| Property, plant and equipment [member] | |||||||||||||||||||
| Land and buildings [member] | Machinery [member] | Vehicles [member] | Fixtures and fittings [member] | Office equipment [member] | Computer equipment [member] | Communication and network equipment [member] | Construction in progress [member] | Información complementaria [miembro] | Other property, plant and equipment [member] | ||||||||||
| Land [member] | Buildings [member] | Plantas [miembro] | Ductos [miembro] | Vías [miembro] | Redes y Cables [miembro] | Relleno sanitario [miembro] | |||||||||||||
| Disclosure of detailed information about property, plant and equipment [line items] | |||||||||||||||||||
| Measurement bases, property, plant and equipment | |||||||||||||||||||
| Depreciation method, property, plant and equipment | |||||||||||||||||||
| Vidas útiles o tasas de depreciación, propiedades, planta y equipo | |||||||||||||||||||
| Effective dates of revaluation, property, plant and equipment | |||||||||||||||||||
| Explanation of involvement of independent valuer in revaluation, property, plant and equipment | |||||||||||||||||||
| Reconciliation of changes in property, plant and equipment [abstract] | |||||||||||||||||||
| Property, plant and equipment | |||||||||||||||||||
| Changes in property, plant and equipment [abstract] | |||||||||||||||||||
| Additions other than through business combinations, property, plant and equipment | |||||||||||||||||||
| Increase (decrease) through net exchange differences, property, plant and equipment | |||||||||||||||||||
| Depreciation, property, plant and equipment | |||||||||||||||||||
| Impairment loss recognised in profit or loss, property, plant and equipment | |||||||||||||||||||
| Reversal of impairment loss recognised in profit or loss, property, plant and equipment | |||||||||||||||||||
| Revaluation increase (decrease), property, plant and equipment | |||||||||||||||||||
| Impairment loss recognised in other comprehensive income, property, plant and equipment | |||||||||||||||||||
| Reversal of impairment loss recognised in other comprehensive income, property, plant and equipment | |||||||||||||||||||
| Disposals and retirements, property, plant and equipment | |||||||||||||||||||
| Decrease through classified as held for sale, property, plant and equipment | |||||||||||||||||||
| Increase (decrease) through other changes, property, plant and equipment | |||||||||||||||||||
| Increase (decrease) in property, plant and equipment | |||||||||||||||||||
| Property, plant and equipment | |||||||||||||||||||
| Additional information [abstract] | |||||||||||||||||||
| Property, plant and equipment, expenditures recognised in course of its construction | |||||||||||||||||||
| Property, plant and equipment, temporarily idle | |||||||||||||||||||
| Property, plant and equipment, gross carrying amount of fully depreciated assets still in use | |||||||||||||||||||
| Property, plant and equipment, assets retired from active use and not classified as held for sale | |||||||||||||||||||
| Property, plant and equipment, revaluation [abstract] | |||||||||||||||||||
| Property, plant and equipment, revalued assets | |||||||||||||||||||
| Property, plant and equipment, revalued assets, at cost | |||||||||||||||||||
| Property, plant and equipment, revaluation surplus | |||||||||||||||||||
| Description of restrictions on distribution of revaluation surplus to shareholders, property, plant and equipment | |||||||||||||||||||