| Reimbursement rights related to defined benefit obligation, at fair value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Reimbursement rights related to defined benefit obligation, at fair value at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Reimbursement rights related to defined benefit obligation, at fair value at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| The amount of the entity's rights to the reimbursement by another party of some or all of the expenditure required to settle a defined benefit obligation recognised as a separate asset and measured at fair value. [Refer: At fair value [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Cearta aisíocaíochta a bhaineann le hoibleagáid sochair shainithe, ag luach cóir | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Méid chearta an eintitis chun aisíocaíocht a fháil ó pháirtí eile ar roinnt nó ar an gcaiteachas iomlán is gá chun oibleagáid sochair shainithe atá aitheanta mar shócmhainn ar leithligh agus a tomhaiseadh ag luach cóir a réiteach. [Féach: Ag luach cóir [member]] | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Cearta aisíocaíochta a bhaineann le hoibleagáid sochair shainithe, ag luach cóir ag tús na tréimhse | ga | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Cearta aisíocaíochta a bhaineann le hoibleagáid sochair shainithe, ag luach cóir ag deireadh na tréimhse | ga | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |