| Regulatory deferral account balances [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for regulatory deferral account balances. A regulatory deferral account balance is the balance of any expense (or income) account that would not be recognised as an asset or a liability in accordance with other Standards, but that qualifies for deferral because it is included, or is expected to be included, by the rate regulator in establishing the rate(s) that can be charged to customers. This member also represents the standard value for the 'Regulatory deferral account balances' axis if no other member is used. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Iarmhéideanna cuntais iarchurtha rialála [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. Is é iarmhéid cuntais iarchurtha rialála iarmhéid aon chuntas speansais (nó ioncaim) nach n‑aithneofaí mar shócmhainn ná mar dliteanas i gcomhréir le Caighdeáin eile, ach a cháilítear le haghaidh iarchurtha mar gheall go bhfuil sé san áireamh, nó go bhfuiltear ag súil lena bheith san áireamh, sa rialtóir rátaí atá an chun an ráta (na rátaí) is féidir a ghearradh ar chustaiméirí a bhunú. Léirítear leis an mball sin an luach caighdeánach le haghaidh na haise ‘Iarmhéideanna cuntais iarchurtha rialála' mura n‑úsáidtear aon bhall eile. | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |