| Decrease through disposals, regulatory deferral account credit balances | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Decrease through disposals, regulatory deferral account credit balances | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The decrease in regulatory deferral account credit balances resulting from disposals. [Refer: Regulatory deferral account credit balances] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Reducere prin cedări, solduri creditoare ale conturilor de amânare aferente activităților reglementate | ro | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Reducerea soldurilor creditoare ale conturilor de amânare aferente activităților reglementate ca urmare a cedărilor. [Referințe: solduri creditoare ale conturilor de amânare aferente activităților reglementate] | ro | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Reducere prin cedări, solduri creditoare ale conturilor de amânare aferente activităților reglementate | ro | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |