| Decrease through balances recovered in current period, regulatory deferral account debit balances | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Decrease through balances recovered in current period, regulatory deferral account debit balances | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The decrease in regulatory deferral account debit balances resulting from balances recovered in the current period. [Refer: Regulatory deferral account debit balances] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Diminuição através dos saldos recuperados no período corrente, saldos devedores dos diferimentos regulamentares | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A diminuição dos saldos devedores dos diferimentos regulamentares decorrente de saldos recuperados no período corrente. [Consultar: Saldos devedores dos diferimentos regulamentares] | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Diminuição através dos saldos recuperados no período corrente, saldos devedores dos diferimentos regulamentares | pt | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |