| De aangeschafte en in eigen beheer vervaardigde immateriële vast activa per segment ten behoeve van de gesegmenteerde informatie. | nl | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Investitionen in immaterielles Anlagevermögen nach Segment | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Additions to intangible assets by segment | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Investissements dans des immobilisations incorporelles par segment | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Investeringen in immateriële vaste activa per segment | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Investitionen in immaterielles Anlagevermögen | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Additions to intangible assets | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Investissements dans des immobilisations incorporelles | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Investeringen in immateriële vaste activa | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |