| Increase (decrease) through other changes, regulatory deferral account debit balances | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Total increase (decrease) through other changes, regulatory deferral account debit balances | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The increase (decrease) in regulatory deferral account debit balances resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Regulatory deferral account debit balances] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Stigning (fald) gennem andre ændringer, debetsaldi for regulatoriske aktiver og forpligtelser | da | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Stigningen (faldet) i debetsaldi for regulatoriske aktiver og forpligtelser som følge af ændringer, som virksomheden ikke oplyser separat i den samme opgørelse eller note. [Reference: debetsaldi for regulatoriske aktiver og forpligtelser] | da | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Stigning (fald) gennem andre ændringer, debetsaldi for regulatoriske aktiver og forpligtelser, i alt | da | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |