| Income tax relating to changes in revaluation surplus of property, plant and equipment, right-of-use assets and intangible assets included in other comprehensive income | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Income tax relating to changes in revaluation surplus of property, plant and equipment, right-of-use assets and intangible assets included in other comprehensive income | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |
| The amount of income tax relating to amounts recognised in other comprehensive income in relation to changes in a revaluation surplus of property, plant and equipment, right-of-use assets and intangible assets. [Refer: Revaluation surplus; Other comprehensive income] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Cáin ioncaim a bhaineann le hathruithe ar bharrachas athluachála maoine, gléasra agus trealaimh, sócmhainní lena ngabhann ceart úsáide agus sócmhainní doláimhsithe a áirítear in ioncam cuimsitheach eile | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| An méid cánach ioncaim a bhaineann le méideanna a aithnítear in ioncam cuimsitheach eile i ndáil le hathruithe ar bharrachas athluachála maoine, gléasra agus trealaimh, sócmhainní lena ngabhann an ceart úsáide agus sócmhainní doláimhsithe. [Féach: Barrachas athluachála; Ioncam cuimsitheach eile] | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Cáin ioncaim a bhaineann le hathruithe ar bharrachas athluachála maoine, gléasra agus trealaimh, sócmhainní lena ngabhann ceart úsáide agus sócmhainní doláimhsithe a áirítear in ioncam cuimsitheach eile | ga | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |