| Portion of gains (losses) recognised when control of subsidiary is lost, attributable to derecognising regulatory deferral account balances in former subsidiary | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The portion of gains (losses) from losing control of a subsidiary that is attributable to derecognising regulatory deferral account balances in the former subsidiary. [Refer: Gains (losses) recognised when control of subsidiary is lost; Regulatory deferral account balances [member]; Subsidiaries [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Parte de las ganancias (pérdidas) reconocidas cuando se pierde el control de la subsidiaria, atribuible a la baja en cuentas de saldos de cuentas de diferimientos de actividades reguladas en la anterior subsidiaria | es | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |