| Increase (decrease) in net assets available for benefits | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Total increase (decrease) in net assets available for benefits | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The increase (decrease) in net assets available for benefits. Net assets available for benefits are assets of a retirement benefit plan less liabilities other than the actuarial present value of promised retirement benefits. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Stigning (fald) i nettoaktiver disponible for ydelser | da | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Stigningen (faldet) i nettoaktiver, som er disponible for ydelser. Nettoaktiver disponible for ydelser er aktiver i en fratrædelsesordning fratrukket forpligtelser bortset fra den aktuarmæssige nutidsværdi af lovede fratrædelsesydelser. | da | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Stigning (fald) i nettoaktiver, som er disponible for ydelser, i alt | da | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |