role/link |