| Interest income, defined benefit plans | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Interest income, defined benefit plans | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The amount of interest income arising from defined benefit plans. [Refer: Interest income; Post-employment benefit expense in profit or loss, defined benefit plans] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Ioncam úis, pleananna sochair shainithe | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| An méid ioncam úis a eascraíonn as pleananna sochair shainithe. [Féach: Ioncam úis; Speansas sochair iarfhostaíochta i mbrabús nó caillteanas, pleananna sochair shainithe] [Codarsnacht: Méadú (laghdú) ar ghlandliteanas sochair shainithe (sócmhainn) a eascraíonn as speansas úis (ioncam)] | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Ioncam úis, pleananna sochair shainithe | ga | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |