| Regulatory deferral account balances classified as disposal groups [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for regulatory deferral account balances that are classified as disposal groups. [Refer: Disposal groups classified as held for sale [member]; Regulatory deferral account balances [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Iarmhéideanna cuntais iarchurtha rialála a aicmítear mar ghrúpaí diúscartha [member] | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Seasann an ball seo d’iarmhéideanna cuntais iarchurtha rialála a aicmítear mar ghrúpaí diúscartha. [Féach: Grúpaí diúscartha a aicmítear mar ghrúpaí atá á sealbhú lena ndíol [member]; Iarmhéideanna cuntais iarchurtha rialála [member]] | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |