| Basic and diluted earnings (loss) per share from continuing operations, including net movement in regulatory deferral account balances and net movement in related deferred tax | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Basic and diluted earnings (loss) per share from continuing operations that include the net movement in regulatory deferral account balances and the net movement in related deferred tax. [Refer: Basic and diluted earnings (loss) per share; Net movement in regulatory deferral account balances related to profit or loss and net movement in related deferred tax; Continuing operations [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Ganancias (pérdidas) por acción básicas y diluidas procedentes de operaciones continuadas, incluyendo el movimiento neto en saldos de cuentas de diferimientos de actividades reguladas y el movimiento neto en impuestos diferidos relacionados | es | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |