| De in- en uitgaande kasstromen uit pensioenlasten met betrekking tot operationele activiteiten. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Pensionsaufwendungen (aus operativen Tätigkeiten) | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Pension costs (from operating activities) | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Charges liées aux retraites (des activités opérationnelles) | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Pensioenlasten (uit operationele activiteiten) | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Pensionsaufwendungen | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Pension costs | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Prestations de retraite | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Pensioenlasten | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |