| Other comprehensive income, before tax, net movement in regulatory deferral account balances related to items that will not be reclassified to profit or loss | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The amount of other comprehensive income, before tax, related to the net movement in regulatory deferral account balances that is related to items that will not be reclassified to profit or loss. [Refer: Regulatory deferral account balances [member]; Other comprehensive income] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Introjtu komprensiv ieħor, qabel it-taxxa, ċaqliq nett fil-bilanċi tal-kont ta’ differiment regolatorju relatat mal-entrati li mhux se jiġu riklassifikati bħala profitt jew telf | mt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| L-ammont ta’ introjtu komprensiv ieħor, qabel it-taxxa, relatat maċ-ċaqliq nett fil-bilanċi tal-kont ta’ differiment regolatorju li huwa relatat mal-entrati li mhux se jiġu riklassifikati bħala profitt jew telf. [Refer: Bilanċi tal-kont ta’ differiment regolatorju [member]; Introjtu komprensiv ieħor] | mt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |