| Taxation-related regulatory deferral account balances [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for a class of regulatory deferral account balances that relates to taxation. [Refer: Classes of regulatory deferral account balances [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Reguleeritud hinnatingimustes müügitulu saldod, mis on maksustamisega seotud [member] | et | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| See liige kajastab reguleeritud hinnatingimustes müügitulu saldode klassi, mis on seotud maksustamisega. [Viide: reguleeritud hinnatingimustes müügitulu saldo klassid [member]] | et | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |