| 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 dos ganhos (perdas) reconhecidos na perda do controlo da filial, atribuível ao desreconhecimento dos saldos dos diferimentos regulamentares na antiga filial | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A parte dos ganhos (perdas) decorrentes da perda do controlo de uma filial, atribuível ao desreconhecimento dos saldos dos diferimentos regulamentares na antiga filial. [Consultar: Ganhos (perdas) reconhecidos na perda do controlo da filial; Saldos dos diferimentos regulamentares [member]; Filiais [member]] | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |