Ajustes por ganancias no distribuidas de inversiones contabilizadas utilizando el método de la participación Non current provisions and other liabilities The amount of non current provisions and other liabilities. Disclosure of interest rate risk [Text Block] Disclosure of interest rate risk Disclosure of provisions, other liabilities and employee benefit obligations [Text Block] Disclosure of provisions, other liabilities and employee benefit obligations Non current bank borrowings and bond issues The amount of non current bank borrowings and bond issues. Disclosure of the environmental information [Text Block] Disclosure of the environmental information Dividendos reconocidos como distribuciones a los propietarios Flujos de efectivo procedentes de (utilizados en) actividades de financiación Proceeds from bank borrowings classified as financing activities The cash inflow from bank borrowings, classified as financing activities. CELLNEX: Capital Reduction to Non-Controlling Interest CELLNEX: Capital Reduction to Non-Controlling Interest Distribution of Profit Distribution of Profit The increase (decrease) in equity resulting from the distribution of profit . Description of accounting policy for net equity [Text Block] Description of accounting policy for net equity Cellnex: Reservas Consolidadas [Member] Cellnex: Reservas Consolidadas Disclosure of initial application of standards or interpretations [Text Block] Disclosure of initial application of standards or interpretations Flujos de efectivo procedentes de (utilizados en) actividades de inversión Cash flows from losing control of subsidiaries or other businesses Cash flows from losing control of subsidiaries or other businesses Current provisions and other liabilities Current provisions and other liabilities Reducción del capital emitido Impuesto sobre las ganancias relativo a componentes de otro resultado global que se reclasificarán en resultados Disclosure of inflation risk [Text Block] Disclosure of inflation risk Repayments of bank borrowings classified as financing activities Repayments of bank borrowings classified as financing activities The cash outflow for the repayments of bank borrowings classified as financing activities. Current provisions and employee benefit obligations classified as operating activities Current provisions and employee benefit obligations classified as operating activities Inflows (outflows) of cash due to current provisions and employee benefit obligations, classified as operating activities. Finance costs excluding interest expense on lease liabilities The amount of costs associated with financing activities of the entity excluding interest expense on lease liabilities. Proceeds from equity instruments, purchase of own equity instruments and Dividends paid Proceeds from equity instruments, purchase of own equity instruments and Dividends paid Flujos de efectivo procedentes de (utilizados en) actividades de explotación Disclosure of bond issues and other loans [Text Block] Disclosure of bond issues and other loans Impuesto sobre las ganancias relativo a componentes de otro resultado global que no se reclasificarán en resultados Gastos por intereses de pasivos por arrendamientos Ingresos ordinarios y otros ingresos de explotación Ingresos (costes) financieros Gastos por retribuciones a los empleados Cellnex: Correciones valorativas por deterioro Cellnex: Correciones valorativas por deterioro Adquisición de instrumentos financieros, clasificada como actividades de inversión Gain Loss From Loss Of Control Of Subsidiaries Gain Loss From Loss Of Control Of Subsidiaries Gain Loss From Loss Of Control Of Subsidiaries Disclosure related with the Group indebtment [Text Block] Disclosure related with the Group indebtment Incremento (decremento) en efectivo y equivalentes al efectivo Disclosure of variations in consolidation scope [Text Block] Disclosure of variations in consolidation scope Changes in the fair value of financial liabilities at fair value through equity Changes in the fair value of financial liabilities at fair value through equity Changes in the fair value of financial liabilities at fair value through equity Adquisición de inmovilizado material, activos intangibles distintos del fondo de comercio, inversiones inmobiliarias y otros activos no corrientes cash and cash equivalents and financial investments [Text Block] cash and cash equivalents and financial investments Profit loss for reporting period attributable to owners of parent The profit (loss) of the year attributable to owners of the parent. Cellnex: Profit loss attributable to owners of parent New [Member] Cellnex: Profit loss attributable to owners of parent Acciones propias Cellnex: Acquisition of own shares Cellnex: Acquisition of own shares Description of accounting policy for provisions and contingent liabilities [Text Block] Description of accounting policy for provisions and contingent liabilities Gastos por depreciación y amortización Ajustes por reclasificación relativos a coberturas de flujos de efectivo, antes de impuestos Disclosure of other information [Text Block] Disclosure of other information Adjustments for increase (decrease) in other assets and liabilities Adjustments for increase (decrease) in other assets and liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities. Description of accounting policy for financial liabilities and net equity [Text Block] Description of accounting policy for financial liabilities and net equity Ajustes por pérdida por deterioro del valor (reversión de pérdida por deterioro del valor) reconocida en el resultado Current bank borrowings and bond issues The amount of current bank borrowings and bond issues. Disclosure of income and expenses [Text Block] Disclosure of income and expenses Dividendos pagados, clasificados como actividades de financiación Results from disposal of non-current assets Cellnex: Results from disposal of non-current assets Change in other provisions expense Change in other provisions expense The amount of change in other provisions expense. Reembolsos de obligaciones con y sin garantía y pagarés Disclosure of loans and credit facilities [Text Block] Disclosure of loans and credit facilities Ajustes por ingresos financieros Net repayments of other borrowings classified as financing activities Net repayments of other borrowings classified as financing activities The cash outflow for the net repayments of other borrowings classified as financing activities.