| Contingent liabilities [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for possible obligations that arise from past events and whose existence will be confirmed only by the occurrence or non-occurrence of one or more uncertain future events not wholly within the control of the entity; or, present obligations that arise from past events but are not recognised because (a) it is probable that an outflow of resources embodying economic benefits will be required to settle the obligations; or (b) the amount of the obligations cannot be measured with sufficient reliability. It also represents the standard value for the 'Classes of contingent liabilities' axis if no other member is used. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Dliteanais theagmhasacha [member] | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Seasann an ball seo d’oibleagáidí féideartha a eascraíonn as imeachtaí roimhe seo agus nach ndeimhneofar gurbh ann dóibh ach amháin i gcás ina dtarlóidh nó nach dtarlóidh imeacht éiginnte amháin nó níos mó sa todhchaí, imeacht nach mbeidh go hiomlán faoi smacht an eintitis; nó, oibleagáidí láithreacha a eascraíonn as imeachtaí roimhe seo ach nach n‑aithnítear toisc (a) gur dócha go gceanglófar eis‑sreabhadh acmhainní, ar sochair eacnamaíocha a bheidh i gceist leo, chun na hoibleagáidí a shocrú; nó (b) ní féidir an méid oibleagáidí a thomhas ar bhealach atá iontaofa go leor. Léirítear leis freisin an luach caighdeánach le haghaidh na haise 'Aicmí dliteanas teagmhasach' mura n‑úsáidtear aon bhall eile. | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |