| Property, plant and equipment [member] | ||||||||||||||||||||
| Land and buildings [member] | Machinery [member] | Vehicles [member] | Fixtures and fittings [member] | Computer equipment [member] | Communication and network equipment [member] | Network infrastructure [member] | Bearer plants [member] | Tangible exploration and evaluation assets [member] | Leasehold improvements [member] | Property, plant and equipment under operating leases [member] | Construction in progress [member] | Otras [miembro] | ||||||||
| Land [member] | Buildings [member] | Ships [member] | Aircraft [member] | Motor vehicles [member] | ||||||||||||||||
| Disclosure of detailed information about property, plant and equipment [abstract] | ||||||||||||||||||||
| Disclosure of detailed information about property, plant and equipment [line items] | ||||||||||||||||||||
| Measurement bases, property, plant and equipment | ||||||||||||||||||||
| Depreciation method, property, plant and equipment | ||||||||||||||||||||
| Useful lives or depreciation rates, property, plant and equipment | ||||||||||||||||||||
| Fecha de vigencia de revaluación, propiedades, planta y equipo | ||||||||||||||||||||
| Explanation of involvement of independent valuer in revaluation, property, plant and equipment | ||||||||||||||||||||
| Explicación del método de revaluación y supuestos significativos, propiedad, planta y equipo | ||||||||||||||||||||
| 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 | ||||||||||||||||||||
| Acquisitions through business combinations, 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 | ||||||||||||||||||||
| Increase (decrease) through transfers and other changes, property, plant and equipment [abstract] | ||||||||||||||||||||
| Increase (decrease) through transfers from (to) investment property, property, plant and equipment | ||||||||||||||||||||
| Increase (decrease) through transfers from construction in progress, property, plant and equipment | ||||||||||||||||||||
| Increase (decrease) through other changes, property, plant and equipment | ||||||||||||||||||||
| Propiedades, planta y equipo, Incremento (disminuciones) activos por derecho de uso (arrendamientos) | ||||||||||||||||||||
| Increase (decrease) through transfers and other changes, property, plant and equipment | ||||||||||||||||||||
| Disposals and retirements, property, plant and equipment [abstract] | ||||||||||||||||||||
| Disposals, property, plant and equipment | ||||||||||||||||||||
| Retirements, property, plant and equipment | ||||||||||||||||||||
| Disposals and retirements, property, plant and equipment | ||||||||||||||||||||
| Decrease through classified as held for sale, property, plant and equipment | ||||||||||||||||||||
| Increase (decrease) in property, plant and equipment | ||||||||||||||||||||
| Property, plant and equipment | ||||||||||||||||||||
| Propiedades, planta y equipo, revaluación [sinopsis] | ||||||||||||||||||||
| Propiedades, planta y equipo, activos revaluados | ||||||||||||||||||||
| Propiedades, planta y equipo, activos revaluados, al costo | ||||||||||||||||||||
| Propiedades, planta y equipo, superávit de revaluación | ||||||||||||||||||||