| Net movement in regulatory deferral account balances related to profit or loss and net movement in related deferred tax | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Total net movement in regulatory deferral account balances related to profit or loss and net movement in related deferred tax | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The amount of the net movement in regulatory deferral account balances related to profit or loss and the net movement in related deferred tax. [Refer: Net movement in regulatory deferral account balances related to profit or loss; Net movement in deferred tax arising from regulatory deferral account balances related to profit or loss] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Ċaqliq nett fil-bilanċi tal-kont ta’ differiment regolatorju relatat ma’ profitt jew telf u ċaqliq nett fit-taxxa differita relatata | mt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| L-ammont taċ-ċaqliq nett fil-bilanċi tal-kont ta’ differiment regolatorju relatat ma’ profitt jew telf u ċ-ċaqliq nett fit-taxxa differita relatata. [Refer: Ċaqliq nett fil-bilanċi tal-kont ta’ differiment regolatorju relatat ma’ profitt jew telf; Ċaqliq nett fit-taxxa differita li jinħoloq mill-bilanċi tal-kont ta’ differiment regolatorju relatat ma’ profitt jew telf] | mt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Ċaqliq nett totali fil-bilanċi tal-kont ta’ differiment regolatorju relatati ma’ profitt jew telf u ċaqliq nett fit-taxxa differita relatata | mt | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |