| Description of basis on which regulatory deferral account balances are recognised and derecognised, and how they are measured initially and subsequently | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The description of the basis on which regulatory deferral account balances are recognised and derecognised, and how they are measured initially and subsequently, including how regulatory deferral account balances are assessed for recoverability and how any impairment loss is allocated. [Refer: Regulatory deferral account balances [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Descripción de la base sobre la que se reconocen y dan de baja en cuentas los saldos de cuentas de diferimientos de actividades reguladas, y cómo se miden inicial y posteriormente | es | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |