| Credit derivative, fair value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Credit derivative, fair value at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Credit derivative, fair value at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| The fair value of a credit derivative. [Refer: At fair value [member]; Derivatives [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Afledt kreditinstrument, dagsværdi | da | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Dagsværdien af et afledt kreditinstrument. [Reference: til dagsværdi [member], afledte finansielle instrumenter [member]] | da | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Afledt kreditinstrument, dagsværdi i begyndelsen af regnskabsåret | da | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Afledt kreditinstrument, dagsværdi ved slutningen af regnskabsåret | da | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |