| Tangible exploration and evaluation assets [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for a class of property, plant and equipment representing tangible exploration and evaluation assets. [Refer: Exploration and evaluation assets [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Assi tanġibbli ta’ esplorazzjoni u ta’ evalwazzjoni [member] | mt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Dan il-membru jirrappreżenta klassi ta’ proprjetà, impjanti u tagħmir li tirrappreżenta l-assi tanġibbli ta’ esplorazzjoni u ta’ evalwazzjoni. [Refer: Assi ta’ esplorazzjoni u ta’ evalwazzjoni [member]] | mt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |