| Reimbursement rights, at fair value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Reimbursement rights, at fair value at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Reimbursement rights, 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 |
| Drittijiet ta’ rimborż, fuq il-bażi tal-valur ġust | mt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| L-ammont tad-drittijiet tal-entità għar-rimborż minn parti oħra tan-nefqa kollha, jew parti minnha, li hija meħtieġa sabiex issalda obbligu ta’ benefiċċju definit rikonoxxut bħala assi separat u mkejjel fuq il-bażi tal-valur ġust. [Refer: Fuq il-bażi tal-valur ġust [member]] | mt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |