| Contingent liability for decommissioning, restoration and rehabilitation costs [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for a contingent liability relating to decommissioning, restoration and rehabilitation costs. [Refer: Contingent liabilities [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Obbligazzjoni kontinġenti għall-kostijiet tad-dekummissjonar, tar-restawr u tar-riabilitazzjoni [member] | mt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Dan il-membru jirrappreżenta obbligazzjoni kontinġenti relatata mal-kostijiet tad-dekummissjonar, tar-restawr u tar-riabilitazzjoni. [Refer: Obbligazzjonijiet kontinġenti [member]] | mt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |